179 lines
2.5 KiB
C
179 lines
2.5 KiB
C
/*
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* getvfsent.c - get a listing of installed filesystems
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* Written September 1994 by Garrett A. Wollman
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* This file is in the public domain.
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*
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* $FreeBSD$
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*/
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#include <sys/param.h>
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#include <sys/types.h>
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#include <sys/mount.h>
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#include <sys/sysctl.h>
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#include <unistd.h>
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#include <sys/file.h>
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#include <sys/wait.h>
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#include <string.h>
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#include <stdlib.h>
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#include <stdio.h>
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#include <paths.h>
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/* XXX hide some compatibility problems. */
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#undef getvfsbyname
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#define vfsconf ovfsconf
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static struct vfsconf *_vfslist = 0;
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static struct vfsconf _vfsconf;
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static size_t _vfslistlen = 0;
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static int _vfs_keeplist = 0;
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static int _vfs_index = 0;
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static int
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initvfs(void)
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{
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int mib[2] = { CTL_VFS, VFS_VFSCONF };
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size_t size = 0;
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int rv;
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rv = sysctl(mib, 2, (void *)0, &size, (void *)0, (size_t)0);
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if(rv < 0)
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return 0;
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if(_vfslist)
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free(_vfslist);
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_vfslist = malloc(size);
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if(!_vfslist)
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return 0;
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rv = sysctl(mib, 2, _vfslist, &size, (void *)0, (size_t)0);
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if(rv < 0) {
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free(_vfslist);
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_vfslist = 0;
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return 0;
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}
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_vfslistlen = size / sizeof _vfslist[0];
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return 1;
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}
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struct vfsconf *
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getvfsent(void)
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{
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if(!_vfslist && !initvfs()) {
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return 0;
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}
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do {
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if(_vfs_index >= _vfslistlen) {
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return 0;
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}
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_vfsconf = _vfslist[_vfs_index++];
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} while(!_vfsconf.vfc_vfsops);
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if(!_vfs_keeplist) {
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free(_vfslist);
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_vfslist = 0;
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}
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return &_vfsconf;
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}
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struct vfsconf *
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getvfsbyname(const char *name)
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{
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int i;
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if(!_vfslist && !initvfs()) {
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return 0;
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}
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for(i = 0; i < _vfslistlen; i++) {
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if( ! strcmp(_vfslist[i].vfc_name, name) )
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break;
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}
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if(i < _vfslistlen) {
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_vfsconf = _vfslist[i];
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}
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if(!_vfs_keeplist) {
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free(_vfslist);
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_vfslist = 0;
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}
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if(i < _vfslistlen) {
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return &_vfsconf;
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} else {
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return 0;
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}
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}
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struct vfsconf *
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getvfsbytype(int type)
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{
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int i;
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if(!_vfslist && !initvfs()) {
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return 0;
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}
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for(i = 0; i < _vfslistlen; i++) {
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if(_vfslist[i].vfc_index == type)
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break;
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}
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if(i < _vfslistlen) {
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_vfsconf = _vfslist[i];
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}
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if(!_vfs_keeplist) {
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free(_vfslist);
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_vfslist = 0;
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}
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if(i < _vfslistlen) {
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return &_vfsconf;
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} else {
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return 0;
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}
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}
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void
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setvfsent(int keep)
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{
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if(_vfslist && !keep) {
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free(_vfslist);
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_vfslist = 0;
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}
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_vfs_keeplist = keep;
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_vfs_index = 0;
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}
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void
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endvfsent(void)
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{
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if(_vfslist) {
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free(_vfslist);
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_vfslist = 0;
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}
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_vfs_index = 0;
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}
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int
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vfsisloadable(const char *name)
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{
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return 1;
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}
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int
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vfsload(const char *name)
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{
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int status;
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status = kldload(name);
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return status == -1 ? status : 0;
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}
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