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// Copyright 2014 The Bazel Authors. All rights reserved.
//
// 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.
// process-wrapper runs a subprocess with a given timeout (optional),
// redirecting stdout and stderr to given files. Upon exit, whether
// from normal termination or timeout, the subprocess (and any of its children)
// is killed.
//
// The exit status of this program is whatever the child process returned,
// unless process-wrapper receives a signal. ie, on SIGTERM this program will
// die with raise(SIGTERM) even if the child process handles SIGTERM with
// exit(0).
#include "src/main/tools/process-wrapper.h"
#include <err.h>
#include <errno.h>
#include <signal.h>
#include <stdbool.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <sys/wait.h>
#include <unistd.h>
#include <string>
#include <vector>
#include "src/main/tools/logging.h"
#include "src/main/tools/process-tools.h"
#include "src/main/tools/process-wrapper-legacy.h"
struct Options opt;
// Print out a usage error and exit with EXIT_FAILURE.
static void Usage(char *program_name) {
fprintf(stderr,
"Usage: %s <timeout-secs> <kill-delay-secs> <stdout-redirect> "
"<stderr-redirect> <command> [args] ...\n",
program_name);
exit(EXIT_FAILURE);
}
// Parse the command line flags and return the result in an Options structure
// passed as argument.
static void ParseCommandLine(std::vector<char *> args) {
if (args.size() < 5) {
Usage(args.front());
}
int optind = 1;
if (sscanf(args[optind++], "%lf", &opt.timeout_secs) != 1) {
DIE("timeout_secs is not a real number.\n");
}
if (sscanf(args[optind++], "%lf", &opt.kill_delay_secs) != 1) {
DIE("kill_delay_secs is not a real number.\n");
}
opt.stdout_path.assign(args[optind++]);
opt.stderr_path.assign(args[optind++]);
opt.args.assign(args.begin() + optind, args.end());
// argv[] passed to execve() must be a null-terminated array.
opt.args.push_back(nullptr);
}
int main(int argc, char *argv[]) {
std::vector<char *> args(argv, argv + argc);
ParseCommandLine(args);
SwitchToEuid();
SwitchToEgid();
Redirect(opt.stdout_path, STDOUT_FILENO);
Redirect(opt.stderr_path, STDERR_FILENO);
LegacyProcessWrapper::RunCommand();
return 0;
}
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