| Vadim Yanitskiy | e7bf435 | 2020-09-09 03:36:48 +0700 | [diff] [blame] | 1 | /* |
| 2 | * (C) 2020 by Vadim Yanitskiy <axilirator@gmail.com> |
| 3 | * All Rights Reserved |
| 4 | * |
| 5 | * SPDX-License-Identifier: GPL-2.0+ |
| 6 | * |
| 7 | * This program is free software; you can redistribute it and/or modify |
| 8 | * it under the terms of the GNU General Public License as published by |
| 9 | * the Free Software Foundation; either version 2 of the License, or |
| 10 | * (at your option) any later version. |
| 11 | * |
| 12 | * This program is distributed in the hope that it will be useful, |
| 13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 15 | * GNU General Public License for more details. |
| 16 | * |
| 17 | * You should have received a copy of the GNU General Public License along |
| 18 | * with this program; if not, write to the Free Software Foundation, Inc., |
| 19 | * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. |
| 20 | * |
| 21 | */ |
| 22 | |
| 23 | /*! \addtogroup logging |
| 24 | * @{ |
| 25 | * \file logging_systemd.c */ |
| 26 | |
| 27 | #include <stdio.h> |
| 28 | #include <syslog.h> |
| 29 | |
| 30 | /* Do not use this file as location in sd_journal_print() */ |
| 31 | #define SD_JOURNAL_SUPPRESS_LOCATION |
| 32 | |
| 33 | #include <systemd/sd-journal.h> |
| 34 | |
| 35 | #include <osmocom/core/talloc.h> |
| 36 | #include <osmocom/core/utils.h> |
| 37 | #include <osmocom/core/logging.h> |
| 38 | |
| 39 | /* FIXME: copy-pasted from logging_syslog.c */ |
| 40 | static int logp2syslog_level(unsigned int level) |
| 41 | { |
| 42 | if (level >= LOGL_FATAL) |
| 43 | return LOG_CRIT; |
| 44 | else if (level >= LOGL_ERROR) |
| 45 | return LOG_ERR; |
| 46 | else if (level >= LOGL_NOTICE) |
| 47 | return LOG_NOTICE; |
| 48 | else if (level >= LOGL_INFO) |
| 49 | return LOG_INFO; |
| 50 | else |
| 51 | return LOG_DEBUG; |
| 52 | } |
| 53 | |
| 54 | static void _systemd_output(struct log_target *target, |
| 55 | unsigned int level, const char *log) |
| 56 | { |
| 57 | /* systemd accepts the same level constants as syslog */ |
| 58 | sd_journal_print(logp2syslog_level(level), "%s", log); |
| 59 | } |
| 60 | |
| 61 | static void _systemd_raw_output(struct log_target *target, int subsys, |
| 62 | unsigned int level, const char *file, |
| 63 | int line, int cont, const char *format, |
| 64 | va_list ap) |
| 65 | { |
| 66 | char buf[4096]; |
| 67 | int rc; |
| 68 | |
| 69 | rc = vsnprintf(buf, sizeof(buf), format, ap); |
| 70 | if (rc < 0) { |
| 71 | sd_journal_print(LOG_ERR, "vsnprintf() failed to render a message " |
| 72 | "originated from %s:%d (rc=%d)\n", |
| 73 | file, line, rc); |
| 74 | return; |
| 75 | } |
| 76 | |
| 77 | sd_journal_send("CODE_FILE=%s, CODE_LINE=%d", file, line, |
| 78 | "PRIORITY=%d", logp2syslog_level(level), |
| 79 | "OSMO_SUBSYS=%s", log_category_name(subsys), |
| 80 | "OSMO_SUBSYS_HEX=%4.4x", subsys, |
| 81 | "MESSAGE=%s", buf, |
| 82 | NULL); |
| 83 | } |
| 84 | |
| 85 | /*! Create a new logging target for systemd journal logging. |
| 86 | * \param[in] raw whether to offload rendering of the meta information |
| 87 | * (location, category) to systemd-journal. |
| 88 | * \returns Log target in case of success, NULL in case of error. |
| 89 | */ |
| 90 | struct log_target *log_target_create_systemd(bool raw) |
| 91 | { |
| 92 | struct log_target *target; |
| 93 | |
| 94 | target = log_target_create(); |
| 95 | if (!target) |
| 96 | return NULL; |
| 97 | |
| 98 | target->type = LOG_TGT_TYPE_SYSTEMD; |
| 99 | log_target_systemd_set_raw(target, raw); |
| 100 | |
| 101 | return target; |
| 102 | } |
| 103 | |
| 104 | /*! Change meta information handling of an existing logging target. |
| 105 | * \param[in] target logging target to be modified. |
| 106 | * \param[in] raw whether to offload rendering of the meta information |
| 107 | * (location, category) to systemd-journal. |
| 108 | */ |
| 109 | void log_target_systemd_set_raw(struct log_target *target, bool raw) |
| 110 | { |
| 111 | target->sd_journal.raw = raw; |
| 112 | if (raw) { |
| 113 | target->raw_output = _systemd_raw_output; |
| 114 | target->output = NULL; |
| 115 | } else { |
| 116 | target->output = _systemd_output; |
| 117 | target->raw_output = NULL; |
| 118 | } |
| 119 | } |
| 120 | |
| 121 | /* @} */ |