mirror of https://github.com/mpv-player/mpv
62 lines
1.6 KiB
C
62 lines
1.6 KiB
C
/* (C)2001,2002 by LGB (Gábor Lénárt), lgb@lgb.hu
|
|
Part of MPlayer project, this source is copyrighted according to GNU/GPL. */
|
|
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
#include <unistd.h>
|
|
#include <fcntl.h>
|
|
#include <errno.h>
|
|
#include <sys/types.h>
|
|
#include <sys/ioctl.h>
|
|
#include <sys/stat.h>
|
|
|
|
#include "mp_msg.h"
|
|
|
|
#ifndef FIBMAP
|
|
#define FIBMAP 1
|
|
#endif
|
|
|
|
int main ( int argc , char ** argv )
|
|
{
|
|
int fd,ret,lba=0;
|
|
if (geteuid()!=0) {
|
|
mp_msg(MSGT_CPLAYER,MSGL_FATAL, "%s must be setuid root to work\n",
|
|
argv[0]);
|
|
return 1;
|
|
}
|
|
if (seteuid(getuid()) == -1) {
|
|
mp_msg(MSGT_CPLAYER,MSGL_FATAL, "Couldn't drop privileges: %s\n",
|
|
strerror(errno));
|
|
return 1;
|
|
}
|
|
if (argc!=2 || argv[1]==NULL) {
|
|
mp_msg(MSGT_CPLAYER,MSGL_FATAL,"Usage: %s <filename>\n", argv[0]);
|
|
return 1;
|
|
}
|
|
if ((fd = open(argv[1], O_RDONLY)) == -1) {
|
|
mp_msg(MSGT_CPLAYER,MSGL_FATAL,"Cannot open file %s: %s\n",
|
|
argv[1], strerror(errno));
|
|
return 1;
|
|
}
|
|
if (seteuid(0) == -1) {
|
|
mp_msg(MSGT_CPLAYER,MSGL_FATAL, "Couldn't restore root privileges: %s\n",
|
|
strerror(errno));
|
|
return 1;
|
|
}
|
|
ret = ioctl(fd, FIBMAP, &lba);
|
|
if (seteuid(getuid()) == -1) {
|
|
mp_msg(MSGT_CPLAYER,MSGL_FATAL, "Couldn't re-drop privileges: %s\n",
|
|
strerror(errno));
|
|
return 1;
|
|
}
|
|
close(fd);
|
|
if (ret != 0) {
|
|
mp_msg(MSGT_CPLAYER,MSGL_FATAL,"fibmap ioctl failed: %s\n",
|
|
strerror(errno));
|
|
return 1;
|
|
}
|
|
printf("%d\n",lba);
|
|
return 0;
|
|
}
|