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4d8a7798e7
Several functions called from the "sd(EXEC)" process try to log messages when all the file descriptors are already closed, including the logging ones. The logging functions do not expect their fds to be closed and they hit an assertion failure. The failure wants to be logged too, so there is an infinite recursion, ended by a SIGSEGV. When we close all fds, we must let log.c know about it.
104 lines
3.1 KiB
C
104 lines
3.1 KiB
C
/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
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#ifndef foologhfoo
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#define foologhfoo
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/***
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This file is part of systemd.
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Copyright 2010 Lennart Poettering
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systemd is free software; you can redistribute it and/or modify it
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under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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systemd is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with systemd; If not, see <http://www.gnu.org/licenses/>.
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***/
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#include <syslog.h>
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#include <stdbool.h>
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#include "macro.h"
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/* If set to SYSLOG and /dev/log can not be opened we fall back to
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* KSMG. If KMSG fails, we fall back to CONSOLE */
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typedef enum LogTarget{
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LOG_TARGET_CONSOLE,
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LOG_TARGET_KMSG,
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LOG_TARGET_SYSLOG,
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LOG_TARGET_SYSLOG_OR_KMSG,
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LOG_TARGET_AUTO, /* console if stderr is tty, SYSLOG_OR_KMSG otherwise */
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LOG_TARGET_NULL,
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_LOG_TARGET_MAX,
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_LOG_TARGET_INVALID = -1
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} LogTarget;
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void log_set_target(LogTarget target);
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void log_set_max_level(int level);
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int log_set_target_from_string(const char *e);
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int log_set_max_level_from_string(const char *e);
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void log_show_color(bool b);
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void log_show_location(bool b);
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int log_show_color_from_string(const char *e);
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int log_show_location_from_string(const char *e);
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LogTarget log_get_target(void);
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int log_get_max_level(void);
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int log_open(void);
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void log_close(void);
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void log_forget_fds(void);
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void log_close_syslog(void);
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void log_close_kmsg(void);
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void log_close_console(void);
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void log_parse_environment(void);
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int log_meta(
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int level,
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const char*file,
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int line,
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const char *func,
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const char *format, ...) _printf_attr_(5,6);
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_noreturn_ void log_assert(
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const char*file,
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int line,
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const char *func,
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const char *format, ...) _printf_attr_(4,5);
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/* This modifies the buffer passed! */
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int log_dump_internal(
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int level,
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const char*file,
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int line,
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const char *func,
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char *buffer);
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#define log_full(level, ...) log_meta(level, __FILE__, __LINE__, __func__, __VA_ARGS__)
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#define log_debug(...) log_meta(LOG_DEBUG, __FILE__, __LINE__, __func__, __VA_ARGS__)
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#define log_info(...) log_meta(LOG_INFO, __FILE__, __LINE__, __func__, __VA_ARGS__)
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#define log_notice(...) log_meta(LOG_NOTICE, __FILE__, __LINE__, __func__, __VA_ARGS__)
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#define log_warning(...) log_meta(LOG_WARNING, __FILE__, __LINE__, __func__, __VA_ARGS__)
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#define log_error(...) log_meta(LOG_ERR, __FILE__, __LINE__, __func__, __VA_ARGS__)
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/* This modifies the buffer passed! */
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#define log_dump(level, buffer) log_dump_internal(level, __FILE__, __LINE__, __func__, buffer)
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const char *log_target_to_string(LogTarget target);
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LogTarget log_target_from_string(const char *s);
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#endif
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