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 source tree. 8 */ 9#include <mntent.h> 10#include "libbb.h" 11 12#if ENABLE_FEATURE_MTAB_SUPPORT 13void FAST_FUNC erase_mtab(const char *name) 14{ 15 struct mntent *entries; 16 int i, count; 17 FILE *mountTable; 18 struct mntent *m; 19 20 mountTable = setmntent(bb_path_mtab_file, "r"); 21 /* Bummer. Fall back on trying the /proc filesystem */ 22 if (!mountTable) mountTable = setmntent("/proc/mounts", "r"); 23 if (!mountTable) { 24 bb_perror_msg(bb_path_mtab_file); 25 return; 26 } 27 28 entries = NULL; 29 count = 0; 30 while ((m = getmntent(mountTable)) != 0) { 31 entries = xrealloc_vector(entries, 3, count); 32 entries[count].mnt_fsname = xstrdup(m->mnt_fsname); 33 entries[count].mnt_dir = xstrdup(m->mnt_dir); 34 entries[count].mnt_type = xstrdup(m->mnt_type); 35 entries[count].mnt_opts = xstrdup(m->mnt_opts); 36 entries[count].mnt_freq = m->mnt_freq; 37 entries[count].mnt_passno = m->mnt_passno; 38 count++; 39 } 40 endmntent(mountTable); 41 42//TODO: make update atomic 43 mountTable = setmntent(bb_path_mtab_file, "w"); 44 if (mountTable) { 45 for (i = 0; i < count; i++) { 46 if (strcmp(entries[i].mnt_fsname, name) != 0 47 && strcmp(entries[i].mnt_dir, name) != 0) 48 addmntent(mountTable, &entries[i]); 49 } 50 endmntent(mountTable); 51 } else if (errno != EROFS) 52 bb_perror_msg(bb_path_mtab_file); 53} 54#endif 55