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files >> //usr/include/systemd/sd-journal.h
/* SPDX-License-Identifier: LGPL-2.1+ */ #ifndef foosdjournalhfoo #define foosdjournalhfoo /*** systemd is free software; you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation; either version 2.1 of the License, or (at your option) any later version. systemd 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 Lesser General Public License for more details. You should have received a copy of the GNU Lesser General Public License along with systemd; If not, see <http://www.gnu.org/licenses/>. ***/ #include <inttypes.h> #include <stdarg.h> #include <sys/types.h> #include <sys/uio.h> #include <syslog.h> #include "sd-id128.h" #include "_sd-common.h" /* Journal APIs. See sd-journal(3) for more information. */ _SD_BEGIN_DECLARATIONS; /* Write to daemon */ int sd_journal_print(int priority, const char *format, ...) _sd_printf_(2, 3); int sd_journal_printv(int priority, const char *format, va_list ap) _sd_printf_(2, 0); int sd_journal_send(const char *format, ...) _sd_printf_(1, 0) _sd_sentinel_; int sd_journal_sendv(const struct iovec *iov, int n); int sd_journal_perror(const char *message); /* Used by the macros below. You probably don't want to call this directly. */ int sd_journal_print_with_location(int priority, const char *file, const char *line, const char *func, const char *format, ...) _sd_printf_(5, 6); int sd_journal_printv_with_location(int priority, const char *file, const char *line, const char *func, const char *format, va_list ap) _sd_printf_(5, 0); int sd_journal_send_with_location(const char *file, const char *line, const char *func, const char *format, ...) _sd_printf_(4, 0) _sd_sentinel_; int sd_journal_sendv_with_location(const char *file, const char *line, const char *func, const struct iovec *iov, int n); int sd_journal_perror_with_location(const char *file, const char *line, const char *func, const char *message); /* implicitly add code location to messages sent, if this is enabled */ #ifndef SD_JOURNAL_SUPPRESS_LOCATION #define sd_journal_print(priority, ...) sd_journal_print_with_location(priority, "CODE_FILE=" __FILE__, "CODE_LINE=" _SD_STRINGIFY(__LINE__), __func__, __VA_ARGS__) #define sd_journal_printv(priority, format, ap) sd_journal_printv_with_location(priority, "CODE_FILE=" __FILE__, "CODE_LINE=" _SD_STRINGIFY(__LINE__), __func__, format, ap) #define sd_journal_send(...) sd_journal_send_with_location("CODE_FILE=" __FILE__, "CODE_LINE=" _SD_STRINGIFY(__LINE__), __func__, __VA_ARGS__) #define sd_journal_sendv(iovec, n) sd_journal_sendv_with_location("CODE_FILE=" __FILE__, "CODE_LINE=" _SD_STRINGIFY(__LINE__), __func__, iovec, n) #define sd_journal_perror(message) sd_journal_perror_with_location("CODE_FILE=" __FILE__, "CODE_LINE=" _SD_STRINGIFY(__LINE__), __func__, message) #endif int sd_journal_stream_fd(const char *identifier, int priority, int level_prefix); /* Browse journal stream */ typedef struct sd_journal sd_journal; /* Open flags */ enum { SD_JOURNAL_LOCAL_ONLY = 1 << 0, SD_JOURNAL_RUNTIME_ONLY = 1 << 1, SD_JOURNAL_SYSTEM = 1 << 2, SD_JOURNAL_CURRENT_USER = 1 << 3, SD_JOURNAL_OS_ROOT = 1 << 4, SD_JOURNAL_SYSTEM_ONLY = SD_JOURNAL_SYSTEM /* deprecated name */ }; /* Wakeup event types */ enum { SD_JOURNAL_NOP, SD_JOURNAL_APPEND, SD_JOURNAL_INVALIDATE }; int sd_journal_open(sd_journal **ret, int flags); int sd_journal_open_directory(sd_journal **ret, const char *path, int flags); int sd_journal_open_directory_fd(sd_journal **ret, int fd, int flags); int sd_journal_open_files(sd_journal **ret, const char **paths, int flags); int sd_journal_open_files_fd(sd_journal **ret, int fds[], unsigned n_fds, int flags); int sd_journal_open_container(sd_journal **ret, const char *machine, int flags); /* deprecated */ void sd_journal_close(sd_journal *j); int sd_journal_previous(sd_journal *j); int sd_journal_next(sd_journal *j); int sd_journal_previous_skip(sd_journal *j, uint64_t skip); int sd_journal_next_skip(sd_journal *j, uint64_t skip); int sd_journal_get_realtime_usec(sd_journal *j, uint64_t *ret); int sd_journal_get_monotonic_usec(sd_journal *j, uint64_t *ret, sd_id128_t *ret_boot_id); int sd_journal_set_data_threshold(sd_journal *j, size_t sz); int sd_journal_get_data_threshold(sd_journal *j, size_t *sz); int sd_journal_get_data(sd_journal *j, const char *field, const void **data, size_t *l); int sd_journal_enumerate_data(sd_journal *j, const void **data, size_t *l); void sd_journal_restart_data(sd_journal *j); int sd_journal_add_match(sd_journal *j, const void *data, size_t size); int sd_journal_add_disjunction(sd_journal *j); int sd_journal_add_conjunction(sd_journal *j); void sd_journal_flush_matches(sd_journal *j); int sd_journal_seek_head(sd_journal *j); int sd_journal_seek_tail(sd_journal *j); int sd_journal_seek_monotonic_usec(sd_journal *j, sd_id128_t boot_id, uint64_t usec); int sd_journal_seek_realtime_usec(sd_journal *j, uint64_t usec); int sd_journal_seek_cursor(sd_journal *j, const char *cursor); int sd_journal_get_cursor(sd_journal *j, char **cursor); int sd_journal_test_cursor(sd_journal *j, const char *cursor); int sd_journal_get_cutoff_realtime_usec(sd_journal *j, uint64_t *from, uint64_t *to); int sd_journal_get_cutoff_monotonic_usec(sd_journal *j, const sd_id128_t boot_id, uint64_t *from, uint64_t *to); int sd_journal_get_usage(sd_journal *j, uint64_t *bytes); int sd_journal_query_unique(sd_journal *j, const char *field); int sd_journal_enumerate_unique(sd_journal *j, const void **data, size_t *l); void sd_journal_restart_unique(sd_journal *j); int sd_journal_enumerate_fields(sd_journal *j, const char **field); void sd_journal_restart_fields(sd_journal *j); int sd_journal_get_fd(sd_journal *j); int sd_journal_get_events(sd_journal *j); int sd_journal_get_timeout(sd_journal *j, uint64_t *timeout_usec); int sd_journal_process(sd_journal *j); int sd_journal_wait(sd_journal *j, uint64_t timeout_usec); int sd_journal_reliable_fd(sd_journal *j); int sd_journal_get_catalog(sd_journal *j, char **text); int sd_journal_get_catalog_for_message_id(sd_id128_t id, char **text); int sd_journal_has_runtime_files(sd_journal *j); int sd_journal_has_persistent_files(sd_journal *j); /* The inverse condition avoids ambiguity of dangling 'else' after the macro */ #define SD_JOURNAL_FOREACH(j) \ if (sd_journal_seek_head(j) < 0) { } \ else while (sd_journal_next(j) > 0) /* The inverse condition avoids ambiguity of dangling 'else' after the macro */ #define SD_JOURNAL_FOREACH_BACKWARDS(j) \ if (sd_journal_seek_tail(j) < 0) { } \ else while (sd_journal_previous(j) > 0) /* Iterate through the data fields of the current journal entry */ #define SD_JOURNAL_FOREACH_DATA(j, data, l) \ for (sd_journal_restart_data(j); sd_journal_enumerate_data((j), &(data), &(l)) > 0; ) /* Iterate through the all known values of a specific field */ #define SD_JOURNAL_FOREACH_UNIQUE(j, data, l) \ for (sd_journal_restart_unique(j); sd_journal_enumerate_unique((j), &(data), &(l)) > 0; ) /* Iterate through all known field names */ #define SD_JOURNAL_FOREACH_FIELD(j, field) \ for (sd_journal_restart_fields(j); sd_journal_enumerate_fields((j), &(field)) > 0; ) _SD_DEFINE_POINTER_CLEANUP_FUNC(sd_journal, sd_journal_close); _SD_END_DECLARATIONS; #endif
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