21 struct file_info files[MAX_FILES];
26 int parse_config_input(ezxml_t cfg_input);
27 int write_output(char * filename, ezxml_t cfg_output);
28 int copy_file(int file_index, FILE * data_file);
31 printf("Usage: build_vm <infile> [-o outfile]\n");
34 int main(int argc, char ** argv) {
36 char * outfile = NULL;
40 memset((char *)files, 0, sizeof(files));
44 while ((c = getopt(argc, argv, "ho:")) != -1) {
62 infile = argv[optind];
65 printf("Input file: %s\n", infile);
67 ezxml_t cfg_input = ezxml_parse_file(infile);
69 if (cfg_input == NULL) {
70 printf("Could not open configuration input file: %s\n", infile);
78 if (parse_config_input(cfg_input) == -1) {
79 printf("Error parsing configuration input\n");
83 // printf("xml : %s\n", ezxml_toxml(cfg_input));
89 if (outfile == NULL) {
90 char * endptr = rindex(infile, '.');
92 outfile = malloc(strlen(infile) + strlen(".dat") + 1);
98 sprintf(outfile, "%s.dat", infile);
102 write_output(outfile, cfg_input);
108 char * get_val(ezxml_t cfg, char * tag) {
109 char * attrib = (char *)ezxml_attr(cfg, tag);
110 ezxml_t txt = ezxml_child(cfg, tag);
112 if ((txt != NULL) && (attrib != NULL)) {
113 printf("Invalid Cfg file: Duplicate value for %s (attr=%s, txt=%s)\n",
114 tag, attrib, ezxml_txt(txt));
118 return (attrib == NULL) ? ezxml_txt(txt) : attrib;
123 int parse_config_input(ezxml_t cfg_input) {
124 ezxml_t file_tags = NULL;
125 ezxml_t tmp_file_tag = NULL;
127 // files are transformed into blobs that are slapped to the end of the file
129 file_tags = ezxml_child(cfg_input, "files");
131 tmp_file_tag = ezxml_child(file_tags, "file");
133 while (tmp_file_tag) {
134 char * filename = get_val(tmp_file_tag, "filename");
135 struct stat file_stats;
136 char * id = get_val(tmp_file_tag, "id");
140 if (stat(filename, &file_stats) != 0) {
145 files[num_files].size = (unsigned int)file_stats.st_size;
146 strncpy(files[num_files].id, id, 256);
147 strncpy(files[num_files].filename, filename, 2048);
149 snprintf(index_buf, 256, "%d", num_files);
150 ezxml_set_attr_d(tmp_file_tag, "index", index_buf);
153 tmp_file_tag = ezxml_next(tmp_file_tag);
161 int write_output(char * filename, ezxml_t cfg_output) {
162 FILE * data_file = fopen(filename, "w+");
163 char * new_cfg_str = ezxml_toxml(cfg_output);
164 unsigned int cfg_len = strlen(new_cfg_str);
165 unsigned long long zero = 0;
167 unsigned long long offset = 0;
168 unsigned long long file_cnt = num_files;
170 fwrite("v3vee\0\0\0", 8, 1, data_file);
173 // printf("New config: \n%s\n", new_cfg_str);
175 fwrite(&cfg_len, sizeof(unsigned int), 1, data_file);
176 offset += sizeof(unsigned int);
178 fwrite(new_cfg_str, cfg_len, 1, data_file);
181 fwrite(&zero, 1, 8, data_file);
184 printf("Total number of files: %llu\n", file_cnt);
186 fwrite(&file_cnt, 8, 1, data_file);
189 // each index entry is 16 bytes long plus end padding
190 offset += (16 * num_files) + 8;
192 for (i = 0; i < num_files; i++) {
193 fwrite(&i, 4, 1, data_file);
194 fwrite(&(files[i].size), 4, 1, data_file);
195 fwrite(&offset, 8, 1, data_file);
197 offset += files[i].size;
200 fwrite(&zero, 1, 8, data_file);
202 for (i = 0; i < num_files; i++) {
204 copy_file(i, data_file);
216 #define XFER_BLK_SIZE 4096
218 int copy_file(int file_index, FILE * data_file) {
219 char xfer_buf[XFER_BLK_SIZE];
220 int bytes_to_read = files[file_index].size;
222 int xfer_len = XFER_BLK_SIZE;
223 FILE * in_file = NULL;
224 char * filename = files[file_index].filename;
231 printf("Copying [%d] -- %s \n",
236 if (ioctl(STDIO_FD, TIOCGWINSZ, &wsz) == -1) {
237 printf("ioctl error on STDIO\n");
242 memset(cons_line, 0, 256);
243 snprintf(cons_line, 256, "\r(%s) [", files[file_index].id);
244 prog_len = wsz.ws_col - (strlen(cons_line) + 11);
248 in_file = fopen(filename, "r");
250 while (bytes_to_read > 0) {
251 struct winsize tmp_wsz;
254 if (ioctl(STDIO_FD, TIOCGWINSZ, &tmp_wsz) == -1) {
255 printf("ioctl error on STDIO\n");
259 ratio = (double)bytes_read / (double)(files[file_index].size);
260 tmp_dots = (int)(ratio * (double)prog_len);
262 if ((tmp_dots != num_dots) || (tmp_wsz.ws_col != wsz.ws_col)) {
269 num_blanks = prog_len - num_dots;
271 memset(cons_line, 0, 256);
272 snprintf(cons_line, 256, "\r(%s) [", files[file_index].id);
274 for (i = 0; i < num_dots; i++) {
275 strcat(cons_line, "=");
278 for (i = 0; i < num_blanks; i++) {
279 strcat(cons_line, " ");
282 strcat(cons_line, "]");
284 // printf("console width = %d\n", wsz.ws_col);
285 write(STDIO_FD, cons_line, wsz.ws_col);
290 if (xfer_len > bytes_to_read) {
291 xfer_len = bytes_to_read;
294 if (fread(xfer_buf, xfer_len, 1, in_file) == 0) {
295 printf("Error reading data file %s\n", filename);
299 if (fwrite(xfer_buf, xfer_len, 1, data_file) == 0) {
300 printf("Error writing data file contents");
305 bytes_read += xfer_len;
306 bytes_to_read -= xfer_len;
309 strcat(cons_line, "Done\n");
310 write(STDIO_FD, cons_line, wsz.ws_col);