NAME

rsub —

substitute lines in a file or append if not found

SYNOPSIS

rsub [-A] -r line_regex -l line_text target

rsub target < block_content

DESCRIPTION

rsub is shipped to remote machines by rset(1) to provide a standard method of modifying configuration parameters within a file. Two modes of operation are supported: line substitution and block replacement.

line replacements are defined by the flags -r and -l, while the content for a text block is provided on STDIN.

The arguments for line subsitution are as follows:

-A: Append line if the pattern is not found.
-r: A regular expression matching the line to replace.
-l: The replacement text for a matching line. Newlines are not permitted as part of the replacement string.

ENVIRONMENT

When updating a block of text, RSUB_START and RSUB_END define the beginning and ending markers.

EXIT STATUS

The rsub utility exits with one of the following values:

0: Target file was updated
1: No changes were made, or an error occurred
2: Incorrect parameters
3: File not found

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SEE ALSO