xref: /illumos-gate/usr/src/lib/libc/port/gen/err.c (revision 6a634c9d)
1 /*
2  * CDDL HEADER START
3  *
4  * The contents of this file are subject to the terms of the
5  * Common Development and Distribution License (the "License").
6  * You may not use this file except in compliance with the License.
7  *
8  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9  * or http://www.opensolaris.org/os/licensing.
10  * See the License for the specific language governing permissions
11  * and limitations under the License.
12  *
13  * When distributing Covered Code, include this CDDL HEADER in each
14  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15  * If applicable, add the following below this CDDL HEADER, with the
16  * fields enclosed by brackets "[]" replaced with your own identifying
17  * information: Portions Copyright [yyyy] [name of copyright owner]
18  *
19  * CDDL HEADER END
20  */
21 
22 /*
23  * Copyright (c) 2003, 2010, Oracle and/or its affiliates. All rights reserved.
24  */
25 
26 #include "lint.h"
27 #include "file64.h"
28 #include "mtlib.h"
29 #include "thr_uberdata.h"
30 #include <sys/types.h>
31 #include <err.h>
32 #include <stdio.h>
33 #include <stdlib.h>
34 #include <stdarg.h>
35 #include <string.h>
36 #include <errno.h>
37 #include <dlfcn.h>
38 #include "stdiom.h"
39 
40 /* Function exit/warning functions and global variables. */
41 
42 const char *__progname;		/* GNU/Linux/BSD compatibility */
43 
44 #define	PROGNAMESIZE	128	/* buffer size for __progname */
45 
46 const char *
getprogname(void)47 getprogname(void)
48 {
49 	return (__progname);
50 }
51 
52 void
setprogname(const char * argv0)53 setprogname(const char *argv0)
54 {
55 	uberdata_t *udp = curthread->ul_uberdata;
56 	const char *progname;
57 
58 	if ((progname = strrchr(argv0, '/')) == NULL)
59 		progname = argv0;
60 	else
61 		progname++;
62 
63 	if (udp->progname == NULL)
64 		udp->progname = lmalloc(PROGNAMESIZE);
65 	(void) strlcpy(udp->progname, progname, PROGNAMESIZE);
66 	__progname = udp->progname;
67 }
68 
69 /* called only from libc_init() */
70 void
init_progname(void)71 init_progname(void)
72 {
73 	Dl_argsinfo_t args;
74 	const char *argv0;
75 
76 	if (dlinfo(RTLD_SELF, RTLD_DI_ARGSINFO, &args) < 0 ||
77 	    args.dla_argc <= 0 ||
78 	    (argv0 = args.dla_argv[0]) == NULL)
79 		argv0 = "UNKNOWN";
80 
81 	setprogname(argv0);
82 }
83 
84 /*
85  * warncore() is the workhorse of these functions.  Everything else has
86  * a warncore() component in it.
87  */
88 static rmutex_t *
warncore(FILE * fp,const char * fmt,va_list args)89 warncore(FILE *fp, const char *fmt, va_list args)
90 {
91 	rmutex_t *lk;
92 
93 	FLOCKFILE(lk, fp);
94 
95 	if (__progname != NULL)
96 		(void) fprintf(fp, "%s: ", __progname);
97 
98 	if (fmt != NULL) {
99 		(void) vfprintf(fp, fmt, args);
100 	}
101 
102 	return (lk);
103 }
104 
105 /* Finish a warning with a newline and a flush of stderr. */
106 static void
warnfinish(FILE * fp,rmutex_t * lk)107 warnfinish(FILE *fp, rmutex_t *lk)
108 {
109 	(void) fputc('\n', fp);
110 	(void) fflush(fp);
111 	FUNLOCKFILE(lk);
112 }
113 
114 void
_vwarnxfp(FILE * fp,const char * fmt,va_list args)115 _vwarnxfp(FILE *fp, const char *fmt, va_list args)
116 {
117 	rmutex_t *lk;
118 
119 	lk = warncore(fp, fmt, args);
120 	warnfinish(fp, lk);
121 }
122 
123 void
vwarnx(const char * fmt,va_list args)124 vwarnx(const char *fmt, va_list args)
125 {
126 	_vwarnxfp(stderr, fmt, args);
127 }
128 
129 void
_vwarnfp(FILE * fp,const char * fmt,va_list args)130 _vwarnfp(FILE *fp, const char *fmt, va_list args)
131 {
132 	int tmperr = errno;	/* Capture errno now. */
133 	rmutex_t *lk;
134 
135 	lk = warncore(fp, fmt, args);
136 	if (fmt != NULL) {
137 		(void) fputc(':', fp);
138 		(void) fputc(' ', fp);
139 	}
140 	(void) fputs(strerror(tmperr), fp);
141 	warnfinish(fp, lk);
142 }
143 
144 void
vwarn(const char * fmt,va_list args)145 vwarn(const char *fmt, va_list args)
146 {
147 	_vwarnfp(stderr, fmt, args);
148 }
149 
150 /* PRINTFLIKE1 */
151 void
warnx(const char * fmt,...)152 warnx(const char *fmt, ...)
153 {
154 	va_list args;
155 
156 	va_start(args, fmt);
157 	vwarnx(fmt, args);
158 	va_end(args);
159 }
160 
161 void
_warnfp(FILE * fp,const char * fmt,...)162 _warnfp(FILE *fp, const char *fmt, ...)
163 {
164 	va_list args;
165 
166 	va_start(args, fmt);
167 	_vwarnfp(fp, fmt, args);
168 	va_end(args);
169 }
170 
171 void
_warnxfp(FILE * fp,const char * fmt,...)172 _warnxfp(FILE *fp, const char *fmt, ...)
173 {
174 	va_list args;
175 
176 	va_start(args, fmt);
177 	_vwarnxfp(fp, fmt, args);
178 	va_end(args);
179 }
180 
181 /* PRINTFLIKE1 */
182 void
warn(const char * fmt,...)183 warn(const char *fmt, ...)
184 {
185 	va_list args;
186 
187 	va_start(args, fmt);
188 	vwarn(fmt, args);
189 	va_end(args);
190 }
191 
192 /* PRINTFLIKE2 */
193 void
err(int status,const char * fmt,...)194 err(int status, const char *fmt, ...)
195 {
196 	va_list args;
197 
198 	va_start(args, fmt);
199 	vwarn(fmt, args);
200 	va_end(args);
201 	exit(status);
202 }
203 
204 void
_errfp(FILE * fp,int status,const char * fmt,...)205 _errfp(FILE *fp, int status, const char *fmt, ...)
206 {
207 	va_list args;
208 
209 	va_start(args, fmt);
210 	_vwarnfp(fp, fmt, args);
211 	va_end(args);
212 	exit(status);
213 }
214 
215 void
verr(int status,const char * fmt,va_list args)216 verr(int status, const char *fmt, va_list args)
217 {
218 	vwarn(fmt, args);
219 	exit(status);
220 }
221 
222 void
_verrfp(FILE * fp,int status,const char * fmt,va_list args)223 _verrfp(FILE *fp, int status, const char *fmt, va_list args)
224 {
225 	_vwarnfp(fp, fmt, args);
226 	exit(status);
227 }
228 
229 /* PRINTFLIKE2 */
230 void
errx(int status,const char * fmt,...)231 errx(int status, const char *fmt, ...)
232 {
233 	va_list args;
234 
235 	va_start(args, fmt);
236 	vwarnx(fmt, args);
237 	va_end(args);
238 	exit(status);
239 }
240 
241 void
_errxfp(FILE * fp,int status,const char * fmt,...)242 _errxfp(FILE *fp, int status, const char *fmt, ...)
243 {
244 	va_list args;
245 
246 	va_start(args, fmt);
247 	_vwarnxfp(fp, fmt, args);
248 	va_end(args);
249 	exit(status);
250 }
251 
252 void
verrx(int status,const char * fmt,va_list args)253 verrx(int status, const char *fmt, va_list args)
254 {
255 	vwarnx(fmt, args);
256 	exit(status);
257 }
258 
259 void
_verrxfp(FILE * fp,int status,const char * fmt,va_list args)260 _verrxfp(FILE *fp, int status, const char *fmt, va_list args)
261 {
262 	_vwarnxfp(fp, fmt, args);
263 	exit(status);
264 }
265