1/*-
2 * ------+---------+---------+-------- + --------+---------+---------+---------*
3 * This file includes significant modifications done by:
4 * Copyright (c) 2003, 2004  - Garance Alistair Drosehn <gad@FreeBSD.org>.
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 *   1. Redistributions of source code must retain the above copyright
11 *      notice, this list of conditions and the following disclaimer.
12 *   2. Redistributions in binary form must reproduce the above copyright
13 *      notice, this list of conditions and the following disclaimer in the
14 *      documentation and/or other materials provided with the distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 * SUCH DAMAGE.
27 *
28 * ------+---------+---------+-------- + --------+---------+---------+---------*
29 */
30
31/*
32 * This file contains changes from the Open Software Foundation.
33 */
34
35/*
36 * Copyright 1988, 1989 by the Massachusetts Institute of Technology
37 *
38 * Permission to use, copy, modify, and distribute this software and its
39 * documentation for any purpose and without fee is hereby granted, provided
40 * that the above copyright notice appear in all copies and that both that
41 * copyright notice and this permission notice appear in supporting
42 * documentation, and that the names of M.I.T. and the M.I.T. S.I.P.B. not be
43 * used in advertising or publicity pertaining to distribution of the
44 * software without specific, written prior permission. M.I.T. and the M.I.T.
45 * S.I.P.B. make no representations about the suitability of this software
46 * for any purpose.  It is provided "as is" without express or implied
47 * warranty.
48 *
49 */
50
51/*
52 * newsyslog - roll over selected logs at the appropriate time, keeping the a
53 * specified number of backup files around.
54 */
55
56#include <sys/cdefs.h>
57__FBSDID("$FreeBSD$");
58
59#define	OSF
60
61#include <sys/param.h>
62#include <sys/queue.h>
63#include <sys/sbuf.h>
64#include <sys/stat.h>
65#include <sys/wait.h>
66
67#include <assert.h>
68#include <ctype.h>
69#include <err.h>
70#include <errno.h>
71#include <dirent.h>
72#include <fcntl.h>
73#include <fnmatch.h>
74#include <glob.h>
75#include <grp.h>
76#include <paths.h>
77#include <pwd.h>
78#include <signal.h>
79#include <stdio.h>
80#include <libgen.h>
81#include <stdlib.h>
82#include <string.h>
83#include <syslog.h>
84#include <time.h>
85#include <unistd.h>
86
87#include "pathnames.h"
88#include "extern.h"
89
90/*
91 * Compression types
92 */
93#define	COMPRESS_TYPES  5	/* Number of supported compression types */
94
95#define	COMPRESS_NONE	0
96#define	COMPRESS_GZIP	1
97#define	COMPRESS_BZIP2	2
98#define	COMPRESS_XZ	3
99#define COMPRESS_ZSTD	4
100
101/*
102 * Bit-values for the 'flags' parsed from a config-file entry.
103 */
104#define	CE_BINARY	0x0008	/* Logfile is in binary, do not add status */
105				/*    messages to logfile(s) when rotating. */
106#define	CE_NOSIGNAL	0x0010	/* There is no process to signal when */
107				/*    trimming this file. */
108#define	CE_TRIMAT	0x0020	/* trim file at a specific time. */
109#define	CE_GLOB		0x0040	/* name of the log is file name pattern. */
110#define	CE_SIGNALGROUP	0x0080	/* Signal a process-group instead of a single */
111				/*    process when trimming this file. */
112#define	CE_CREATE	0x0100	/* Create the log file if it does not exist. */
113#define	CE_NODUMP	0x0200	/* Set 'nodump' on newly created log file. */
114#define	CE_PID2CMD	0x0400	/* Replace PID file with a shell command.*/
115#define	CE_PLAIN0	0x0800	/* Do not compress zero'th history file */
116#define	CE_RFC5424	0x1000	/* Use RFC5424 format rotation message */
117
118#define	MIN_PID         5	/* Don't touch pids lower than this */
119#define	MAX_PID		99999	/* was lower, see /usr/include/sys/proc.h */
120
121#define	kbytes(size)  (((size) + 1023) >> 10)
122
123#define	DEFAULT_MARKER	"<default>"
124#define	DEBUG_MARKER	"<debug>"
125#define	INCLUDE_MARKER	"<include>"
126#define	DEFAULT_TIMEFNAME_FMT	"%Y%m%dT%H%M%S"
127
128#define	MAX_OLDLOGS 65536	/* Default maximum number of old logfiles */
129
130struct compress_types {
131	const char *flag;	/* Flag in configuration file */
132	const char *suffix;	/* Compression suffix */
133	const char *path;	/* Path to compression program */
134	const char **flags;	/* Compression program flags */
135	int nflags;		/* Program flags count */
136};
137
138static const char *gzip_flags[] = { "-f" };
139#define bzip2_flags gzip_flags
140#define xz_flags gzip_flags
141static const char *zstd_flags[] = { "-q", "--rm" };
142
143static const struct compress_types compress_type[COMPRESS_TYPES] = {
144	{ "", "", "", NULL, 0 },
145	{ "Z", ".gz", _PATH_GZIP, gzip_flags, nitems(gzip_flags) },
146	{ "J", ".bz2", _PATH_BZIP2, bzip2_flags, nitems(bzip2_flags) },
147	{ "X", ".xz", _PATH_XZ, xz_flags, nitems(xz_flags) },
148	{ "Y", ".zst", _PATH_ZSTD, zstd_flags, nitems(zstd_flags) }
149};
150
151struct conf_entry {
152	STAILQ_ENTRY(conf_entry) cf_nextp;
153	char *log;		/* Name of the log */
154	char *pid_cmd_file;		/* PID or command file */
155	char *r_reason;		/* The reason this file is being rotated */
156	int firstcreate;	/* Creating log for the first time (-C). */
157	int rotate;		/* Non-zero if this file should be rotated */
158	int fsize;		/* size found for the log file */
159	uid_t uid;		/* Owner of log */
160	gid_t gid;		/* Group of log */
161	int numlogs;		/* Number of logs to keep */
162	int trsize;		/* Size cutoff to trigger trimming the log */
163	int hours;		/* Hours between log trimming */
164	struct ptime_data *trim_at;	/* Specific time to do trimming */
165	unsigned int permissions;	/* File permissions on the log */
166	int flags;		/* CE_BINARY */
167	int compress;		/* Compression */
168	int sig;		/* Signal to send */
169	int def_cfg;		/* Using the <default> rule for this file */
170};
171
172struct sigwork_entry {
173	SLIST_ENTRY(sigwork_entry) sw_nextp;
174	int	 sw_signum;		/* the signal to send */
175	int	 sw_pidok;		/* true if pid value is valid */
176	pid_t	 sw_pid;		/* the process id from the PID file */
177	const char *sw_pidtype;		/* "daemon" or "process group" */
178	int	 sw_runcmd;		/* run command or send PID to signal */
179	char	 sw_fname[1];		/* file the PID was read from or shell cmd */
180};
181
182struct zipwork_entry {
183	SLIST_ENTRY(zipwork_entry) zw_nextp;
184	const struct conf_entry *zw_conf;	/* for chown/perm/flag info */
185	const struct sigwork_entry *zw_swork;	/* to know success of signal */
186	int	 zw_fsize;		/* size of the file to compress */
187	char	 zw_fname[1];		/* the file to compress */
188};
189
190struct include_entry {
191	STAILQ_ENTRY(include_entry) inc_nextp;
192	const char *file;	/* Name of file to process */
193};
194
195struct oldlog_entry {
196	char *fname;		/* Filename of the log file */
197	time_t t;		/* Parsed timestamp of the logfile */
198};
199
200typedef enum {
201	FREE_ENT, KEEP_ENT
202}	fk_entry;
203
204STAILQ_HEAD(cflist, conf_entry);
205static SLIST_HEAD(swlisthead, sigwork_entry) swhead =
206    SLIST_HEAD_INITIALIZER(swhead);
207static SLIST_HEAD(zwlisthead, zipwork_entry) zwhead =
208    SLIST_HEAD_INITIALIZER(zwhead);
209STAILQ_HEAD(ilist, include_entry);
210
211int dbg_at_times;		/* -D Show details of 'trim_at' code */
212
213static int archtodir = 0;	/* Archive old logfiles to other directory */
214static int createlogs;		/* Create (non-GLOB) logfiles which do not */
215				/*    already exist.  1=='for entries with */
216				/*    C flag', 2=='for all entries'. */
217int verbose = 0;		/* Print out what's going on */
218static int needroot = 1;	/* Root privs are necessary */
219int noaction = 0;		/* Don't do anything, just show it */
220static int norotate = 0;	/* Don't rotate */
221static int nosignal;		/* Do not send any signals */
222static int enforcepid = 0;	/* If PID file does not exist or empty, do nothing */
223static int force = 0;		/* Force the trim no matter what */
224static int rotatereq = 0;	/* -R = Always rotate the file(s) as given */
225				/*    on the command (this also requires   */
226				/*    that a list of files *are* given on  */
227				/*    the run command). */
228static char *requestor;		/* The name given on a -R request */
229static char *timefnamefmt = NULL;/* Use time based filenames instead of .0 */
230static char *archdirname;	/* Directory path to old logfiles archive */
231static char *destdir = NULL;	/* Directory to treat at root for logs */
232static const char *conf;	/* Configuration file to use */
233
234struct ptime_data *dbg_timenow;	/* A "timenow" value set via -D option */
235static struct ptime_data *timenow; /* The time to use for checking at-fields */
236
237#define	DAYTIME_LEN	16
238static char daytime[DAYTIME_LEN];/* The current time in human readable form,
239				  * used for rotation-tracking messages. */
240
241/* Another buffer to hold the current time in RFC5424 format. Fractional
242 * seconds are allowed by the RFC, but are not included in the
243 * rotation-tracking messages written by newsyslog and so are not accounted for
244 * in the length below.
245 */
246#define	DAYTIME_RFC5424_LEN	sizeof("YYYY-MM-DDTHH:MM:SS+00:00")
247static char daytime_rfc5424[DAYTIME_RFC5424_LEN];
248
249static char hostname[MAXHOSTNAMELEN]; /* hostname */
250static size_t hostname_shortlen;
251
252static const char *path_syslogpid = _PATH_SYSLOGPID;
253
254static struct cflist *get_worklist(char **files);
255static void parse_file(FILE *cf, struct cflist *work_p, struct cflist *glob_p,
256		    struct conf_entry **defconf, struct ilist *inclist);
257static void add_to_queue(const char *fname, struct ilist *inclist);
258static char *sob(char *p);
259static char *son(char *p);
260static int isnumberstr(const char *);
261static int isglobstr(const char *);
262static char *missing_field(char *p, char *errline);
263static void	 change_attrs(const char *, const struct conf_entry *);
264static const char *get_logfile_suffix(const char *logfile);
265static fk_entry	 do_entry(struct conf_entry *);
266static fk_entry	 do_rotate(const struct conf_entry *);
267static void	 do_sigwork(struct sigwork_entry *);
268static void	 do_zipwork(struct zipwork_entry *);
269static struct sigwork_entry *
270		 save_sigwork(const struct conf_entry *);
271static struct zipwork_entry *
272		 save_zipwork(const struct conf_entry *, const struct
273		    sigwork_entry *, int, const char *);
274static void	 set_swpid(struct sigwork_entry *, const struct conf_entry *);
275static int	 sizefile(const char *);
276static void expand_globs(struct cflist *work_p, struct cflist *glob_p);
277static void free_clist(struct cflist *list);
278static void free_entry(struct conf_entry *ent);
279static struct conf_entry *init_entry(const char *fname,
280		struct conf_entry *src_entry);
281static void parse_args(int argc, char **argv);
282static int parse_doption(const char *doption);
283static void usage(void);
284static int log_trim(const char *logname, const struct conf_entry *log_ent);
285static int age_old_log(const char *file);
286static void savelog(char *from, char *to);
287static void createdir(const struct conf_entry *ent, char *dirpart);
288static void createlog(const struct conf_entry *ent);
289static int parse_signal(const char *str);
290
291/*
292 * All the following take a parameter of 'int', but expect values in the
293 * range of unsigned char.  Define wrappers which take values of type 'char',
294 * whether signed or unsigned, and ensure they end up in the right range.
295 */
296#define	isdigitch(Anychar) isdigit((u_char)(Anychar))
297#define	isprintch(Anychar) isprint((u_char)(Anychar))
298#define	isspacech(Anychar) isspace((u_char)(Anychar))
299#define	tolowerch(Anychar) tolower((u_char)(Anychar))
300
301int
302main(int argc, char **argv)
303{
304	struct cflist *worklist;
305	struct conf_entry *p;
306	struct sigwork_entry *stmp;
307	struct zipwork_entry *ztmp;
308
309	SLIST_INIT(&swhead);
310	SLIST_INIT(&zwhead);
311
312	parse_args(argc, argv);
313	argc -= optind;
314	argv += optind;
315
316	if (needroot && getuid() && geteuid())
317		errx(1, "must have root privs");
318	worklist = get_worklist(argv);
319
320	/*
321	 * Rotate all the files which need to be rotated.  Note that
322	 * some users have *hundreds* of entries in newsyslog.conf!
323	 */
324	while (!STAILQ_EMPTY(worklist)) {
325		p = STAILQ_FIRST(worklist);
326		STAILQ_REMOVE_HEAD(worklist, cf_nextp);
327		if (do_entry(p) == FREE_ENT)
328			free_entry(p);
329	}
330
331	/*
332	 * Send signals to any processes which need a signal to tell
333	 * them to close and re-open the log file(s) we have rotated.
334	 * Note that zipwork_entries include pointers to these
335	 * sigwork_entry's, so we can not free the entries here.
336	 */
337	if (!SLIST_EMPTY(&swhead)) {
338		if (noaction || verbose)
339			printf("Signal all daemon process(es)...\n");
340		SLIST_FOREACH(stmp, &swhead, sw_nextp)
341			do_sigwork(stmp);
342		if (!(rotatereq && nosignal)) {
343			if (noaction)
344				printf("\tsleep 10\n");
345			else {
346				if (verbose)
347					printf("Pause 10 seconds to allow "
348					    "daemon(s) to close log file(s)\n");
349				sleep(10);
350			}
351		}
352	}
353	/*
354	 * Compress all files that we're expected to compress, now
355	 * that all processes should have closed the files which
356	 * have been rotated.
357	 */
358	if (!SLIST_EMPTY(&zwhead)) {
359		if (noaction || verbose)
360			printf("Compress all rotated log file(s)...\n");
361		while (!SLIST_EMPTY(&zwhead)) {
362			ztmp = SLIST_FIRST(&zwhead);
363			do_zipwork(ztmp);
364			SLIST_REMOVE_HEAD(&zwhead, zw_nextp);
365			free(ztmp);
366		}
367	}
368	/* Now free all the sigwork entries. */
369	while (!SLIST_EMPTY(&swhead)) {
370		stmp = SLIST_FIRST(&swhead);
371		SLIST_REMOVE_HEAD(&swhead, sw_nextp);
372		free(stmp);
373	}
374
375	while (wait(NULL) > 0 || errno == EINTR)
376		;
377	return (0);
378}
379
380static struct conf_entry *
381init_entry(const char *fname, struct conf_entry *src_entry)
382{
383	struct conf_entry *tempwork;
384
385	if (verbose > 4)
386		printf("\t--> [creating entry for %s]\n", fname);
387
388	tempwork = malloc(sizeof(struct conf_entry));
389	if (tempwork == NULL)
390		err(1, "malloc of conf_entry for %s", fname);
391
392	if (destdir == NULL || fname[0] != '/')
393		tempwork->log = strdup(fname);
394	else
395		asprintf(&tempwork->log, "%s%s", destdir, fname);
396	if (tempwork->log == NULL)
397		err(1, "strdup for %s", fname);
398
399	if (src_entry != NULL) {
400		tempwork->pid_cmd_file = NULL;
401		if (src_entry->pid_cmd_file)
402			tempwork->pid_cmd_file = strdup(src_entry->pid_cmd_file);
403		tempwork->r_reason = NULL;
404		tempwork->firstcreate = 0;
405		tempwork->rotate = 0;
406		tempwork->fsize = -1;
407		tempwork->uid = src_entry->uid;
408		tempwork->gid = src_entry->gid;
409		tempwork->numlogs = src_entry->numlogs;
410		tempwork->trsize = src_entry->trsize;
411		tempwork->hours = src_entry->hours;
412		tempwork->trim_at = NULL;
413		if (src_entry->trim_at != NULL)
414			tempwork->trim_at = ptime_init(src_entry->trim_at);
415		tempwork->permissions = src_entry->permissions;
416		tempwork->flags = src_entry->flags;
417		tempwork->compress = src_entry->compress;
418		tempwork->sig = src_entry->sig;
419		tempwork->def_cfg = src_entry->def_cfg;
420	} else {
421		/* Initialize as a "do-nothing" entry */
422		tempwork->pid_cmd_file = NULL;
423		tempwork->r_reason = NULL;
424		tempwork->firstcreate = 0;
425		tempwork->rotate = 0;
426		tempwork->fsize = -1;
427		tempwork->uid = (uid_t)-1;
428		tempwork->gid = (gid_t)-1;
429		tempwork->numlogs = 1;
430		tempwork->trsize = -1;
431		tempwork->hours = -1;
432		tempwork->trim_at = NULL;
433		tempwork->permissions = 0;
434		tempwork->flags = 0;
435		tempwork->compress = COMPRESS_NONE;
436		tempwork->sig = SIGHUP;
437		tempwork->def_cfg = 0;
438	}
439
440	return (tempwork);
441}
442
443static void
444free_entry(struct conf_entry *ent)
445{
446
447	if (ent == NULL)
448		return;
449
450	if (ent->log != NULL) {
451		if (verbose > 4)
452			printf("\t--> [freeing entry for %s]\n", ent->log);
453		free(ent->log);
454		ent->log = NULL;
455	}
456
457	if (ent->pid_cmd_file != NULL) {
458		free(ent->pid_cmd_file);
459		ent->pid_cmd_file = NULL;
460	}
461
462	if (ent->r_reason != NULL) {
463		free(ent->r_reason);
464		ent->r_reason = NULL;
465	}
466
467	if (ent->trim_at != NULL) {
468		ptime_free(ent->trim_at);
469		ent->trim_at = NULL;
470	}
471
472	free(ent);
473}
474
475static void
476free_clist(struct cflist *list)
477{
478	struct conf_entry *ent;
479
480	while (!STAILQ_EMPTY(list)) {
481		ent = STAILQ_FIRST(list);
482		STAILQ_REMOVE_HEAD(list, cf_nextp);
483		free_entry(ent);
484	}
485
486	free(list);
487	list = NULL;
488}
489
490static fk_entry
491do_entry(struct conf_entry * ent)
492{
493#define	REASON_MAX	80
494	int modtime;
495	fk_entry free_or_keep;
496	double diffsecs;
497	char temp_reason[REASON_MAX];
498	int oversized;
499
500	free_or_keep = FREE_ENT;
501	if (verbose)
502		printf("%s <%d%s>: ", ent->log, ent->numlogs,
503		    compress_type[ent->compress].flag);
504	ent->fsize = sizefile(ent->log);
505	oversized = ((ent->trsize > 0) && (ent->fsize >= ent->trsize));
506	modtime = age_old_log(ent->log);
507	ent->rotate = 0;
508	ent->firstcreate = 0;
509	if (ent->fsize < 0) {
510		/*
511		 * If either the C flag or the -C option was specified,
512		 * and if we won't be creating the file, then have the
513		 * verbose message include a hint as to why the file
514		 * will not be created.
515		 */
516		temp_reason[0] = '\0';
517		if (createlogs > 1)
518			ent->firstcreate = 1;
519		else if ((ent->flags & CE_CREATE) && createlogs)
520			ent->firstcreate = 1;
521		else if (ent->flags & CE_CREATE)
522			strlcpy(temp_reason, " (no -C option)", REASON_MAX);
523		else if (createlogs)
524			strlcpy(temp_reason, " (no C flag)", REASON_MAX);
525
526		if (ent->firstcreate) {
527			if (verbose)
528				printf("does not exist -> will create.\n");
529			createlog(ent);
530		} else if (verbose) {
531			printf("does not exist, skipped%s.\n", temp_reason);
532		}
533	} else {
534		if (ent->flags & CE_TRIMAT && !force && !rotatereq &&
535		    !oversized) {
536			diffsecs = ptimeget_diff(timenow, ent->trim_at);
537			if (diffsecs < 0.0) {
538				/* trim_at is some time in the future. */
539				if (verbose) {
540					ptime_adjust4dst(ent->trim_at,
541					    timenow);
542					printf("--> will trim at %s",
543					    ptimeget_ctime(ent->trim_at));
544				}
545				return (free_or_keep);
546			} else if (diffsecs >= 3600.0) {
547				/*
548				 * trim_at is more than an hour in the past,
549				 * so find the next valid trim_at time, and
550				 * tell the user what that will be.
551				 */
552				if (verbose && dbg_at_times)
553					printf("\n\t--> prev trim at %s\t",
554					    ptimeget_ctime(ent->trim_at));
555				if (verbose) {
556					ptimeset_nxtime(ent->trim_at);
557					printf("--> will trim at %s",
558					    ptimeget_ctime(ent->trim_at));
559				}
560				return (free_or_keep);
561			} else if (verbose && noaction && dbg_at_times) {
562				/*
563				 * If we are just debugging at-times, then
564				 * a detailed message is helpful.  Also
565				 * skip "doing" any commands, since they
566				 * would all be turned off by no-action.
567				 */
568				printf("\n\t--> timematch at %s",
569				    ptimeget_ctime(ent->trim_at));
570				return (free_or_keep);
571			} else if (verbose && ent->hours <= 0) {
572				printf("--> time is up\n");
573			}
574		}
575		if (verbose && (ent->trsize > 0))
576			printf("size (Kb): %d [%d] ", ent->fsize, ent->trsize);
577		if (verbose && (ent->hours > 0))
578			printf(" age (hr): %d [%d] ", modtime, ent->hours);
579
580		/*
581		 * Figure out if this logfile needs to be rotated.
582		 */
583		temp_reason[0] = '\0';
584		if (rotatereq) {
585			ent->rotate = 1;
586			snprintf(temp_reason, REASON_MAX, " due to -R from %s",
587			    requestor);
588		} else if (force) {
589			ent->rotate = 1;
590			snprintf(temp_reason, REASON_MAX, " due to -F request");
591		} else if (oversized) {
592			ent->rotate = 1;
593			snprintf(temp_reason, REASON_MAX, " due to size>%dK",
594			    ent->trsize);
595		} else if (ent->hours <= 0 && (ent->flags & CE_TRIMAT)) {
596			ent->rotate = 1;
597		} else if ((ent->hours > 0) && ((modtime >= ent->hours) ||
598		    (modtime < 0))) {
599			ent->rotate = 1;
600		}
601
602		/*
603		 * If the file needs to be rotated, then rotate it.
604		 */
605		if (ent->rotate && !norotate) {
606			if (temp_reason[0] != '\0')
607				ent->r_reason = strdup(temp_reason);
608			if (verbose)
609				printf("--> trimming log....\n");
610			if (noaction && !verbose)
611				printf("%s <%d%s>: trimming\n", ent->log,
612				    ent->numlogs,
613				    compress_type[ent->compress].flag);
614			free_or_keep = do_rotate(ent);
615		} else {
616			if (verbose)
617				printf("--> skipping\n");
618		}
619	}
620	return (free_or_keep);
621#undef REASON_MAX
622}
623
624static void
625parse_args(int argc, char **argv)
626{
627	int ch;
628	char *p;
629
630	timenow = ptime_init(NULL);
631	ptimeset_time(timenow, time(NULL));
632	strlcpy(daytime, ptimeget_ctime(timenow) + 4, DAYTIME_LEN);
633	ptimeget_ctime_rfc5424(timenow, daytime_rfc5424, DAYTIME_RFC5424_LEN);
634
635	/* Let's get our hostname */
636	(void)gethostname(hostname, sizeof(hostname));
637	hostname_shortlen = strcspn(hostname, ".");
638
639	/* Parse command line options. */
640	while ((ch = getopt(argc, argv, "a:d:f:nrst:vCD:FNPR:S:")) != -1)
641		switch (ch) {
642		case 'a':
643			archtodir++;
644			archdirname = optarg;
645			break;
646		case 'd':
647			destdir = optarg;
648			break;
649		case 'f':
650			conf = optarg;
651			break;
652		case 'n':
653			noaction++;
654			/* FALLTHROUGH */
655		case 'r':
656			needroot = 0;
657			break;
658		case 's':
659			nosignal = 1;
660			break;
661		case 't':
662			if (optarg[0] == '\0' ||
663			    strcmp(optarg, "DEFAULT") == 0)
664				timefnamefmt = strdup(DEFAULT_TIMEFNAME_FMT);
665			else
666				timefnamefmt = strdup(optarg);
667			break;
668		case 'v':
669			verbose++;
670			break;
671		case 'C':
672			/* Useful for things like rc.diskless... */
673			createlogs++;
674			break;
675		case 'D':
676			/*
677			 * Set some debugging option.  The specific option
678			 * depends on the value of optarg.  These options
679			 * may come and go without notice or documentation.
680			 */
681			if (parse_doption(optarg))
682				break;
683			usage();
684			/* NOTREACHED */
685		case 'F':
686			force++;
687			break;
688		case 'N':
689			norotate++;
690			break;
691		case 'P':
692			enforcepid++;
693			break;
694		case 'R':
695			rotatereq++;
696			requestor = strdup(optarg);
697			break;
698		case 'S':
699			path_syslogpid = optarg;
700			break;
701		case 'm':	/* Used by OpenBSD for "monitor mode" */
702		default:
703			usage();
704			/* NOTREACHED */
705		}
706
707	if (force && norotate) {
708		warnx("Only one of -F and -N may be specified.");
709		usage();
710		/* NOTREACHED */
711	}
712
713	if (rotatereq) {
714		if (optind == argc) {
715			warnx("At least one filename must be given when -R is specified.");
716			usage();
717			/* NOTREACHED */
718		}
719		/* Make sure "requestor" value is safe for a syslog message. */
720		for (p = requestor; *p != '\0'; p++) {
721			if (!isprintch(*p) && (*p != '\t'))
722				*p = '.';
723		}
724	}
725
726	if (dbg_timenow) {
727		/*
728		 * Note that the 'daytime' variable is not changed.
729		 * That is only used in messages that track when a
730		 * logfile is rotated, and if a file *is* rotated,
731		 * then it will still rotated at the "real now" time.
732		 */
733		ptime_free(timenow);
734		timenow = dbg_timenow;
735		fprintf(stderr, "Debug: Running as if TimeNow is %s",
736		    ptimeget_ctime(dbg_timenow));
737	}
738
739}
740
741/*
742 * These debugging options are mainly meant for developer use, such
743 * as writing regression-tests.  They would not be needed by users
744 * during normal operation of newsyslog...
745 */
746static int
747parse_doption(const char *doption)
748{
749	const char TN[] = "TN=";
750	int res;
751
752	if (strncmp(doption, TN, sizeof(TN) - 1) == 0) {
753		/*
754		 * The "TimeNow" debugging option.  This might be off
755		 * by an hour when crossing a timezone change.
756		 */
757		dbg_timenow = ptime_init(NULL);
758		res = ptime_relparse(dbg_timenow, PTM_PARSE_ISO8601,
759		    time(NULL), doption + sizeof(TN) - 1);
760		if (res == -2) {
761			warnx("Non-existent time specified on -D %s", doption);
762			return (0);			/* failure */
763		} else if (res < 0) {
764			warnx("Malformed time given on -D %s", doption);
765			return (0);			/* failure */
766		}
767		return (1);			/* successfully parsed */
768
769	}
770
771	if (strcmp(doption, "ats") == 0) {
772		dbg_at_times++;
773		return (1);			/* successfully parsed */
774	}
775
776	/* XXX - This check could probably be dropped. */
777	if ((strcmp(doption, "neworder") == 0) || (strcmp(doption, "oldorder")
778	    == 0)) {
779		warnx("NOTE: newsyslog always uses 'neworder'.");
780		return (1);			/* successfully parsed */
781	}
782
783	warnx("Unknown -D (debug) option: '%s'", doption);
784	return (0);				/* failure */
785}
786
787static void
788usage(void)
789{
790
791	fprintf(stderr,
792	    "usage: newsyslog [-CFNPnrsv] [-a directory] [-d directory] [-f config_file]\n"
793	    "                 [-S pidfile] [-t timefmt] [[-R tagname] file ...]\n");
794	exit(1);
795}
796
797/*
798 * Parse a configuration file and return a linked list of all the logs
799 * which should be processed.
800 */
801static struct cflist *
802get_worklist(char **files)
803{
804	FILE *f;
805	char **given;
806	struct cflist *cmdlist, *filelist, *globlist;
807	struct conf_entry *defconf, *dupent, *ent;
808	struct ilist inclist;
809	struct include_entry *inc;
810	int gmatch, fnres;
811
812	defconf = NULL;
813	STAILQ_INIT(&inclist);
814
815	filelist = malloc(sizeof(struct cflist));
816	if (filelist == NULL)
817		err(1, "malloc of filelist");
818	STAILQ_INIT(filelist);
819	globlist = malloc(sizeof(struct cflist));
820	if (globlist == NULL)
821		err(1, "malloc of globlist");
822	STAILQ_INIT(globlist);
823
824	inc = malloc(sizeof(struct include_entry));
825	if (inc == NULL)
826		err(1, "malloc of inc");
827	inc->file = conf;
828	if (inc->file == NULL)
829		inc->file = _PATH_CONF;
830	STAILQ_INSERT_TAIL(&inclist, inc, inc_nextp);
831
832	STAILQ_FOREACH(inc, &inclist, inc_nextp) {
833		if (strcmp(inc->file, "-") != 0)
834			f = fopen(inc->file, "r");
835		else {
836			f = stdin;
837			inc->file = "<stdin>";
838		}
839		if (!f)
840			err(1, "%s", inc->file);
841
842		if (verbose)
843			printf("Processing %s\n", inc->file);
844		parse_file(f, filelist, globlist, &defconf, &inclist);
845		(void) fclose(f);
846	}
847
848	/*
849	 * All config-file information has been read in and turned into
850	 * a filelist and a globlist.  If there were no specific files
851	 * given on the run command, then the only thing left to do is to
852	 * call a routine which finds all files matched by the globlist
853	 * and adds them to the filelist.  Then return the worklist.
854	 */
855	if (*files == NULL) {
856		expand_globs(filelist, globlist);
857		free_clist(globlist);
858		if (defconf != NULL)
859			free_entry(defconf);
860		return (filelist);
861	}
862
863	/*
864	 * If newsyslog was given a specific list of files to process,
865	 * it may be that some of those files were not listed in any
866	 * config file.  Those unlisted files should get the default
867	 * rotation action.  First, create the default-rotation action
868	 * if none was found in a system config file.
869	 */
870	if (defconf == NULL) {
871		defconf = init_entry(DEFAULT_MARKER, NULL);
872		defconf->numlogs = 3;
873		defconf->trsize = 50;
874		defconf->permissions = S_IRUSR|S_IWUSR;
875	}
876
877	/*
878	 * If newsyslog was run with a list of specific filenames,
879	 * then create a new worklist which has only those files in
880	 * it, picking up the rotation-rules for those files from
881	 * the original filelist.
882	 *
883	 * XXX - Note that this will copy multiple rules for a single
884	 *	logfile, if multiple entries are an exact match for
885	 *	that file.  That matches the historic behavior, but do
886	 *	we want to continue to allow it?  If so, it should
887	 *	probably be handled more intelligently.
888	 */
889	cmdlist = malloc(sizeof(struct cflist));
890	if (cmdlist == NULL)
891		err(1, "malloc of cmdlist");
892	STAILQ_INIT(cmdlist);
893
894	for (given = files; *given; ++given) {
895		/*
896		 * First try to find exact-matches for this given file.
897		 */
898		gmatch = 0;
899		STAILQ_FOREACH(ent, filelist, cf_nextp) {
900			if (strcmp(ent->log, *given) == 0) {
901				gmatch++;
902				dupent = init_entry(*given, ent);
903				STAILQ_INSERT_TAIL(cmdlist, dupent, cf_nextp);
904			}
905		}
906		if (gmatch) {
907			if (verbose > 2)
908				printf("\t+ Matched entry %s\n", *given);
909			continue;
910		}
911
912		/*
913		 * There was no exact-match for this given file, so look
914		 * for a "glob" entry which does match.
915		 */
916		gmatch = 0;
917		if (verbose > 2)
918			printf("\t+ Checking globs for %s\n", *given);
919		STAILQ_FOREACH(ent, globlist, cf_nextp) {
920			fnres = fnmatch(ent->log, *given, FNM_PATHNAME);
921			if (verbose > 2)
922				printf("\t+    = %d for pattern %s\n", fnres,
923				    ent->log);
924			if (fnres == 0) {
925				gmatch++;
926				dupent = init_entry(*given, ent);
927				/* This new entry is not a glob! */
928				dupent->flags &= ~CE_GLOB;
929				STAILQ_INSERT_TAIL(cmdlist, dupent, cf_nextp);
930				/* Only allow a match to one glob-entry */
931				break;
932			}
933		}
934		if (gmatch) {
935			if (verbose > 2)
936				printf("\t+ Matched %s via %s\n", *given,
937				    ent->log);
938			continue;
939		}
940
941		/*
942		 * This given file was not found in any config file, so
943		 * add a worklist item based on the default entry.
944		 */
945		if (verbose > 2)
946			printf("\t+ No entry matched %s  (will use %s)\n",
947			    *given, DEFAULT_MARKER);
948		dupent = init_entry(*given, defconf);
949		/* Mark that it was *not* found in a config file */
950		dupent->def_cfg = 1;
951		STAILQ_INSERT_TAIL(cmdlist, dupent, cf_nextp);
952	}
953
954	/*
955	 * Free all the entries in the original work list, the list of
956	 * glob entries, and the default entry.
957	 */
958	free_clist(filelist);
959	free_clist(globlist);
960	free_entry(defconf);
961
962	/* And finally, return a worklist which matches the given files. */
963	return (cmdlist);
964}
965
966/*
967 * Expand the list of entries with filename patterns, and add all files
968 * which match those glob-entries onto the worklist.
969 */
970static void
971expand_globs(struct cflist *work_p, struct cflist *glob_p)
972{
973	int gmatch, gres;
974	size_t i;
975	char *mfname;
976	struct conf_entry *dupent, *ent, *globent;
977	glob_t pglob;
978	struct stat st_fm;
979
980	/*
981	 * The worklist contains all fully-specified (non-GLOB) names.
982	 *
983	 * Now expand the list of filename-pattern (GLOB) entries into
984	 * a second list, which (by definition) will only match files
985	 * that already exist.  Do not add a glob-related entry for any
986	 * file which already exists in the fully-specified list.
987	 */
988	STAILQ_FOREACH(globent, glob_p, cf_nextp) {
989		gres = glob(globent->log, GLOB_NOCHECK, NULL, &pglob);
990		if (gres != 0) {
991			warn("cannot expand pattern (%d): %s", gres,
992			    globent->log);
993			continue;
994		}
995
996		if (verbose > 2)
997			printf("\t+ Expanding pattern %s\n", globent->log);
998		for (i = 0; i < pglob.gl_matchc; i++) {
999			mfname = pglob.gl_pathv[i];
1000
1001			/* See if this file already has a specific entry. */
1002			gmatch = 0;
1003			STAILQ_FOREACH(ent, work_p, cf_nextp) {
1004				if (strcmp(mfname, ent->log) == 0) {
1005					gmatch++;
1006					break;
1007				}
1008			}
1009			if (gmatch)
1010				continue;
1011
1012			/* Make sure the named matched is a file. */
1013			gres = lstat(mfname, &st_fm);
1014			if (gres != 0) {
1015				/* Error on a file that glob() matched?!? */
1016				warn("Skipping %s - lstat() error", mfname);
1017				continue;
1018			}
1019			if (!S_ISREG(st_fm.st_mode)) {
1020				/* We only rotate files! */
1021				if (verbose > 2)
1022					printf("\t+  . skipping %s (!file)\n",
1023					    mfname);
1024				continue;
1025			}
1026
1027			if (verbose > 2)
1028				printf("\t+  . add file %s\n", mfname);
1029			dupent = init_entry(mfname, globent);
1030			/* This new entry is not a glob! */
1031			dupent->flags &= ~CE_GLOB;
1032
1033			/* Add to the worklist. */
1034			STAILQ_INSERT_TAIL(work_p, dupent, cf_nextp);
1035		}
1036		globfree(&pglob);
1037		if (verbose > 2)
1038			printf("\t+ Done with pattern %s\n", globent->log);
1039	}
1040}
1041
1042/*
1043 * Parse a configuration file and update a linked list of all the logs to
1044 * process.
1045 */
1046static void
1047parse_file(FILE *cf, struct cflist *work_p, struct cflist *glob_p,
1048    struct conf_entry **defconf_p, struct ilist *inclist)
1049{
1050	char line[BUFSIZ], *parse, *q;
1051	char *cp, *errline, *group;
1052	struct conf_entry *working;
1053	struct passwd *pwd;
1054	struct group *grp;
1055	glob_t pglob;
1056	int eol, ptm_opts, res, special;
1057	size_t i;
1058
1059	errline = NULL;
1060	while (fgets(line, BUFSIZ, cf)) {
1061		if ((line[0] == '\n') || (line[0] == '#') ||
1062		    (strlen(line) == 0))
1063			continue;
1064		if (errline != NULL)
1065			free(errline);
1066		errline = strdup(line);
1067		for (cp = line + 1; *cp != '\0'; cp++) {
1068			if (*cp != '#')
1069				continue;
1070			if (*(cp - 1) == '\\') {
1071				strcpy(cp - 1, cp);
1072				cp--;
1073				continue;
1074			}
1075			*cp = '\0';
1076			break;
1077		}
1078
1079		q = parse = missing_field(sob(line), errline);
1080		parse = son(line);
1081		if (!*parse) {
1082			warnx("malformed line (missing fields):\n%s",
1083			    errline);
1084			continue;
1085		}
1086		*parse = '\0';
1087
1088		/*
1089		 * Allow people to set debug options via the config file.
1090		 * (NOTE: debug options are undocumented, and may disappear
1091		 * at any time, etc).
1092		 */
1093		if (strcasecmp(DEBUG_MARKER, q) == 0) {
1094			q = parse = missing_field(sob(parse + 1), errline);
1095			parse = son(parse);
1096			if (!*parse)
1097				warnx("debug line specifies no option:\n%s",
1098				    errline);
1099			else {
1100				*parse = '\0';
1101				parse_doption(q);
1102			}
1103			continue;
1104		} else if (strcasecmp(INCLUDE_MARKER, q) == 0) {
1105			if (verbose)
1106				printf("Found: %s", errline);
1107			q = parse = missing_field(sob(parse + 1), errline);
1108			parse = son(parse);
1109			if (!*parse) {
1110				warnx("include line missing argument:\n%s",
1111				    errline);
1112				continue;
1113			}
1114
1115			*parse = '\0';
1116
1117			if (isglobstr(q)) {
1118				res = glob(q, GLOB_NOCHECK, NULL, &pglob);
1119				if (res != 0) {
1120					warn("cannot expand pattern (%d): %s",
1121					    res, q);
1122					continue;
1123				}
1124
1125				if (verbose > 2)
1126					printf("\t+ Expanding pattern %s\n", q);
1127
1128				for (i = 0; i < pglob.gl_matchc; i++)
1129					add_to_queue(pglob.gl_pathv[i],
1130					    inclist);
1131				globfree(&pglob);
1132			} else
1133				add_to_queue(q, inclist);
1134			continue;
1135		}
1136
1137#define badline(msg, ...) do {		\
1138	warnx(msg, __VA_ARGS__);	\
1139	goto cleanup;			\
1140} while (0)
1141
1142		special = 0;
1143		working = init_entry(q, NULL);
1144		if (strcasecmp(DEFAULT_MARKER, q) == 0) {
1145			special = 1;
1146			if (*defconf_p != NULL)
1147				badline("Ignoring duplicate entry for %s!", q);
1148			*defconf_p = working;
1149		}
1150
1151		q = parse = missing_field(sob(parse + 1), errline);
1152		parse = son(parse);
1153		if (!*parse)
1154			badline("malformed line (missing fields):\n%s",
1155			    errline);
1156		*parse = '\0';
1157		if ((group = strchr(q, ':')) != NULL ||
1158		    (group = strrchr(q, '.')) != NULL) {
1159			*group++ = '\0';
1160			if (*q) {
1161				if (!(isnumberstr(q))) {
1162					if ((pwd = getpwnam(q)) == NULL)
1163						badline(
1164				     "error in config file; unknown user:\n%s",
1165						    errline);
1166					working->uid = pwd->pw_uid;
1167				} else
1168					working->uid = atoi(q);
1169			} else
1170				working->uid = (uid_t)-1;
1171
1172			q = group;
1173			if (*q) {
1174				if (!(isnumberstr(q))) {
1175					if ((grp = getgrnam(q)) == NULL)
1176						badline(
1177				    "error in config file; unknown group:\n%s",
1178						    errline);
1179					working->gid = grp->gr_gid;
1180				} else
1181					working->gid = atoi(q);
1182			} else
1183				working->gid = (gid_t)-1;
1184
1185			q = parse = missing_field(sob(parse + 1), errline);
1186			parse = son(parse);
1187			if (!*parse)
1188				badline("malformed line (missing fields):\n%s",
1189				    errline);
1190			*parse = '\0';
1191		} else {
1192			working->uid = (uid_t)-1;
1193			working->gid = (gid_t)-1;
1194		}
1195
1196		if (!sscanf(q, "%o", &working->permissions))
1197			badline("error in config file; bad permissions:\n%s",
1198			    errline);
1199		if ((working->permissions & ~DEFFILEMODE) != 0) {
1200			warnx("File mode bits 0%o changed to 0%o in line:\n%s",
1201			    working->permissions,
1202			    working->permissions & DEFFILEMODE, errline);
1203			working->permissions &= DEFFILEMODE;
1204		}
1205
1206		q = parse = missing_field(sob(parse + 1), errline);
1207		parse = son(parse);
1208		if (!*parse)
1209			badline("malformed line (missing fields):\n%s",
1210			    errline);
1211		*parse = '\0';
1212		if (!sscanf(q, "%d", &working->numlogs) || working->numlogs < 0)
1213			badline("error in config file; bad value for count of logs to save:\n%s",
1214			    errline);
1215
1216		q = parse = missing_field(sob(parse + 1), errline);
1217		parse = son(parse);
1218		if (!*parse)
1219			badline("malformed line (missing fields):\n%s",
1220			    errline);
1221		*parse = '\0';
1222		if (isdigitch(*q))
1223			working->trsize = atoi(q);
1224		else if (strcmp(q, "*") == 0)
1225			working->trsize = -1;
1226		else {
1227			warnx("Invalid value of '%s' for 'size' in line:\n%s",
1228			    q, errline);
1229			working->trsize = -1;
1230		}
1231
1232		working->flags = 0;
1233		working->compress = COMPRESS_NONE;
1234		q = parse = missing_field(sob(parse + 1), errline);
1235		parse = son(parse);
1236		eol = !*parse;
1237		*parse = '\0';
1238		{
1239			char *ep;
1240			u_long ul;
1241
1242			ul = strtoul(q, &ep, 10);
1243			if (ep == q)
1244				working->hours = 0;
1245			else if (*ep == '*')
1246				working->hours = -1;
1247			else if (ul > INT_MAX)
1248				badline("interval is too large:\n%s", errline);
1249			else
1250				working->hours = ul;
1251
1252			if (*ep == '\0' || strcmp(ep, "*") == 0)
1253				goto no_trimat;
1254			if (*ep != '@' && *ep != '$')
1255				badline("malformed interval/at:\n%s", errline);
1256
1257			working->flags |= CE_TRIMAT;
1258			working->trim_at = ptime_init(NULL);
1259			ptm_opts = PTM_PARSE_ISO8601;
1260			if (*ep == '$')
1261				ptm_opts = PTM_PARSE_DWM;
1262			ptm_opts |= PTM_PARSE_MATCHDOM;
1263			res = ptime_relparse(working->trim_at, ptm_opts,
1264			    ptimeget_secs(timenow), ep + 1);
1265			if (res == -2)
1266				badline("nonexistent time for 'at' value:\n%s",
1267				    errline);
1268			else if (res < 0)
1269				badline("malformed 'at' value:\n%s", errline);
1270		}
1271no_trimat:
1272
1273		if (eol)
1274			q = NULL;
1275		else {
1276			q = parse = sob(parse + 1);	/* Optional field */
1277			parse = son(parse);
1278			if (!*parse)
1279				eol = 1;
1280			*parse = '\0';
1281		}
1282
1283		for (; q && *q && !isspacech(*q); q++) {
1284			switch (tolowerch(*q)) {
1285			case 'b':
1286				working->flags |= CE_BINARY;
1287				break;
1288			case 'c':
1289				working->flags |= CE_CREATE;
1290				break;
1291			case 'd':
1292				working->flags |= CE_NODUMP;
1293				break;
1294			case 'g':
1295				working->flags |= CE_GLOB;
1296				break;
1297			case 'j':
1298				working->compress = COMPRESS_BZIP2;
1299				break;
1300			case 'n':
1301				working->flags |= CE_NOSIGNAL;
1302				break;
1303			case 'p':
1304				working->flags |= CE_PLAIN0;
1305				break;
1306			case 'r':
1307				working->flags |= CE_PID2CMD;
1308				break;
1309			case 't':
1310				working->flags |= CE_RFC5424;
1311				break;
1312			case 'u':
1313				working->flags |= CE_SIGNALGROUP;
1314				break;
1315			case 'w':
1316				/* Deprecated flag - keep for compatibility purposes */
1317				break;
1318			case 'x':
1319				working->compress = COMPRESS_XZ;
1320				break;
1321			case 'y':
1322				working->compress = COMPRESS_ZSTD;
1323				break;
1324			case 'z':
1325				working->compress = COMPRESS_GZIP;
1326				break;
1327			case '-':
1328				break;
1329			case 'f':	/* Used by OpenBSD for "CE_FOLLOW" */
1330			case 'm':	/* Used by OpenBSD for "CE_MONITOR" */
1331			default:
1332				badline("illegal flag in config file -- %c",
1333				    *q);
1334			}
1335		}
1336
1337		if (eol)
1338			q = NULL;
1339		else {
1340			q = parse = sob(parse + 1);	/* Optional field */
1341			parse = son(parse);
1342			if (!*parse)
1343				eol = 1;
1344			*parse = '\0';
1345		}
1346
1347		working->pid_cmd_file = NULL;
1348		if (q && *q) {
1349			if (*q == '/')
1350				working->pid_cmd_file = strdup(q);
1351			else if (isalnum(*q))
1352				goto got_sig;
1353			else {
1354				badline(
1355			"illegal pid file or signal in config file:\n%s",
1356				    errline);
1357			}
1358		}
1359		if (eol)
1360			q = NULL;
1361		else {
1362			q = parse = sob(parse + 1);	/* Optional field */
1363			parse = son(parse);
1364			*parse = '\0';
1365		}
1366
1367		working->sig = SIGHUP;
1368		if (q && *q) {
1369got_sig:
1370			working->sig = parse_signal(q);
1371			if (working->sig < 1 || working->sig >= sys_nsig) {
1372				badline(
1373				    "illegal signal in config file:\n%s",
1374				    errline);
1375			}
1376		}
1377
1378		/*
1379		 * Finish figuring out what pid-file to use (if any) in
1380		 * later processing if this logfile needs to be rotated.
1381		 */
1382		if ((working->flags & CE_NOSIGNAL) == CE_NOSIGNAL) {
1383			/*
1384			 * This config-entry specified 'n' for nosignal,
1385			 * see if it also specified an explicit pid_cmd_file.
1386			 * This would be a pretty pointless combination.
1387			 */
1388			if (working->pid_cmd_file != NULL) {
1389				warnx("Ignoring '%s' because flag 'n' was specified in line:\n%s",
1390				    working->pid_cmd_file, errline);
1391				free(working->pid_cmd_file);
1392				working->pid_cmd_file = NULL;
1393			}
1394		} else if (working->pid_cmd_file == NULL) {
1395			/*
1396			 * This entry did not specify the 'n' flag, which
1397			 * means it should signal syslogd unless it had
1398			 * specified some other pid-file (and obviously the
1399			 * syslog pid-file will not be for a process-group).
1400			 * Also, we should only try to notify syslog if we
1401			 * are root.
1402			 */
1403			if (working->flags & CE_SIGNALGROUP) {
1404				warnx("Ignoring flag 'U' in line:\n%s",
1405				    errline);
1406				working->flags &= ~CE_SIGNALGROUP;
1407			}
1408			if (needroot)
1409				working->pid_cmd_file = strdup(path_syslogpid);
1410		}
1411
1412		/*
1413		 * Add this entry to the appropriate list of entries, unless
1414		 * it was some kind of special entry (eg: <default>).
1415		 */
1416		if (special) {
1417			;			/* Do not add to any list */
1418		} else if (working->flags & CE_GLOB) {
1419			STAILQ_INSERT_TAIL(glob_p, working, cf_nextp);
1420		} else {
1421			STAILQ_INSERT_TAIL(work_p, working, cf_nextp);
1422		}
1423		continue;
1424cleanup:
1425		free_entry(working);
1426#undef badline
1427	} /* while (fgets(line, BUFSIZ, cf)) */
1428	if (errline != NULL)
1429		free(errline);
1430}
1431
1432static char *
1433missing_field(char *p, char *errline)
1434{
1435
1436	if (!p || !*p)
1437		errx(1, "missing field in config file:\n%s", errline);
1438	return (p);
1439}
1440
1441/*
1442 * In our sort we return it in the reverse of what qsort normally
1443 * would do, as we want the newest files first.  If we have two
1444 * entries with the same time we don't really care about order.
1445 *
1446 * Support function for qsort() in delete_oldest_timelog().
1447 */
1448static int
1449oldlog_entry_compare(const void *a, const void *b)
1450{
1451	const struct oldlog_entry *ola = a, *olb = b;
1452
1453	if (ola->t > olb->t)
1454		return (-1);
1455	else if (ola->t < olb->t)
1456		return (1);
1457	else
1458		return (0);
1459}
1460
1461/*
1462 * Check whether the file corresponding to dp is an archive of the logfile
1463 * logfname, based on the timefnamefmt format string. Return true and fill out
1464 * tm if this is the case; otherwise return false.
1465 */
1466static int
1467validate_old_timelog(int fd, const struct dirent *dp, const char *logfname,
1468    struct tm *tm)
1469{
1470	struct stat sb;
1471	size_t logfname_len;
1472	char *s;
1473	int c;
1474
1475	logfname_len = strlen(logfname);
1476
1477	if (dp->d_type != DT_REG) {
1478		/*
1479		 * Some filesystems (e.g. NFS) don't fill out the d_type field
1480		 * and leave it set to DT_UNKNOWN; in this case we must obtain
1481		 * the file type ourselves.
1482		 */
1483		if (dp->d_type != DT_UNKNOWN ||
1484		    fstatat(fd, dp->d_name, &sb, AT_SYMLINK_NOFOLLOW) != 0 ||
1485		    !S_ISREG(sb.st_mode))
1486			return (0);
1487	}
1488	/* Ignore everything but files with our logfile prefix. */
1489	if (strncmp(dp->d_name, logfname, logfname_len) != 0)
1490		return (0);
1491	/* Ignore the actual non-rotated logfile. */
1492	if (dp->d_namlen == logfname_len)
1493		return (0);
1494
1495	/*
1496	 * Make sure we created have found a logfile, so the
1497	 * postfix is valid, IE format is: '.<time>(.[bgx]z)?'.
1498	 */
1499	if (dp->d_name[logfname_len] != '.') {
1500		if (verbose)
1501			printf("Ignoring %s which has unexpected "
1502			    "extension '%s'\n", dp->d_name,
1503			    &dp->d_name[logfname_len]);
1504		return (0);
1505	}
1506	memset(tm, 0, sizeof(*tm));
1507	if ((s = strptime(&dp->d_name[logfname_len + 1],
1508	    timefnamefmt, tm)) == NULL) {
1509		/*
1510		 * We could special case "old" sequentially named logfiles here,
1511		 * but we do not as that would require special handling to
1512		 * decide which one was the oldest compared to "new" time based
1513		 * logfiles.
1514		 */
1515		if (verbose)
1516			printf("Ignoring %s which does not "
1517			    "match time format\n", dp->d_name);
1518		return (0);
1519	}
1520
1521	for (c = 0; c < COMPRESS_TYPES; c++)
1522		if (strcmp(s, compress_type[c].suffix) == 0)
1523			/* We're done. */
1524			return (1);
1525
1526	if (verbose)
1527		printf("Ignoring %s which has unexpected extension '%s'\n",
1528		    dp->d_name, s);
1529
1530	return (0);
1531}
1532
1533/*
1534 * Delete the oldest logfiles, when using time based filenames.
1535 */
1536static void
1537delete_oldest_timelog(const struct conf_entry *ent, const char *archive_dir)
1538{
1539	char *basebuf, *dirbuf, errbuf[80];
1540	const char *base, *dir;
1541	int dir_fd, i, logcnt, max_logcnt;
1542	struct oldlog_entry *oldlogs;
1543	struct dirent *dp;
1544	struct tm tm;
1545	DIR *dirp;
1546
1547	oldlogs = malloc(MAX_OLDLOGS * sizeof(struct oldlog_entry));
1548	max_logcnt = MAX_OLDLOGS;
1549	logcnt = 0;
1550
1551	if (archive_dir != NULL && archive_dir[0] != '\0') {
1552		dirbuf = NULL;
1553		dir = archive_dir;
1554	} else {
1555		if ((dirbuf = strdup(ent->log)) == NULL)
1556			err(1, "strdup()");
1557		dir = dirname(dirbuf);
1558	}
1559
1560	if ((basebuf = strdup(ent->log)) == NULL)
1561		err(1, "strdup()");
1562	base = basename(basebuf);
1563	if (strcmp(base, "/") == 0)
1564		errx(1, "Invalid log filename - became '/'");
1565
1566	if (verbose > 2)
1567		printf("Searching for old logs in %s\n", dir);
1568
1569	/* First we create a 'list' of all archived logfiles */
1570	if ((dirp = opendir(dir)) == NULL)
1571		err(1, "Cannot open log directory '%s'", dir);
1572	dir_fd = dirfd(dirp);
1573	while ((dp = readdir(dirp)) != NULL) {
1574		if (validate_old_timelog(dir_fd, dp, base, &tm) == 0)
1575			continue;
1576
1577		/*
1578		 * We should now have old an old rotated logfile, so
1579		 * add it to the 'list'.
1580		 */
1581		if ((oldlogs[logcnt].t = timegm(&tm)) == -1)
1582			err(1, "Could not convert time string to time value");
1583		if ((oldlogs[logcnt].fname = strdup(dp->d_name)) == NULL)
1584			err(1, "strdup()");
1585		logcnt++;
1586
1587		/*
1588		 * It is very unlikely we ever run out of space in the
1589		 * logfile array from the default size, but lets
1590		 * handle it anyway...
1591		 */
1592		if (logcnt >= max_logcnt) {
1593			max_logcnt *= 4;
1594			/* Detect integer overflow */
1595			if (max_logcnt < logcnt)
1596				errx(1, "Too many old logfiles found");
1597			oldlogs = realloc(oldlogs,
1598			    max_logcnt * sizeof(struct oldlog_entry));
1599			if (oldlogs == NULL)
1600				err(1, "realloc()");
1601		}
1602	}
1603
1604	/* Second, if needed we delete oldest archived logfiles */
1605	if (logcnt > 0 && logcnt >= ent->numlogs && ent->numlogs > 1) {
1606		oldlogs = realloc(oldlogs, logcnt *
1607		    sizeof(struct oldlog_entry));
1608		if (oldlogs == NULL)
1609			err(1, "realloc()");
1610
1611		/*
1612		 * We now sort the logs in the order of newest to
1613		 * oldest.  That way we can simply skip over the
1614		 * number of records we want to keep.
1615		 */
1616		qsort(oldlogs, logcnt, sizeof(struct oldlog_entry),
1617		    oldlog_entry_compare);
1618		for (i = ent->numlogs - 1; i < logcnt; i++) {
1619			if (noaction)
1620				printf("\trm -f %s/%s\n", dir,
1621				    oldlogs[i].fname);
1622			else if (unlinkat(dir_fd, oldlogs[i].fname, 0) != 0) {
1623				snprintf(errbuf, sizeof(errbuf),
1624				    "Could not delete old logfile '%s'",
1625				    oldlogs[i].fname);
1626				perror(errbuf);
1627			}
1628		}
1629	} else if (verbose > 1)
1630		printf("No old logs to delete for logfile %s\n", ent->log);
1631
1632	/* Third, cleanup */
1633	closedir(dirp);
1634	for (i = 0; i < logcnt; i++) {
1635		assert(oldlogs[i].fname != NULL);
1636		free(oldlogs[i].fname);
1637	}
1638	free(oldlogs);
1639	free(dirbuf);
1640	free(basebuf);
1641}
1642
1643/*
1644 * Generate a log filename, when using classic filenames.
1645 */
1646static void
1647gen_classiclog_fname(char *fname, size_t fname_sz, const char *archive_dir,
1648    const char *namepart, int numlogs_c)
1649{
1650
1651	if (archive_dir[0] != '\0')
1652		(void) snprintf(fname, fname_sz, "%s/%s.%d", archive_dir,
1653		    namepart, numlogs_c);
1654	else
1655		(void) snprintf(fname, fname_sz, "%s.%d", namepart, numlogs_c);
1656}
1657
1658/*
1659 * Delete a rotated logfile, when using classic filenames.
1660 */
1661static void
1662delete_classiclog(const char *archive_dir, const char *namepart, int numlog_c)
1663{
1664	char file1[MAXPATHLEN], zfile1[MAXPATHLEN];
1665	int c;
1666
1667	gen_classiclog_fname(file1, sizeof(file1), archive_dir, namepart,
1668	    numlog_c);
1669
1670	for (c = 0; c < COMPRESS_TYPES; c++) {
1671		(void) snprintf(zfile1, sizeof(zfile1), "%s%s", file1,
1672		    compress_type[c].suffix);
1673		if (noaction)
1674			printf("\trm -f %s\n", zfile1);
1675		else
1676			(void) unlink(zfile1);
1677	}
1678}
1679
1680/*
1681 * Only add to the queue if the file hasn't already been added. This is
1682 * done to prevent circular include loops.
1683 */
1684static void
1685add_to_queue(const char *fname, struct ilist *inclist)
1686{
1687	struct include_entry *inc;
1688
1689	STAILQ_FOREACH(inc, inclist, inc_nextp) {
1690		if (strcmp(fname, inc->file) == 0) {
1691			warnx("duplicate include detected: %s", fname);
1692			return;
1693		}
1694	}
1695
1696	inc = malloc(sizeof(struct include_entry));
1697	if (inc == NULL)
1698		err(1, "malloc of inc");
1699	inc->file = strdup(fname);
1700
1701	if (verbose > 2)
1702		printf("\t+ Adding %s to the processing queue.\n", fname);
1703
1704	STAILQ_INSERT_TAIL(inclist, inc, inc_nextp);
1705}
1706
1707/*
1708 * Search for logfile and return its compression suffix (if supported)
1709 * The suffix detection is first-match in the order of compress_types
1710 *
1711 * Note: if logfile without suffix exists (uncompressed, COMPRESS_NONE)
1712 * a zero-length string is returned
1713 */
1714static const char *
1715get_logfile_suffix(const char *logfile)
1716{
1717	struct stat st;
1718	char zfile[MAXPATHLEN];
1719	int c;
1720
1721	for (c = 0; c < COMPRESS_TYPES; c++) {
1722		(void) strlcpy(zfile, logfile, MAXPATHLEN);
1723		(void) strlcat(zfile, compress_type[c].suffix, MAXPATHLEN);
1724		if (lstat(zfile, &st) == 0)
1725			return (compress_type[c].suffix);
1726	}
1727	return (NULL);
1728}
1729
1730static fk_entry
1731do_rotate(const struct conf_entry *ent)
1732{
1733	char dirpart[MAXPATHLEN], namepart[MAXPATHLEN];
1734	char file1[MAXPATHLEN], file2[MAXPATHLEN];
1735	char zfile1[MAXPATHLEN], zfile2[MAXPATHLEN];
1736	const char *logfile_suffix;
1737	char datetimestr[30];
1738	int flags, numlogs_c;
1739	fk_entry free_or_keep;
1740	struct sigwork_entry *swork;
1741	struct stat st;
1742	struct tm tm;
1743	time_t now;
1744
1745	flags = ent->flags;
1746	free_or_keep = FREE_ENT;
1747
1748	if (archtodir) {
1749		char *p;
1750
1751		/* build complete name of archive directory into dirpart */
1752		if (*archdirname == '/') {	/* absolute */
1753			strlcpy(dirpart, archdirname, sizeof(dirpart));
1754		} else {	/* relative */
1755			/* get directory part of logfile */
1756			strlcpy(dirpart, ent->log, sizeof(dirpart));
1757			if ((p = strrchr(dirpart, '/')) == NULL)
1758				dirpart[0] = '\0';
1759			else
1760				*(p + 1) = '\0';
1761			strlcat(dirpart, archdirname, sizeof(dirpart));
1762		}
1763
1764		/* check if archive directory exists, if not, create it */
1765		if (lstat(dirpart, &st))
1766			createdir(ent, dirpart);
1767
1768		/* get filename part of logfile */
1769		if ((p = strrchr(ent->log, '/')) == NULL)
1770			strlcpy(namepart, ent->log, sizeof(namepart));
1771		else
1772			strlcpy(namepart, p + 1, sizeof(namepart));
1773	} else {
1774		/*
1775		 * Tell utility functions we are not using an archive
1776		 * dir.
1777		 */
1778		dirpart[0] = '\0';
1779		strlcpy(namepart, ent->log, sizeof(namepart));
1780	}
1781
1782	/* Delete old logs */
1783	if (timefnamefmt != NULL)
1784		delete_oldest_timelog(ent, dirpart);
1785	else {
1786		/*
1787		 * Handle cleaning up after legacy newsyslog where we
1788		 * kept ent->numlogs + 1 files.  This code can go away
1789		 * at some point in the future.
1790		 */
1791		delete_classiclog(dirpart, namepart, ent->numlogs);
1792
1793		if (ent->numlogs > 0)
1794			delete_classiclog(dirpart, namepart, ent->numlogs - 1);
1795
1796	}
1797
1798	if (timefnamefmt != NULL) {
1799		/* If time functions fails we can't really do any sensible */
1800		if (time(&now) == (time_t)-1 ||
1801		    localtime_r(&now, &tm) == NULL)
1802			bzero(&tm, sizeof(tm));
1803
1804		strftime(datetimestr, sizeof(datetimestr), timefnamefmt, &tm);
1805		if (archtodir)
1806			(void) snprintf(file1, sizeof(file1), "%s/%s.%s",
1807			    dirpart, namepart, datetimestr);
1808		else
1809			(void) snprintf(file1, sizeof(file1), "%s.%s",
1810			    ent->log, datetimestr);
1811
1812		/* Don't run the code to move down logs */
1813		numlogs_c = -1;
1814	} else {
1815		gen_classiclog_fname(file1, sizeof(file1), dirpart, namepart,
1816		    ent->numlogs - 1);
1817		numlogs_c = ent->numlogs - 2;		/* copy for countdown */
1818	}
1819
1820	/* Move down log files */
1821	for (; numlogs_c >= 0; numlogs_c--) {
1822		(void) strlcpy(file2, file1, sizeof(file2));
1823
1824		gen_classiclog_fname(file1, sizeof(file1), dirpart, namepart,
1825		    numlogs_c);
1826
1827		logfile_suffix = get_logfile_suffix(file1);
1828		if (logfile_suffix == NULL)
1829			continue;
1830		(void) strlcpy(zfile1, file1, MAXPATHLEN);
1831		(void) strlcpy(zfile2, file2, MAXPATHLEN);
1832		(void) strlcat(zfile1, logfile_suffix, MAXPATHLEN);
1833		(void) strlcat(zfile2, logfile_suffix, MAXPATHLEN);
1834
1835		if (noaction)
1836			printf("\tmv %s %s\n", zfile1, zfile2);
1837		else {
1838			/* XXX - Ought to be checking for failure! */
1839			(void)rename(zfile1, zfile2);
1840		}
1841		change_attrs(zfile2, ent);
1842		if (ent->compress && strlen(logfile_suffix) == 0) {
1843			/* compress old rotation */
1844			struct zipwork_entry *zwork;
1845			size_t sz;
1846
1847			sz = sizeof(*zwork) + strlen(zfile2) + 1;
1848			zwork = calloc(1, sz);
1849			if (zwork == NULL)
1850				err(1, "calloc");
1851
1852			zwork->zw_conf = ent;
1853			zwork->zw_fsize = sizefile(zfile2);
1854			strcpy(zwork->zw_fname, zfile2);
1855			do_zipwork(zwork);
1856			free(zwork);
1857		}
1858	}
1859
1860	if (ent->numlogs > 0) {
1861		if (noaction) {
1862			/*
1863			 * Note that savelog() may succeed with using link()
1864			 * for the archtodir case, but there is no good way
1865			 * of knowing if it will when doing "noaction", so
1866			 * here we claim that it will have to do a copy...
1867			 */
1868			if (archtodir)
1869				printf("\tcp %s %s\n", ent->log, file1);
1870			else
1871				printf("\tln %s %s\n", ent->log, file1);
1872			printf("\ttouch %s\t\t"
1873			    "# Update mtime for 'when'-interval processing\n",
1874			    file1);
1875		} else {
1876			if (!(flags & CE_BINARY)) {
1877				/* Report the trimming to the old log */
1878				log_trim(ent->log, ent);
1879			}
1880			savelog(ent->log, file1);
1881			/*
1882			 * Interval-based rotations are done using the mtime of
1883			 * the most recently archived log, so make sure it gets
1884			 * updated during a rotation.
1885			 */
1886			utimes(file1, NULL);
1887		}
1888		change_attrs(file1, ent);
1889	}
1890
1891	/* Create the new log file and move it into place */
1892	if (noaction)
1893		printf("Start new log...\n");
1894	createlog(ent);
1895
1896	/*
1897	 * Save all signalling and file-compression to be done after log
1898	 * files from all entries have been rotated.  This way any one
1899	 * process will not be sent the same signal multiple times when
1900	 * multiple log files had to be rotated.
1901	 */
1902	swork = NULL;
1903	if (ent->pid_cmd_file != NULL)
1904		swork = save_sigwork(ent);
1905	if (ent->numlogs > 0 && ent->compress > COMPRESS_NONE) {
1906		if (!(ent->flags & CE_PLAIN0) ||
1907		    strcmp(&file1[strlen(file1) - 2], ".0") != 0) {
1908			/*
1909			 * The zipwork_entry will include a pointer to this
1910			 * conf_entry, so the conf_entry should not be freed.
1911			 */
1912			free_or_keep = KEEP_ENT;
1913			save_zipwork(ent, swork, ent->fsize, file1);
1914		}
1915	}
1916
1917	return (free_or_keep);
1918}
1919
1920static void
1921do_sigwork(struct sigwork_entry *swork)
1922{
1923	struct sigwork_entry *nextsig;
1924	int kres, secs;
1925	char *tmp;
1926
1927	if (swork->sw_runcmd == 0 && (!(swork->sw_pidok) || swork->sw_pid == 0))
1928		return;			/* no work to do... */
1929
1930	/*
1931	 * If nosignal (-s) was specified, then do not signal any process.
1932	 * Note that a nosignal request triggers a warning message if the
1933	 * rotated logfile needs to be compressed, *unless* -R was also
1934	 * specified.  We assume that an `-sR' request came from a process
1935	 * which writes to the logfile, and as such, we assume that process
1936	 * has already made sure the logfile is not presently in use.  This
1937	 * just sets swork->sw_pidok to a special value, and do_zipwork
1938	 * will print any necessary warning(s).
1939	 */
1940	if (nosignal) {
1941		if (!rotatereq)
1942			swork->sw_pidok = -1;
1943		return;
1944	}
1945
1946	/*
1947	 * Compute the pause between consecutive signals.  Use a longer
1948	 * sleep time if we will be sending two signals to the same
1949	 * daemon or process-group.
1950	 */
1951	secs = 0;
1952	nextsig = SLIST_NEXT(swork, sw_nextp);
1953	if (nextsig != NULL) {
1954		if (swork->sw_pid == nextsig->sw_pid)
1955			secs = 10;
1956		else
1957			secs = 1;
1958	}
1959
1960	if (noaction) {
1961		if (swork->sw_runcmd)
1962			printf("\tsh -c '%s %d'\n", swork->sw_fname,
1963			    swork->sw_signum);
1964		else {
1965			printf("\tkill -%d %d \t\t# %s\n", swork->sw_signum,
1966			    (int)swork->sw_pid, swork->sw_fname);
1967			if (secs > 0)
1968				printf("\tsleep %d\n", secs);
1969		}
1970		return;
1971	}
1972
1973	if (swork->sw_runcmd) {
1974		asprintf(&tmp, "%s %d", swork->sw_fname, swork->sw_signum);
1975		if (tmp == NULL) {
1976			warn("can't allocate memory to run %s",
1977			    swork->sw_fname);
1978			return;
1979		}
1980		if (verbose)
1981			printf("Run command: %s\n", tmp);
1982		kres = system(tmp);
1983		if (kres) {
1984			warnx("%s: returned non-zero exit code: %d",
1985			    tmp, kres);
1986		}
1987		free(tmp);
1988		return;
1989	}
1990
1991	kres = kill(swork->sw_pid, swork->sw_signum);
1992	if (kres != 0) {
1993		/*
1994		 * Assume that "no such process" (ESRCH) is something
1995		 * to warn about, but is not an error.  Presumably the
1996		 * process which writes to the rotated log file(s) is
1997		 * gone, in which case we should have no problem with
1998		 * compressing the rotated log file(s).
1999		 */
2000		if (errno != ESRCH)
2001			swork->sw_pidok = 0;
2002		warn("can't notify %s, pid %d = %s", swork->sw_pidtype,
2003		    (int)swork->sw_pid, swork->sw_fname);
2004	} else {
2005		if (verbose)
2006			printf("Notified %s pid %d = %s\n", swork->sw_pidtype,
2007			    (int)swork->sw_pid, swork->sw_fname);
2008		if (secs > 0) {
2009			if (verbose)
2010				printf("Pause %d second(s) between signals\n",
2011				    secs);
2012			sleep(secs);
2013		}
2014	}
2015}
2016
2017static void
2018do_zipwork(struct zipwork_entry *zwork)
2019{
2020	const struct compress_types *ct;
2021	struct sbuf *command;
2022	pid_t pidzip, wpid;
2023	int c, errsav, fcount, zstatus;
2024	const char **args, *pgm_name, *pgm_path;
2025	char *zresult;
2026
2027	assert(zwork != NULL);
2028	assert(zwork->zw_conf != NULL);
2029	assert(zwork->zw_conf->compress > COMPRESS_NONE);
2030	assert(zwork->zw_conf->compress < COMPRESS_TYPES);
2031
2032	if (zwork->zw_swork != NULL && zwork->zw_swork->sw_runcmd == 0 &&
2033	    zwork->zw_swork->sw_pidok <= 0) {
2034		warnx(
2035		    "log %s not compressed because daemon(s) not notified",
2036		    zwork->zw_fname);
2037		change_attrs(zwork->zw_fname, zwork->zw_conf);
2038		return;
2039	}
2040
2041	ct = &compress_type[zwork->zw_conf->compress];
2042
2043	/*
2044	 * execv will be called with the array [ program, flags ... ,
2045	 * filename, NULL ] so allocate nflags+3 elements for the array.
2046	 */
2047	args = calloc(ct->nflags + 3, sizeof(*args));
2048	if (args == NULL)
2049		err(1, "calloc");
2050
2051	pgm_path = ct->path;
2052	pgm_name = strrchr(pgm_path, '/');
2053	if (pgm_name == NULL)
2054		pgm_name = pgm_path;
2055	else
2056		pgm_name++;
2057
2058	/* Build the argument array. */
2059	args[0] = pgm_name;
2060	for (c = 0; c < ct->nflags; c++)
2061		args[c + 1] = ct->flags[c];
2062	args[c + 1] = zwork->zw_fname;
2063
2064	/* Also create a space-delimited version if we need to print it. */
2065	if ((command = sbuf_new_auto()) == NULL)
2066		errx(1, "sbuf_new");
2067	sbuf_cpy(command, pgm_path);
2068	for (c = 1; args[c] != NULL; c++) {
2069		sbuf_putc(command, ' ');
2070		sbuf_cat(command, args[c]);
2071	}
2072	if (sbuf_finish(command) == -1)
2073		err(1, "sbuf_finish");
2074
2075	/* Determine the filename of the compressed file. */
2076	asprintf(&zresult, "%s%s", zwork->zw_fname, ct->suffix);
2077	if (zresult == NULL)
2078		errx(1, "asprintf");
2079
2080	if (verbose)
2081		printf("Executing: %s\n", sbuf_data(command));
2082
2083	if (noaction) {
2084		printf("\t%s %s\n", pgm_name, zwork->zw_fname);
2085		change_attrs(zresult, zwork->zw_conf);
2086		goto out;
2087	}
2088
2089	fcount = 1;
2090	pidzip = fork();
2091	while (pidzip < 0) {
2092		/*
2093		 * The fork failed.  If the failure was due to a temporary
2094		 * problem, then wait a short time and try it again.
2095		 */
2096		errsav = errno;
2097		warn("fork() for `%s %s'", pgm_name, zwork->zw_fname);
2098		if (errsav != EAGAIN || fcount > 5)
2099			errx(1, "Exiting...");
2100		sleep(fcount * 12);
2101		fcount++;
2102		pidzip = fork();
2103	}
2104	if (!pidzip) {
2105		/* The child process executes the compression command */
2106		execv(pgm_path, __DECONST(char *const*, args));
2107		err(1, "execv(`%s')", sbuf_data(command));
2108	}
2109
2110	wpid = waitpid(pidzip, &zstatus, 0);
2111	if (wpid == -1) {
2112		/* XXX - should this be a fatal error? */
2113		warn("%s: waitpid(%d)", pgm_path, pidzip);
2114		goto out;
2115	}
2116	if (!WIFEXITED(zstatus)) {
2117		warnx("`%s' did not terminate normally", sbuf_data(command));
2118		goto out;
2119	}
2120	if (WEXITSTATUS(zstatus)) {
2121		warnx("`%s' terminated with a non-zero status (%d)",
2122		    sbuf_data(command), WEXITSTATUS(zstatus));
2123		goto out;
2124	}
2125
2126	/* Compression was successful, set file attributes on the result. */
2127	change_attrs(zresult, zwork->zw_conf);
2128
2129out:
2130	sbuf_delete(command);
2131	free(args);
2132	free(zresult);
2133}
2134
2135/*
2136 * Save information on any process we need to signal.  Any single
2137 * process may need to be sent different signal-values for different
2138 * log files, but usually a single signal-value will cause the process
2139 * to close and re-open all of its log files.
2140 */
2141static struct sigwork_entry *
2142save_sigwork(const struct conf_entry *ent)
2143{
2144	struct sigwork_entry *sprev, *stmp;
2145	int ndiff;
2146	size_t tmpsiz;
2147
2148	sprev = NULL;
2149	ndiff = 1;
2150	SLIST_FOREACH(stmp, &swhead, sw_nextp) {
2151		ndiff = strcmp(ent->pid_cmd_file, stmp->sw_fname);
2152		if (ndiff > 0)
2153			break;
2154		if (ndiff == 0) {
2155			if (ent->sig == stmp->sw_signum)
2156				break;
2157			if (ent->sig > stmp->sw_signum) {
2158				ndiff = 1;
2159				break;
2160			}
2161		}
2162		sprev = stmp;
2163	}
2164	if (stmp != NULL && ndiff == 0)
2165		return (stmp);
2166
2167	tmpsiz = sizeof(struct sigwork_entry) + strlen(ent->pid_cmd_file) + 1;
2168	stmp = malloc(tmpsiz);
2169
2170	stmp->sw_runcmd = 0;
2171	/* If this is a command to run we just set the flag and run command */
2172	if (ent->flags & CE_PID2CMD) {
2173		stmp->sw_pid = -1;
2174		stmp->sw_pidok = 0;
2175		stmp->sw_runcmd = 1;
2176	} else {
2177		set_swpid(stmp, ent);
2178	}
2179	stmp->sw_signum = ent->sig;
2180	strcpy(stmp->sw_fname, ent->pid_cmd_file);
2181	if (sprev == NULL)
2182		SLIST_INSERT_HEAD(&swhead, stmp, sw_nextp);
2183	else
2184		SLIST_INSERT_AFTER(sprev, stmp, sw_nextp);
2185	return (stmp);
2186}
2187
2188/*
2189 * Save information on any file we need to compress.  We may see the same
2190 * file multiple times, so check the full list to avoid duplicates.  The
2191 * list itself is sorted smallest-to-largest, because that's the order we
2192 * want to compress the files.  If the partition is very low on disk space,
2193 * then the smallest files are the most likely to compress, and compressing
2194 * them first will free up more space for the larger files.
2195 */
2196static struct zipwork_entry *
2197save_zipwork(const struct conf_entry *ent, const struct sigwork_entry *swork,
2198    int zsize, const char *zipfname)
2199{
2200	struct zipwork_entry *zprev, *ztmp;
2201	int ndiff;
2202	size_t tmpsiz;
2203
2204	/* Compute the size if the caller did not know it. */
2205	if (zsize < 0)
2206		zsize = sizefile(zipfname);
2207
2208	zprev = NULL;
2209	ndiff = 1;
2210	SLIST_FOREACH(ztmp, &zwhead, zw_nextp) {
2211		ndiff = strcmp(zipfname, ztmp->zw_fname);
2212		if (ndiff == 0)
2213			break;
2214		if (zsize > ztmp->zw_fsize)
2215			zprev = ztmp;
2216	}
2217	if (ztmp != NULL && ndiff == 0)
2218		return (ztmp);
2219
2220	tmpsiz = sizeof(struct zipwork_entry) + strlen(zipfname) + 1;
2221	ztmp = malloc(tmpsiz);
2222	ztmp->zw_conf = ent;
2223	ztmp->zw_swork = swork;
2224	ztmp->zw_fsize = zsize;
2225	strcpy(ztmp->zw_fname, zipfname);
2226	if (zprev == NULL)
2227		SLIST_INSERT_HEAD(&zwhead, ztmp, zw_nextp);
2228	else
2229		SLIST_INSERT_AFTER(zprev, ztmp, zw_nextp);
2230	return (ztmp);
2231}
2232
2233/* Send a signal to the pid specified by pidfile */
2234static void
2235set_swpid(struct sigwork_entry *swork, const struct conf_entry *ent)
2236{
2237	FILE *f;
2238	long minok, maxok, rval;
2239	char *endp, *linep, line[BUFSIZ];
2240
2241	minok = MIN_PID;
2242	maxok = MAX_PID;
2243	swork->sw_pidok = 0;
2244	swork->sw_pid = 0;
2245	swork->sw_pidtype = "daemon";
2246	if (ent->flags & CE_SIGNALGROUP) {
2247		/*
2248		 * If we are expected to signal a process-group when
2249		 * rotating this logfile, then the value read in should
2250		 * be the negative of a valid process ID.
2251		 */
2252		minok = -MAX_PID;
2253		maxok = -MIN_PID;
2254		swork->sw_pidtype = "process-group";
2255	}
2256
2257	f = fopen(ent->pid_cmd_file, "r");
2258	if (f == NULL) {
2259		if (errno == ENOENT && enforcepid == 0) {
2260			/*
2261			 * Warn if the PID file doesn't exist, but do
2262			 * not consider it an error.  Most likely it
2263			 * means the process has been terminated,
2264			 * so it should be safe to rotate any log
2265			 * files that the process would have been using.
2266			 */
2267			swork->sw_pidok = 1;
2268			warnx("pid file doesn't exist: %s", ent->pid_cmd_file);
2269		} else
2270			warn("can't open pid file: %s", ent->pid_cmd_file);
2271		return;
2272	}
2273
2274	if (fgets(line, BUFSIZ, f) == NULL) {
2275		/*
2276		 * Warn if the PID file is empty, but do not consider
2277		 * it an error.  Most likely it means the process has
2278		 * has terminated, so it should be safe to rotate any
2279		 * log files that the process would have been using.
2280		 */
2281		if (feof(f) && enforcepid == 0) {
2282			swork->sw_pidok = 1;
2283			warnx("pid/cmd file is empty: %s", ent->pid_cmd_file);
2284		} else
2285			warn("can't read from pid file: %s", ent->pid_cmd_file);
2286		(void)fclose(f);
2287		return;
2288	}
2289	(void)fclose(f);
2290
2291	errno = 0;
2292	linep = line;
2293	while (*linep == ' ')
2294		linep++;
2295	rval = strtol(linep, &endp, 10);
2296	if (*endp != '\0' && !isspacech(*endp)) {
2297		warnx("pid file does not start with a valid number: %s",
2298		    ent->pid_cmd_file);
2299	} else if (rval < minok || rval > maxok) {
2300		warnx("bad value '%ld' for process number in %s",
2301		    rval, ent->pid_cmd_file);
2302		if (verbose)
2303			warnx("\t(expecting value between %ld and %ld)",
2304			    minok, maxok);
2305	} else {
2306		swork->sw_pidok = 1;
2307		swork->sw_pid = rval;
2308	}
2309
2310	return;
2311}
2312
2313/* Log the fact that the logs were turned over */
2314static int
2315log_trim(const char *logname, const struct conf_entry *log_ent)
2316{
2317	FILE *f;
2318	const char *xtra;
2319
2320	if ((f = fopen(logname, "a")) == NULL)
2321		return (-1);
2322	xtra = "";
2323	if (log_ent->def_cfg)
2324		xtra = " using <default> rule";
2325	if (log_ent->flags & CE_RFC5424) {
2326		if (log_ent->firstcreate) {
2327			fprintf(f, "<%d>1 %s %s newsyslog %d - - %s%s\n",
2328			    LOG_MAKEPRI(LOG_USER, LOG_INFO),
2329			    daytime_rfc5424, hostname, getpid(),
2330			    "logfile first created", xtra);
2331		} else if (log_ent->r_reason != NULL) {
2332			fprintf(f, "<%d>1 %s %s newsyslog %d - - %s%s%s\n",
2333			    LOG_MAKEPRI(LOG_USER, LOG_INFO),
2334			    daytime_rfc5424, hostname, getpid(),
2335			    "logfile turned over", log_ent->r_reason, xtra);
2336		} else {
2337			fprintf(f, "<%d>1 %s %s newsyslog %d - - %s%s\n",
2338			    LOG_MAKEPRI(LOG_USER, LOG_INFO),
2339			    daytime_rfc5424, hostname, getpid(),
2340			    "logfile turned over", xtra);
2341		}
2342	} else {
2343		if (log_ent->firstcreate)
2344			fprintf(f,
2345			    "%s %.*s newsyslog[%d]: logfile first created%s\n",
2346			    daytime, (int)hostname_shortlen, hostname, getpid(),
2347			    xtra);
2348		else if (log_ent->r_reason != NULL)
2349			fprintf(f,
2350			    "%s %.*s newsyslog[%d]: logfile turned over%s%s\n",
2351			    daytime, (int)hostname_shortlen, hostname, getpid(),
2352			    log_ent->r_reason, xtra);
2353		else
2354			fprintf(f,
2355			    "%s %.*s newsyslog[%d]: logfile turned over%s\n",
2356			    daytime, (int)hostname_shortlen, hostname, getpid(),
2357			    xtra);
2358	}
2359	if (fclose(f) == EOF)
2360		err(1, "log_trim: fclose");
2361	return (0);
2362}
2363
2364/* Return size in kilobytes of a file */
2365static int
2366sizefile(const char *file)
2367{
2368	struct stat sb;
2369
2370	if (stat(file, &sb) < 0)
2371		return (-1);
2372	return (kbytes(sb.st_size));
2373}
2374
2375/*
2376 * Return the mtime of the most recent archive of the logfile, using timestamp
2377 * based filenames.
2378 */
2379static time_t
2380mtime_old_timelog(const char *file)
2381{
2382	struct stat sb;
2383	struct tm tm;
2384	int dir_fd;
2385	time_t t;
2386	struct dirent *dp;
2387	DIR *dirp;
2388	char *logfname, *logfnamebuf, *dir, *dirbuf;
2389
2390	t = -1;
2391
2392	if ((dirbuf = strdup(file)) == NULL) {
2393		warn("strdup() of '%s'", file);
2394		return (t);
2395	}
2396	dir = dirname(dirbuf);
2397	if ((logfnamebuf = strdup(file)) == NULL) {
2398		warn("strdup() of '%s'", file);
2399		free(dirbuf);
2400		return (t);
2401	}
2402	logfname = basename(logfnamebuf);
2403	if (logfname[0] == '/') {
2404		warnx("Invalid log filename '%s'", logfname);
2405		goto out;
2406	}
2407
2408	if ((dirp = opendir(dir)) == NULL) {
2409		warn("Cannot open log directory '%s'", dir);
2410		goto out;
2411	}
2412	dir_fd = dirfd(dirp);
2413	/* Open the archive dir and find the most recent archive of logfname. */
2414	while ((dp = readdir(dirp)) != NULL) {
2415		if (validate_old_timelog(dir_fd, dp, logfname, &tm) == 0)
2416			continue;
2417
2418		if (fstatat(dir_fd, dp->d_name, &sb, AT_SYMLINK_NOFOLLOW) == -1) {
2419			warn("Cannot stat '%s'", file);
2420			continue;
2421		}
2422		if (t < sb.st_mtime)
2423			t = sb.st_mtime;
2424	}
2425	closedir(dirp);
2426
2427out:
2428	free(dirbuf);
2429	free(logfnamebuf);
2430	return (t);
2431}
2432
2433/* Return the age in hours of the most recent archive of the logfile. */
2434static int
2435age_old_log(const char *file)
2436{
2437	struct stat sb;
2438	const char *logfile_suffix;
2439	static unsigned int suffix_maxlen = 0;
2440	char *tmp;
2441	size_t tmpsiz;
2442	time_t mtime;
2443	int c;
2444
2445	if (suffix_maxlen == 0) {
2446		for (c = 0; c < COMPRESS_TYPES; c++)
2447			suffix_maxlen = MAX(suffix_maxlen,
2448			    strlen(compress_type[c].suffix));
2449	}
2450
2451	tmpsiz = MAXPATHLEN + sizeof(".0") + suffix_maxlen + 1;
2452	tmp = alloca(tmpsiz);
2453
2454	if (archtodir) {
2455		char *p;
2456
2457		/* build name of archive directory into tmp */
2458		if (*archdirname == '/') {	/* absolute */
2459			strlcpy(tmp, archdirname, tmpsiz);
2460		} else {	/* relative */
2461			/* get directory part of logfile */
2462			strlcpy(tmp, file, tmpsiz);
2463			if ((p = strrchr(tmp, '/')) == NULL)
2464				tmp[0] = '\0';
2465			else
2466				*(p + 1) = '\0';
2467			strlcat(tmp, archdirname, tmpsiz);
2468		}
2469
2470		strlcat(tmp, "/", tmpsiz);
2471
2472		/* get filename part of logfile */
2473		if ((p = strrchr(file, '/')) == NULL)
2474			strlcat(tmp, file, tmpsiz);
2475		else
2476			strlcat(tmp, p + 1, tmpsiz);
2477	} else {
2478		(void) strlcpy(tmp, file, tmpsiz);
2479	}
2480
2481	if (timefnamefmt != NULL) {
2482		mtime = mtime_old_timelog(tmp);
2483		if (mtime == -1)
2484			return (-1);
2485	} else {
2486		strlcat(tmp, ".0", tmpsiz);
2487		logfile_suffix = get_logfile_suffix(tmp);
2488		if (logfile_suffix == NULL)
2489			return (-1);
2490		(void) strlcat(tmp, logfile_suffix, tmpsiz);
2491		if (stat(tmp, &sb) < 0)
2492			return (-1);
2493		mtime = sb.st_mtime;
2494	}
2495
2496	return ((int)(ptimeget_secs(timenow) - mtime + 1800) / 3600);
2497}
2498
2499/* Skip Over Blanks */
2500static char *
2501sob(char *p)
2502{
2503	while (p && *p && isspace(*p))
2504		p++;
2505	return (p);
2506}
2507
2508/* Skip Over Non-Blanks */
2509static char *
2510son(char *p)
2511{
2512	while (p && *p && !isspace(*p))
2513		p++;
2514	return (p);
2515}
2516
2517/* Check if string is actually a number */
2518static int
2519isnumberstr(const char *string)
2520{
2521	while (*string) {
2522		if (!isdigitch(*string++))
2523			return (0);
2524	}
2525	return (1);
2526}
2527
2528/* Check if string contains a glob */
2529static int
2530isglobstr(const char *string)
2531{
2532	char chr;
2533
2534	while ((chr = *string++)) {
2535		if (chr == '*' || chr == '?' || chr == '[')
2536			return (1);
2537	}
2538	return (0);
2539}
2540
2541/*
2542 * Save the active log file under a new name.  A link to the new name
2543 * is the quick-and-easy way to do this.  If that fails (which it will
2544 * if the destination is on another partition), then make a copy of
2545 * the file to the new location.
2546 */
2547static void
2548savelog(char *from, char *to)
2549{
2550	FILE *src, *dst;
2551	int c, res;
2552
2553	res = link(from, to);
2554	if (res == 0)
2555		return;
2556
2557	if ((src = fopen(from, "r")) == NULL)
2558		err(1, "can't fopen %s for reading", from);
2559	if ((dst = fopen(to, "w")) == NULL)
2560		err(1, "can't fopen %s for writing", to);
2561
2562	while ((c = getc(src)) != EOF) {
2563		if ((putc(c, dst)) == EOF)
2564			err(1, "error writing to %s", to);
2565	}
2566
2567	if (ferror(src))
2568		err(1, "error reading from %s", from);
2569	if ((fclose(src)) != 0)
2570		err(1, "can't fclose %s", to);
2571	if ((fclose(dst)) != 0)
2572		err(1, "can't fclose %s", from);
2573}
2574
2575/* create one or more directory components of a path */
2576static void
2577createdir(const struct conf_entry *ent, char *dirpart)
2578{
2579	int res;
2580	char *s, *d;
2581	char mkdirpath[MAXPATHLEN];
2582	struct stat st;
2583
2584	s = dirpart;
2585	d = mkdirpath;
2586
2587	for (;;) {
2588		*d++ = *s++;
2589		if (*s != '/' && *s != '\0')
2590			continue;
2591		*d = '\0';
2592		res = lstat(mkdirpath, &st);
2593		if (res != 0) {
2594			if (noaction) {
2595				printf("\tmkdir %s\n", mkdirpath);
2596			} else {
2597				res = mkdir(mkdirpath, 0755);
2598				if (res != 0)
2599					err(1, "Error on mkdir(\"%s\") for -a",
2600					    mkdirpath);
2601			}
2602		}
2603		if (*s == '\0')
2604			break;
2605	}
2606	if (verbose) {
2607		if (ent->firstcreate)
2608			printf("Created directory '%s' for new %s\n",
2609			    dirpart, ent->log);
2610		else
2611			printf("Created directory '%s' for -a\n", dirpart);
2612	}
2613}
2614
2615/*
2616 * Create a new log file, destroying any currently-existing version
2617 * of the log file in the process.  If the caller wants a backup copy
2618 * of the file to exist, they should call 'link(logfile,logbackup)'
2619 * before calling this routine.
2620 */
2621void
2622createlog(const struct conf_entry *ent)
2623{
2624	int fd, failed;
2625	struct stat st;
2626	char *realfile, *slash, tempfile[MAXPATHLEN];
2627
2628	fd = -1;
2629	realfile = ent->log;
2630
2631	/*
2632	 * If this log file is being created for the first time (-C option),
2633	 * then it may also be true that the parent directory does not exist
2634	 * yet.  Check, and create that directory if it is missing.
2635	 */
2636	if (ent->firstcreate) {
2637		strlcpy(tempfile, realfile, sizeof(tempfile));
2638		slash = strrchr(tempfile, '/');
2639		if (slash != NULL) {
2640			*slash = '\0';
2641			failed = stat(tempfile, &st);
2642			if (failed && errno != ENOENT)
2643				err(1, "Error on stat(%s)", tempfile);
2644			if (failed)
2645				createdir(ent, tempfile);
2646			else if (!S_ISDIR(st.st_mode))
2647				errx(1, "%s exists but is not a directory",
2648				    tempfile);
2649		}
2650	}
2651
2652	/*
2653	 * First create an unused filename, so it can be chown'ed and
2654	 * chmod'ed before it is moved into the real location.  mkstemp
2655	 * will create the file mode=600 & owned by us.  Note that all
2656	 * temp files will have a suffix of '.z<something>'.
2657	 */
2658	strlcpy(tempfile, realfile, sizeof(tempfile));
2659	strlcat(tempfile, ".zXXXXXX", sizeof(tempfile));
2660	if (noaction)
2661		printf("\tmktemp %s\n", tempfile);
2662	else {
2663		fd = mkstemp(tempfile);
2664		if (fd < 0)
2665			err(1, "can't mkstemp logfile %s", tempfile);
2666
2667		/*
2668		 * Add status message to what will become the new log file.
2669		 */
2670		if (!(ent->flags & CE_BINARY)) {
2671			if (log_trim(tempfile, ent))
2672				err(1, "can't add status message to log");
2673		}
2674	}
2675
2676	/* Change the owner/group, if we are supposed to */
2677	if (ent->uid != (uid_t)-1 || ent->gid != (gid_t)-1) {
2678		if (noaction)
2679			printf("\tchown %u:%u %s\n", ent->uid, ent->gid,
2680			    tempfile);
2681		else {
2682			failed = fchown(fd, ent->uid, ent->gid);
2683			if (failed)
2684				err(1, "can't fchown temp file %s", tempfile);
2685		}
2686	}
2687
2688	/* Turn on NODUMP if it was requested in the config-file. */
2689	if (ent->flags & CE_NODUMP) {
2690		if (noaction)
2691			printf("\tchflags nodump %s\n", tempfile);
2692		else {
2693			failed = fchflags(fd, UF_NODUMP);
2694			if (failed) {
2695				warn("log_trim: fchflags(NODUMP)");
2696			}
2697		}
2698	}
2699
2700	/*
2701	 * Note that if the real logfile still exists, and if the call
2702	 * to rename() fails, then "neither the old file nor the new
2703	 * file shall be changed or created" (to quote the standard).
2704	 * If the call succeeds, then the file will be replaced without
2705	 * any window where some other process might find that the file
2706	 * did not exist.
2707	 * XXX - ? It may be that for some error conditions, we could
2708	 *	retry by first removing the realfile and then renaming.
2709	 */
2710	if (noaction) {
2711		printf("\tchmod %o %s\n", ent->permissions, tempfile);
2712		printf("\tmv %s %s\n", tempfile, realfile);
2713	} else {
2714		failed = fchmod(fd, ent->permissions);
2715		if (failed)
2716			err(1, "can't fchmod temp file '%s'", tempfile);
2717		failed = rename(tempfile, realfile);
2718		if (failed)
2719			err(1, "can't mv %s to %s", tempfile, realfile);
2720	}
2721
2722	if (fd >= 0)
2723		close(fd);
2724}
2725
2726/*
2727 * Change the attributes of a given filename to what was specified in
2728 * the newsyslog.conf entry.  This routine is only called for files
2729 * that newsyslog expects that it has created, and thus it is a fatal
2730 * error if this routine finds that the file does not exist.
2731 */
2732static void
2733change_attrs(const char *fname, const struct conf_entry *ent)
2734{
2735	int failed;
2736
2737	if (noaction) {
2738		printf("\tchmod %o %s\n", ent->permissions, fname);
2739
2740		if (ent->uid != (uid_t)-1 || ent->gid != (gid_t)-1)
2741			printf("\tchown %u:%u %s\n",
2742			    ent->uid, ent->gid, fname);
2743
2744		if (ent->flags & CE_NODUMP)
2745			printf("\tchflags nodump %s\n", fname);
2746		return;
2747	}
2748
2749	failed = chmod(fname, ent->permissions);
2750	if (failed) {
2751		if (errno != EPERM)
2752			err(1, "chmod(%s) in change_attrs", fname);
2753		warn("change_attrs couldn't chmod(%s)", fname);
2754	}
2755
2756	if (ent->uid != (uid_t)-1 || ent->gid != (gid_t)-1) {
2757		failed = chown(fname, ent->uid, ent->gid);
2758		if (failed)
2759			warn("can't chown %s", fname);
2760	}
2761
2762	if (ent->flags & CE_NODUMP) {
2763		failed = chflags(fname, UF_NODUMP);
2764		if (failed)
2765			warn("can't chflags %s NODUMP", fname);
2766	}
2767}
2768
2769/*
2770 * Parse a signal number or signal name. Returns the signal number parsed or -1
2771 * on failure.
2772 */
2773static int
2774parse_signal(const char *str)
2775{
2776	int sig, i;
2777	const char *errstr;
2778
2779	sig = strtonum(str, 1, sys_nsig - 1, &errstr);
2780
2781	if (errstr == NULL)
2782		return (sig);
2783	if (strncasecmp(str, "SIG", 3) == 0)
2784		str += 3;
2785
2786	for (i = 1; i < sys_nsig; i++) {
2787		if (strcasecmp(str, sys_signame[i]) == 0)
2788			return (i);
2789	}
2790
2791	return (-1);
2792}
2793