external/bsd/am-utils/dist/conf/checkmount/checkmount_svr4.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/checkmount/checkmount_svr4.c
  43  *
  44  */
  45
  46 #ifdef HAVE_CONFIG_H
  47 # include <config.h>
  48 #endif /* HAVE_CONFIG_H */
  49 #include <am_defs.h>
  50
  51 extern int is_same_host(char *name1, char *name2, struct in_addr addr2);
  52
  53
  54 int
  55 fixmount_check_mount(char *host, struct in_addr hostaddr, char *path)
  56 {
  57   FILE *mtab;
  58   struct mnttab ment;
  59   int err = 0;
  60   int found = 0;
  61
  62   /* scan mtab for path */
  63   if (!(mtab = fopen(MNTTAB, "r"))) {
  64     perror(MNTTAB);
  65     exit(1);
  66   }
  67
  68   while (!found && (err = getmntent(mtab, &ment)) == 0) {
  69     char *colon;
  70
  71     if ((colon = strchr(ment.mnt_fsname, ':'))) {
  72       *colon = '\0';
  73       if ((STREQ(colon + 1, path) ||
  74            STREQ(ment.mnt_dir, path)) &&
  75           is_same_host(ment.mnt_fsname, host, hostaddr))
  76           found = 1;
  77     }
  78   }
  79
  80   if (err > 0) {
  81     fprintf(stderr, "getmntent: %s: %s\n", MNTTAB,
  82             err == MNT_TOOLONG ? "entry exceeds MNT_LINE_MAX" :
  83             err == MNT_TOOMANY ? "too many fields in line" :
  84             err == MNT_TOOFEW ? "too few fields in line" :
  85             "unknown error code");
  86     exit(1);
  87   }
  88   (void) fclose(mtab);
  89
  90   /* XXX: Is this still valid in SunOS 5.x ? */
  91   if (!found) {
  92     char *swap;
  93
  94     /* swap files never show up in mtab, only root fs */
  95     if ((swap = strstr(path, "swap"))) {
  96       strncpy(swap, "root", 4); /* this should NOT use xstrlcpy  */
  97       found = fixmount_check_mount(host, hostaddr, path);
  98       strncpy(swap, "swap", 4); /* this should NOT use xstrlcpy  */
  99     }
 100   }
 101   return found;
 102 }