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 */
8
9 #include <sys/param.h>
10 #include <sys/mount.h>
11
12 #include <err.h>
13 #include <stdio.h>
14 #include <string.h>
15
16 #define FMT "%-32.32s 0x%08x %5d %s\n"
17 #define HDRFMT "%-32.32s %10s %5.5s %s\n"
18 #define DASHES "-------------------------------- " \
19 "---------- ----- ---------------\n"
20
21 static struct flaglist {
22 int flag;
23 const char str[32]; /* must be longer than the longest one. */
24 } fl[] = {
25 { .flag = VFCF_STATIC, .str = "static", },
26 { .flag = VFCF_NETWORK, .str = "network", },
27 { .flag = VFCF_READONLY, .str = "read-only", },
28 { .flag = VFCF_SYNTHETIC, .str = "synthetic", },
29 { .flag = VFCF_LOOPBACK, .str = "loopback", },
30 { .flag = VFCF_UNICODE, .str = "unicode", },
31 };
32
33 static const char *fmt_flags(int);
34
35 int
main(int argc,char ** argv)36 main(int argc, char **argv)
37 {
38 int rv = 0;
39 struct vfsconf vfc;
40 struct ovfsconf *ovfcp;
41 argc--, argv++;
42
43 setvfsent(1);
44
45 printf(HDRFMT, "Filesystem", "Num", "Refs", "Flags");
46 fputs(DASHES, stdout);
47
48 if (argc) {
49 for(; argc; argc--, argv++) {
50 if (getvfsbyname(*argv, &vfc) == 0) {
51 printf(FMT, vfc.vfc_name, vfc.vfc_typenum,
52 vfc.vfc_refcount,
53 fmt_flags(vfc.vfc_flags));
54 } else {
55 warnx("VFS %s unknown or not loaded", *argv);
56 rv = 1;
57 }
58 }
59 } else {
60 while ((ovfcp = getvfsent()) != NULL) {
61 if (getvfsbyname(ovfcp->vfc_name, &vfc) == 0) {
62 printf(FMT, vfc.vfc_name, vfc.vfc_typenum,
63 vfc.vfc_refcount,
64 fmt_flags(vfc.vfc_flags));
65 } else {
66 warnx("VFS %s unknown or not loaded", *argv);
67 rv = 1;
68 }
69 }
70 }
71
72 endvfsent();
73 return rv;
74 }
75
76 static const char *
fmt_flags(int flags)77 fmt_flags(int flags)
78 {
79 static char buf[sizeof(struct flaglist) * sizeof(fl)];
80 size_t i;
81
82 buf[0] = '\0';
83 for (i = 0; i < nitems(fl); i++)
84 if (flags & fl[i].flag) {
85 strlcat(buf, fl[i].str, sizeof(buf));
86 strlcat(buf, ", ", sizeof(buf));
87 }
88 if (buf[0] != '\0')
89 buf[strlen(buf) - 2] = '\0';
90 return (buf);
91 }
92