path: root/usr.bin/lsvfs/lsvfs.c

/*
 * lsvfs - lsit loaded VFSes
 * Garrett A. Wollman, September 1994
 * This file is in the public domain.
 *
 * $Id: lsvfs.c,v 1.4 1995/03/16 20:29:11 wollman Exp $
 */

#include <sys/types.h>
#include <sys/param.h>
#include <sys/mount.h>
#include <stdio.h>
#include <err.h>

#define FMT "%-32.32s %5d %5d %s\n"
#define HDRFMT "%-32.32s %5.5s %5.5s %s\n"
#define DASHES "-------------------------------- ----- ----- ---------------\n"

static const char *fmt_flags(int);

int
main(int argc, char **argv)
{
  int rv = 0;
  struct vfsconf *vfc;
  argc--, argv++;

  setvfsent(1);

  printf(HDRFMT, "Filesystem", "Index", "Refs", "Flags");
  fputs(DASHES, stdout);

  if(argc) {
    for(; argc; argc--, argv++) {
      vfc = getvfsbyname(*argv);
      if(vfc) {
        printf(FMT, vfc->vfc_name, vfc->vfc_index, vfc->vfc_refcount,
               fmt_flags(vfc->vfc_flags));
      } else {
	warnx("VFS %s unknown or not loaded", *argv);
        rv++;
      }
    }
  } else {
    while(vfc = getvfsent()) {
      printf(FMT, vfc->vfc_name, vfc->vfc_index, vfc->vfc_refcount,
             fmt_flags(vfc->vfc_flags));
    }
  }

  endvfsent();
  return rv;
}

static const char *
fmt_flags(int flags)
{
  /*
   * NB: if you add new flags, don't forget to add them here vvvvvv too.
   */
  static char buf[sizeof "static, network, read-only, synthetic, loopback"];
  int comma = 0;

  buf[0] = '\0';

  if(flags & VFCF_STATIC) {
    if(comma++) strcat(buf, ", ");
    strcat(buf, "static");
  }

  if(flags & VFCF_NETWORK) {
    if(comma++) strcat(buf, ", ");
    strcat(buf, "network");
  }

  if(flags & VFCF_READONLY) {
    if(comma++) strcat(buf, ", ");
    strcat(buf, "read-only");
  }

  if(flags & VFCF_SYNTHETIC) {
    if(comma++) strcat(buf, ", ");
    strcat(buf, "synthetic");
  }

  if(flags & VFCF_LOOPBACK) {
    if(comma++) strcat(buf, ", ");
    strcat(buf, "loopback");
  }

  return buf;
}