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