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67991cf824
done by Evin Robertson (bug#1105) and work from Manuel to make usage messages occupy less space and simplify how usage messages are displayed.
44 lines
981 B
C
44 lines
981 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 "busybox.h"
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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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/* 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, i;
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//if ((argc > 2) || ((argv == 2) && (**(argv + 1) == '-')))
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if (argc > 2)
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show_usage();
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fd = get_console_fd("/dev/console");
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if (argc == 1) {
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/* deallocate all unused consoles */
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if (ioctl(fd, VT_DISALLOCATE, 0))
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perror_msg_and_die("VT_DISALLOCATE");
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} else {
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for (i = 1; i < argc; i++) {
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num = atoi(argv[i]);
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if (num == 0)
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error_msg("0: illegal VT number");
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else if (num == 1)
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error_msg("VT 1 cannot be deallocated");
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else if (ioctl(fd, VT_DISALLOCATE, num))
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perror_msg_and_die("VT_DISALLOCATE");
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}
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}
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return EXIT_SUCCESS;
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}
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