ubase/mount.c

135 lines
2.5 KiB
C

/* See LICENSE file for copyright and license details. */
#include <sys/mount.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <unistd.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "grabmntinfo.h"
#include "util.h"
struct {
const char *opt;
const char *notopt;
unsigned long v;
} optnames[] = {
{ "remount", NULL, MS_REMOUNT },
{ "ro", "rw", MS_RDONLY },
{ "sync", "async", MS_SYNCHRONOUS },
{ "dirsync", NULL, MS_DIRSYNC },
{ "nodev", "dev", MS_NODEV },
{ "noatime", "atime", MS_NOATIME },
{ "nodiratime", "diratime", MS_NODIRATIME },
{ "noexec", "exec", MS_NOEXEC },
{ "nosuid", "suid", MS_NOSUID },
{ "mand", "nomand", MS_MANDLOCK },
{ "relatime", "norelatime", MS_RELATIME },
{ NULL, NULL, 0 }
};
static void
usage(void)
{
eprintf("usage: %s [-BMRd] [-t fstype] [-o options] source target\n",
argv0);
}
int
main(int argc, char *argv[])
{
int i;
unsigned long flags = 0;
char *types = NULL, *opt = NULL, *p;
const char *source;
const char *target;
struct stat st1, st2;
int validopt;
void *data = NULL;
struct mntinfo *minfo = NULL;
int siz;
ARGBEGIN {
case 'B':
flags |= MS_BIND;
break;
case 'M':
flags |= MS_MOVE;
break;
case 'R':
flags |= MS_REC;
break;
case 'd':
data = EARGF(usage());
break;
case 'o':
opt = EARGF(usage());
p = strtok(opt, ",");
while (p) {
validopt = 0;
for (i = 0; optnames[i].v; i++) {
if (optnames[i].opt) {
if (!strcmp(p, optnames[i].opt)) {
flags |= optnames[i].v;
validopt = 1;
break;
}
}
if (optnames[i].notopt) {
if (!strcmp(p, optnames[i].notopt)) {
flags &= ~optnames[i].v;
validopt = 1;
break;
}
}
}
if (!validopt)
break;
p = strtok(NULL, ",");
}
if (!validopt)
enprintf(1, "unknown option: %s\n", p);
break;
case 't':
types = EARGF(usage());
break;
default:
usage();
} ARGEND;
if (argc < 1)
usage();
source = argv[0];
target = argv[1];
if (!target) {
target = source;
source = NULL;
if (stat(target, &st1) < 0)
eprintf("stat %s:", target);
siz = grabmntinfo(&minfo);
if (!siz)
eprintf("grabmntinfo:");
for (i = 0; i < siz; i++) {
if (stat(minfo[i].mntdir, &st2) < 0)
eprintf("stat %s:", minfo[i].mntdir);
if (st1.st_dev == st2.st_dev &&
st1.st_ino == st2.st_ino) {
source = minfo[i].fsname;
break;
}
}
if (!source)
enprintf(1, "can't find %s mountpoint\n",
target);
}
if (mount(source, target, types, flags, data) < 0)
eprintf("mount:");
free(minfo);
return 0;
}