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| -rw-r--r-- | NEWS | 22 | ||||
| -rw-r--r-- | README.md | 74 |
2 files changed, 90 insertions, 6 deletions
@@ -2,11 +2,25 @@ Python wrappers for libsystemd API CHANGES WITH 235: - * Adapt the rename of systemd-activate to systemd-socket-activate - performed in systemd 230 + * Adapt the rename of systemd-activate to systemd-socket-activate + performed in systemd 230. - * Support for the new sd_listen_fds_with_names added in systemd 227 - is added. + * Support for the new sd_listen_fds_with_names added in systemd 227 + is added. + + * Make the Reader PY_SSIZE_T_CLEAN for py3.10 compatibility. + + * id128: update for systemd-243 compatibility and other fixes. + + * C syntax modernization. A minimum of C99 is assumed. + + * Fix seek_realtime to work with timezone aware date. + + * journal: add namespace support. + + * Memory leak fixes. + + * Documentation and other fixes. CHANGES WITH 234: @@ -76,6 +76,76 @@ The journald sendv call can also be accessed directly: The two examples should give the same results in the log. +Reading from the journal is often similar to using the `journalctl` utility. + +Show all entries since 20 minutes ago (`journalctl --since "20 minutes ago"`): + + from systemd import journal + from datetime import datetime, timedelta + j = journal.Reader() + j.seek_realtime(datetime.now() - timedelta(minutes=20)) + for entry in j: + print(entry['MESSAGE']) + +Show entries between two timestamps (`journalctl --since "50 minutes ago" --until "10 minutes ago"`): + + from systemd import journal + from datetime import datetime, timedelta + j = journal.Reader() + since = datetime.now() - timedelta(minutes=50) + until = datetime.now() - timedelta(minutes=10) + j.seek_realtime(since) + for entry in j: + if entry['__REALTIME_TIMESTAMP'] > until: + break + print(entry['MESSAGE']) + +Show explanations of log messages alongside entries (`journalctl -x`): + + from systemd import journal + j = journal.Reader() + for entry in j: + print("MESSAGE: ", entry['MESSAGE']) + try: + print("CATALOG: ", j.get_catalog()) + except: + pass + +Show entries by a specific executable (`journalctl /usr/bin/vim`): + + from systemd import journal + j = journal.Reader() + j.add_match('_EXE=/usr/bin/vim') + for entry in j: + print(entry['MESSAGE']) + + - Note: matches can be added from many different fields, for example entries from a specific process ID can be matched with the `_PID` field, and entries from a specific unit (ie. `journalctl -u systemd-udevd.service`) can be matched with `_SYSTEMD_UNIT`. See all fields available at the [systemd.journal-fields docs](https://www.freedesktop.org/software/systemd/man/systemd.journal-fields.html). + +Show kernel ring buffer (`journalctl -k`): + + from systemd import journal + j = journal.Reader() + j.add_match('_TRANSPORT=kernel') + for entry in j: + print(entry['MESSAGE']) + +Read entries in reverse (`journalctl _EXE=/usr/bin/vim -r`): + + from systemd import journal + class ReverseReader(journal.Reader): + def __next__(self): + ans = self.get_previous() + if ans: + return ans + raise StopIteration() + + j = ReverseReader() + j.add_match('_EXE=/usr/bin/vim') + j.seek_tail() + for entry in j: + print(entry['MESSAGE']) + + Notes ----- @@ -92,10 +162,10 @@ A handler class for the Python logging framework is also provided: import logging from systemd import journal logger = logging.getLogger('custom_logger_name') - logger.addHandler(journal.JournalHandler()) + logger.addHandler(journal.JournalHandler(SYSLOG_IDENTIFIER='custom_unit_name')) logger.warning("Some message: %s", 'detail') -libsytemd version compatibility +libsystemd version compatibility ------------------------------- This module may be compiled against any version of libsystemd. At |