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/* mount.c - mount filesystems
*
* Copyright 2014 Rob Landley <rob@landley.net>
*
* See http://refspecs.linuxfoundation.org/LSB_4.1.0/LSB-Core-generic/LSB-Core-generic/mount.html
* Note: -hV is bad spec, haven't implemented -FsLU yet
* no mtab (/proc/mounts does it) so -n is NOP.
USE_MOUNT(NEWTOY(mount, ">2afnrvwt:o*[-rw]", TOYFLAG_USR|TOYFLAG_BIN|TOYFLAG_STAYROOT))
config MOUNT
bool "mount"
default n
help
usage: mount [-afFrsvw] [-t TYPE] [-o OPTIONS...] [[DEVICE] DIR]
Mount new filesystem(s) on directories. With no arguments, display existing
mounts.
-a mount all entries in /etc/fstab (with -t, only entries of that TYPE)
-f fake it (don't actually mount)
-r read only (same as -o ro)
-w read/write (default, same as -o rw)
-t specify filesystem type
-v verbose
OPTIONS is a comma separated list of options, which can also be supplied
as --longopts.
config MOUNT_AUTODETECT
help
usage: mount
This mount autodetects loopback mounts (a file on a directory) and
bind mounts (file on file, directory on directory), so you don't need
to say --bind or --loop.
*/
#define FOR_mount
#include "toys.h"
GLOBALS(
struct arg_list *optlist;
char *type;
unsigned long flags;
char *opts;
)
static void do_mount(char *dev, char *dir, char *type, unsigned long flags, char *opts)
{
FILE *fp = 0;
int rc = EINVAL;
if (toys.optflags & FLAG_f) return;
if (!TT.type) fp = xfopen("/proc/filesystems", "r");
for (;;) {
char *buf = 0;
// If type wasn't specified, try all of them in order.
if (fp) {
size_t i;
if (getline(&buf, &i, fp)<0) break;
type = buf;
// skip nodev devices
if (!isspace(*type)) {
free(buf);
continue;
}
// trim whitespace
while (isspace(*type)) type++;
i = strlen(type);
if (i) type[i-1] = 0;
}
rc = mount(dev, dir, type, flags, opts);
if (!fp || (rc && errno != EINVAL)) break;
free(buf);
}
if (fp) fclose(fp);
if (rc) perror_msg("'%s' on '%s'", dev, dir);
}
void mount_main(void)
{
if (toys.optflags & FLAG_a) {
fprintf(stderr, "not yet\n");
return;
}
// show mounts
if (!toys.optc) {
struct mtab_list *mtl = xgetmountlist(0), *m;
for (mtl = xgetmountlist(0); mtl && (m = dlist_pop(&mtl)); free(m)) {
char *s = 0;
if (TT.type && strcmp(TT.type, m->type)) continue;
if (*m->device == '/') s = xabspath(m->device, 0);
xprintf("%s on %s type %s (%s)\n",
s ? s : m->device, m->dir, m->type, m->opts);
free(s);
}
// one argument: from fstab, remount, subtree
} else if (toys.optc == 1) {
fprintf(stderr, "not yet\n");
return;
// two arguments
} else do_mount(toys.optargs[0], toys.optargs[1], TT.type, 0, "");
}
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