Begin work on the Ahoy emulator

1 files changed, 57 insertions, 0 deletions

diff --git a/src/ahoy/main.c b/src/ahoy/main.c
new file mode 100644
index 0000000..8cc7106
--- /dev/null
+++ b/src/ahoy/main.c
@@ -0,0 +1,57 @@
+#include <fcntl.h>
+#include <getopt.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+
+#include "cerr.h"
+#include "macros.h"
+
+static void run(int, const char *);
+
+int
+main(int argc, char **argv)
+{
+	int opt;
+	const struct option longopts[] = {
+		{"help",  no_argument, nullptr, 'h'},
+		{nullptr, no_argument, nullptr, 0  },
+	};
+
+	cerrinit(*argv);
+	while ((opt = getopt_long(argc, argv, "h", longopts, nullptr)) != -1) {
+		switch (opt) {
+		case 'h':
+			execlp("man", "man", "1", argv[0], nullptr);
+			die("execlp: man 1 %s", argv[0]);
+		default:
+			fprintf(stderr, "Usage: %s [file ...]\n", argv[0]);
+			exit(EXIT_FAILURE);
+		}
+	}
+
+	argc -= optind;
+	argv += optind;
+
+	if (!argc)
+		run(STDIN_FILENO, "-");
+	for (int i = 0; i < argc; i++) {
+		if (streq("-", argv[i]))
+			run(STDIN_FILENO, "-");
+		else {
+			int fd;
+			if ((fd = open(argv[i], O_RDONLY)) == -1)
+				die("open: %s", argv[i]);
+			run(fd, argv[i]);
+			close(fd);
+		}
+	}
+
+	return EXIT_SUCCESS;
+}
+
+void
+run([[maybe_unused]] int fd, [[maybe_unused]] const char *fn)
+{
+}