From 1d00f6a1717826999472f9f7192e7372f34f5e99 Mon Sep 17 00:00:00 2001
From: Jakob Kaivo <jkk@ung.org>
Date: Tue, 6 Aug 2019 09:11:23 -0400
Subject: bring in line with nice and env

---
 nohup.c | 74 ++++++++++++++++++++++++++++++++++++++++-------------------------
 1 file changed, 46 insertions(+), 28 deletions(-)

diff --git a/nohup.c b/nohup.c
index 7132340..e42a842 100644
--- a/nohup.c
+++ b/nohup.c
@@ -1,51 +1,74 @@
-#define _XOPEN_SOURCE 700
+/*
+ * UNG's Not GNU
+ *
+ * Copyright (c) 2011-2019, Jakob Kaivo <jkk@ung.org>
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+#define _XOPEN_SOURCE 500
 #include <errno.h>
 #include <fcntl.h>
 #include <locale.h>
 #include <signal.h>
 #include <stdio.h>
 #include <stdlib.h>
+#include <string.h>
 #include <unistd.h>
 
-#define NOHUP_UTILITY_NOT_FOUND		127
-#define NOHUP_UTILITY_NOT_INVOKED	126
+#define UTILITY_NOT_INVOKED	(126)
+#define UTILITY_NOT_FOUND	(127)
 
 int main(int argc, char *argv[])
 {
-	int c;
-
 	setlocale(LC_ALL, "");
 
-	while ((c = getopt(argc, argv, "")) != -1) {
-		switch (c) {
-		default:
-			return 1;
-		}
+	while (getopt(argc, argv, "") != -1) {
+		return 1;
 	}
 
-	argv += optind;
-
-	if (argv[0] == NULL) {
-		fprintf(stderr, "nohup: utility required\n");
-		return NOHUP_UTILITY_NOT_INVOKED;
+	if (optind >= argc) {
+		fprintf(stderr, "nohup: missing operand\n");
+		return UTILITY_NOT_INVOKED;
 	}
 
 	signal(SIGHUP, SIG_IGN);
 
 	if (isatty(STDOUT_FILENO)) {
 		char out[FILENAME_MAX] = "nohup.out";
-		int fd = open(out, O_WRONLY | O_CREAT | O_APPEND, S_IRUSR | S_IWUSR);
+		int fd = open(out, O_WRONLY | O_CREAT | O_APPEND,
+			S_IRUSR | S_IWUSR);
+
 		if (fd == -1) {
 			char *home = getenv("HOME");
 			if (home == NULL) {
 				fprintf(stderr, "nohup: $HOME unset\n");
-				return NOHUP_UTILITY_NOT_INVOKED;
+				return UTILITY_NOT_INVOKED;
 			}
+
 			snprintf(out, sizeof(out), "%s/nohup.out", home);
-			fd = open(out, O_WRONLY | O_CREAT | O_APPEND, S_IRUSR | S_IWUSR);
+			fd = open(out, O_WRONLY | O_CREAT | O_APPEND,
+				S_IRUSR | S_IWUSR);
+
 			if (fd == -1) {
-				perror("nohup: couldn't open nohup.out or $HOME/nohup.out");
-				return NOHUP_UTILITY_NOT_INVOKED;
+				perror("nohup: nohup.out or $HOME/nohup.out");
+				return UTILITY_NOT_INVOKED;
 			}
 		}
 
@@ -57,13 +80,8 @@ int main(int argc, char *argv[])
 		dup2(STDOUT_FILENO, STDERR_FILENO);
 	}
 
-	execvp(argv[0], argv);
-
-	perror("nohup");
-
-	if (errno == ENOENT) {
-		return NOHUP_UTILITY_NOT_FOUND;
-	}
+	execvp(argv[optind], argv + optind);
 
-	return NOHUP_UTILITY_NOT_INVOKED;
+	fprintf(stderr, "nohup: %s: %s\n", argv[optind], strerror(errno));
+	return errno == ENOENT ? UTILITY_NOT_FOUND : UTILITY_NOT_INVOKED;
 }
-- 
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