diff options
Diffstat (limited to 'crypto/openssl/crypto/LPdir_unix.c')
-rw-r--r-- | crypto/openssl/crypto/LPdir_unix.c | 127 |
1 files changed, 127 insertions, 0 deletions
diff --git a/crypto/openssl/crypto/LPdir_unix.c b/crypto/openssl/crypto/LPdir_unix.c new file mode 100644 index 0000000..b004cd9 --- /dev/null +++ b/crypto/openssl/crypto/LPdir_unix.c @@ -0,0 +1,127 @@ +/* $LP: LPlib/source/LPdir_unix.c,v 1.11 2004/09/23 22:07:22 _cvs_levitte Exp $ */ +/* + * Copyright (c) 2004, Richard Levitte <richard@levitte.org> + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR + * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT + * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, + * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT + * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, + * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY + * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + */ + +#include <stddef.h> +#include <stdlib.h> +#include <limits.h> +#include <string.h> +#include <sys/types.h> +#include <dirent.h> +#include <errno.h> +#ifndef LPDIR_H +#include "LPdir.h" +#endif + +/* The POSIXly macro for the maximum number of characters in a file path + is NAME_MAX. However, some operating systems use PATH_MAX instead. + Therefore, it seems natural to first check for PATH_MAX and use that, + and if it doesn't exist, use NAME_MAX. */ +#if defined(PATH_MAX) +# define LP_ENTRY_SIZE PATH_MAX +#elif defined(NAME_MAX) +# define LP_ENTRY_SIZE NAME_MAX +#endif + +/* Of course, there's the possibility that neither PATH_MAX nor NAME_MAX + exist. It's also possible that NAME_MAX exists but is define to a + very small value (HP-UX offers 14), so we need to check if we got a + result, and if it meets a minimum standard, and create or change it + if not. */ +#if !defined(LP_ENTRY_SIZE) || LP_ENTRY_SIZE<255 +# undef LP_ENTRY_SIZE +# define LP_ENTRY_SIZE 255 +#endif + +struct LP_dir_context_st +{ + DIR *dir; + char entry_name[LP_ENTRY_SIZE+1]; +}; + +const char *LP_find_file(LP_DIR_CTX **ctx, const char *directory) +{ + struct dirent *direntry = NULL; + + if (ctx == NULL || directory == NULL) + { + errno = EINVAL; + return 0; + } + + errno = 0; + if (*ctx == NULL) + { + *ctx = (LP_DIR_CTX *)malloc(sizeof(LP_DIR_CTX)); + if (*ctx == NULL) + { + errno = ENOMEM; + return 0; + } + memset(*ctx, '\0', sizeof(LP_DIR_CTX)); + + (*ctx)->dir = opendir(directory); + if ((*ctx)->dir == NULL) + { + int save_errno = errno; /* Probably not needed, but I'm paranoid */ + free(*ctx); + *ctx = NULL; + errno = save_errno; + return 0; + } + } + + direntry = readdir((*ctx)->dir); + if (direntry == NULL) + { + return 0; + } + + strncpy((*ctx)->entry_name, direntry->d_name, sizeof((*ctx)->entry_name) - 1); + (*ctx)->entry_name[sizeof((*ctx)->entry_name) - 1] = '\0'; + return (*ctx)->entry_name; +} + +int LP_find_file_end(LP_DIR_CTX **ctx) +{ + if (ctx != NULL && *ctx != NULL) + { + int ret = closedir((*ctx)->dir); + + free(*ctx); + switch (ret) + { + case 0: + return 1; + case -1: + return 0; + default: + break; + } + } + errno = EINVAL; + return 0; +} |