From: Rich Felker <dalias@aerifal.cx>
Date: Tue, 22 Oct 2019 14:22:22 +0000 (-0400)
Subject: fix errno for posix_openpt with no free ptys available
X-Git-Tag: v1.2.0~85
X-Git-Url: https://git.librecmc.org/?a=commitdiff_plain;h=4fd0f2056082441a4503f6bfcb787a7c15754518;p=oweals%2Fmusl.git

fix errno for posix_openpt with no free ptys available

linux fails the open with ENOSPC, but POSIX mandates EAGAIN.
---

diff --git a/src/misc/pty.c b/src/misc/pty.c
index b9cb5eaa..a0577147 100644
--- a/src/misc/pty.c
+++ b/src/misc/pty.c
@@ -7,7 +7,9 @@
 
 int posix_openpt(int flags)
 {
-	return open("/dev/ptmx", flags);
+	int r = open("/dev/ptmx", flags);
+	if (r < 0 && errno == ENOSPC) errno = EAGAIN;
+	return r;
 }
 
 int grantpt(int fd)