94 lines · c
1// SPDX-License-Identifier: GPL-2.02#define _GNU_SOURCE3#include <errno.h>4#include <fcntl.h>5#include <sched.h>6#include <stdio.h>7#include <stdbool.h>8#include <sys/stat.h>9#include <sys/syscall.h>10#include <sys/types.h>11#include <sys/wait.h>12#include <time.h>13#include <unistd.h>14#include <string.h>15 16#include "log.h"17#include "timens.h"18 19#define OFFSET (36000)20 21int main(int argc, char *argv[])22{23 struct timespec now, tst;24 int status, i;25 pid_t pid;26 27 if (argc > 1) {28 if (sscanf(argv[1], "%ld", &now.tv_sec) != 1)29 return pr_perror("sscanf");30 31 for (i = 0; i < 2; i++) {32 _gettime(CLOCK_MONOTONIC, &tst, i);33 if (labs(tst.tv_sec - now.tv_sec) > 5)34 return pr_fail("%ld %ld\n", now.tv_sec, tst.tv_sec);35 }36 return 0;37 }38 39 nscheck();40 41 ksft_set_plan(1);42 43 clock_gettime(CLOCK_MONOTONIC, &now);44 45 if (unshare_timens())46 return 1;47 48 if (_settime(CLOCK_MONOTONIC, OFFSET))49 return 1;50 51 for (i = 0; i < 2; i++) {52 _gettime(CLOCK_MONOTONIC, &tst, i);53 if (labs(tst.tv_sec - now.tv_sec) > 5)54 return pr_fail("%ld %ld\n",55 now.tv_sec, tst.tv_sec);56 }57 58 if (argc > 1)59 return 0;60 61 pid = fork();62 if (pid < 0)63 return pr_perror("fork");64 65 if (pid == 0) {66 char now_str[64];67 char *cargv[] = {"exec", now_str, NULL};68 char *cenv[] = {NULL};69 70 /* Check that a child process is in the new timens. */71 for (i = 0; i < 2; i++) {72 _gettime(CLOCK_MONOTONIC, &tst, i);73 if (labs(tst.tv_sec - now.tv_sec - OFFSET) > 5)74 return pr_fail("%ld %ld\n",75 now.tv_sec + OFFSET, tst.tv_sec);76 }77 78 /* Check for proper vvar offsets after execve. */79 snprintf(now_str, sizeof(now_str), "%ld", now.tv_sec + OFFSET);80 execve("/proc/self/exe", cargv, cenv);81 return pr_perror("execve");82 }83 84 if (waitpid(pid, &status, 0) != pid)85 return pr_perror("waitpid");86 87 if (status)88 ksft_exit_fail();89 90 ksft_test_result_pass("exec\n");91 ksft_exit_pass();92 return 0;93}94