diff options
Diffstat (limited to 'networking/udhcp/pidfile.c')
-rw-r--r-- | networking/udhcp/pidfile.c | 75 |
1 files changed, 0 insertions, 75 deletions
diff --git a/networking/udhcp/pidfile.c b/networking/udhcp/pidfile.c deleted file mode 100644 index 2e0c7533e..000000000 --- a/networking/udhcp/pidfile.c +++ /dev/null | |||
@@ -1,75 +0,0 @@ | |||
1 | /* pidfile.c | ||
2 | * | ||
3 | * Functions to assist in the writing and removing of pidfiles. | ||
4 | * | ||
5 | * Russ Dill <Russ.Dill@asu.edu> September 2001 | ||
6 | * | ||
7 | * This program is free software; you can redistribute it and/or modify | ||
8 | * it under the terms of the GNU General Public License as published by | ||
9 | * the Free Software Foundation; either version 2 of the License, or | ||
10 | * (at your option) any later version. | ||
11 | * | ||
12 | * This program is distributed in the hope that it will be useful, | ||
13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | ||
15 | * GNU General Public License for more details. | ||
16 | * | ||
17 | * You should have received a copy of the GNU General Public License | ||
18 | * along with this program; if not, write to the Free Software | ||
19 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. | ||
20 | */ | ||
21 | |||
22 | #include <sys/types.h> | ||
23 | #include <sys/stat.h> | ||
24 | #include <fcntl.h> | ||
25 | #include <unistd.h> | ||
26 | #include <stdio.h> | ||
27 | #include <stdlib.h> | ||
28 | |||
29 | #include "pidfile.h" | ||
30 | #include "common.h" | ||
31 | |||
32 | static char *saved_pidfile; | ||
33 | |||
34 | static void pidfile_delete(void) | ||
35 | { | ||
36 | if (saved_pidfile) unlink(saved_pidfile); | ||
37 | } | ||
38 | |||
39 | |||
40 | int pidfile_acquire(const char *pidfile) | ||
41 | { | ||
42 | int pid_fd; | ||
43 | if (!pidfile) return -1; | ||
44 | |||
45 | pid_fd = open(pidfile, O_CREAT | O_WRONLY, 0644); | ||
46 | if (pid_fd < 0) { | ||
47 | LOG(LOG_ERR, "Unable to open pidfile %s: %m\n", pidfile); | ||
48 | } else { | ||
49 | lockf(pid_fd, F_LOCK, 0); | ||
50 | if (!saved_pidfile) | ||
51 | atexit(pidfile_delete); | ||
52 | saved_pidfile = (char *) pidfile; | ||
53 | } | ||
54 | |||
55 | return pid_fd; | ||
56 | } | ||
57 | |||
58 | |||
59 | void pidfile_write_release(int pid_fd) | ||
60 | { | ||
61 | FILE *out; | ||
62 | |||
63 | if (pid_fd < 0) return; | ||
64 | |||
65 | if ((out = fdopen(pid_fd, "w")) != NULL) { | ||
66 | fprintf(out, "%d\n", getpid()); | ||
67 | fclose(out); | ||
68 | } | ||
69 | lockf(pid_fd, F_UNLCK, 0); | ||
70 | close(pid_fd); | ||
71 | } | ||
72 | |||
73 | |||
74 | |||
75 | |||