mirror of
https://git.busybox.net/busybox.git
synced 2024-12-05 03:23:26 +08:00
114 lines
2.6 KiB
C
114 lines
2.6 KiB
C
#include "internal.h"
|
|
#include <stdlib.h>
|
|
#include <unistd.h>
|
|
#include <errno.h>
|
|
#include <string.h>
|
|
#include <stdio.h>
|
|
#include <mntent.h>
|
|
#include <sys/mount.h>
|
|
|
|
extern const char mtab_file[]; /* Defined in utility.c */
|
|
|
|
static char *
|
|
stralloc(const char * string)
|
|
{
|
|
int length = strlen(string) + 1;
|
|
char * n = malloc(length);
|
|
memcpy(n, string, length);
|
|
return n;
|
|
}
|
|
|
|
extern 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
|
|
#if ! defined BB_FEATURE_USE_PROCFS
|
|
) {
|
|
#else
|
|
/* Bummer. fall back on trying the /proc filesystem */
|
|
&& (mountTable = setmntent("/proc/mounts", "r")) == 0 ) {
|
|
#endif
|
|
perror(mtab_file);
|
|
return;
|
|
}
|
|
|
|
while ( (m = getmntent(mountTable)) != 0 ) {
|
|
entries[count].mnt_fsname = stralloc(m->mnt_fsname);
|
|
entries[count].mnt_dir = stralloc(m->mnt_dir);
|
|
entries[count].mnt_type = stralloc(m->mnt_type);
|
|
entries[count].mnt_opts = stralloc(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(mtab_file);
|
|
}
|
|
|
|
extern 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(mtab_file);
|
|
return;
|
|
}
|
|
if (mountTable) {
|
|
int length = strlen(directory);
|
|
|
|
if ( length > 1 && directory[length - 1] == '/' )
|
|
directory[length - 1] = '\0';
|
|
|
|
#ifdef BB_FEATURE_USE_PROCFS
|
|
if ( filesystemType == 0 ) {
|
|
struct mntent *p = findMountPoint(blockDevice, "/proc/mounts");
|
|
|
|
if ( p && p->mnt_type )
|
|
filesystemType = p->mnt_type;
|
|
}
|
|
#endif
|
|
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);
|
|
}
|
|
}
|
|
|
|
|