| Author: | Adrian Perez <[email protected]> |
|---|---|
| Manual section: | 8 |
dlog [options] [logfile]
The dlog program sends lines given as standard input to a log file,
one line at a time, optionally adding a timestamp in front of each line.
If the log file is not specified, then lines are printed back to standard
output. The latter may be useful to add timestamps in shell pipelines.
Command line options:
| -p TEXT, --prefix TEXT | |
| Insert the given text as prefix for each logged message. If adding timestamps is enabled, the text is inserted after the timestamp, but still before the logged text. | |
| -i NUMBER, --input-fd NUMBER | |
Use file descriptor NUMBER to read input. By default the
standard input descriptor (number 0) is used. | |
| -b, --buffered | Buffered operation. If enabled, calls to fsync(2) will be avoided. This improves performance, but may cause messages to be lost. |
| -t, --timestamp | |
Prepend a timestamp to each saved line. By default
timestamps are disabled. Timestamp format is
YYYY-mm-dd/HH:MM:SS. | |
| -e, --skip-empty | |
| Ignore empty input lines. An empty line is one that does not contain any characters; a line which contains whitespace is not considered empty. | |
| -h, --help | Show a summary of available options. |
Albeit it can be used stand-alone, most of the time you will be running
dlog under a process control tool like dmon(8) or supervise(8).
Additional options will be picked from the DLOG_OPTIONS environment
variable, if defined. Any command line option can be specified this way.
Arguments read from the environment variable will be prepended to the ones
given in the command line, so they may still be overriden.
dmon(8), dslog(8), rotlog(8), multilog(8), supervise(8)