/* 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 <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 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 *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) { 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++; } endmntent(mountTable); if ((mountTable = setmntent(bb_path_mtab_file, "w"))) { int i; 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 addmntent(mountTable, &entries[i]); } endmntent(mountTable); } else if (errno != EROFS) bb_perror_msg(bb_path_mtab_file); } #endif