*
*/
+#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"
#include "nls.h"
-#include "conn.h"
#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 */
#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)
+static int try_remount(const char *spec, const char *node)
{
- return clnt_call(clnt, MOUNTPROC_UMNT,
- (xdrproc_t) xdr_dirpath, (caddr_t)argp,
- (xdrproc_t) xdr_void, NULL,
- TIMEOUT);
-}
-
-int nfs_call_umount(clnt_addr_t *mnt_server, dirpath *argp)
-{
- CLIENT *clnt;
- enum clnt_stat res = 0;
- int msock;
-
- switch (mnt_server->pmap.pm_vers) {
- case 3:
- case 2:
- case 1:
- if (!probe_mntport(mnt_server))
- goto out_bad;
- clnt = mnt_openclnt(mnt_server, &msock);
- if (!clnt)
- goto out_bad;
- res = nfs_umount(argp, clnt);
- mnt_closeclnt(clnt, msock);
- if (res == RPC_SUCCESS)
- return 1;
- break;
- default:
- res = 1;
- break;
+ int res;
+
+ res = mount(spec, node, NULL,
+ MS_MGC_VAL | MS_REMOUNT | MS_RDONLY, NULL);
+ if (res == 0) {
+ struct mntent remnt;
+ nfs_error(_("%s: %s busy - remounted read-only"),
+ progname, spec);
+ remnt.mnt_type = remnt.mnt_fsname = NULL;
+ remnt.mnt_dir = xstrdup(node);
+ remnt.mnt_opts = xstrdup("ro");
+ if (!nomtab)
+ update_mtab(node, &remnt);
+ } else if (errno != EBUSY) { /* hmm ... */
+ perror(_("remount"));
+ nfs_error(_("%s: could not remount %s read-only"),
+ progname, spec);
}
- out_bad:
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)
+static int del_mtab(const char *spec, const char *node)
{
int umnt_err, res;
- umnt_err = 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 && 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;
- 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 ? spec : node);
- }
+ umnt_err = 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 && remount && errno == EBUSY && spec) {
+ res = try_remount(spec, node);
+ if (!res)
+ return 0;
+ }
+
+ if (res >= 0) {
+ /* Umount succeeded */
+ if (verbose)
+ printf(_("%s umounted\n"), spec ? spec : node);
+ }
writemtab:
- if (!nomtab &&
- (umnt_err == 0 || umnt_err == EINVAL || umnt_err == ENOENT)) {
- update_mtab(node, NULL);
- }
+ if (!nomtab &&
+ (umnt_err == 0 || umnt_err == EINVAL || umnt_err == ENOENT)) {
+ update_mtab(node, NULL);
+ }
- if (res >= 0)
- return 0;
+ if (res >= 0)
+ return 0;
- if (umnt_err)
- complain(umnt_err, node);
- return 1;
+ if (umnt_err)
+ umount_error(umnt_err, node);
+ return EX_FILEIO;
}
/*
- * Returns 1 if everything went well, else 0.
+ * Pick up certain mount options used during the original mount
+ * from /etc/mtab. The basics include the server's IP address and
+ * the server pathname of the share to unregister.
+ *
+ * These options might also describe the mount port, mount protocol
+ * version, and transport protocol used to punch through a firewall.
+ * We will need this information to get through the firewall again
+ * to do the umount.
*/
-int _nfsumount(const char *spec, const char *opts)
+static int do_nfs_umount(const char *spec, char *opts)
{
char *hostname;
char *dirname;
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);
- dirname = xstrdup(p+1);
+ if (spec == NULL) {
+ nfs_error(_("%s: No NFS export name was provided"),
+ progname);
+ return EX_USAGE;
+ }
+
+ p = strchr(spec, ':');
+ if (p == NULL) {
+ nfs_error(_("%s: '%s' is not a legal NFS export name"),
+ progname, spec);
+ return EX_USAGE;
+ }
+ hostname = xstrndup(spec, p - spec);
+ dirname = xstrdup(p + 1);
#ifdef NFS_MOUNT_DEBUG
printf(_("host: %s, directory: %s\n"), hostname, dirname);
#endif
pmap->pm_prog = MOUNTPROG;
pmap->pm_vers = MOUNTVERS_NFSV3;
- pmap->pm_prot = IPPROTO_TCP;
if (opts && (p = strstr(opts, "mountprog=")) && isdigit(*(p+10)))
pmap->pm_prog = atoi(p+10);
if (opts && (p = strstr(opts, "mountport=")) && isdigit(*(p+10)))
pmap->pm_vers = atoi(p+10);
if (opts && (hasmntopt(&mnt, "udp") || hasmntopt(&mnt, "proto=udp")))
pmap->pm_prot = IPPROTO_UDP;
+ if (opts && (hasmntopt(&mnt, "tcp") || hasmntopt(&mnt, "proto=tcp")))
+ pmap->pm_prot = IPPROTO_TCP;
- if (!nfs_gethostbyname(hostname, &mnt_server.saddr))
- goto out_bad;
- return nfs_call_umount(&mnt_server, &dirname);
- out_bad:
- printf("%s: %s: not found or not mounted\n", progname, spec);
- return 0;
+ if (!nfs_gethostbyname(hostname, &mnt_server.saddr)) {
+ nfs_error(_("%s: '%s' does not contain a recognized hostname"),
+ progname, spec);
+ return EX_USAGE;
+ }
+
+ if (!nfs_call_umount(&mnt_server, &dirname)) {
+ nfs_error(_("%s: Server failed to unmount '%s'"),
+ progname, spec);
+ return EX_USAGE;
+ }
+
+ return EX_SUCCESS;
}
static struct option umount_longopts[] =
{ NULL, 0, 0, 0 }
};
-void umount_usage()
+static void umount_usage(void)
{
- printf("usage: %s dir [-fvnrlh]\n", progname);
- printf("options:\n\t-f\t\tforce unmount\n");
- printf("\t-v\t\tverbose\n");
- printf("\t-n\t\tDo not update /etc/mtab\n");
- printf("\t-r\t\tremount\n");
- printf("\t-l\t\tlazy unmount\n");
- printf("\t-h\t\tprint this help\n\n");
+ printf(_("usage: %s dir [-fvnrlh]\n"), progname);
+ printf(_("options:\n\t-f\t\tforce unmount\n"));
+ printf(_("\t-v\tverbose\n"));
+ printf(_("\t-n\tDo not update /etc/mtab\n"));
+ printf(_("\t-r\tremount\n"));
+ printf(_("\t-l\tlazy unmount\n"));
+ printf(_("\t-h\tprint this help\n\n"));
}
int nfsumount(int argc, char *argv[])
char *spec;
struct mntentchn *mc;
+ if (argc < 2) {
+ umount_usage();
+ return EX_USAGE;
+ }
+
spec = argv[1];
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) {
case 'h':
default:
umount_usage();
- return 0;
+ return EX_USAGE;
}
}
+ if (optind != argc) {
+ umount_usage();
+ return EX_USAGE;
+ }
if (spec == NULL || (*spec != '/' && strchr(spec,':') == NULL)) {
- printf(_("umount: %s: not found\n"), spec);
- return 0;
+ nfs_error(_("%s: %s: not found\n"), progname, spec);
+ return EX_USAGE;
}
if (*spec == '/')
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) {
+ nfs_error(_("%s: %s on %s is not an NFS filesystem"),
+ progname, 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 EX_SUCCESS;
+
+ only_root:
+ nfs_error(_("%s: You are not permitted to unmount %s"),
+ progname, spec);
+ return EX_USAGE;
+ }
+ 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 = do_nfs_umount(mc->m.mnt_fsname, mc->m.mnt_opts);
+ if (!ret || force)
ret = del_mtab(mc->m.mnt_fsname, mc->m.mnt_dir);
} else if (*spec != '/') {
if (!lazy)
- ret = _nfsumount(spec, "tcp,v3");
+ ret = do_nfs_umount(spec, "tcp,v3");
} else
ret = del_mtab(NULL, spec);
- return(ret);
+ return ret;
}
-
projects / nfs-utils.git / blobdiff