1/* 2 * Copyright (c) 1997 - 2004 Kungliga Tekniska H��gskolan 3 * (Royal Institute of Technology, Stockholm, Sweden). 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 * 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 17 * 3. Neither the name of the Institute nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 */ 33 34#include "krb5_locl.h" 35#include "store-int.h" 36 37typedef struct fd_storage { 38 int fd; 39} fd_storage; 40 41#define FD(S) (((fd_storage*)(S)->data)->fd) 42 43static ssize_t 44fd_fetch(krb5_storage * sp, void *data, size_t size) 45{ 46 return net_read(FD(sp), data, size); 47} 48 49static ssize_t 50fd_store(krb5_storage * sp, const void *data, size_t size) 51{ 52 return net_write(FD(sp), data, size); 53} 54 55static off_t 56fd_seek(krb5_storage * sp, off_t offset, int whence) 57{ 58 return lseek(FD(sp), offset, whence); 59} 60 61static int 62fd_trunc(krb5_storage * sp, off_t offset) 63{ 64 if (ftruncate(FD(sp), offset) == -1) 65 return errno; 66 return 0; 67} 68 69static void 70fd_free(krb5_storage * sp) 71{ 72 close(FD(sp)); 73} 74 75/** 76 * 77 * 78 * @return A krb5_storage on success, or NULL on out of memory error. 79 * 80 * @ingroup krb5_storage 81 * 82 * @sa krb5_storage_emem() 83 * @sa krb5_storage_from_mem() 84 * @sa krb5_storage_from_readonly_mem() 85 * @sa krb5_storage_from_data() 86 */ 87 88krb5_storage * KRB5_LIB_FUNCTION 89krb5_storage_from_fd(int fd) 90{ 91 krb5_storage *sp; 92 93 fd = dup(fd); 94 if (fd < 0) 95 return NULL; 96 97 sp = malloc(sizeof(krb5_storage)); 98 if (sp == NULL) { 99 close(fd); 100 return NULL; 101 } 102 103 sp->data = malloc(sizeof(fd_storage)); 104 if (sp->data == NULL) { 105 close(fd); 106 free(sp); 107 return NULL; 108 } 109 sp->flags = 0; 110 sp->eof_code = HEIM_ERR_EOF; 111 FD(sp) = fd; 112 sp->fetch = fd_fetch; 113 sp->store = fd_store; 114 sp->seek = fd_seek; 115 sp->trunc = fd_trunc; 116 sp->free = fd_free; 117 return sp; 118} 119