user/libc: port skeeto's getopt

1 files changed, 21 insertions, 0 deletions

diff --git a/src/user/lib/vendor/getopt/getopt.h b/src/user/lib/vendor/getopt/getopt.h
new file mode 100644
index 0000000..4cb075c
--- /dev/null
+++ b/src/user/lib/vendor/getopt/getopt.h
@@ -0,0 +1,21 @@
+/* Adapted from https://github.com/skeeto/getopt by Chris Wellons */
+
+/* A minimal POSIX getopt() implementation in ANSI C
+ *
+ * This is free and unencumbered software released into the public domain.
+ *
+ * This implementation supports the convention of resetting the option
+ * parser by assigning optind to 0. This resets the internal state
+ * appropriately.
+ *
+ * Ref: http://pubs.opengroup.org/onlinepubs/9699919799/functions/getopt.html
+ */
+#ifndef GETOPT_H
+#define GETOPT_H
+
+extern int optind, opterr, optopt;
+extern char *optarg;
+
+int getopt(int argc, char * const argv[], const char *optstring);
+
+#endif