support option -q (quiet)

CHANGELOG.md

@@ -4,6 +4,7 @@
 #### next (January 2020)
 
  - Set safe working directory access mode
+ - Support option `-q` (quiet)'
 
 #### v2.2.1 (January 2020)
 

README.md

@@ -8,7 +8,7 @@
 
 Version 2.2.1, January 2020
 
-<pre><code><b>walk</b> [<b>-cyA</b>] [<b>--</b>] <i>ARCHIVE</i></code></pre>
+<pre><code><b>walk</b> [<b>-cyAq</b>] [<b>--</b>] <i>ARCHIVE</i></code></pre>
 
 # Description
 
@@ -98,6 +98,10 @@ These extensions are recognized:
   can cause the current directory's owner and/or mode to be changed
   by the archiver program,
   so use this option with caution.
+* **-q**  
+  Quiet mode;
+  suppresses most archiver output
+  such as filenames that are being extracted/compressed.
 
 # Notes
 

doc/walk.1

@@ -3,7 +3,7 @@
 walk \- enter and manipulate archive files like directories
 .SH SYNOPSIS
 \fBwalk\fR
-[\fB-cyA\fR]
+[\fB-cyAq\fR]
 [\fB--\fR]
 \fIARCHIVE\fR
 .SH DESCRIPTION
@@ -87,6 +87,11 @@ Unpacking archives which contain the \fB.\fR directory entry
 can cause the current directory's owner and/or mode to be changed
 by the archiver program,
 so use this option with caution.
+.TP
+.B \-q
+Quiet mode;
+suppresses most archiver output
+such as filenames that are being extracted/compressed.
 .SH NOTES
 Beware that some archive types have their own idiosyncracies
 concerning file ownership:

src/walk.sh

@@ -104,7 +104,7 @@ expect () {
 	esac
 }
 
-syntaxline="syntax: $prog [-cyA] ARCHIVE "
+syntaxline="syntax: $prog [-cyAq] ARCHIVE "
 help () {
 	printf '%s\n' "$syntaxline"
 	echo ""
@@ -136,10 +136,11 @@ read_arguments () {
 		[ "$arg" = "--"     ] && break
 	done
 
-	while getopts 'cyAh' opt; do case "$opt" in
+	while getopts 'cyAqh' opt; do case "$opt" in
 		c)	create_empty=yes ;;
 		y)	force_answer=yes ;;
 		A)	pack_root=yes ;;
+		q)	quiet=yes ;;
 		h)	help ;;
 		--)	;;
 		*)	exit $EXIT_SYNTAX ;;