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erase_mtab: do not limit ourself to 40 mtab entries

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This commit is contained in:
Denis Vlasenko 2006-11-27 17:29:09 +00:00
parent 097c324f59
commit f1a6c6b362
1 changed files with 21 additions and 32 deletions
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53
libbb/mtab.c
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@ -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);