// SPDX-License-Identifier: GPL-2.0 /* kselftest for acct() system call * The acct() system call enables or disables process accounting. */ #include <stdio.h> #include <errno.h> #include <string.h> #include <sys/wait.h> #include "kselftest.h" int main(void) { char filename[] = "process_log"; FILE *fp; pid_t child_pid; int sz; // Setting up kselftest framework ksft_print_header(); ksft_set_plan(1); // Check if test is run a root if (geteuid()) { ksft_exit_skip("This test needs root to run!\n"); return 1; } // Create file to log closed processes fp = fopen(filename, "w"); if (!fp) { ksft_test_result_error("%s.\n", strerror(errno)); ksft_finished(); return 1; } acct(filename); // Handle error conditions if (errno) { ksft_test_result_error("%s.\n", strerror(errno)); fclose(fp); ksft_finished(); return 1; } // Create child process and wait for it to terminate. child_pid = fork(); if (child_pid < 0) { ksft_test_result_error("Creating a child process to log failed\n"); acct(NULL); return 1; } else if (child_pid > 0) { wait(NULL); fseek(fp, 0L, SEEK_END); sz = ftell(fp); acct(NULL); if (sz <= 0) { ksft_test_result_fail("Terminated child process not logged\n"); ksft_exit_fail(); return 1; } ksft_test_result_pass("Successfully logged terminated process.\n"); fclose(fp); ksft_exit_pass(); return 0; } return 1; }