diff options
Diffstat (limited to 'libbb/mtab.c')
-rw-r--r-- | libbb/mtab.c | 55 |
1 files changed, 55 insertions, 0 deletions
diff --git a/libbb/mtab.c b/libbb/mtab.c new file mode 100644 index 0000000..586a661 --- /dev/null +++ b/libbb/mtab.c @@ -0,0 +1,55 @@ +/* vi: set sw=4 ts=4: */ +/* + * Utility routines. + * + * Copyright (C) 1999-2004 by Erik Andersen <andersen@codepoet.org> + * + * Licensed under GPLv2 or later, see file LICENSE in this tarball for details. + */ + +#include <mntent.h> +#include "libbb.h" + +#if ENABLE_FEATURE_MTAB_SUPPORT +void FAST_FUNC erase_mtab(const char *name) +{ + struct mntent *entries; + int i, count; + FILE *mountTable; + struct mntent *m; + + 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; + } + + entries = NULL; + count = 0; + while ((m = getmntent(mountTable)) != 0) { + entries = xrealloc_vector(entries, 3, count); + entries[count].mnt_fsname = xstrdup(m->mnt_fsname); + entries[count].mnt_dir = xstrdup(m->mnt_dir); + entries[count].mnt_type = xstrdup(m->mnt_type); + entries[count].mnt_opts = xstrdup(m->mnt_opts); + entries[count].mnt_freq = m->mnt_freq; + entries[count].mnt_passno = m->mnt_passno; + count++; + } + endmntent(mountTable); + +//TODO: make update atomic + mountTable = setmntent(bb_path_mtab_file, "w"); + if (mountTable) { + for (i = 0; i < count; i++) { + if (strcmp(entries[i].mnt_fsname, name) != 0 + && strcmp(entries[i].mnt_dir, name) != 0) + addmntent(mountTable, &entries[i]); + } + endmntent(mountTable); + } else if (errno != EROFS) + bb_perror_msg(bb_path_mtab_file); +} +#endif |