1 files changed, 34 insertions, 0 deletions
diff --git a/getpgrp.c b/getpgrp.c
new file mode 100644
index 0000000..f3e9c81
--- /dev/null
+++ b/getpgrp.c
@@ -0,0 +1,34 @@
+/* See LICENSE file for copyright and license details. */
+#include <errno.h>
+#include <stdint.h>
+#include <stdio.h>
+#include <string.h>
+#include <unistd.h>
+
+#include "arg.h"
+
+
+char *argv0;
+
+int
+main(int argc, char *argv[])
+{
+	ARGBEGIN {
+	default:
+		goto usage;
+	} ARGEND;
+	if (argc)
+		goto usage;
+
+	printf("%ji\n", (intmax_t)getpgrp());
+	if (fflush(stdout) || ferror(stdout) || fclose(stdout)) {
+		fprintf(stderr, "%s: printf: %s\n", argv0, strerror(errno));
+		return 1;
+	}
+
+	return 0;
+
+usage:
+	fprintf(stderr, "usage: %s\n", argv0);
+	return 1;
+}