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