Implement '!' shell commands

2 files changed, 9 insertions, 5 deletions

diff --git a/repl.1 b/repl.1
index 15c848d..1c704cc 100644
--- a/repl.1
+++ b/repl.1
@@ -28,6 +28,10 @@ Built on GNU readline,
 .Nm
 supports history and Emacs key bindings.
 
+Like in many other line-based UNIX interfaces,
+you can execute a shell command without a prefix
+by adding an exclamation mark before it.
+
 .Nm repl
 is useful for command-line interfaces built on a 
 .Dq prefix command
diff --git a/repl.c b/repl.c
index 3794a17..1f439b1 100644
--- a/repl.c
+++ b/repl.c
@@ -33,7 +33,7 @@ int main(int argc, char *argv[]) {
 	int size = strlen(argv[argc-1]) + 3 + 1;
 	char *prompt = malloc(size);
 	if (prompt == NULL) err(1, NULL);
-	snprintf(prompt, size, "%s > ", argv[argc-1]);
+	snprintf(prompt, size, "%s& ", argv[argc-1]);
 
 	struct sigaction act = {0};
 	act.sa_handler = handle_int;
@@ -44,17 +44,17 @@ int main(int argc, char *argv[]) {
 	while (true) {
 		char *input = readline(prompt);
 
-		if (input == NULL) { /* ctrl-d */
-			printf("\n");
+		if (input == NULL) /* ctrl-d */
 			break;
-		}
 		
 		if (input[0] != '\0') add_history(input);
 
 		int size = strlen(argv[argc-1]) + 1 + strlen(input) + 1;
 		char *command = malloc(size);
 		if (command == NULL) err(1, NULL);
-		if (append)
+		if (input[0] == '!')
+			snprintf(command, size, "%s", input + 1);
+		else if (append)
 			snprintf(command, size, "%s %s", input, argv[argc-1]);
 		else
 			snprintf(command, size, "%s %s", argv[argc-1], input);