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("$FreeBSD$");
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 0x%08x %5d %s\n"
21 #define HDRFMT "%-32.32s %10s %5.5s %s\n"
22 #define DASHES "-------------------------------- " \
23 "---------- ----- ---------------\n"
24
25 static struct flaglist {
26 int flag;
27 const char str[32]; /* must be longer than the longest one. */
28 } fl[] = {
29 { .flag = VFCF_STATIC, .str = "static", },
30 { .flag = VFCF_NETWORK, .str = "network", },
31 { .flag = VFCF_READONLY, .str = "read-only", },
32 { .flag = VFCF_SYNTHETIC, .str = "synthetic", },
33 { .flag = VFCF_LOOPBACK, .str = "loopback", },
34 { .flag = VFCF_UNICODE, .str = "unicode", },
35 { .flag = VFCF_JAIL, .str = "jail", },
36 { .flag = VFCF_DELEGADMIN, .str = "delegated-administration", },
37 };
38
39 static const char *fmt_flags(int);
40
41 int
main(int argc,char ** argv)42 main(int argc, char **argv)
43 {
44 int cnt, rv = 0, i;
45 struct xvfsconf vfc, *xvfsp;
46 size_t buflen;
47 argc--, argv++;
48
49 printf(HDRFMT, "Filesystem", "Num", "Refs", "Flags");
50 fputs(DASHES, stdout);
51
52 if(argc) {
53 for(; argc; argc--, argv++) {
54 if (getvfsbyname(*argv, &vfc) == 0) {
55 printf(FMT, vfc.vfc_name, vfc.vfc_typenum, vfc.vfc_refcount,
56 fmt_flags(vfc.vfc_flags));
57 } else {
58 warnx("VFS %s unknown or not loaded", *argv);
59 rv++;
60 }
61 }
62 } else {
63 if (sysctlbyname("vfs.conflist", NULL, &buflen, NULL, 0) < 0)
64 err(1, "sysctl(vfs.conflist)");
65 xvfsp = malloc(buflen);
66 if (xvfsp == NULL)
67 errx(1, "malloc failed");
68 if (sysctlbyname("vfs.conflist", xvfsp, &buflen, NULL, 0) < 0)
69 err(1, "sysctl(vfs.conflist)");
70 cnt = buflen / sizeof(struct xvfsconf);
71
72 for (i = 0; i < cnt; i++) {
73 printf(FMT, xvfsp[i].vfc_name, xvfsp[i].vfc_typenum,
74 xvfsp[i].vfc_refcount, fmt_flags(xvfsp[i].vfc_flags));
75 }
76 free(xvfsp);
77 }
78
79 return rv;
80 }
81
82 static const char *
fmt_flags(int flags)83 fmt_flags(int flags)
84 {
85 static char buf[sizeof(struct flaglist) * sizeof(fl)];
86 int i;
87
88 buf[0] = '\0';
89 for (i = 0; i < (int)nitems(fl); i++)
90 if (flags & fl[i].flag) {
91 strlcat(buf, fl[i].str, sizeof(buf));
92 strlcat(buf, ", ", sizeof(buf));
93 }
94 if (buf[0] != '\0')
95 buf[strlen(buf) - 2] = '\0';
96 return (buf);
97 }
98