From 18425501da3ad57fcf78eb111cf62ca4d79c3f5f Mon Sep 17 00:00:00 2001
From: Jakob Kaivo <jkk@ung.org>
Date: Fri, 15 Mar 2019 12:16:24 -0400
Subject: rough out

---
 wait.c | 37 +++++++++++++++++++++++++++++++++----
 1 file changed, 33 insertions(+), 4 deletions(-)

diff --git a/wait.c b/wait.c
index 16b64d7..d4a224b 100644
--- a/wait.c
+++ b/wait.c
@@ -1,8 +1,37 @@
+#define _XOPEN_SOURCE 700
 #include <stdio.h>
+#include <sys/wait.h>
+#include <unistd.h>
 
-int
-wait_main(int argc, char **argv)
+#include "jobcontrol.h"
+
+int wait_main(int argc, char *argv[])
 {
-	printf("Sorry, %s isn't implemented yet.\n", argv[0]);
-	return argc;
+	int c;
+	while ((c = getopt(argc, argv, "")) != -1) {
+		return 1;
+	}
+
+	if (optind >= argc) {
+		/* wait for all children */
+		return 0;
+	}
+
+	int ret = 0;
+	do {
+		pid_t pid = pidfrom(argv[optind++]);
+		pid = waitpid(pid, &ret, 0);
+
+		if (pid == -1) {
+			ret = 127;
+		} else if (WIFEXITED(ret)) {
+			ret = WEXITSTATUS(ret);
+		} else if (WIFSIGNALED(ret)) {
+			ret = 128; /* + something */
+		} else {
+			ret = 126;
+		}
+	} while (argv[optind]);
+
+	return 0;
 }
-- 
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