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 #include <sys/param.h> 10 #include <sys/mount.h> 11 #include <sys/sysctl.h> 12 13 #include <err.h> 14 #include <stdio.h> 15 #include <stdlib.h> 16 #include <string.h> 17 18 #define FMT "%-32.32s 0x%08x %5d %s\n" 19 #define HDRFMT "%-32.32s %10s %5.5s %s\n" 20 #define DASHES "-------------------------------- " \ 21 "---------- ----- ---------------\n" 22 23 static struct flaglist { 24 int flag; 25 const char str[32]; /* must be longer than the longest one. */ 26 } fl[] = { 27 { .flag = VFCF_STATIC, .str = "static", }, 28 { .flag = VFCF_NETWORK, .str = "network", }, 29 { .flag = VFCF_READONLY, .str = "read-only", }, 30 { .flag = VFCF_SYNTHETIC, .str = "synthetic", }, 31 { .flag = VFCF_LOOPBACK, .str = "loopback", }, 32 { .flag = VFCF_UNICODE, .str = "unicode", }, 33 { .flag = VFCF_JAIL, .str = "jail", }, 34 { .flag = VFCF_DELEGADMIN, .str = "delegated-administration", }, 35 }; 36 37 static const char *fmt_flags(int); 38 39 int 40 main(int argc, char **argv) 41 { 42 struct xvfsconf vfc, *xvfsp; 43 size_t buflen; 44 int cnt, i, rv = 0; 45 46 argc--, argv++; 47 48 printf(HDRFMT, "Filesystem", "Num", "Refs", "Flags"); 49 fputs(DASHES, stdout); 50 51 if (argc > 0) { 52 for (; argc > 0; argc--, argv++) { 53 if (getvfsbyname(*argv, &vfc) == 0) { 54 printf(FMT, vfc.vfc_name, vfc.vfc_typenum, 55 vfc.vfc_refcount, fmt_flags(vfc.vfc_flags)); 56 } else { 57 warnx("VFS %s unknown or not loaded", *argv); 58 rv++; 59 } 60 } 61 } else { 62 if (sysctlbyname("vfs.conflist", NULL, &buflen, NULL, 0) < 0) 63 err(1, "sysctl(vfs.conflist)"); 64 xvfsp = malloc(buflen); 65 if (xvfsp == NULL) 66 errx(1, "malloc failed"); 67 if (sysctlbyname("vfs.conflist", xvfsp, &buflen, NULL, 0) < 0) 68 err(1, "sysctl(vfs.conflist)"); 69 cnt = buflen / sizeof(struct xvfsconf); 70 71 for (i = 0; i < cnt; i++) { 72 printf(FMT, xvfsp[i].vfc_name, xvfsp[i].vfc_typenum, 73 xvfsp[i].vfc_refcount, 74 fmt_flags(xvfsp[i].vfc_flags)); 75 } 76 free(xvfsp); 77 } 78 79 return (rv); 80 } 81 82 static const char * 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) != 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