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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;
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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);
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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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10
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244 file->sys_offset += n;
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245 file->offset += n;
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646
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246 total += n;
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0
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247
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10
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248 } while (cl);
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0
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249
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646
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250 return total;
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0
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251 }
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252
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253
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110
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254 ngx_int_t
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230
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255 ngx_set_file_time(u_char *name, ngx_fd_t fd, time_t s)
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256 {
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257 struct timeval tv[2];
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258
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614
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259 tv[0].tv_sec = ngx_time();
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230
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260 tv[0].tv_usec = 0;
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261 tv[1].tv_sec = s;
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262 tv[1].tv_usec = 0;
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263
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264 if (utimes((char *) name, tv) != -1) {
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265 return NGX_OK;
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266 }
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267
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268 return NGX_ERROR;
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269 }
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270
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271
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272 ngx_int_t
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582
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273 ngx_create_file_mapping(ngx_file_mapping_t *fm)
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274 {
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275 fm->fd = ngx_open_file(fm->name, NGX_FILE_RDWR, NGX_FILE_TRUNCATE,
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276 NGX_FILE_DEFAULT_ACCESS);
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277 if (fm->fd == NGX_INVALID_FILE) {
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278 ngx_log_error(NGX_LOG_CRIT, fm->log, ngx_errno,
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279 ngx_open_file_n " \"%s\" failed", fm->name);
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280 return NGX_ERROR;
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281 }
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282
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283 if (ftruncate(fm->fd, fm->size) == -1) {
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284 ngx_log_error(NGX_LOG_CRIT, fm->log, ngx_errno,
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285 "ftruncate() \"%s\" failed", fm->name);
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286 goto failed;
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287 }
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288
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289 fm->addr = mmap(NULL, fm->size, PROT_READ|PROT_WRITE, MAP_SHARED,
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290 fm->fd, 0);
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291 if (fm->addr != MAP_FAILED) {
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292 return NGX_OK;
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293 }
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294
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295 ngx_log_error(NGX_LOG_CRIT, fm->log, ngx_errno,
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296 "mmap(%uz) \"%s\" failed", fm->size, fm->name);
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297
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298 failed:
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299
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300 if (ngx_close_file(fm->fd) == NGX_FILE_ERROR) {
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301 ngx_log_error(NGX_LOG_ALERT, fm->log, ngx_errno,
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302 ngx_close_file_n " \"%s\" failed", fm->name);
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303 }
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304
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305 return NGX_ERROR;
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306 }
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307
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308
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309 void
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310 ngx_close_file_mapping(ngx_file_mapping_t *fm)
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311 {
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312 if (munmap(fm->addr, fm->size) == -1) {
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313 ngx_log_error(NGX_LOG_CRIT, fm->log, ngx_errno,
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314 "munmap(%uz) \"%s\" failed", fm->size, fm->name);
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315 }
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316
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317 if (ngx_close_file(fm->fd) == NGX_FILE_ERROR) {
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318 ngx_log_error(NGX_LOG_ALERT, fm->log, ngx_errno,
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319 ngx_close_file_n " \"%s\" failed", fm->name);
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320 }
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321 }
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322
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323
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324 ngx_int_t
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110
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325 ngx_open_dir(ngx_str_t *name, ngx_dir_t *dir)
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0
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326 {
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327 dir->dir = opendir((const char *) name->data);
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328
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329 if (dir->dir == NULL) {
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330 return NGX_ERROR;
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331 }
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332
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6
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333 dir->valid_info = 0;
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0
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334
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335 return NGX_OK;
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336 }
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110
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337
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338
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238
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339 ngx_int_t
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|
406
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340 ngx_read_dir(ngx_dir_t *dir)
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341 {
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342 dir->de = readdir(dir->dir);
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343
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344 if (dir->de) {
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345 #if (NGX_HAVE_D_TYPE)
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346 dir->type = dir->de->d_type;
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456
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347 #else
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536
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348 dir->type = 0;
|
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406
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349 #endif
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350 return NGX_OK;
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351 }
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352
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353 return NGX_ERROR;
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354 }
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355
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356
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|
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357 ngx_int_t
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238
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358 ngx_open_glob(ngx_glob_t *gl)
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359 {
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372
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360 int n;
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361
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|
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362 n = glob((char *) gl->pattern, GLOB_NOSORT, NULL, &gl->pglob);
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363
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|
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364 if (n == 0) {
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365 return NGX_OK;
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|
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366 }
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367
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|
400
|
368 #ifdef GLOB_NOMATCH
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369
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372
|
370 if (n == GLOB_NOMATCH && gl->test) {
|
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238
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371 return NGX_OK;
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|
|
372 }
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373
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400
|
374 #endif
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|
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375
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238
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376 return NGX_ERROR;
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|
|
377 }
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|
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378
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|
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379
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|
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380 ngx_int_t
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|
|
381 ngx_read_glob(ngx_glob_t *gl, ngx_str_t *name)
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|
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382 {
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402
|
383 size_t count;
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|
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384
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|
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385 #ifdef GLOB_NOMATCH
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|
|
386 count = (size_t) gl->pglob.gl_pathc;
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387 #else
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388 count = (size_t) gl->pglob.gl_matchc;
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|
389 #endif
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390
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|
|
391 if (gl->n < count) {
|
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238
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392
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|
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393 name->len = (size_t) ngx_strlen(gl->pglob.gl_pathv[gl->n]);
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394 name->data = (u_char *) gl->pglob.gl_pathv[gl->n];
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|
395 gl->n++;
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396
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|
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397 return NGX_OK;
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|
|
398 }
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399
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|
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400 return NGX_DONE;
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|
|
401 }
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402
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|
|
403
|
|
|
404 void
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|
|
405 ngx_close_glob(ngx_glob_t *gl)
|
|
|
406 {
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|
|
407 globfree(&gl->pglob);
|
|
|
408 }
|
|
|
409
|
|
|
410
|
|
160
|
411 ngx_err_t
|
|
|
412 ngx_trylock_fd(ngx_fd_t fd)
|
|
110
|
413 {
|
|
|
414 struct flock fl;
|
|
|
415
|
|
680
|
416 ngx_memzero(&fl, sizeof(struct flock));
|
|
160
|
417 fl.l_type = F_WRLCK;
|
|
110
|
418 fl.l_whence = SEEK_SET;
|
|
160
|
419
|
|
|
420 if (fcntl(fd, F_SETLK, &fl) == -1) {
|
|
|
421 return ngx_errno;
|
|
|
422 }
|
|
|
423
|
|
|
424 return 0;
|
|
|
425 }
|
|
|
426
|
|
|
427
|
|
|
428 ngx_err_t
|
|
|
429 ngx_lock_fd(ngx_fd_t fd)
|
|
|
430 {
|
|
|
431 struct flock fl;
|
|
|
432
|
|
680
|
433 ngx_memzero(&fl, sizeof(struct flock));
|
|
110
|
434 fl.l_type = F_WRLCK;
|
|
160
|
435 fl.l_whence = SEEK_SET;
|
|
110
|
436
|
|
160
|
437 if (fcntl(fd, F_SETLKW, &fl) == -1) {
|
|
|
438 return ngx_errno;
|
|
110
|
439 }
|
|
|
440
|
|
160
|
441 return 0;
|
|
110
|
442 }
|
|
|
443
|
|
|
444
|
|
160
|
445 ngx_err_t
|
|
|
446 ngx_unlock_fd(ngx_fd_t fd)
|
|
110
|
447 {
|
|
|
448 struct flock fl;
|
|
|
449
|
|
680
|
450 ngx_memzero(&fl, sizeof(struct flock));
|
|
110
|
451 fl.l_type = F_UNLCK;
|
|
160
|
452 fl.l_whence = SEEK_SET;
|
|
110
|
453
|
|
160
|
454 if (fcntl(fd, F_SETLK, &fl) == -1) {
|
|
|
455 return ngx_errno;
|
|
110
|
456 }
|
|
|
457
|
|
160
|
458 return 0;
|
|
110
|
459 }
|
|
390
|
460
|
|
|
461
|
|
650
|
462 #if (NGX_HAVE_POSIX_FADVISE) && !(NGX_HAVE_F_READAHEAD)
|
|
546
|
463
|
|
|
464 ngx_int_t
|
|
|
465 ngx_read_ahead(ngx_fd_t fd, size_t n)
|
|
|
466 {
|
|
|
467 int err;
|
|
|
468
|
|
|
469 err = posix_fadvise(fd, 0, 0, POSIX_FADV_SEQUENTIAL);
|
|
|
470
|
|
|
471 if (err == 0) {
|
|
|
472 return 0;
|
|
|
473 }
|
|
|
474
|
|
|
475 ngx_set_errno(err);
|
|
|
476 return NGX_FILE_ERROR;
|
|
|
477 }
|
|
|
478
|
|
|
479 #endif
|
|
|
480
|
|
|
481
|
|
390
|
482 #if (NGX_HAVE_O_DIRECT)
|
|
|
483
|
|
|
484 ngx_int_t
|
|
410
|
485 ngx_directio_on(ngx_fd_t fd)
|
|
390
|
486 {
|
|
|
487 int flags;
|
|
|
488
|
|
|
489 flags = fcntl(fd, F_GETFL);
|
|
|
490
|
|
|
491 if (flags == -1) {
|
|
530
|
492 return NGX_FILE_ERROR;
|
|
390
|
493 }
|
|
|
494
|
|
|
495 return fcntl(fd, F_SETFL, flags | O_DIRECT);
|
|
|
496 }
|
|
|
497
|
|
410
|
498
|
|
|
499 ngx_int_t
|
|
|
500 ngx_directio_off(ngx_fd_t fd)
|
|
|
501 {
|
|
|
502 int flags;
|
|
|
503
|
|
|
504 flags = fcntl(fd, F_GETFL);
|
|
|
505
|
|
|
506 if (flags == -1) {
|
|
530
|
507 return NGX_FILE_ERROR;
|
|
410
|
508 }
|
|
|
509
|
|
|
510 return fcntl(fd, F_SETFL, flags & ~O_DIRECT);
|
|
|
511 }
|
|
|
512
|
|
390
|
513 #endif
|
|
468
|
514
|
|
|
515
|
|
|
516 #if (NGX_HAVE_STATFS)
|
|
|
517
|
|
|
518 size_t
|
|
|
519 ngx_fs_bsize(u_char *name)
|
|
|
520 {
|
|
|
521 struct statfs fs;
|
|
|
522
|
|
|
523 if (statfs((char *) name, &fs) == -1) {
|
|
|
524 return 512;
|
|
|
525 }
|
|
|
526
|
|
|
527 if ((fs.f_bsize % 512) != 0) {
|
|
|
528 return 512;
|
|
|
529 }
|
|
|
530
|
|
|
531 return (size_t) fs.f_bsize;
|
|
|
532 }
|
|
|
533
|
|
|
534 #elif (NGX_HAVE_STATVFS)
|
|
|
535
|
|
|
536 size_t
|
|
|
537 ngx_fs_bsize(u_char *name)
|
|
|
538 {
|
|
|
539 struct statvfs fs;
|
|
|
540
|
|
|
541 if (statvfs((char *) name, &fs) == -1) {
|
|
|
542 return 512;
|
|
|
543 }
|
|
|
544
|
|
|
545 if ((fs.f_frsize % 512) != 0) {
|
|
|
546 return 512;
|
|
|
547 }
|
|
|
548
|
|
|
549 return (size_t) fs.f_frsize;
|
|
|
550 }
|
|
|
551
|
|
|
552 #else
|
|
|
553
|
|
|
554 size_t
|
|
|
555 ngx_fs_bsize(u_char *name)
|
|
|
556 {
|
|
|
557 return 512;
|
|
|
558 }
|
|
|
559
|
|
|
560 #endif
|
