X-Git-Url: https://git.m6w6.name/?a=blobdiff_plain;ds=sidebyside;f=src%2Futil%2Flog.hpp;fp=src%2Futil%2Flog.hpp;h=662ef5f7c15f8e02ca0836c93e790c3b7dd7bc67;hb=5e760300d15ef4c5b7eed3fb9f37920ebca2f6ec;hp=0000000000000000000000000000000000000000;hpb=c97065e8f496be4d36ffe020fba19c6be4c2a04e;p=awesomized%2Flibmemcached diff --git a/src/util/log.hpp b/src/util/log.hpp new file mode 100644 index 00000000..662ef5f7 --- /dev/null +++ b/src/util/log.hpp @@ -0,0 +1,226 @@ +/* vim:expandtab:shiftwidth=2:tabstop=2:smarttab: + * + * Data Differential Utility library + * + * Copyright (C) 2012 Data Differential, http://datadifferential.com/ + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions are + * met: + * + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * + * * 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. + * + * * The names of its contributors may not be used to endorse or + * promote products derived from this software without specific prior + * written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS 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 COPYRIGHT + * OWNER 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. + * + */ + +#pragma once + +#include +#include +#include +#include +#include +#include +#include + +#define UTIL_MAX_ERROR_SIZE 2048 + +namespace datadifferential { +namespace util { + +/** Verbosity levels. + */ +enum verbose_t +{ + // Logging this will cause shutdown + VERBOSE_FATAL= LOG_EMERG, // syslog:LOG_EMERG + + VERBOSE_ALERT= LOG_ALERT, // syslog:LOG_ALERT + VERBOSE_CRITICAL= LOG_CRIT, // syslog:LOG_CRIT + + VERBOSE_ERROR= LOG_ERR, // syslog:LOG_ERR + + VERBOSE_WARN= LOG_WARNING, // syslog:LOG_WARNING + + VERBOSE_NOTICE= LOG_NOTICE, // syslog:LOG_NOTICE + + VERBOSE_INFO= LOG_INFO, // syslog:LOG_INFO + + VERBOSE_DEBUG= LOG_DEBUG // syslog:LOG_DEBUG +}; + +#ifndef __INTEL_COMPILER +#pragma GCC diagnostic ignored "-Wformat-nonliteral" +#endif + +struct log_info_st +{ + std::string name; + std::string filename; + int fd; + bool opt_syslog; + bool opt_file; + bool init_success; + + log_info_st(const std::string& name_arg, const std::string &filename_arg, bool syslog_arg) : + name(name_arg), + filename(filename_arg), + fd(-1), + opt_syslog(syslog_arg), + opt_file(false), + init_success(false) + { + if (opt_syslog) + { + openlog(name.c_str(), LOG_PID | LOG_NDELAY, LOG_USER); + } + + init(); + } + + void init() + { + if (filename.size()) + { + if (filename.compare("stderr") == 0) + { + fd= STDERR_FILENO; + } + else + { + fd= open(filename.c_str(), O_CREAT | O_WRONLY | O_APPEND, 0644); + if (fd == -1) + { + if (opt_syslog) + { + char buffer[1024]; + char *getcwd_ret= getcwd(buffer, sizeof(buffer)); + syslog(LOG_ERR, "Could not open log file \"%.*s\", from \"%s\", open failed with (%s)", + int(filename.size()), filename.c_str(), + getcwd_ret, + strerror(errno)); + } + std::cerr << "Could not open log file for writing, switching to stderr." << std::endl; + + fd= STDERR_FILENO; + } + } + + opt_file= true; + } + + init_success= true; + } + + bool initialized() const + { + return init_success; + } + + int file() const + { + return fd; + } + + void write(verbose_t verbose, const char *format, ...) + { + if (opt_file or opt_syslog) + { + va_list args; + va_start(args, format); + char mesg[BUFSIZ]; + int mesg_length= vsnprintf(mesg, sizeof(mesg), format, args); + va_end(args); + + if (opt_file) + { + char buffer[UTIL_MAX_ERROR_SIZE]; + int buffer_length= snprintf(buffer, sizeof(buffer), "%7s %.*s\n", verbose_name(verbose), mesg_length, mesg); + if (::write(file(), buffer, buffer_length) == -1) + { + std::cerr << "Could not write to log file." << std::endl; + syslog(LOG_EMERG, "gearmand could not open log file %s, got error %s", filename.c_str(), strerror(errno)); + } + + } + + if (opt_syslog) + { + syslog(int(verbose), "%7s %.*s", verbose_name(verbose), mesg_length, mesg); + } + } + } + + ~log_info_st() + { + if (fd != -1 and fd != STDERR_FILENO) + { + close(fd); + } + + if (opt_syslog) + { + closelog(); + } + } + +private: + const char *verbose_name(verbose_t verbose) + { + switch (verbose) + { + case VERBOSE_FATAL: + return "FATAL"; + + case VERBOSE_ALERT: + return "ALERT"; + + case VERBOSE_CRITICAL: + return "CRITICAL"; + + case VERBOSE_ERROR: + return "ERROR"; + + case VERBOSE_WARN: + return "WARNING"; + + case VERBOSE_NOTICE: + return "NOTICE"; + + case VERBOSE_INFO: + return "INFO"; + + case VERBOSE_DEBUG: + return "DEBUG"; + + default: + break; + } + + return "UNKNOWN"; + } +}; + +} // namespace util +} // namespace datadifferential