44 lines
960 B
C
44 lines
960 B
C
#include <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <string.h>
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#include <sys/stat.h>
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void usage()
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{
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fprintf(stderr, "Usage: blkunpack dirname\n");
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}
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int main(int argc, char *argv[])
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{
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char buf[1024];
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int blkid = 0;
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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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while (fread(buf, 1024, 1, stdin) == 1) {
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char fullpath[0x200];
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sprintf(fullpath, "%s/%03d", argv[1], blkid);
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char c = 0;
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for (int i=0; i<1024; i++) {
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c |= buf[i];
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}
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if (c) {
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// not an empty block
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FILE *fp = fopen(fullpath, "w");
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for (int i=0; i<16; i++) {
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int len = strlen(&buf[i*64]);
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fwrite(&buf[i*64], len, 1, fp);
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fputc('\n', fp);
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}
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fclose(fp);
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} else {
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// empty block, delete
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unlink(fullpath);
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}
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blkid++;
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}
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return 0;
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}
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