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47 lines
907 B
C
47 lines
907 B
C
/* vi: set sw=4 ts=4: */
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/*
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* disalloc.c - aeb - 940501 - Disallocate virtual terminal(s)
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* Renamed deallocvt.
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*/
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#include <stdlib.h>
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#include <stdio.h>
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#include <fcntl.h>
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#include <sys/types.h>
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#include <sys/ioctl.h>
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#include "busybox.h"
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/* From <linux/vt.h> */
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static const int VT_DISALLOCATE = 0x5608; /* free memory associated to vt */
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int deallocvt_main(int argc, char *argv[])
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{
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int fd, num=0;
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if (argc > 2)
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bb_show_usage();
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fd = get_console_fd();
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/* num=0 deallocate all unused consoles */
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if (argc == 1)
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goto disallocate_all;
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num=bb_xgetlarg(argv[1], 10, 0, INT_MAX);
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switch(num)
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{
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case 0:
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bb_error_msg("0: illegal VT number");
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break;
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case 1:
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bb_error_msg("VT 1 cannot be deallocated");
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break;
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default:
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disallocate_all:
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if (ioctl(fd, VT_DISALLOCATE, num))
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bb_perror_msg_and_die("VT_DISALLOCATE");
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return EXIT_SUCCESS;
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}
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return EXIT_FAILURE;
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}
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