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Handle SIGCHLD signals when piping

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This commit is contained in:
Maxime Coste 2014-12-02 18:59:39 +00:00
parent 798d4c3a1e
commit 8208e75294
1 changed files with 11 additions and 1 deletions
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12
src/shell_manager.cc
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@ -50,6 +50,10 @@ String ShellManager::pipe(StringView input,
::pipe(read_pipe);
::pipe(error_pipe);
static sig_atomic_t exited; exited = 0;
static sig_atomic_t sig_exit_status;
signal(SIGCHLD, [](int) { wait(&sig_exit_status); exited = 1; });
String output;
if (pid_t pid = fork())
{
@ -89,7 +93,13 @@ String ShellManager::pipe(StringView input,
if (not error.empty())
write_debug("shell stderr: <<<\n" + error + ">>>");
waitpid(pid, exit_status, 0);
signal(SIGCHLD, SIG_DFL);
if (not exited)
waitpid(pid, exit_status, 0);
else if (exit_status)
*exit_status = sig_exit_status;
if (exit_status)
{
if (WIFEXITED(*exit_status))