diff options
| -rw-r--r-- | ssh-agent-filter.C | 12 |
1 files changed, 7 insertions, 5 deletions
diff --git a/ssh-agent-filter.C b/ssh-agent-filter.C index 252e017..b806a85 100644 --- a/ssh-agent-filter.C +++ b/ssh-agent-filter.C @@ -602,11 +602,13 @@ int main (int const argc, char const * const * const argv) { // the following stuff is optional, so we don't do error checking setsid(); static_cast<void>(chdir("/")); - int devnull = open("/dev/null", O_RDWR); - dup2(devnull, 0); - dup2(devnull, 1); - dup2(devnull, 2); - close(devnull); + if (int devnull = open("/dev/null", O_RDWR); devnull != -1) { + dup2(devnull, 0); + dup2(devnull, 1); + dup2(devnull, 2); + if (devnull > 2) + close(devnull); + } } else { cout << "copy this to another terminal:" << endl; cout << "SSH_AUTH_SOCK='" << path.native() << "'; export SSH_AUTH_SOCK;" << endl; |