projects / unix-history / blame
| Commit | Line | Data |
|---|---|---|
| 2e5c011b MT |
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) | |
| c21ffddf | 9 | static char sccsid[] = "@(#)daemon.c 5.3 (Berkeley) %G%"; |
| 2e5c011b MT |
10 | #endif /* LIBC_SCCS and not lint */ |
| 11 | ||
| c21ffddf KB |
12 | #include <sys/fcntl.h> |
| 13 | #include <unistd.h> | |
| 14 | #include <paths.h> | |
| 2e5c011b | 15 | |
| b662bbb5 MT |
16 | daemon(nochdir, noclose) |
| 17 | int nochdir, noclose; | |
| 2e5c011b MT |
18 | { |
| 19 | int cpid; | |
| 20 | ||
| 21 | if ((cpid = fork()) == -1) | |
| 22 | return (-1); | |
| 23 | if (cpid) | |
| 24 | exit(0); | |
| 2e5c011b | 25 | (void) setsid(); |
| b662bbb5 MT |
26 | if (!nochdir) |
| 27 | (void) chdir("/"); | |
| 28 | if (!noclose) { | |
| c21ffddf | 29 | int devnull = open(_PATH_DEVNULL, O_RDWR, 0); |
| b662bbb5 MT |
30 | |
| 31 | if (devnull != -1) { | |
| c21ffddf KB |
32 | (void) dup2(devnull, STDIN_FILENO); |
| 33 | (void) dup2(devnull, STDOUT_FILENO); | |
| 34 | (void) dup2(devnull, STDERR_FILENO); | |
| b662bbb5 MT |
35 | if (devnull > 2) |
| 36 | (void) close(devnull); | |
| 37 | } | |
| 38 | } | |
| 2e5c011b | 39 | } |