mirror of
https://github.com/sheumann/hush.git
synced 2024-12-21 23:29:34 +00:00
mount: reorder things, fix NFS-less mount.
This commit is contained in:
Denis Vlasenko
parent
215c61d3c2
commit
30a64cdc95
@ -25,6 +25,16 @@
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#include "busybox.h"
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#include <mntent.h>
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/* Needed for nfs support only... */
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#include <syslog.h>
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#include <sys/utsname.h>
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#undef TRUE
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#undef FALSE
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#include <rpc/rpc.h>
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#include <rpc/pmap_prot.h>
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#include <rpc/pmap_clnt.h>
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// Not real flags, but we want to be able to check for this.
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#define MOUNT_NOAUTO (1<<29)
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#define MOUNT_SWAP (1<<30)
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@ -86,7 +96,7 @@ struct {
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{"remount", MS_REMOUNT}, // action flag
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};
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static int nfsmount(struct mntent *mp, int vfsflags, char *filteropts);
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/* Append mount options to string */
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static void append_mount_options(char **oldopts, char *newopts)
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@ -272,349 +282,6 @@ static int mount_it_now(struct mntent *mp, int vfsflags, char *filteropts)
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return rc;
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}
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// Mount one directory. Handles CIFS, NFS, loopback, autobind, and filesystem
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// type detection. Returns 0 for success, nonzero for failure.
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static int singlemount(struct mntent *mp, int ignore_busy)
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{
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int rc = -1, vfsflags;
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char *loopFile = 0, *filteropts = 0;
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llist_t *fl = 0;
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struct stat st;
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vfsflags = parse_mount_options(mp->mnt_opts, &filteropts);
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// Treat fstype "auto" as unspecified.
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if (mp->mnt_type && !strcmp(mp->mnt_type,"auto")) mp->mnt_type = 0;
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// Might this be an CIFS filesystem?
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if(ENABLE_FEATURE_MOUNT_CIFS &&
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(!mp->mnt_type || !strcmp(mp->mnt_type,"cifs")) &&
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(mp->mnt_fsname[0]==mp->mnt_fsname[1] && (mp->mnt_fsname[0]=='/' || mp->mnt_fsname[0]=='\\')))
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{
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struct hostent *he;
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char ip[32], *s;
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rc = 1;
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// Replace '/' with '\' and verify that unc points to "//server/share".
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for (s = mp->mnt_fsname; *s; ++s)
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if (*s == '/') *s = '\\';
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// get server IP
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s = strrchr(mp->mnt_fsname, '\\');
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if (s == mp->mnt_fsname+1) goto report_error;
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*s = 0;
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he = gethostbyname(mp->mnt_fsname+2);
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*s = '\\';
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if (!he) goto report_error;
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// Insert ip=... option into string flags. (NOTE: Add IPv6 support.)
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sprintf(ip, "ip=%d.%d.%d.%d", he->h_addr[0], he->h_addr[1],
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he->h_addr[2], he->h_addr[3]);
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parse_mount_options(ip, &filteropts);
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// compose new unc '\\server-ip\share'
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s = xasprintf("\\\\%s%s",ip+3,strchr(mp->mnt_fsname+2,'\\'));
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if (ENABLE_FEATURE_CLEAN_UP) free(mp->mnt_fsname);
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mp->mnt_fsname = s;
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// lock is required
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vfsflags |= MS_MANDLOCK;
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mp->mnt_type = "cifs";
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rc = mount_it_now(mp, vfsflags, filteropts);
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goto report_error;
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}
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// Might this be an NFS filesystem?
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if (ENABLE_FEATURE_MOUNT_NFS &&
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(!mp->mnt_type || !strcmp(mp->mnt_type,"nfs")) &&
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strchr(mp->mnt_fsname, ':') != NULL)
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{
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rc = nfsmount(mp, vfsflags, filteropts);
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goto report_error;
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}
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// Look at the file. (Not found isn't a failure for remount, or for
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// a synthetic filesystem like proc or sysfs.)
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if (!lstat(mp->mnt_fsname, &st) && !(vfsflags & (MS_REMOUNT | MS_BIND | MS_MOVE)))
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{
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// Do we need to allocate a loopback device for it?
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if (ENABLE_FEATURE_MOUNT_LOOP && S_ISREG(st.st_mode)) {
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loopFile = bb_simplify_path(mp->mnt_fsname);
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mp->mnt_fsname = 0;
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switch(set_loop(&(mp->mnt_fsname), loopFile, 0)) {
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case 0:
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case 1:
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break;
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default:
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bb_error_msg( errno == EPERM || errno == EACCES
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? bb_msg_perm_denied_are_you_root
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: "cannot setup loop device");
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return errno;
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}
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// Autodetect bind mounts
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} else if (S_ISDIR(st.st_mode) && !mp->mnt_type)
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vfsflags |= MS_BIND;
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}
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/* If we know the fstype (or don't need to), jump straight
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* to the actual mount. */
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if (mp->mnt_type || (vfsflags & (MS_REMOUNT | MS_BIND | MS_MOVE)))
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rc = mount_it_now(mp, vfsflags, filteropts);
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// Loop through filesystem types until mount succeeds or we run out
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else {
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/* Initialize list of block backed filesystems. This has to be
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* done here so that during "mount -a", mounts after /proc shows up
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* can autodetect. */
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if (!fslist) {
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fslist = get_block_backed_filesystems();
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if (ENABLE_FEATURE_CLEAN_UP && fslist)
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atexit(delete_block_backed_filesystems);
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}
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for (fl = fslist; fl; fl = fl->link) {
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mp->mnt_type = fl->data;
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if (!(rc = mount_it_now(mp,vfsflags, filteropts))) break;
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mp->mnt_type = 0;
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}
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}
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// If mount failed, clean up loop file (if any).
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if (ENABLE_FEATURE_MOUNT_LOOP && rc && loopFile) {
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del_loop(mp->mnt_fsname);
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if (ENABLE_FEATURE_CLEAN_UP) {
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free(loopFile);
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free(mp->mnt_fsname);
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}
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}
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report_error:
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if (ENABLE_FEATURE_CLEAN_UP) free(filteropts);
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if (rc && errno == EBUSY && ignore_busy) rc = 0;
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if (rc < 0)
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/* perror here sometimes says "mounting ... on ... failed: Success" */
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bb_error_msg("mounting %s on %s failed", mp->mnt_fsname, mp->mnt_dir);
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return rc;
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}
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// Parse options, if necessary parse fstab/mtab, and call singlemount for
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// each directory to be mounted.
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int mount_main(int argc, char **argv)
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{
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char *cmdopts = xstrdup(""), *fstabname, *fstype=0, *storage_path=0;
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FILE *fstab;
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int i, opt, all = FALSE, rc = 0;
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struct mntent mtpair[2], *mtcur = mtpair;
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/* parse long options, like --bind and --move. Note that -o option
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* and --option are synonymous. Yes, this means --remount,rw works. */
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for (i = opt = 0; i < argc; i++) {
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if (argv[i][0] == '-' && argv[i][1] == '-') {
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append_mount_options(&cmdopts,argv[i]+2);
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} else argv[opt++] = argv[i];
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}
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argc = opt;
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// Parse remaining options
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while ((opt = getopt(argc, argv, "o:t:rwavnf")) > 0) {
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switch (opt) {
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case 'o':
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append_mount_options(&cmdopts, optarg);
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break;
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case 't':
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fstype = optarg;
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break;
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case 'r':
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append_mount_options(&cmdopts, "ro");
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break;
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case 'w':
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append_mount_options(&cmdopts, "rw");
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break;
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case 'a':
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all = TRUE;
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break;
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case 'n':
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USE_FEATURE_MTAB_SUPPORT(useMtab = FALSE;)
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break;
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case 'f':
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USE_FEATURE_MTAB_SUPPORT(fakeIt = FALSE;)
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break;
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case 'v':
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break; // ignore -v
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default:
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bb_show_usage();
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}
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}
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// Three or more non-option arguments? Die with a usage message.
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if (optind-argc>2) bb_show_usage();
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// If we have no arguments, show currently mounted filesystems
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if (optind == argc) {
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if (!all) {
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FILE *mountTable = setmntent(bb_path_mtab_file, "r");
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if(!mountTable) bb_error_msg_and_die("no %s",bb_path_mtab_file);
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while (getmntent_r(mountTable,mtpair,bb_common_bufsiz1,
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sizeof(bb_common_bufsiz1)))
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{
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// Don't show rootfs.
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if (!strcmp(mtpair->mnt_fsname, "rootfs")) continue;
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if (!fstype || !strcmp(mtpair->mnt_type, fstype))
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printf("%s on %s type %s (%s)\n", mtpair->mnt_fsname,
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mtpair->mnt_dir, mtpair->mnt_type,
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mtpair->mnt_opts);
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}
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if (ENABLE_FEATURE_CLEAN_UP) endmntent(mountTable);
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return EXIT_SUCCESS;
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}
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} else storage_path = bb_simplify_path(argv[optind]);
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// When we have two arguments, the second is the directory and we can
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// skip looking at fstab entirely. We can always abspath() the directory
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// argument when we get it.
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if (optind+2 == argc) {
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mtpair->mnt_fsname = argv[optind];
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mtpair->mnt_dir = argv[optind+1];
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mtpair->mnt_type = fstype;
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mtpair->mnt_opts = cmdopts;
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rc = singlemount(mtpair, 0);
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goto clean_up;
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}
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// If we have a shared subtree flag, don't worry about fstab or mtab.
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i = parse_mount_options(cmdopts,0);
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if (ENABLE_FEATURE_MOUNT_FLAGS &&
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(i & (MS_SHARED | MS_PRIVATE | MS_SLAVE | MS_UNBINDABLE )))
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{
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rc = mount("", argv[optind], "", i, "");
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if (rc) bb_perror_msg_and_die("%s", argv[optind]);
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goto clean_up;
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}
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// Open either fstab or mtab
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if (parse_mount_options(cmdopts,0) & MS_REMOUNT)
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fstabname = bb_path_mtab_file;
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else fstabname="/etc/fstab";
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if (!(fstab=setmntent(fstabname,"r")))
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bb_perror_msg_and_die("cannot read %s",fstabname);
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// Loop through entries until we find what we're looking for.
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memset(mtpair,0,sizeof(mtpair));
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for (;;) {
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struct mntent *mtnext = mtpair + (mtcur==mtpair ? 1 : 0);
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// Get next fstab entry
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if (!getmntent_r(fstab, mtcur, bb_common_bufsiz1
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+ (mtcur==mtpair ? sizeof(bb_common_bufsiz1)/2 : 0),
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sizeof(bb_common_bufsiz1)/2))
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{
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// Were we looking for something specific?
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if (optind != argc) {
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// If we didn't find anything, complain.
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if (!mtnext->mnt_fsname)
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bb_error_msg_and_die("can't find %s in %s",
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argv[optind], fstabname);
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// Mount the last thing we found.
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mtcur = mtnext;
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mtcur->mnt_opts = xstrdup(mtcur->mnt_opts);
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append_mount_options(&(mtcur->mnt_opts),cmdopts);
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rc = singlemount(mtcur, 0);
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free(mtcur->mnt_opts);
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}
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goto clean_up;
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}
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/* If we're trying to mount something specific and this isn't it,
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* skip it. Note we must match both the exact text in fstab (ala
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* "proc") or a full path from root */
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if (optind != argc) {
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// Is this what we're looking for?
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if(strcmp(argv[optind],mtcur->mnt_fsname) &&
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strcmp(storage_path,mtcur->mnt_fsname) &&
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strcmp(argv[optind],mtcur->mnt_dir) &&
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strcmp(storage_path,mtcur->mnt_dir)) continue;
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// Remember this entry. Something later may have overmounted
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// it, and we want the _last_ match.
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mtcur = mtnext;
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// If we're mounting all.
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} else {
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// Do we need to match a filesystem type?
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if (fstype && strcmp(mtcur->mnt_type,fstype)) continue;
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// Skip noauto and swap anyway.
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if (parse_mount_options(mtcur->mnt_opts,0)
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& (MOUNT_NOAUTO | MOUNT_SWAP)) continue;
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// Mount this thing.
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if (singlemount(mtcur, 1)) {
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/* Count number of failed mounts */
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rc++;
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}
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}
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}
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if (ENABLE_FEATURE_CLEAN_UP) endmntent(fstab);
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clean_up:
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if (ENABLE_FEATURE_CLEAN_UP) {
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free(storage_path);
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free(cmdopts);
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}
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return rc;
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}
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#if ENABLE_FEATURE_MOUNT_NFS
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/*
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@ -639,17 +306,9 @@ clean_up:
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* plus NFSv3 stuff.
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*/
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#include <syslog.h>
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#include <sys/utsname.h>
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#undef TRUE
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#undef FALSE
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#include <rpc/rpc.h>
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#include <rpc/pmap_prot.h>
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#include <rpc/pmap_clnt.h>
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/* This is just a warning of a common mistake. Possibly this should be a
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* uclibc faq entry rather than in busybox... */
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#if ENABLE_FEATURE_MOUNT_NFS && defined(__UCLIBC__) && ! defined(__UCLIBC_HAS_RPC__)
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#if defined(__UCLIBC__) && ! defined(__UCLIBC_HAS_RPC__)
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#error "You need to build uClibc with UCLIBC_HAS_RPC for NFS support."
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#endif
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@ -1314,25 +973,6 @@ static int nfsmount(struct mntent *mp, int vfsflags, char *filteropts)
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if (!data.timeo)
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data.timeo = tcp ? 70 : 7;
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#ifdef NFS_MOUNT_DEBUG
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printf("rsize = %d, wsize = %d, timeo = %d, retrans = %d\n",
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data.rsize, data.wsize, data.timeo, data.retrans);
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printf("acreg (min, max) = (%d, %d), acdir (min, max) = (%d, %d)\n",
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data.acregmin, data.acregmax, data.acdirmin, data.acdirmax);
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printf("port = %d, bg = %d, retry = %d, flags = %.8x\n",
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port, bg, retry, data.flags);
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printf("mountprog = %d, mountvers = %d, nfsprog = %d, nfsvers = %d\n",
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mountprog, mountvers, nfsprog, nfsvers);
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printf("soft = %d, intr = %d, posix = %d, nocto = %d, noac = %d\n",
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(data.flags & NFS_MOUNT_SOFT) != 0,
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(data.flags & NFS_MOUNT_INTR) != 0,
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(data.flags & NFS_MOUNT_POSIX) != 0,
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(data.flags & NFS_MOUNT_NOCTO) != 0,
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(data.flags & NFS_MOUNT_NOAC) != 0);
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printf("tcp = %d\n",
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(data.flags & NFS_MOUNT_TCP) != 0);
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#endif
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data.version = nfs_mount_version;
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if (vfsflags & MS_REMOUNT)
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@ -1559,14 +1199,7 @@ prepare_kernel_data:
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tcp ? IPPROTO_TCP : IPPROTO_UDP);
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if (port == 0)
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port = NFS_PORT;
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#ifdef NFS_MOUNT_DEBUG
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else
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printf("used portmapper to find NFS port\n");
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#endif
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}
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#ifdef NFS_MOUNT_DEBUG
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printf("using port %d for nfs daemon\n", port);
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#endif
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server_addr.sin_port = htons(port);
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/* prepare data structure for kernel */
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@ -1625,4 +1258,351 @@ ret:
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return retval;
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}
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#endif /* ENABLE_FEATURE_MOUNT_NFS */
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#else /* !ENABLE_FEATURE_MOUNT_NFS */
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/* Never called. Call should be optimized out. */
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int nfsmount(struct mntent *mp, int vfsflags, char *filteropts);
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#endif /* !ENABLE_FEATURE_MOUNT_NFS */
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// Mount one directory. Handles CIFS, NFS, loopback, autobind, and filesystem
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// type detection. Returns 0 for success, nonzero for failure.
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static int singlemount(struct mntent *mp, int ignore_busy)
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{
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int rc = -1, vfsflags;
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char *loopFile = 0, *filteropts = 0;
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llist_t *fl = 0;
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struct stat st;
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vfsflags = parse_mount_options(mp->mnt_opts, &filteropts);
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// Treat fstype "auto" as unspecified.
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|
||||
if (mp->mnt_type && !strcmp(mp->mnt_type,"auto")) mp->mnt_type = 0;
|
||||
|
||||
// Might this be an CIFS filesystem?
|
||||
|
||||
if(ENABLE_FEATURE_MOUNT_CIFS &&
|
||||
(!mp->mnt_type || !strcmp(mp->mnt_type,"cifs")) &&
|
||||
(mp->mnt_fsname[0]==mp->mnt_fsname[1] && (mp->mnt_fsname[0]=='/' || mp->mnt_fsname[0]=='\\')))
|
||||
{
|
||||
struct hostent *he;
|
||||
char ip[32], *s;
|
||||
|
||||
rc = 1;
|
||||
// Replace '/' with '\' and verify that unc points to "//server/share".
|
||||
|
||||
for (s = mp->mnt_fsname; *s; ++s)
|
||||
if (*s == '/') *s = '\\';
|
||||
|
||||
// get server IP
|
||||
|
||||
s = strrchr(mp->mnt_fsname, '\\');
|
||||
if (s == mp->mnt_fsname+1) goto report_error;
|
||||
*s = 0;
|
||||
he = gethostbyname(mp->mnt_fsname+2);
|
||||
*s = '\\';
|
||||
if (!he) goto report_error;
|
||||
|
||||
// Insert ip=... option into string flags. (NOTE: Add IPv6 support.)
|
||||
|
||||
sprintf(ip, "ip=%d.%d.%d.%d", he->h_addr[0], he->h_addr[1],
|
||||
he->h_addr[2], he->h_addr[3]);
|
||||
parse_mount_options(ip, &filteropts);
|
||||
|
||||
// compose new unc '\\server-ip\share'
|
||||
|
||||
s = xasprintf("\\\\%s%s",ip+3,strchr(mp->mnt_fsname+2,'\\'));
|
||||
if (ENABLE_FEATURE_CLEAN_UP) free(mp->mnt_fsname);
|
||||
mp->mnt_fsname = s;
|
||||
|
||||
// lock is required
|
||||
vfsflags |= MS_MANDLOCK;
|
||||
|
||||
mp->mnt_type = "cifs";
|
||||
rc = mount_it_now(mp, vfsflags, filteropts);
|
||||
goto report_error;
|
||||
}
|
||||
|
||||
// Might this be an NFS filesystem?
|
||||
|
||||
if (ENABLE_FEATURE_MOUNT_NFS &&
|
||||
(!mp->mnt_type || !strcmp(mp->mnt_type,"nfs")) &&
|
||||
strchr(mp->mnt_fsname, ':') != NULL)
|
||||
{
|
||||
rc = nfsmount(mp, vfsflags, filteropts);
|
||||
goto report_error;
|
||||
}
|
||||
|
||||
// Look at the file. (Not found isn't a failure for remount, or for
|
||||
// a synthetic filesystem like proc or sysfs.)
|
||||
|
||||
if (!lstat(mp->mnt_fsname, &st) && !(vfsflags & (MS_REMOUNT | MS_BIND | MS_MOVE)))
|
||||
{
|
||||
// Do we need to allocate a loopback device for it?
|
||||
|
||||
if (ENABLE_FEATURE_MOUNT_LOOP && S_ISREG(st.st_mode)) {
|
||||
loopFile = bb_simplify_path(mp->mnt_fsname);
|
||||
mp->mnt_fsname = 0;
|
||||
switch(set_loop(&(mp->mnt_fsname), loopFile, 0)) {
|
||||
case 0:
|
||||
case 1:
|
||||
break;
|
||||
default:
|
||||
bb_error_msg( errno == EPERM || errno == EACCES
|
||||
? bb_msg_perm_denied_are_you_root
|
||||
: "cannot setup loop device");
|
||||
return errno;
|
||||
}
|
||||
|
||||
// Autodetect bind mounts
|
||||
|
||||
} else if (S_ISDIR(st.st_mode) && !mp->mnt_type)
|
||||
vfsflags |= MS_BIND;
|
||||
}
|
||||
|
||||
/* If we know the fstype (or don't need to), jump straight
|
||||
* to the actual mount. */
|
||||
|
||||
if (mp->mnt_type || (vfsflags & (MS_REMOUNT | MS_BIND | MS_MOVE)))
|
||||
rc = mount_it_now(mp, vfsflags, filteropts);
|
||||
|
||||
// Loop through filesystem types until mount succeeds or we run out
|
||||
|
||||
else {
|
||||
|
||||
/* Initialize list of block backed filesystems. This has to be
|
||||
* done here so that during "mount -a", mounts after /proc shows up
|
||||
* can autodetect. */
|
||||
|
||||
if (!fslist) {
|
||||
fslist = get_block_backed_filesystems();
|
||||
if (ENABLE_FEATURE_CLEAN_UP && fslist)
|
||||
atexit(delete_block_backed_filesystems);
|
||||
}
|
||||
|
||||
for (fl = fslist; fl; fl = fl->link) {
|
||||
mp->mnt_type = fl->data;
|
||||
|
||||
if (!(rc = mount_it_now(mp,vfsflags, filteropts))) break;
|
||||
|
||||
mp->mnt_type = 0;
|
||||
}
|
||||
}
|
||||
|
||||
// If mount failed, clean up loop file (if any).
|
||||
|
||||
if (ENABLE_FEATURE_MOUNT_LOOP && rc && loopFile) {
|
||||
del_loop(mp->mnt_fsname);
|
||||
if (ENABLE_FEATURE_CLEAN_UP) {
|
||||
free(loopFile);
|
||||
free(mp->mnt_fsname);
|
||||
}
|
||||
}
|
||||
|
||||
report_error:
|
||||
if (ENABLE_FEATURE_CLEAN_UP) free(filteropts);
|
||||
|
||||
if (rc && errno == EBUSY && ignore_busy) rc = 0;
|
||||
if (rc < 0)
|
||||
/* perror here sometimes says "mounting ... on ... failed: Success" */
|
||||
bb_error_msg("mounting %s on %s failed", mp->mnt_fsname, mp->mnt_dir);
|
||||
|
||||
return rc;
|
||||
}
|
||||
|
||||
// Parse options, if necessary parse fstab/mtab, and call singlemount for
|
||||
// each directory to be mounted.
|
||||
|
||||
int mount_main(int argc, char **argv)
|
||||
{
|
||||
char *cmdopts = xstrdup(""), *fstabname, *fstype=0, *storage_path=0;
|
||||
FILE *fstab;
|
||||
int i, opt, all = FALSE, rc = 0;
|
||||
struct mntent mtpair[2], *mtcur = mtpair;
|
||||
|
||||
/* parse long options, like --bind and --move. Note that -o option
|
||||
* and --option are synonymous. Yes, this means --remount,rw works. */
|
||||
|
||||
for (i = opt = 0; i < argc; i++) {
|
||||
if (argv[i][0] == '-' && argv[i][1] == '-') {
|
||||
append_mount_options(&cmdopts,argv[i]+2);
|
||||
} else argv[opt++] = argv[i];
|
||||
}
|
||||
argc = opt;
|
||||
|
||||
// Parse remaining options
|
||||
|
||||
while ((opt = getopt(argc, argv, "o:t:rwavnf")) > 0) {
|
||||
switch (opt) {
|
||||
case 'o':
|
||||
append_mount_options(&cmdopts, optarg);
|
||||
break;
|
||||
case 't':
|
||||
fstype = optarg;
|
||||
break;
|
||||
case 'r':
|
||||
append_mount_options(&cmdopts, "ro");
|
||||
break;
|
||||
case 'w':
|
||||
append_mount_options(&cmdopts, "rw");
|
||||
break;
|
||||
case 'a':
|
||||
all = TRUE;
|
||||
break;
|
||||
case 'n':
|
||||
USE_FEATURE_MTAB_SUPPORT(useMtab = FALSE;)
|
||||
break;
|
||||
case 'f':
|
||||
USE_FEATURE_MTAB_SUPPORT(fakeIt = FALSE;)
|
||||
break;
|
||||
case 'v':
|
||||
break; // ignore -v
|
||||
default:
|
||||
bb_show_usage();
|
||||
}
|
||||
}
|
||||
|
||||
// Three or more non-option arguments? Die with a usage message.
|
||||
|
||||
if (optind-argc>2) bb_show_usage();
|
||||
|
||||
// If we have no arguments, show currently mounted filesystems
|
||||
|
||||
if (optind == argc) {
|
||||
if (!all) {
|
||||
FILE *mountTable = setmntent(bb_path_mtab_file, "r");
|
||||
|
||||
if(!mountTable) bb_error_msg_and_die("no %s",bb_path_mtab_file);
|
||||
|
||||
while (getmntent_r(mountTable,mtpair,bb_common_bufsiz1,
|
||||
sizeof(bb_common_bufsiz1)))
|
||||
{
|
||||
// Don't show rootfs.
|
||||
if (!strcmp(mtpair->mnt_fsname, "rootfs")) continue;
|
||||
|
||||
if (!fstype || !strcmp(mtpair->mnt_type, fstype))
|
||||
printf("%s on %s type %s (%s)\n", mtpair->mnt_fsname,
|
||||
mtpair->mnt_dir, mtpair->mnt_type,
|
||||
mtpair->mnt_opts);
|
||||
}
|
||||
if (ENABLE_FEATURE_CLEAN_UP) endmntent(mountTable);
|
||||
return EXIT_SUCCESS;
|
||||
}
|
||||
} else storage_path = bb_simplify_path(argv[optind]);
|
||||
|
||||
// When we have two arguments, the second is the directory and we can
|
||||
// skip looking at fstab entirely. We can always abspath() the directory
|
||||
// argument when we get it.
|
||||
|
||||
if (optind+2 == argc) {
|
||||
mtpair->mnt_fsname = argv[optind];
|
||||
mtpair->mnt_dir = argv[optind+1];
|
||||
mtpair->mnt_type = fstype;
|
||||
mtpair->mnt_opts = cmdopts;
|
||||
rc = singlemount(mtpair, 0);
|
||||
goto clean_up;
|
||||
}
|
||||
|
||||
// If we have a shared subtree flag, don't worry about fstab or mtab.
|
||||
i = parse_mount_options(cmdopts,0);
|
||||
if (ENABLE_FEATURE_MOUNT_FLAGS &&
|
||||
(i & (MS_SHARED | MS_PRIVATE | MS_SLAVE | MS_UNBINDABLE )))
|
||||
{
|
||||
rc = mount("", argv[optind], "", i, "");
|
||||
if (rc) bb_perror_msg_and_die("%s", argv[optind]);
|
||||
goto clean_up;
|
||||
}
|
||||
|
||||
// Open either fstab or mtab
|
||||
|
||||
if (parse_mount_options(cmdopts,0) & MS_REMOUNT)
|
||||
fstabname = bb_path_mtab_file;
|
||||
else fstabname="/etc/fstab";
|
||||
|
||||
if (!(fstab=setmntent(fstabname,"r")))
|
||||
bb_perror_msg_and_die("cannot read %s",fstabname);
|
||||
|
||||
// Loop through entries until we find what we're looking for.
|
||||
|
||||
memset(mtpair,0,sizeof(mtpair));
|
||||
for (;;) {
|
||||
struct mntent *mtnext = mtpair + (mtcur==mtpair ? 1 : 0);
|
||||
|
||||
// Get next fstab entry
|
||||
|
||||
if (!getmntent_r(fstab, mtcur, bb_common_bufsiz1
|
||||
+ (mtcur==mtpair ? sizeof(bb_common_bufsiz1)/2 : 0),
|
||||
sizeof(bb_common_bufsiz1)/2))
|
||||
{
|
||||
// Were we looking for something specific?
|
||||
|
||||
if (optind != argc) {
|
||||
|
||||
// If we didn't find anything, complain.
|
||||
|
||||
if (!mtnext->mnt_fsname)
|
||||
bb_error_msg_and_die("can't find %s in %s",
|
||||
argv[optind], fstabname);
|
||||
|
||||
// Mount the last thing we found.
|
||||
|
||||
mtcur = mtnext;
|
||||
mtcur->mnt_opts = xstrdup(mtcur->mnt_opts);
|
||||
append_mount_options(&(mtcur->mnt_opts),cmdopts);
|
||||
rc = singlemount(mtcur, 0);
|
||||
free(mtcur->mnt_opts);
|
||||
}
|
||||
goto clean_up;
|
||||
}
|
||||
|
||||
/* If we're trying to mount something specific and this isn't it,
|
||||
* skip it. Note we must match both the exact text in fstab (ala
|
||||
* "proc") or a full path from root */
|
||||
|
||||
if (optind != argc) {
|
||||
|
||||
// Is this what we're looking for?
|
||||
|
||||
if(strcmp(argv[optind],mtcur->mnt_fsname) &&
|
||||
strcmp(storage_path,mtcur->mnt_fsname) &&
|
||||
strcmp(argv[optind],mtcur->mnt_dir) &&
|
||||
strcmp(storage_path,mtcur->mnt_dir)) continue;
|
||||
|
||||
// Remember this entry. Something later may have overmounted
|
||||
// it, and we want the _last_ match.
|
||||
|
||||
mtcur = mtnext;
|
||||
|
||||
// If we're mounting all.
|
||||
|
||||
} else {
|
||||
|
||||
// Do we need to match a filesystem type?
|
||||
if (fstype && strcmp(mtcur->mnt_type,fstype)) continue;
|
||||
|
||||
// Skip noauto and swap anyway.
|
||||
|
||||
if (parse_mount_options(mtcur->mnt_opts,0)
|
||||
& (MOUNT_NOAUTO | MOUNT_SWAP)) continue;
|
||||
|
||||
// Mount this thing.
|
||||
|
||||
if (singlemount(mtcur, 1)) {
|
||||
/* Count number of failed mounts */
|
||||
rc++;
|
||||
}
|
||||
}
|
||||
}
|
||||
if (ENABLE_FEATURE_CLEAN_UP) endmntent(fstab);
|
||||
|
||||
clean_up:
|
||||
|
||||
if (ENABLE_FEATURE_CLEAN_UP) {
|
||||
free(storage_path);
|
||||
free(cmdopts);
|
||||
}
|
||||
|
||||
return rc;
|
||||
}
|
||||
|
||||
Loading…
Reference in New Issue
Block a user