xref: /illumos-gate/usr/src/cmd/dumpadm/dconf.c (revision bbf21555)
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  * Copyright (c) 1998, 2010, Oracle and/or its affiliates. All rights reserved.
23  * Copyright 2015 Nexenta Systems, Inc. All rights reserved.
24  * Copyright 2020 Joyent, Inc.
25  */
26 
27 #include <sys/types.h>
28 #include <sys/stat.h>
29 #include <sys/swap.h>
30 #include <sys/dumpadm.h>
31 #include <sys/utsname.h>
32 
33 #include <unistd.h>
34 #include <string.h>
35 #include <stdlib.h>
36 #include <stdio.h>
37 #include <fcntl.h>
38 #include <errno.h>
39 #include <libdiskmgt.h>
40 #include <libzfs.h>
41 #include <libzutil.h>
42 #include <uuid/uuid.h>
43 
44 #include "dconf.h"
45 #include "minfree.h"
46 #include "utils.h"
47 #include "swap.h"
48 
49 typedef struct dc_token {
50 	const char *tok_name;
51 	int (*tok_parse)(dumpconf_t *, char *);
52 	int (*tok_print)(const dumpconf_t *, FILE *);
53 } dc_token_t;
54 
55 
56 static int print_device(const dumpconf_t *, FILE *);
57 static int print_savdir(const dumpconf_t *, FILE *);
58 static int print_content(const dumpconf_t *, FILE *);
59 static int print_enable(const dumpconf_t *, FILE *);
60 static int print_csave(const dumpconf_t *, FILE *);
61 
62 static const dc_token_t tokens[] = {
63 	{ "DUMPADM_DEVICE", dconf_str2device, print_device },
64 	{ "DUMPADM_SAVDIR", dconf_str2savdir, print_savdir },
65 	{ "DUMPADM_CONTENT", dconf_str2content, print_content },
66 	{ "DUMPADM_ENABLE", dconf_str2enable, print_enable },
67 	{ "DUMPADM_CSAVE", dconf_str2csave, print_csave },
68 	{ NULL, NULL, NULL }
69 };
70 
71 static const char DC_STR_ON[] = "on";		/* On string */
72 static const char DC_STR_OFF[] = "off";		/* Off string */
73 static const char DC_STR_YES[] = "yes";		/* Enable on string */
74 static const char DC_STR_NO[] = "no";		/* Enable off string */
75 static const char DC_STR_SWAP[] = "swap";	/* Default dump device */
76 static const char DC_STR_NONE[] = "none";
77 
78 /* The pages included in the dump */
79 static const char DC_STR_KERNEL[] = "kernel";	/* Kernel only */
80 static const char DC_STR_CURPROC[] = "curproc";	/* Kernel + current process */
81 static const char DC_STR_ALL[] = "all";		/* All pages */
82 
83 /*
84  * Permissions and ownership for the configuration file:
85  */
86 #define	DC_OWNER	0				/* Uid 0 (root) */
87 #define	DC_GROUP	1				/* Gid 1 (other) */
88 #define	DC_PERM	(S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH)	/* Mode 0644 */
89 
90 static void
dconf_init(dumpconf_t * dcp,int dcmode)91 dconf_init(dumpconf_t *dcp, int dcmode)
92 {
93 	struct utsname ut;
94 
95 	/*
96 	 * Default device for dumps is 'swap' (appropriate swap device),
97 	 * and default savecore directory is /var/crash/`uname -n`,
98 	 * which is compatible with pre-dumpadm behavior.
99 	 */
100 	(void) strcpy(dcp->dc_device, DC_STR_SWAP);
101 	(void) strcpy(dcp->dc_savdir, "/var/crash");
102 
103 	if (uname(&ut) != -1) {
104 		(void) strcat(dcp->dc_savdir, "/");
105 		(void) strcat(dcp->dc_savdir, ut.nodename);
106 	}
107 
108 	/*
109 	 * Default is contents kernel, savecore enabled on reboot,
110 	 * savecore saves compressed core files.
111 	 */
112 	dcp->dc_cflags = DUMP_KERNEL;
113 	dcp->dc_enable = DC_ON;
114 	dcp->dc_csave = DC_COMPRESSED;
115 
116 	dcp->dc_mode = dcmode;
117 	dcp->dc_conf_fp = NULL;
118 	dcp->dc_conf_fd = -1;
119 	dcp->dc_dump_fd = -1;
120 	dcp->dc_readonly = B_FALSE;
121 }
122 
123 int
dconf_open(dumpconf_t * dcp,const char * dpath,const char * fpath,int dcmode)124 dconf_open(dumpconf_t *dcp, const char *dpath, const char *fpath, int dcmode)
125 {
126 	char buf[BUFSIZ];
127 	int line;
128 	const char *fpmode = "r+";
129 
130 	dconf_init(dcp, dcmode);
131 
132 	if ((dcp->dc_dump_fd = open(dpath, O_RDWR)) == -1) {
133 		warn(gettext("failed to open %s"), dpath);
134 		return (-1);
135 	}
136 
137 	if ((dcp->dc_conf_fd = open(fpath, O_RDWR | O_CREAT, DC_PERM)) == -1) {
138 		/*
139 		 * Attempt to open the file read-only.
140 		 */
141 		if ((dcp->dc_conf_fd = open(fpath, O_RDONLY)) == -1) {
142 			warn(gettext("failed to open %s"), fpath);
143 			return (-1);
144 		}
145 
146 		dcp->dc_readonly = B_TRUE;
147 		fpmode = "r";
148 	}
149 
150 	if ((dcp->dc_conf_fp = fdopen(dcp->dc_conf_fd, fpmode)) == NULL) {
151 		warn(gettext("failed to open stream for %s"), fpath);
152 		return (-1);
153 	}
154 
155 	/*
156 	 * If we're in override mode, the current kernel settings override the
157 	 * default settings and anything invalid in the configuration file.
158 	 */
159 	if (dcmode == DC_OVERRIDE)
160 		(void) dconf_getdev(dcp);
161 
162 	for (line = 1; fgets(buf, BUFSIZ, dcp->dc_conf_fp) != NULL; line++) {
163 
164 		char name[BUFSIZ], value[BUFSIZ];
165 		const dc_token_t *tokp;
166 		int len;
167 
168 		if (buf[0] == '#' || buf[0] == '\n')
169 			continue;
170 
171 		/*
172 		 * Look for "name=value", with optional whitespace on either
173 		 * side, terminated by a newline, and consuming the whole line.
174 		 */
175 		/* LINTED - unbounded string specifier */
176 		if (sscanf(buf, " %[^=]=%s \n%n", name, value, &len) == 2 &&
177 		    name[0] != '\0' && value[0] != '\0' && len == strlen(buf)) {
178 			/*
179 			 * Locate a matching token in the tokens[] table,
180 			 * and invoke its parsing function.
181 			 */
182 			for (tokp = tokens; tokp->tok_name != NULL; tokp++) {
183 				if (strcmp(name, tokp->tok_name) == 0) {
184 					if (tokp->tok_parse(dcp, value) == -1) {
185 						warn(gettext("\"%s\", line %d: "
186 						    "warning: invalid %s\n"),
187 						    fpath, line, name);
188 					}
189 					break;
190 				}
191 			}
192 
193 			/*
194 			 * If we hit the end of the tokens[] table,
195 			 * no matching token was found.
196 			 */
197 			if (tokp->tok_name == NULL) {
198 				warn(gettext("\"%s\", line %d: warning: "
199 				    "invalid token: %s\n"), fpath, line, name);
200 			}
201 
202 		} else {
203 			warn(gettext("\"%s\", line %d: syntax error\n"),
204 			    fpath, line);
205 		}
206 	}
207 
208 	/*
209 	 * If we're not in override mode, the current kernel settings
210 	 * override the settings read from the configuration file.
211 	 */
212 	if (dcmode == DC_CURRENT)
213 		return (dconf_getdev(dcp));
214 
215 	return (0);
216 }
217 
218 int
dconf_getdev(dumpconf_t * dcp)219 dconf_getdev(dumpconf_t *dcp)
220 {
221 	int status = 0;
222 
223 	if ((dcp->dc_cflags = ioctl(dcp->dc_dump_fd, DIOCGETCONF, 0)) == -1) {
224 		warn(gettext("failed to get kernel dump settings"));
225 		status = -1;
226 	}
227 
228 	if (ioctl(dcp->dc_dump_fd, DIOCGETDEV, dcp->dc_device) == -1) {
229 		if (errno != ENODEV) {
230 			warn(gettext("failed to get dump device"));
231 			status = -1;
232 		} else
233 			dcp->dc_device[0] = '\0';
234 	}
235 
236 	return (status);
237 }
238 
239 int
dconf_close(dumpconf_t * dcp)240 dconf_close(dumpconf_t *dcp)
241 {
242 	if (fclose(dcp->dc_conf_fp) == 0) {
243 		(void) close(dcp->dc_dump_fd);
244 		return (0);
245 	}
246 	return (-1);
247 }
248 
249 int
dconf_write(dumpconf_t * dcp)250 dconf_write(dumpconf_t *dcp)
251 {
252 	const dc_token_t *tokp;
253 
254 	if (fseeko(dcp->dc_conf_fp, (off_t)0, SEEK_SET) == -1) {
255 		warn(gettext("failed to seek config file"));
256 		return (-1);
257 	}
258 
259 	if (ftruncate(dcp->dc_conf_fd, (off_t)0) == -1) {
260 		warn(gettext("failed to truncate config file"));
261 		return (-1);
262 	}
263 
264 	(void) fputs("#\n# dumpadm.conf\n#\n"
265 	    "# Configuration parameters for system crash dump.\n"
266 	    "# Do NOT edit this file by hand -- use dumpadm(8) instead.\n"
267 	    "#\n", dcp->dc_conf_fp);
268 
269 	for (tokp = tokens; tokp->tok_name != NULL; tokp++) {
270 		if (fprintf(dcp->dc_conf_fp, "%s=", tokp->tok_name) == -1 ||
271 		    tokp->tok_print(dcp, dcp->dc_conf_fp) == -1) {
272 			warn(gettext("failed to write token"));
273 			return (-1);
274 		}
275 	}
276 
277 	if (fflush(dcp->dc_conf_fp) != 0)
278 		warn(gettext("warning: failed to flush config file"));
279 
280 	if (fsync(dcp->dc_conf_fd) == -1)
281 		warn(gettext("warning: failed to sync config file to disk"));
282 
283 	if (fchmod(dcp->dc_conf_fd, DC_PERM) == -1)
284 		warn(gettext("warning: failed to reset mode on config file"));
285 
286 	if (fchown(dcp->dc_conf_fd, DC_OWNER, DC_GROUP) == -1)
287 		warn(gettext("warning: failed to reset owner on config file"));
288 
289 	return (0);
290 }
291 
292 static int
open_stat64(const char * path,struct stat64 * stp)293 open_stat64(const char *path, struct stat64 *stp)
294 {
295 	int fd = open64(path, O_RDONLY);
296 
297 	if (fd >= 0) {
298 		int status = fstat64(fd, stp);
299 		(void) close(fd);
300 		return (status);
301 	}
302 
303 	return (-1);
304 }
305 
306 static int
dconf_swap_compare(const swapent_t * s1,const swapent_t * s2)307 dconf_swap_compare(const swapent_t *s1, const swapent_t *s2)
308 {
309 	struct stat64 st1, st2;
310 
311 	int prefer_s1 = -1;	/* Return value to move s1 left (s1 < s2) */
312 	int prefer_s2 = 1;	/* Return value to move s2 left (s1 > s2) */
313 
314 	/*
315 	 * First try: open and fstat each swap entry.  If either system
316 	 * call fails, arbitrarily prefer the other entry.
317 	 */
318 	if (open_stat64(s1->ste_path, &st1) == -1)
319 		return (prefer_s2);
320 
321 	if (open_stat64(s2->ste_path, &st2) == -1)
322 		return (prefer_s1);
323 
324 	/*
325 	 * Second try: if both entries are block devices, or if
326 	 * neither is a block device, prefer the larger.
327 	 */
328 	if (S_ISBLK(st1.st_mode) == S_ISBLK(st2.st_mode)) {
329 		if (st2.st_size > st1.st_size)
330 			return (prefer_s2);
331 		return (prefer_s1);
332 	}
333 
334 	/*
335 	 * Third try: prefer the entry that is a block device.
336 	 */
337 	if (S_ISBLK(st2.st_mode))
338 		return (prefer_s2);
339 	return (prefer_s1);
340 }
341 
342 static int
dconf_dev_ioctl(dumpconf_t * dcp,int cmd)343 dconf_dev_ioctl(dumpconf_t *dcp, int cmd)
344 {
345 	if (ioctl(dcp->dc_dump_fd, cmd, dcp->dc_device) == 0)
346 		return (0);
347 
348 	switch (errno) {
349 	case ENOTSUP:
350 		warn(gettext("dumps not supported on %s\n"), dcp->dc_device);
351 		break;
352 	case EBUSY:
353 		warn(gettext("device %s is already in use\n"), dcp->dc_device);
354 		break;
355 	case EBADR:
356 		/* ZFS pool is too fragmented to support a dump device */
357 		warn(gettext("device %s is too fragmented to be used as "
358 		    "a dump device\n"), dcp->dc_device);
359 		break;
360 	default:
361 		/*
362 		 * NOTE: The stmsboot(8) command's boot-up script parses this
363 		 * error to get the dump device name. If you change the format
364 		 * of this message, make sure that stmsboot(8) is in sync.
365 		 */
366 		warn(gettext("cannot use %s as dump device"), dcp->dc_device);
367 	}
368 	return (-1);
369 }
370 
371 int
dconf_update(dumpconf_t * dcp,int checkinuse)372 dconf_update(dumpconf_t *dcp, int checkinuse)
373 {
374 	int		oconf;
375 	int		error;
376 	char		*msg;
377 
378 	error = 0;
379 
380 	if (checkinuse && (dm_inuse(dcp->dc_device, &msg, DM_WHO_DUMP,
381 	    &error) || error)) {
382 		if (error != 0) {
383 			warn(gettext("failed to determine if %s is"
384 			    " in use"), dcp->dc_device);
385 		} else {
386 			warn(msg);
387 			free(msg);
388 			return (-1);
389 		}
390 	}
391 
392 	/*
393 	 * Save the existing dump configuration in case something goes wrong.
394 	 */
395 	if ((oconf = ioctl(dcp->dc_dump_fd, DIOCGETCONF, 0)) == -1) {
396 		warn(gettext("failed to get kernel dump configuration"));
397 		return (-1);
398 	}
399 
400 	oconf &= DUMP_CONTENT;
401 	dcp->dc_cflags &= DUMP_CONTENT;
402 
403 	if (ioctl(dcp->dc_dump_fd, DIOCSETCONF, dcp->dc_cflags) == -1) {
404 		warn(gettext("failed to update kernel dump configuration"));
405 		return (-1);
406 	}
407 
408 	if (strcmp(dcp->dc_device, DC_STR_SWAP) == 0) {
409 		swaptbl_t *swt;
410 		int i;
411 
412 		if ((swt = swap_list()) == NULL)
413 			goto err;
414 
415 		if (swt->swt_n == 0) {
416 			warn(gettext("no swap devices are available\n"));
417 			free(swt);
418 			goto err;
419 		}
420 
421 		qsort(&swt->swt_ent[0], swt->swt_n, sizeof (swapent_t),
422 		    (int (*)(const void *, const void *))dconf_swap_compare);
423 
424 		/*
425 		 * Iterate through the prioritized list of swap entries,
426 		 * trying to configure one as the dump device.
427 		 */
428 		for (i = 0; i < swt->swt_n; i++) {
429 			if (ioctl(dcp->dc_dump_fd, DIOCSETDEV,
430 			    swt->swt_ent[i].ste_path) == 0) {
431 				(void) strcpy(dcp->dc_device,
432 				    swt->swt_ent[i].ste_path);
433 				break;
434 			}
435 		}
436 
437 		if (i == swt->swt_n) {
438 			warn(gettext("no swap devices could be configured "
439 			    "as the dump device\n"));
440 			free(swt);
441 			goto err;
442 		}
443 		free(swt);
444 
445 	} else if (strcmp(dcp->dc_device, DC_STR_NONE) == 0) {
446 		if (ioctl(dcp->dc_dump_fd, DIOCRMDEV, NULL) == -1) {
447 			warn(gettext("failed to remove dump device"));
448 			return (-1);
449 		}
450 	} else if (dcp->dc_device[0] != '\0') {
451 		/*
452 		 * If we're not in forcible update mode, then fail the change
453 		 * if the selected device cannot be used as the dump device,
454 		 * or if it is not big enough to hold the dump.
455 		 */
456 		if (dcp->dc_mode == DC_CURRENT) {
457 			struct stat64 st;
458 			uint64_t d;
459 
460 			if (dconf_dev_ioctl(dcp, DIOCTRYDEV) == -1)
461 				goto err;
462 
463 			if (open_stat64(dcp->dc_device, &st) == -1) {
464 				warn(gettext("failed to access %s"),
465 				    dcp->dc_device);
466 				goto err;
467 			}
468 
469 			if ((error = zvol_check_dump_config(
470 			    dcp->dc_device)) > 0)
471 				goto err;
472 			if (ioctl(dcp->dc_dump_fd, DIOCGETDUMPSIZE, &d) == -1) {
473 				warn(gettext("failed to get kernel dump size"));
474 				goto err;
475 			}
476 
477 			if (st.st_size < d) {
478 				warn(gettext("dump device %s is too small to "
479 				    "hold a system dump\ndump size %llu "
480 				    "bytes, device size %lld bytes\n"),
481 				    dcp->dc_device, d, st.st_size);
482 				goto err;
483 			}
484 		}
485 
486 		if (dconf_dev_ioctl(dcp, DIOCSETDEV) == -1)
487 			goto err;
488 	}
489 
490 	/*
491 	 * Now that we've updated the dump device, we need to issue another
492 	 * ioctl to re-read the config flags to determine whether we
493 	 * obtained DUMP_EXCL access on our dump device.
494 	 */
495 	if ((dcp->dc_cflags = ioctl(dcp->dc_dump_fd, DIOCGETCONF, 0)) == -1) {
496 		warn(gettext("failed to re-read kernel dump configuration"));
497 		return (-1);
498 	}
499 
500 	return (0);
501 
502 err:
503 	(void) ioctl(dcp->dc_dump_fd, DIOCSETCONF, oconf);
504 	return (-1);
505 }
506 
507 int
dconf_write_uuid(dumpconf_t * dcp)508 dconf_write_uuid(dumpconf_t *dcp)
509 {
510 	char uuidstr[36 + 1];
511 	uuid_t uu;
512 	int err;
513 
514 	uuid_generate(uu);
515 	uuid_unparse(uu, uuidstr);
516 
517 	err = ioctl(dcp->dc_dump_fd, DIOCSETUUID, uuidstr);
518 
519 	if (err)
520 		warn(gettext("kernel image uuid write failed"));
521 
522 	return (err == 0);
523 }
524 
525 int
dconf_get_dumpsize(dumpconf_t * dcp)526 dconf_get_dumpsize(dumpconf_t *dcp)
527 {
528 	char buf[32];
529 	uint64_t d;
530 
531 	if (ioctl(dcp->dc_dump_fd, DIOCGETDUMPSIZE, &d) == -1) {
532 		warn(gettext("failed to get kernel dump size"));
533 		return (-1);
534 	}
535 
536 	zfs_nicenum(d, buf, sizeof (buf));
537 
538 	(void) printf(gettext("Estimated dump size: %s\n"), buf);
539 	return (0);
540 }
541 
542 void
dconf_print(dumpconf_t * dcp,FILE * fp)543 dconf_print(dumpconf_t *dcp, FILE *fp)
544 {
545 	u_longlong_t min;
546 	char *content;
547 
548 	if (dcp->dc_cflags & DUMP_ALL)
549 		content = gettext("all");
550 	else if (dcp->dc_cflags & DUMP_CURPROC)
551 		content = gettext("kernel and current process");
552 	else
553 		content = gettext("kernel");
554 
555 	(void) fprintf(fp, gettext("      Dump content: %s pages\n"), content);
556 
557 	if (dcp->dc_device[0] != '\0') {
558 		(void) fprintf(fp, gettext("       Dump device: %s (%s)\n"),
559 		    dcp->dc_device, (dcp->dc_cflags & DUMP_EXCL) ?
560 		    gettext("dedicated") : gettext("swap"));
561 	} else {
562 		(void) fprintf(fp, gettext("       Dump device: none "
563 		    "(dumps disabled)\n"));
564 	}
565 
566 	(void) fprintf(fp, gettext("Savecore directory: %s"), dcp->dc_savdir);
567 
568 	if (minfree_read(dcp->dc_savdir, &min) == 0) {
569 		if (min < 1024 || (min % 1024) != 0)
570 			(void) fprintf(fp, gettext(" (minfree = %lluKB)"), min);
571 		else
572 			(void) fprintf(fp, gettext(" (minfree = %lluMB)"),
573 			    min / 1024);
574 	}
575 
576 	(void) fprintf(fp, gettext("\n"));
577 
578 	(void) fprintf(fp, gettext("  Savecore enabled: %s\n"),
579 	    (dcp->dc_enable == DC_OFF) ? gettext("no") : gettext("yes"));
580 	(void) fprintf(fp, gettext("   Save compressed: %s\n"),
581 	    (dcp->dc_csave == DC_UNCOMPRESSED) ? gettext("off") :
582 	    gettext("on"));
583 }
584 
585 int
dconf_str2device(dumpconf_t * dcp,char * buf)586 dconf_str2device(dumpconf_t *dcp, char *buf)
587 {
588 	if (strcasecmp(buf, DC_STR_SWAP) == 0) {
589 		(void) strcpy(dcp->dc_device, DC_STR_SWAP);
590 		return (0);
591 	}
592 
593 	if (strcasecmp(buf, DC_STR_NONE) == 0) {
594 		(void) strcpy(dcp->dc_device, DC_STR_NONE);
595 		return (0);
596 	}
597 
598 	if (valid_abspath(buf)) {
599 		(void) strcpy(dcp->dc_device, buf);
600 		return (0);
601 	}
602 
603 	return (-1);
604 }
605 
606 int
dconf_str2savdir(dumpconf_t * dcp,char * buf)607 dconf_str2savdir(dumpconf_t *dcp, char *buf)
608 {
609 	if (valid_abspath(buf)) {
610 		(void) strcpy(dcp->dc_savdir, buf);
611 		return (0);
612 	}
613 
614 	return (-1);
615 }
616 
617 int
dconf_str2content(dumpconf_t * dcp,char * buf)618 dconf_str2content(dumpconf_t *dcp, char *buf)
619 {
620 	if (strcasecmp(buf, DC_STR_KERNEL) == 0) {
621 		dcp->dc_cflags = (dcp->dc_cflags & ~DUMP_CONTENT) | DUMP_KERNEL;
622 		return (0);
623 	}
624 
625 	if (strcasecmp(buf, DC_STR_CURPROC) == 0) {
626 		dcp->dc_cflags = (dcp->dc_cflags & ~DUMP_CONTENT) |
627 		    DUMP_CURPROC;
628 		return (0);
629 	}
630 
631 	if (strcasecmp(buf, DC_STR_ALL) == 0) {
632 		dcp->dc_cflags = (dcp->dc_cflags & ~DUMP_CONTENT) | DUMP_ALL;
633 		return (0);
634 	}
635 
636 	warn(gettext("invalid dump content type -- %s\n"), buf);
637 	return (-1);
638 }
639 
640 int
dconf_str2enable(dumpconf_t * dcp,char * buf)641 dconf_str2enable(dumpconf_t *dcp, char *buf)
642 {
643 	if (strcasecmp(buf, DC_STR_YES) == 0) {
644 		dcp->dc_enable = DC_ON;
645 		return (0);
646 	}
647 
648 	if (strcasecmp(buf, DC_STR_NO) == 0) {
649 		dcp->dc_enable = DC_OFF;
650 		return (0);
651 	}
652 
653 	warn(gettext("invalid enable value -- %s\n"), buf);
654 	return (-1);
655 }
656 
657 int
dconf_str2csave(dumpconf_t * dcp,char * buf)658 dconf_str2csave(dumpconf_t *dcp, char *buf)
659 {
660 	if (strcasecmp(buf, DC_STR_ON) == 0) {
661 		dcp->dc_csave = DC_COMPRESSED;
662 		return (0);
663 	}
664 
665 	if (strcasecmp(buf, DC_STR_OFF) == 0) {
666 		dcp->dc_csave = DC_UNCOMPRESSED;
667 		return (0);
668 	}
669 
670 	warn(gettext("invalid save compressed value -- %s\n"), buf);
671 	return (-1);
672 }
673 
674 static int
print_content(const dumpconf_t * dcp,FILE * fp)675 print_content(const dumpconf_t *dcp, FILE *fp)
676 {
677 	const char *content;
678 
679 	if (dcp->dc_cflags & DUMP_ALL)
680 		content = DC_STR_ALL;
681 	else if (dcp->dc_cflags & DUMP_CURPROC)
682 		content = DC_STR_CURPROC;
683 	else
684 		content = DC_STR_KERNEL;
685 
686 	return (fprintf(fp, "%s\n", content));
687 }
688 
689 static int
print_device(const dumpconf_t * dcp,FILE * fp)690 print_device(const dumpconf_t *dcp, FILE *fp)
691 {
692 	return (fprintf(fp, "%s\n", (dcp->dc_device[0] != '\0') ?
693 	    dcp->dc_device : DC_STR_SWAP));
694 }
695 
696 static int
print_enable(const dumpconf_t * dcp,FILE * fp)697 print_enable(const dumpconf_t *dcp, FILE *fp)
698 {
699 	return (fprintf(fp, "%s\n", (dcp->dc_enable == DC_OFF) ?
700 	    DC_STR_NO : DC_STR_YES));
701 }
702 
703 static int
print_csave(const dumpconf_t * dcp,FILE * fp)704 print_csave(const dumpconf_t *dcp, FILE *fp)
705 {
706 	return (fprintf(fp, "%s\n", (dcp->dc_csave == DC_COMPRESSED) ?
707 	    DC_STR_ON : DC_STR_OFF));
708 }
709 
710 static int
print_savdir(const dumpconf_t * dcp,FILE * fp)711 print_savdir(const dumpconf_t *dcp, FILE *fp)
712 {
713 	return (fprintf(fp, "%s\n", dcp->dc_savdir));
714 }
715