Make entries in the system log (POSIX)
Note:
If you aren't root, specify the full path: /usr/sbin/logger.
Syntax:
logger [-is] [-f file] [-p pri] [-t tag]
[string ...]
Options:
- -f file
- (QNX Neutrino extension) Log the specified file.
- -i
- (QNX Neutrino extension) Log the process ID of the logger process with each line.
- -p pri
- (QNX Neutrino extension) Enter the message with the specified priority.
The priority may be specified numerically or as a
facility.level pair.
For example, -p local3.info logs the message(s) as informational
level in the local3 facility. The default is user.notice.
- -s
- (QNX Neutrino extension) Log the message to standard error, as well as the system log.
- -t tag
- (QNX Neutrino extension) Mark every line in the log with the specified tag.
The default is the current user ID.
- string...
- Write the string arguments to the log, separated by a single space; if not specified, and the
-f flag isn't provided, standard input is logged.
Description:
The logger command provides a shell command interface to the
syslogd
daemon.
Examples:
Log the message “System rebooted”:
logger System rebooted
Log the contents of the file /tmp/log, tagging each line with log:
logger -f /tmp/log -t log
Files:
- /usr/sbin/logger
- The logger utility is located in the /usr/sbin/
directory, which is not included in the default PATH of non-root users.
If you aren't root, specify the full path.
Environment variables:
- SYSLOG
- When defined, SYSLOG specifies which node syslogd is running on.
By default, the local node is assumed.
Exit status:
- 0
- Successful completion.
- >0
- An error occurred.
Note:
Because the
syslog()
API doesn't return error codes, only argument errors can be detected.