// SPDX-License-Identifier: GPL-2.0 #define _GNU_SOURCE #include <errno.h> #include <fcntl.h> #include <sched.h> #include <stdio.h> #include <stdbool.h> #include <sys/stat.h> #include <sys/syscall.h> #include <sys/types.h> #include <sys/wait.h> #include <time.h> #include <unistd.h> #include <string.h> #include "log.h" #include "timens.h" #define OFFSET (36000) int main(int argc, char *argv[]) { struct timespec now, tst; int status, i; pid_t pid; if (argc > 1) { if (sscanf(argv[1], "%ld", &now.tv_sec) != 1) return pr_perror("sscanf"); for (i = 0; i < 2; i++) { _gettime(CLOCK_MONOTONIC, &tst, i); if (abs(tst.tv_sec - now.tv_sec) > 5) return pr_fail("%ld %ld\n", now.tv_sec, tst.tv_sec); } return 0; } nscheck(); ksft_set_plan(1); clock_gettime(CLOCK_MONOTONIC, &now); if (unshare_timens()) return 1; if (_settime(CLOCK_MONOTONIC, OFFSET)) return 1; for (i = 0; i < 2; i++) { _gettime(CLOCK_MONOTONIC, &tst, i); if (abs(tst.tv_sec - now.tv_sec) > 5) return pr_fail("%ld %ld\n", now.tv_sec, tst.tv_sec); } if (argc > 1) return 0; pid = fork(); if (pid < 0) return pr_perror("fork"); if (pid == 0) { char now_str[64]; char *cargv[] = {"exec", now_str, NULL}; char *cenv[] = {NULL}; /* Check that a child process is in the new timens. */ for (i = 0; i < 2; i++) { _gettime(CLOCK_MONOTONIC, &tst, i); if (abs(tst.tv_sec - now.tv_sec - OFFSET) > 5) return pr_fail("%ld %ld\n", now.tv_sec + OFFSET, tst.tv_sec); } /* Check for proper vvar offsets after execve. */ snprintf(now_str, sizeof(now_str), "%ld", now.tv_sec + OFFSET); execve("/proc/self/exe", cargv, cenv); return pr_perror("execve"); } if (waitpid(pid, &status, 0) != pid) return pr_perror("waitpid"); if (status) ksft_exit_fail(); ksft_test_result_pass("exec\n"); ksft_exit_pass(); return 0; }