#include "cache.h"
#include "run-command.h"
#include "exec_cmd.h"
+#include "sigchain.h"
#include "argv-array.h"
+#ifndef SHELL_PATH
+# define SHELL_PATH "/bin/sh"
+#endif
+
+struct child_to_clean {
+ pid_t pid;
+ struct child_to_clean *next;
+};
+static struct child_to_clean *children_to_clean;
+static int installed_child_cleanup_handler;
+
+static void cleanup_children(int sig)
+{
+ while (children_to_clean) {
+ struct child_to_clean *p = children_to_clean;
+ children_to_clean = p->next;
+ kill(p->pid, sig);
+ free(p);
+ }
+}
+
+static void cleanup_children_on_signal(int sig)
+{
+ cleanup_children(sig);
+ sigchain_pop(sig);
+ raise(sig);
+}
+
+static void cleanup_children_on_exit(void)
+{
+ cleanup_children(SIGTERM);
+}
+
+static void mark_child_for_cleanup(pid_t pid)
+{
+ struct child_to_clean *p = xmalloc(sizeof(*p));
+ p->pid = pid;
+ p->next = children_to_clean;
+ children_to_clean = p;
+
+ if (!installed_child_cleanup_handler) {
+ atexit(cleanup_children_on_exit);
+ sigchain_push_common(cleanup_children_on_signal);
+ installed_child_cleanup_handler = 1;
+ }
+}
+
+static void clear_child_for_cleanup(pid_t pid)
+{
+ struct child_to_clean **pp;
+
+ for (pp = &children_to_clean; *pp; pp = &(*pp)->next) {
+ struct child_to_clean *clean_me = *pp;
+
+ if (clean_me->pid == pid) {
+ *pp = clean_me->next;
+ free(clean_me);
+ return;
+ }
+ }
+}
+
static inline void close_pair(int fd[2])
{
close(fd[0]);
die("BUG: shell command is empty");
if (strcspn(argv[0], "|&;<>()$`\\\"' \t\n*?[#~=%") != strlen(argv[0])) {
+#ifndef WIN32
+ nargv[nargc++] = SHELL_PATH;
+#else
nargv[nargc++] = "sh";
+#endif
nargv[nargc++] = "-c";
if (argc < 2)
fcntl(fd, F_SETFD, flags | FD_CLOEXEC);
}
-static int wait_or_whine(pid_t pid, const char *argv0, int silent_exec_failure)
+static int wait_or_whine(pid_t pid, const char *argv0)
{
int status, code = -1;
pid_t waiting;
error("waitpid is confused (%s)", argv0);
} else if (WIFSIGNALED(status)) {
code = WTERMSIG(status);
- error("%s died of signal %d", argv0, code);
+ if (code != SIGINT && code != SIGQUIT)
+ 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;
+ code += 128;
} else if (WIFEXITED(status)) {
code = WEXITSTATUS(status);
/*
} else {
error("waitpid is confused (%s)", argv0);
}
+
+ clear_child_for_cleanup(pid);
+
errno = failed_errno;
return code;
}
unsetenv(*cmd->env);
}
}
- if (cmd->preexec_cb) {
- /*
- * We cannot predict what the pre-exec callback does.
- * Forgo parent notification.
- */
- close(child_notifier);
- child_notifier = -1;
-
- cmd->preexec_cb();
- }
if (cmd->git_cmd) {
execv_git_cmd(cmd->argv);
} else if (cmd->use_shell) {
if (cmd->pid < 0)
error("cannot fork() for %s: %s", cmd->argv[0],
strerror(failed_errno = errno));
+ else if (cmd->clean_on_exit)
+ mark_child_for_cleanup(cmd->pid);
/*
* Wait for child's execvp. If the execvp succeeds (or if fork()
* At this point we know that fork() succeeded, but execvp()
* failed. Errors have been reported to our stderr.
*/
- wait_or_whine(cmd->pid, cmd->argv[0],
- cmd->silent_exec_failure);
+ wait_or_whine(cmd->pid, cmd->argv[0]);
failed_errno = errno;
cmd->pid = -1;
}
close(notify_pipe[0]);
+
}
#else
{
failed_errno = errno;
if (cmd->pid < 0 && (!cmd->silent_exec_failure || errno != ENOENT))
error("cannot spawn %s: %s", cmd->argv[0], strerror(errno));
+ if (cmd->clean_on_exit && cmd->pid >= 0)
+ mark_child_for_cleanup(cmd->pid);
if (cmd->env)
free_environ(env);
int finish_command(struct child_process *cmd)
{
- return wait_or_whine(cmd->pid, cmd->argv[0], cmd->silent_exec_failure);
+ return wait_or_whine(cmd->pid, cmd->argv[0]);
}
int run_command(struct child_process *cmd)
cmd->stdout_to_stderr = opt & RUN_COMMAND_STDOUT_TO_STDERR ? 1 : 0;
cmd->silent_exec_failure = opt & RUN_SILENT_EXEC_FAILURE ? 1 : 0;
cmd->use_shell = opt & RUN_USING_SHELL ? 1 : 0;
+ cmd->clean_on_exit = opt & RUN_CLEAN_ON_EXIT ? 1 : 0;
}
int run_command_v_opt(const char **argv, int opt)
exit(!!async->proc(proc_in, proc_out, async->data));
}
+ mark_child_for_cleanup(async->pid);
+
if (need_in)
close(fdin[0]);
else if (async->in)
int finish_async(struct async *async)
{
#ifdef NO_PTHREADS
- return wait_or_whine(async->pid, "child process", 0);
+ return wait_or_whine(async->pid, "child process");
#else
void *ret = (void *)(intptr_t)(-1);