1 /*
2 * Copyright (C) 2006-2009 Citrix Systems Inc.
3 *
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU Lesser General Public License as published
6 * by the Free Software Foundation; version 2.1 only. with the special
7 * exception on linking described in file LICENSE.
8 *
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU Lesser General Public License for more details.
13 */
14
15 #include <syslog.h>
16 #include <string.h>
17 #include <caml/fail.h>
18 #include <caml/mlvalues.h>
19 #include <caml/memory.h>
20 #include <caml/alloc.h>
21 #include <caml/custom.h>
22 #include <caml/signals.h>
23
24 static int __syslog_level_table[] = {
25 LOG_EMERG, LOG_ALERT, LOG_CRIT, LOG_ERR, LOG_WARNING,
26 LOG_NOTICE, LOG_INFO, LOG_DEBUG
27 };
28
29 static int __syslog_facility_table[] = {
30 LOG_AUTH, LOG_AUTHPRIV, LOG_CRON, LOG_DAEMON, LOG_FTP, LOG_KERN,
31 LOG_LOCAL0, LOG_LOCAL1, LOG_LOCAL2, LOG_LOCAL3,
32 LOG_LOCAL4, LOG_LOCAL5, LOG_LOCAL6, LOG_LOCAL7,
33 LOG_LPR | LOG_MAIL | LOG_NEWS | LOG_SYSLOG | LOG_USER | LOG_UUCP
34 };
35
stub_syslog(value facility,value level,value msg)36 value stub_syslog(value facility, value level, value msg)
37 {
38 CAMLparam3(facility, level, msg);
39 char *c_msg = strdup(String_val(msg));
40 char *s = c_msg, *ss;
41 int c_facility = __syslog_facility_table[Int_val(facility)]
42 | __syslog_level_table[Int_val(level)];
43
44 if ( !c_msg )
45 caml_raise_out_of_memory();
46
47 /*
48 * syslog() doesn't like embedded newlines, and c_msg generally
49 * contains them.
50 *
51 * Split the message in place by converting \n to \0, and issue one
52 * syslog() call per line, skipping the final iteration if c_msg ends
53 * with a newline anyway.
54 */
55 do {
56 ss = strchr(s, '\n');
57 if ( ss )
58 *ss = '\0';
59 else if ( *s == '\0' )
60 break;
61
62 caml_enter_blocking_section();
63 syslog(c_facility, "%s", s);
64 caml_leave_blocking_section();
65
66 s = ss + 1;
67 } while ( ss );
68
69 free(c_msg);
70 CAMLreturn(Val_unit);
71 }
72