diff options
| -rw-r--r-- | libbb/mtab.c | 53 |
1 files changed, 21 insertions, 32 deletions
diff --git a/libbb/mtab.c b/libbb/mtab.c index cce1aac..18386ef 100644 --- a/libbb/mtab.c +++ b/libbb/mtab.c @@ -7,53 +7,42 @@ * Licensed under GPLv2 or later, see file LICENSE in this tarball for details. */ -#include <stdlib.h> -#include <unistd.h> -#include <errno.h> -#include <string.h> -#include <stdio.h> #include <mntent.h> #include "libbb.h" -#define MTAB_MAX_ENTRIES 40 - -#ifdef CONFIG_FEATURE_MTAB_SUPPORT +#if ENABLE_FEATURE_MTAB_SUPPORT void erase_mtab(const char *name) { - struct mntent entries[MTAB_MAX_ENTRIES]; - int count = 0; - FILE *mountTable = setmntent(bb_path_mtab_file, "r"); + struct mntent *entries = NULL; + int i, count = 0; + FILE *mountTable; struct mntent *m; - /* Check if reading the mtab file failed */ - if (mountTable == 0 - /* Bummer. fall back on trying the /proc filesystem */ - && (mountTable = setmntent("/proc/mounts", "r")) == 0) { + mountTable = setmntent(bb_path_mtab_file, "r"); + /* Bummer. Fall back on trying the /proc filesystem */ + if (!mountTable) mountTable = setmntent("/proc/mounts", "r"); + if (!mountTable) { bb_perror_msg(bb_path_mtab_file); return; } - while (((m = getmntent(mountTable)) != 0) && (count < MTAB_MAX_ENTRIES)) - { - entries[count].mnt_fsname = strdup(m->mnt_fsname); - entries[count].mnt_dir = strdup(m->mnt_dir); - entries[count].mnt_type = strdup(m->mnt_type); - entries[count].mnt_opts = strdup(m->mnt_opts); - entries[count].mnt_freq = m->mnt_freq; - entries[count].mnt_passno = m->mnt_passno; - count++; + while ((m = getmntent(mountTable)) != 0) { + i = count++; + entries = xrealloc(entries, count * sizeof(entries[0])); + entries[i].mnt_fsname = xstrdup(m->mnt_fsname); + entries[i].mnt_dir = xstrdup(m->mnt_dir); + entries[i].mnt_type = xstrdup(m->mnt_type); + entries[i].mnt_opts = xstrdup(m->mnt_opts); + entries[i].mnt_freq = m->mnt_freq; + entries[i].mnt_passno = m->mnt_passno; } endmntent(mountTable); - if ((mountTable = setmntent(bb_path_mtab_file, "w"))) { - int i; + mountTable = setmntent(bb_path_mtab_file, "w"); + if (mountTable) { for (i = 0; i < count; i++) { - int result = (strcmp(entries[i].mnt_fsname, name) == 0 - || strcmp(entries[i].mnt_dir, name) == 0); - - if (result) - continue; - else + if (strcmp(entries[i].mnt_fsname, name) != 0 + && strcmp(entries[i].mnt_dir, name) != 0) addmntent(mountTable, &entries[i]); } endmntent(mountTable); |