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- /*-
- * Copyright (c) 1990 The Regents of the University of California.
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms are permitted provided
- * that: (1) source distributions retain this entire copyright notice and
- * comment, and (2) distributions including binaries display the following
- * acknowledgement: ``This product includes software developed by the
- * University of California, Berkeley and its contributors'' in the
- * documentation or other materials provided with the distribution and in
- * all advertising materials mentioning features or use of this software.
- * Neither the name of the University nor the names of its contributors may
- * be used to endorse or promote products derived from this software without
- * specific prior written permission.
- * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
- * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
- * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
- */
-
- #if defined(LIBC_SCCS) && !defined(lint)
- static char sccsid[] = "@(#)daemon.c 1.2 (Berkeley) 6/29/90";
- #endif /* LIBC_SCCS and not lint */
-
- #include <sys/file.h>
-
- daemon(nochdir, noclose)
- int nochdir, noclose;
- {
- int cpid;
-
- if ((cpid = fork()) == -1)
- return (-1);
- if (cpid)
- exit(0);
- (void) setsid();
- if (!nochdir)
- (void) chdir("/");
- if (!noclose) {
- int devnull = open("/dev/null", O_RDWR, 0);
-
- if (devnull != -1) {
- (void) dup2(devnull, 0);
- (void) dup2(devnull, 1);
- (void) dup2(devnull, 2);
- if (devnull > 2)
- (void) close(devnull);
- }
- }
- }
-