lsvfs.c revision 173627 
1/*
2 * lsvfs - list loaded VFSes
3 * Garrett A. Wollman, September 1994
4 * This file is in the public domain.
5 *
6 */
7
8#include <sys/cdefs.h>
9__FBSDID("$FreeBSD: head/usr.bin/lsvfs/lsvfs.c 173627 2007-11-15 07:31:11Z se $");
10
11#include <sys/param.h>
12#include <sys/mount.h>
13#include <sys/sysctl.h>
14
15#include <err.h>
16#include <stdio.h>
17#include <stdlib.h>
18#include <string.h>
19
20#define FMT "%-32.32s %5d %s\n"
21#define HDRFMT "%-32.32s %5.5s %s\n"
22#define DASHES "-------------------------------- ----- ---------------\n"
23
24static const char *fmt_flags(int);
25
26int
27main(int argc, char **argv)
28{
29  int cnt, rv = 0, i;
30  struct xvfsconf vfc, *xvfsp;
31  size_t buflen;
32  argc--, argv++;
33
34  printf(HDRFMT, "Filesystem", "Refs", "Flags");
35  fputs(DASHES, stdout);
36
37  if(argc) {
38    for(; argc; argc--, argv++) {
39      if (getvfsbyname(*argv, &vfc) == 0) {
40        printf(FMT, vfc.vfc_name, vfc.vfc_refcount, fmt_flags(vfc.vfc_flags));
41      } else {
42	warnx("VFS %s unknown or not loaded", *argv);
43        rv++;
44      }
45    }
46  } else {
47    if (sysctlbyname("vfs.conflist", NULL, &buflen, NULL, 0) < 0)
48      err(1, "sysctl(vfs.conflist)");
49    xvfsp = malloc(buflen);
50    if (xvfsp == NULL)
51      errx(1, "malloc failed");
52    if (sysctlbyname("vfs.conflist", xvfsp, &buflen, NULL, 0) < 0)
53      err(1, "sysctl(vfs.conflist)");
54    cnt = buflen / sizeof(struct xvfsconf);
55
56    for (i = 0; i < cnt; i++) {
57      printf(FMT, xvfsp[i].vfc_name, xvfsp[i].vfc_refcount,
58             fmt_flags(xvfsp[i].vfc_flags));
59    }
60    free(xvfsp);
61  }
62
63  return rv;
64}
65
66static const char *
67fmt_flags(int flags)
68{
69  /*
70   * NB: if you add new flags, don't forget to add them here vvvvvv too.
71   */
72  static char buf[sizeof
73    "static, network, read-only, synthetic, loopback, unicode, jail"];
74  int comma = 0;
75
76  buf[0] = '\0';
77
78  if(flags & VFCF_STATIC) {
79    if(comma++) strcat(buf, ", ");
80    strcat(buf, "static");
81  }
82
83  if(flags & VFCF_NETWORK) {
84    if(comma++) strcat(buf, ", ");
85    strcat(buf, "network");
86  }
87
88  if(flags & VFCF_READONLY) {
89    if(comma++) strcat(buf, ", ");
90    strcat(buf, "read-only");
91  }
92
93  if(flags & VFCF_SYNTHETIC) {
94    if(comma++) strcat(buf, ", ");
95    strcat(buf, "synthetic");
96  }
97
98  if(flags & VFCF_LOOPBACK) {
99    if(comma++) strcat(buf, ", ");
100    strcat(buf, "loopback");
101  }
102
103  if(flags & VFCF_UNICODE) {
104    if(comma++) strcat(buf, ", ");
105    strcat(buf, "unicode");
106  }
107
108  if(flags & VFCF_JAIL) {
109    if(comma++) strcat(buf, ", ");
110    strcat(buf, "jail");
111  }
112
113  return buf;
114}
115