X-Git-Url: https://git.decadent.org.uk/gitweb/?p=nfs-utils.git;a=blobdiff_plain;f=utils%2Fmount%2Fnfsumount.c;h=1b3c8d105daba1e05bca2c592b4825f9930a72d1;hp=eb3d1fb5ae714da80ec01c026d085f3672fbb067;hb=01a13cd0f4acb7375c16a10965d2cff765d9647a;hpb=a64b65aac7af65f96a24cd89fc07a31dbb5980ab

diff --git a/utils/mount/nfsumount.c b/utils/mount/nfsumount.c
index eb3d1fb..1b3c8d1 100644
--- a/utils/mount/nfsumount.c
+++ b/utils/mount/nfsumount.c
@@ -17,12 +17,14 @@
  *
  */
 
+#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"
@@ -32,6 +34,8 @@
 #include "mount_constants.h"
 #include "mount.h"
 #include "nfsumount.h"
+#include "error.h"
+#include "network.h"
 
 #if !defined(MNT_FORCE)
 /* dare not try to include <linux/mount.h> -- lots of errors */
@@ -43,17 +47,12 @@
 #endif
 
 extern char *progname;
-extern int nfs_mount_version;
 extern int nomtab;
 extern int verbose;
 int force;
 int lazy;
 int remount;
 
-extern int find_kernel_nfs_mount_version(void);
-extern int probe_mntport(clnt_addr_t *);
-extern int nfs_gethostbyname(const char *, struct sockaddr_in *);
-
 static inline enum clnt_stat
 nfs_umount(dirpath *argp, CLIENT *clnt)
 {
@@ -91,30 +90,6 @@ int nfs_call_umount(clnt_addr_t *mnt_server, dirpath *argp)
 	return res;
 }
 
-/* complain about a failed umount */
-static void complain(int err, const char *dev) {
-  switch (err) {
-    case ENXIO:
-      nfs_error (_("umount: %s: invalid block device"), dev); break;
-    case EINVAL:
-      nfs_error (_("umount: %s: not mounted"), dev); break;
-    case EIO:
-      nfs_error (_("umount: %s: can't write superblock"), dev); break;
-    case EBUSY:
-     /* Let us hope fstab has a line "proc /proc ..."
-        and not "none /proc ..."*/
-      nfs_error (_("umount: %s: device is busy"), dev); break;
-    case ENOENT:
-      nfs_error (_("umount: %s: not found"), dev); break;
-    case EPERM:
-      nfs_error (_("umount: %s: must be superuser to umount"), dev); break;
-    case EACCES:
-      nfs_error (_("umount: %s: block devices not permitted on fs"), dev); break;
-    default:
-      nfs_error (_("umount: %s: %s"), dev, strerror (err)); break;
-  }
-}
-
 int del_mtab(const char *spec, const char *node)
 {
 	int umnt_err, res;
@@ -181,14 +156,14 @@ int del_mtab(const char *spec, const char *node)
                 return 0;
 
         if (umnt_err)
-                complain(umnt_err, node);
-        return 1;
+                umount_error(umnt_err, node);
+        return EX_FILEIO;
 }
 
 /*
  * 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;
@@ -197,7 +172,6 @@ int _nfsumount(const char *spec, const char *opts)
 	struct pmap *pmap = &mnt_server.pmap;
 	char *p;
 
-	nfs_mount_version = find_kernel_nfs_mount_version();
 	if (spec == NULL || (p = strchr(spec,':')) == NULL)
 		goto out_bad;
 	hostname = xstrndup(spec, p-spec);
@@ -250,7 +224,7 @@ int _nfsumount(const char *spec, const char *opts)
 		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;
 }
 
@@ -286,6 +260,7 @@ int nfsumount(int argc, char *argv[])
 	argv += 1;
 	argc -= 1;
 
+	argv[0] = argv[-1]; /* So that getopt error messages are correct */
 	while ((c = getopt_long (argc, argv, "fvnrlh",
 				umount_longopts, NULL)) != -1) {
 
@@ -311,6 +286,10 @@ int nfsumount(int argc, char *argv[])
 			return 0;
 		}
 	}
+	if (optind != argc) {
+		umount_usage();
+		return 0;
+	}
 	
 	if (spec == NULL || (*spec != '/' && strchr(spec,':') == NULL)) {
 		printf(_("umount: %s: not found\n"), spec);
@@ -324,18 +303,58 @@ int nfsumount(int argc, char *argv[])
 	if (!mc && verbose)
 		printf(_("Could not find %s in mtab\n"), spec);
 
+	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);
+		return EX_USAGE;
+	}
+
+	if (getuid() != 0) {
+		/* only permitted if "user=" or "users" is in mount options */
+		if (!mc) {
+			/* umount might call us twice.  The second time there will
+			 * be no entry in mtab and we should just exit quietly
+			 */
+			return 0;
+
+		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[4] != '=')
+				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);
+			_nfsumount(mc->m.mnt_fsname, mc->m.mnt_opts);
+		ret = del_mtab(mc->m.mnt_fsname, mc->m.mnt_dir);
 	} else if (*spec != '/') {
 		if (!lazy)
-			ret = _nfsumount(spec, "tcp,v3");
+			_nfsumount(spec, "tcp,v3");
 	} else
 		ret = del_mtab(NULL, spec);
 
-	return(ret);
+	return ret;
 }