From fbc6c68f3d3955791791bd46d423839113a62b57 Mon Sep 17 00:00:00 2001
From: Mahmoud Al-Qudsi <mqudsi@neosmart.net>
Date: Thu, 8 Feb 2018 17:05:13 -0600
Subject: [PATCH] Handle error opening /dev/null in `redirect_tty_output`

This fixes coverity scan defect number 7520299
---
 src/common.cpp | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/common.cpp b/src/common.cpp
index 4c88ca4fc..98fc57238 100644
--- a/src/common.cpp
+++ b/src/common.cpp
@@ -2091,6 +2091,9 @@ bool fish_reserved_codepoint(wchar_t c) {
 void redirect_tty_output() {
     struct termios t;
     int fd = open("/dev/null", O_WRONLY);
+    if (fd == -1) {
+        __fish_assert("Could not open /dev/null!", __FILE__, __LINE__, errno);
+    }
     if (tcgetattr(STDIN_FILENO, &t) == -1 && errno == EIO) dup2(fd, STDIN_FILENO);
     if (tcgetattr(STDOUT_FILENO, &t) == -1 && errno == EIO) dup2(fd, STDOUT_FILENO);
     if (tcgetattr(STDERR_FILENO, &t) == -1 && errno == EIO) dup2(fd, STDERR_FILENO);