2 * collectd - src/utils_mount.c
3 * Copyright (C) 2005,2006 Niki W. Waibel
5 * This program is free software; you can redistribute it and/
6 * or modify it under the terms of the GNU General Public Li-
7 * cence as published by the Free Software Foundation; either
8 * version 2 of the Licence, or any later version.
10 * This program is distributed in the hope that it will be use-
11 * ful, but WITHOUT ANY WARRANTY; without even the implied war-
12 * ranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
13 * See the GNU General Public Licence for more details.
15 * You should have received a copy of the GNU General Public
16 * Licence along with this program; if not, write to the Free
17 * Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139,
21 * Niki W. Waibel <niki.waibel@gmx.net>
25 #include "utils_mount.h"
27 #include "common.h" /* sstrncpy() et alii */
28 #include "plugin.h" /* ERROR() macro */
32 #define XFS_SUPER_MAGIC_STR "XFSB"
33 #define XFS_SUPER_MAGIC2_STR "BSFX"
38 # include <sys/types.h>
40 # if HAVE_SYS_STATVFS_H
41 # include <sys/statvfs.h>
43 /* #endif HAVE_GETVFSSTAT */
47 # include <sys/param.h>
50 # include <sys/ucred.h>
53 # include <sys/mount.h>
55 #endif /* HAVE_GETFSSTAT */
61 # include <sys/mnttab.h>
68 #ifdef COLLECTD_MNTTAB
69 # undef COLLECTD_MNTTAB
72 #if defined(_PATH_MOUNTED) /* glibc */
73 # define COLLECTD_MNTTAB _PATH_MOUNTED
74 #elif defined(MNTTAB) /* Solaris */
75 # define COLLECTD_MNTTAB MNTTAB
76 #elif defined(MNT_MNTTAB)
77 # define COLLECTD_MNTTAB MNT_MNTTAB
78 #elif defined(MNTTABNAME)
79 # define COLLECTD_MNTTAB MNTTABNAME
81 # define COLLECTD_MNTTAB KMTAB
83 # define COLLECTD_MNTTAB "/etc/mnttab"
86 /* *** *** *** ********************************************* *** *** *** */
87 /* *** *** *** *** *** *** private functions *** *** *** *** *** *** */
88 /* *** *** *** ********************************************* *** *** *** */
90 /* stolen from quota-3.13 (quota-tools) */
92 #define PROC_PARTITIONS "/proc/partitions"
93 #define DEVLABELDIR "/dev"
97 static struct uuidCache_s {
98 struct uuidCache_s *next;
104 #define EXT2_SUPER_MAGIC 0xEF53
105 struct ext2_super_block {
106 unsigned char s_dummy1[56];
107 unsigned char s_magic[2];
108 unsigned char s_dummy2[46];
109 unsigned char s_uuid[16];
110 char s_volume_name[16];
112 #define ext2magic(s) ((unsigned int)s.s_magic[0] \
113 + (((unsigned int)s.s_magic[1]) << 8))
116 struct xfs_super_block {
117 unsigned char s_magic[4];
118 unsigned char s_dummy[28];
119 unsigned char s_uuid[16];
120 unsigned char s_dummy2[60];
123 #endif /* HAVE_XFS_XQM_H */
125 #define REISER_SUPER_MAGIC "ReIsEr2Fs"
126 struct reiserfs_super_block {
127 unsigned char s_dummy1[52];
128 unsigned char s_magic[10];
129 unsigned char s_dummy2[22];
130 unsigned char s_uuid[16];
131 char s_volume_name[16];
134 /* for now, only ext2 and xfs are supported */
136 get_label_uuid(const char *device, char **label, char *uuid)
138 /* start with ext2 and xfs tests, taken from mount_guess_fstype */
139 /* should merge these later */
142 struct ext2_super_block e2sb;
144 struct xfs_super_block xfsb;
146 struct reiserfs_super_block reisersb;
148 fd = open(device, O_RDONLY);
153 if(lseek(fd, 1024, SEEK_SET) == 1024
154 && read(fd, (char *)&e2sb, sizeof(e2sb)) == sizeof(e2sb)
155 && ext2magic(e2sb) == EXT2_SUPER_MAGIC) {
156 memcpy(uuid, e2sb.s_uuid, sizeof(e2sb.s_uuid));
157 namesize = sizeof(e2sb.s_volume_name);
158 *label = smalloc(namesize + 1);
159 sstrncpy(*label, e2sb.s_volume_name, namesize);
162 } else if(lseek(fd, 0, SEEK_SET) == 0
163 && read(fd, (char *)&xfsb, sizeof(xfsb)) == sizeof(xfsb)
164 && (strncmp((char *)&xfsb.s_magic, XFS_SUPER_MAGIC_STR, 4) == 0 ||
165 strncmp((char *)&xfsb.s_magic, XFS_SUPER_MAGIC2_STR, 4) == 0)) {
166 memcpy(uuid, xfsb.s_uuid, sizeof(xfsb.s_uuid));
167 namesize = sizeof(xfsb.s_fsname);
168 *label = smalloc(namesize + 1);
169 sstrncpy(*label, xfsb.s_fsname, namesize);
171 #endif /* HAVE_XFS_XQM_H */
172 } else if(lseek(fd, 65536, SEEK_SET) == 65536
173 && read(fd, (char *)&reisersb, sizeof(reisersb)) == sizeof(reisersb)
174 && !strncmp((char *)&reisersb.s_magic, REISER_SUPER_MAGIC, 9)) {
175 memcpy(uuid, reisersb.s_uuid, sizeof(reisersb.s_uuid));
176 namesize = sizeof(reisersb.s_volume_name);
177 *label = smalloc(namesize + 1);
178 sstrncpy(*label, reisersb.s_volume_name, namesize);
186 uuidcache_addentry(char *device, char *label, char *uuid)
188 struct uuidCache_s *last;
191 last = uuidCache = smalloc(sizeof(*uuidCache));
193 for(last = uuidCache; last->next; last = last->next);
194 last->next = smalloc(sizeof(*uuidCache));
198 last->device = device;
200 memcpy(last->uuid, uuid, sizeof(last->uuid));
209 static char ptname[100];
211 char uuid[16], *label = NULL;
220 procpt = fopen(PROC_PARTITIONS, "r");
225 for(firstPass = 1; firstPass >= 0; firstPass--) {
226 fseek(procpt, 0, SEEK_SET);
227 while(fgets(line, sizeof(line), procpt)) {
228 if(sscanf(line, " %d %d %d %[^\n ]",
229 &ma, &mi, &sz, ptname) != 4)
234 /* skip extended partitions (heuristic: size 1) */
239 /* look only at md devices on first pass */
240 handleOnFirst = !strncmp(ptname, "md", 2);
241 if(firstPass != handleOnFirst) {
245 /* skip entire disk (minor 0, 64, ... on ide;
247 /* heuristic: partition name ends in a digit */
249 for(s = ptname; *s; s++);
251 if(isdigit((int)s[-1])) {
253 * Note: this is a heuristic only - there is no reason
254 * why these devices should live in /dev.
255 * Perhaps this directory should be specifiable by option.
256 * One might for example have /devlabel with links to /dev
257 * for the devices that may be accessed in this way.
258 * (This is useful, if the cdrom on /dev/hdc must not
261 ssnprintf(device, sizeof(device), "%s/%s",
262 DEVLABELDIR, ptname);
263 if(!get_label_uuid(device, &label, uuid)) {
264 uuidcache_addentry(sstrdup(device),
276 if(isdigit((int)c)) {
278 } else if(islower((int)c)) {
279 return (c - 'a' + 10);
281 return (c - 'A' + 10);
286 get_spec_by_x(int n, const char *t)
288 struct uuidCache_s *uc;
296 if(!memcmp(t, uc->uuid, sizeof(uc->uuid))) {
297 return sstrdup(uc->device);
301 if(!strcmp(t, uc->label)) {
302 return sstrdup(uc->device);
312 get_spec_by_uuid(const char *s)
318 || s[8] != '-' || s[13] != '-' || s[18] != '-' || s[23] != '-') {
322 for(i=0; i<16; i++) {
326 if(!isxdigit((int)s[0]) || !isxdigit((int)s[1])) {
329 uuid[i] = ((fromhex(s[0]) << 4) | fromhex(s[1]));
332 return get_spec_by_x(UUID, uuid);
335 DEBUG("utils_mount: Found an invalid UUID: %s", s);
339 static char *get_spec_by_volume_label(const char *s)
341 return get_spec_by_x (VOL, s);
344 static char *get_device_name(const char *optstr)
352 else if (strncmp (optstr, "UUID=", 5) == 0)
354 DEBUG ("utils_mount: TODO: check UUID= code!");
355 rc = get_spec_by_uuid (optstr + 5);
357 else if (strncmp (optstr, "LABEL=", 6) == 0)
359 DEBUG ("utils_mount: TODO: check LABEL= code!");
360 rc = get_spec_by_volume_label (optstr + 6);
364 rc = sstrdup (optstr);
369 DEBUG ("utils_mount: Error checking device name: optstr = %s", optstr);
374 /* What weird OS is this..? I can't find any info with google :/ -octo */
375 #if HAVE_LISTMNTENT && 0
376 static cu_mount_t *cu_mount_listmntent (void)
378 cu_mount_t *last = *list;
382 struct tabmntent *mntlist;
383 if(listmntent(&mntlist, COLLECTD_MNTTAB, NULL, NULL) < 0) {
386 DEBUG("utils_mount: calling listmntent() failed: %s",
387 sstrerror (errno, errbuf, sizeof (errbuf)));
388 #endif /* COLLECT_DEBUG */
391 for(p = mntlist; p; p = p->next) {
392 char *loop = NULL, *device = NULL;
395 loop = cu_mount_getoptionvalue(mnt->mnt_opts, "loop=");
396 if(loop == NULL) { /* no loop= mount */
397 device = get_device_name(mnt->mnt_fsname);
399 DEBUG("utils_mount: can't get devicename for fs (%s) %s (%s)"
400 ": ignored", mnt->mnt_type,
401 mnt->mnt_dir, mnt->mnt_fsname);
408 *list = (cu_mount_t *)smalloc(sizeof(cu_mount_t));
411 while(last->next != NULL) { /* is last really last? */
414 last->next = (cu_mount_t *)smalloc(sizeof(cu_mount_t));
417 last->dir = sstrdup(mnt->mnt_dir);
418 last->spec_device = sstrdup(mnt->mnt_fsname);
419 last->device = device;
420 last->type = sstrdup(mnt->mnt_type);
421 last->options = sstrdup(mnt->mnt_opts);
423 } /* for(p = mntlist; p; p = p->next) */
426 } /* cu_mount_t *cu_mount_listmntent(void) */
427 /* #endif HAVE_LISTMNTENT */
429 /* 4.4BSD and Mac OS X (getfsstat) or NetBSD (getvfsstat) */
430 #elif HAVE_GETVFSSTAT || HAVE_GETFSSTAT
431 static cu_mount_t *cu_mount_getfsstat (void)
434 # define STRUCT_STATFS struct statvfs
435 # define CMD_STATFS getvfsstat
436 # define FLAGS_STATFS ST_NOWAIT
437 /* #endif HAVE_GETVFSSTAT */
439 # define STRUCT_STATFS struct statfs
440 # define CMD_STATFS getfsstat
441 # define FLAGS_STATFS MNT_NOWAIT
442 #endif /* HAVE_GETFSSTAT */
450 cu_mount_t *first = NULL;
451 cu_mount_t *last = NULL;
452 cu_mount_t *new = NULL;
454 /* Get the number of mounted file systems */
455 if ((bufsize = CMD_STATFS (NULL, 0, FLAGS_STATFS)) < 1)
459 DEBUG ("utils_mount: getv?fsstat failed: %s",
460 sstrerror (errno, errbuf, sizeof (errbuf)));
461 #endif /* COLLECT_DEBUG */
465 if ((buf = (STRUCT_STATFS *) malloc (bufsize * sizeof (STRUCT_STATFS)))
468 memset (buf, '\0', bufsize * sizeof (STRUCT_STATFS));
470 /* The bufsize needs to be passed in bytes. Really. This is not in the
472 if ((num = CMD_STATFS (buf, bufsize * sizeof (STRUCT_STATFS), FLAGS_STATFS)) < 1)
476 DEBUG ("utils_mount: getv?fsstat failed: %s",
477 sstrerror (errno, errbuf, sizeof (errbuf)));
478 #endif /* COLLECT_DEBUG */
483 for (i = 0; i < num; i++)
485 if ((new = malloc (sizeof (cu_mount_t))) == NULL)
487 memset (new, '\0', sizeof (cu_mount_t));
489 /* Copy values from `struct mnttab' */
490 new->dir = sstrdup (buf[i].f_mntonname);
491 new->spec_device = sstrdup (buf[i].f_mntfromname);
492 new->type = sstrdup (buf[i].f_fstypename);
494 new->device = get_device_name (new->options);
514 /* #endif HAVE_GETVFSSTAT || HAVE_GETFSSTAT */
516 /* Solaris (SunOS 10): int getmntent(FILE *fp, struct mnttab *mp); */
517 #elif HAVE_TWO_GETMNTENT || HAVE_GEN_GETMNTENT || HAVE_SUN_GETMNTENT
518 static cu_mount_t *cu_mount_gen_getmntent (void)
523 cu_mount_t *first = NULL;
524 cu_mount_t *last = NULL;
525 cu_mount_t *new = NULL;
527 DEBUG ("utils_mount: (void); COLLECTD_MNTTAB = %s", COLLECTD_MNTTAB);
529 if ((fp = fopen (COLLECTD_MNTTAB, "r")) == NULL)
532 ERROR ("fopen (%s): %s", COLLECTD_MNTTAB,
533 sstrerror (errno, errbuf, sizeof (errbuf)));
537 while (getmntent (fp, &mt) == 0)
539 if ((new = malloc (sizeof (cu_mount_t))) == NULL)
541 memset (new, '\0', sizeof (cu_mount_t));
543 /* Copy values from `struct mnttab' */
544 new->dir = sstrdup (mt.mnt_mountp);
545 new->spec_device = sstrdup (mt.mnt_special);
546 new->type = sstrdup (mt.mnt_fstype);
547 new->options = sstrdup (mt.mnt_mntopts);
548 new->device = get_device_name (new->options);
567 } /* static cu_mount_t *cu_mount_gen_getmntent (void) */
568 /* #endif HAVE_TWO_GETMNTENT || HAVE_GEN_GETMNTENT || HAVE_SUN_GETMNTENT */
570 #elif HAVE_SEQ_GETMNTENT
571 #warn "This version of `getmntent' hat not yet been implemented!"
572 /* #endif HAVE_SEQ_GETMNTENT */
574 #elif HAVE_GETMNTENT_R
575 static cu_mount_t *cu_mount_getmntent (void)
581 cu_mount_t *first = NULL;
582 cu_mount_t *last = NULL;
583 cu_mount_t *new = NULL;
585 DEBUG ("utils_mount: (void); COLLECTD_MNTTAB = %s", COLLECTD_MNTTAB);
587 if ((fp = setmntent (COLLECTD_MNTTAB, "r")) == NULL)
590 ERROR ("setmntent (%s): %s", COLLECTD_MNTTAB,
591 sstrerror (errno, errbuf, sizeof (errbuf)));
595 while (getmntent_r (fp, &me, mntbuf, sizeof (mntbuf) ))
597 if ((new = malloc (sizeof (cu_mount_t))) == NULL)
599 memset (new, '\0', sizeof (cu_mount_t));
601 /* Copy values from `struct mntent *' */
602 new->dir = sstrdup (me.mnt_dir);
603 new->spec_device = sstrdup (me.mnt_fsname);
604 new->type = sstrdup (me.mnt_type);
605 new->options = sstrdup (me.mnt_opts);
606 new->device = get_device_name (new->options);
609 DEBUG ("utils_mount: new = {dir = %s, spec_device = %s, type = %s, options = %s, device = %s}",
610 new->dir, new->spec_device, new->type, new->options, new->device);
627 DEBUG ("utils_mount: return (0x%p)", (void *) first);
630 } /* HAVE_GETMNTENT_R */
632 #elif HAVE_ONE_GETMNTENT
633 static cu_mount_t *cu_mount_getmntent (void)
638 cu_mount_t *first = NULL;
639 cu_mount_t *last = NULL;
640 cu_mount_t *new = NULL;
642 DEBUG ("utils_mount: (void); COLLECTD_MNTTAB = %s", COLLECTD_MNTTAB);
644 if ((fp = setmntent (COLLECTD_MNTTAB, "r")) == NULL)
647 ERROR ("setmntent (%s): %s", COLLECTD_MNTTAB,
648 sstrerror (errno, errbuf, sizeof (errbuf)));
652 while ((me = getmntent (fp)) != NULL)
654 if ((new = malloc (sizeof (cu_mount_t))) == NULL)
656 memset (new, '\0', sizeof (cu_mount_t));
658 /* Copy values from `struct mntent *' */
659 new->dir = sstrdup (me->mnt_dir);
660 new->spec_device = sstrdup (me->mnt_fsname);
661 new->type = sstrdup (me->mnt_type);
662 new->options = sstrdup (me->mnt_opts);
663 new->device = get_device_name (new->options);
666 DEBUG ("utils_mount: new = {dir = %s, spec_device = %s, type = %s, options = %s, device = %s}",
667 new->dir, new->spec_device, new->type, new->options, new->device);
684 DEBUG ("utils_mount: return (0x%p)", (void *) first);
688 #endif /* HAVE_ONE_GETMNTENT */
690 /* *** *** *** ******************************************** *** *** *** */
691 /* *** *** *** *** *** *** public functions *** *** *** *** *** *** */
692 /* *** *** *** ******************************************** *** *** *** */
694 cu_mount_t *cu_mount_getlist(cu_mount_t **list)
697 cu_mount_t *first = NULL;
698 cu_mount_t *last = NULL;
707 while (last->next != NULL)
711 #if HAVE_LISTMNTENT && 0
712 new = cu_mount_listmntent ();
713 #elif HAVE_GETVFSSTAT || HAVE_GETFSSTAT
714 new = cu_mount_getfsstat ();
715 #elif HAVE_TWO_GETMNTENT || HAVE_GEN_GETMNTENT || HAVE_SUN_GETMNTENT
716 new = cu_mount_gen_getmntent ();
717 #elif HAVE_SEQ_GETMNTENT
718 # error "This version of `getmntent' hat not yet been implemented!"
719 #elif HAVE_ONE_GETMNTENT
720 new = cu_mount_getmntent ();
722 # error "Could not determine how to find mountpoints."
736 while ((last != NULL) && (last->next != NULL))
740 } /* cu_mount_t *cu_mount_getlist(cu_mount_t **list) */
742 void cu_mount_freelist (cu_mount_t *list)
747 for (this = list; this != NULL; this = next)
752 sfree (this->spec_device);
753 sfree (this->device);
755 sfree (this->options);
758 } /* void cu_mount_freelist(cu_mount_t *list) */
761 cu_mount_checkoption(char *line, char *keyword, int full)
764 int l = strlen(keyword);
767 if(line == NULL || keyword == NULL) {
774 line2 = sstrdup(line);
784 p2 = strchr(line, ',');
786 if(strncmp(line2+(p1-line)+1, keyword, l+full) == 0) {
792 p2 = strchr(p1+1, ',');
798 } /* char *cu_mount_checkoption(char *line, char *keyword, int full) */
801 cu_mount_getoptionvalue(char *line, char *keyword)
805 r = cu_mount_checkoption(line, keyword, 0);
808 r += strlen(keyword);
817 m = (char *)smalloc(p-r+1);
818 sstrncpy(m, r, p-r+1);
823 } /* char *cu_mount_getoptionvalue(char *line, char *keyword) */
826 cu_mount_type(const char *type)
828 if(strcmp(type, "ext3") == 0) return CUMT_EXT3;
829 if(strcmp(type, "ext2") == 0) return CUMT_EXT2;
830 if(strcmp(type, "ufs") == 0) return CUMT_UFS;
831 if(strcmp(type, "vxfs") == 0) return CUMT_VXFS;
832 if(strcmp(type, "zfs") == 0) return CUMT_ZFS;
834 } /* int cu_mount_type(const char *type) */