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/capsicum.h>
9 #include <sys/param.h>
10 #include <sys/mount.h>
11 #include <sys/sysctl.h>
12
13 #include <capsicum_helpers.h>
14 #include <err.h>
15 #include <stdio.h>
16 #include <stdlib.h>
17 #include <string.h>
18
19 #define FMT "%-32.32s 0x%08x %5d %s\n"
20 #define HDRFMT "%-32.32s %10s %5.5s %s\n"
21 #define DASHES "-------------------------------- " \
22 "---------- ----- ---------------\n"
23
24 static struct flaglist {
25 int flag;
26 const char str[32]; /* must be longer than the longest one. */
27 } fl[] = {
28 { .flag = VFCF_STATIC, .str = "static", },
29 { .flag = VFCF_NETWORK, .str = "network", },
30 { .flag = VFCF_READONLY, .str = "read-only", },
31 { .flag = VFCF_SYNTHETIC, .str = "synthetic", },
32 { .flag = VFCF_LOOPBACK, .str = "loopback", },
33 { .flag = VFCF_UNICODE, .str = "unicode", },
34 { .flag = VFCF_JAIL, .str = "jail", },
35 { .flag = VFCF_DELEGADMIN, .str = "delegated-administration", },
36 };
37
38 static const char *fmt_flags(int);
39
40 int
main(int argc,char ** argv)41 main(int argc, char **argv)
42 {
43 struct xvfsconf *xvfsp;
44 size_t cnt, buflen;
45 int rv = 0;
46
47 argc--, argv++;
48
49 if (sysctlbyname("vfs.conflist", NULL, &buflen, NULL, 0) < 0)
50 err(EXIT_FAILURE, "sysctl(vfs.conflist)");
51 if ((xvfsp = malloc(buflen)) == NULL)
52 errx(EXIT_FAILURE, "malloc failed");
53 if (sysctlbyname("vfs.conflist", xvfsp, &buflen, NULL, 0) < 0)
54 err(EXIT_FAILURE, "sysctl(vfs.conflist)");
55 cnt = buflen / sizeof(struct xvfsconf);
56
57 caph_cache_catpages();
58 if (caph_enter() != 0)
59 err(EXIT_FAILURE, "failed to enter capability mode");
60
61 printf(HDRFMT, "Filesystem", "Num", "Refs", "Flags");
62 fputs(DASHES, stdout);
63
64 for (size_t i = 0; i < cnt; i++) {
65 if (argc > 0) {
66 int j;
67 for (j = 0; j < argc; j++) {
68 if (strcmp(argv[j], xvfsp[i].vfc_name) == 0)
69 break;
70 }
71 if (j == argc)
72 continue;
73 }
74
75 printf(FMT, xvfsp[i].vfc_name, xvfsp[i].vfc_typenum,
76 xvfsp[i].vfc_refcount, fmt_flags(xvfsp[i].vfc_flags));
77 }
78 free(xvfsp);
79
80 return (rv);
81 }
82
83 static const char *
fmt_flags(int flags)84 fmt_flags(int flags)
85 {
86 static char buf[sizeof(struct flaglist) * sizeof(fl)];
87
88 buf[0] = '\0';
89 for (size_t i = 0; i < (int)nitems(fl); i++) {
90 if ((flags & fl[i].flag) != 0) {
91 strlcat(buf, fl[i].str, sizeof(buf));
92 strlcat(buf, ", ", sizeof(buf));
93 }
94 }
95
96 /* Zap the trailing comma + space. */
97 if (buf[0] != '\0')
98 buf[strlen(buf) - 2] = '\0';
99 return (buf);
100 }
101