Add setopt

1 files changed, 55 insertions, 0 deletions

diff --git a/bin/setopt.c b/bin/setopt.c
new file mode 100644
index 00000000..75197f51
--- /dev/null
+++ b/bin/setopt.c
@@ -0,0 +1,55 @@
+/* Copyright (C) 2019  C. McEnroe <june@causal.agency>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sysexits.h>
+#include <unistd.h>
+
+static void printArg(const char *str) {
+	printf(" ");
+	if (!str[0]) {
+		printf("''");
+		return;
+	}
+	while (str[0]) {
+		size_t sq = strcspn(str, "'");
+		if (sq) {
+			printf("'%.*s'", (int)sq, str);
+		} else {
+			printf("\"'\"");
+			sq++;
+		}
+		str = &str[sq];
+	}
+}
+
+int main(int argc, char *argv[]) {
+	if (argc < 2) return EX_USAGE;
+	int opt;
+	optind = 2;
+	while (0 < (optarg = NULL, opt = getopt(argc, argv, argv[1]))) {
+		if (opt == '?') return EX_USAGE;
+		printf(" -%c", opt);
+		if (optarg) printArg(optarg);
+	}
+	printf(" --");
+	for (; optind < argc; ++optind) {
+		printArg(argv[optind]);
+	}
+	printf("\n");
+}