external/bsd/am-utils/dist/conf/umount/umount_bsd44.c

   1 /*      $NetBSD$        */
   2
   3 /*
   4  * Copyright (c) 1997-2009 Erez Zadok
   5  * Copyright (c) 1990 Jan-Simon Pendry
   6  * Copyright (c) 1990 Imperial College of Science, Technology & Medicine
   7  * Copyright (c) 1990 The Regents of the University of California.
   8  * All rights reserved.
   9  *
  10  * This code is derived from software contributed to Berkeley by
  11  * Jan-Simon Pendry at Imperial College, London.
  12  *
  13  * Redistribution and use in source and binary forms, with or without
  14  * modification, are permitted provided that the following conditions
  15  * are met:
  16  * 1. Redistributions of source code must retain the above copyright
  17  *    notice, this list of conditions and the following disclaimer.
  18  * 2. Redistributions in binary form must reproduce the above copyright
  19  *    notice, this list of conditions and the following disclaimer in the
  20  *    documentation and/or other materials provided with the distribution.
  21  * 3. All advertising materials mentioning features or use of this software
  22  *    must display the following acknowledgment:
  23  *      This product includes software developed by the University of
  24  *      California, Berkeley and its contributors.
  25  * 4. Neither the name of the University nor the names of its contributors
  26  *    may be used to endorse or promote products derived from this software
  27  *    without specific prior written permission.
  28  *
  29  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  30  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  31  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  32  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  33  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  34  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  35  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  36  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  37  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  38  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  39  * SUCH DAMAGE.
  40  *
  41  *
  42  * File: am-utils/conf/umount/umount_bsd44.c
  43  *
  44  */
  45
  46 /*
  47  * Unmounting filesystems under BSD 4.4.
  48  */
  49
  50 #ifdef HAVE_CONFIG_H
  51 # include <config.h>
  52 #endif /* HAVE_CONFIG_H */
  53 #include <am_defs.h>
  54 #include <amu.h>
  55
  56
  57 int
  58 umount_fs(char *mntdir, const char *mnttabname, u_int unmount_flags)
  59 {
  60   int error;
  61
  62 eintr:
  63   error = unmount(mntdir, 0);
  64   if (error < 0)
  65     error = errno;
  66
  67   switch (error) {
  68   case EINVAL:
  69   case ENOTBLK:
  70   case ENOENT:
  71     plog(XLOG_WARNING, "unmount: %s is not mounted", mntdir);
  72     error = 0;                  /* Not really an error */
  73     break;
  74
  75   case EINTR:
  76     /* not sure why this happens, but it does.  ask kirk one day... */
  77     dlog("%s: unmount: %m", mntdir);
  78     goto eintr;
  79
  80 #ifdef MNT2_GEN_OPT_FORCE
  81   case EBUSY:
  82   case EIO:
  83   case ESTALE:
  84     /* caller determines if forced unmounts should be used */
  85     if (unmount_flags & AMU_UMOUNT_FORCE) {
  86       error = umount2_fs(mntdir, unmount_flags);
  87       if (error < 0)
  88         error = errno;
  89       else
  90         return error;
  91     }
  92     /* fallthrough */
  93 #endif /* MNT2_GEN_OPT_FORCE */
  94
  95   default:
  96     dlog("%s: unmount: %m", mntdir);
  97     break;
  98   }
  99
 100   return error;
 101 }
 102
 103
 104 #ifdef MNT2_GEN_OPT_FORCE
 105 /* force unmount, no questions asked, without touching mnttab file */
 106 int
 107 umount2_fs(const char *mntdir, u_int unmount_flags)
 108 {
 109   int error = 0;
 110
 111   if (unmount_flags & AMU_UMOUNT_FORCE) {
 112     plog(XLOG_INFO, "umount2_fs: trying unmount/forced on %s", mntdir);
 113     error = unmount(mntdir, MNT2_GEN_OPT_FORCE);
 114     if (error < 0 && (errno == EINVAL || errno == ENOENT))
 115       error = 0;                /* ignore EINVAL/ENOENT */
 116     if (error < 0)
 117       plog(XLOG_WARNING, "%s: unmount/force: %m", mntdir);
 118     else
 119       dlog("%s: unmount/force: OK", mntdir);
 120   }
 121   return error;
 122 }
 123 #endif /* MNT2_GEN_OPT_FORCE */