busybox/console-tools/chvt.c

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1999-10-26 05:02:44 +05:30
/*
* chvt.c - aeb - 940227 - Change virtual terminal
*
* busyboxed by Erik Andersen
*/
#include "internal.h"
#include <sys/types.h>
#include <sys/ioctl.h>
#include <linux/vt.h>
#include <stdio.h>
#include <stdlib.h>
#include <fcntl.h>
extern int getfd(void);
int
chvt_main(int argc, char** argv)
{
int fd, num;
if ( ( argc != 2) || (**(argv+1) == '-' ) ) {
usage ("chvt N\n\nChange foreground virtual terminal to /dev/ttyN\n");
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}
fd = get_console_fd("/dev/console");
num = atoi(argv[1]);
if (ioctl(fd,VT_ACTIVATE,num)) {
perror("VT_ACTIVATE");
exit(FALSE);
}
if (ioctl(fd,VT_WAITACTIVE,num)) {
perror("VT_WAITACTIVE");
exit(FALSE);
}
exit( TRUE);
}