error.c revision ce6676db 
1/*
2 * error message handling
3 */
4/*
5Copyright 1994, 1998  The Open Group
6
7Permission to use, copy, modify, distribute, and sell this software and its
8documentation for any purpose is hereby granted without fee, provided that
9the above copyright notice appear in all copies and that both that
10copyright notice and this permission notice appear in supporting
11documentation.
12
13The above copyright notice and this permission notice shall be included in
14all copies or substantial portions of the Software.
15
16THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL THE
19OPEN GROUP BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
20AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
21CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
22
23Except as contained in this notice, the name of The Open Group shall not be
24used in advertising or otherwise to promote the sale, use or other dealings
25in this Software without prior written authorization from The Open Group.
26 * Copyright 1991 Network Computing Devices;
27 * Portions Copyright 1987 by Digital Equipment Corporation
28 *
29 * Permission to use, copy, modify, distribute, and sell this software and
30 * its documentation for any purpose is hereby granted without fee, provided
31 * that the above copyright notice appear in all copies and that both that
32 * copyright notice and this permission notice appear in supporting
33 * documentation, and that the names of Network Computing Devices, or Digital
34 * not be used in advertising or publicity pertaining to distribution
35 * of the software without specific, written prior permission.
36 *
37 * NETWORK COMPUTING DEVICES, DIGITAL DISCLAIM ALL WARRANTIES WITH
38 * REGARD TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF
39 * MERCHANTABILITY AND FITNESS.  IN NO EVENT SHALL NETWORK COMPUTING DEVICES,
40 * OR DIGITAL BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL
41 * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
42 * PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS
43 * ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF
44 * THIS SOFTWARE.
45 */
46
47#include	"xfs-config.h"
48
49#include	<stdio.h>
50#include	<stdlib.h>
51#include	<stdarg.h>
52#include	<X11/Xos.h>
53
54#ifdef USE_SYSLOG
55#include	<syslog.h>
56#endif
57
58#include	<errno.h>
59
60#include	"misc.h"
61#include	"globals.h"
62#include	"osdep.h"
63
64Bool        UseSyslog;
65Bool        log_open = FALSE;
66char        ErrorFile[PATH_MAX];
67static char	CurrentErrorFile[PATH_MAX];
68
69static void
70abort_server(void)
71{
72    fflush(stderr);
73
74#ifdef SABER
75    saber_stop();
76#else
77    _exit(1);
78#endif
79}
80
81void
82InitErrors(void)
83{
84    int         i;
85
86#ifdef USE_SYSLOG
87    if (UseSyslog && !log_open) {
88	openlog("xfs", LOG_PID, LOG_DAEMON);
89	log_open = TRUE;
90	return;
91    }
92#endif
93
94    if (ErrorFile[0] &&
95	(!log_open || (strcmp(CurrentErrorFile, ErrorFile) != 0)) ) {
96	i = open(ErrorFile, O_WRONLY | O_APPEND | O_CREAT, 0666);
97	if (i != -1) {
98	    dup2(i, 2);
99	    close(i);
100	    log_open = TRUE;
101	} else {
102	    ErrorF("can't open error file \"%s\"\n", ErrorFile);
103	}
104	strncpy(CurrentErrorFile, ErrorFile, sizeof CurrentErrorFile);
105    }
106}
107
108void
109CloseErrors(void)
110{
111    int nullfd;
112
113    if (!log_open)
114	return;
115
116    log_open = FALSE;
117
118#ifdef USE_SYSLOG
119    if (UseSyslog) {
120	closelog();
121	return;
122    }
123#endif
124
125    close (2);
126    nullfd = open ("/dev/null", O_RDWR);
127    if (nullfd != 2) {
128	dup2 (nullfd, 2);
129	close(nullfd);
130    }
131}
132
133void
134Error(char *str)
135{
136#ifdef USE_SYSLOG
137    if (UseSyslog) {
138	syslog(LOG_ERR, "%s: %s", str, strerror(errno));
139	return;
140    }
141#endif
142    perror(str);
143}
144
145/*
146 * used for informational messages
147 */
148void
149NoticeF(char *f, ...)
150{
151    /* XXX should Notices just be ignored if not using syslog? */
152    va_list args;
153    va_start(args, f);
154#ifdef USE_SYSLOG
155    if (UseSyslog) {
156	vsyslog(LOG_NOTICE, f, args);
157	return;
158    }
159#else
160    fprintf(stderr, "%s notice: ", progname);
161    vfprintf(stderr, f, args);
162#endif /* USE_SYSLOG */
163    va_end(args);
164}
165
166/*
167 * used for non-fatal error messages
168 */
169void
170ErrorF(char * f, ...)
171{
172    va_list args;
173    va_start(args, f);
174#ifdef USE_SYSLOG
175    if (UseSyslog) {
176	vsyslog(LOG_WARNING, f, args);
177	return;
178    }
179#else
180    fprintf(stderr, "%s error: ", progname);
181    vfprintf(stderr, f, args);
182#endif
183    va_end(args);
184}
185
186void
187FatalError(char * f, ...)
188{
189    va_list args;
190    va_start(args, f);
191#ifdef USE_SYSLOG
192    if (UseSyslog) {
193	vsyslog(LOG_ERR, f, args);
194	return;
195    }
196#else
197    fprintf(stderr, "%s fatal error: ", progname);
198    vfprintf(stderr, f, args);
199#endif
200    va_end(args);
201    abort_server();
202    /* NOTREACHED */
203}
204