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Diffstat (limited to 'vnfs/VES/code/evel_library/evel_logging.c')
| -rw-r--r-- | vnfs/VES/code/evel_library/evel_logging.c | 181 |
1 files changed, 181 insertions, 0 deletions
diff --git a/vnfs/VES/code/evel_library/evel_logging.c b/vnfs/VES/code/evel_library/evel_logging.c new file mode 100644 index 00000000..6dabc638 --- /dev/null +++ b/vnfs/VES/code/evel_library/evel_logging.c @@ -0,0 +1,181 @@ +/**************************************************************************//** + * @file + * Wrapper for event logging built on syslog. + * + * License + * ------- + * + * Copyright(c) <2016>, AT&T Intellectual Property. All other 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. All advertising materials mentioning features or use of this software + * must display the following acknowledgement: This product includes + * software developed by the AT&T. + * 4. Neither the name of AT&T 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 AT&T INTELLECTUAL PROPERTY ''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 AT&T INTELLECTUAL PROPERTY 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 <string.h> +#include <assert.h> +#include <syslog.h> +#include <stdlib.h> +#include <sys/time.h> + +#include <curl/curl.h> + +#include "evel.h" + + +/*****************************************************************************/ +/* Debug settings. Logging is done through macros so these need to be */ +/* externally visible. */ +/*****************************************************************************/ +EVEL_LOG_LEVELS debug_level = EVEL_LOG_DEBUG; +//static char *syslog_ident = "evel"; +int debug_indent = 0; + +/*****************************************************************************/ +/* Buffers for error strings from this library. */ +/*****************************************************************************/ +static char evel_err_string[EVEL_MAX_ERROR_STRING_LEN] = "<NULL>"; + + +/**************************************************************************//** + * Initialize logging + * + * @param[in] level The debugging level - one of ::EVEL_LOG_LEVELS. + * @param[in] ident The identifier for our logs. + *****************************************************************************/ +void log_initialize(EVEL_LOG_LEVELS level, const char * ident) +{ + assert(level < EVEL_LOG_MAX); + assert(ident != NULL); + + debug_level = level; + openlog(ident, LOG_PID, LOG_USER); +} + +/**************************************************************************//** + * Descriptive text for library errors. + * + * Return a text error string that relates to the last failure. May be + * "<null>" but will never be NULL. + * + * @returns Text error string. + * + * @note Must not be freed! + *****************************************************************************/ +const char * evel_error_string(void) +{ + return(evel_err_string); +} + +/***************************************************************************//* + * Store the formatted string into the static error string and log the error. + * + * @param format Error string in standard printf format. + * @param ... Variable parameters to be substituted into the format string. + *****************************************************************************/ +void log_error_state(char * format, ...) +{ + va_list largs; + + assert(format != NULL); + va_start(largs, format); + vsnprintf(evel_err_string, EVEL_MAX_ERROR_STRING_LEN, format, largs); + va_end(largs); + EVEL_ERROR("%s", evel_err_string); +} + + +/**************************************************************************//** + * Generate a debug log. + * + * Provides an interface to syslog with formatting of the nesting level + * so that it's easier to see function entry/exit. + * + * @param[in] level The debug level - see ::EVEL_LOG_LEVELS. + * @param[in] format The output formatting in printf style. + * @param[in] ... Variable arguments as specified in the format string. + *****************************************************************************/ +void log_debug(EVEL_LOG_LEVELS level, char * format, ...) +{ + va_list largs; + int priority; + char indent_fmt[1024]; + char *syslog_fmt = NULL; + + /***************************************************************************/ + /* Test assumptions. */ + /***************************************************************************/ + assert(format != NULL); + assert(level <= EVEL_LOG_MAX); + + if (level >= debug_level) + { + if ((debug_level == EVEL_LOG_INFO) || (debug_indent == 0)) + { + /***********************************************************************/ + /* Just use the format as is. */ + /***********************************************************************/ + syslog_fmt = format; + } + else + { + /***********************************************************************/ + /* Combine the format with a preceding number of indent markers. */ + /***********************************************************************/ + sprintf(indent_fmt, "%.*s%s", + debug_indent, + INDENT_SEPARATORS, + format); + syslog_fmt = indent_fmt; + } + + /*************************************************************************/ + /* Work out the syslog priority value. */ + /*************************************************************************/ + switch (level) + { + case EVEL_LOG_ERROR: + priority = LOG_ERR; + break; + + case EVEL_LOG_INFO: + priority = LOG_INFO; + break; + + case EVEL_LOG_DEBUG: + case EVEL_LOG_SPAMMY: + default: + priority = LOG_DEBUG; + break; + } + + /*************************************************************************/ + /* Write the log to the file next, which requires the var args list. */ + /*************************************************************************/ + va_start(largs, format); + vsyslog(priority, syslog_fmt, largs); + va_end(largs); + } +}
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