package/aufs2-util/src/auplink.c

   1 /*
   2  * Copyright (C) 2005-2009 Junjiro Okajima
   3  *
   4  * This program, aufs is free software; you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License as published by
   6  * the Free Software Foundation; either version 2 of the License, or
   7  * (at your option) any later version.
   8  *
   9  * This program is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU General Public License
  15  * along with this program; if not, write to the Free Software
  16  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
  17  */
  18
  19 #include <stdio.h>
  20 #include <stdlib.h>
  21 #include <string.h>
  22 #include <unistd.h>
  23
  24 #include "au_util.h"
  25
  26 static void usage(char *me)
  27 {
  28         fprintf(stderr,
  29                 "usage: %s aufs_mount_point list|cpup|flush\n"
  30                 "'list' shows the pseudo-linked inode numbers and filenames.\n"
  31                 "'cpup' copies-up all pseudo-link to the writeble branch.\n"
  32                 "'flush' calls 'cpup', and then 'mount -o remount,clean_plink=inum'\n"
  33                 "and remove the whiteouted plink.\n", me);
  34         exit(EINVAL);
  35 }
  36
  37 int main(int argc, char *argv[])
  38 {
  39         int err, cmd;
  40         char *cwd;
  41
  42         if (argc != 3)
  43                 usage(argv[0]);
  44
  45         if (!strcmp(argv[2], "flush"))
  46                 cmd = AuPlink_FLUSH;
  47         else if (!strcmp(argv[2], "list"))
  48                 cmd = AuPlink_LIST;
  49         else if (!strcmp(argv[2], "cpup"))
  50                 cmd = AuPlink_CPUP;
  51         else {
  52                 errno = EINVAL;
  53                 AuFin("%s", argv[2]);
  54                 cmd = 0; /* never reach here */
  55         }
  56
  57         err = chdir(argv[1]);
  58         if (err)
  59                 AuFin("chdir");
  60         cwd = getcwd(NULL, 0); /* glibc */
  61         if (!cwd)
  62                 AuFin("getcwd");
  63         return au_plink(cwd, cmd, 1, 0);
  64 }