| File: | initd/mkdev.c |
| Warning: | line 126, column 2 Address of stack memory associated with local variable 'pattern' is still referred to by the global variable 'patterns' upon returning to the caller. This will be a dangling reference |
Press '?' to see keyboard shortcuts
Keyboard shortcuts:
| 1 | /* | |||
| 2 | * Copyright (C) 2013 Felix Fietkau <nbd@openwrt.org> | |||
| 3 | * Copyright (C) 2013 John Crispin <blogic@openwrt.org> | |||
| 4 | * | |||
| 5 | * This program is free software; you can redistribute it and/or modify | |||
| 6 | * it under the terms of the GNU Lesser General Public License version 2.1 | |||
| 7 | * as published by the Free Software Foundation | |||
| 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 | ||||
| 15 | #define _DEFAULT_SOURCE1 | |||
| 16 | ||||
| 17 | #include <sys/stat.h> | |||
| 18 | #include <sys/types.h> | |||
| 19 | #include <sys/sysmacros.h> | |||
| 20 | ||||
| 21 | #include <stdio.h> | |||
| 22 | #include <string.h> | |||
| 23 | #include <stdlib.h> | |||
| 24 | #include <unistd.h> | |||
| 25 | #include <stdbool.h> | |||
| 26 | #include <dirent.h> | |||
| 27 | #include <limits.h> | |||
| 28 | #include <fnmatch.h> | |||
| 29 | ||||
| 30 | #include "init.h" | |||
| 31 | ||||
| 32 | static char **patterns; | |||
| 33 | static int n_patterns; | |||
| 34 | static char buf[PATH_MAX4096]; | |||
| 35 | static char buf2[PATH_MAX4096]; | |||
| 36 | static unsigned int mode = 0600; | |||
| 37 | ||||
| 38 | static bool_Bool find_pattern(const char *name) | |||
| 39 | { | |||
| 40 | int i; | |||
| 41 | ||||
| 42 | for (i = 0; i < n_patterns; i++) | |||
| 43 | if (!fnmatch(patterns[i], name, 0)) | |||
| 44 | return true1; | |||
| 45 | ||||
| 46 | return false0; | |||
| 47 | } | |||
| 48 | ||||
| 49 | static void make_dev(const char *path, bool_Bool block, int major, int minor) | |||
| 50 | { | |||
| 51 | unsigned int oldumask = umask(0); | |||
| 52 | unsigned int _mode = mode | (block ? S_IFBLK0060000 : S_IFCHR0020000); | |||
| 53 | ||||
| 54 | DEBUG(4, "Creating %s device %s(%d,%d)\n",do { if (debug >= 4) { ulog(5, "Creating %s device %s(%d,%d)\n" , block ? "block" : "character", path, major, minor); } } while (0) | |||
| 55 | block ? "block" : "character",do { if (debug >= 4) { ulog(5, "Creating %s device %s(%d,%d)\n" , block ? "block" : "character", path, major, minor); } } while (0) | |||
| 56 | path, major, minor)do { if (debug >= 4) { ulog(5, "Creating %s device %s(%d,%d)\n" , block ? "block" : "character", path, major, minor); } } while (0); | |||
| 57 | ||||
| 58 | mknod(path, _mode, makedev(major, minor)gnu_dev_makedev (major, minor)); | |||
| 59 | umask(oldumask); | |||
| 60 | } | |||
| 61 | ||||
| 62 | static void find_devs(bool_Bool block) | |||
| 63 | { | |||
| 64 | char *path = block ? "/sys/dev/block" : "/sys/dev/char"; | |||
| 65 | struct dirent *dp; | |||
| 66 | DIR *dir; | |||
| 67 | ||||
| 68 | dir = opendir(path); | |||
| 69 | if (!dir) | |||
| 70 | return; | |||
| 71 | ||||
| 72 | path = buf2 + sprintf(buf2, "%s/", path); | |||
| 73 | while ((dp = readdir(dir)) != NULL((void*)0)) { | |||
| 74 | char *c; | |||
| 75 | int major = 0, minor = 0; | |||
| 76 | int len; | |||
| 77 | ||||
| 78 | if (dp->d_type != DT_LNKDT_LNK) | |||
| 79 | continue; | |||
| 80 | ||||
| 81 | if (sscanf(dp->d_name, "%d:%d", &major, &minor) != 2) | |||
| 82 | continue; | |||
| 83 | ||||
| 84 | strcpy(path, dp->d_name); | |||
| 85 | len = readlink(buf2, buf, sizeof(buf)); | |||
| 86 | if (len <= 0) | |||
| 87 | continue; | |||
| 88 | ||||
| 89 | buf[len] = 0; | |||
| 90 | if (!find_pattern(buf)) | |||
| 91 | continue; | |||
| 92 | ||||
| 93 | c = strrchr(buf, '/'); | |||
| 94 | if (!c) | |||
| 95 | continue; | |||
| 96 | ||||
| 97 | c++; | |||
| 98 | make_dev(c, block, major, minor); | |||
| 99 | } | |||
| 100 | closedir(dir); | |||
| 101 | } | |||
| 102 | ||||
| 103 | static char *add_pattern(const char *name) | |||
| 104 | { | |||
| 105 | char *str = malloc(strlen(name) + 2); | |||
| 106 | ||||
| 107 | str[0] = '*'; | |||
| 108 | strcpy(str + 1, name); | |||
| 109 | return str; | |||
| 110 | } | |||
| 111 | ||||
| 112 | int mkdev(const char *name, int _mode) | |||
| 113 | { | |||
| 114 | char *pattern; | |||
| 115 | ||||
| 116 | if (chdir("/dev")) | |||
| ||||
| 117 | return 1; | |||
| 118 | ||||
| 119 | pattern = add_pattern(name); | |||
| 120 | patterns = &pattern; | |||
| 121 | mode = _mode; | |||
| 122 | n_patterns = 1; | |||
| 123 | find_devs(true1); | |||
| 124 | find_devs(false0); | |||
| 125 | free(pattern); | |||
| 126 | return chdir("/"); | |||
| ||||
| 127 | } |