76 lines
1.8 KiB
C
76 lines
1.8 KiB
C
/** $MirBSD: chvt.c,v 1.6 2004/12/10 15:01:05 tg Exp $ */
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/*-
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* Copyright (c) 2004
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* Thorsten "mirabile" Glaser <tg@66h.42h.de>
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*
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* Licensee is hereby permitted to deal in this work without restric-
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* tion, including unlimited rights to use, publicly perform, modify,
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* merge, distribute, sell, give away or sublicence, provided all co-
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* pyright notices above, these terms and the disclaimer are retained
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* in all redistributions or reproduced in accompanying documentation
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* or other materials provided with binary redistributions.
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*
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* Licensor hereby provides this work "AS IS" and WITHOUT WARRANTY of
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* any kind, expressed or implied, to the maximum extent permitted by
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* applicable law, but with the warranty of being written without ma-
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* licious intent or gross negligence; in no event shall licensor, an
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* author or contributor be held liable for any damage, direct, indi-
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* rect or other, however caused, arising in any way out of the usage
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* of this work, even if advised of the possibility of such damage.
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*/
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#include "sh.h"
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#include <sys/ioctl.h>
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#include "ksh_stat.h"
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__RCSID("$MirBSD: chvt.c,v 1.6 2004/12/10 15:01:05 tg Exp $");
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char *
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chvt(char *f)
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{
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#ifdef HAVE_SETSID
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#ifdef TIOCSCTTY
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int fd;
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if (chown(f, 0, 0))
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return "chown";
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if (chmod(f, 0600))
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return "chmod";
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#if defined(HAVE_REVOKE) && !defined(linux)
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if (revoke(f))
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return "revoke";
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#endif
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if ((fd = open(f, O_RDWR)) == -1) {
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sleep(1);
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if ((fd = open(f, O_RDWR)) == -1)
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return "open";
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}
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switch (fork()) {
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case -1:
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return "fork";
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case 0:
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break;
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default:
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_exit(0);
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}
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if (setsid() == -1)
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return "setsid";
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if (ioctl(fd, TIOCSCTTY, NULL) == -1)
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return "ioctl";
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dup2(fd, 0);
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dup2(fd, 1);
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dup2(fd, 2);
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if (fd > 2)
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close(fd);
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return NULL;
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#else
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return "ioctl - TIOCSCTTY not implemented";
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#endif
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#else
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return "setsid not implemented";
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#endif
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}
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