close(fd[1]);
}
+#ifndef WIN32
static inline void dup_devnull(int to)
{
int fd = open("/dev/null", O_RDWR);
dup2(fd, to);
close(fd);
}
+#endif
int start_command(struct child_process *cmd)
{
int need_in, need_out, need_err;
int fdin[2], fdout[2], fderr[2];
- int failed_errno;
+ int failed_errno = failed_errno;
/*
* In case of errors we must keep the promise to close FDs
trace_argv_printf(cmd->argv, "trace: run_command:");
-#ifndef __MINGW32__
+#ifndef WIN32
fflush(NULL);
cmd->pid = fork();
if (!cmd->pid) {
}
if (cmd->dir && chdir(cmd->dir))
- die("exec %s: cd to %s failed (%s)", cmd->argv[0],
- cmd->dir, strerror(errno));
+ die_errno("exec '%s': cd to '%s' failed", cmd->argv[0],
+ cmd->dir);
if (cmd->env) {
for (; *cmd->env; cmd->env++) {
if (strchr(*cmd->env, '='))
error("cannot fork() for %s: %s", cmd->argv[0],
strerror(failed_errno = errno));
#else
- int s0 = -1, s1 = -1, s2 = -1; /* backups of stdin, stdout, stderr */
+{
+ int fhin = 0, fhout = 1, fherr = 2;
const char **sargv = cmd->argv;
char **env = environ;
- if (cmd->no_stdin) {
- s0 = dup(0);
- dup_devnull(0);
- } else if (need_in) {
- s0 = dup(0);
- dup2(fdin[0], 0);
- } else if (cmd->in) {
- s0 = dup(0);
- dup2(cmd->in, 0);
- }
-
- if (cmd->no_stderr) {
- s2 = dup(2);
- dup_devnull(2);
- } else if (need_err) {
- s2 = dup(2);
- dup2(fderr[1], 2);
- }
-
- if (cmd->no_stdout) {
- s1 = dup(1);
- dup_devnull(1);
- } else if (cmd->stdout_to_stderr) {
- s1 = dup(1);
- dup2(2, 1);
- } else if (need_out) {
- s1 = dup(1);
- dup2(fdout[1], 1);
- } else if (cmd->out > 1) {
- s1 = dup(1);
- dup2(cmd->out, 1);
- }
+ if (cmd->no_stdin)
+ fhin = open("/dev/null", O_RDWR);
+ else if (need_in)
+ fhin = dup(fdin[0]);
+ else if (cmd->in)
+ fhin = dup(cmd->in);
+
+ if (cmd->no_stderr)
+ fherr = open("/dev/null", O_RDWR);
+ else if (need_err)
+ fherr = dup(fderr[1]);
+
+ if (cmd->no_stdout)
+ fhout = open("/dev/null", O_RDWR);
+ else if (cmd->stdout_to_stderr)
+ fhout = dup(fherr);
+ else if (need_out)
+ fhout = dup(fdout[1]);
+ else if (cmd->out > 1)
+ fhout = dup(cmd->out);
if (cmd->dir)
die("chdir in start_command() not implemented");
- if (cmd->env) {
- env = copy_environ();
- for (; *cmd->env; cmd->env++)
- env = env_setenv(env, *cmd->env);
- }
+ if (cmd->env)
+ env = make_augmented_environ(cmd->env);
if (cmd->git_cmd) {
cmd->argv = prepare_git_cmd(cmd->argv);
}
- cmd->pid = mingw_spawnvpe(cmd->argv[0], cmd->argv, env);
+ cmd->pid = mingw_spawnvpe(cmd->argv[0], cmd->argv, env,
+ fhin, fhout, fherr);
failed_errno = errno;
- if (cmd->pid < 0 && errno != ENOENT)
+ if (cmd->pid < 0 && (!cmd->silent_exec_failure || errno != ENOENT))
error("cannot spawn %s: %s", cmd->argv[0], strerror(errno));
if (cmd->env)
free(cmd->argv);
cmd->argv = sargv;
- if (s0 >= 0)
- dup2(s0, 0), close(s0);
- if (s1 >= 0)
- dup2(s1, 1), close(s1);
- if (s2 >= 0)
- dup2(s2, 2), close(s2);
+ if (fhin != 0)
+ close(fhin);
+ if (fhout != 1)
+ close(fhout);
+ if (fherr != 2)
+ close(fherr);
+}
#endif
if (cmd->pid < 0) {
return 0;
}
-static int wait_or_whine(pid_t pid, const char *argv0)
+static int wait_or_whine(pid_t pid, const char *argv0, int silent_exec_failure)
{
int status, code = -1;
pid_t waiting;
} else if (waiting != pid) {
error("waitpid is confused (%s)", argv0);
} else if (WIFSIGNALED(status)) {
- error("%s died of signal", argv0);
+ code = WTERMSIG(status);
+ error("%s died of signal %d", argv0, code);
+ /*
+ * This return value is chosen so that code & 0xff
+ * mimics the exit code that a POSIX shell would report for
+ * a program that died from this signal.
+ */
+ code -= 128;
} else if (WIFEXITED(status)) {
code = WEXITSTATUS(status);
/*
if (code == 127) {
code = -1;
failed_errno = ENOENT;
+ if (!silent_exec_failure)
+ error("cannot run %s: %s", argv0,
+ strerror(ENOENT));
}
} else {
error("waitpid is confused (%s)", argv0);
int finish_command(struct child_process *cmd)
{
- return wait_or_whine(cmd->pid, cmd->argv[0]);
+ return wait_or_whine(cmd->pid, cmd->argv[0], cmd->silent_exec_failure);
}
int run_command(struct child_process *cmd)
cmd->no_stdin = opt & RUN_COMMAND_NO_STDIN ? 1 : 0;
cmd->git_cmd = opt & RUN_GIT_CMD ? 1 : 0;
cmd->stdout_to_stderr = opt & RUN_COMMAND_STDOUT_TO_STDERR ? 1 : 0;
+ cmd->silent_exec_failure = opt & RUN_SILENT_EXEC_FAILURE ? 1 : 0;
}
int run_command_v_opt(const char **argv, int opt)
return run_command(&cmd);
}
-#ifdef __MINGW32__
-static __stdcall unsigned run_thread(void *data)
+#ifdef WIN32
+static unsigned __stdcall run_thread(void *data)
{
struct async *async = data;
return async->proc(async->fd_for_proc, async->data);
return error("cannot create pipe: %s", strerror(errno));
async->out = pipe_out[0];
-#ifndef __MINGW32__
+#ifndef WIN32
/* Flush stdio before fork() to avoid cloning buffers */
fflush(NULL);
int finish_async(struct async *async)
{
-#ifndef __MINGW32__
- int ret = wait_or_whine(async->pid, "child process");
+#ifndef WIN32
+ int ret = wait_or_whine(async->pid, "child process", 0);
#else
DWORD ret = 0;
if (WaitForSingleObject(async->tid, INFINITE) != WAIT_OBJECT_0)