1 | /** |
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2 | * @file |
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3 | * |
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4 | * File system mount functions. |
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5 | */ |
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6 | |
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7 | /*===============================================================*\ |
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8 | | Project: RTEMS fsmount | |
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9 | +-----------------------------------------------------------------+ |
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10 | | File: fsmount.c | |
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11 | +-----------------------------------------------------------------+ |
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12 | | Copyright (c) 2003 IMD | |
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13 | | Ingenieurbuero fuer Microcomputertechnik Th. Doerfler | |
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14 | | <Thomas.Doerfler@imd-systems.de> | |
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15 | | all rights reserved | |
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16 | +-----------------------------------------------------------------+ |
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17 | | this file contains the fsmount functions. These functions | |
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18 | | are used to mount a list of filesystems (and create their mount | |
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19 | | points before) | |
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20 | | | |
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21 | | The license and distribution terms for this file may be | |
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22 | | found in the file LICENSE in this distribution or at | |
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23 | | http://www.rtems.com/license/LICENSE. | |
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24 | | | |
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25 | +-----------------------------------------------------------------+ |
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26 | | date history ID | |
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27 | | ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ | |
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28 | | 02.07.03 creation doe | |
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29 | \*===============================================================*/ |
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30 | |
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31 | #ifndef HAVE_CONFIG_H |
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32 | #include "config.h" |
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33 | #endif |
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34 | |
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35 | #include <rtems.h> |
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36 | #include <rtems/fsmount.h> |
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37 | #include <stdio.h> |
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38 | #include <stdlib.h> |
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39 | #include <string.h> |
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40 | #include <errno.h> |
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41 | #include <rtems/imfs.h> |
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42 | #include <sys/stat.h> |
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43 | |
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44 | /*=========================================================================*\ |
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45 | | Function: | |
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46 | \*-------------------------------------------------------------------------*/ |
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47 | int rtems_fsmount_create_mount_point |
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48 | ( |
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49 | /*-------------------------------------------------------------------------*\ |
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50 | | Purpose: | |
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51 | | This function will create the mount point given | |
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52 | +---------------------------------------------------------------------------+ |
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53 | | Input Parameters: | |
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54 | \*-------------------------------------------------------------------------*/ |
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55 | const char *mount_point |
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56 | ) |
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57 | /*-------------------------------------------------------------------------*\ |
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58 | | Return Value: | |
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59 | | 0, if success, -1 and errno if failed | |
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60 | \*=========================================================================*/ |
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61 | { |
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62 | int rc = 0; |
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63 | char *tok_buffer = NULL; |
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64 | char *token = NULL; |
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65 | int token_len; |
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66 | size_t total_len; |
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67 | IMFS_token_types token_type; |
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68 | struct stat file_info; |
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69 | /* |
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70 | * allocate temp memory to rebuild path name |
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71 | */ |
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72 | tok_buffer = calloc(strlen(mount_point)+1,sizeof(char)); |
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73 | if ( !tok_buffer ) |
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74 | return -1; |
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75 | token = tok_buffer; |
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76 | total_len = 0; |
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77 | do { |
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78 | /* |
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79 | * scan through given string, one segment at a time |
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80 | */ |
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81 | token_type = IMFS_get_token( |
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82 | mount_point+total_len, |
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83 | strlen(mount_point+total_len), |
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84 | token, |
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85 | &token_len |
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86 | ); |
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87 | total_len += token_len; |
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88 | strncpy(tok_buffer,mount_point,total_len); |
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89 | tok_buffer[total_len] = '\0'; |
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90 | |
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91 | if ((token_type != IMFS_NO_MORE_PATH) && |
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92 | (token_type != IMFS_CURRENT_DIR) && |
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93 | (token_type != IMFS_INVALID_TOKEN)) { |
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94 | /* |
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95 | * check, whether segment exists |
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96 | */ |
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97 | if (0 != stat(tok_buffer,&file_info)) { |
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98 | /* |
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99 | * if not, create directory |
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100 | */ |
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101 | rc = mknod(tok_buffer,S_IRWXU | S_IRWXG | S_IRWXO | S_IFDIR,0); |
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102 | } |
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103 | } |
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104 | } while ((rc == 0) && |
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105 | (token_type != IMFS_NO_MORE_PATH) && |
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106 | (token_type != IMFS_INVALID_TOKEN)); |
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107 | |
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108 | /* |
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109 | * return token buffer to heap. Verified to be non-NULL when calloc'ed. |
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110 | */ |
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111 | free(tok_buffer); |
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112 | return rc; |
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113 | } |
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114 | |
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115 | /*=========================================================================*\ |
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116 | | Function: | |
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117 | \*-------------------------------------------------------------------------*/ |
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118 | int rtems_fsmount |
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119 | ( |
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120 | /*-------------------------------------------------------------------------*\ |
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121 | | Purpose: | |
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122 | | This function will create the mount points listed and mount the file | |
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123 | | systems listed in the calling parameters | |
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124 | +---------------------------------------------------------------------------+ |
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125 | | Input Parameters: | |
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126 | \*-------------------------------------------------------------------------*/ |
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127 | const rtems_fstab_entry *fstab_ptr, |
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128 | size_t fstab_count, |
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129 | size_t *fail_idx |
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130 | ) |
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131 | /*-------------------------------------------------------------------------*\ |
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132 | | Return Value: | |
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133 | | 0, if success, -1 and errno if failed | |
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134 | \*=========================================================================*/ |
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135 | { |
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136 | int rc = 0; |
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137 | int tmp_rc; |
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138 | size_t fstab_idx = 0; |
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139 | rtems_filesystem_mount_table_entry_t *tmp_mt_entry; |
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140 | bool terminate = false; |
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141 | |
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142 | /* |
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143 | * scan through all fstab entries; |
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144 | */ |
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145 | while (!terminate && |
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146 | (fstab_idx < fstab_count)) { |
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147 | tmp_rc = 0; |
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148 | /* |
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149 | * create mount point |
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150 | */ |
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151 | if (tmp_rc == 0) { |
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152 | tmp_rc = rtems_fsmount_create_mount_point(fstab_ptr->mount_point); |
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153 | if (tmp_rc != 0) { |
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154 | if (0 != (fstab_ptr->report_reasons & FSMOUNT_MNTPNT_CRTERR)) { |
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155 | fprintf(stdout,"fsmount: creation of mount point \"%s\" failed: %s\n", |
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156 | fstab_ptr->mount_point, |
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157 | strerror(errno)); |
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158 | } |
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159 | if (0 != (fstab_ptr->abort_reasons & FSMOUNT_MNTPNT_CRTERR)) { |
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160 | terminate = true; |
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161 | rc = tmp_rc; |
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162 | } |
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163 | } |
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164 | } |
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165 | /* |
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166 | * mount device to given mount point |
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167 | */ |
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168 | if (tmp_rc == 0) { |
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169 | tmp_rc = mount(&tmp_mt_entry, |
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170 | fstab_ptr->fs_ops, |
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171 | fstab_ptr->mount_options, |
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172 | fstab_ptr->dev, |
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173 | fstab_ptr->mount_point); |
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174 | if (tmp_rc != 0) { |
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175 | if (0 != (fstab_ptr->report_reasons & FSMOUNT_MNT_FAILED)) { |
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176 | fprintf(stdout,"fsmount: mounting of \"%s\" to" |
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177 | " \"%s\" failed: %s\n", |
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178 | fstab_ptr->dev, |
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179 | fstab_ptr->mount_point, |
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180 | strerror(errno)); |
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181 | } |
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182 | if (0 != (fstab_ptr->abort_reasons & FSMOUNT_MNT_FAILED)) { |
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183 | terminate = true; |
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184 | rc = tmp_rc; |
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185 | } |
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186 | } |
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187 | else { |
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188 | if (0 != (fstab_ptr->report_reasons & FSMOUNT_MNT_OK)) { |
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189 | fprintf(stdout,"fsmount: mounting of \"%s\" to" |
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190 | " \"%s\" succeeded\n", |
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191 | fstab_ptr->dev, |
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192 | fstab_ptr->mount_point); |
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193 | } |
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194 | if (0 != (fstab_ptr->abort_reasons & FSMOUNT_MNT_OK)) { |
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195 | terminate = true; |
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196 | } |
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197 | } |
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198 | } |
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199 | /* |
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200 | * proceed to next entry |
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201 | */ |
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202 | if (!terminate) { |
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203 | fstab_ptr++; |
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204 | fstab_idx++; |
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205 | } |
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206 | } |
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207 | if (fail_idx != NULL) { |
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208 | *fail_idx = fstab_idx; |
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209 | } |
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210 | return rc; |
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211 | } |
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