lib/libuutil/uu_pname.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, Version 1.0 only
   6  * (the "License").  You may not use this file except in compliance
   7  * with the License.
   8  *
   9  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
  10  * or http://www.opensolaris.org/os/licensing.
  11  * See the License for the specific language governing permissions
  12  * and limitations under the License.
  13  *
  14  * When distributing Covered Code, include this CDDL HEADER in each
  15  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
  16  * If applicable, add the following below this CDDL HEADER, with the
  17  * fields enclosed by brackets "[]" replaced with your own identifying
  18  * information: Portions Copyright [yyyy] [name of copyright owner]
  19  *
  20  * CDDL HEADER END
  21  */
  22 /*
  23  * Copyright 2005 Sun Microsystems, Inc.  All rights reserved.
  24  * Use is subject to license terms.
  25  */
  26
  27
  28
  29 #include "libuutil_common.h"
  30
  31 #include <libintl.h>
  32 #include <limits.h>
  33 #include <string.h>
  34 #include <stdlib.h>
  35 #include <stdarg.h>
  36 #include <stdio.h>
  37 #include <errno.h>
  38 #include <wchar.h>
  39 #include <unistd.h>
  40
  41 static const char PNAME_FMT[] = "%s: ";
  42 static const char ERRNO_FMT[] = ": %s\n";
  43
  44 static const char *pname;
  45
  46 static void
  47 uu_die_internal(int status, const char *format, va_list alist) __NORETURN;
  48
  49 int uu_exit_ok_value = EXIT_SUCCESS;
  50 int uu_exit_fatal_value = EXIT_FAILURE;
  51 int uu_exit_usage_value = 2;
  52
  53 int *
  54 uu_exit_ok(void)
  55 {
  56         return (&uu_exit_ok_value);
  57 }
  58
  59 int *
  60 uu_exit_fatal(void)
  61 {
  62         return (&uu_exit_fatal_value);
  63 }
  64
  65 int *
  66 uu_exit_usage(void)
  67 {
  68         return (&uu_exit_usage_value);
  69 }
  70
  71 void
  72 uu_alt_exit(int profile)
  73 {
  74         switch (profile) {
  75         case UU_PROFILE_DEFAULT:
  76                 uu_exit_ok_value = EXIT_SUCCESS;
  77                 uu_exit_fatal_value = EXIT_FAILURE;
  78                 uu_exit_usage_value = 2;
  79                 break;
  80         case UU_PROFILE_LAUNCHER:
  81                 uu_exit_ok_value = EXIT_SUCCESS;
  82                 uu_exit_fatal_value = 124;
  83                 uu_exit_usage_value = 125;
  84                 break;
  85         }
  86 }
  87
  88 static void
  89 uu_warn_internal(int err, const char *format, va_list alist)
  90 {
  91         if (pname != NULL)
  92                 (void) fprintf(stderr, PNAME_FMT, pname);
  93
  94         (void) vfprintf(stderr, format, alist);
  95
  96         if (strrchr(format, '\n') == NULL)
  97                 (void) fprintf(stderr, ERRNO_FMT, strerror(err));
  98 }
  99
 100 void
 101 uu_vwarn(const char *format, va_list alist)
 102 {
 103         uu_warn_internal(errno, format, alist);
 104 }
 105
 106 /*PRINTFLIKE1*/
 107 void
 108 uu_warn(const char *format, ...)
 109 {
 110         va_list alist;
 111         va_start(alist, format);
 112         uu_warn_internal(errno, format, alist);
 113         va_end(alist);
 114 }
 115
 116 static void
 117 uu_die_internal(int status, const char *format, va_list alist)
 118 {
 119         uu_warn_internal(errno, format, alist);
 120 #ifdef DEBUG
 121         {
 122                 char *cp;
 123
 124                 if (!issetugid()) {
 125                         cp = getenv("UU_DIE_ABORTS");
 126                         if (cp != NULL && *cp != '\0')
 127                                 abort();
 128                 }
 129         }
 130 #endif
 131         exit(status);
 132 }
 133
 134 void
 135 uu_vdie(const char *format, va_list alist)
 136 {
 137         uu_die_internal(UU_EXIT_FATAL, format, alist);
 138 }
 139
 140 /*PRINTFLIKE1*/
 141 void
 142 uu_die(const char *format, ...)
 143 {
 144         va_list alist;
 145         va_start(alist, format);
 146         uu_die_internal(UU_EXIT_FATAL, format, alist);
 147         va_end(alist);
 148 }
 149
 150 void
 151 uu_vxdie(int status, const char *format, va_list alist)
 152 {
 153         uu_die_internal(status, format, alist);
 154 }
 155
 156 /*PRINTFLIKE2*/
 157 void
 158 uu_xdie(int status, const char *format, ...)
 159 {
 160         va_list alist;
 161         va_start(alist, format);
 162         uu_die_internal(status, format, alist);
 163         va_end(alist);
 164 }
 165
 166 const char *
 167 uu_setpname(char *arg0)
 168 {
 169         /*
 170          * Having a NULL argv[0], while uncommon, is possible.  It
 171          * makes more sense to handle this event in uu_setpname rather
 172          * than in each of its consumers.
 173          */
 174         if (arg0 == NULL) {
 175                 pname = getexecname();
 176                 if (pname == NULL)
 177                         pname = "unknown_command";
 178                 return (pname);
 179         }
 180
 181         /*
 182          * Guard against '/' at end of command invocation.
 183          */
 184         for (;;) {
 185                 char *p = strrchr(arg0, '/');
 186                 if (p == NULL) {
 187                         pname = arg0;
 188                         break;
 189                 } else {
 190                         if (*(p + 1) == '\0') {
 191                                 *p = '\0';
 192                                 continue;
 193                         }
 194
 195                         pname = p + 1;
 196                         break;
 197                 }
 198         }
 199
 200         return (pname);
 201 }
 202
 203 const char *
 204 uu_getpname(void)
 205 {
 206         return (pname);
 207 }