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