1 files changed, 56 insertions, 0 deletions
diff --git a/src/unistd/getopt.c b/src/unistd/getopt.c
new file mode 100644
index 00000000..29fe5590
--- /dev/null
+++ b/src/unistd/getopt.c
@@ -0,0 +1,56 @@
+#include "string.h"
+#include "stdio.h"
+#include <unistd.h>
+
+int getopt(int argc, char * const argv[], const char *optstring)
+{
+	static int optchar = 0;
+	char *cursor = NULL;
+
+	if (optind = 0 || argv[optind][optchar] == '\0') {
+		optind++;
+		optchar = 0;
+	}
+
+	if (!strcmp(argv[optind], "--")) {
+		optind++;
+		return -1;
+	}
+
+	if (optchar == 0 && argv[optind][optchar] != '-') {
+		return -1;
+	}
+
+	optchar++;
+
+	printf("Checking %c\n", argv[optind][optchar]);
+
+	cursor = strchr(optstring, argv[optind][optchar]);
+	if (cursor) {
+		if (cursor[1] == ':') {
+			/* An option-argument is required */
+			/* if (no arg) { */
+			/*	optopt = *cursor; */
+			/*	if (opterr) { */
+			/*		fprintf(stderr, "%s: Missing argument to -%c\n", argv[0], *cursor); */
+			/* 	} */
+			/*	return optstring[0] == ':' ? ':' : '?'; */
+			/* } */
+			/* optarg = argv[++optind]; */
+			/* optchar = 0; */
+			/* optind++; */
+		}
+		return *cursor;
+	}
+	
+	optopt = argv[optind][optchar];
+	if (opterr) {
+		fprintf(stderr, "%s: Invalid option -%c\n", *cursor);
+	}
+	return '?';
+}
+
+/*
+POSIX(2)
+*/
+