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