2 #include "run-command.h"
5 static inline void close_pair(int fd
[2])
11 static inline void dup_devnull(int to
)
13 int fd
= open("/dev/null", O_RDWR
);
18 int start_command(struct child_process
*cmd
)
20 int need_in
, need_out
, need_err
;
21 int fdin
[2], fdout
[2], fderr
[2];
23 need_in
= !cmd
->no_stdin
&& cmd
->in
< 0;
26 return -ERR_RUN_COMMAND_PIPE
;
31 need_out
= !cmd
->no_stdout
32 && !cmd
->stdout_to_stderr
35 if (pipe(fdout
) < 0) {
38 return -ERR_RUN_COMMAND_PIPE
;
44 need_err
= !cmd
->no_stderr
&& cmd
->err
< 0;
46 if (pipe(fderr
) < 0) {
51 return -ERR_RUN_COMMAND_PIPE
;
71 else if (cmd
->stdout_to_stderr
)
76 } else if (cmd
->out
> 1) {
88 if (cmd
->dir
&& chdir(cmd
->dir
))
89 die("exec %s: cd to %s failed (%s)", cmd
->argv
[0],
90 cmd
->dir
, strerror(errno
));
92 for (; *cmd
->env
; cmd
->env
++) {
93 if (strchr(*cmd
->env
, '='))
94 putenv((char*)*cmd
->env
);
100 execv_git_cmd(cmd
->argv
);
102 execvp(cmd
->argv
[0], (char *const*) cmd
->argv
);
104 die("exec %s failed.", cmd
->argv
[0]);
107 int s0
= -1, s1
= -1, s2
= -1; /* backups of stdin, stdout, stderr */
108 const char *sargv0
= cmd
->argv
[0];
109 char **env
= environ
;
110 struct strbuf git_cmd
;
115 } else if (need_in
) {
118 } else if (cmd
->in
) {
123 if (cmd
->no_stdout
) {
126 } else if (cmd
->stdout_to_stderr
) {
129 } else if (need_out
) {
132 } else if (cmd
->out
> 1) {
137 if (cmd
->no_stderr
) {
140 } else if (need_err
) {
146 die("chdir in start_command() not implemented");
148 env
= copy_environ();
149 for (; *cmd
->env
; cmd
->env
++)
150 env
= env_setenv(env
, *cmd
->env
);
154 strbuf_init(&git_cmd
, 0);
155 strbuf_addf(&git_cmd
, "git-%s", cmd
->argv
[0]);
156 cmd
->argv
[0] = git_cmd
.buf
;
159 cmd
->pid
= mingw_spawnvpe(cmd
->argv
[0], cmd
->argv
, env
);
164 strbuf_release(&git_cmd
);
166 cmd
->argv
[0] = sargv0
;
168 dup2(s0
, 0), close(s0
);
170 dup2(s1
, 1), close(s1
);
172 dup2(s2
, 2), close(s2
);
182 return -ERR_RUN_COMMAND_FORK
;
192 else if (cmd
->out
> 1)
201 static int wait_or_whine(pid_t pid
)
205 pid_t waiting
= waitpid(pid
, &status
, 0);
210 error("waitpid failed (%s)", strerror(errno
));
211 return -ERR_RUN_COMMAND_WAITPID
;
214 return -ERR_RUN_COMMAND_WAITPID_WRONG_PID
;
215 if (WIFSIGNALED(status
))
216 return -ERR_RUN_COMMAND_WAITPID_SIGNAL
;
218 if (!WIFEXITED(status
))
219 return -ERR_RUN_COMMAND_WAITPID_NOEXIT
;
220 code
= WEXITSTATUS(status
);
227 int finish_command(struct child_process
*cmd
)
233 return wait_or_whine(cmd
->pid
);
236 int run_command(struct child_process
*cmd
)
238 int code
= start_command(cmd
);
241 return finish_command(cmd
);
244 static void prepare_run_command_v_opt(struct child_process
*cmd
,
248 memset(cmd
, 0, sizeof(*cmd
));
250 cmd
->no_stdin
= opt
& RUN_COMMAND_NO_STDIN
? 1 : 0;
251 cmd
->git_cmd
= opt
& RUN_GIT_CMD
? 1 : 0;
252 cmd
->stdout_to_stderr
= opt
& RUN_COMMAND_STDOUT_TO_STDERR
? 1 : 0;
255 int run_command_v_opt(const char **argv
, int opt
)
257 struct child_process cmd
;
258 prepare_run_command_v_opt(&cmd
, argv
, opt
);
259 return run_command(&cmd
);
262 int run_command_v_opt_cd(const char **argv
, int opt
, const char *dir
)
264 struct child_process cmd
;
265 prepare_run_command_v_opt(&cmd
, argv
, opt
);
267 return run_command(&cmd
);
270 int run_command_v_opt_cd_env(const char **argv
, int opt
, const char *dir
, const char *const *env
)
272 struct child_process cmd
;
273 prepare_run_command_v_opt(&cmd
, argv
, opt
);
276 return run_command(&cmd
);
280 static __stdcall
unsigned run_thread(void *data
)
282 struct async
*async
= data
;
283 return async
->proc(async
->fd_for_proc
, async
->data
);
287 int start_async(struct async
*async
)
291 if (pipe(pipe_out
) < 0)
292 return error("cannot create pipe: %s", strerror(errno
));
293 async
->out
= pipe_out
[0];
297 if (async
->pid
< 0) {
298 error("fork (async) failed: %s", strerror(errno
));
299 close_pair(pipe_out
);
304 exit(!!async
->proc(pipe_out
[1], async
->data
));
308 async
->fd_for_proc
= pipe_out
[1];
309 async
->tid
= (HANDLE
) _beginthreadex(NULL
, 0, run_thread
, async
, 0, NULL
);
311 error("cannot create thread: %s", strerror(errno
));
312 close_pair(pipe_out
);
319 int finish_async(struct async
*async
)
324 if (wait_or_whine(async
->pid
))
325 ret
= error("waitpid (async) failed");
328 if (WaitForSingleObject(async
->tid
, INFINITE
) != WAIT_OBJECT_0
)
329 ret
= error("waiting for thread failed: %lu", GetLastError());
330 else if (!GetExitCodeThread(async
->tid
, &ret
))
331 ret
= error("cannot get thread exit code: %lu", GetLastError());
332 CloseHandle(async
->tid
);