X-Git-Url: https://git.decadent.org.uk/gitweb/?p=nfs-utils.git;a=blobdiff_plain;f=utils%2Fmount%2Fnfsumount.c;h=3d387c11e8c3a01b32fbab9004dcbe20f94c9b7a;hp=4208ade291d1c63898f5b374df568f10c4ac9243;hb=5e30f39229acd1cb9e5e6fa73c6adb34401866d3;hpb=d80e49e559da01cd0b4cb23eb9e2351aca7e2ec5 diff --git a/utils/mount/nfsumount.c b/utils/mount/nfsumount.c index 4208ade..3d387c1 100644 --- a/utils/mount/nfsumount.c +++ b/utils/mount/nfsumount.c @@ -17,12 +17,14 @@ * */ +#include #include #include #include #include #include #include +#include #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 -- 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; @@ -147,10 +122,9 @@ int del_mtab(const char *spec, const char *node) 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); + 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"); @@ -159,9 +133,8 @@ int del_mtab(const char *spec, const char *node) return 0; } else if (errno != EBUSY) { /* hmm ... */ perror("remount"); - fprintf(stderr, - _("umount: could not remount %s read-only\n"), - spec); + nfs_error(_("%s: could not remount %s read-only"), + progname, spec); } } @@ -181,14 +154,14 @@ 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 +170,6 @@ 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); @@ -228,7 +200,6 @@ int _nfsumount(const char *spec, const char *opts) 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))) @@ -250,7 +221,7 @@ 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); + nfs_error(_("%s: %s: not found or not mounted"), progname, spec); return 0; } @@ -264,7 +235,7 @@ 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"); @@ -281,11 +252,17 @@ 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) { @@ -308,13 +285,17 @@ int nfsumount(int argc, char *argv[]) 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 == '/') @@ -324,18 +305,57 @@ 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) { + nfs_error(_("%s: %s on %s it 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 0; + + 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 = 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; } -