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