contrib/amd/amd/amfs_program.c

   1 /*
   2  * Copyright (c) 1997-1999 Erez Zadok
   3  * Copyright (c) 1989 Jan-Simon Pendry
   4  * Copyright (c) 1989 Imperial College of Science, Technology & Medicine
   5  * Copyright (c) 1989 The Regents of the University of California.
   6  * All rights reserved.
   7  *
   8  * This code is derived from software contributed to Berkeley by
   9  * Jan-Simon Pendry at Imperial College, London.
  10  *
  11  * Redistribution and use in source and binary forms, with or without
  12  * modification, are permitted provided that the following conditions
  13  * are met:
  14  * 1. Redistributions of source code must retain the above copyright
  15  *    notice, this list of conditions and the following disclaimer.
  16  * 2. Redistributions in binary form must reproduce the above copyright
  17  *    notice, this list of conditions and the following disclaimer in the
  18  *    documentation and/or other materials provided with the distribution.
  19  * 3. All advertising materials mentioning features or use of this software
  20  *    must display the following acknowledgment:
  21  *      This product includes software developed by the University of
  22  *      California, Berkeley and its contributors.
  23  * 4. Neither the name of the University nor the names of its contributors
  24  *    may be used to endorse or promote products derived from this software
  25  *    without specific prior written permission.
  26  *
  27  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  28  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  29  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  30  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  31  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  32  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  33  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  34  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  35  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  36  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  37  * SUCH DAMAGE.
  38  *
  39  *      %W% (Berkeley) %G%
  40  *
  41  * $Id: amfs_program.c,v 1.5 1999/09/30 21:01:30 ezk Exp $
  42  *
  43  */
  44
  45 /*
  46  * Program file system
  47  */
  48
  49 #ifdef HAVE_CONFIG_H
  50 # include <config.h>
  51 #endif /* HAVE_CONFIG_H */
  52 #include <am_defs.h>
  53 #include <amd.h>
  54
  55 /* forward definitions */
  56 static char *amfs_program_match(am_opts *fo);
  57 static int amfs_program_fmount(mntfs *mf);
  58 static int amfs_program_fumount(mntfs *mf);
  59 static int amfs_program_init(mntfs *mf);
  60
  61 /*
  62  * Ops structure
  63  */
  64 am_ops amfs_program_ops =
  65 {
  66   "program",
  67   amfs_program_match,
  68   amfs_program_init,
  69   amfs_auto_fmount,
  70   amfs_program_fmount,
  71   amfs_auto_fumount,
  72   amfs_program_fumount,
  73   amfs_error_lookuppn,
  74   amfs_error_readdir,
  75   0,                            /* amfs_program_readlink */
  76   0,                            /* amfs_program_mounted */
  77   0,                            /* amfs_program_umounted */
  78   find_amfs_auto_srvr,
  79   FS_BACKGROUND | FS_AMQINFO
  80 };
  81
  82
  83 /*
  84  * Execute needs a mount and unmount command.
  85  */
  86 static char *
  87 amfs_program_match(am_opts *fo)
  88 {
  89   char *prog;
  90
  91   if (!fo->opt_mount || !fo->opt_unmount) {
  92     plog(XLOG_ERROR, "program: both mount and unmount must be specified");
  93     return 0;
  94   }
  95   prog = strchr(fo->opt_mount, ' ');
  96
  97   return strdup(prog ? prog + 1 : fo->opt_mount);
  98 }
  99
 100
 101 static int
 102 amfs_program_init(mntfs *mf)
 103 {
 104   /*
 105    * Save unmount command
 106    */
 107   if (mf->mf_refc == 1) {
 108     mf->mf_private = (voidp) strdup(mf->mf_fo->opt_unmount);
 109     mf->mf_prfree = (void (*)(voidp)) free;
 110   }
 111
 112   return 0;
 113 }
 114
 115
 116 static int
 117 amfs_program_exec(char *info)
 118 {
 119   char **xivec;
 120   int error;
 121
 122   /*
 123    * Split copy of command info string
 124    */
 125   info = strdup(info);
 126   if (info == 0)
 127     return ENOBUFS;
 128   xivec = strsplit(info, ' ', '\'');
 129
 130   /*
 131    * Put stdout to stderr
 132    */
 133   (void) fclose(stdout);
 134   if (!logfp)
 135     logfp = stderr;             /* initialize before possible first use */
 136   (void) dup(fileno(logfp));
 137   if (fileno(logfp) != fileno(stderr)) {
 138     (void) fclose(stderr);
 139     (void) dup(fileno(logfp));
 140   }
 141
 142   /*
 143    * Try the exec
 144    */
 145 #ifdef DEBUG
 146   amuDebug(D_FULL) {
 147     char **cp = xivec;
 148     plog(XLOG_DEBUG, "executing (un)mount command...");
 149     while (*cp) {
 150       plog(XLOG_DEBUG, "arg[%ld] = '%s'", (long) (cp - xivec), *cp);
 151       cp++;
 152     }
 153   }
 154 #endif /* DEBUG */
 155
 156   if (xivec[0] == 0 || xivec[1] == 0) {
 157     errno = EINVAL;
 158     plog(XLOG_USER, "1st/2nd args missing to (un)mount program");
 159   } else {
 160     (void) execv(xivec[0], xivec + 1);
 161   }
 162
 163   /*
 164    * Save error number
 165    */
 166   error = errno;
 167   plog(XLOG_ERROR, "exec failed: %m");
 168
 169   /*
 170    * Free allocate memory
 171    */
 172   XFREE(info);
 173   XFREE(xivec);
 174
 175   /*
 176    * Return error
 177    */
 178   return error;
 179 }
 180
 181
 182 static int
 183 amfs_program_fmount(mntfs *mf)
 184 {
 185   return amfs_program_exec(mf->mf_fo->opt_mount);
 186 }
 187
 188
 189 static int
 190 amfs_program_fumount(mntfs *mf)
 191 {
 192   return amfs_program_exec((char *) mf->mf_private);
 193 }