103 lines
2.4 KiB
C
103 lines
2.4 KiB
C
/*
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* lsvfs - list loaded VFSes
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* Garrett A. Wollman, September 1994
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* This file is in the public domain.
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*
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/param.h>
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#include <sys/mount.h>
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#include <sys/sysctl.h>
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#include <err.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#define FMT "%-32.32s 0x%08x %5d %s\n"
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#define HDRFMT "%-32.32s %10s %5.5s %s\n"
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#define DASHES "-------------------------------- " \
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"---------- ----- ---------------\n"
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static struct flaglist {
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int flag;
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const char str[32]; /* must be longer than the longest one. */
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} fl[] = {
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{ .flag = VFCF_STATIC, .str = "static", },
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{ .flag = VFCF_NETWORK, .str = "network", },
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{ .flag = VFCF_READONLY, .str = "read-only", },
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{ .flag = VFCF_SYNTHETIC, .str = "synthetic", },
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{ .flag = VFCF_LOOPBACK, .str = "loopback", },
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{ .flag = VFCF_UNICODE, .str = "unicode", },
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{ .flag = VFCF_JAIL, .str = "jail", },
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{ .flag = VFCF_DELEGADMIN, .str = "delegated-administration", },
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};
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static const char *fmt_flags(int);
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int
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main(int argc, char **argv)
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{
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struct xvfsconf vfc, *xvfsp;
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size_t buflen;
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int cnt, i, rv = 0;
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argc--, argv++;
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printf(HDRFMT, "Filesystem", "Num", "Refs", "Flags");
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fputs(DASHES, stdout);
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if (argc > 0) {
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for (; argc > 0; argc--, argv++) {
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if (getvfsbyname(*argv, &vfc) == 0) {
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printf(FMT, vfc.vfc_name, vfc.vfc_typenum,
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vfc.vfc_refcount, fmt_flags(vfc.vfc_flags));
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} else {
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warnx("VFS %s unknown or not loaded", *argv);
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rv++;
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}
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}
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} else {
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if (sysctlbyname("vfs.conflist", NULL, &buflen, NULL, 0) < 0)
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err(1, "sysctl(vfs.conflist)");
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xvfsp = malloc(buflen);
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if (xvfsp == NULL)
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errx(1, "malloc failed");
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if (sysctlbyname("vfs.conflist", xvfsp, &buflen, NULL, 0) < 0)
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err(1, "sysctl(vfs.conflist)");
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cnt = buflen / sizeof(struct xvfsconf);
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for (i = 0; i < cnt; i++) {
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printf(FMT, xvfsp[i].vfc_name, xvfsp[i].vfc_typenum,
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xvfsp[i].vfc_refcount,
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fmt_flags(xvfsp[i].vfc_flags));
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}
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free(xvfsp);
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}
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return (rv);
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}
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static const char *
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fmt_flags(int flags)
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{
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static char buf[sizeof(struct flaglist) * sizeof(fl)];
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int i;
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buf[0] = '\0';
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for (i = 0; i < (int)nitems(fl); i++) {
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if ((flags & fl[i].flag) != 0) {
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strlcat(buf, fl[i].str, sizeof(buf));
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strlcat(buf, ", ", sizeof(buf));
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}
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}
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/* Zap the trailing comma + space. */
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if (buf[0] != '\0')
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buf[strlen(buf) - 2] = '\0';
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return (buf);
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}
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