kopia lustrzana https://github.com/weetmuts/wmbusmeters
76 wiersze
2.2 KiB
C++
76 wiersze
2.2 KiB
C++
/*
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Copyright (C) 2017-2018 Fredrik Öhrström
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "shell.h"
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#include "util.h"
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#include <memory.h>
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#include <pthread.h>
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#include <sys/types.h>
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#include <wait.h>
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#include <unistd.h>
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void invokeShell(string program, vector<string> args, vector<string> envs)
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{
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vector<const char*> argv(args.size()+2);
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argv[0] = program.c_str();
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int i = 1;
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debug("exec \"%s\"\n", program.c_str());
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for (auto &a : args) {
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argv[i] = a.c_str();
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i++;
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debug("arg \"%s\"\n", a.c_str());
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}
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argv[i] = NULL;
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vector<const char*> env(envs.size()+1);
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env[0] = program.c_str();
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i = 0;
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for (auto &e : envs) {
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env[i] = e.c_str();
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i++;
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debug("env \"%s\"\n", e.c_str());
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}
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env[i] = NULL;
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pid_t pid = fork();
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int status;
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if (pid == 0) {
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// I am the child!
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close(0); // Close stdin
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execvpe(program.c_str(), (char*const*)&argv[0], (char*const*)&env[0]);
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perror("Execvp failed:");
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error("Invoking shell %s failed!\n", program.c_str());
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} else {
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if (pid == -1) {
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error("Could not fork!\n");
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}
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debug("waiting for child %d.\n", pid);
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// Wait for the child to finish!
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waitpid(pid, &status, 0);
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if (WIFEXITED(status)) {
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// Child exited properly.
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int rc = WEXITSTATUS(status);
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debug("%s: return code %d\n", program.c_str(), rc);
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if (rc != 0) {
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warning("%s exited with non-zero return code: %d\n", program.c_str(), rc);
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}
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}
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}
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}
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