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/* vi: set sw=4 ts=4: */
/*
* disalloc.c - aeb - 940501 - Disallocate virtual terminal(s)
* Renamed deallocvt.
*/
#include "internal.h"
#include <stdlib.h>
#include <stdio.h>
#include <fcntl.h>
#include <sys/types.h>
#include <sys/ioctl.h>
/* From <linux/vt.h> */
#define VT_DISALLOCATE 0x5608 /* free memory associated to vt */
int deallocvt_main(int argc, char *argv[])
{
int fd, num, i;
if ((argc != 2) || (**(argv + 1) == '-')) {
usage
("deallocvt N\n"
#ifndef BB_FEATURE_TRIVIAL_HELP
"\nDeallocate unused virtual terminal /dev/ttyN\n"
#endif
);
}
fd = get_console_fd("/dev/console");
if (argc == 1) {
/* deallocate all unused consoles */
if (ioctl(fd, VT_DISALLOCATE, 0)) {
perror("VT_DISALLOCATE");
exit( FALSE);
}
} else
for (i = 1; i < argc; i++) {
num = atoi(argv[i]);
if (num == 0)
fprintf(stderr, "%s: 0: illegal VT number\n", applet_name);
else if (num == 1)
fprintf(stderr, "%s: VT 1 cannot be deallocated\n",
applet_name);
else if (ioctl(fd, VT_DISALLOCATE, num)) {
perror("VT_DISALLOCATE");
fprintf(stderr, "%s: could not deallocate console %d\n",
applet_name, num);
exit( FALSE);
}
}
return( TRUE);
}
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