usr.bin/lsvfs/lsvfs.c

   1 /*
   2  * lsvfs - list loaded VFSes
   3  * Garrett A. Wollman, September 1994
   4  * This file is in the public domain.
   5  *
   6  * $FreeBSD: src/usr.bin/lsvfs/lsvfs.c,v 1.13.2.1 2001/07/30 09:59:16 dd Exp $
   7  * $DragonFly: src/usr.bin/lsvfs/lsvfs.c,v 1.2 2003/06/17 04:29:28 dillon Exp $
   8  */
   9
  10 #define _NEW_VFSCONF
  11
  12 #include <sys/param.h>
  13 #include <sys/mount.h>
  14
  15 #include <err.h>
  16 #include <stdio.h>
  17 #include <string.h>
  18
  19 #define FMT "%-32.32s %5d %s\n"
  20 #define HDRFMT "%-32.32s %5.5s %s\n"
  21 #define DASHES "-------------------------------- ----- ---------------\n"
  22
  23 static const char *fmt_flags(int);
  24
  25 int
  26 main(int argc, char **argv)
  27 {
  28   int rv = 0;
  29   struct vfsconf vfc;
  30   struct ovfsconf *ovfcp;
  31   argc--, argv++;
  32
  33   setvfsent(1);
  34
  35   printf(HDRFMT, "Filesystem", "Refs", "Flags");
  36   fputs(DASHES, stdout);
  37
  38   if(argc) {
  39     for(; argc; argc--, argv++) {
  40       if (getvfsbyname(*argv, &vfc) == 0) {
  41         printf(FMT, vfc.vfc_name, vfc.vfc_refcount, fmt_flags(vfc.vfc_flags));
  42       } else {
  43         warnx("VFS %s unknown or not loaded", *argv);
  44         rv++;
  45       }
  46     }
  47   } else {
  48     while ((ovfcp = getvfsent()) != NULL) {
  49       printf(FMT, ovfcp->vfc_name, ovfcp->vfc_refcount,
  50              fmt_flags(ovfcp->vfc_flags));
  51     }
  52   }
  53
  54   endvfsent();
  55   return rv;
  56 }
  57
  58 static const char *
  59 fmt_flags(int flags)
  60 {
  61   /*
  62    * NB: if you add new flags, don't forget to add them here vvvvvv too.
  63    */
  64   static char buf[sizeof
  65     "static, network, read-only, synthetic, loopback, unicode"];
  66   int comma = 0;
  67
  68   buf[0] = '\0';
  69
  70   if(flags & VFCF_STATIC) {
  71     if(comma++) strcat(buf, ", ");
  72     strcat(buf, "static");
  73   }
  74
  75   if(flags & VFCF_NETWORK) {
  76     if(comma++) strcat(buf, ", ");
  77     strcat(buf, "network");
  78   }
  79
  80   if(flags & VFCF_READONLY) {
  81     if(comma++) strcat(buf, ", ");
  82     strcat(buf, "read-only");
  83   }
  84
  85   if(flags & VFCF_SYNTHETIC) {
  86     if(comma++) strcat(buf, ", ");
  87     strcat(buf, "synthetic");
  88   }
  89
  90   if(flags & VFCF_LOOPBACK) {
  91     if(comma++) strcat(buf, ", ");
  92     strcat(buf, "loopback");
  93   }
  94
  95   if(flags & VFCF_UNICODE) {
  96     if(comma++) strcat(buf, ", ");
  97     strcat(buf, "unicode");
  98   }
  99
 100   return buf;
 101 }