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Diffstat (limited to 'src/core/logging_systemd.c')
| -rw-r--r-- | src/core/logging_systemd.c | 117 |
1 files changed, 117 insertions, 0 deletions
diff --git a/src/core/logging_systemd.c b/src/core/logging_systemd.c new file mode 100644 index 00000000..2e86feb6 --- /dev/null +++ b/src/core/logging_systemd.c @@ -0,0 +1,117 @@ +/* + * (C) 2020 by Vadim Yanitskiy <axilirator@gmail.com> + * All Rights Reserved + * + * SPDX-License-Identifier: GPL-2.0+ + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + */ + +/*! \addtogroup logging + * @{ + * \file logging_systemd.c */ + +#include <stdio.h> +#include <syslog.h> + +/* Do not use this file as location in sd_journal_print() */ +#define SD_JOURNAL_SUPPRESS_LOCATION + +#include <systemd/sd-journal.h> + +#include <osmocom/core/talloc.h> +#include <osmocom/core/utils.h> +#include <osmocom/core/logging.h> + +/* FIXME: copy-pasted from logging_syslog.c */ +static int logp2syslog_level(unsigned int level) +{ + if (level >= LOGL_FATAL) + return LOG_CRIT; + else if (level >= LOGL_ERROR) + return LOG_ERR; + else if (level >= LOGL_NOTICE) + return LOG_NOTICE; + else if (level >= LOGL_INFO) + return LOG_INFO; + else + return LOG_DEBUG; +} + +static void _systemd_output(struct log_target *target, + unsigned int level, const char *log) +{ + /* systemd accepts the same level constants as syslog */ + sd_journal_print(logp2syslog_level(level), "%s", log); +} + +static void _systemd_raw_output(struct log_target *target, int subsys, + unsigned int level, const char *file, + int line, int cont, const char *format, + va_list ap) +{ + char buf[4096]; + int rc; + + rc = vsnprintf(buf, sizeof(buf), format, ap); + if (rc < 0) { + sd_journal_print(LOG_ERR, "vsnprintf() failed to render a message " + "originated from %s:%d (rc=%d)\n", + file, line, rc); + return; + } + + sd_journal_send("CODE_FILE=%s, CODE_LINE=%d", file, line, + "PRIORITY=%d", logp2syslog_level(level), + "OSMO_SUBSYS=%s", log_category_name(subsys), + "OSMO_SUBSYS_HEX=%4.4x", subsys, + "MESSAGE=%s", buf, + NULL); +} + +/*! Create a new logging target for systemd journal logging. + * \param[in] raw whether to offload rendering of the meta information + * (location, category) to systemd-journal. + * \returns Log target in case of success, NULL in case of error. + */ +struct log_target *log_target_create_systemd(bool raw) +{ + struct log_target *target; + + target = log_target_create(); + if (!target) + return NULL; + + target->type = LOG_TGT_TYPE_SYSTEMD; + log_target_systemd_set_raw(target, raw); + + return target; +} + +/*! Change meta information handling of an existing logging target. + * \param[in] target logging target to be modified. + * \param[in] raw whether to offload rendering of the meta information + * (location, category) to systemd-journal. + */ +void log_target_systemd_set_raw(struct log_target *target, bool raw) +{ + target->sd_journal.raw = raw; + if (raw) { + target->raw_output = _systemd_raw_output; + target->output = NULL; + } else { + target->output = _systemd_output; + target->raw_output = NULL; + } +} + +/* @} */ |