2 #include "run-command.h"
5 #include "argv-array.h"
6 #include "thread-utils.h"
9 void child_process_init(struct child_process
*child
)
11 memset(child
, 0, sizeof(*child
));
12 argv_array_init(&child
->args
);
13 argv_array_init(&child
->env_array
);
16 void child_process_clear(struct child_process
*child
)
18 argv_array_clear(&child
->args
);
19 argv_array_clear(&child
->env_array
);
22 struct child_to_clean
{
24 struct child_to_clean
*next
;
26 static struct child_to_clean
*children_to_clean
;
27 static int installed_child_cleanup_handler
;
29 static void cleanup_children(int sig
, int in_signal
)
31 while (children_to_clean
) {
32 struct child_to_clean
*p
= children_to_clean
;
33 children_to_clean
= p
->next
;
40 static void cleanup_children_on_signal(int sig
)
42 cleanup_children(sig
, 1);
47 static void cleanup_children_on_exit(void)
49 cleanup_children(SIGTERM
, 0);
52 static void mark_child_for_cleanup(pid_t pid
)
54 struct child_to_clean
*p
= xmalloc(sizeof(*p
));
56 p
->next
= children_to_clean
;
57 children_to_clean
= p
;
59 if (!installed_child_cleanup_handler
) {
60 atexit(cleanup_children_on_exit
);
61 sigchain_push_common(cleanup_children_on_signal
);
62 installed_child_cleanup_handler
= 1;
66 static void clear_child_for_cleanup(pid_t pid
)
68 struct child_to_clean
**pp
;
70 for (pp
= &children_to_clean
; *pp
; pp
= &(*pp
)->next
) {
71 struct child_to_clean
*clean_me
= *pp
;
73 if (clean_me
->pid
== pid
) {
81 static inline void close_pair(int fd
[2])
87 #ifndef GIT_WINDOWS_NATIVE
88 static inline void dup_devnull(int to
)
90 int fd
= open("/dev/null", O_RDWR
);
92 die_errno(_("open /dev/null failed"));
94 die_errno(_("dup2(%d,%d) failed"), fd
, to
);
99 static char *locate_in_PATH(const char *file
)
101 const char *p
= getenv("PATH");
102 struct strbuf buf
= STRBUF_INIT
;
108 const char *end
= strchrnul(p
, ':');
112 /* POSIX specifies an empty entry as the current directory. */
114 strbuf_add(&buf
, p
, end
- p
);
115 strbuf_addch(&buf
, '/');
117 strbuf_addstr(&buf
, file
);
119 if (!access(buf
.buf
, F_OK
))
120 return strbuf_detach(&buf
, NULL
);
127 strbuf_release(&buf
);
131 static int exists_in_PATH(const char *file
)
133 char *r
= locate_in_PATH(file
);
138 int sane_execvp(const char *file
, char * const argv
[])
140 if (!execvp(file
, argv
))
141 return 0; /* cannot happen ;-) */
144 * When a command can't be found because one of the directories
145 * listed in $PATH is unsearchable, execvp reports EACCES, but
146 * careful usability testing (read: analysis of occasional bug
147 * reports) reveals that "No such file or directory" is more
150 * We avoid commands with "/", because execvp will not do $PATH
151 * lookups in that case.
153 * The reassignment of EACCES to errno looks like a no-op below,
154 * but we need to protect against exists_in_PATH overwriting errno.
156 if (errno
== EACCES
&& !strchr(file
, '/'))
157 errno
= exists_in_PATH(file
) ? EACCES
: ENOENT
;
158 else if (errno
== ENOTDIR
&& !strchr(file
, '/'))
163 static const char **prepare_shell_cmd(struct argv_array
*out
, const char **argv
)
166 die("BUG: shell command is empty");
168 if (strcspn(argv
[0], "|&;<>()$`\\\"' \t\n*?[#~=%") != strlen(argv
[0])) {
169 #ifndef GIT_WINDOWS_NATIVE
170 argv_array_push(out
, SHELL_PATH
);
172 argv_array_push(out
, "sh");
174 argv_array_push(out
, "-c");
177 * If we have no extra arguments, we do not even need to
178 * bother with the "$@" magic.
181 argv_array_push(out
, argv
[0]);
183 argv_array_pushf(out
, "%s \"$@\"", argv
[0]);
186 argv_array_pushv(out
, argv
);
190 #ifndef GIT_WINDOWS_NATIVE
191 static int execv_shell_cmd(const char **argv
)
193 struct argv_array nargv
= ARGV_ARRAY_INIT
;
194 prepare_shell_cmd(&nargv
, argv
);
195 trace_argv_printf(nargv
.argv
, "trace: exec:");
196 sane_execvp(nargv
.argv
[0], (char **)nargv
.argv
);
197 argv_array_clear(&nargv
);
202 #ifndef GIT_WINDOWS_NATIVE
203 static int child_notifier
= -1;
205 static void notify_parent(void)
208 * execvp failed. If possible, we'd like to let start_command
209 * know, so failures like ENOENT can be handled right away; but
210 * otherwise, finish_command will still report the error.
212 xwrite(child_notifier
, "", 1);
216 static inline void set_cloexec(int fd
)
218 int flags
= fcntl(fd
, F_GETFD
);
220 fcntl(fd
, F_SETFD
, flags
| FD_CLOEXEC
);
223 static int wait_or_whine(pid_t pid
, const char *argv0
, int in_signal
)
225 int status
, code
= -1;
227 int failed_errno
= 0;
229 while ((waiting
= waitpid(pid
, &status
, 0)) < 0 && errno
== EINTR
)
235 failed_errno
= errno
;
236 error_errno("waitpid for %s failed", argv0
);
237 } else if (waiting
!= pid
) {
238 error("waitpid is confused (%s)", argv0
);
239 } else if (WIFSIGNALED(status
)) {
240 code
= WTERMSIG(status
);
241 if (code
!= SIGINT
&& code
!= SIGQUIT
&& code
!= SIGPIPE
)
242 error("%s died of signal %d", argv0
, code
);
244 * This return value is chosen so that code & 0xff
245 * mimics the exit code that a POSIX shell would report for
246 * a program that died from this signal.
249 } else if (WIFEXITED(status
)) {
250 code
= WEXITSTATUS(status
);
252 * Convert special exit code when execvp failed.
256 failed_errno
= ENOENT
;
259 error("waitpid is confused (%s)", argv0
);
262 clear_child_for_cleanup(pid
);
264 errno
= failed_errno
;
268 int start_command(struct child_process
*cmd
)
270 int need_in
, need_out
, need_err
;
271 int fdin
[2], fdout
[2], fderr
[2];
276 cmd
->argv
= cmd
->args
.argv
;
278 cmd
->env
= cmd
->env_array
.argv
;
281 * In case of errors we must keep the promise to close FDs
282 * that have been passed in via ->in and ->out.
285 need_in
= !cmd
->no_stdin
&& cmd
->in
< 0;
287 if (pipe(fdin
) < 0) {
288 failed_errno
= errno
;
291 str
= "standard input";
297 need_out
= !cmd
->no_stdout
298 && !cmd
->stdout_to_stderr
301 if (pipe(fdout
) < 0) {
302 failed_errno
= errno
;
307 str
= "standard output";
313 need_err
= !cmd
->no_stderr
&& cmd
->err
< 0;
315 if (pipe(fderr
) < 0) {
316 failed_errno
= errno
;
325 str
= "standard error";
327 error("cannot create %s pipe for %s: %s",
328 str
, cmd
->argv
[0], strerror(failed_errno
));
329 child_process_clear(cmd
);
330 errno
= failed_errno
;
336 trace_argv_printf(cmd
->argv
, "trace: run_command:");
339 #ifndef GIT_WINDOWS_NATIVE
342 if (pipe(notify_pipe
))
343 notify_pipe
[0] = notify_pipe
[1] = -1;
346 failed_errno
= errno
;
349 * Redirect the channel to write syscall error messages to
350 * before redirecting the process's stderr so that all die()
351 * in subsequent call paths use the parent's stderr.
353 if (cmd
->no_stderr
|| need_err
) {
354 int child_err
= dup(2);
355 set_cloexec(child_err
);
356 set_error_handle(fdopen(child_err
, "w"));
359 close(notify_pipe
[0]);
360 set_cloexec(notify_pipe
[1]);
361 child_notifier
= notify_pipe
[1];
362 atexit(notify_parent
);
369 } else if (cmd
->in
) {
379 } else if (cmd
->err
> 1) {
386 else if (cmd
->stdout_to_stderr
)
391 } else if (cmd
->out
> 1) {
396 if (cmd
->dir
&& chdir(cmd
->dir
))
397 die_errno("exec '%s': cd to '%s' failed", cmd
->argv
[0],
400 for (; *cmd
->env
; cmd
->env
++) {
401 if (strchr(*cmd
->env
, '='))
402 putenv((char *)*cmd
->env
);
408 execv_git_cmd(cmd
->argv
);
409 else if (cmd
->use_shell
)
410 execv_shell_cmd(cmd
->argv
);
412 sane_execvp(cmd
->argv
[0], (char *const*) cmd
->argv
);
413 if (errno
== ENOENT
) {
414 if (!cmd
->silent_exec_failure
)
415 error("cannot run %s: %s", cmd
->argv
[0],
419 die_errno("cannot exec '%s'", cmd
->argv
[0]);
423 error_errno("cannot fork() for %s", cmd
->argv
[0]);
424 else if (cmd
->clean_on_exit
)
425 mark_child_for_cleanup(cmd
->pid
);
428 * Wait for child's execvp. If the execvp succeeds (or if fork()
429 * failed), EOF is seen immediately by the parent. Otherwise, the
430 * child process sends a single byte.
431 * Note that use of this infrastructure is completely advisory,
432 * therefore, we keep error checks minimal.
434 close(notify_pipe
[1]);
435 if (read(notify_pipe
[0], ¬ify_pipe
[1], 1) == 1) {
437 * At this point we know that fork() succeeded, but execvp()
438 * failed. Errors have been reported to our stderr.
440 wait_or_whine(cmd
->pid
, cmd
->argv
[0], 0);
441 failed_errno
= errno
;
444 close(notify_pipe
[0]);
448 int fhin
= 0, fhout
= 1, fherr
= 2;
449 const char **sargv
= cmd
->argv
;
450 struct argv_array nargv
= ARGV_ARRAY_INIT
;
453 fhin
= open("/dev/null", O_RDWR
);
460 fherr
= open("/dev/null", O_RDWR
);
462 fherr
= dup(fderr
[1]);
463 else if (cmd
->err
> 2)
464 fherr
= dup(cmd
->err
);
467 fhout
= open("/dev/null", O_RDWR
);
468 else if (cmd
->stdout_to_stderr
)
471 fhout
= dup(fdout
[1]);
472 else if (cmd
->out
> 1)
473 fhout
= dup(cmd
->out
);
476 cmd
->argv
= prepare_git_cmd(&nargv
, cmd
->argv
);
477 else if (cmd
->use_shell
)
478 cmd
->argv
= prepare_shell_cmd(&nargv
, cmd
->argv
);
480 cmd
->pid
= mingw_spawnvpe(cmd
->argv
[0], cmd
->argv
, (char**) cmd
->env
,
481 cmd
->dir
, fhin
, fhout
, fherr
);
482 failed_errno
= errno
;
483 if (cmd
->pid
< 0 && (!cmd
->silent_exec_failure
|| errno
!= ENOENT
))
484 error_errno("cannot spawn %s", cmd
->argv
[0]);
485 if (cmd
->clean_on_exit
&& cmd
->pid
>= 0)
486 mark_child_for_cleanup(cmd
->pid
);
488 argv_array_clear(&nargv
);
512 child_process_clear(cmd
);
513 errno
= failed_errno
;
535 int finish_command(struct child_process
*cmd
)
537 int ret
= wait_or_whine(cmd
->pid
, cmd
->argv
[0], 0);
538 child_process_clear(cmd
);
542 int finish_command_in_signal(struct child_process
*cmd
)
544 return wait_or_whine(cmd
->pid
, cmd
->argv
[0], 1);
548 int run_command(struct child_process
*cmd
)
552 if (cmd
->out
< 0 || cmd
->err
< 0)
553 die("BUG: run_command with a pipe can cause deadlock");
555 code
= start_command(cmd
);
558 return finish_command(cmd
);
561 int run_command_v_opt(const char **argv
, int opt
)
563 return run_command_v_opt_cd_env(argv
, opt
, NULL
, NULL
);
566 int run_command_v_opt_cd_env(const char **argv
, int opt
, const char *dir
, const char *const *env
)
568 struct child_process cmd
= CHILD_PROCESS_INIT
;
570 cmd
.no_stdin
= opt
& RUN_COMMAND_NO_STDIN
? 1 : 0;
571 cmd
.git_cmd
= opt
& RUN_GIT_CMD
? 1 : 0;
572 cmd
.stdout_to_stderr
= opt
& RUN_COMMAND_STDOUT_TO_STDERR
? 1 : 0;
573 cmd
.silent_exec_failure
= opt
& RUN_SILENT_EXEC_FAILURE
? 1 : 0;
574 cmd
.use_shell
= opt
& RUN_USING_SHELL
? 1 : 0;
575 cmd
.clean_on_exit
= opt
& RUN_CLEAN_ON_EXIT
? 1 : 0;
578 return run_command(&cmd
);
582 static pthread_t main_thread
;
583 static int main_thread_set
;
584 static pthread_key_t async_key
;
585 static pthread_key_t async_die_counter
;
587 static void *run_thread(void *data
)
589 struct async
*async
= data
;
592 pthread_setspecific(async_key
, async
);
593 ret
= async
->proc(async
->proc_in
, async
->proc_out
, async
->data
);
597 static NORETURN
void die_async(const char *err
, va_list params
)
599 vreportf("fatal: ", err
, params
);
602 struct async
*async
= pthread_getspecific(async_key
);
603 if (async
->proc_in
>= 0)
604 close(async
->proc_in
);
605 if (async
->proc_out
>= 0)
606 close(async
->proc_out
);
607 pthread_exit((void *)128);
613 static int async_die_is_recursing(void)
615 void *ret
= pthread_getspecific(async_die_counter
);
616 pthread_setspecific(async_die_counter
, (void *)1);
622 if (!main_thread_set
)
623 return 0; /* no asyncs started yet */
624 return !pthread_equal(main_thread
, pthread_self());
627 void NORETURN
async_exit(int code
)
629 pthread_exit((void *)(intptr_t)code
);
635 void (**handlers
)(void);
640 static int git_atexit_installed
;
642 static void git_atexit_dispatch(void)
646 for (i
=git_atexit_hdlrs
.nr
; i
; i
--)
647 git_atexit_hdlrs
.handlers
[i
-1]();
650 static void git_atexit_clear(void)
652 free(git_atexit_hdlrs
.handlers
);
653 memset(&git_atexit_hdlrs
, 0, sizeof(git_atexit_hdlrs
));
654 git_atexit_installed
= 0;
658 int git_atexit(void (*handler
)(void))
660 ALLOC_GROW(git_atexit_hdlrs
.handlers
, git_atexit_hdlrs
.nr
+ 1, git_atexit_hdlrs
.alloc
);
661 git_atexit_hdlrs
.handlers
[git_atexit_hdlrs
.nr
++] = handler
;
662 if (!git_atexit_installed
) {
663 if (atexit(&git_atexit_dispatch
))
665 git_atexit_installed
= 1;
669 #define atexit git_atexit
671 static int process_is_async
;
674 return process_is_async
;
677 void NORETURN
async_exit(int code
)
684 int start_async(struct async
*async
)
686 int need_in
, need_out
;
687 int fdin
[2], fdout
[2];
688 int proc_in
, proc_out
;
690 need_in
= async
->in
< 0;
692 if (pipe(fdin
) < 0) {
695 return error_errno("cannot create pipe");
700 need_out
= async
->out
< 0;
702 if (pipe(fdout
) < 0) {
707 return error_errno("cannot create pipe");
709 async
->out
= fdout
[0];
722 proc_out
= async
->out
;
727 /* Flush stdio before fork() to avoid cloning buffers */
731 if (async
->pid
< 0) {
732 error_errno("fork (async) failed");
741 process_is_async
= 1;
742 exit(!!async
->proc(proc_in
, proc_out
, async
->data
));
745 mark_child_for_cleanup(async
->pid
);
757 if (!main_thread_set
) {
759 * We assume that the first time that start_async is called
760 * it is from the main thread.
763 main_thread
= pthread_self();
764 pthread_key_create(&async_key
, NULL
);
765 pthread_key_create(&async_die_counter
, NULL
);
766 set_die_routine(die_async
);
767 set_die_is_recursing_routine(async_die_is_recursing
);
771 set_cloexec(proc_in
);
773 set_cloexec(proc_out
);
774 async
->proc_in
= proc_in
;
775 async
->proc_out
= proc_out
;
777 int err
= pthread_create(&async
->tid
, NULL
, run_thread
, async
);
779 error_errno("cannot create thread");
799 int finish_async(struct async
*async
)
802 return wait_or_whine(async
->pid
, "child process", 0);
804 void *ret
= (void *)(intptr_t)(-1);
806 if (pthread_join(async
->tid
, &ret
))
807 error("pthread_join failed");
808 return (int)(intptr_t)ret
;
812 const char *find_hook(const char *name
)
814 static struct strbuf path
= STRBUF_INIT
;
817 strbuf_git_path(&path
, "hooks/%s", name
);
818 if (access(path
.buf
, X_OK
) < 0)
823 int run_hook_ve(const char *const *env
, const char *name
, va_list args
)
825 struct child_process hook
= CHILD_PROCESS_INIT
;
832 argv_array_push(&hook
.args
, p
);
833 while ((p
= va_arg(args
, const char *)))
834 argv_array_push(&hook
.args
, p
);
837 hook
.stdout_to_stderr
= 1;
839 return run_command(&hook
);
842 int run_hook_le(const char *const *env
, const char *name
, ...)
847 va_start(args
, name
);
848 ret
= run_hook_ve(env
, name
, args
);
854 int capture_command(struct child_process
*cmd
, struct strbuf
*buf
, size_t hint
)
857 if (start_command(cmd
) < 0)
860 if (strbuf_read(buf
, cmd
->out
, hint
) < 0) {
862 finish_command(cmd
); /* throw away exit code */
867 return finish_command(cmd
);
876 struct parallel_processes
{
882 get_next_task_fn get_next_task
;
883 start_failure_fn start_failure
;
884 task_finished_fn task_finished
;
887 enum child_state state
;
888 struct child_process process
;
893 * The struct pollfd is logically part of *children,
894 * but the system call expects it as its own array.
898 unsigned shutdown
: 1;
901 struct strbuf buffered_output
; /* of finished children */
904 static int default_start_failure(struct strbuf
*err
,
911 static int default_task_finished(int result
,
919 static void kill_children(struct parallel_processes
*pp
, int signo
)
921 int i
, n
= pp
->max_processes
;
923 for (i
= 0; i
< n
; i
++)
924 if (pp
->children
[i
].state
== GIT_CP_WORKING
)
925 kill(pp
->children
[i
].process
.pid
, signo
);
928 static struct parallel_processes
*pp_for_signal
;
930 static void handle_children_on_signal(int signo
)
932 kill_children(pp_for_signal
, signo
);
937 static void pp_init(struct parallel_processes
*pp
,
939 get_next_task_fn get_next_task
,
940 start_failure_fn start_failure
,
941 task_finished_fn task_finished
,
949 pp
->max_processes
= n
;
951 trace_printf("run_processes_parallel: preparing to run up to %d tasks", n
);
955 die("BUG: you need to specify a get_next_task function");
956 pp
->get_next_task
= get_next_task
;
958 pp
->start_failure
= start_failure
? start_failure
: default_start_failure
;
959 pp
->task_finished
= task_finished
? task_finished
: default_task_finished
;
961 pp
->nr_processes
= 0;
962 pp
->output_owner
= 0;
964 pp
->children
= xcalloc(n
, sizeof(*pp
->children
));
965 pp
->pfd
= xcalloc(n
, sizeof(*pp
->pfd
));
966 strbuf_init(&pp
->buffered_output
, 0);
968 for (i
= 0; i
< n
; i
++) {
969 strbuf_init(&pp
->children
[i
].err
, 0);
970 child_process_init(&pp
->children
[i
].process
);
971 pp
->pfd
[i
].events
= POLLIN
| POLLHUP
;
976 sigchain_push_common(handle_children_on_signal
);
979 static void pp_cleanup(struct parallel_processes
*pp
)
983 trace_printf("run_processes_parallel: done");
984 for (i
= 0; i
< pp
->max_processes
; i
++) {
985 strbuf_release(&pp
->children
[i
].err
);
986 child_process_clear(&pp
->children
[i
].process
);
993 * When get_next_task added messages to the buffer in its last
994 * iteration, the buffered output is non empty.
996 fputs(pp
->buffered_output
.buf
, stderr
);
997 strbuf_release(&pp
->buffered_output
);
999 sigchain_pop_common();
1003 * 0 if a new task was started.
1004 * 1 if no new jobs was started (get_next_task ran out of work, non critical
1005 * problem with starting a new command)
1006 * <0 no new job was started, user wishes to shutdown early. Use negative code
1007 * to signal the children.
1009 static int pp_start_one(struct parallel_processes
*pp
)
1013 for (i
= 0; i
< pp
->max_processes
; i
++)
1014 if (pp
->children
[i
].state
== GIT_CP_FREE
)
1016 if (i
== pp
->max_processes
)
1017 die("BUG: bookkeeping is hard");
1019 code
= pp
->get_next_task(&pp
->children
[i
].process
,
1020 &pp
->children
[i
].err
,
1022 &pp
->children
[i
].data
);
1024 strbuf_addbuf(&pp
->buffered_output
, &pp
->children
[i
].err
);
1025 strbuf_reset(&pp
->children
[i
].err
);
1028 pp
->children
[i
].process
.err
= -1;
1029 pp
->children
[i
].process
.stdout_to_stderr
= 1;
1030 pp
->children
[i
].process
.no_stdin
= 1;
1032 if (start_command(&pp
->children
[i
].process
)) {
1033 code
= pp
->start_failure(&pp
->children
[i
].err
,
1035 &pp
->children
[i
].data
);
1036 strbuf_addbuf(&pp
->buffered_output
, &pp
->children
[i
].err
);
1037 strbuf_reset(&pp
->children
[i
].err
);
1044 pp
->children
[i
].state
= GIT_CP_WORKING
;
1045 pp
->pfd
[i
].fd
= pp
->children
[i
].process
.err
;
1049 static void pp_buffer_stderr(struct parallel_processes
*pp
, int output_timeout
)
1053 while ((i
= poll(pp
->pfd
, pp
->max_processes
, output_timeout
)) < 0) {
1060 /* Buffer output from all pipes. */
1061 for (i
= 0; i
< pp
->max_processes
; i
++) {
1062 if (pp
->children
[i
].state
== GIT_CP_WORKING
&&
1063 pp
->pfd
[i
].revents
& (POLLIN
| POLLHUP
)) {
1064 int n
= strbuf_read_once(&pp
->children
[i
].err
,
1065 pp
->children
[i
].process
.err
, 0);
1067 close(pp
->children
[i
].process
.err
);
1068 pp
->children
[i
].state
= GIT_CP_WAIT_CLEANUP
;
1070 if (errno
!= EAGAIN
)
1076 static void pp_output(struct parallel_processes
*pp
)
1078 int i
= pp
->output_owner
;
1079 if (pp
->children
[i
].state
== GIT_CP_WORKING
&&
1080 pp
->children
[i
].err
.len
) {
1081 fputs(pp
->children
[i
].err
.buf
, stderr
);
1082 strbuf_reset(&pp
->children
[i
].err
);
1086 static int pp_collect_finished(struct parallel_processes
*pp
)
1089 int n
= pp
->max_processes
;
1092 while (pp
->nr_processes
> 0) {
1093 for (i
= 0; i
< pp
->max_processes
; i
++)
1094 if (pp
->children
[i
].state
== GIT_CP_WAIT_CLEANUP
)
1096 if (i
== pp
->max_processes
)
1099 code
= finish_command(&pp
->children
[i
].process
);
1101 code
= pp
->task_finished(code
,
1102 &pp
->children
[i
].err
, pp
->data
,
1103 &pp
->children
[i
].data
);
1111 pp
->children
[i
].state
= GIT_CP_FREE
;
1113 child_process_init(&pp
->children
[i
].process
);
1115 if (i
!= pp
->output_owner
) {
1116 strbuf_addbuf(&pp
->buffered_output
, &pp
->children
[i
].err
);
1117 strbuf_reset(&pp
->children
[i
].err
);
1119 fputs(pp
->children
[i
].err
.buf
, stderr
);
1120 strbuf_reset(&pp
->children
[i
].err
);
1122 /* Output all other finished child processes */
1123 fputs(pp
->buffered_output
.buf
, stderr
);
1124 strbuf_reset(&pp
->buffered_output
);
1127 * Pick next process to output live.
1129 * For now we pick it randomly by doing a round
1130 * robin. Later we may want to pick the one with
1131 * the most output or the longest or shortest
1132 * running process time.
1134 for (i
= 0; i
< n
; i
++)
1135 if (pp
->children
[(pp
->output_owner
+ i
) % n
].state
== GIT_CP_WORKING
)
1137 pp
->output_owner
= (pp
->output_owner
+ i
) % n
;
1143 int run_processes_parallel(int n
,
1144 get_next_task_fn get_next_task
,
1145 start_failure_fn start_failure
,
1146 task_finished_fn task_finished
,
1150 int output_timeout
= 100;
1152 struct parallel_processes pp
;
1154 pp_init(&pp
, n
, get_next_task
, start_failure
, task_finished
, pp_cb
);
1157 i
< spawn_cap
&& !pp
.shutdown
&&
1158 pp
.nr_processes
< pp
.max_processes
;
1160 code
= pp_start_one(&pp
);
1165 kill_children(&pp
, -code
);
1169 if (!pp
.nr_processes
)
1171 pp_buffer_stderr(&pp
, output_timeout
);
1173 code
= pp_collect_finished(&pp
);
1177 kill_children(&pp
, -code
);