xref: /illumos-gate/usr/src/cmd/mailx/hdr/def.h (revision 500cf85b)
1 /*
2  * CDDL HEADER START
3  *
4  * The contents of this file are subject to the terms of the
5  * Common Development and Distribution License (the "License").
6  * You may not use this file except in compliance with the License.
7  *
8  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9  * or http://www.opensolaris.org/os/licensing.
10  * See the License for the specific language governing permissions
11  * and limitations under the License.
12  *
13  * When distributing Covered Code, include this CDDL HEADER in each
14  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15  * If applicable, add the following below this CDDL HEADER, with the
16  * fields enclosed by brackets "[]" replaced with your own identifying
17  * information: Portions Copyright [yyyy] [name of copyright owner]
18  *
19  * CDDL HEADER END
20  */
21 
22 /*
23  * Copyright 2018 Joyent, Inc.
24  */
25 
26 /*
27  * Copyright (c) 1985, 2010, Oracle and/or its affiliates. All rights reserved.
28  * Copyright (c) 2016 by Delphix. All rights reserved.
29  */
30 
31 /*	Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T */
32 /*	All Rights Reserved   */
33 
34 /*
35  * University Copyright- Copyright (c) 1982, 1986, 1988
36  * The Regents of the University of California
37  * All Rights Reserved
38  *
39  * University Acknowledgment- Portions of this document are derived from
40  * software developed by the University of California, Berkeley, and its
41  * contributors.
42  */
43 
44 #ifndef _MAILX_DEF_H
45 #define	_MAILX_DEF_H
46 
47 #ifdef	__cplusplus
48 extern "C" {
49 #endif
50 
51 #include <sys/types.h>
52 #include <signal.h>
53 #include <stdio.h>
54 #include <fcntl.h>
55 #include <string.h>
56 #include <termio.h>
57 #include <setjmp.h>
58 #include <time.h>
59 #include <sys/stat.h>
60 #include <maillock.h>
61 #include <ctype.h>
62 #include <errno.h>
63 #ifndef preSVr4
64 #include <unistd.h>
65 #include <stdlib.h>
66 #include <ulimit.h>
67 #include <wait.h>
68 #include <libcustr.h>
69 #endif
70 #ifdef VMUNIX
71 #include <sys/wait.h>
72 #endif
73 #include "local.h"
74 #include "uparm.h"
75 
76 /*
77  * mailx -- a modified version of a University of California at Berkeley
78  *	mail program
79  */
80 
81 #define	SENDESC		'~'		/* Default escape for sending */
82 #define	NMLSIZE		1024		/* max names in a message list */
83 #define	PATHSIZE	1024		/* Size of pathnames throughout */
84 #define	HSHSIZE		59		/* Hash size for aliases and vars */
85 #define	HDRFIELDS	3		/* Number of header fields */
86 #define	LINESIZE	5120		/* max readable line width */
87 #define	STRINGSIZE	((unsigned)128) /* Dynamic allocation units */
88 #define	MAXARGC		1024		/* Maximum list of raw strings */
89 #define	NOSTR		((char *)0)	/* Nill string pointer */
90 #define	NOSTRPTR	((char **)0)	/* Nill pointer to string pointer */
91 #define	NOINTPTR	((int *)0)	/* Nill pointer */
92 #define	MAXEXP		25		/* Maximum expansion of aliases */
93 
94 /* A nice function to string compare */
95 #define	equal(a, b)	(strcmp(a, b) == 0)
96 
97 /* Keep a list of all opened files */
98 #define	fopen(s, t)	my_fopen(s, t)
99 
100 /* Delete closed file from the list */
101 #define	fclose(s)	my_fclose(s)
102 
103 struct message {
104 	off_t	m_offset;		/* offset in block of message */
105 	long	m_size;			/* Bytes in the message */
106 	long	m_lines;		/* Lines in the message */
107 	long	m_clen;			/* Content-Length of the mesg   */
108 	short	m_flag;			/* flags, see below */
109 	char	m_text;			/* TRUE if the contents is text */
110 					/* False otherwise		*/
111 };
112 
113 typedef struct fplst {
114 	FILE	*fp;
115 	struct	fplst	*next;
116 } NODE;
117 
118 /*
119  * flag bits.
120  */
121 
122 #define	MUSED		(1<<0)		/* entry is used, but this bit isn't */
123 #define	MDELETED	(1<<1)		/* entry has been deleted */
124 #define	MSAVED		(1<<2)		/* entry has been saved */
125 #define	MTOUCH		(1<<3)		/* entry has been noticed */
126 #define	MPRESERVE	(1<<4)		/* keep entry in sys mailbox */
127 #define	MMARK		(1<<5)		/* message is marked! */
128 #define	MODIFY		(1<<6)		/* message has been modified */
129 #define	MNEW		(1<<7)		/* message has never been seen */
130 #define	MREAD		(1<<8)		/* message has been read sometime. */
131 #define	MSTATUS		(1<<9)		/* message status has changed */
132 #define	MBOX		(1<<10)		/* Send this to mbox, regardless */
133 #define	MBOXED		(1<<11)		/* message has been sent to mbox */
134 
135 #define	H_AFWDCNT	1		/* "Auto-Forward-Count:"  */
136 #define	H_AFWDFROM	2		/* "Auto-Forwarded-From:" */
137 #define	H_CLEN		3		/* "Content-Length:"	*/
138 #define	H_CTYPE		4		/* "Content-Type:"	*/
139 #define	H_DATE		5		/* "Date:"		*/
140 #define	H_DEFOPTS	6		/* "Default-Options:"	*/
141 #define	H_EOH		7		/* "End-of-Header:"	*/
142 #define	H_FROM		8		/* "From "		*/
143 #define	H_FROM1		9		/* ">From "		*/
144 #define	H_FROM2		10		/* "From: "		*/
145 #define	H_MTSID		11		/* "MTS-Message-ID:"	*/
146 #define	H_MTYPE		12		/* "Message-Type:"	*/
147 #define	H_MVERS		13		/* "Message-Version:"	*/
148 #define	H_MSVC		14		/* "Message-Service:"	*/
149 #define	H_RECEIVED	15		/* "Received:"		*/
150 #define	H_RVERS		16		/* "Report-Version:"	*/
151 #define	H_STATUS	17		/* "Status:"		*/
152 #define	H_SUBJ		18		/* "Subject:"		*/
153 #define	H_TO		19		/* "To:"		*/
154 #define	H_TCOPY		20		/* ">To:"		*/
155 #define	H_TROPTS	21		/* "Transport-Options:"   */
156 #define	H_UAID		22		/* "UA-Content-ID:"	  */
157 
158 #define	H_DAFWDFROM	23	/* Hold A-F-F when sending Del. Notf. */
159 #define	H_DTCOPY	24	/* Hold ">To:" when sending Del. Notf. */
160 #define	H_DRECEIVED	25	/* Hold Rcvd: when sending Del. Notf. */
161 #define	H_CONT		26	/* Continuation of previous line */
162 #define	H_NAMEVALUE	27	/* unrecognized "name: value" hdr line */
163 
164 /*
165  * Format of the command description table.
166  * The actual table is declared and initialized
167  * in lex.c
168  */
169 
170 struct cmd {
171 	char	*c_name;		/* Name of command */
172 	int	(*c_func)(void *);	/* Implementor of the command */
173 	short	c_argtype;		/* Type of arglist (see below) */
174 	short	c_msgflag;		/* Required flags of messages */
175 	short	c_msgmask;		/* Relevant flags of messages */
176 };
177 
178 /* can't initialize unions */
179 
180 #define	c_minargs c_msgflag		/* Minimum argcount for RAWLIST */
181 #define	c_maxargs c_msgmask		/* Max argcount for RAWLIST */
182 
183 /*
184  * Argument types.
185  */
186 
187 #define	MSGLIST	 0		/* Message list type */
188 #define	STRLIST	 1		/* A pure string */
189 #define	RAWLIST	 2		/* Shell string list */
190 #define	NOLIST	 3		/* Just plain 0 */
191 #define	NDMLIST	 4		/* Message list, no defaults */
192 
193 #define	P	040		/* Autoprint dot after command */
194 #define	I	0100		/* Interactive command bit */
195 #define	M	0200		/* Legal from send mode bit */
196 #define	W	0400		/* Illegal when read only bit */
197 #define	F	01000		/* Is a conditional command */
198 #define	T	02000		/* Is a transparent command */
199 #define	R	04000		/* Cannot be called from collect */
200 
201 /*
202  * Oft-used mask values
203  */
204 
205 #define	MMNORM	(MDELETED|MSAVED) /* Look at both save and delete bits */
206 #define	MMNDEL	MDELETED	/* Look only at deleted bit */
207 
208 /*
209  * Structure used to return a break down of a head
210  * line
211  */
212 
213 typedef struct headline {
214 	custr_t	*hl_from;	/* The name of the sender */
215 	custr_t	*hl_tty;	/* Its tty string (if any) */
216 	custr_t	*hl_date;	/* The entire date string */
217 } headline_t;
218 
219 #define	GTO	1		/* Grab To: line */
220 #define	GSUBJECT 2		/* Likewise, Subject: line */
221 #define	GCC	4		/* And the Cc: line */
222 #define	GBCC	8		/* And also the Bcc: line */
223 #define	GDEFOPT	16		/* And the Default-Options: lines */
224 #define	GNL	32		/* Print blank line after */
225 #define	GOTHER	64		/* Other header lines */
226 #define	GMASK	(GTO|GSUBJECT|GCC|GBCC|GDEFOPT|GNL|GOTHER)
227 				/* Mask of all header lines */
228 #define	GDEL	128		/* Entity removed from list */
229 #define	GCLEN	256		/* Include Content-Length header */
230 
231 /*
232  * Structure used to pass about the current
233  * state of the user-typed message header.
234  */
235 
236 struct header {
237 	char	*h_to;			/* Dynamic "To:" string */
238 	char	*h_subject;		/* Subject string */
239 	char	*h_cc;			/* Carbon copies string */
240 	char	*h_bcc;			/* Blind carbon copies */
241 	char	*h_defopt;		/* Default options */
242 	char	**h_others;		/* Other header lines */
243 	int	h_seq;			/* Sequence for optimization */
244 };
245 
246 /*
247  * Structure of namelist nodes used in processing
248  * the recipients of mail and aliases and all that
249  * kind of stuff.
250  */
251 
252 struct name {
253 	struct	name *n_flink;		/* Forward link in list. */
254 	struct	name *n_blink;		/* Backward list link */
255 	short	n_type;			/* From which list it came */
256 	char	*n_name;		/* This fella's name */
257 	char	*n_full;		/* Full name */
258 };
259 
260 /*
261  * Structure of a variable node.  All variables are
262  * kept on a singly-linked list of these, rooted by
263  * "variables"
264  */
265 
266 struct var {
267 	struct	var *v_link;		/* Forward link to next variable */
268 	char	*v_name;		/* The variable's name */
269 	char	*v_value;		/* And it's current value */
270 };
271 
272 struct mgroup {
273 	struct	mgroup *ge_link;	/* Next person in this group */
274 	char	*ge_name;		/* This person's user name */
275 };
276 
277 struct grouphead {
278 	struct	grouphead *g_link;	/* Next grouphead in list */
279 	char	*g_name;		/* Name of this group */
280 	struct	mgroup *g_list;		/* Users in group. */
281 };
282 
283 #define	NIL	((struct name *)0)	/* The nil pointer for namelists */
284 #define	NONE	((struct cmd *)0)	/* The nil pointer to command tab */
285 #define	NOVAR	((struct var *)0)	/* The nil pointer to variables */
286 #define	NOGRP	((struct grouphead *)0) /* The nil grouphead pointer */
287 #define	NOGE	((struct mgroup *)0)	/* The nil group pointer */
288 #define	NOFP	((struct fplst *)0)	/* The nil file pointer */
289 
290 #define	TRUE	1
291 #define	FALSE	0
292 
293 #define	DEADPERM	0600		/* permissions of dead.letter */
294 #define	TEMPPERM	0600		/* permissions of temp files */
295 #define	MBOXPERM	0600		/* permissions of ~/mbox */
296 
297 #ifndef	MFMODE
298 #define	MFMODE		0600		/* create mode for `/var/mail' files */
299 #endif
300 
301 /*
302  * Structure of the hash table of ignored header fields
303  */
304 struct ignore {
305 	struct ignore	*i_link;	/* Next ignored field in bucket */
306 	char		*i_field;	/* This ignored field */
307 };
308 
309 #ifdef preSVr4
310 struct utimbuf {
311 	time_t	actime;
312 	time_t	modtime;
313 };
314 #else
315 #include	<utime.h>
316 #endif
317 
318 /*
319  * Token values returned by the scanner used for argument lists.
320  * Also, sizes of scanner-related things.
321  */
322 
323 #define	TEOL		0		/* End of the command line */
324 #define	TNUMBER		1		/* A message number */
325 #define	TDASH		2		/* A simple dash */
326 #define	TSTRING		3		/* A string (possibly containing -) */
327 #define	TDOT		4		/* A "." */
328 #define	TUP		5		/* An "^" */
329 #define	TDOLLAR		6		/* A "$" */
330 #define	TSTAR		7		/* A "*" */
331 #define	TOPEN		8		/* An '(' */
332 #define	TCLOSE		9		/* A ')' */
333 #define	TPLUS		10		/* A '+' */
334 
335 #define	REGDEP		2		/* Maximum regret depth. */
336 #define	STRINGLEN	1024		/* Maximum length of string token */
337 
338 /*
339  * Constants for conditional commands.  These describe whether
340  * we should be executing stuff or not.
341  */
342 
343 #define	CANY		0		/* Execute in send or receive mode */
344 #define	CRCV		1		/* Execute in receive mode only */
345 #define	CSEND		2		/* Execute in send mode only */
346 #define	CTTY		3		/* Execute if attached to a tty only */
347 #define	CNOTTY		4		/* Execute if not attached to a tty */
348 
349 /*
350  * Flags for msend().
351  */
352 
353 #define	M_IGNORE	1		/* Do "ignore/retain" processing */
354 #define	M_SAVING	2		/* Saving to a file/folder */
355 
356 /*
357  * VM/UNIX has a vfork system call which is faster than forking.  If we
358  * don't have it, fork(2) will do . . .
359  */
360 
361 #if !defined(VMUNIX) && defined(preSVr4)
362 #define	vfork()	fork()
363 #endif
364 #ifndef	SIGRETRO
365 #define	sigchild()
366 #endif
367 
368 
369 /*
370  * 4.2bsd signal interface help...
371  */
372 #ifdef VMUNIX
373 #define	sigset(s, a)	signal(s, a)
374 #define	sigsys(s, a)	signal(s, a)
375 #else
376 #ifndef preSVr4
377 /* SVr4 version of sigset() in fio.c */
378 #define	sigsys(s, a)	signal(s, a)
379 #define	setjmp(x)	sigsetjmp((x), 1)
380 #define	longjmp		siglongjmp
381 #define	jmp_buf		sigjmp_buf
382 #else
383 #define	OLD_BSD_SIGS
384 #endif
385 #endif
386 
387 /*
388  * Truncate a file to the last character written. This is
389  * useful just before closing an old file that was opened
390  * for read/write.
391  */
392 #define	trunc(stream)	ftruncate(fileno(stream), (long)ftell(stream))
393 
394 /*
395  * The pointers for the string allocation routines,
396  * there are NSPACE independent areas.
397  * The first holds STRINGSIZE bytes, the next
398  * twice as much, and so on.
399  */
400 
401 #define	NSPACE	25			/* Total number of string spaces */
402 struct strings {
403 	char	*s_topFree;		/* Beginning of this area */
404 	char	*s_nextFree;		/* Next alloctable place here */
405 	unsigned s_nleft;		/* Number of bytes left here */
406 };
407 
408 /* The following typedefs must be used in SVR4 */
409 #ifdef preSVr4
410 #ifndef sun
411 typedef int gid_t;
412 typedef int uid_t;
413 typedef int mode_t;
414 typedef int pid_t;
415 #endif
416 #endif
417 
418 #define	STSIZ	40
419 #define	TMPSIZ	14
420 /*
421  * Forward declarations of routine types to keep lint and cc happy.
422  */
423 
424 extern int		Copy(int *msgvec);
425 extern FILE		*Fdopen(int fildes, char *mode);
426 extern int		Followup(int *msgvec);
427 extern char		*Getf(register char *s);
428 extern int		More(int *msgvec);
429 extern int		Respond(int *msgvec);
430 extern int		Save(int *msgvec);
431 extern int		Sendm(char *str);
432 extern int		Sput(char str[]);
433 extern int		Type(int *msgvec);
434 extern void		Verhogen(void);
435 extern char		*addone(char hf[], char news[]);
436 extern char		*addto(char hf[], char news[]);
437 extern void		alter(char name[]);
438 extern int		alternates(char **namelist);
439 extern void		announce(void);
440 extern int		any(int ch, char *str);
441 extern int		anyof(register char *s1, register char *s2);
442 extern int		argcount(char **argv);
443 extern void		assign(char name[], char value[]);
444 extern int		blankline(const char linebuf[]);
445 extern struct name	*cat(struct name *n1, struct name *n2);
446 extern FILE		*collect(struct header *hp);
447 extern void		commands(void);
448 extern char		*copy(char *str1, char *str2);
449 extern int		copycmd(char str[]);
450 extern int		deassign(register char *s);
451 extern int		delm(int *msgvec);
452 extern struct name	*delname(register struct name *np, char name[]);
453 extern int		deltype(int msgvec[]);
454 extern char		*detract(register struct name *np, int ntype);
455 extern int		docomma(char *s);
456 extern int		dopipe(char str[]);
457 extern int		dosh(char *str);
458 extern int		echo(register char **argv);
459 extern int		editor(int *msgvec);
460 extern int		edstop(int noremove);
461 extern struct name	*elide(struct name *names);
462 extern int		elsecmd(void);
463 extern int		endifcmd(void);
464 extern int		execute(char linebuf[], int contxt);
465 extern char		*expand(char *name);
466 extern struct name	*extract(char line[], int arg_ntype);
467 extern int		fferror(FILE *iob);
468 extern int		field(char str[]);
469 extern int		file(char **argv);
470 extern struct grouphead	*findgroup(char name[]);
471 extern void		findmail(char *name);
472 extern int		first(int f, int m);
473 extern void		flush(void);
474 extern int		folders(char **arglist);
475 extern int		followup(int *msgvec);
476 extern int		from(int *msgvec);
477 extern off_t		fsize(FILE *iob);
478 extern int		getfold(char *name);
479 extern int	gethfield(register FILE *f, char linebuf[], register long rem);
480 extern int	getaline(char *line, int size, FILE *f, int *hasnulls);
481 extern int	getmessage(char *buf, int *vector, int flags);
482 extern int	getmsglist(char *buf, int *vector, int flags);
483 extern int	getname(uid_t uid, char namebuf[]);
484 extern int	getrawlist(char line[], char **argv, int argc);
485 extern void	getrecf(char *buf, char *recfile,
486 		    int useauthor, int sz_recfile);
487 extern uid_t	getuserid(char name[]);
488 extern int	grabh(register struct header *hp, int gflags, int subjtop);
489 extern int	group(char **argv);
490 extern void	hangup(int);
491 extern int	hash(char name[]);
492 extern char	*hcontents(char hfield[]);
493 extern int	headerp(register char *line);
494 extern int	headers(int *msgvec);
495 extern int	headline_alloc(headline_t **);
496 extern void	headline_free(headline_t *);
497 extern void	headline_reset(headline_t *);
498 extern int	help(void);
499 extern char	*helppath(char *file);
500 extern char	*hfield(char field[], struct message *mp,
501 		    char *(*add)(char *, char *));
502 extern void	holdsigs(void);
503 extern int	icequal(register char *s1, register char *s2);
504 extern int	ifcmd(char **argv);
505 extern int	igfield(char *list[]);
506 extern int	inc(void);
507 extern void	inithost(void);
508 extern int	isdir(char name[]);
509 extern boolean_t is_headline(const char *);
510 extern int	ishfield(char linebuf[], char field[]);
511 extern int	ishost(char *sys, char *rest);
512 extern int	isign(char *field, int saving);
513 extern void	istrcpy(char *dest, int dstsize, char *src);
514 extern void	lcwrite(char *fn, FILE *fi, FILE *fo, int addnl);
515 extern void	load(char *name);
516 extern int	loadmsg(char str[]);
517 extern int	lock(FILE *fp, char *mode, int blk);
518 extern void	lockmail(void);
519 extern int	mail(char **people);
520 extern void	mail1(struct header *hp, int use_to, char *orig_to);
521 extern void	mapf(register struct name *np, char *from);
522 extern int	mboxit(int msgvec[]);
523 extern void	mechk(struct name *names);
524 extern int	member(register char *realfield,
525 		    register struct ignore **table);
526 extern int	messize(int *msgvec);
527 extern void	minit(void);
528 extern int	more(int *msgvec);
529 extern long	msend(struct message *mailp, FILE *obuf,
530 		    int flag, int (*fp)(const char *, FILE *));
531 extern int	my_fclose(register FILE *iop);
532 extern FILE	*my_fopen(char *file, char *mode);
533 extern char	*nameof(register struct message *mp);
534 extern char	*netmap(char name[], char from[]);
535 extern int	newfileinfo(int start);
536 extern int	next(int *msgvec);
537 extern int	npclose(FILE *ptr);
538 extern FILE	*npopen(char *cmd, char *mode);
539 extern char	*nstrcpy(char *dst, int dstsize, char *src);
540 extern char	*nstrcat(char *dst, int dstsize, char *src);
541 extern int	null(char *e);
542 extern int	outof(struct name *names, FILE *fo);
543 extern struct name	*outpre(struct name *to);
544 extern void	panic(char *str);
545 extern int	parse_headline(const char *, headline_t *);
546 extern int	pcmdlist(void);
547 extern int	pdot(void);
548 extern int	preserve(int *msgvec);
549 extern void	printgroup(char name[]);
550 extern void	printhead(int mesg);
551 extern int	puthead(struct header *hp, FILE *fo, int w, long clen);
552 extern int	pversion(char *e);
553 extern void	quit(int noremove);
554 extern int	readline(FILE *ibuf, char *linebuf);
555 extern void	receipt(struct message *mp);
556 extern void	relsesigs(void);
557 extern int	removefile(char name[]);
558 extern int	replyall(int *msgvec);
559 extern int	replysender(int *msgvec);
560 extern int	respond(int *msgvec);
561 extern int	retfield(char *list[]);
562 extern int	rexit(int e);
563 extern char	*safeexpand(char name[]);
564 extern void	*salloc(unsigned size);
565 extern void	*srealloc(void *optr, unsigned size);
566 extern int	samebody(register char *user, register char *addr,
567 		    int fuzzy);
568 extern int	save(char str[]);
569 extern void	savedead(int s);
570 extern char	*savestr(char *str);
571 extern int	schdir(char *str);
572 extern int	screensize(void);
573 extern int	scroll(char arg[]);
574 extern int	sendm(char *str);
575 extern int	set(char **arglist);
576 extern void	setclen(register struct message *mp);
577 extern int	setfile(char *name, int isedit);
578 extern FILE	*setinput(register struct message *mp);
579 extern void	setptr(register FILE *ibuf);
580 extern int	shell(char *str);
581 #ifndef sigchild
582 extern void		sigchild(void);
583 #endif
584 #ifndef sigset
585 extern void		(*sigset())();
586 #endif
587 extern char		*skin(char *name);
588 extern char		*snarf(char linebuf[], int *flag, int erf);
589 extern int		source(char name[]);
590 extern char		*splice(char *addr, char *hdr);
591 extern int		sput(char str[]);
592 extern void		sreset(void);
593 extern void		stop(int s);
594 extern int		stouch(int msgvec[]);
595 extern int		substr(char *string1, char *string2);
596 extern int		swrite(char str[]);
597 extern struct name	*tailof(struct name *name);
598 extern void		tinit(void);
599 extern int		tmail(void);
600 extern int		top(int *msgvec);
601 extern void		touch(int mesg);
602 extern struct name	*translate(struct name *np);
603 extern int		type(int *msgvec);
604 extern int		undelete(int *msgvec);
605 extern int		ungroup(char **argv);
606 extern int		unigfield(char *list[]);
607 extern void		unlockmail(void);
608 extern char		**unpack(struct name *np);
609 extern int		unread(int msgvec[]);
610 extern int		unretfield(char *list[]);
611 extern int		unset(char **arglist);
612 extern int		unstack(void);
613 extern char		*unuucp(char *name);
614 extern struct name	*usermap(struct name *names);
615 extern char		*value(char name[]);
616 extern char		*vcopy(char str[]);
617 extern void		vfree(register char *cp);
618 extern int		visual(int *msgvec);
619 extern char		*yankword(char *name, char *word, int sz, int comma);
620 
621 /*
622  * These functions are defined in libmail.a
623  */
624 #ifdef	__cplusplus
625 extern "C" {
626 #endif
627 extern int		delempty(mode_t, char *);
628 extern char		*maildomain(void);
629 extern void		touchlock(void);
630 extern char		*xgetenv(char *);
631 extern int		xsetenv(char *);
632 #ifdef	__cplusplus
633 }
634 #endif
635 
636 /*
637  * Standard functions from the C library.
638  * These are all defined in <stdlib.h> and <wait.h> in SVr4.
639  */
640 #ifdef preSVr4
641 extern long		atol();
642 extern char		*getcwd();
643 extern char		*calloc();
644 extern char		*getenv();
645 extern void		exit();
646 extern void		free();
647 extern char		*malloc();
648 extern time_t		time();
649 extern long		ulimit();
650 extern int		utime();
651 extern int		wait();
652 extern int		fputs();
653 #endif
654 
655 #ifdef	__cplusplus
656 }
657 #endif
658 
659 #endif	/* _MAILX_DEF_H */
660