usr/src/lib/libc/port/gen/err.c

   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 *
  47 getprogname(void)
  48 {
  49         return (__progname);
  50 }
  51
  52 void
  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
  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 *
  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
 107 warnfinish(FILE *fp, rmutex_t *lk)
 108 {
 109         (void) fputc('\n', fp);
 110         (void) fflush(fp);
 111         FUNLOCKFILE(lk);
 112 }
 113
 114 void
 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
 124 vwarnx(const char *fmt, va_list args)
 125 {
 126         _vwarnxfp(stderr, fmt, args);
 127 }
 128
 129 void
 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
 145 vwarn(const char *fmt, va_list args)
 146 {
 147         _vwarnfp(stderr, fmt, args);
 148 }
 149
 150 /* PRINTFLIKE1 */
 151 void
 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
 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
 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
 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
 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
 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
 216 verr(int status, const char *fmt, va_list args)
 217 {
 218         vwarn(fmt, args);
 219         exit(status);
 220 }
 221
 222 void
 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
 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
 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
 253 verrx(int status, const char *fmt, va_list args)
 254 {
 255         vwarnx(fmt, args);
 256         exit(status);
 257 }
 258
 259 void
 260 _verrxfp(FILE *fp, int status, const char *fmt, va_list args)
 261 {
 262         _vwarnxfp(fp, fmt, args);
 263         exit(status);
 264 }