1 /* 2 * Copyright (c) 2012-2016 Cyril Hrubis <chrubis@suse.cz> 3 * 4 * This program is free software: you can redistribute it and/or modify 5 * it under the terms of the GNU General Public License as published by 6 * the Free Software Foundation, either version 2 of the License, or 7 * (at your option) any later version. 8 * 9 * This program is distributed in the hope that it will be useful, 10 * but WITHOUT ANY WARRANTY; without even the implied warranty of 11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 12 * GNU General Public License for more details. 13 * 14 * You should have received a copy of the GNU General Public License 15 * along with this program. If not, see <http://www.gnu.org/licenses/>. 16 */ 17 18 #ifndef SAFE_FILE_OPS_FN 19 #define SAFE_FILE_OPS_FN 20 21 #include <sys/stat.h> 22 #include <time.h> 23 24 #include "lapi/utime.h" 25 26 /* 27 * All-in-one function to scanf value(s) from a file. 28 */ 29 int file_scanf(const char *file, const int lineno, 30 const char *path, const char *fmt, ...) 31 __attribute__ ((format (scanf, 4, 5))); 32 33 void safe_file_scanf(const char *file, const int lineno, 34 void (*cleanup_fn)(void), 35 const char *path, const char *fmt, ...) 36 __attribute__ ((format (scanf, 5, 6))); 37 38 int file_lines_scanf(const char *file, const int lineno, 39 void (*cleanup_fn)(void), int strict, 40 const char *path, const char *fmt, ...) 41 __attribute__ ((format (scanf, 6, 7))); 42 43 /* 44 * All-in-one function that lets you printf directly into a file. 45 */ 46 int file_printf(const char *file, const int lineno, 47 const char *path, const char *fmt, ...) 48 __attribute__ ((format (printf, 4, 5))); 49 50 void safe_file_printf(const char *file, const int lineno, 51 void (*cleanup_fn)(void), 52 const char *path, const char *fmt, ...) 53 __attribute__ ((format (printf, 5, 6))); 54 55 /* 56 * Safe function to copy files, no more system("cp ...") please. 57 */ 58 void safe_cp(const char *file, const int lineno, 59 void (*cleanup_fn)(void), 60 const char *src, const char *dst); 61 62 /* 63 * Safe function to touch a file. 64 * 65 * If the file (pathname) does not exist It will be created with 66 * the specified permission (mode) and the access/modification times (times). 67 * 68 * If mode is 0 then the file is created with (0666 & ~umask) 69 * permission or (if the file exists) the permission is not changed. 70 * 71 * times is a timespec[2] (as for utimensat(2)). If times is NULL then 72 * the access/modification times of the file is set to the current time. 73 */ 74 void safe_touch(const char *file, const int lineno, 75 void (*cleanup_fn)(void), 76 const char *pathname, 77 mode_t mode, const struct timespec times[2]); 78 79 /* helper functions to setup overlayfs mountpoint */ 80 void create_overlay_dirs(void); 81 int mount_overlay(const char *file, const int lineno, int skip); 82 83 #endif /* SAFE_FILE_OPS_FN */ 84