static void notify_parent(void)
{
- write(child_notifier, "", 1);
+ ssize_t unused;
+ unused = write(child_notifier, "", 1);
}
static NORETURN void die_child(const char *err, va_list params)
{
char msg[4096];
+ ssize_t unused;
int len = vsnprintf(msg, sizeof(msg), err, params);
if (len > sizeof(msg))
len = sizeof(msg);
- write(child_err, "fatal: ", 7);
- write(child_err, msg, len);
- write(child_err, "\n", 1);
+ unused = write(child_err, "fatal: ", 7);
+ unused = write(child_err, msg, len);
+ unused = write(child_err, "\n", 1);
exit(128);
}
else if (need_err) {
dup2(fderr[1], 2);
close_pair(fderr);
+ } else if (cmd->err > 1) {
+ dup2(cmd->err, 2);
+ close(cmd->err);
}
if (cmd->no_stdout)
fherr = open("/dev/null", O_RDWR);
else if (need_err)
fherr = dup(fderr[1]);
+ else if (cmd->err > 2)
+ fherr = dup(cmd->err);
if (cmd->no_stdout)
fhout = open("/dev/null", O_RDWR);
else if (cmd->out > 1)
fhout = dup(cmd->out);
- if (cmd->dir)
- die("chdir in start_command() not implemented");
if (cmd->env)
env = make_augmented_environ(cmd->env);
cmd->argv = prepare_shell_cmd(cmd->argv);
}
- cmd->pid = mingw_spawnvpe(cmd->argv[0], cmd->argv, env,
+ cmd->pid = mingw_spawnvpe(cmd->argv[0], cmd->argv, env, cmd->dir,
fhin, fhout, fherr);
failed_errno = errno;
if (cmd->pid < 0 && (!cmd->silent_exec_failure || errno != ENOENT))
close(cmd->out);
if (need_err)
close_pair(fderr);
+ else if (cmd->err)
+ close(cmd->err);
errno = failed_errno;
return -1;
}
if (need_err)
close(fderr[1]);
+ else if (cmd->err)
+ close(cmd->err);
return 0;
}
static unsigned __stdcall run_thread(void *data)
{
struct async *async = data;
- return async->proc(async->fd_for_proc, async->data);
+ return async->proc(async->proc_in, async->proc_out, async->data);
}
#endif
int start_async(struct async *async)
{
- int pipe_out[2];
+ int need_in, need_out;
+ int fdin[2], fdout[2];
+ int proc_in, proc_out;
- if (pipe(pipe_out) < 0)
- return error("cannot create pipe: %s", strerror(errno));
- async->out = pipe_out[0];
+ need_in = async->in < 0;
+ if (need_in) {
+ if (pipe(fdin) < 0) {
+ if (async->out > 0)
+ close(async->out);
+ return error("cannot create pipe: %s", strerror(errno));
+ }
+ async->in = fdin[1];
+ }
+
+ need_out = async->out < 0;
+ if (need_out) {
+ if (pipe(fdout) < 0) {
+ if (need_in)
+ close_pair(fdin);
+ else if (async->in)
+ close(async->in);
+ return error("cannot create pipe: %s", strerror(errno));
+ }
+ async->out = fdout[0];
+ }
+
+ if (need_in)
+ proc_in = fdin[0];
+ else if (async->in)
+ proc_in = async->in;
+ else
+ proc_in = -1;
+
+ if (need_out)
+ proc_out = fdout[1];
+ else if (async->out)
+ proc_out = async->out;
+ else
+ proc_out = -1;
#ifndef WIN32
/* Flush stdio before fork() to avoid cloning buffers */
async->pid = fork();
if (async->pid < 0) {
error("fork (async) failed: %s", strerror(errno));
- close_pair(pipe_out);
- return -1;
+ goto error;
}
if (!async->pid) {
- close(pipe_out[0]);
- exit(!!async->proc(pipe_out[1], async->data));
+ if (need_in)
+ close(fdin[1]);
+ if (need_out)
+ close(fdout[0]);
+ exit(!!async->proc(proc_in, proc_out, async->data));
}
- close(pipe_out[1]);
+
+ if (need_in)
+ close(fdin[0]);
+ else if (async->in)
+ close(async->in);
+
+ if (need_out)
+ close(fdout[1]);
+ else if (async->out)
+ close(async->out);
#else
- async->fd_for_proc = pipe_out[1];
+ async->proc_in = proc_in;
+ async->proc_out = proc_out;
async->tid = (HANDLE) _beginthreadex(NULL, 0, run_thread, async, 0, NULL);
if (!async->tid) {
error("cannot create thread: %s", strerror(errno));
- close_pair(pipe_out);
- return -1;
+ goto error;
}
#endif
return 0;
+
+error:
+ if (need_in)
+ close_pair(fdin);
+ else if (async->in)
+ close(async->in);
+
+ if (need_out)
+ close_pair(fdout);
+ else if (async->out)
+ close(async->out);
+ return -1;
}
int finish_async(struct async *async)