0
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1
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2 /*
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3 * Copyright (C) Igor Sysoev
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660
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4 * Copyright (C) Nginx, Inc.
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0
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5 */
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6
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7
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8 #include <ngx_config.h>
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9 #include <ngx_core.h>
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10
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11
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542
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12 #if (NGX_HAVE_FILE_AIO)
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13
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14 ngx_uint_t ngx_file_aio = 1;
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15
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16 #endif
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17
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18
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110
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19 ssize_t
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20 ngx_read_file(ngx_file_t *file, u_char *buf, size_t size, off_t offset)
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0
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21 {
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110
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22 ssize_t n;
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0
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23
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24 ngx_log_debug4(NGX_LOG_DEBUG_CORE, file->log, 0,
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10
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25 "read: %d, %p, %uz, %O", file->fd, buf, size, offset);
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0
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26
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18
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27 #if (NGX_HAVE_PREAD)
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0
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28
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29 n = pread(file->fd, buf, size, offset);
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30
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31 if (n == -1) {
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32 ngx_log_error(NGX_LOG_CRIT, file->log, ngx_errno,
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530
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33 "pread() \"%s\" failed", file->name.data);
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0
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34 return NGX_ERROR;
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35 }
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36
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37 #else
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38
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39 if (file->sys_offset != offset) {
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40 if (lseek(file->fd, offset, SEEK_SET) == -1) {
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530
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41 ngx_log_error(NGX_LOG_CRIT, file->log, ngx_errno,
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42 "lseek() \"%s\" failed", file->name.data);
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0
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43 return NGX_ERROR;
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44 }
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45
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46 file->sys_offset = offset;
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47 }
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48
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49 n = read(file->fd, buf, size);
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50
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51 if (n == -1) {
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530
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52 ngx_log_error(NGX_LOG_CRIT, file->log, ngx_errno,
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53 "read() \"%s\" failed", file->name.data);
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0
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54 return NGX_ERROR;
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55 }
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56
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57 file->sys_offset += n;
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58
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59 #endif
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60
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61 file->offset += n;
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62
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63 return n;
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64 }
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65
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66
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110
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67 ssize_t
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68 ngx_write_file(ngx_file_t *file, u_char *buf, size_t size, off_t offset)
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0
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69 {
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530
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70 ssize_t n, written;
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0
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71
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10
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72 ngx_log_debug4(NGX_LOG_DEBUG_CORE, file->log, 0,
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73 "write: %d, %p, %uz, %O", file->fd, buf, size, offset);
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74
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530
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75 written = 0;
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76
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18
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77 #if (NGX_HAVE_PWRITE)
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0
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78
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530
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79 for ( ;; ) {
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582
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80 n = pwrite(file->fd, buf + written, size, offset);
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530
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81
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82 if (n == -1) {
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83 ngx_log_error(NGX_LOG_CRIT, file->log, ngx_errno,
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84 "pwrite() \"%s\" failed", file->name.data);
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85 return NGX_ERROR;
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86 }
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0
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87
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530
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88 file->offset += n;
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89 written += n;
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0
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90
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530
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91 if ((size_t) n == size) {
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92 return written;
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93 }
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94
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95 offset += n;
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96 size -= n;
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0
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97 }
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98
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99 #else
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100
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101 if (file->sys_offset != offset) {
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102 if (lseek(file->fd, offset, SEEK_SET) == -1) {
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530
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103 ngx_log_error(NGX_LOG_CRIT, file->log, ngx_errno,
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104 "lseek() \"%s\" failed", file->name.data);
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0
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105 return NGX_ERROR;
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106 }
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107
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108 file->sys_offset = offset;
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109 }
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110
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530
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111 for ( ;; ) {
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582
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112 n = write(file->fd, buf + written, size);
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0
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113
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530
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114 if (n == -1) {
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115 ngx_log_error(NGX_LOG_CRIT, file->log, ngx_errno,
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116 "write() \"%s\" failed", file->name.data);
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117 return NGX_ERROR;
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118 }
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0
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119
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530
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120 file->offset += n;
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121 written += n;
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0
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122
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530
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123 if ((size_t) n == size) {
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124 return written;
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125 }
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0
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126
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530
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127 size -= n;
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128 }
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129 #endif
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0
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130 }
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131
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132
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110
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133 ngx_fd_t
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276
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134 ngx_open_tempfile(u_char *name, ngx_uint_t persistent, ngx_uint_t access)
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0
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135 {
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136 ngx_fd_t fd;
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137
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276
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138 fd = open((const char *) name, O_CREAT|O_EXCL|O_RDWR,
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139 access ? access : 0600);
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0
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140
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141 if (fd != -1 && !persistent) {
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684
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142 (void) unlink((const char *) name);
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0
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143 }
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144
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145 return fd;
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146 }
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147
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148
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10
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149 #define NGX_IOVS 8
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150
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110
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151 ssize_t
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152 ngx_write_chain_to_file(ngx_file_t *file, ngx_chain_t *cl, off_t offset,
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153 ngx_pool_t *pool)
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0
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154 {
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155 u_char *prev;
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156 size_t size;
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646
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157 ssize_t total, n;
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10
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158 ngx_array_t vec;
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159 struct iovec *iov, iovs[NGX_IOVS];
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0
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160
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10
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161 /* use pwrite() if there is the only buf in a chain */
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0
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162
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163 if (cl->next == NULL) {
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164 return ngx_write_file(file, cl->buf->pos,
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165 (size_t) (cl->buf->last - cl->buf->pos),
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166 offset);
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167 }
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168
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646
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169 total = 0;
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170
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10
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171 vec.elts = iovs;
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172 vec.size = sizeof(struct iovec);
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126
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173 vec.nalloc = NGX_IOVS;
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10
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174 vec.pool = pool;
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0
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175
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10
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176 do {
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177 prev = NULL;
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178 iov = NULL;
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179 size = 0;
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0
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180
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10
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181 vec.nelts = 0;
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182
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183 /* create the iovec and coalesce the neighbouring bufs */
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0
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184
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10
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185 while (cl && vec.nelts < IOV_MAX) {
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186 if (prev == cl->buf->pos) {
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187 iov->iov_len += cl->buf->last - cl->buf->pos;
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0
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188
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10
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189 } else {
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50
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190 iov = ngx_array_push(&vec);
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191 if (iov == NULL) {
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10
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192 return NGX_ERROR;
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193 }
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194
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195 iov->iov_base = (void *) cl->buf->pos;
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196 iov->iov_len = cl->buf->last - cl->buf->pos;
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197 }
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198
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199 size += cl->buf->last - cl->buf->pos;
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200 prev = cl->buf->last;
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201 cl = cl->next;
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0
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202 }
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203
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10
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204 /* use pwrite() if there is the only iovec buffer */
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0
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205
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10
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206 if (vec.nelts == 1) {
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207 iov = vec.elts;
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646
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208
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209 n = ngx_write_file(file, (u_char *) iov[0].iov_base,
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210 iov[0].iov_len, offset);
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211
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212 if (n == NGX_ERROR) {
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213 return n;
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214 }
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215
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216 return total + n;
|
10
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217 }
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0
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218
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10
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219 if (file->sys_offset != offset) {
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220 if (lseek(file->fd, offset, SEEK_SET) == -1) {
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221 ngx_log_error(NGX_LOG_CRIT, file->log, ngx_errno,
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530
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222 "lseek() \"%s\" failed", file->name.data);
|
10
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223 return NGX_ERROR;
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224 }
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0
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225
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10
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226 file->sys_offset = offset;
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227 }
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228
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229 n = writev(file->fd, vec.elts, vec.nelts);
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230
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231 if (n == -1) {
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232 ngx_log_error(NGX_LOG_CRIT, file->log, ngx_errno,
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530
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233 "writev() \"%s\" failed", file->name.data);
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0
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234 return NGX_ERROR;
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235 }
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236
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10
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237 if ((size_t) n != size) {
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238 ngx_log_error(NGX_LOG_CRIT, file->log, 0,
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530
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239 "writev() \"%s\" has written only %z of %uz",
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240 file->name.data, n, size);
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10
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241 return NGX_ERROR;
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242 }
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0
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243
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692
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244 ngx_log_debug2(NGX_LOG_DEBUG_CORE, file->log, 0,
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245 "writev: %d, %z", file->fd, n);
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246
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10
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247 file->sys_offset += n;
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248 file->offset += n;
|
692
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249 offset += n;
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646
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250 total += n;
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0
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251
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10
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252 } while (cl);
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0
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253
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646
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254 return total;
|
0
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255 }
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256
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257
|
110
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258 ngx_int_t
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230
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259 ngx_set_file_time(u_char *name, ngx_fd_t fd, time_t s)
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260 {
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261 struct timeval tv[2];
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262
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614
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263 tv[0].tv_sec = ngx_time();
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230
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264 tv[0].tv_usec = 0;
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265 tv[1].tv_sec = s;
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266 tv[1].tv_usec = 0;
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267
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268 if (utimes((char *) name, tv) != -1) {
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269 return NGX_OK;
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270 }
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271
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272 return NGX_ERROR;
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273 }
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274
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275
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276 ngx_int_t
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582
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277 ngx_create_file_mapping(ngx_file_mapping_t *fm)
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278 {
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279 fm->fd = ngx_open_file(fm->name, NGX_FILE_RDWR, NGX_FILE_TRUNCATE,
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280 NGX_FILE_DEFAULT_ACCESS);
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281 if (fm->fd == NGX_INVALID_FILE) {
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282 ngx_log_error(NGX_LOG_CRIT, fm->log, ngx_errno,
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283 ngx_open_file_n " \"%s\" failed", fm->name);
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284 return NGX_ERROR;
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285 }
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286
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287 if (ftruncate(fm->fd, fm->size) == -1) {
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288 ngx_log_error(NGX_LOG_CRIT, fm->log, ngx_errno,
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289 "ftruncate() \"%s\" failed", fm->name);
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290 goto failed;
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291 }
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292
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293 fm->addr = mmap(NULL, fm->size, PROT_READ|PROT_WRITE, MAP_SHARED,
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294 fm->fd, 0);
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295 if (fm->addr != MAP_FAILED) {
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296 return NGX_OK;
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297 }
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298
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299 ngx_log_error(NGX_LOG_CRIT, fm->log, ngx_errno,
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300 "mmap(%uz) \"%s\" failed", fm->size, fm->name);
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301
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302 failed:
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303
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304 if (ngx_close_file(fm->fd) == NGX_FILE_ERROR) {
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305 ngx_log_error(NGX_LOG_ALERT, fm->log, ngx_errno,
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306 ngx_close_file_n " \"%s\" failed", fm->name);
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307 }
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308
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309 return NGX_ERROR;
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310 }
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311
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312
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313 void
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314 ngx_close_file_mapping(ngx_file_mapping_t *fm)
|
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315 {
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316 if (munmap(fm->addr, fm->size) == -1) {
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317 ngx_log_error(NGX_LOG_CRIT, fm->log, ngx_errno,
|
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318 "munmap(%uz) \"%s\" failed", fm->size, fm->name);
|
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319 }
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320
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321 if (ngx_close_file(fm->fd) == NGX_FILE_ERROR) {
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322 ngx_log_error(NGX_LOG_ALERT, fm->log, ngx_errno,
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323 ngx_close_file_n " \"%s\" failed", fm->name);
|
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324 }
|
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325 }
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326
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327
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328 ngx_int_t
|
110
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329 ngx_open_dir(ngx_str_t *name, ngx_dir_t *dir)
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0
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330 {
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331 dir->dir = opendir((const char *) name->data);
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332
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333 if (dir->dir == NULL) {
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334 return NGX_ERROR;
|
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335 }
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336
|
6
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337 dir->valid_info = 0;
|
0
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338
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339 return NGX_OK;
|
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340 }
|
110
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341
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342
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238
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343 ngx_int_t
|
406
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344 ngx_read_dir(ngx_dir_t *dir)
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345 {
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346 dir->de = readdir(dir->dir);
|
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347
|
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348 if (dir->de) {
|
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349 #if (NGX_HAVE_D_TYPE)
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350 dir->type = dir->de->d_type;
|
456
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351 #else
|
536
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352 dir->type = 0;
|
406
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353 #endif
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354 return NGX_OK;
|
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355 }
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356
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357 return NGX_ERROR;
|
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358 }
|
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359
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360
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361 ngx_int_t
|
238
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362 ngx_open_glob(ngx_glob_t *gl)
|
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363 {
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372
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364 int n;
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365
|
694
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366 n = glob((char *) gl->pattern, 0, NULL, &gl->pglob);
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372
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367
|
|
368 if (n == 0) {
|
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369 return NGX_OK;
|
|
370 }
|
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371
|
400
|
372 #ifdef GLOB_NOMATCH
|
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373
|
372
|
374 if (n == GLOB_NOMATCH && gl->test) {
|
238
|
375 return NGX_OK;
|
|
376 }
|
|
377
|
400
|
378 #endif
|
|
379
|
238
|
380 return NGX_ERROR;
|
|
381 }
|
|
382
|
|
383
|
|
384 ngx_int_t
|
|
385 ngx_read_glob(ngx_glob_t *gl, ngx_str_t *name)
|
|
386 {
|
402
|
387 size_t count;
|
|
388
|
|
389 #ifdef GLOB_NOMATCH
|
|
390 count = (size_t) gl->pglob.gl_pathc;
|
|
391 #else
|
|
392 count = (size_t) gl->pglob.gl_matchc;
|
|
393 #endif
|
|
394
|
|
395 if (gl->n < count) {
|
238
|
396
|
|
397 name->len = (size_t) ngx_strlen(gl->pglob.gl_pathv[gl->n]);
|
|
398 name->data = (u_char *) gl->pglob.gl_pathv[gl->n];
|
|
399 gl->n++;
|
|
400
|
|
401 return NGX_OK;
|
|
402 }
|
|
403
|
|
404 return NGX_DONE;
|
|
405 }
|
|
406
|
|
407
|
|
408 void
|
|
409 ngx_close_glob(ngx_glob_t *gl)
|
|
410 {
|
|
411 globfree(&gl->pglob);
|
|
412 }
|
|
413
|
|
414
|
160
|
415 ngx_err_t
|
|
416 ngx_trylock_fd(ngx_fd_t fd)
|
110
|
417 {
|
|
418 struct flock fl;
|
|
419
|
680
|
420 ngx_memzero(&fl, sizeof(struct flock));
|
160
|
421 fl.l_type = F_WRLCK;
|
110
|
422 fl.l_whence = SEEK_SET;
|
160
|
423
|
|
424 if (fcntl(fd, F_SETLK, &fl) == -1) {
|
|
425 return ngx_errno;
|
|
426 }
|
|
427
|
|
428 return 0;
|
|
429 }
|
|
430
|
|
431
|
|
432 ngx_err_t
|
|
433 ngx_lock_fd(ngx_fd_t fd)
|
|
434 {
|
|
435 struct flock fl;
|
|
436
|
680
|
437 ngx_memzero(&fl, sizeof(struct flock));
|
110
|
438 fl.l_type = F_WRLCK;
|
160
|
439 fl.l_whence = SEEK_SET;
|
110
|
440
|
160
|
441 if (fcntl(fd, F_SETLKW, &fl) == -1) {
|
|
442 return ngx_errno;
|
110
|
443 }
|
|
444
|
160
|
445 return 0;
|
110
|
446 }
|
|
447
|
|
448
|
160
|
449 ngx_err_t
|
|
450 ngx_unlock_fd(ngx_fd_t fd)
|
110
|
451 {
|
|
452 struct flock fl;
|
|
453
|
680
|
454 ngx_memzero(&fl, sizeof(struct flock));
|
110
|
455 fl.l_type = F_UNLCK;
|
160
|
456 fl.l_whence = SEEK_SET;
|
110
|
457
|
160
|
458 if (fcntl(fd, F_SETLK, &fl) == -1) {
|
|
459 return ngx_errno;
|
110
|
460 }
|
|
461
|
160
|
462 return 0;
|
110
|
463 }
|
390
|
464
|
|
465
|
650
|
466 #if (NGX_HAVE_POSIX_FADVISE) && !(NGX_HAVE_F_READAHEAD)
|
546
|
467
|
|
468 ngx_int_t
|
|
469 ngx_read_ahead(ngx_fd_t fd, size_t n)
|
|
470 {
|
|
471 int err;
|
|
472
|
|
473 err = posix_fadvise(fd, 0, 0, POSIX_FADV_SEQUENTIAL);
|
|
474
|
|
475 if (err == 0) {
|
|
476 return 0;
|
|
477 }
|
|
478
|
|
479 ngx_set_errno(err);
|
|
480 return NGX_FILE_ERROR;
|
|
481 }
|
|
482
|
|
483 #endif
|
|
484
|
|
485
|
390
|
486 #if (NGX_HAVE_O_DIRECT)
|
|
487
|
|
488 ngx_int_t
|
410
|
489 ngx_directio_on(ngx_fd_t fd)
|
390
|
490 {
|
|
491 int flags;
|
|
492
|
|
493 flags = fcntl(fd, F_GETFL);
|
|
494
|
|
495 if (flags == -1) {
|
530
|
496 return NGX_FILE_ERROR;
|
390
|
497 }
|
|
498
|
|
499 return fcntl(fd, F_SETFL, flags | O_DIRECT);
|
|
500 }
|
|
501
|
410
|
502
|
|
503 ngx_int_t
|
|
504 ngx_directio_off(ngx_fd_t fd)
|
|
505 {
|
|
506 int flags;
|
|
507
|
|
508 flags = fcntl(fd, F_GETFL);
|
|
509
|
|
510 if (flags == -1) {
|
530
|
511 return NGX_FILE_ERROR;
|
410
|
512 }
|
|
513
|
|
514 return fcntl(fd, F_SETFL, flags & ~O_DIRECT);
|
|
515 }
|
|
516
|
390
|
517 #endif
|
468
|
518
|
|
519
|
|
520 #if (NGX_HAVE_STATFS)
|
|
521
|
|
522 size_t
|
|
523 ngx_fs_bsize(u_char *name)
|
|
524 {
|
|
525 struct statfs fs;
|
|
526
|
|
527 if (statfs((char *) name, &fs) == -1) {
|
|
528 return 512;
|
|
529 }
|
|
530
|
|
531 if ((fs.f_bsize % 512) != 0) {
|
|
532 return 512;
|
|
533 }
|
|
534
|
|
535 return (size_t) fs.f_bsize;
|
|
536 }
|
|
537
|
|
538 #elif (NGX_HAVE_STATVFS)
|
|
539
|
|
540 size_t
|
|
541 ngx_fs_bsize(u_char *name)
|
|
542 {
|
|
543 struct statvfs fs;
|
|
544
|
|
545 if (statvfs((char *) name, &fs) == -1) {
|
|
546 return 512;
|
|
547 }
|
|
548
|
|
549 if ((fs.f_frsize % 512) != 0) {
|
|
550 return 512;
|
|
551 }
|
|
552
|
|
553 return (size_t) fs.f_frsize;
|
|
554 }
|
|
555
|
|
556 #else
|
|
557
|
|
558 size_t
|
|
559 ngx_fs_bsize(u_char *name)
|
|
560 {
|
|
561 return 512;
|
|
562 }
|
|
563
|
|
564 #endif
|