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 42 main(int argc, char **argv) 43 { 44 struct xvfsconf vfc, *xvfsp; 45 size_t buflen; 46 int cnt, i, rv = 0; 47 48 argc--, argv++; 49 50 printf(HDRFMT, "Filesystem", "Num", "Refs", "Flags"); 51 fputs(DASHES, stdout); 52 53 if (argc > 0) { 54 for (; argc > 0; argc--, argv++) { 55 if (getvfsbyname(*argv, &vfc) == 0) { 56 printf(FMT, vfc.vfc_name, vfc.vfc_typenum, 57 vfc.vfc_refcount, fmt_flags(vfc.vfc_flags)); 58 } else { 59 warnx("VFS %s unknown or not loaded", *argv); 60 rv++; 61 } 62 } 63 } else { 64 if (sysctlbyname("vfs.conflist", NULL, &buflen, NULL, 0) < 0) 65 err(1, "sysctl(vfs.conflist)"); 66 xvfsp = malloc(buflen); 67 if (xvfsp == NULL) 68 errx(1, "malloc failed"); 69 if (sysctlbyname("vfs.conflist", xvfsp, &buflen, NULL, 0) < 0) 70 err(1, "sysctl(vfs.conflist)"); 71 cnt = buflen / sizeof(struct xvfsconf); 72 73 for (i = 0; i < cnt; i++) { 74 printf(FMT, xvfsp[i].vfc_name, xvfsp[i].vfc_typenum, 75 xvfsp[i].vfc_refcount, 76 fmt_flags(xvfsp[i].vfc_flags)); 77 } 78 free(xvfsp); 79 } 80 81 return (rv); 82 } 83 84 static const char * 85 fmt_flags(int flags) 86 { 87 static char buf[sizeof(struct flaglist) * sizeof(fl)]; 88 int i; 89 90 buf[0] = '\0'; 91 for (i = 0; i < (int)nitems(fl); i++) { 92 if ((flags & fl[i].flag) != 0) { 93 strlcat(buf, fl[i].str, sizeof(buf)); 94 strlcat(buf, ", ", sizeof(buf)); 95 } 96 } 97 98 /* Zap the trailing comma + space. */ 99 if (buf[0] != '\0') 100 buf[strlen(buf) - 2] = '\0'; 101 return (buf); 102 } 103