FreeCalypso > hg > freecalypso-tools
annotate ffstools/tiffs-mkfs/output.c @ 763:4eaad91f4d68
CHANGES: document rvinterf -b PID addition
author | Mychaela Falconia <falcon@freecalypso.org> |
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date | Wed, 02 Dec 2020 20:32:02 +0000 |
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1 #include <sys/types.h> |
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2 #include <sys/param.h> |
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3 #include <sys/file.h> |
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4 #include <stdio.h> |
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5 #include <stdint.h> |
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6 #include <endian.h> |
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7 #include <stdlib.h> |
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8 #include <string.h> |
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9 #include <strings.h> |
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10 #include <unistd.h> |
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11 #include "struct.h" |
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12 #include "globals.h" |
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13 |
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14 u_char tiffs_header[6] = {'F', 'f', 's', '#', 0x10, 0x02}; |
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15 |
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16 void |
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17 prepare_output_buffers() |
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18 { |
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19 inode_block = malloc(ffs_sector_size); |
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20 if (!inode_block) { |
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21 perror("malloc of inode block buffer"); |
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22 exit(1); |
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23 } |
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24 memset(inode_block, 0xFF, ffs_sector_size); |
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25 bcopy(tiffs_header, inode_block, 6); |
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26 inode_block[8] = 0xAB; |
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27 inode_array = (struct tiffs_inode *) inode_block; |
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28 inode_fill_level = 1; |
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29 |
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30 data_block = malloc(ffs_sector_size); |
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31 if (!data_block) { |
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32 perror("malloc of data block buffer"); |
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33 exit(1); |
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34 } |
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35 memset(data_block, 0xFF, ffs_sector_size); |
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36 bcopy(tiffs_header, data_block, 6); |
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37 data_block[8] = 0xBD; |
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38 data_fill_level = 0x10; |
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39 objects_in_block = 0; |
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40 |
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41 chunk_buffer = malloc(chunk_size_max); |
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42 if (!chunk_buffer) { |
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43 perror("malloc of file chunk buffer"); |
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44 exit(1); |
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45 } |
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46 } |
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47 |
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48 void |
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49 open_output_file() |
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50 { |
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51 output_fd = open(output_filename, O_WRONLY|O_CREAT|O_TRUNC, 0666); |
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52 if (output_fd < 0) { |
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53 perror(output_filename); |
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54 exit(1); |
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55 } |
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56 lseek(output_fd, (off_t) ffs_sector_size, SEEK_SET); |
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57 } |
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58 |
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59 void |
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60 write_out_block(buf) |
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61 u_char *buf; |
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62 { |
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63 if (write(output_fd, buf, ffs_sector_size) != ffs_sector_size) { |
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64 perror("write of sector bits to output file"); |
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65 exit(1); |
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66 } |
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67 } |
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68 |
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69 void |
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70 flush_data_block() |
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71 { |
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72 write_out_block(data_block); |
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73 blocks_written++; |
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74 memset(data_block + 0x10, 0xFF, ffs_sector_size - 0x10); |
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75 data_fill_level = 0x10; |
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76 objects_in_block = 0; |
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77 } |
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78 |
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79 create_object(name, type, data, datalen) |
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80 char *name; |
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81 u_char *data; |
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82 unsigned datalen; |
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83 { |
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84 int ino; |
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85 struct tiffs_inode *inp; |
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86 unsigned size, location; |
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87 u_char *dp; |
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88 |
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89 if (inode_fill_level >= (ffs_sector_size >> 4)) { |
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90 fprintf(stderr, "error: inode block is full\n"); |
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91 exit(1); |
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92 } |
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93 ino = inode_fill_level++; |
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94 inp = inode_array + ino; |
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95 if (name) |
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96 size = strlen(name) + 1; |
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97 else |
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98 size = 0; |
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99 if (datalen) |
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100 size += datalen + 1; |
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101 size = (size + 15) & ~15; |
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102 if (ffs_sector_size - data_fill_level < size || |
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103 objects_in_block >= block_files_max) |
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104 flush_data_block(); |
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105 if (blocks_written >= ffs_nsectors - 2) { |
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106 fprintf(stderr, "error: wrote max number of data blocks\n"); |
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107 exit(1); |
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108 } |
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109 location = (blocks_written + 1) * ffs_sector_size + data_fill_level; |
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110 /* write the data */ |
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111 dp = data_block + data_fill_level; |
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112 if (name) { |
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113 strcpy(dp, name); |
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114 dp += strlen(name) + 1; |
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115 } |
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116 if (datalen) { |
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117 if (data) |
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118 bcopy(data, dp, datalen); |
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119 dp += datalen; |
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120 *dp++ = 0; |
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121 } |
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122 /* fill the inode */ |
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123 inp->size = htole16(size); |
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124 inp->type = type; |
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tiffs-mkfs: fixed bug in location inode field
Mychaela Falconia <falcon@freecalypso.org>
parents:
705
diff
changeset
|
125 inp->location = htole32(location >> 4); |
705
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126 inp->sequence = htole16(ino - 1); |
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127 inp->updates = 0; |
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128 /* accounting */ |
12ae93940467
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129 data_fill_level += size; |
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130 objects_in_block++; |
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131 return ino; |
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132 } |
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133 |
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134 void |
12ae93940467
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135 create_root_dir() |
12ae93940467
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parents:
diff
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136 { |
12ae93940467
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diff
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137 int rootino; |
12ae93940467
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138 |
12ae93940467
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139 rootino = create_object(format_name, OBJTYPE_DIR, (u_char *) 0, 0); |
12ae93940467
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140 root.u.d.ffs_link_ptr = &inode_array[rootino].child; |
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141 } |
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142 |
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143 create_file_object(to) |
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144 struct tree_object *to; |
12ae93940467
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145 { |
12ae93940467
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146 int fd, cc; |
12ae93940467
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147 int head, seg; |
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148 struct tiffs_inode *inp; |
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149 |
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150 fd = open(to->u.f.host_pathname, O_RDONLY); |
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151 if (fd < 0) { |
12ae93940467
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152 perror(to->u.f.host_pathname); |
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153 exit(1); |
12ae93940467
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154 } |
708
e2e4aed24522
tiffs-mkfs: malloc file chunk buffer only once
Mychaela Falconia <falcon@freecalypso.org>
parents:
707
diff
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155 cc = read(fd, chunk_buffer, chunk_size_max); |
705
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156 if (cc < 0) { |
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157 read_err: perror("error reading file content"); |
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158 exit(1); |
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159 } |
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160 if (cc == 0) { |
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161 /* zero length file */ |
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162 close(fd); |
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163 return create_object(to->name, OBJTYPE_FILE, (u_char *) 0, 0); |
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164 } |
708
e2e4aed24522
tiffs-mkfs: malloc file chunk buffer only once
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parents:
707
diff
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165 head = create_object(to->name, OBJTYPE_FILE, chunk_buffer, cc); |
705
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166 inp = inode_array + head; |
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167 for (;;) { |
708
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tiffs-mkfs: malloc file chunk buffer only once
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parents:
707
diff
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168 cc = read(fd, chunk_buffer, chunk_size_max); |
705
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169 if (cc < 0) |
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170 goto read_err; |
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171 if (cc == 0) |
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172 break; |
708
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tiffs-mkfs: malloc file chunk buffer only once
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parents:
707
diff
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173 seg = create_object((char *) 0, OBJTYPE_SEGMENT, chunk_buffer, |
e2e4aed24522
tiffs-mkfs: malloc file chunk buffer only once
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parents:
707
diff
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|
174 cc); |
705
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diff
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175 inp->child = htole16(seg); |
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176 inp = inode_array + seg; |
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177 } |
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diff
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|
178 close(fd); |
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179 return head; |
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|
180 } |
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|
181 |
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diff
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|
182 create_subdir(to) |
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parents:
diff
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|
183 struct tree_object *to; |
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diff
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|
184 { |
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parents:
diff
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|
185 int ino; |
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diff
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|
186 |
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187 ino = create_object(to->name, OBJTYPE_DIR, (u_char *) 0, 0); |
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188 to->u.d.ffs_link_ptr = &inode_array[ino].child; |
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parents:
diff
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189 return ino; |
12ae93940467
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parents:
diff
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|
190 } |
12ae93940467
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parents:
diff
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|
191 |
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parents:
diff
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|
192 void |
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parents:
diff
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|
193 process_dir_level(dto) |
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parents:
diff
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|
194 struct tree_object *dto; |
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diff
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|
195 { |
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diff
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|
196 unsigned n; |
12ae93940467
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
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|
197 struct tree_object *cto; |
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parents:
diff
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|
198 int child_ino; |
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diff
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|
199 |
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
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|
200 for (n = 0; n < dto->u.d.nchildren; n++) { |
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parents:
diff
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|
201 cto = dto->u.d.children[n]; |
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parents:
diff
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|
202 if (cto->is_dir) { |
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parents:
diff
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|
203 child_ino = create_subdir(cto); |
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
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|
204 process_dir_level(cto); |
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parents:
diff
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|
205 } else |
12ae93940467
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
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|
206 child_ino = create_file_object(cto); |
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
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|
207 *dto->u.d.ffs_link_ptr = htole16(child_ino); |
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diff
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|
208 dto->u.d.ffs_link_ptr = &inode_array[child_ino].sibling; |
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parents:
diff
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|
209 } |
12ae93940467
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
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|
210 } |
12ae93940467
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parents:
diff
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|
211 |
12ae93940467
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parents:
diff
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|
212 void |
717
178ed445021d
tiffs-mkfs: journal creation implemented
Mychaela Falconia <falcon@freecalypso.org>
parents:
708
diff
changeset
|
213 create_journal() |
178ed445021d
tiffs-mkfs: journal creation implemented
Mychaela Falconia <falcon@freecalypso.org>
parents:
708
diff
changeset
|
214 { |
178ed445021d
tiffs-mkfs: journal creation implemented
Mychaela Falconia <falcon@freecalypso.org>
parents:
708
diff
changeset
|
215 int ino; |
178ed445021d
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Mychaela Falconia <falcon@freecalypso.org>
parents:
708
diff
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|
216 |
178ed445021d
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Mychaela Falconia <falcon@freecalypso.org>
parents:
708
diff
changeset
|
217 ino = create_object(".journal", OBJTYPE_FILE_RO, (u_char *) 0, |
178ed445021d
tiffs-mkfs: journal creation implemented
Mychaela Falconia <falcon@freecalypso.org>
parents:
708
diff
changeset
|
218 journal_size); |
178ed445021d
tiffs-mkfs: journal creation implemented
Mychaela Falconia <falcon@freecalypso.org>
parents:
708
diff
changeset
|
219 *root.u.d.ffs_link_ptr = htole16(ino); |
178ed445021d
tiffs-mkfs: journal creation implemented
Mychaela Falconia <falcon@freecalypso.org>
parents:
708
diff
changeset
|
220 root.u.d.ffs_link_ptr = &inode_array[ino].sibling; |
178ed445021d
tiffs-mkfs: journal creation implemented
Mychaela Falconia <falcon@freecalypso.org>
parents:
708
diff
changeset
|
221 } |
178ed445021d
tiffs-mkfs: journal creation implemented
Mychaela Falconia <falcon@freecalypso.org>
parents:
708
diff
changeset
|
222 |
178ed445021d
tiffs-mkfs: journal creation implemented
Mychaela Falconia <falcon@freecalypso.org>
parents:
708
diff
changeset
|
223 void |
705
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
224 finish_output() |
12ae93940467
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
225 { |
12ae93940467
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
226 if (objects_in_block) |
12ae93940467
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
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|
227 flush_data_block(); |
12ae93940467
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
228 while (blocks_written < ffs_nsectors - 2) { |
12ae93940467
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
229 write_out_block(data_block); |
12ae93940467
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
230 blocks_written++; |
12ae93940467
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
231 } |
12ae93940467
tiffs-mkfs program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
232 /* free block at the end */ |
12ae93940467
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
233 data_block[8] = 0xBF; |
12ae93940467
tiffs-mkfs program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
234 write_out_block(data_block); |
12ae93940467
tiffs-mkfs program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
235 /* write out the inode block */ |
12ae93940467
tiffs-mkfs program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
236 lseek(output_fd, (off_t) 0, SEEK_SET); |
12ae93940467
tiffs-mkfs program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
237 write_out_block(inode_block); |
12ae93940467
tiffs-mkfs program written, compiles
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parents:
diff
changeset
|
238 } |