adv_cmds/lsvfs/lsvfs.c

   1 /*
   2  * Copyright (c) 1998-2003 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * The contents of this file constitute Original Code as defined in and
   7  * are subject to the Apple Public Source License Version 1.1 (the
   8  * "License").  You may not use this file except in compliance with the
   9  * License.  Please obtain a copy of the License at
  10  * http://www.apple.com/publicsource and read it before using this file.
  11  *
  12  * This Original Code and all software distributed under the License are
  13  * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  14  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  15  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  16  * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT.  Please see the
  17  * License for the specific language governing rights and limitations
  18  * under the License.
  19  *
  20  * @APPLE_LICENSE_HEADER_END@
  21  */
  22
  23 #include <sys/mount.h>
  24 #include <sys/types.h>
  25 #include <sys/sysctl.h>
  26
  27 #include <err.h>
  28 #include <errno.h>
  29 #include <stdio.h>
  30 #include <string.h>
  31
  32 #define FMT "%-32.32s %5d %s\n"
  33 #define HDRFMT "%-32.32s %5.5s %s\n"
  34 #define DASHES "-------------------------------- ----- ---------------\n"
  35
  36 static const char *fmt_flags(int flags);
  37
  38 int
  39 main(int argc, char *argv[])
  40 {
  41         struct vfsconf vfc;
  42         int mib[4], max, x;
  43         size_t len;
  44
  45         printf(HDRFMT, "Filesystem", "Refs", "Flags");
  46         fputs(DASHES, stdout);
  47
  48         if (argc > 1) {
  49                 for (x = 1; x < argc; x++)
  50                         if (getvfsbyname(argv[x], &vfc) == 0)
  51                                 printf(FMT, vfc.vfc_name, vfc.vfc_refcount,
  52                                     fmt_flags(vfc.vfc_flags));
  53                         else
  54                                 warnx("VFS %s unknown or not loaded", argv[x]);
  55         } else {
  56                 mib[0] = CTL_VFS;
  57                 mib[1] = VFS_GENERIC;
  58                 mib[2] = VFS_MAXTYPENUM;
  59                 len  = sizeof(int);
  60                 if (sysctl(mib, 3, &max, &len, NULL, 0) != 0)
  61                         errx(1, "sysctl");
  62                 mib[2] = VFS_CONF;
  63
  64                 len = sizeof(vfc);
  65                 for (x = 0; x < max; x++) {
  66                         mib[3] = x;
  67                         if (sysctl(mib, 4, &vfc, &len, NULL, 0) != 0) {
  68                                 if (errno != ENOTSUP)
  69                                         errx(1, "sysctl");
  70                         } else {
  71                                 printf(FMT, vfc.vfc_name, vfc.vfc_refcount,
  72                                     fmt_flags(vfc.vfc_flags));
  73                         }
  74                 }
  75         }
  76
  77         return 0;
  78 }
  79
  80 static const char *
  81 fmt_flags(int flags)
  82 {
  83         static char buf[sizeof "local, dovolfs"];
  84         int comma = 0;
  85
  86         buf[0] = '\0';
  87
  88         if(flags & MNT_LOCAL) {
  89                 if(comma++) strcat(buf, ", ");
  90                 strcat(buf, "local");
  91         }
  92
  93         if(flags & MNT_DOVOLFS) {
  94                 if(comma++) strcat(buf, ", ");
  95                 strcat(buf, "dovolfs");
  96         }
  97
  98         return buf;
  99 }