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 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 * 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