Mercurial > dovecot > original-hg > dovecot-1.2

annotate src/lib/sendfile-util.c @ 1329:ae229b7acb4c HEAD

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Mailbox names are now sent through imap-quoter instead of just escaping it. This means that mailbox names that would require escapes are instead sent as literals now.
author Timo Sirainen <tss@iki.fi>
date Wed, 02 Apr 2003 05:05:38 +0300
parents 69d922a1d051
children 04b81672c3a3
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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58
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1 /* kludge a bit to remove _FILE_OFFSET_BITS definition from config.h.
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2 It's required to be able to include sys/sendfile.h with Linux. */
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3 #include "../../config.h"
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4 #undef HAVE_CONFIG_H
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5
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6 #ifdef HAVE_LINUX_SENDFILE
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7 # undef _FILE_OFFSET_BITS
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8 #endif
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9
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10 #include "lib.h"
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11 #include "sendfile-util.h"
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12
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13 #ifdef HAVE_LINUX_SENDFILE
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14
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15 #include <sys/sendfile.h>
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16
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17 ssize_t safe_sendfile(int out_fd, int in_fd, uoff_t *offset, size_t count)
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18 {
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19 /* REMEBER: uoff_t and off_t may not be of same size. */
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20 off_t safe_offset;
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21 ssize_t ret;
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22
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23 /* make sure given offset fits into off_t */
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24 if (sizeof(off_t) * CHAR_BIT == 32) {
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25 /* 32bit off_t */
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26 if (*offset >= 2147483647L) {
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27 errno = EINVAL;
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28 return -1;
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29 }
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30 if (count > 2147483647L - *offset)
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31 count = 2147483647L - *offset;
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32 } else {
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33 /* they're most likely the same size. if not, fix this
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34 code later */
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35 i_assert(sizeof(off_t) == sizeof(uoff_t));
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36
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37 if (*offset >= OFF_T_MAX) {
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38 errno = EINVAL;
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39 return -1;
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40 }
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41 if (count > OFF_T_MAX - *offset)
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42 count = OFF_T_MAX - *offset;
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43 }
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44
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45 safe_offset = (off_t)*offset;
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46 ret = sendfile(out_fd, in_fd, &safe_offset, count);
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47 *offset = (uoff_t)safe_offset;
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48
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49 return ret;
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50 }
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51
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52 #elif defined(HAVE_FREEBSD_SENDFILE)
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53
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54 #include <sys/socket.h>
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55 #include <sys/uio.h>
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56
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57 ssize_t safe_sendfile(int out_fd, int in_fd, uoff_t *offset, size_t count)
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58 {
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59 struct sf_hdtr hdtr;
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60 off_t sbytes;
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61 int ret;
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62
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63 i_assert(count <= SSIZE_T_MAX);
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64
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65 memset(&hdtr, 0, sizeof(hdtr));
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66 ret = sendfile(in_fd, out_fd, *offset, count, &hdtr, &sbytes, 0);
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67
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68 *offset += sbytes;
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69
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70 if (ret == 0 || (ret == 0 && errno == EAGAIN && sbytes > 0))
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71 return (ssize_t)sbytes;
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72 else {
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73 if (errno == ENOTSOCK) {
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74 /* out_fd wasn't a socket. behave as if sendfile()
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75 wasn't supported at all. */
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76 errno = EINVAL;
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77 }
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78 return -1;
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79 }
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80 }
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81
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82 #elif defined (HAVE_SOLARIS_SENDFILEV)
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83
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84 #include <sys/sendfile.h>
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85 #include "network.h"
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86
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87 ssize_t safe_sendfile(int out_fd, int in_fd, uoff_t *offset, size_t count)
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88 {
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89 struct sendfilevec vec;
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90 size_t sbytes;
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91 ssize_t ret;
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92
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93 i_assert(count <= SSIZE_T_MAX);
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94
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95 /* outfd must be socket, or at least some Solaris versions will
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96 kernel panic */
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97 if (net_getsockname(out_fd, NULL, NULL) < 0) {
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98 errno = EINVAL;
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99 return -1;
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100 }
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101
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102 vec.sfv_fd = in_fd;
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103 vec.sfv_flag = 0;
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104 vec.sfv_off = *offset;
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105 vec.sfv_len = count;
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106
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107 ret = sendfilev(out_fd, &vec, 1, &sbytes);
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108
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109 *offset += sbytes;
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110
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111 if (ret >= 0 || (ret < 0 && errno == EAGAIN && sbytes > 0))
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112 return (ssize_t)sbytes;
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113 else
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114 return -1;
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115 }
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116
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117 #else
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118 ssize_t safe_sendfile(int out_fd __attr_unused__, int in_fd __attr_unused__,
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119 uoff_t *offset __attr_unused__,
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120 size_t count __attr_unused__)
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121 {
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122 errno = EINVAL;
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123 return -1;
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124 }
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125
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126 #endif