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.TH QSGREP 1 "May 2023" "mod_qos utilities 11.74" "qsgrep man page"
.SH NAME
qsgrep \- prints matching patterns within a file.
.SH SYNOPSIS
qsgrep \-e <pattern> \-o <sub string> [<path>]
.SH DESCRIPTION
qsgrep is a simple tool to search patterns within files. It uses regular expressions to find patterns and prints the submatches within a pre\-defined format string.
.SH OPTIONS
.TP
\-e <pattern>
Specifies the search pattern.
.TP
\-o <string>
Defines the output string where $0\-$9 are substituted by the submatches of the regular expression.
.TP
<path>
Defines the input file to process. qsgrep reads from from standard input if this parameter is omitted.
.SH EXAMPLE
Shows the IP addresses of clients causing mod_qos(031) messages):
qsgrep \-e 'mod_qos\\(031\\).*, c=([a\-zA\-Z0\-9:.]*)' \-o 'ip=$1' error_log
.SH SEE ALSO
qsdt(1), qsexec(1), qsfilter2(1), qsgeo(1), qshead(1), qslog(1), qslogger(1), qspng(1), qsre(1), qsrespeed(1), qsrotate(1), qssign(1), qstail(1)
.SH AUTHOR
Pascal Buchbinder, http://mod-qos.sourceforge.net/
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