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/param.h> 9 #include <sys/mount.h> 10 #include <sys/sysctl.h> 11 12 #include <err.h> 13 #include <stdio.h> 14 #include <stdlib.h> 15 #include <string.h> 16 17 #define FMT "%-32.32s 0x%08x %5d %s\n" 18 #define HDRFMT "%-32.32s %10s %5.5s %s\n" 19 #define DASHES "-------------------------------- " \ 20 "---------- ----- ---------------\n" 21 22 static struct flaglist { 23 int flag; 24 const char str[32]; /* must be longer than the longest one. */ 25 } fl[] = { 26 { .flag = VFCF_STATIC, .str = "static", }, 27 { .flag = VFCF_NETWORK, .str = "network", }, 28 { .flag = VFCF_READONLY, .str = "read-only", }, 29 { .flag = VFCF_SYNTHETIC, .str = "synthetic", }, 30 { .flag = VFCF_LOOPBACK, .str = "loopback", }, 31 { .flag = VFCF_UNICODE, .str = "unicode", }, 32 { .flag = VFCF_JAIL, .str = "jail", }, 33 { .flag = VFCF_DELEGADMIN, .str = "delegated-administration", }, 34 }; 35 36 static const char *fmt_flags(int); 37 38 int 39 main(int argc, char **argv) 40 { 41 struct xvfsconf vfc, *xvfsp; 42 size_t cnt, buflen; 43 int rv = 0; 44 45 argc--, argv++; 46 47 printf(HDRFMT, "Filesystem", "Num", "Refs", "Flags"); 48 fputs(DASHES, stdout); 49 50 if (argc > 0) { 51 for (; argc > 0; argc--, argv++) { 52 if (getvfsbyname(*argv, &vfc) == 0) { 53 printf(FMT, vfc.vfc_name, vfc.vfc_typenum, 54 vfc.vfc_refcount, fmt_flags(vfc.vfc_flags)); 55 } else { 56 warnx("VFS %s unknown or not loaded", *argv); 57 rv++; 58 } 59 } 60 } else { 61 if (sysctlbyname("vfs.conflist", NULL, &buflen, NULL, 0) < 0) 62 err(EXIT_FAILURE, "sysctl(vfs.conflist)"); 63 if ((xvfsp = malloc(buflen)) == NULL) 64 errx(EXIT_FAILURE, "malloc failed"); 65 if (sysctlbyname("vfs.conflist", xvfsp, &buflen, NULL, 0) < 0) 66 err(EXIT_FAILURE, "sysctl(vfs.conflist)"); 67 cnt = buflen / sizeof(struct xvfsconf); 68 69 for (size_t i = 0; i < cnt; i++) { 70 printf(FMT, xvfsp[i].vfc_name, xvfsp[i].vfc_typenum, 71 xvfsp[i].vfc_refcount, 72 fmt_flags(xvfsp[i].vfc_flags)); 73 } 74 free(xvfsp); 75 } 76 77 return (rv); 78 } 79 80 static const char * 81 fmt_flags(int flags) 82 { 83 static char buf[sizeof(struct flaglist) * sizeof(fl)]; 84 85 buf[0] = '\0'; 86 for (size_t i = 0; i < (int)nitems(fl); i++) { 87 if ((flags & fl[i].flag) != 0) { 88 strlcat(buf, fl[i].str, sizeof(buf)); 89 strlcat(buf, ", ", sizeof(buf)); 90 } 91 } 92 93 /* Zap the trailing comma + space. */ 94 if (buf[0] != '\0') 95 buf[strlen(buf) - 2] = '\0'; 96 return (buf); 97 } 98