grepc, grepc.1: Add optional FILE trailing arguments

Reported-by: наб <nabijaczleweli@nabijaczleweli.xyz>
Signed-off-by: Alejandro Colomar <alx.manpages@gmail.com>

2 files changed, 30 insertions, 6 deletions

diff --git a/bin/grepc b/bin/grepc
index 89cd84d..56a1914 100755
--- a/bin/grepc
+++ b/bin/grepc
@@ -4,11 +4,12 @@
 # Defaults:
 git='no';
 ext='\.[ch]$';
+FILES='.';
 
 
 grepc_usage()
 {
-	echo "Usage: $0 [OPTION ...] IDENTIFIER";
+	echo "Usage: $0 [OPTION ...] IDENTIFIER [FILE ...]";
 }
 
 
@@ -34,11 +35,16 @@ grepc_parse_cmd()
 	done;
 	shift $(($OPTIND-1));
 
-	if [ $# -ne 1 ]; then
+	if [ $# -lt 1 ]; then
 		grepc_usage >&2;
 		exit 1;
 	fi;
 	identifier=$1;
+	shift;
+
+	if [ $# -gt 0 ]; then
+		FILES=$@;
+	fi;
 }
 
 
@@ -47,9 +53,9 @@ grepc_find_files()
 	files="$(mktemp -t 'grepc.XXXXXX')";
 
 	if [ "$git" = 'yes' ]; then
-		git ls-files .;
+		git ls-files $FILES;
 	else
-		find . -type f;
+		find $FILES -type f;
 	fi \
 	| grep -P "$ext" \
 	| xargs grep -lPI "$1\b" \
diff --git a/share/man/man1/grepc.1 b/share/man/man1/grepc.1
index 6caaeb5..b8403f9 100644
--- a/share/man/man1/grepc.1
+++ b/share/man/man1/grepc.1
@@ -5,15 +5,33 @@ grepc \- find C declarations and definitions in source code
 .B grepc
 .RI [ option " ...]"
 .I identifier
+.RI [ file " ...]"
 .SH DESCRIPTION
 .MR grepc 1
-searches for all C declarations and definitions of
+searches for C declarations and definitions of
 .I identifier
-in all .c and .h files under the current working directory.
+in each
+.IR file .
+.PP
 .I identifier
 is normally a C identifier,
 but it is actually a PCRE pattern,
 so it can be used to find complex patterns.
+.PP
+If
+.I file
+is a directory,
+the search is recursive within that directory.
+If
+.I file
+doesn't match a certain extension, it is skipped
+(see
+.B \-x
+in OPTIONS).
+If no
+.I file
+is given,
+the working directory is searched.
 .SH OPTIONS
 .TP
 .B \-g