From e34e2bb3c703aa8c47d85ba4b4a86f6ae5dc0404 Mon Sep 17 00:00:00 2001
From: "Ned T. Crigler" <crigler@gmail.com>
Date: Thu, 19 Jun 2025 20:03:57 -0700
Subject: Handle partial reads of the execvp error string

It is possible that reading the entire error string requires multiple
read() calls.
---
 master.c | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/master.c b/master.c
index 75f4926..6d6d4d2 100644
--- a/master.c
+++ b/master.c
@@ -672,7 +672,12 @@ master_main(char **argv, int waitattach, int dontfork)
 		len = read(fd[0], buf, sizeof(buf));
 		if (len > 0)
 		{
-			write_buf_or_fail(2, buf, len);
+			do
+			{
+				write_buf_or_fail(2, buf, len);
+				len = read(fd[0], buf, sizeof(buf));
+			} while (len > 0);
+
 			kill(pid, SIGTERM);
 			return 1;
 		}
-- 
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