lsinitcpio: add -l, --list option; define as default

This is the default action for lsinitcpio. Add it just for the purpose
of clarity. This change also separates out true options from 'actions'
and validates that the user only passed a single action to lsinitcpio.
Update the manpage accordingly.

Signed-off-by: Dave Reisner <dreisner@archlinux.org>

1 files changed, 18 insertions, 5 deletions

diff --git a/lsinitcpio b/lsinitcpio
index 1d4a343..2dc7d35 100755
--- a/lsinitcpio
+++ b/lsinitcpio
@@ -14,15 +14,18 @@ declare FUNCTIONS=functions
 usage() {
     cat<<USAGE
 lsinitcpio %VERSION%
-usage: ${0##*/} [options] <initramfs>
+usage: ${0##*/} [action] [options] <initramfs>
 
-  Options:
+  Actions:
    -a, --analyze        analyze contents of image
    -c, --config         show configuration file image was built with
+   -l, --list           list contents of the image (default)
+   -x, --extract        extract image to disk
+
+  Options:
    -h, --help           display this help
    -n, --nocolor        disable colorized output
    -v, --verbose        more verbose output
-   -x, --extract        extract image to disk
 
 USAGE
 }
@@ -163,8 +166,8 @@ analyze_image() {
     fi
 }
 
-OPT_SHORT='achnvx'
-OPT_LONG=('analyze' 'help' 'nocolor' 'showconfig' 'verbose' 'extract')
+OPT_SHORT='achlnvx'
+OPT_LONG=('analyze' 'help' 'list' 'nocolor' 'showconfig' 'verbose' 'extract')
 
 if ! parseopts "$OPT_SHORT" "${OPT_LONG[@]}" -- "$@"; then
     exit 1
@@ -181,6 +184,8 @@ while :; do
         -h|--help)
             usage
             exit 0 ;;
+        -l|--list)
+            listcontents=1 ;;
         -n|--nocolor)
             color=0 ;;
         -v|--verbose)
@@ -219,6 +224,14 @@ readonly NC BOLD BLUE GREEN RED YELLOW
 [[ $image ]] || die "No image specified (use -h for help)"
 [[ -f $image ]] || die "No such file: $image"
 
+case $(( analyze + listcontents + showconfig )) in
+    0)
+        # default action when none specified
+        listcontents=1 ;;
+    [!1])
+        die "Only one action may be specified at a time" ;;
+esac
+
 # read compression type
 case "$(file -Lb "$image")" in
     @(data|LZMA)*) compress=lzma ;;