1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 * Copyright (c) 2018 Mylne Josserand <mylene.josserand (at) bootlin.com> 4 * 5 */ 6 7 #include <stdio.h> 8 #include <unistd.h> 9 #include <string.h> 10 11 static void print_help(void) 12 { 13 printf("Usage: tst_getconf variable\n\n"); 14 printf(" variable: can be PAGESIZE/PAGE_SIZE"); 15 printf(" or _NPROCESSORS_ONLN (for the moment)\n\n"); 16 printf("example: tst_getconf PAGESIZE\n"); 17 } 18 19 int main(int argc, char *argv[]) 20 { 21 int opt; 22 23 while ((opt = getopt(argc, argv, ":h")) != -1) { 24 switch (opt) { 25 case 'h': 26 print_help(); 27 return 0; 28 default: 29 print_help(); 30 return 1; 31 } 32 } 33 34 if (argc != 2) { 35 print_help(); 36 return 1; 37 } 38 39 if (!strcmp(argv[optind], "_NPROCESSORS_ONLN")) { 40 printf("%ld\n", sysconf(_SC_NPROCESSORS_ONLN)); 41 } else if (!strcmp(argv[optind], "PAGESIZE") || 42 !strcmp(argv[optind], "PAGE_SIZE")) { 43 printf("%ld\n", sysconf(_SC_PAGE_SIZE)); 44 } else { 45 printf("tst_getconf: Unrecognized variable \'%s\'\n", 46 argv[optind]); 47 return -1; 48 } 49 50 return 0; 51 } 52
