From e2c57ad789285e99e1c9b75150065ecb134164c1 Mon Sep 17 00:00:00 2001
From: Pedro Falcato <pedro.falcato@gmail.com>
Date: Tue, 21 Feb 2023 23:22:11 +0000
Subject: [PATCH] Fix ttyname_r error return values

POSIX specifies ttyname_r should return errno and not do the usual
return errno = error, -1;

Fixes #732
---
 libc/unistd/ttyname_r.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/libc/unistd/ttyname_r.c b/libc/unistd/ttyname_r.c
index 8ae46737..768a6ca7 100644
--- a/libc/unistd/ttyname_r.c
+++ b/libc/unistd/ttyname_r.c
@@ -37,8 +37,8 @@ int ttyname_r(int fd, char* path, size_t path_size)
 	name[3] = 'v';
 	name[4] = '/';
 	if ( ioctl(fd, TIOCGNAME, name + 5) < 0 )
-		return -1;
+		return errno;
 	if ( path_size <= strlcpy(path, name, path_size) )
-		return errno = ERANGE, -1;
+		return ERANGE;
 	return 0;
 }