44 lines
945 B
C
44 lines
945 B
C
/* vi: set sw=4 ts=4: */
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/*
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* openvt.c - open a vt to run a command.
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*
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* busyboxed by Quy Tonthat <quy@signal3.com>
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* hacked by Tito <farmatito@tiscali.it>
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*
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* Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
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*/
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/* getopt not needed */
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#include "busybox.h"
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int openvt_main(int argc, char **argv);
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int openvt_main(int argc, char **argv)
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{
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int fd;
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char vtname[sizeof(VC_FORMAT) + 2];
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if (argc < 3) {
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bb_show_usage();
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}
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/* check for illegal vt number: < 1 or > 63 */
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sprintf(vtname, VC_FORMAT, (int)xatoul_range(argv[1], 1, 63));
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if (fork() == 0) {
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/* child */
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/* leave current vt (controlling tty) */
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setsid();
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/* and grab new one */
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fd = xopen(vtname, O_RDWR);
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/* Reassign stdin, stdout and sterr */
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dup2(fd, STDIN_FILENO);
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dup2(fd, STDOUT_FILENO);
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dup2(fd, STDERR_FILENO);
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while (fd > 2) close(fd--);
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BB_EXECVP(argv[2], &argv[2]);
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_exit(1);
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}
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return EXIT_SUCCESS;
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}
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