/*
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* virtualization.cpp
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*
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* Created on: Dec 15, 2019
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* Author: GC
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*/
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#include <paths.h>
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#include <sys/stat.h>
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#include <unistd.h>
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#include <stdio.h>
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#include <string.h>
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#include <dirent.h>
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#include <sys/utsname.h>
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#include "../../base/base.h"
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#include "../cpu_info.hpp"
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#include "../execution_environment.hpp"
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namespace license {
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// 0=NO 1=Docker/2=Lxc
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static int checkContainerProc() {
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// in docer /proc/self/cgroups contains the "docker" or "lxc" string
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// https://stackoverflow.com/questions/23513045/how-to-check-if-a-process-is-running-inside-docker-container
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char path[MAX_PATH] = {0};
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char proc_path[MAX_PATH], pidStr[64];
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pid_t pid = getpid();
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sprintf(pidStr, "%d", pid);
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strcpy(proc_path, "/proc/");
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strcat(proc_path, pidStr);
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strcat(proc_path, "/cgroup");
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FILE *fp;
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char *line = NULL;
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size_t len = 0;
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ssize_t read;
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int result = 0;
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fp = fopen(proc_path, "r");
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if (fp == NULL) {
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return 0;
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}
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while ((read = getline(&line, &len, fp)) != -1 && result == 0) {
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// line[len]=0;
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// printf("Retrieved line of length %zu:\n", read);
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// printf("%s", line);
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if (strstr(line, "docker") != NULL) {
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result = 1;
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}
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if (strstr(line, "lxc") != NULL) {
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result = 2;
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}
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}
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fclose(fp);
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if (line) free(line);
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return result;
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}
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// 0=NO 1=Docker/Lxc
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static int checkLXC() { return (access("/var/run/systemd/container", F_OK) == 0) ? 1 : 0; }
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VIRTUALIZATION ExecutionEnvironment::getVirtualization() {
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VIRTUALIZATION result = NONE;
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CpuInfo cpuInfo;
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int isContainer = checkContainerProc();
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if (isContainer == 1) {
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result = CONTAINER;
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} else if (isContainer == 2 || checkLXC()) {
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result = CONTAINER;
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} else if (cpuInfo.cpu_virtual()) {
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result = VM;
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} else {
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}
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return result;
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}
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} // namespace license
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