1 /*- 2 * Copyright (c) 1990 The Regents of the University of California. 3 * All rights reserved. 4 * 5 * %sccs.include.redist.c% 6 */ 7 8 #if defined(LIBC_SCCS) && !defined(lint) 9 static char sccsid[] = "@(#)daemon.c 5.2 (Berkeley) 06/29/90"; 10 #endif /* LIBC_SCCS and not lint */ 11 12 #include <sys/file.h> 13 14 daemon(nochdir, noclose) 15 int nochdir, noclose; 16 { 17 int cpid; 18 19 if ((cpid = fork()) == -1) 20 return (-1); 21 if (cpid) 22 exit(0); 23 (void) setsid(); 24 if (!nochdir) 25 (void) chdir("/"); 26 if (!noclose) { 27 int devnull = open("/dev/null", O_RDWR, 0); 28 29 if (devnull != -1) { 30 (void) dup2(devnull, 0); 31 (void) dup2(devnull, 1); 32 (void) dup2(devnull, 2); 33 if (devnull > 2) 34 (void) close(devnull); 35 } 36 } 37 } 38