FreeCalypso > hg > freecalypso-tools

annotate ffstools/tiffs-mkfs/output.c @ 708:e2e4aed24522

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tiffs-mkfs: malloc file chunk buffer only once
author Mychaela Falconia <falcon@freecalypso.org>
date Sat, 23 May 2020 02:50:06 +0000
parents 805885936f62
children 178ed445021d
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
705
12ae93940467 tiffs-mkfs program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
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1 #include <sys/types.h>
12ae93940467 tiffs-mkfs program written, compiles
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2 #include <sys/param.h>
12ae93940467 tiffs-mkfs program written, compiles
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3 #include <sys/file.h>
12ae93940467 tiffs-mkfs program written, compiles
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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 }
705
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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) {
12ae93940467 tiffs-mkfs program written, compiles
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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 (data)
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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 (data) {
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117 bcopy(data, dp, datalen);
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118 dp += datalen;
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119 *dp++ = 0;
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120 }
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121 /* fill the inode */
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122 inp->size = htole16(size);
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123 inp->type = type;
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124 inp->location = htole32(location >> 4);
705
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125 inp->sequence = htole16(ino - 1);
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126 inp->updates = 0;
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127 /* accounting */
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128 data_fill_level += size;
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129 objects_in_block++;
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130 return ino;
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131 }
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132
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133 void
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134 create_root_dir()
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135 {
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136 int rootino;
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137
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138 rootino = create_object(format_name, OBJTYPE_DIR, (u_char *) 0, 0);
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139 root.u.d.ffs_link_ptr = &inode_array[rootino].child;
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140 }
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141
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parents:
diff changeset
142 create_file_object(to)
12ae93940467 tiffs-mkfs program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
143 struct tree_object *to;
12ae93940467 tiffs-mkfs program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
144 {
12ae93940467 tiffs-mkfs program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
145 int fd, cc;
12ae93940467 tiffs-mkfs program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
146 int head, seg;
12ae93940467 tiffs-mkfs program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
147 struct tiffs_inode *inp;
12ae93940467 tiffs-mkfs program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
148
12ae93940467 tiffs-mkfs program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
149 fd = open(to->u.f.host_pathname, O_RDONLY);
12ae93940467 tiffs-mkfs program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
150 if (fd < 0) {
12ae93940467 tiffs-mkfs program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
151 perror(to->u.f.host_pathname);
12ae93940467 tiffs-mkfs program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
152 exit(1);
12ae93940467 tiffs-mkfs program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
153 }
708
e2e4aed24522 tiffs-mkfs: malloc file chunk buffer only once
Mychaela Falconia <falcon@freecalypso.org>
parents: 707
diff changeset
154 cc = read(fd, chunk_buffer, chunk_size_max);
705
12ae93940467 tiffs-mkfs program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
155 if (cc < 0) {
12ae93940467 tiffs-mkfs program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
156 read_err: perror("error reading file content");
12ae93940467 tiffs-mkfs program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
157 exit(1);
12ae93940467 tiffs-mkfs program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
158 }
12ae93940467 tiffs-mkfs program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
159 if (cc == 0) {
12ae93940467 tiffs-mkfs program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
160 /* zero length file */
12ae93940467 tiffs-mkfs program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
161 close(fd);
12ae93940467 tiffs-mkfs program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
162 return create_object(to->name, OBJTYPE_FILE, (u_char *) 0, 0);
12ae93940467 tiffs-mkfs program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
163 }
708
e2e4aed24522 tiffs-mkfs: malloc file chunk buffer only once
Mychaela Falconia <falcon@freecalypso.org>
parents: 707
diff changeset
164 head = create_object(to->name, OBJTYPE_FILE, chunk_buffer, cc);
705
12ae93940467 tiffs-mkfs program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
165 inp = inode_array + head;
12ae93940467 tiffs-mkfs program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
166 for (;;) {
708
e2e4aed24522 tiffs-mkfs: malloc file chunk buffer only once
Mychaela Falconia <falcon@freecalypso.org>
parents: 707
diff changeset
167 cc = read(fd, chunk_buffer, chunk_size_max);
705
12ae93940467 tiffs-mkfs program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
168 if (cc < 0)
12ae93940467 tiffs-mkfs program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
169 goto read_err;
12ae93940467 tiffs-mkfs program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
170 if (cc == 0)
12ae93940467 tiffs-mkfs program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
171 break;
708
e2e4aed24522 tiffs-mkfs: malloc file chunk buffer only once
Mychaela Falconia <falcon@freecalypso.org>
parents: 707
diff changeset
172 seg = create_object((char *) 0, OBJTYPE_SEGMENT, chunk_buffer,
e2e4aed24522 tiffs-mkfs: malloc file chunk buffer only once
Mychaela Falconia <falcon@freecalypso.org>
parents: 707
diff changeset
173 cc);
705
12ae93940467 tiffs-mkfs program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
174 inp->child = htole16(seg);
12ae93940467 tiffs-mkfs program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
175 inp = inode_array + seg;
12ae93940467 tiffs-mkfs program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
176 }
12ae93940467 tiffs-mkfs program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
177 close(fd);
12ae93940467 tiffs-mkfs program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
178 return head;
12ae93940467 tiffs-mkfs program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
179 }
12ae93940467 tiffs-mkfs program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
180
12ae93940467 tiffs-mkfs program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
181 create_subdir(to)
12ae93940467 tiffs-mkfs program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
182 struct tree_object *to;
12ae93940467 tiffs-mkfs program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
183 {
12ae93940467 tiffs-mkfs program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
184 int ino;
12ae93940467 tiffs-mkfs program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
185
12ae93940467 tiffs-mkfs program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
186 ino = create_object(to->name, OBJTYPE_DIR, (u_char *) 0, 0);
12ae93940467 tiffs-mkfs program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
187 to->u.d.ffs_link_ptr = &inode_array[ino].child;
12ae93940467 tiffs-mkfs program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
188 return ino;
12ae93940467 tiffs-mkfs program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
189 }
12ae93940467 tiffs-mkfs program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
190
12ae93940467 tiffs-mkfs program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
191 void
12ae93940467 tiffs-mkfs program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
192 process_dir_level(dto)
12ae93940467 tiffs-mkfs program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
193 struct tree_object *dto;
12ae93940467 tiffs-mkfs program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
194 {
12ae93940467 tiffs-mkfs program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
195 unsigned n;
12ae93940467 tiffs-mkfs program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
196 struct tree_object *cto;
12ae93940467 tiffs-mkfs program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
197 int child_ino;
12ae93940467 tiffs-mkfs program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
198
12ae93940467 tiffs-mkfs program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
199 for (n = 0; n < dto->u.d.nchildren; n++) {
12ae93940467 tiffs-mkfs program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
200 cto = dto->u.d.children[n];
12ae93940467 tiffs-mkfs program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
201 if (cto->is_dir) {
12ae93940467 tiffs-mkfs program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
202 child_ino = create_subdir(cto);
12ae93940467 tiffs-mkfs program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
203 process_dir_level(cto);
12ae93940467 tiffs-mkfs program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
204 } else
12ae93940467 tiffs-mkfs program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
205 child_ino = create_file_object(cto);
12ae93940467 tiffs-mkfs program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
206 *dto->u.d.ffs_link_ptr = htole16(child_ino);
12ae93940467 tiffs-mkfs program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
207 dto->u.d.ffs_link_ptr = &inode_array[child_ino].sibling;
12ae93940467 tiffs-mkfs program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
208 }
12ae93940467 tiffs-mkfs program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
209 }
12ae93940467 tiffs-mkfs program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
210
12ae93940467 tiffs-mkfs program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
211 void
12ae93940467 tiffs-mkfs program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
212 finish_output()
12ae93940467 tiffs-mkfs program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
213 {
12ae93940467 tiffs-mkfs program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
214 if (objects_in_block)
12ae93940467 tiffs-mkfs program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
215 flush_data_block();
12ae93940467 tiffs-mkfs program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
216 while (blocks_written < ffs_nsectors - 2) {
12ae93940467 tiffs-mkfs program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
217 write_out_block(data_block);
12ae93940467 tiffs-mkfs program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
218 blocks_written++;
12ae93940467 tiffs-mkfs program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
219 }
12ae93940467 tiffs-mkfs program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
220 /* free block at the end */
12ae93940467 tiffs-mkfs program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
221 data_block[8] = 0xBF;
12ae93940467 tiffs-mkfs program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
222 write_out_block(data_block);
12ae93940467 tiffs-mkfs program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
223 /* write out the inode block */
12ae93940467 tiffs-mkfs program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
224 lseek(output_fd, (off_t) 0, SEEK_SET);
12ae93940467 tiffs-mkfs program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
225 write_out_block(inode_block);
12ae93940467 tiffs-mkfs program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
226 }