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- #include <stdio.h>
- #include <stdlib.h>
- #include <unistd.h>
- #include <dirent.h>
- #include <errno.h>
- #include <string.h>
- #include <sys/stat.h>
-
- void usage()
- {
- fprintf(stderr, "Usage: blkpack dirname\n");
- }
-
- int main(int argc, char *argv[])
- {
- DIR *dp;
- struct dirent *ep;
- char *buf = NULL;
- int blkcnt = 0;
- if (argc != 2) {
- usage();
- return 1;
- }
- dp = opendir(argv[1]);
- if (dp == NULL) {
- fprintf(stderr, "Couldn't open directory.\n");
- return 1;
- }
- while ((ep = readdir(dp))) {
- if ((strcmp(ep->d_name, ".") == 0) || strcmp(ep->d_name, "..") == 0) {
- continue;
- }
- int blkid = atoi(ep->d_name);
- if (blkid >= blkcnt) {
- int newcnt = blkid+1;
- buf = realloc(buf, newcnt*1024);
- bzero(buf+(blkcnt*1024), (newcnt-blkcnt)*1024);
- blkcnt = newcnt;
- }
- char fullpath[0x200];
- strcpy(fullpath, argv[1]);
- strcat(fullpath, "/");
- strcat(fullpath, ep->d_name);
- FILE *fp = fopen(fullpath, "r");
- if (fp == NULL) {
- fprintf(stderr, "Could not open %s: %s\n", ep->d_name, strerror(errno));
- continue;
- }
- char *line = NULL;
- size_t n = 0;
- for (int i=0; i<16; i++) {
- ssize_t cnt = getline(&line, &n, fp);
- if (cnt < 0) break;
- if (cnt > 65) {
- fprintf(stderr, "Line %d too long in blk %s\n", i+1, ep->d_name);
- }
- strncpy(buf+(blkid*1024)+(i*64), line, cnt-1);
- }
- ssize_t cnt = getline(&line, &n, fp);
- if (cnt > 0) {
- fprintf(stderr, "blk %s has more than 16 lines\n", ep->d_name);
- }
- free(line);
- fclose(fp);
- }
- fwrite(buf, 1024, blkcnt, stdout);
- free(buf);
- closedir(dp);
- return 0;
- }
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