1*ebfedea0SLionel Sambuc /* $NetBSD: vsyslog.c,v 1.1.1.1 2011/04/13 18:15:44 elric Exp $ */
2*ebfedea0SLionel Sambuc
3*ebfedea0SLionel Sambuc /*
4*ebfedea0SLionel Sambuc * Copyright (c) 1995 - 2000 Kungliga Tekniska Högskolan
5*ebfedea0SLionel Sambuc * (Royal Institute of Technology, Stockholm, Sweden).
6*ebfedea0SLionel Sambuc * All rights reserved.
7*ebfedea0SLionel Sambuc *
8*ebfedea0SLionel Sambuc * Redistribution and use in source and binary forms, with or without
9*ebfedea0SLionel Sambuc * modification, are permitted provided that the following conditions
10*ebfedea0SLionel Sambuc * are met:
11*ebfedea0SLionel Sambuc *
12*ebfedea0SLionel Sambuc * 1. Redistributions of source code must retain the above copyright
13*ebfedea0SLionel Sambuc * notice, this list of conditions and the following disclaimer.
14*ebfedea0SLionel Sambuc *
15*ebfedea0SLionel Sambuc * 2. Redistributions in binary form must reproduce the above copyright
16*ebfedea0SLionel Sambuc * notice, this list of conditions and the following disclaimer in the
17*ebfedea0SLionel Sambuc * documentation and/or other materials provided with the distribution.
18*ebfedea0SLionel Sambuc *
19*ebfedea0SLionel Sambuc * 3. Neither the name of the Institute nor the names of its contributors
20*ebfedea0SLionel Sambuc * may be used to endorse or promote products derived from this software
21*ebfedea0SLionel Sambuc * without specific prior written permission.
22*ebfedea0SLionel Sambuc *
23*ebfedea0SLionel Sambuc * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
24*ebfedea0SLionel Sambuc * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
25*ebfedea0SLionel Sambuc * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
26*ebfedea0SLionel Sambuc * ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
27*ebfedea0SLionel Sambuc * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
28*ebfedea0SLionel Sambuc * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
29*ebfedea0SLionel Sambuc * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
30*ebfedea0SLionel Sambuc * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
31*ebfedea0SLionel Sambuc * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
32*ebfedea0SLionel Sambuc * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33*ebfedea0SLionel Sambuc * SUCH DAMAGE.
34*ebfedea0SLionel Sambuc */
35*ebfedea0SLionel Sambuc
36*ebfedea0SLionel Sambuc #include <config.h>
37*ebfedea0SLionel Sambuc
38*ebfedea0SLionel Sambuc #ifndef HAVE_VSYSLOG
39*ebfedea0SLionel Sambuc
40*ebfedea0SLionel Sambuc #include <stdio.h>
41*ebfedea0SLionel Sambuc #include <syslog.h>
42*ebfedea0SLionel Sambuc #include <stdarg.h>
43*ebfedea0SLionel Sambuc
44*ebfedea0SLionel Sambuc #include <krb5/roken.h>
45*ebfedea0SLionel Sambuc
46*ebfedea0SLionel Sambuc /*
47*ebfedea0SLionel Sambuc * the theory behind this is that we might be trying to call vsyslog
48*ebfedea0SLionel Sambuc * when there's no memory left, and we should try to be as useful as
49*ebfedea0SLionel Sambuc * possible. And the format string should say something about what's
50*ebfedea0SLionel Sambuc * failing.
51*ebfedea0SLionel Sambuc */
52*ebfedea0SLionel Sambuc
53*ebfedea0SLionel Sambuc static void
simple_vsyslog(int pri,const char * fmt,va_list ap)54*ebfedea0SLionel Sambuc simple_vsyslog(int pri, const char *fmt, va_list ap)
55*ebfedea0SLionel Sambuc {
56*ebfedea0SLionel Sambuc syslog (pri, "%s", fmt);
57*ebfedea0SLionel Sambuc }
58*ebfedea0SLionel Sambuc
59*ebfedea0SLionel Sambuc /*
60*ebfedea0SLionel Sambuc * do like syslog but with a `va_list'
61*ebfedea0SLionel Sambuc */
62*ebfedea0SLionel Sambuc
63*ebfedea0SLionel Sambuc ROKEN_LIB_FUNCTION void ROKEN_LIB_CALL
vsyslog(int pri,const char * fmt,va_list ap)64*ebfedea0SLionel Sambuc vsyslog(int pri, const char *fmt, va_list ap)
65*ebfedea0SLionel Sambuc {
66*ebfedea0SLionel Sambuc char *fmt2;
67*ebfedea0SLionel Sambuc const char *p;
68*ebfedea0SLionel Sambuc char *p2;
69*ebfedea0SLionel Sambuc int ret;
70*ebfedea0SLionel Sambuc int saved_errno = errno;
71*ebfedea0SLionel Sambuc int fmt_len = strlen (fmt);
72*ebfedea0SLionel Sambuc int fmt2_len = fmt_len;
73*ebfedea0SLionel Sambuc char *buf;
74*ebfedea0SLionel Sambuc
75*ebfedea0SLionel Sambuc fmt2 = malloc (fmt_len + 1);
76*ebfedea0SLionel Sambuc if (fmt2 == NULL) {
77*ebfedea0SLionel Sambuc simple_vsyslog (pri, fmt, ap);
78*ebfedea0SLionel Sambuc return;
79*ebfedea0SLionel Sambuc }
80*ebfedea0SLionel Sambuc
81*ebfedea0SLionel Sambuc for (p = fmt, p2 = fmt2; *p != '\0'; ++p) {
82*ebfedea0SLionel Sambuc if (p[0] == '%' && p[1] == 'm') {
83*ebfedea0SLionel Sambuc const char *e = strerror (saved_errno);
84*ebfedea0SLionel Sambuc int e_len = strlen (e);
85*ebfedea0SLionel Sambuc char *tmp;
86*ebfedea0SLionel Sambuc int pos;
87*ebfedea0SLionel Sambuc
88*ebfedea0SLionel Sambuc pos = p2 - fmt2;
89*ebfedea0SLionel Sambuc fmt2_len += e_len - 2;
90*ebfedea0SLionel Sambuc tmp = realloc (fmt2, fmt2_len + 1);
91*ebfedea0SLionel Sambuc if (tmp == NULL) {
92*ebfedea0SLionel Sambuc free (fmt2);
93*ebfedea0SLionel Sambuc simple_vsyslog (pri, fmt, ap);
94*ebfedea0SLionel Sambuc return;
95*ebfedea0SLionel Sambuc }
96*ebfedea0SLionel Sambuc fmt2 = tmp;
97*ebfedea0SLionel Sambuc p2 = fmt2 + pos;
98*ebfedea0SLionel Sambuc memmove (p2, e, e_len);
99*ebfedea0SLionel Sambuc p2 += e_len;
100*ebfedea0SLionel Sambuc ++p;
101*ebfedea0SLionel Sambuc } else
102*ebfedea0SLionel Sambuc *p2++ = *p;
103*ebfedea0SLionel Sambuc }
104*ebfedea0SLionel Sambuc *p2 = '\0';
105*ebfedea0SLionel Sambuc
106*ebfedea0SLionel Sambuc ret = vasprintf (&buf, fmt2, ap);
107*ebfedea0SLionel Sambuc free (fmt2);
108*ebfedea0SLionel Sambuc if (ret < 0 || buf == NULL) {
109*ebfedea0SLionel Sambuc simple_vsyslog (pri, fmt, ap);
110*ebfedea0SLionel Sambuc return;
111*ebfedea0SLionel Sambuc }
112*ebfedea0SLionel Sambuc syslog (pri, "%s", buf);
113*ebfedea0SLionel Sambuc free (buf);
114*ebfedea0SLionel Sambuc }
115*ebfedea0SLionel Sambuc #endif
116