working (no history)

2 files changed, 53 insertions, 0 deletions

diff --git a/Makefile b/Makefile
new file mode 100644
index 0000000..6c6bc49
--- /dev/null
+++ b/Makefile
@@ -0,0 +1,4 @@
+CFLAGS = -Werror -Wall
+LDFLAGS = -lreadline -ltermcap
+
+repl: repl.c
diff --git a/repl.c b/repl.c
new file mode 100644
index 0000000..090b65d
--- /dev/null
+++ b/repl.c
@@ -0,0 +1,49 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <stdbool.h>
+#include <signal.h>
+#include <errno.h>
+#include <readline/readline.h>
+#include <readline/history.h>
+
+void handle_int(int sig) {
+	printf("\n");
+	rl_on_new_line();
+	rl_replace_line("", 0);
+	rl_redisplay(); /* thanks James Taylor on Stack Overflow */
+}
+
+int main(int argc, char *argv[]) {
+	if (argc != 2) {
+		fprintf(stderr, "usage: %s command\n", argv[0]);
+		return 1;
+	}
+
+	int size = strlen(argv[1]) + 3 + 1;
+	char *prompt = malloc(size);
+	snprintf(prompt, size, "%s > ", argv[1]);
+
+	struct sigaction act;
+	act.sa_handler = handle_int;
+	sigaction(SIGINT, &act, NULL);
+
+	rl_clear_signals();
+
+	while (true) {
+	    char *input = readline(prompt);
+
+		if (input == NULL) { /* ctrl-d */
+			printf("\n");
+			break;
+		}
+
+		int size = strlen(argv[1]) + 1 + strlen(input) + 1;
+		char *command = malloc(size);
+		snprintf(command, size, "%s %s", argv[1], input);
+
+		system(command);
+
+	    free(input);
+	}
+    return 0;
+}