// Copyright (c) 2022 Slack Technologies, Inc. // Use of this source code is governed by the MIT license that can be // found in the LICENSE file. #include "shell/app/uv_stdio_fix.h" #include #include #include #include #include void FixStdioStreams() { // libuv may mark stdin/stdout/stderr as close-on-exec, which interferes // with chromium's subprocess spawning. As a workaround, we detect if these // streams are closed on startup, and reopen them as /dev/null if necessary. // Otherwise, an unrelated file descriptor will be assigned as stdout/stderr // which may cause various errors when attempting to write to them. // // For details see https://github.com/libuv/libuv/issues/2062 struct stat st; if (fstat(STDIN_FILENO, &st) < 0 && errno == EBADF) std::ignore = freopen("/dev/null", "r", stdin); if (fstat(STDOUT_FILENO, &st) < 0 && errno == EBADF) std::ignore = freopen("/dev/null", "w", stdout); if (fstat(STDERR_FILENO, &st) < 0 && errno == EBADF) std::ignore = freopen("/dev/null", "w", stderr); }