-int del_mtab(const char *spec, const char *node, const char *type,
- const char *opts, struct mntentchn *mc)
-{
- int umnt_err, umnt_err2, res;
-
- umnt_err = umnt_err2 = 0;
- if (lazy) {
- res = umount2 (node, MNT_DETACH);
- if (res < 0)
- umnt_err = errno;
- goto writemtab;
- }
-
- if (force) {
- res = umount2 (node, MNT_FORCE);
- if (res == -1) {
- int errsv = errno;
- perror("umount2");
- errno = errsv;
- if (errno == ENOSYS) {
- if (verbose)
- printf(_("no umount2, trying umount...\n"));
- res = umount (node);
- }
- }
- } else
- res = umount (node);
-
- if (res < 0) {
- umnt_err = errno;
- /* A device might have been mounted on a node that has since
- been deleted or renamed, so if node fails, also try spec. */
- /* Note that this is incorrect in case spec was mounted
- several times. */
- /* if (umnt_err == ENOENT || umnt_err == EINVAL) */
- if (umnt_err != EBUSY && strcmp(node, spec)) {
- if (verbose)
- printf (_("could not umount %s - trying %s instead\n"),
- node, spec);
- res = umount (spec);
- if (res < 0)
- umnt_err2 = errno;
- /* Do not complain about remote NFS mount points */
- if (errno == ENOENT && index(spec, ':'))
- umnt_err2 = 0;
- }
- }
-
- if (res < 0 && remount && (umnt_err == EBUSY || umnt_err2 == EBUSY)) {
- /* Umount failed - let us try a remount */
- res = mount(spec, node, NULL,
- MS_MGC_VAL | MS_REMOUNT | MS_RDONLY, NULL);
- if (res == 0) {
- nfs_mntent_t remnt;
- fprintf(stderr,
- _("umount: %s busy - remounted read-only\n"),
- spec);
- remnt.mnt_type = remnt.mnt_fsname = NULL;
- remnt.mnt_dir = xstrdup(node);
- remnt.mnt_opts = xstrdup("ro");
- if (!nomtab)
- update_mtab(node, &remnt);
- return 0;
- } else if (errno != EBUSY) { /* hmm ... */
- perror("remount");
- fprintf(stderr,
- _("umount: could not remount %s read-only\n"),
- spec);
- }
- }
-
- if (res >= 0) {
- /* Umount succeeded */
- if (verbose)
- printf (_("%s umounted\n"), spec);
- }