ceamac
a301dfb44f
slocker-lite validates an OCI Image Layout tar, imports its layers into containers-storage's layer store in order, and mounts the assembled image using fuse-overlayfs, printing the resulting merged path. Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
79 lines
2.3 KiB
C++
79 lines
2.3 KiB
C++
// Copyright (C) 2026 Viorel Munteanu
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//
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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 2 of the License, or
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// (at your option) any later version.
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//
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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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//
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// You should have received a copy of the GNU General Public License along
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// with this program; if not, write to the Free Software Foundation, Inc.,
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// 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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#include "process.h"
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#include <sys/wait.h>
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#include <unistd.h>
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#include <cstring>
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#include <fmt/ranges.h>
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#include <spdlog/spdlog.h>
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ProcessResult run_process(const std::vector<std::string>& argv) {
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spdlog::debug("running external command: {}", fmt::join(argv, " "));
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int stdout_pipe[2];
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if (pipe(stdout_pipe) != 0) {
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return {-1, ""};
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}
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pid_t pid = fork();
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if (pid < 0) {
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close(stdout_pipe[0]);
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close(stdout_pipe[1]);
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return {-1, ""};
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}
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if (pid == 0) {
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close(stdout_pipe[0]);
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dup2(stdout_pipe[1], STDOUT_FILENO);
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close(stdout_pipe[1]);
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std::vector<char*> c_argv;
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c_argv.reserve(argv.size() + 1);
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for (const auto& arg : argv) {
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c_argv.push_back(const_cast<char*>(arg.c_str()));
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}
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c_argv.push_back(nullptr);
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execvp(c_argv[0], c_argv.data());
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const char* msg = "run_process: execvp failed\n";
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write(STDERR_FILENO, msg, std::strlen(msg));
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_exit(127);
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}
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close(stdout_pipe[1]);
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std::string output;
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char buffer[4096];
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ssize_t n;
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while ((n = read(stdout_pipe[0], buffer, sizeof(buffer))) > 0) {
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output.append(buffer, static_cast<size_t>(n));
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}
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close(stdout_pipe[0]);
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int status = 0;
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waitpid(pid, &status, 0);
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int exit_code = WIFEXITED(status) ? WEXITSTATUS(status) : -1;
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if (exit_code != 0) {
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spdlog::warn("external command failed (exit code {}): {}", exit_code, fmt::join(argv, " "));
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}
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return {exit_code, output};
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}
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