bazel-java/src/main/tools/process-tools-linux.cc at master · codemod/bazel-java · GitHub

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// Licensed under the Apache License, Version 2.0 (the "License");

// you may not use this file except in compliance with the License.

// You may obtain a copy of the License at

// http://www.apache.org/licenses/LICENSE-2.0

// Unless required by applicable law or agreed to in writing, software

// distributed under the License is distributed on an "AS IS" BASIS,

// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

// See the License for the specific language governing permissions and

// limitations under the License.

#include <errno.h>

#include <signal.h>

#include <stdio.h>

#include <sys/types.h>

#include <sys/wait.h>

#include <unistd.h>

#include "src/main/tools/process-tools.h"

int TerminateAndWaitForAll(pid_t pid) {

kill(-pid, SIGKILL);

int res;

while ((res = waitpid(-1, nullptr, WNOHANG)) > 0) {

// Got one child; try again.

}

if (res == -1) {

// The fast path got all children, so there is nothing else to do.

return 0;

}

// Cope with children that may have escaped the process group or that

// did not exit quickly enough.

FILE *f = fopen("/proc/thread-self/children", "r");

if (f == nullptr) {

// Oh oh. This feature may be disabled, in which case there is

// nothing we can do. Stop early and let any stale children be

// reparented to init.

return 0;

}

setbuf(f, nullptr);

int child_pid;

while ((waitpid(-1, nullptr, WNOHANG) != -1 || errno != ECHILD) &&

(rewind(f), 1 == fscanf(f, "%d", &child_pid))) {

kill(child_pid, SIGKILL);

usleep(100);

}

fclose(f);

return 0;

}

bazel-java/src/main/tools/process-tools-linux.cc at master · codemod/bazel-java · GitHub

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