1/* Copyright (c) 1998-2021 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
3 Contributed by Thorsten Kukuk <kukuk@vt.uni-paderborn.de>, 1998.
4
5 This program is free software; you can redistribute it and/or modify
6 it under the terms of the GNU General Public License as published
7 by the Free Software Foundation; version 2 of the License, or
8 (at your option) any later version.
9
10 This program is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 GNU General Public License for more details.
14
15 You should have received a copy of the GNU General Public License
16 along with this program; if not, see <https://www.gnu.org/licenses/>. */
17
18#include <stdarg.h>
19#include <stdio.h>
20#include <string.h>
21#include <syslog.h>
22#include <unistd.h>
23#include "dbg_log.h"
24#include "nscd.h"
25
26/* if in debug mode and we have a debug file, we write the messages to it,
27 if in debug mode and no debug file, we write the messages to stderr,
28 else to syslog. */
29
30static char *logfilename;
31FILE *dbgout;
32int debug_level;
33
34void
35set_logfile (const char *logfile)
36{
37 logfilename = strdup (logfile);
38}
39
40int
41init_logfile (void)
42{
43 if (logfilename)
44 {
45 dbgout = fopen64 (logfilename, "a");
46 return dbgout == NULL ? 0 : 1;
47 }
48 return 1;
49}
50
51void
52dbg_log (const char *fmt,...)
53{
54 va_list ap;
55 char msg2[512];
56
57 va_start (ap, fmt);
58 vsnprintf (msg2, sizeof (msg2), fmt, ap);
59
60 if (debug_level > 0)
61 {
62 time_t t = time (NULL);
63
64 struct tm now;
65 localtime_r (&t, &now);
66
67 char buf[256];
68 strftime (buf, sizeof (buf), "%c", &now);
69
70 char msg[1024];
71 snprintf (msg, sizeof (msg), "%s - %d: %s%s", buf, getpid (), msg2,
72 msg2[strlen (msg2) - 1] == '\n' ? "" : "\n");
73 if (dbgout)
74 {
75 fputs (msg, dbgout);
76 fflush (dbgout);
77 }
78 else
79 fputs (msg, stderr);
80 }
81 else
82 syslog (LOG_NOTICE, "%d %s", getpid (), msg2);
83
84 va_end (ap);
85}
86