#include <errno.h>
#include <fcntl.h>
#include <sys/mount.h>
+#include <sys/utsname.h>
#include <getopt.h>
#include <mntent.h>
+#include <pwd.h>
#include "fstab.h"
#include "xcommon.h"
+#include "nls.h"
#include "mount_constants.h"
#include "nfs_paths.h"
+#include "nfs_mntent.h"
#include "nfs_mount.h"
#include "nfs4_mount.h"
-#include "nfsumount.h"
#include "mount.h"
+#include "error.h"
+#include "network.h"
+#include "stropts.h"
char *progname;
+int nfs_mount_data_version;
int nomtab;
int verbose;
-int mounttype;
+int sloppy;
+int string;
+
+#define FOREGROUND (0)
+#define BACKGROUND (1)
static struct option longopts[] = {
{ "fake", 0, 0, 'f' },
{ "read-write", 0, 0, 'w' },
{ "rw", 0, 0, 'w' },
{ "options", 1, 0, 'o' },
- { "nfsvers", 1, 0, 't' },
- { "bind", 0, 0, 128 },
- { "replace", 0, 0, 129 },
- { "after", 0, 0, 130 },
- { "before", 0, 0, 131 },
- { "over", 0, 0, 132 },
- { "move", 0, 0, 133 },
- { "rbind", 0, 0, 135 },
{ NULL, 0, 0, 0 }
};
-/* Map from -o and fstab option strings to the flag argument to mount(2). */
+/*
+ * Map from -o and fstab option strings to the flag argument to mount(2).
+ */
struct opt_map {
- const char *opt; /* option name */
- int skip; /* skip in mtab option string */
- int inv; /* true if flag value should be inverted */
- int mask; /* flag mask value */
+ const char *opt; /* option name */
+ int skip; /* skip in mtab option string */
+ int inv; /* true if flag value should be inverted */
+ int mask; /* flag mask value */
};
static const struct opt_map opt_map[] = {
{ "remount", 0, 0, MS_REMOUNT}, /* Alter flags of mounted FS */
{ "bind", 0, 0, MS_BIND }, /* Remount part of tree elsewhere */
{ "rbind", 0, 0, MS_BIND|MS_REC }, /* Idem, plus mounted subtrees */
+ { "auto", 0, 0, MS_DUMMY }, /* Can be mounted using -a */
+ { "noauto", 0, 0, MS_DUMMY }, /* Can only be mounted explicitly */
+ { "users", 1, 0, MS_USERS }, /* Allow ordinary user to mount */
+ { "nousers", 0, 1, MS_DUMMY }, /* Forbid ordinary user to mount */
+ { "user", 1, 0, MS_USER }, /* Allow ordinary user to mount */
+ { "nouser", 0, 1, MS_DUMMY }, /* Forbid ordinary user to mount */
+ { "owner", 0, 0, MS_DUMMY }, /* Let the owner of the device mount */
+ { "noowner", 0, 0, MS_DUMMY }, /* Device owner has no special privs */
+ { "group", 0, 0, MS_DUMMY }, /* Let the group of the device mount */
+ { "nogroup", 0, 0, MS_DUMMY }, /* Device group has no special privs */
+ { "_netdev", 0, 0, MS_DUMMY}, /* Device requires network */
+ { "comment", 0, 0, MS_DUMMY}, /* fstab comment only (kudzu,_netdev)*/
/* add new options here */
#ifdef MS_NOSUB
{ "mand", 0, 0, MS_MANDLOCK }, /* Allow mandatory locks on this FS */
{ "nomand", 0, 1, MS_MANDLOCK }, /* Forbid mandatory locks on this FS */
#endif
+ { "loop", 1, 0, MS_DUMMY }, /* use a loop device */
#ifdef MS_NOATIME
{ "atime", 0, 1, MS_NOATIME }, /* Update access time */
{ "noatime", 0, 0, MS_NOATIME }, /* Do not update access time */
#ifdef MS_NODIRATIME
{ "diratime", 0, 1, MS_NODIRATIME }, /* Update dir access times */
{ "nodiratime", 0, 0, MS_NODIRATIME },/* Do not update dir access times */
+#endif
+#ifdef MS_RELATIME
+ { "relatime", 0, 0, MS_RELATIME }, /* Update access times relative to
+ mtime/ctime */
+ { "norelatime", 0, 1, MS_RELATIME }, /* Update access time without regard
+ to mtime/ctime */
#endif
{ NULL, 0, 0, 0 }
};
-/* Try to build a canonical options string. */
-static char * fix_opts_string (int flags, const char *extra_opts) {
+#define MAKE_VERSION(p,q,r) (65536 * (p) + 256 * (q) + (r))
+
+int linux_version_code(void)
+{
+ struct utsname my_utsname;
+ int p, q, r;
+
+ if (uname(&my_utsname) == 0) {
+ p = atoi(strtok(my_utsname.release, "."));
+ q = atoi(strtok(NULL, "."));
+ r = atoi(strtok(NULL, "."));
+ return MAKE_VERSION(p,q,r);
+ }
+ return 0;
+}
+
+/*
+ * Choose the version of the nfs_mount_data structure that is appropriate
+ * for the kernel that is doing the mount.
+ *
+ * NFS_MOUNT_VERSION: maximum version supported by these sources
+ * nfs_mount_data_version: maximum version supported by the running kernel
+ */
+static void discover_nfs_mount_data_version(void)
+{
+ int kernel_version = linux_version_code();
+
+ if (kernel_version) {
+ if (kernel_version < MAKE_VERSION(2, 1, 32))
+ nfs_mount_data_version = 1;
+ else if (kernel_version < MAKE_VERSION(2, 2, 18))
+ nfs_mount_data_version = 3;
+ else if (kernel_version < MAKE_VERSION(2, 3, 0))
+ nfs_mount_data_version = 4;
+ else if (kernel_version < MAKE_VERSION(2, 3, 99))
+ nfs_mount_data_version = 3;
+ else if (kernel_version < MAKE_VERSION(2, 6, 3))
+ nfs_mount_data_version = 4;
+ else
+ nfs_mount_data_version = 6;
+ }
+ if (nfs_mount_data_version > NFS_MOUNT_VERSION)
+ nfs_mount_data_version = NFS_MOUNT_VERSION;
+ else
+ if (kernel_version > MAKE_VERSION(2, 6, 22))
+ string++;
+}
+
+static void print_one(char *spec, char *node, char *type, char *opts)
+{
+ if (!verbose)
+ return;
+
+ if (opts)
+ printf(_("%s on %s type %s (%s)\n"), spec, node, type, opts);
+ else
+ printf(_("%s on %s type %s\n"), spec, node, type);
+}
+
+/*
+ * Build a canonical mount option string for /etc/mtab.
+ */
+static char *fix_opts_string(int flags, const char *extra_opts)
+{
const struct opt_map *om;
char *new_opts;
new_opts = xstrdup((flags & MS_RDONLY) ? "ro" : "rw");
+ if (flags & MS_USER) {
+ /* record who mounted this so they can unmount */
+ struct passwd *pw = getpwuid(getuid());
+ if(pw)
+ new_opts = xstrconcat3(new_opts, ",user=", pw->pw_name);
+ }
+ if (flags & MS_USERS)
+ new_opts = xstrconcat3(new_opts, ",users", "");
+
for (om = opt_map; om->opt != NULL; om++) {
if (om->skip)
continue;
return new_opts;
}
-
-int add_mtab(char *fsname, char *mount_point, char *fstype, int flags, char *opts, int freq, int passno)
+static int add_mtab(char *spec, char *mount_point, char *fstype,
+ int flags, char *opts, int freq, int pass)
{
struct mntent ment;
- int fd;
- FILE *mtab;
+ mntFILE *mtab;
+ int result = EX_FILEIO;
- ment.mnt_fsname = fsname;
+ ment.mnt_fsname = spec;
ment.mnt_dir = mount_point;
ment.mnt_type = fstype;
ment.mnt_opts = fix_opts_string(flags, opts);
- ment.mnt_freq = 0;
- ment.mnt_passno= 0;
+ ment.mnt_freq = freq;
+ ment.mnt_passno = pass;
- if ((fd = open(MOUNTED"~", O_RDWR|O_CREAT|O_EXCL, 0600)) == -1) {
- fprintf(stderr, "Can't get "MOUNTED"~ lock file");
- return 1;
+ if (flags & MS_REMOUNT) {
+ update_mtab(ment.mnt_dir, &ment);
+ free(ment.mnt_opts);
+ return EX_SUCCESS;
}
- close(fd);
- if ((mtab = setmntent(MOUNTED, "a+")) == NULL) {
- fprintf(stderr, "Can't open " MOUNTED);
- return 1;
+ lock_mtab();
+
+ mtab = nfs_setmntent(MOUNTED, "a+");
+ if (mtab == NULL || mtab->mntent_fp == NULL) {
+ nfs_error(_("Can't open mtab: %s"),
+ strerror(errno));
+ goto fail_unlock;
}
- if (addmntent(mtab, &ment) == 1) {
- fprintf(stderr, "Can't write mount entry");
- return 1;
+ if (nfs_addmntent(mtab, &ment) == 1) {
+ nfs_error(_("Can't write mount entry to mtab: %s"),
+ strerror(errno));
+ goto fail_close;
}
- if (fchmod(fileno(mtab), 0644) == -1) {
- fprintf(stderr, "Can't set perms on " MOUNTED);
- return 1;
+ if (fchmod(fileno(mtab->mntent_fp), 0644) == -1) {
+ nfs_error(_("Can't set permissions on mtab: %s"),
+ strerror(errno));
+ goto fail_close;
}
- endmntent(mtab);
+ result = EX_SUCCESS;
- if (unlink(MOUNTED"~") == -1) {
- fprintf(stderr, "Can't remove "MOUNTED"~");
- return 1;
- }
+fail_close:
+ nfs_endmntent(mtab);
+fail_unlock:
+ unlock_mtab();
+ free(ment.mnt_opts);
- return 0;
+ return result;
}
-int do_mount_syscall(char *spec, char *node, char *type, int flags, void *data)
+void mount_usage(void)
{
- return mount(spec, node, type, flags, data);
+ printf(_("usage: %s remotetarget dir [-rvVwfnsih] [-o nfsoptions]\n"),
+ progname);
+ printf(_("options:\n"));
+ printf(_("\t-r\t\tMount file system readonly\n"));
+ printf(_("\t-v\t\tVerbose\n"));
+ printf(_("\t-V\t\tPrint version\n"));
+ printf(_("\t-w\t\tMount file system read-write\n"));
+ printf(_("\t-f\t\tFake mount, do not actually mount\n"));
+ printf(_("\t-n\t\tDo not update /etc/mtab\n"));
+ printf(_("\t-s\t\tTolerate sloppy mount options rather than fail\n"));
+ printf(_("\t-h\t\tPrint this help\n"));
+ printf(_("\tnfsoptions\tRefer to mount.nfs(8) or nfs(5)\n\n"));
}
-void mount_usage()
+static void parse_opt(const char *opt, int *mask, char *extra_opts, int len)
{
- printf("usage: %s remotetarget dir [-rvVwfnh] [-t version] [-o nfsoptions]\n", progname);
- printf("options:\n\t-r\t\tMount file system readonly\n");
- printf("\t-v\t\tVerbose\n");
- printf("\t-V\t\tPrint version\n");
- printf("\t-w\t\tMount file system read-write\n");
- printf("\t-f\t\tFake mount, don't actually mount\n");
- printf("\t-n\t\tDo not update /etc/mtab\n");
- printf("\t-h\t\tPrint this help\n");
- printf("\tversion\t\tnfs4 - NFS version 4, nfs - older NFS version supported\n");
- printf("\tnfsoptions\tRefer mount.nfs(8) or nfs(5)\n\n");
-}
-
-static inline void
-parse_opt(const char *opt, int *mask, char *extra_opts, int len) {
const struct opt_map *om;
for (om = opt_map; om->opt != NULL; om++) {
strcat(extra_opts, opt);
}
-/* Take -o options list and compute 4th and 5th args to mount(2). flags
- gets the standard options (indicated by bits) and extra_opts all the rest */
-static void parse_opts (const char *options, int *flags, char **extra_opts)
+/*
+ * Convert the provided mount command-line options into the 4th &
+ * 5th arguments to mount(2). Output parameter "@flags" gets the
+ * standard options (indicated by MS_ bits), and output parameter
+ * "@extra_opts" gets all the filesystem-specific options.
+ */
+static void parse_opts(const char *options, int *flags, char **extra_opts)
{
if (options != NULL) {
char *opts = xstrdup(options);
- char *opt;
- int len = strlen(opts) + 20;
+ char *opt, *p;
+ int len = strlen(opts) + 1; /* include room for a null */
+ int open_quote = 0;
*extra_opts = xmalloc(len);
**extra_opts = '\0';
- for (opt = strtok(opts, ","); opt; opt = strtok(NULL, ","))
- parse_opt(opt, flags, *extra_opts, len);
-
+ for (p = opts, opt = NULL; p && *p; p++) {
+ if (!opt)
+ opt = p; /* begin of the option item */
+ if (*p == '"')
+ open_quote ^= 1; /* reverse the status */
+ if (open_quote)
+ continue; /* still in a quoted block */
+ if (*p == ',')
+ *p = '\0'; /* terminate the option item */
+
+ /* end of option item or last item */
+ if (*p == '\0' || *(p + 1) == '\0') {
+ parse_opt(opt, flags, *extra_opts, len);
+ opt = NULL;
+ }
+ }
free(opts);
}
+}
+
+static int chk_mountpoint(char *mount_point)
+{
+ struct stat sb;
+
+ if (stat(mount_point, &sb) < 0){
+ mount_error(NULL, mount_point, errno);
+ return 1;
+ }
+ if (S_ISDIR(sb.st_mode) == 0){
+ mount_error(NULL, mount_point, ENOTDIR);
+ return 1;
+ }
+ if (access(mount_point, X_OK) < 0) {
+ mount_error(NULL, mount_point, errno);
+ return 1;
+ }
+ return 0;
}
-static void mount_error(char *node)
+static int try_mount(char *spec, char *mount_point, int flags,
+ char *fs_type, char **extra_opts, char *mount_opts,
+ int fake, int nomtab, int bg)
{
- switch(errno) {
- case ENOTDIR:
- printf("%s: mount point %s is not a directory\n", progname, node);
- break;
- case EBUSY:
- printf("%s: %s is already mounted or busy\n", progname, node);
- break;
- case ENOENT:
- printf("%s: mount point %s does not exist\n", progname, node);
- break;
- default:
- printf("%s: %s\n", progname, strerror(errno));
+ int ret;
+
+ if (string)
+ ret = nfsmount_string(spec, mount_point, fs_type, flags,
+ extra_opts, fake, bg);
+ else {
+ if (strcmp(fs_type, "nfs4") == 0)
+ ret = nfs4mount(spec, mount_point, flags,
+ extra_opts, fake, bg);
+ else
+ ret = nfsmount(spec, mount_point, flags,
+ extra_opts, fake, bg);
}
+
+ if (ret)
+ return ret;
+
+ if (!fake)
+ print_one(spec, mount_point, fs_type, mount_opts);
+
+ if (!nomtab)
+ ret = add_mtab(spec, mount_point, fs_type, flags, *extra_opts,
+ 0, 0 /* these are always zero for NFS */ );
+ return ret;
}
int main(int argc, char *argv[])
{
- int c, flags = 0, nfs_mount_vers = 0, mnt_err = 1, fake = 0;
- char *spec, *mount_point, *extra_opts = NULL;
- char *mount_opts = NULL, *p;
+ int c, flags = 0, mnt_err = 1, fake = 0;
+ char *spec, *mount_point, *fs_type = "nfs";
+ char *extra_opts = NULL, *mount_opts = NULL;
+ uid_t uid = getuid();
- progname = argv[0];
- if ((p = strrchr(progname, '/')) != NULL)
- progname = p+1;
+ progname = basename(argv[0]);
- if (getuid() != 0) {
- printf("%s: only root can do that.\n", progname);
- exit(1);
- }
-
- if(!strncmp(progname, "umount", strlen("umount"))) {
- if(argc < 2) {
- umount_usage();
- exit(1);
- }
- return(nfsumount(argc, argv));
- }
+ discover_nfs_mount_data_version();
- if ((argc < 2)) {
- mount_usage();
- exit(1);
- }
+ if(!strncmp(progname, "umount", strlen("umount")))
+ exit(nfsumount(argc, argv));
- if(argv[1][0] == '-') {
+ if (argv[1] && argv[1][0] == '-') {
if(argv[1][1] == 'V')
printf("%s ("PACKAGE_STRING")\n", progname);
else
mount_usage();
- return 0;
+ exit(EX_SUCCESS);
}
- while ((c = getopt_long (argc - 2, argv + 2, "rt:vVwfno:h",
+ if ((argc < 3)) {
+ mount_usage();
+ exit(EX_USAGE);
+ }
+
+ spec = argv[1];
+ mount_point = argv[2];
+
+ argv[2] = argv[0]; /* so that getopt error messages are correct */
+ while ((c = getopt_long(argc - 2, argv + 2, "rvVwfno:hs",
longopts, NULL)) != -1) {
switch (c) {
case 'r':
flags |= MS_RDONLY;
break;
- case 't':
- nfs_mount_vers = (strncmp(optarg, "nfs4", 4)) ? 0 : 4;
- break;
case 'v':
++verbose;
break;
case 'V':
printf("%s: ("PACKAGE_STRING")\n", progname);
- return 0;
+ exit(EX_SUCCESS);
case 'w':
flags &= ~MS_RDONLY;
break;
else
mount_opts = xstrdup(optarg);
break;
- case 128: /* bind */
- mounttype = MS_BIND;
- break;
- case 129: /* replace */
- mounttype = MS_REPLACE;
- break;
- case 130: /* after */
- mounttype = MS_AFTER;
- break;
- case 131: /* before */
- mounttype = MS_BEFORE;
- break;
- case 132: /* over */
- mounttype = MS_OVER;
- break;
- case 133: /* move */
- mounttype = MS_MOVE;
- break;
- case 135: /* rbind */
- mounttype = MS_BIND | MS_REC;
+ case 's':
+ ++sloppy;
break;
case 'h':
default:
mount_usage();
- exit(1);
+ goto out_usage;
}
}
- spec = argv[1];
- mount_point = canonicalize(argv[2]);
-
- parse_opts(mount_opts, &flags, &extra_opts);
+ /*
+ * Extra non-option words at the end are bogus...
+ */
+ if (optind != argc - 2) {
+ mount_usage();
+ goto out_usage;
+ }
+
+ if (strcmp(progname, "mount.nfs4") == 0)
+ fs_type = "nfs4";
+
+ /*
+ * If a non-root user is attempting to mount, make sure the
+ * user's requested options match the options specified in
+ * /etc/fstab; otherwise, don't allow the mount.
+ */
+ if (uid != 0) {
+ struct mntentchn *mc;
+
+ if ((mc = getfsfile(mount_point)) == NULL ||
+ strcmp(mc->m.mnt_fsname, spec) != 0 ||
+ strcmp(mc->m.mnt_type, fs_type) != 0) {
+ nfs_error(_("%s: permission denied: no match for %s "
+ "found in /etc/fstab"), progname, mount_point);
+ goto out_usage;
+ }
- if (!strcmp(progname, "mount.nfs4") || nfs_mount_vers == 4) {
- nfs_mount_vers = 4;
- mnt_err = nfs4mount(spec, mount_point, &flags, &extra_opts, &mount_opts, 0);
+ /*
+ * 'mount' munges the options from fstab before passing them
+ * to us, so it is non-trivial to test that we have the correct
+ * set of options and we don't want to trust what the user
+ * gave us, so just take whatever is in /etc/fstab.
+ */
+ mount_opts = strdup(mc->m.mnt_opts);
}
- else {
- if (!strcmp(progname, "mount.nfs")) {
- mnt_err = nfsmount(spec, mount_point, &flags,
- &extra_opts, &mount_opts, &nfs_mount_vers, 0);
+
+ mount_point = canonicalize(mount_point);
+ if (!mount_point) {
+ nfs_error(_("%s: no mount point provided"), progname);
+ goto out_usage;
+ }
+ if (mount_point[0] != '/') {
+ nfs_error(_("%s: unrecognized mount point %s"),
+ progname, mount_point);
+ mnt_err = EX_USAGE;
+ goto out;
+ }
+
+ parse_opts(mount_opts, &flags, &extra_opts);
+
+ if (uid != 0) {
+ if (!(flags & (MS_USERS|MS_USER))) {
+ nfs_error(_("%s: permission denied"), progname);
+ mnt_err = EX_USAGE;
+ goto out;
}
}
- if (!mnt_err && !fake) {
- mnt_err = do_mount_syscall(spec, mount_point, nfs_mount_vers == 4 ? "nfs4" : "nfs", flags, mount_opts);
-
- if(mnt_err) {
- mount_error(mount_point);
- exit(-1);
+ if (chk_mountpoint(mount_point)) {
+ mnt_err = EX_USAGE;
+ goto out;
+ }
+
+ mnt_err = try_mount(spec, mount_point, flags, fs_type, &extra_opts,
+ mount_opts, fake, nomtab, FOREGROUND);
+ if (mnt_err == EX_BG) {
+ printf(_("%s: backgrounding \"%s\"\n"),
+ progname, spec);
+ fflush(stdout);
+
+ /*
+ * Parent exits immediately with success.
+ */
+ if (daemon(0, 0)) {
+ nfs_error(_("%s: failed to start "
+ "background process: %s\n"),
+ progname, strerror(errno));
+ exit(EX_FAIL);
}
- if(!nomtab)
- add_mtab(spec, mount_point, nfs_mount_vers == 4 ? "nfs4" : "nfs",
- flags, extra_opts, 0, 0);
+ mnt_err = try_mount(spec, mount_point, flags, fs_type,
+ &extra_opts, mount_opts, fake,
+ nomtab, BACKGROUND);
+ if (verbose && mnt_err)
+ printf(_("%s: giving up \"%s\"\n"),
+ progname, spec);
}
- return 0;
-}
+out:
+ free(mount_opts);
+ free(extra_opts);
+ free(mount_point);
+ exit(mnt_err);
+out_usage:
+ free(mount_opts);
+ exit(EX_USAGE);
+}
projects / nfs-utils.git / blobdiff