85 lines
2.3 KiB
C
85 lines
2.3 KiB
C
/*
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* util.c
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* Common utils.
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*
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* Copyright (c) 2022
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* Tom MTT. <tom@heimdall.pm>
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*
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* This file is licensed under the 3-Clause BSD License.
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* You should have received a copy of the 3-Clause BSD License
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* along with this program. If not, see
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* <https://basedwa.re/tmtt/feuille/src/branch/main/LICENSE>.
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*/
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#define _DEFAULT_SOURCE
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#include "util.h"
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#include <stdarg.h> /* for va_end, va_list, va_start */
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#include <stdio.h> /* for snprintf, vsnprintf, vfprintf, BUFSIZ, stderr */
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#include <stdlib.h> /* for exit */
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#include <syslog.h> /* for syslog, LOG_DEBUG, LOG_ERR */
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#include <unistd.h> /* for getpid */
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#include "feuille.h" /* for Settings, settings */
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/* reuse that buffer for syslogs */
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char syslog_buffer[BUFSIZ];
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/**
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* Die with an error message.
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* exit_code: the exit code to be used.
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* string: the string to be displayed. Printf format is supported.
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*/
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void die(int exit_code, char *string, ...)
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{
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va_list ap;
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va_start(ap, string);
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vfprintf(stderr, string, ap);
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va_end(ap);
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exit(exit_code);
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}
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/**
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* Send an error message to syslog.
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* string: the string to be displayed. Printf format is supported.
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*/
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void error(char *string, ...)
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{
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va_list ap;
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va_start(ap, string);
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/* prepend the PID of the current thread */
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int length = snprintf(syslog_buffer, sizeof(syslog_buffer), "ERROR[%d]: ", getpid());
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/* send the string to syslog */
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vsnprintf(syslog_buffer + length, sizeof(syslog_buffer) - length, string, ap);
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syslog(LOG_ERR, "%s", syslog_buffer);
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va_end(ap);
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}
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/**
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* Send a message to syslog if in verbose mode.
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* string: the string to be displayed. Printf format is supported.
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*/
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void verbose(int level, char *string, ...)
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{
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if (settings.verbose < level)
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return;
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va_list ap;
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va_start(ap, string);
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/* prepend the PID of the current thread */
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int length = snprintf(syslog_buffer, sizeof(syslog_buffer), "DEBUG%d[%d]: ", level, getpid());
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/* send the string to syslog */
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vsnprintf(syslog_buffer + length, sizeof(syslog_buffer) - length, string, ap);
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syslog(LOG_DEBUG, "%s", syslog_buffer);
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va_end(ap);
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}
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