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/* vi: set sw=4 ts=4: */
#include <stdlib.h>
#include <unistd.h>
#include <errno.h>
#include <string.h>
#include <stdio.h>
#include <mntent.h>
#include "libbb.h"
extern const char mtab_file[]; /* Defined in utility.c */
static const int MS_RDONLY = 1; /* Mount read-only. */
void erase_mtab(const char *name)
{
struct mntent entries[20];
int count = 0;
FILE *mountTable = setmntent(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) {
perror_msg("%s", mtab_file);
return;
}
while ((m = getmntent(mountTable)) != 0) {
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(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)
perror_msg("%s", mtab_file);
}
void write_mtab(char *blockDevice, char *directory,
char *filesystemType, long flags, char *string_flags)
{
FILE *mountTable = setmntent(mtab_file, "a+");
struct mntent m;
if (mountTable == 0) {
perror_msg("%s", mtab_file);
return;
}
if (mountTable) {
int length = strlen(directory);
if (length > 1 && directory[length - 1] == '/')
directory[length - 1] = '\0';
if (filesystemType == 0) {
struct mntent *p = find_mount_point(blockDevice, "/proc/mounts");
if (p && p->mnt_type)
filesystemType = p->mnt_type;
}
m.mnt_fsname = blockDevice;
m.mnt_dir = directory;
m.mnt_type = filesystemType ? filesystemType : "default";
if (*string_flags) {
m.mnt_opts = string_flags;
} else {
if ((flags | MS_RDONLY) == flags)
m.mnt_opts = "ro";
else
m.mnt_opts = "rw";
}
m.mnt_freq = 0;
m.mnt_passno = 0;
addmntent(mountTable, &m);
endmntent(mountTable);
}
}
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