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1 /*- |
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2 * © Portions copyright (c) 2006 Nokia Corporation. All rights reserved. |
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3 * Copyright (c) 1995, 1996, 1997, 1998, 1999 Kungliga Tekniska Högskolan |
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4 * (Royal Institute of Technology, Stockholm, Sweden). |
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5 * All rights reserved. |
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6 * |
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7 * Redistribution and use in source and binary forms, with or without |
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8 * modification, are permitted provided that the following conditions |
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9 * are met: |
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10 * |
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11 * 1. Redistributions of source code must retain the above copyright |
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12 * notice, this list of conditions and the following disclaimer. |
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13 * |
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14 * 2. Redistributions in binary form must reproduce the above copyright |
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15 * notice, this list of conditions and the following disclaimer in the |
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16 * documentation and/or other materials provided with the distribution. |
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17 * |
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18 * 3. Neither the name of the Institute nor the names of its contributors |
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19 * may be used to endorse or promote products derived from this software |
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20 * without specific prior written permission. |
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21 * |
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22 * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND |
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23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
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25 * ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE |
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26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
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27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
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28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
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29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
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30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
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31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
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32 * SUCH DAMAGE. |
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33 */ |
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34 |
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35 #ifndef __SYMBIAN32__ |
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36 #ifdef HAVE_CONFIG_H |
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37 #include <config.h> |
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38 RCSID("$Id: readv.c,v 1.1.2.1.2.4 2006/11/23 11:59:59 sivanand Exp $"); |
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39 #endif |
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40 |
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41 #include "roken.h" |
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42 |
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43 #endif |
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44 |
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45 #include <sys/types.h> |
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46 #include <sys/uio.h> |
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47 #include <unistd.h> |
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48 #include <stdlib.h> |
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49 #include <errno.h> |
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50 #include <string.h> |
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51 #include <sys/syslimits.h> |
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52 |
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53 #define min(X , Y) ((X) < (Y) ? (X) :(Y) ) |
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54 |
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55 |
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56 EXPORT_C ssize_t |
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57 readv(int d, const struct iovec *iov, int iovcnt) |
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58 { |
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59 ssize_t ret, nb; |
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60 size_t tot = 0; |
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61 int VecIter = 0 ; |
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62 char *buf, *p; |
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63 |
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64 if(iovcnt > IOV_MAX) |
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65 { |
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66 errno = EINVAL ; |
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67 return -1 ; |
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68 } |
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69 if(iovcnt < 0 ) |
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70 { |
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71 errno = EINVAL ; |
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72 return -1 ; |
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73 } |
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74 |
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75 for(VecIter = 0; VecIter < iovcnt ; ++VecIter) |
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76 { |
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77 if(iov[VecIter].iov_base == NULL) |
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78 { |
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79 if(VecIter != 0) |
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80 { |
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81 break ; //Break from the for loop |
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82 } |
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83 errno = EFAULT ; |
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84 return -1 ; |
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85 } |
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86 if((int)iov[VecIter].iov_len >= 0 ) |
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87 { |
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88 tot += iov[VecIter].iov_len; |
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89 } |
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90 |
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91 else |
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92 { |
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93 errno = EINVAL ; |
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94 return -1 ; |
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95 } |
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96 |
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97 } |
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98 |
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99 buf = malloc(tot); |
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100 |
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101 if (tot != 0 && buf == NULL) { |
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102 errno = ENOMEM; |
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103 return -1; |
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104 } |
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105 |
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106 nb = ret = read (d, buf, tot); |
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107 p = buf; |
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108 |
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109 while (nb > 0) { |
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110 ssize_t cnt = min(nb, iov->iov_len); |
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111 memcpy (iov->iov_base, p, cnt); |
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112 p += cnt; |
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113 nb -= cnt; |
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114 iov += 1 ; //Newly added |
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115 } |
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116 free(buf); |
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117 return ret; |
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118 } |
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119 |