Added better option handling

1 files changed, 45 insertions, 0 deletions

diff --git a/src/args.c b/src/args.c
new file mode 100644
index 0000000..1600e0e
--- /dev/null
+++ b/src/args.c
@@ -0,0 +1,45 @@
+#include "tar.h"
+
+bool	args_parse(int argc, char **argv, t_args *args)
+{
+	int		opt;
+	int		action_counter = 0;
+
+	args->archive_name = NULL;
+	args->files = NULL;
+	while ((opt = getopt(argc, argv, "Acdtruxvf:")) != -1)
+	{
+		switch (opt)
+		{
+			case 'A': args->action = ACTION_CONCAT;  break;
+			case 'c': args->action = ACTION_CREATE;  break;
+			case 'd': args->action = ACTION_DIFF;    break;
+			case 't': args->action = ACTION_LIST;    break;
+			case 'r': args->action = ACTION_APPEND;  break;
+			case 'u': args->action = ACTION_UPDATE;  break;
+			case 'x': args->action = ACTION_EXTRACT; break;
+
+			case 'v': args->flags |= FLAG_VERBOSE; break;
+			case 'f':
+				args->flags |= FLAG_FILE;
+				args->archive_name = optarg;
+				break;
+			default:
+				return false;
+		}
+		if (strchr("Acdtrux", opt) != NULL)
+			action_counter++;
+	}
+	if (action_counter != 1)
+	{
+		fprintf(stderr, "%s: You way not specify more than one '-Acdtrux' option\n", argv[0]);
+		return false;
+	}
+	if (!(args->flags & FLAG_FILE) && isatty(STDOUT_FILENO))
+	{
+		fprintf(stderr, "%s: Refusing to write archive contents to terminal (missing -f option?)\n", argv[0]);
+		return false;
+	}
+	args->files = argv + optind;
+	return true;
+}