From dbceb52424b0bcadb7775fa68e587203683b8364 Mon Sep 17 00:00:00 2001
From: Jakob Kaivo <jkk@ung.org>
Date: Sat, 15 May 2021 21:04:25 -0400
Subject: copy source permission bits

---
 cp.c | 18 ++++++++++++++++--
 1 file changed, 16 insertions(+), 2 deletions(-)

diff --git a/cp.c b/cp.c
index c852daa..f444e0e 100644
--- a/cp.c
+++ b/cp.c
@@ -18,6 +18,7 @@
  */
 
 #define _XOPEN_SOURCE 700
+#include <fcntl.h>
 #include <errno.h>
 #include <stdbool.h>
 #include <stdio.h>
@@ -70,9 +71,21 @@ static int cp(char *src, const char *target, enum flags flags)
 		}
 	}
 
-	FILE *out = fopen(targetpath, "wb");
+	if (fstat(fileno(in), &st) != 0) {
+		perror("fstat");
+		return 1;
+	}
+
+	int ofd = open(targetpath, O_WRONLY | O_CREAT, st.st_mode);
+	if (ofd == -1) {
+		perror("open");
+		return 1;
+	}
+
+	FILE *out = fdopen(ofd, "wb");
 	if (out == NULL) {
-		fprintf(stderr, "cp: Couldn't open %s: %s\n", targetpath, strerror(errno));
+		fprintf(stderr, "cp: Couldn't open %s: %s\n", targetpath,
+			strerror(errno));
 		return 1;
 	}
 
@@ -83,6 +96,7 @@ static int cp(char *src, const char *target, enum flags flags)
 
 	fclose(in);
 	fclose(out);
+	close(ofd);
 
 	return 0;
 }
-- 
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