1 /* 2 * SPDX-License-Identifier: GPL-2.0-or-later 3 * 4 * Copyright (c) 2018 Jan Stancek <jstancek (at) redhat.com> 5 */ 6 7 #include <limits.h> 8 #include <stdio.h> 9 #include <unistd.h> 10 11 #define TST_NO_DEFAULT_MAIN 12 #include "tst_test.h" 13 #include "tst_sys_conf.h" 14 15 static struct tst_sys_conf *save_restore_data; 16 17 void tst_sys_conf_dump(void) 18 { 19 struct tst_sys_conf *i; 20 21 for (i = save_restore_data; i; i = i->next) 22 tst_res(TINFO, "%s = %s", i->path, i->value); 23 } 24 25 int tst_sys_conf_save_str(const char *path, const char *value) 26 { 27 struct tst_sys_conf *n = SAFE_MALLOC(sizeof(*n)); 28 29 strncpy(n->path, path, sizeof(n->path)); 30 strncpy(n->value, value, sizeof(n->value)); 31 32 n->next = save_restore_data; 33 save_restore_data = n; 34 35 return 0; 36 } 37 38 int tst_sys_conf_save(const char *path) 39 { 40 char line[PATH_MAX]; 41 FILE *fp; 42 void *ret; 43 char flag; 44 45 if (!path) 46 tst_brk(TBROK, "path is empty"); 47 48 flag = path[0]; 49 if (flag == '?' || flag == '!') 50 path++; 51 52 if (access(path, F_OK) != 0) { 53 switch (flag) { 54 case '?': 55 tst_res(TINFO, "Path not found: '%s'", path); 56 break; 57 case '!': 58 tst_brk(TBROK|TERRNO, "Path not found: '%s'", path); 59 break; 60 default: 61 tst_brk(TCONF|TERRNO, "Path not found: '%s'", path); 62 } 63 return 1; 64 } 65 66 fp = fopen(path, "r"); 67 if (fp == NULL) { 68 tst_brk(TBROK | TERRNO, "Failed to open FILE '%s' for reading", 69 path); 70 return 1; 71 } 72 73 ret = fgets(line, sizeof(line), fp); 74 fclose(fp); 75 76 if (ret == NULL) { 77 tst_brk(TBROK | TERRNO, "Failed to read anything from '%s'", 78 path); 79 } 80 81 return tst_sys_conf_save_str(path, line); 82 } 83 84 void tst_sys_conf_restore(int verbose) 85 { 86 struct tst_sys_conf *i; 87 88 for (i = save_restore_data; i; i = i->next) { 89 if (verbose) { 90 tst_res(TINFO, "Restoring conf.: %s -> %s\n", 91 i->path, i->value); 92 } 93 FILE_PRINTF(i->path, "%s", i->value); 94 } 95 } 96 97
