#include <mntent.h>
#include <sys/mount.h>
#include <ctype.h>
+#include <pwd.h>
#include "xcommon.h"
#include "fstab.h"
}
}
+/*
+ * Look for an option in a comma-separated list
+ */
+static int
+contains(const char *list, const char *s) {
+ int n = strlen(s);
+
+ while (*list) {
+ if (strncmp(list, s, n) == 0 &&
+ (list[n] == 0 || list[n] == ','))
+ return 1;
+ while (*list && *list++ != ',') ;
+ }
+ return 0;
+}
+
+/*
+ * If list contains "user=peter" and we ask for "user=", return "peter"
+ */
+static char *
+get_value(const char *list, const char *s) {
+ const char *t;
+ int n = strlen(s);
+
+ while (*list) {
+ if (strncmp(list, s, n) == 0) {
+ s = t = list+n;
+ while (*s && *s != ',')
+ s++;
+ return xstrndup(t, s-t);
+ }
+ while (*list && *list++ != ',') ;
+ }
+ return 0;
+}
+
int add_mtab2(const char *spec, const char *node, const char *type,
const char *opts, struct mntentchn *mc)
{
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;
}
printf(_("Could not find %s in mtab\n"), spec);
if(mc) {
+ if(contains(mc->m.mnt_opts, "user") && getuid() != 0) {
+ struct passwd *pw = getpwuid(getuid());
+ if(!pw || strcmp(pw->pw_name, get_value(mc->m.mnt_opts, "user="))) {
+ fprintf(stderr, "%s: permission denied to unmount %s\n",
+ progname, spec);
+ exit(1);
+ }
+ } else {
+ if(!contains(mc->m.mnt_opts, "users") && getuid() != 0) {
+ fprintf(stderr, "%s: only root can unmount %s from %s\n",
+ progname, mc->m.mnt_fsname, mc->m.mnt_dir);
+ exit(1);
+ }
+ }
+
ret = _nfsumount(mc->m.mnt_fsname, mc->m.mnt_opts);
if(ret)
ret = add_mtab2(mc->m.mnt_fsname, mc->m.mnt_dir,