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| 1 /* $LP: LPlib/source/LPdir_unix.c,v 1.11 2004/09/23 22:07:22 _cvs_levitte Exp $
*/ | |
| 2 /* | |
| 3 * Copyright (c) 2004, Richard Levitte <richard@levitte.org> | |
| 4 * All rights reserved. | |
| 5 * | |
| 6 * Redistribution and use in source and binary forms, with or without | |
| 7 * modification, are permitted provided that the following conditions | |
| 8 * are met: | |
| 9 * 1. Redistributions of source code must retain the above copyright | |
| 10 * notice, this list of conditions and the following disclaimer. | |
| 11 * 2. Redistributions in binary form must reproduce the above copyright | |
| 12 * notice, this list of conditions and the following disclaimer in the | |
| 13 * documentation and/or other materials provided with the distribution. | |
| 14 * | |
| 15 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS | |
| 16 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT | |
| 17 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR | |
| 18 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT | |
| 19 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, | |
| 20 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT | |
| 21 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, | |
| 22 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY | |
| 23 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | |
| 24 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE | |
| 25 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
| 26 */ | |
| 27 | |
| 28 #include <stddef.h> | |
| 29 #include <stdlib.h> | |
| 30 #include <limits.h> | |
| 31 #include <string.h> | |
| 32 #include <sys/types.h> | |
| 33 #include <dirent.h> | |
| 34 #include <errno.h> | |
| 35 #ifndef LPDIR_H | |
| 36 #include "LPdir.h" | |
| 37 #endif | |
| 38 | |
| 39 /* The POSIXly macro for the maximum number of characters in a file path | |
| 40 is NAME_MAX. However, some operating systems use PATH_MAX instead. | |
| 41 Therefore, it seems natural to first check for PATH_MAX and use that, | |
| 42 and if it doesn't exist, use NAME_MAX. */ | |
| 43 #if defined(PATH_MAX) | |
| 44 # define LP_ENTRY_SIZE PATH_MAX | |
| 45 #elif defined(NAME_MAX) | |
| 46 # define LP_ENTRY_SIZE NAME_MAX | |
| 47 #endif | |
| 48 | |
| 49 /* Of course, there's the possibility that neither PATH_MAX nor NAME_MAX | |
| 50 exist. It's also possible that NAME_MAX exists but is define to a | |
| 51 very small value (HP-UX offers 14), so we need to check if we got a | |
| 52 result, and if it meets a minimum standard, and create or change it | |
| 53 if not. */ | |
| 54 #if !defined(LP_ENTRY_SIZE) || LP_ENTRY_SIZE<255 | |
| 55 # undef LP_ENTRY_SIZE | |
| 56 # define LP_ENTRY_SIZE 255 | |
| 57 #endif | |
| 58 | |
| 59 struct LP_dir_context_st | |
| 60 { | |
| 61 DIR *dir; | |
| 62 char entry_name[LP_ENTRY_SIZE+1]; | |
| 63 }; | |
| 64 | |
| 65 const char *LP_find_file(LP_DIR_CTX **ctx, const char *directory) | |
| 66 { | |
| 67 struct dirent *direntry = NULL; | |
| 68 | |
| 69 if (ctx == NULL || directory == NULL) | |
| 70 { | |
| 71 errno = EINVAL; | |
| 72 return 0; | |
| 73 } | |
| 74 | |
| 75 errno = 0; | |
| 76 if (*ctx == NULL) | |
| 77 { | |
| 78 *ctx = (LP_DIR_CTX *)malloc(sizeof(LP_DIR_CTX)); | |
| 79 if (*ctx == NULL) | |
| 80 { | |
| 81 errno = ENOMEM; | |
| 82 return 0; | |
| 83 } | |
| 84 memset(*ctx, '\0', sizeof(LP_DIR_CTX)); | |
| 85 | |
| 86 (*ctx)->dir = opendir(directory); | |
| 87 if ((*ctx)->dir == NULL) | |
| 88 { | |
| 89 int save_errno = errno; /* Probably not needed, but I'm paranoid */ | |
| 90 free(*ctx); | |
| 91 *ctx = NULL; | |
| 92 errno = save_errno; | |
| 93 return 0; | |
| 94 } | |
| 95 } | |
| 96 | |
| 97 direntry = readdir((*ctx)->dir); | |
| 98 if (direntry == NULL) | |
| 99 { | |
| 100 return 0; | |
| 101 } | |
| 102 | |
| 103 strncpy((*ctx)->entry_name, direntry->d_name, sizeof((*ctx)->entry_name) - 1); | |
| 104 (*ctx)->entry_name[sizeof((*ctx)->entry_name) - 1] = '\0'; | |
| 105 return (*ctx)->entry_name; | |
| 106 } | |
| 107 | |
| 108 int LP_find_file_end(LP_DIR_CTX **ctx) | |
| 109 { | |
| 110 if (ctx != NULL && *ctx != NULL) | |
| 111 { | |
| 112 int ret = closedir((*ctx)->dir); | |
| 113 | |
| 114 free(*ctx); | |
| 115 switch (ret) | |
| 116 { | |
| 117 case 0: | |
| 118 return 1; | |
| 119 case -1: | |
| 120 return 0; | |
| 121 default: | |
| 122 break; | |
| 123 } | |
| 124 } | |
| 125 errno = EINVAL; | |
| 126 return 0; | |
| 127 } | |
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Chromium Code Reviews
Issue 2072073002:
Delete bundled copy of OpenSSL and replace with README. (Closed)
Base URL: https://chromium.googlesource.com/chromium/deps/openssl@master