usr/src/cmd/fs.d/objfs/mount.c

   1 /*
   2  * CDDL HEADER START
   3  *
   4  * The contents of this file are subject to the terms of the
   5  * Common Development and Distribution License (the "License").
   6  * You may not use this file except in compliance with the License.
   7  *
   8  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
   9  * or http://www.opensolaris.org/os/licensing.
  10  * See the License for the specific language governing permissions
  11  * and limitations under the License.
  12  *
  13  * When distributing Covered Code, include this CDDL HEADER in each
  14  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
  15  * If applicable, add the following below this CDDL HEADER, with the
  16  * fields enclosed by brackets "[]" replaced with your own identifying
  17  * information: Portions Copyright [yyyy] [name of copyright owner]
  18  *
  19  * CDDL HEADER END
  20  */
  21 /*
  22  * Copyright 2007 Sun Microsystems, Inc.  All rights reserved.
  23  * Use is subject to license terms.
  24  */
  25
  26 #pragma ident   "%Z%%M% %I%     %E% SMI"
  27
  28 #include <stdio.h>
  29 #include <stdlib.h>
  30 #include <string.h>
  31 #include <libintl.h>
  32 #include <errno.h>
  33 #include <sys/fstyp.h>
  34 #include <sys/fsid.h>
  35 #include <sys/mntent.h>
  36 #include <sys/mnttab.h>
  37 #include <sys/mount.h>
  38 #include <sys/signal.h>
  39 #include <sys/stat.h>
  40 #include <fslib.h>
  41 #include <locale.h>
  42
  43 #define RET_OK          0
  44 #define RET_ERR         33
  45 #define EXIT_MAGIC      2
  46
  47 static void usage(void);
  48
  49 static char  optbuf[MAX_MNTOPT_STR] = { '\0', };
  50 static int   optsize = 0;
  51
  52 static char fstype[] = "objfs";
  53
  54 /*
  55  * usage: mount [-Ormq] [-o options] special mountp
  56  *
  57  * This mount program is exec'ed by /usr/sbin/mount if '-F objfs' is
  58  * specified.
  59  */
  60 int
  61 main(int argc, char *argv[])
  62 {
  63         int c;
  64         char *special;          /* Entity being mounted */
  65         char *mountp;           /* Entity being mounted on */
  66         char *savedoptbuf;
  67         char *myname;
  68         char *typename;
  69         int flags = 0;
  70         int error_flag = 0;
  71         int q_flag = 0;
  72
  73         int len;
  74
  75         (void) setlocale(LC_ALL, "");
  76
  77 #if !defined(TEXT_DOMAIN)
  78 #define TEXT_DOMAIN "SYS_TEST"
  79 #endif
  80         (void) textdomain(TEXT_DOMAIN);
  81
  82
  83         myname = strrchr(argv[0], '/');
  84         myname = myname ? myname + 1 : argv[0];
  85
  86         len = strlen(fstype) + 1 + strlen(myname);
  87         typename = malloc(len + 1);
  88         if (!typename) {
  89                 (void) fprintf(stderr, gettext("%s: out of memory\n"),
  90                     myname);
  91                 return (EXIT_MAGIC);
  92         }
  93
  94         (void) snprintf(typename, len, "%s %s", fstype, myname);
  95         argv[0] = typename;
  96
  97         while ((c = getopt(argc, argv, "o:rmOq")) != EOF) {
  98                 switch (c) {
  99                 case '?':
 100                         error_flag = 1;
 101                         break;
 102
 103                 case 'o':
 104                         if (strlcpy(optbuf, optarg, sizeof (optbuf)) >=
 105                             sizeof (optbuf)) {
 106                                 (void) fprintf(stderr,
 107                                     gettext("%s: Invalid argument: %s\n"),
 108                                     myname, optarg);
 109                                 free(typename);
 110                                 return (EXIT_MAGIC);
 111                         }
 112                         optsize = strlen(optbuf);
 113                         break;
 114                 case 'O':
 115                         flags |= MS_OVERLAY;
 116                         break;
 117                 case 'r':
 118                         flags |= MS_RDONLY;
 119                         break;
 120
 121                 case 'm':
 122                         flags |= MS_NOMNTTAB;
 123                         break;
 124
 125                 case 'q':
 126                         q_flag = 1;
 127                         break;
 128
 129                 default:
 130                         usage();
 131                 }
 132         }
 133         if ((argc - optind != 2) || error_flag) {
 134                 usage();
 135         }
 136         special = argv[argc - 2];
 137         mountp = argv[argc - 1];
 138
 139         if ((savedoptbuf = strdup(optbuf)) == NULL) {
 140                 (void) fprintf(stderr, gettext("%s: out of memory\n"),
 141                     myname);
 142                 free(typename);
 143                 exit(EXIT_MAGIC);
 144         }
 145         if (mount(special, mountp, flags | MS_OPTIONSTR, fstype, NULL, 0,
 146             optbuf, MAX_MNTOPT_STR)) {
 147                 (void) fprintf(stderr, "mount: ");
 148                 perror(special);
 149                 free(typename);
 150                 exit(RET_ERR);
 151         }
 152         if (optsize && !q_flag)
 153                 cmp_requested_to_actual_options(savedoptbuf, optbuf,
 154                     special, mountp);
 155         free(typename);
 156         return (RET_OK);
 157 }
 158
 159 static void
 160 usage(void)
 161 {
 162         (void) fprintf(stderr,
 163             gettext("Usage: mount [-Ormq] [-o options] special mountpoint\n"));
 164         exit(RET_ERR);
 165 }