SAVELOG

Section: Maintenance Commands (8)
Updated: 24 August 1997
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NAME

savelog - save a log file

SYNOPSIS

savelog [-m mode] [-u user] [-g group] [-t] [-p] [-c cycle] [-l] file ...

DESCRIPTION

The savelog command saves and optionally compresses old copies of files. Older versions of file are named:

file.<number><compress_suffix>

where <number> is the version number, 0 being the newest. Version numbers > 0 are compressed unless -l prevents it. Version number 0 is not compressed becase a process might still have file opened for I/O. Only cycle versions of the file are kept.

If the file does not exist and -t was given, it will be created.

For files that do exist and have lengths greater than zero, the following actions are performed:

1)

Version numbered files are cycled. Version cycle-2 is moved to version cycle-1, version cycle-3 is moved to version cycle-2 , and so on. Finally version 0 is moved to version 1, and version cycle is deleted. Both compressed names and uncompressed names are cycled, regardless of -l. Missing version files are ignored.

2)

The new file.1 is compressed unless the -l flag was given. It is changed subject to the -m, -u, and -g flags.

3)

The main file is moved to file.0.

4)

If the -m, -u, -g, -t, or -p flags are given, then an empty file is created subject to the given flags. With the -p flag, the file is created with the same owner, group, and permissions as before.

5)

The new file.0 is changed subject to the -m, -u, and -g flags.

Since the version numbers start with 0, version number cycle is never formed. The cycle count must be at least 2.

OPTIONS

-m mode: chmod the log files to mode
-u user: chown log files to user
-g group: chgrp log files to group
-c cycle: Save cycle versions of the logfile (default: 7)
-t: touch new logfile into existence
-l: don't compress any log files (default: do compress)
-p: preserve owner, group, and permissions of logfile

BUGS

If a process is still writing to file.0, and savelog moves it to file.1 and compresses it, data could be lost.

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Time: 10:38:46 GMT, April 24, 2024