crypto/dist/heimdal/lib/krb5/store_fd.c

   1 /*
   2  * Copyright (c) 1997 - 2004 Kungliga Tekniska Högskolan
   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
  37 __RCSID("$Heimdal: store_fd.c 17779 2006-06-30 21:23:19Z lha $"
  38         "$NetBSD$");
  39
  40 typedef struct fd_storage {
  41     int fd;
  42 } fd_storage;
  43
  44 #define FD(S) (((fd_storage*)(S)->data)->fd)
  45
  46 static ssize_t
  47 fd_fetch(krb5_storage * sp, void *data, size_t size)
  48 {
  49     return net_read(FD(sp), data, size);
  50 }
  51
  52 static ssize_t
  53 fd_store(krb5_storage * sp, const void *data, size_t size)
  54 {
  55     return net_write(FD(sp), data, size);
  56 }
  57
  58 static off_t
  59 fd_seek(krb5_storage * sp, off_t offset, int whence)
  60 {
  61     return lseek(FD(sp), offset, whence);
  62 }
  63
  64 static void
  65 fd_free(krb5_storage * sp)
  66 {
  67     close(FD(sp));
  68 }
  69
  70 krb5_storage * KRB5_LIB_FUNCTION
  71 krb5_storage_from_fd(int fd)
  72 {
  73     krb5_storage *sp;
  74
  75     fd = dup(fd);
  76     if (fd < 0)
  77         return NULL;
  78
  79     sp = malloc(sizeof(krb5_storage));
  80     if (sp == NULL) {
  81         close(fd);
  82         return NULL;
  83     }
  84
  85     sp->data = malloc(sizeof(fd_storage));
  86     if (sp->data == NULL) {
  87         close(fd);
  88         free(sp);
  89         return NULL;
  90     }
  91     sp->flags = 0;
  92     sp->eof_code = HEIM_ERR_EOF;
  93     FD(sp) = fd;
  94     sp->fetch = fd_fetch;
  95     sp->store = fd_store;
  96     sp->seek = fd_seek;
  97     sp->free = fd_free;
  98     return sp;
  99 }