diff options
Diffstat (limited to 'source4/heimdal/lib/hx509/error.c')
| -rw-r--r-- | source4/heimdal/lib/hx509/error.c | 223 |
1 files changed, 223 insertions, 0 deletions
diff --git a/source4/heimdal/lib/hx509/error.c b/source4/heimdal/lib/hx509/error.c new file mode 100644 index 0000000000..9eeecb227c --- /dev/null +++ b/source4/heimdal/lib/hx509/error.c @@ -0,0 +1,223 @@ +/* + * Copyright (c) 2006 - 2007 Kungliga Tekniska Högskolan + * (Royal Institute of Technology, Stockholm, Sweden). + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * 3. Neither the name of the Institute nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + */ + +#include "hx_locl.h" +RCSID("$Id$"); + +/** + * @page page_error Hx509 error reporting functions + * + * See the library functions here: @ref hx509_error + */ + +struct hx509_error_data { + hx509_error next; + int code; + char *msg; +}; + +static void +free_error_string(hx509_error msg) +{ + while(msg) { + hx509_error m2 = msg->next; + free(msg->msg); + free(msg); + msg = m2; + } +} + +/** + * Resets the error strings the hx509 context. + * + * @param context A hx509 context. + * + * @ingroup hx509_error + */ + +void +hx509_clear_error_string(hx509_context context) +{ + free_error_string(context->error); + context->error = NULL; +} + +/** + * Add an error message to the hx509 context. + * + * @param context A hx509 context. + * @param flags + * - HX509_ERROR_APPEND appends the error string to the old messages + (code is updated). + * @param code error code related to error message + * @param fmt error message format + * @param ap arguments to error message format + * + * @ingroup hx509_error + */ + +void +hx509_set_error_stringv(hx509_context context, int flags, int code, + const char *fmt, va_list ap) +{ + hx509_error msg; + + msg = calloc(1, sizeof(*msg)); + if (msg == NULL) { + hx509_clear_error_string(context); + return; + } + + if (vasprintf(&msg->msg, fmt, ap) == -1) { + hx509_clear_error_string(context); + free(msg); + return; + } + msg->code = code; + + if (flags & HX509_ERROR_APPEND) { + msg->next = context->error; + context->error = msg; + } else { + free_error_string(context->error); + context->error = msg; + } +} + +/** + * See hx509_set_error_stringv(). + * + * @param context A hx509 context. + * @param flags + * - HX509_ERROR_APPEND appends the error string to the old messages + (code is updated). + * @param code error code related to error message + * @param fmt error message format + * @param ... arguments to error message format + * + * @ingroup hx509_error + */ + +void +hx509_set_error_string(hx509_context context, int flags, int code, + const char *fmt, ...) +{ + va_list ap; + + va_start(ap, fmt); + hx509_set_error_stringv(context, flags, code, fmt, ap); + va_end(ap); +} + +/** + * Get an error string from context associated with error_code. + * + * @param context A hx509 context. + * @param error_code Get error message for this error code. + * + * @return error string, free with hx509_free_error_string(). + * + * @ingroup hx509_error + */ + +char * +hx509_get_error_string(hx509_context context, int error_code) +{ + struct rk_strpool *p = NULL; + hx509_error msg = context->error; + + if (msg == NULL || msg->code != error_code) { + const char *cstr; + char *str; + + cstr = com_right(context->et_list, error_code); + if (cstr) + return strdup(cstr); + cstr = strerror(error_code); + if (cstr) + return strdup(cstr); + if (asprintf(&str, "<unknown error: %d>", error_code) == -1) + return NULL; + return str; + } + + for (msg = context->error; msg; msg = msg->next) + p = rk_strpoolprintf(p, "%s%s", msg->msg, + msg->next != NULL ? "; " : ""); + + return rk_strpoolcollect(p); +} + +/** + * Free error string returned by hx509_get_error_string(). + * + * @param str error string to free. + * + * @ingroup hx509_error + */ + +void +hx509_free_error_string(char *str) +{ + free(str); +} + +/** + * Print error message and fatally exit from error code + * + * @param context A hx509 context. + * @param exit_code exit() code from process. + * @param error_code Error code for the reason to exit. + * @param fmt format string with the exit message. + * @param ... argument to format string. + * + * @ingroup hx509_error + */ + +void +hx509_err(hx509_context context, int exit_code, + int error_code, const char *fmt, ...) +{ + va_list ap; + const char *msg; + char *str; + + va_start(ap, fmt); + vasprintf(&str, fmt, ap); + va_end(ap); + msg = hx509_get_error_string(context, error_code); + if (msg == NULL) + msg = "no error"; + + errx(exit_code, "%s: %s", str, msg); +} |