Mercurial > dovecot > core-2.2

annotate src/lib/mountpoint.c @ 4195:a00c5d4915f3 HEAD

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Clear mountpoint struct even in error cases.
author Timo Sirainen <tss@iki.fi>
date Fri, 14 Apr 2006 14:28:21 +0300
parents de4609242c8a
children 455b8162e0a9
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rev   line source
4187
e6d38617efdf Added mountpoint_get() for looking up a path's mount point information.
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1 /* Copyright (c) 2006 Timo Sirainen */
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2
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3 #include "lib.h"
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4 #include "mountpoint.h"
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5
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6 #include <sys/stat.h>
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7
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8 #ifdef HAVE_STATFS_MNTFROMNAME
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9 # include <sys/param.h> /* BSDs */
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10 # include <sys/mount.h>
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11 #elif defined(HAVE_MNTENT_H)
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12 # include <stdio.h>
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13 # include <mntent.h> /* Linux */
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14 #elif defined(HAVE_SYS_MNTTAB_H)
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15 # include <stdio.h>
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16 # include <sys/mnttab.h> /* Solaris */
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17 #else
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18 # define MOUNTPOINT_UNKNOWN
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19 #endif
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20
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de4609242c8a mtab path is /etc/mnttab with Solaris
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21 #ifdef HAVE_SYS_MNTTAB_H
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22 # define MTAB_PATH "/etc/mnttab" /* Solaris */
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23 #else
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24 # define MTAB_PATH "/etc/mtab" /* Linux */
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25 #endif
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26
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27 /* AIX doesn't have these defined */
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28 #ifndef MNTTYPE_SWAP
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29 # define MNTTYPE_SWAP "swap"
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30 #endif
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31 #ifndef MNTTYPE_IGNORE
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32 # define MNTTYPE_IGNORE "ignore"
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33 #endif
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34
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35 int mountpoint_get(const char *path, pool_t pool, struct mountpoint *point_r)
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36 {
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37 #ifdef MOUNTPOINT_UNKNOWN
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38 memset(point_r, 0, sizeof(*point_r));
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39 errno = ENOSYS;
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40 return -1;
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41 #elif defined (HAVE_STATFS_MNTFROMNAME)
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42 /* BSDs */
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43 struct statfs buf;
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44
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45 memset(point_r, 0, sizeof(*point_r));
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46 if (statfs(path, &buf) < 0) {
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47 i_error("statfs(%s) failed: %m", path);
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48 return -1;
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49 }
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50
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51 point_r->device_path = p_strdup(pool, buf.f_mntfromname);
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52 point_r->mount_path = p_strdup(pool, buf.f_mntonname);
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53 point_r->mount_path = p_strdup(pool, buf.f_fstypename);
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54 point_r->block_size = buf.f_bsize;
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55 return 1;
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56 #else
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57 /* Linux, Solaris: /etc/mtab reading */
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58 #ifdef HAVE_SYS_MNTTAB_H
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59 struct mnttab ent;
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60 #else
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61 struct mntent *ent;
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62 #endif
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63 struct stat st, st2;
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64 const char *device_path = NULL, *mount_path = NULL, *type = NULL;
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65 unsigned int block_size;
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66 FILE *f;
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67
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68 memset(point_r, 0, sizeof(*point_r));
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69 if (stat(path, &st) < 0) {
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70 i_error("stat(%s) failed: %m", path);
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71 return -1;
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72 }
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73 block_size = st.st_blksize;
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74
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75 #ifdef HAVE_SYS_MNTTAB_H
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76 /* Solaris */
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77 f = fopen(MTAB_PATH, "r");
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78 if (f == NULL) {
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79 i_error("fopen(%s) failed: %m", MTAB_PATH);
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80 return -1;
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81 }
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82 while ((getmntent(f, &ent)) == 0) {
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83 if (strcmp(ent.mnt_fstype, MNTTYPE_SWAP) == 0 ||
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84 strcmp(ent.mnt_fstype, MNTTYPE_IGNORE) == 0)
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85 continue;
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86
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87 if (stat(ent.mnt_mountp, &st2) == 0 &&
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88 CMP_DEV_T(st.st_dev, st2.st_dev)) {
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89 device_path = ent.mnt_special;
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90 mount_path = ent.mnt_mountp;
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91 type = ent.mnt_fstype;
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92 break;
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93 }
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94 }
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95 fclose(f);
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96 #else
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97 /* Linux */
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98 f = setmntent(MTAB_PATH, "r");
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99 if (f == NULL) {
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100 i_error("setmntent(%s) failed: %m", MTAB_PATH);
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101 return -1;
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102 }
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103 while ((ent = getmntent(f)) != NULL) {
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104 if (strcmp(ent->mnt_type, MNTTYPE_SWAP) == 0 ||
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105 strcmp(ent->mnt_type, MNTTYPE_IGNORE) == 0)
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106 continue;
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107
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108 if (stat(ent->mnt_dir, &st2) == 0 &&
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109 CMP_DEV_T(st.st_dev, st2.st_dev)) {
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110 device_path = ent->mnt_fsname;
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111 mount_path = ent->mnt_dir;
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112 type = ent->mnt_type;
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113 break;
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114 }
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115 }
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116 endmntent(f);
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117 #endif
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118 if (device_path == NULL)
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119 return 0;
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120
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121 point_r->device_path = p_strdup(pool, device_path);
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122 point_r->mount_path = p_strdup(pool, mount_path);
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123 point_r->type = p_strdup(pool, type);
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124 point_r->block_size = block_size;
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125 return 1;
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126 #endif
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127 }