1/* vi: set sw=4 ts=4: */ 2/* 3 * Utility routines. 4 * 5 * Copyright (C) 1999-2004 by Erik Andersen <andersen@codepoet.org> 6 * 7 * Licensed under GPLv2 or later, see file LICENSE in this tarball for details. 8 */ 9 10#include <mntent.h> 11#include "libbb.h" 12 13#if ENABLE_FEATURE_MTAB_SUPPORT 14void FAST_FUNC erase_mtab(const char *name) 15{ 16 struct mntent *entries; 17 int i, count; 18 FILE *mountTable; 19 struct mntent *m; 20 21 mountTable = setmntent(bb_path_mtab_file, "r"); 22 /* Bummer. Fall back on trying the /proc filesystem */ 23 if (!mountTable) mountTable = setmntent("/proc/mounts", "r"); 24 if (!mountTable) { 25 bb_perror_msg(bb_path_mtab_file); 26 return; 27 } 28 29 entries = NULL; 30 count = 0; 31 while ((m = getmntent(mountTable)) != 0) { 32 entries = xrealloc_vector(entries, 3, count); 33 entries[count].mnt_fsname = xstrdup(m->mnt_fsname); 34 entries[count].mnt_dir = xstrdup(m->mnt_dir); 35 entries[count].mnt_type = xstrdup(m->mnt_type); 36 entries[count].mnt_opts = xstrdup(m->mnt_opts); 37 entries[count].mnt_freq = m->mnt_freq; 38 entries[count].mnt_passno = m->mnt_passno; 39 count++; 40 } 41 endmntent(mountTable); 42 43//TODO: make update atomic 44 mountTable = setmntent(bb_path_mtab_file, "w"); 45 if (mountTable) { 46 for (i = 0; i < count; i++) { 47 if (strcmp(entries[i].mnt_fsname, name) != 0 48 && strcmp(entries[i].mnt_dir, name) != 0) 49 addmntent(mountTable, &entries[i]); 50 } 51 endmntent(mountTable); 52 } else if (errno != EROFS) 53 bb_perror_msg(bb_path_mtab_file); 54} 55#endif 56