*
*/
+#include <unistd.h>
#include <stdio.h>
#include <errno.h>
#include <getopt.h>
#include <mntent.h>
#include <sys/mount.h>
#include <ctype.h>
+#include <pwd.h>
#include "xcommon.h"
#include "fstab.h"
return res;
}
-struct mntentchn *
-getmntentchn(const char *dir)
-{
- mntFILE *mfp;
- nfs_mntent_t *mnt;
- struct mntentchn *mc = NULL;
-
- mfp = nfs_setmntent ("/proc/mounts", "r");
- if (mfp == NULL || mfp->mntent_fp == NULL)
- return NULL;
-
- while ((mnt = nfs_getmntent(mfp)) != NULL) {
- if(strcmp(mnt->mnt_fsname, dir) && strcmp(mnt->mnt_dir, dir))
- continue;
-
- if (!mc)
- mc = (struct mntentchn *)xmalloc(sizeof(*mc));
- mc->m = *mnt;
- }
-
- nfs_endmntent(mfp);
- return mc;
-}
-
/* complain about a failed umount */
static void complain(int err, const char *dev) {
switch (err) {
}
}
-int add_mtab2(const char *spec, const char *node, const char *type,
- const char *opts, struct mntentchn *mc)
+int del_mtab(const char *spec, const char *node)
{
- int umnt_err, umnt_err2, res;
+ int umnt_err, res;
- umnt_err = umnt_err2 = 0;
+ umnt_err = 0;
if (lazy) {
res = umount2 (node, MNT_DETACH);
if (res < 0)
} 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)) {
+ if (res < 0 && remount && errno == EBUSY && spec) {
/* 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;
+ struct mntent remnt;
fprintf(stderr,
_("umount: %s busy - remounted read-only\n"),
spec);
if (res >= 0) {
/* Umount succeeded */
if (verbose)
- printf (_("%s umounted\n"), spec);
+ printf (_("%s umounted\n"), spec ? spec : node);
}
writemtab:
if (!nomtab &&
(umnt_err == 0 || umnt_err == EINVAL || umnt_err == ENOENT)) {
- update_mtab (node, NULL);
+ update_mtab(node, NULL);
}
if (res >= 0)
return 0;
- if (umnt_err2)
- complain(umnt_err2, spec);
- if (umnt_err && umnt_err != umnt_err2)
+ if (umnt_err)
complain(umnt_err, node);
return 1;
}
/*
* Returns 1 if everything went well, else 0.
*/
-int _nfsumount(const char *spec, const char *opts)
+int _nfsumount(const char *spec, char *opts)
{
char *hostname;
char *dirname;
goto out_bad;
return nfs_call_umount(&mnt_server, &dirname);
out_bad:
- printf("%s: %s: not found or not mounted\n", progname, spec);
+ fprintf(stderr, "%s: %s: not found or not mounted\n", progname, spec);
return 0;
}
return 0;
}
}
+ if (optind != argc) {
+ umount_usage();
+ return 0;
+ }
if (spec == NULL || (*spec != '/' && strchr(spec,':') == NULL)) {
printf(_("umount: %s: not found\n"), spec);
return 0;
}
- mc = getmntentchn(spec);
- if (!mc)
+ if (*spec == '/')
mc = getmntdirbackward(spec, NULL);
- if (!mc)
+ else
mc = getmntdevbackward(spec, NULL);
if (!mc && verbose)
printf(_("Could not find %s in mtab\n"), spec);
- if(mc) {
- ret = _nfsumount(mc->m.mnt_fsname, mc->m.mnt_opts);
- if(ret)
- ret = add_mtab2(mc->m.mnt_fsname, mc->m.mnt_dir,
- mc->m.mnt_type, mc->m.mnt_opts, mc);
+ if (mc && strcmp(mc->m.mnt_type, "nfs") != 0 &&
+ strcmp(mc->m.mnt_type, "nfs4") != 0) {
+ fprintf(stderr, "umount.nfs: %s on %s it not an nfs filesystem\n",
+ mc->m.mnt_fsname, mc->m.mnt_dir);
+ exit(1);
}
- else {
- ret = _nfsumount(spec, NULL);
- if(ret)
- ret = add_mtab2(spec, spec, spec, spec, NULL);
+
+ if (getuid() != 0) {
+ /* only permitted if "user=" or "users" is in mount options */
+ if (!mc) {
+ only_root:
+ fprintf(stderr,"%s: You are not permitted to unmount %s\n",
+ progname, spec);
+ return 0;
+ }
+ if (hasmntopt(&mc->m, "users") == NULL) {
+ char *opt = hasmntopt(&mc->m, "user");
+ struct passwd *pw;
+ char *comma;
+ int len;
+ if (!opt)
+ goto only_root;
+ if (opt[5] != '=')
+ goto only_root;
+ comma = strchr(opt, ',');
+ if (comma)
+ len = comma - (opt + 5);
+ else
+ len = strlen(opt+5);
+ pw = getpwuid(getuid());
+ if (pw == NULL || strlen(pw->pw_name) != len
+ || strncmp(pw->pw_name, opt+5, len) != 0)
+ goto only_root;
+ }
}
+ ret = 0;
+ if (mc) {
+ if (!lazy)
+ ret = _nfsumount(mc->m.mnt_fsname, mc->m.mnt_opts);
+ if(ret)
+ ret = del_mtab(mc->m.mnt_fsname, mc->m.mnt_dir);
+ } else if (*spec != '/') {
+ if (!lazy)
+ ret = _nfsumount(spec, "tcp,v3");
+ } else
+ ret = del_mtab(NULL, spec);
+
return(ret);
}
projects / nfs-utils.git / blobdiff