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-rw-r--r--networking/udhcp/common.c162
1 files changed, 0 insertions, 162 deletions
diff --git a/networking/udhcp/common.c b/networking/udhcp/common.c
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index bf2ac4417..000000000
--- a/networking/udhcp/common.c
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1/* common.c
2 *
3 * Functions for debugging and logging as well as some other
4 * simple helper functions.
5 *
6 * Russ Dill <Russ.Dill@asu.edu> 2001-2003
7 * Rewritten by Vladimir Oleynik <dzo@simtreas.ru> (C) 2003
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License, or
12 * (at your option) any later version.
13 *
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
18 *
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
22 */
23
24#include <fcntl.h>
25#include <unistd.h>
26#include <errno.h>
27#include <string.h>
28#include <stdlib.h>
29#include <signal.h>
30#include <paths.h>
31#include <sys/socket.h>
32#include <stdarg.h>
33
34#include "common.h"
35#include "pidfile.h"
36
37
38static int daemonized;
39
40long uptime(void)
41{
42 struct sysinfo info;
43 sysinfo(&info);
44 return info.uptime;
45}
46
47
48/*
49 * This function makes sure our first socket calls
50 * aren't going to fd 1 (printf badness...) and are
51 * not later closed by daemon()
52 */
53static inline void sanitize_fds(void)
54{
55 int zero;
56 if ((zero = open(_PATH_DEVNULL, O_RDWR, 0)) < 0) return;
57 while (zero < 3) zero = dup(zero);
58 close(zero);
59}
60
61
62void background(const char *pidfile)
63{
64#ifdef __uClinux__
65 LOG(LOG_ERR, "Cannot background in uclinux (yet)");
66#else /* __uClinux__ */
67 int pid_fd;
68
69 /* hold lock during fork. */
70 pid_fd = pidfile_acquire(pidfile);
71 if (daemon(0, 0) == -1) {
72 perror("fork");
73 exit(1);
74 }
75 daemonized++;
76 pidfile_write_release(pid_fd);
77#endif /* __uClinux__ */
78}
79
80
81#ifdef UDHCP_SYSLOG
82void udhcp_logging(int level, const char *fmt, ...)
83{
84 va_list p;
85 va_list p2;
86
87 va_start(p, fmt);
88 __va_copy(p2, p);
89 if(!daemonized) {
90 vprintf(fmt, p);
91 putchar('\n');
92 }
93 vsyslog(level, fmt, p2);
94 va_end(p);
95}
96
97
98void start_log_and_pid(const char *client_server, const char *pidfile)
99{
100 int pid_fd;
101
102 /* Make sure our syslog fd isn't overwritten */
103 sanitize_fds();
104
105 /* do some other misc startup stuff while we are here to save bytes */
106 pid_fd = pidfile_acquire(pidfile);
107 pidfile_write_release(pid_fd);
108
109 /* equivelent of doing a fflush after every \n */
110 setlinebuf(stdout);
111
112 openlog(client_server, LOG_PID | LOG_CONS, LOG_LOCAL0);
113 udhcp_logging(LOG_INFO, "%s (v%s) started", client_server, VERSION);
114}
115
116
117#else
118
119
120static char *syslog_level_msg[] = {
121 [LOG_EMERG] = "EMERGENCY!",
122 [LOG_ALERT] = "ALERT!",
123 [LOG_CRIT] = "critical!",
124 [LOG_WARNING] = "warning",
125 [LOG_ERR] = "error",
126 [LOG_INFO] = "info",
127 [LOG_DEBUG] = "debug"
128};
129
130
131void udhcp_logging(int level, const char *fmt, ...)
132{
133 va_list p;
134
135 va_start(p, fmt);
136 if(!daemonized) {
137 printf("%s, ", syslog_level_msg[level]);
138 vprintf(fmt, p);
139 putchar('\n');
140 }
141 va_end(p);
142}
143
144
145void start_log_and_pid(const char *client_server, const char *pidfile)
146{
147 int pid_fd;
148
149 /* Make sure our syslog fd isn't overwritten */
150 sanitize_fds();
151
152 /* do some other misc startup stuff while we are here to save bytes */
153 pid_fd = pidfile_acquire(pidfile);
154 pidfile_write_release(pid_fd);
155
156 /* equivelent of doing a fflush after every \n */
157 setlinebuf(stdout);
158
159 udhcp_logging(LOG_INFO, "%s (v%s) started", client_server, VERSION);
160}
161#endif
162