1 /* 2 * Copyright (c) 1997 - 2001 Kungliga Tekniska H�gskolan 3 * (Royal Institute of Technology, Stockholm, Sweden). 4 * All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 17 * 3. Neither the name of the Institute nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 */ 33 34 #include "krb5_locl.h" 35 #include <err.h> 36 37 RCSID("$Id: warn.c 19086 2006-11-21 08:06:40Z lha $"); 38 39 static krb5_error_code _warnerr(krb5_context context, int do_errtext, 40 krb5_error_code code, int level, const char *fmt, va_list ap) 41 __attribute__((__format__(__printf__, 5, 0))); 42 43 static krb5_error_code 44 _warnerr(krb5_context context, int do_errtext, 45 krb5_error_code code, int level, const char *fmt, va_list ap) 46 { 47 char xfmt[7] = ""; 48 const char *args[2], **arg; 49 char *msg = NULL; 50 char *err_str = NULL; 51 52 args[0] = args[1] = NULL; 53 arg = args; 54 if(fmt){ 55 strlcat(xfmt, "%s", sizeof(xfmt)); 56 if(do_errtext) 57 strlcat(xfmt, ": ", sizeof(xfmt)); 58 vasprintf(&msg, fmt, ap); 59 if(msg == NULL) 60 return ENOMEM; 61 *arg++ = msg; 62 } 63 if(context && do_errtext){ 64 const char *err_msg; 65 66 strlcat(xfmt, "%s", sizeof(xfmt)); 67 68 err_str = krb5_get_error_string(context); 69 if (err_str != NULL) { 70 *arg++ = err_str; 71 } else { 72 err_msg = krb5_get_err_text(context, code); 73 if (err_msg) 74 *arg++ = err_msg; 75 else 76 *arg++ = "<unknown error>"; 77 } 78 } 79 80 if(context && context->warn_dest) 81 krb5_log(context, context->warn_dest, level, xfmt, args[0], args[1]); 82 else 83 warnx(xfmt, args[0], args[1]); 84 free(msg); 85 free(err_str); 86 return 0; 87 } 88 89 #define FUNC(ETEXT, CODE, LEVEL) \ 90 krb5_error_code ret; \ 91 va_list ap; \ 92 va_start(ap, fmt); \ 93 ret = _warnerr(context, ETEXT, CODE, LEVEL, fmt, ap); \ 94 va_end(ap); 95 96 #undef __attribute__ 97 #define __attribute__(X) 98 99 krb5_error_code KRB5_LIB_FUNCTION 100 krb5_vwarn(krb5_context context, krb5_error_code code, 101 const char *fmt, va_list ap) 102 __attribute__ ((format (printf, 3, 0))) 103 { 104 return _warnerr(context, 1, code, 1, fmt, ap); 105 } 106 107 108 krb5_error_code KRB5_LIB_FUNCTION 109 krb5_warn(krb5_context context, krb5_error_code code, const char *fmt, ...) 110 __attribute__ ((format (printf, 3, 4))) 111 { 112 FUNC(1, code, 1); 113 return ret; 114 } 115 116 krb5_error_code KRB5_LIB_FUNCTION 117 krb5_vwarnx(krb5_context context, const char *fmt, va_list ap) 118 __attribute__ ((format (printf, 2, 0))) 119 { 120 return _warnerr(context, 0, 0, 1, fmt, ap); 121 } 122 123 krb5_error_code KRB5_LIB_FUNCTION 124 krb5_warnx(krb5_context context, const char *fmt, ...) 125 __attribute__ ((format (printf, 2, 3))) 126 { 127 FUNC(0, 0, 1); 128 return ret; 129 } 130 131 krb5_error_code KRB5_LIB_FUNCTION 132 krb5_verr(krb5_context context, int eval, krb5_error_code code, 133 const char *fmt, va_list ap) 134 __attribute__ ((noreturn, format (printf, 4, 0))) 135 { 136 _warnerr(context, 1, code, 0, fmt, ap); 137 exit(eval); 138 } 139 140 141 krb5_error_code KRB5_LIB_FUNCTION 142 krb5_err(krb5_context context, int eval, krb5_error_code code, 143 const char *fmt, ...) 144 __attribute__ ((noreturn, format (printf, 4, 5))) 145 { 146 FUNC(1, code, 0); 147 exit(eval); 148 } 149 150 krb5_error_code KRB5_LIB_FUNCTION 151 krb5_verrx(krb5_context context, int eval, const char *fmt, va_list ap) 152 __attribute__ ((noreturn, format (printf, 3, 0))) 153 { 154 _warnerr(context, 0, 0, 0, fmt, ap); 155 exit(eval); 156 } 157 158 krb5_error_code KRB5_LIB_FUNCTION 159 krb5_errx(krb5_context context, int eval, const char *fmt, ...) 160 __attribute__ ((noreturn, format (printf, 3, 4))) 161 { 162 FUNC(0, 0, 0); 163 exit(eval); 164 } 165 166 krb5_error_code KRB5_LIB_FUNCTION 167 krb5_vabort(krb5_context context, krb5_error_code code, 168 const char *fmt, va_list ap) 169 __attribute__ ((noreturn, format (printf, 3, 0))) 170 { 171 _warnerr(context, 1, code, 0, fmt, ap); 172 abort(); 173 } 174 175 176 krb5_error_code KRB5_LIB_FUNCTION 177 krb5_abort(krb5_context context, krb5_error_code code, const char *fmt, ...) 178 __attribute__ ((noreturn, format (printf, 3, 4))) 179 { 180 FUNC(1, code, 0); 181 abort(); 182 } 183 184 krb5_error_code KRB5_LIB_FUNCTION 185 krb5_vabortx(krb5_context context, const char *fmt, va_list ap) 186 __attribute__ ((noreturn, format (printf, 2, 0))) 187 { 188 _warnerr(context, 0, 0, 0, fmt, ap); 189 abort(); 190 } 191 192 krb5_error_code KRB5_LIB_FUNCTION 193 krb5_abortx(krb5_context context, const char *fmt, ...) 194 __attribute__ ((noreturn, format (printf, 2, 3))) 195 { 196 FUNC(0, 0, 0); 197 abort(); 198 } 199 200 krb5_error_code KRB5_LIB_FUNCTION 201 krb5_set_warn_dest(krb5_context context, krb5_log_facility *fac) 202 { 203 context->warn_dest = fac; 204 return 0; 205 } 206 207 krb5_log_facility * KRB5_LIB_FUNCTION 208 krb5_get_warn_dest(krb5_context context) 209 { 210 return context->warn_dest; 211 } 212