diff options
| -rw-r--r-- | source3/client/umount.cifs.c | 266 |
1 files changed, 266 insertions, 0 deletions
diff --git a/source3/client/umount.cifs.c b/source3/client/umount.cifs.c new file mode 100644 index 0000000000..0210de85a0 --- /dev/null +++ b/source3/client/umount.cifs.c @@ -0,0 +1,266 @@ +/* + Unmount utility program for Linux CIFS VFS (virtual filesystem) client + Copyright (C) 2005 Steve French (sfrench@us.ibm.com) + + This program is free software; you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation; either version 2 of the License, or + (at your option) any later version. + + This program is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program; if not, write to the Free Software + Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ + +#ifndef _GNU_SOURCE +#define _GNU_SOURCE +#endif + +#include <stdlib.h> +#include <stdio.h> +#include <unistd.h> +#include <ctype.h> +#include <sys/types.h> +#include <sys/mount.h> +#include <sys/ioctl.h> +#include <sys/stat.h> +#include <fcntl.h> +#include <getopt.h> +#include <errno.h> +#include <string.h> +#include <mntent.h> + +#define UNMOUNT_CIFS_VERSION_MAJOR "0" +#define UNMOUNT_CIFS_VERSION_MINOR "1" + +#ifndef UNMOUNT_CIFS_VENDOR_SUFFIX +#define UNMOUNT_CIFS_VENDOR_SUFFIX "" +#endif + +#ifndef MNT_DETACH +#define MNT_DETACH 0x02 +#endif + +#ifndef MNT_EXPIRE +#define MNT_EXPIRE 0x04 +#endif + +#define CIFS_IOC_CHECKUMOUNT _IOR('u', 2, int) + +static struct option longopts[] = { + { "all", 0, NULL, 'a' }, + { "help",0, NULL, 'h' }, + { "read-only", 0, NULL, 'r' }, + { "ro", 0, NULL, 'r' }, + { "verbose", 0, NULL, 'v' }, + { "version", 0, NULL, 'V' }, + { "expire", 0, NULL, 'e' }, + { "force", 0, 0, 'f' }, + { "lazy", 0, 0, 'l' }, + { "no-mtab", 0, 0, 'n' }, + { NULL, 0, NULL, 0 } +}; + +char * thisprogram; +int verboseflg = 0; + +static void umount_cifs_usage(void) +{ + printf("\nUsage: %s <remotetarget> <dir>\n", thisprogram); + printf("\nUnmount the specified directory\n"); + printf("\nLess commonly used options:"); + printf("\n\t-r\tIf mount fails, retry with readonly remount."); + printf("\n\t-n\tDo not write to mtab."); + printf("\n\t-f\tAttempt a forced unmount, even if the fs is busy."); + printf("\n\t-l\tAttempt lazy unmount, Unmount now, cleanup later."); + printf("\n\t-v\tEnable verbose mode (may be useful for debugging)."); + printf("\n\t-h\tDisplay this help."); + printf("\n\nOptions are described in more detail in the manual page"); + printf("\n\tman 8 umount.cifs\n"); + printf("\nTo display the version number of the cifs umount utility:"); + printf("\n\t%s -V\n",thisprogram); +} + +static int umount_check_perm(char * dir) +{ + int fileid; + int rc; + + /* presumably can not chdir into the target as we do on mount */ + + fileid = open(dir, O_RDONLY | O_DIRECTORY | O_NOFOLLOW, 0); + + /* check if fileid valid if fileid == -1 BB FIXME */ + + rc = ioctl(fileid, CIFS_IOC_CHECKUMOUNT, NULL); + + if(verboseflg) + printf("ioctl returned %d with errno %d\n",rc,errno); + + close(fileid); + + return rc; +} + +int main(int argc, char ** argv) +{ + int c; + int rc; + int flags = 0; + int nomtab = 0; + int retry_remount = 0; + struct mntent mountent; + char * mountpoint; + FILE * pmntfile; + + if(argc && argv) { + thisprogram = argv[0]; + } else { + umount_cifs_usage(); + return -EINVAL; + } + + if(argc < 2) { + umount_cifs_usage(); + return -EINVAL; + } + + if(thisprogram == NULL) + thisprogram = "umount.cifs"; + + /* add sharename in opts string as unc= parm */ + + while ((c = getopt_long (argc, argv, "afhilnrvV", + longopts, NULL)) != -1) { + switch (c) { +/* No code to do the following option yet */ +/* case 'a': + ++umount_all; + break; */ + case '?': + case 'h': /* help */ + umount_cifs_usage(); + exit(1); + case 'n': + ++nomtab; + break; + case 'f': + flags |= MNT_FORCE; + break; + case 'l': + flags |= MNT_DETACH; /* lazy unmount */ + break; + case 'e': + flags |= MNT_EXPIRE; /* gradually timeout */ + break; + case 'r': + ++retry_remount; + break; + case 'v': + ++verboseflg; + break; + case 'V': + printf ("umount.cifs version: %s.%s%s\n", + UNMOUNT_CIFS_VERSION_MAJOR, + UNMOUNT_CIFS_VERSION_MINOR, + UNMOUNT_CIFS_VENDOR_SUFFIX); + exit (0); + default: + printf("unknown unmount option %c\n",c); + umount_cifs_usage(); + exit(1); + } + } + + /* move past the umount options */ + argv += optind; + argc -= optind; + + mountpoint = argv[0]; + + if((argc < 1) || (argv[0] == NULL)) { + printf("\nMissing name of unmount directory\n"); + umount_cifs_usage(); + return -EINVAL; + } + + if(verboseflg) + printf("optind %d unmount dir %s\n",optind, mountpoint); + + /* check if running effectively root */ + if(geteuid() != 0) + printf("Trying to unmount when %s not installed suid\n",thisprogram); + + /* fixup path if needed */ + + /* check if our uid was the one who mounted */ + rc = umount_check_perm(mountpoint); + if (rc) { + return rc; + } + + if(umount2(mountpoint, flags)) { + /* remember to kill daemon on error */ + + switch (errno) { + case 0: + printf("mount failed but no error number set\n"); + break; + default: + + printf("mount error %d = %s\n",errno,strerror(errno)); + } + printf("Refer to the umount.cifs(8) manual page (e.g.man 8 umount.cifs)\n"); + return -1; + } else { + pmntfile = setmntent(MOUNTED, "a+"); + if(pmntfile) { +/* mountent.mnt_fsname = share_name; + mountent.mnt_dir = mountpoint; + mountent.mnt_type = "cifs"; + mountent.mnt_opts = malloc(220); + if(mountent.mnt_opts) { + char * mount_user = getusername(); + memset(mountent.mnt_opts,0,200); + if(flags & MS_RDONLY) + strcat(mountent.mnt_opts,"ro"); + else + strcat(mountent.mnt_opts,"rw"); + if(flags & MS_MANDLOCK) + strcat(mountent.mnt_opts,",mand"); + else + strcat(mountent.mnt_opts,",nomand"); + if(flags & MS_NOEXEC) + strcat(mountent.mnt_opts,",noexec"); + if(flags & MS_NOSUID) + strcat(mountent.mnt_opts,",nosuid"); + if(flags & MS_NODEV) + strcat(mountent.mnt_opts,",nodev"); + if(flags & MS_SYNCHRONOUS) + strcat(mountent.mnt_opts,",synch"); + if(mount_user) { + if(getuid() != 0) { + strcat(mountent.mnt_opts,",user="); + strcat(mountent.mnt_opts,mount_user); + } + free(mount_user); + } + } + mountent.mnt_freq = 0; + mountent.mnt_passno = 0; + rc = addmntent(pmntfile,&mountent); + endmntent(pmntfile); + if(mountent.mnt_opts) + free(mountent.mnt_opts);*/ + } else { + printf("could not update mount table\n"); + } + } + + return 0; +} + |