mirror of
https://github.com/hsoft/collapseos.git
synced 2024-09-07 14:08:44 +10:00
118 lines
3.0 KiB
C
118 lines
3.0 KiB
C
|
#include <stdio.h>
|
||
|
#include <dirent.h>
|
||
|
#include <string.h>
|
||
|
|
||
|
#define BLKSIZE 0x100
|
||
|
#define HEADERSIZE 0x20
|
||
|
#define MAX_FN_LEN 25 // 26 - null char
|
||
|
#define MAX_FILE_SIZE (BLKSIZE * 0x100) - HEADERSIZE
|
||
|
|
||
|
int spitblock(char *fullpath, char *fn)
|
||
|
{
|
||
|
FILE *fp = fopen(fullpath, "r");
|
||
|
fseek(fp, 0, SEEK_END);
|
||
|
long fsize = ftell(fp);
|
||
|
if (fsize > MAX_FILE_SIZE) {
|
||
|
fclose(fp);
|
||
|
fprintf(stderr, "File too big: %s %ld\n", fullpath, fsize);
|
||
|
return 1;
|
||
|
}
|
||
|
/* Compute block count.
|
||
|
* We always have at least one, which contains 0x100 bytes - 0x20, which is
|
||
|
* metadata. The rest of the blocks have a steady 0x100.
|
||
|
*/
|
||
|
unsigned char blockcount = 1;
|
||
|
int fsize2 = fsize - (BLKSIZE - HEADERSIZE);
|
||
|
if (fsize2 > 0) {
|
||
|
blockcount += (fsize2 / BLKSIZE);
|
||
|
}
|
||
|
if (blockcount * BLKSIZE < fsize) {
|
||
|
blockcount++;
|
||
|
}
|
||
|
putchar('C');
|
||
|
putchar('F');
|
||
|
putchar('S');
|
||
|
putchar(blockcount);
|
||
|
// file size is little endian
|
||
|
putchar(fsize & 0xff);
|
||
|
putchar((fsize >> 8) & 0xff);
|
||
|
int fnlen = strlen(fn);
|
||
|
for (int i=0; i<MAX_FN_LEN; i++) {
|
||
|
if (i < fnlen) {
|
||
|
putchar(fn[i]);
|
||
|
} else {
|
||
|
putchar(0);
|
||
|
}
|
||
|
}
|
||
|
// And the last FN char which is always null
|
||
|
putchar(0);
|
||
|
char buf[MAX_FILE_SIZE] = {0};
|
||
|
rewind(fp);
|
||
|
fread(buf, fsize, 1, fp);
|
||
|
fclose(fp);
|
||
|
fwrite(buf, (blockcount * BLKSIZE) - HEADERSIZE, 1, stdout);
|
||
|
fflush(stdout);
|
||
|
return 0;
|
||
|
}
|
||
|
|
||
|
int spitdir(char *path, char *prefix)
|
||
|
{
|
||
|
DIR *dp;
|
||
|
struct dirent *ep;
|
||
|
|
||
|
int prefixlen = strlen(prefix);
|
||
|
dp = opendir(path);
|
||
|
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;
|
||
|
}
|
||
|
if (ep->d_type != DT_DIR && ep->d_type != DT_REG) {
|
||
|
fprintf(stderr, "Only regular file or directories are supported\n");
|
||
|
return 1;
|
||
|
}
|
||
|
int slen = strlen(ep->d_name);
|
||
|
if (prefixlen + slen> MAX_FN_LEN) {
|
||
|
fprintf(stderr, "Filename too long: %s/%s\n", prefix, ep->d_name);
|
||
|
return 1;
|
||
|
}
|
||
|
char fullpath[0x1000];
|
||
|
strcpy(fullpath, path);
|
||
|
strcat(fullpath, "/");
|
||
|
strcat(fullpath, ep->d_name);
|
||
|
char newprefix[MAX_FN_LEN];
|
||
|
strcpy(newprefix, prefix);
|
||
|
if (prefixlen > 0) {
|
||
|
strcat(newprefix, "/");
|
||
|
}
|
||
|
strcat(newprefix, ep->d_name);
|
||
|
if (ep->d_type == DT_DIR) {
|
||
|
int r = spitdir(fullpath, newprefix);
|
||
|
if (r != 0) {
|
||
|
return r;
|
||
|
}
|
||
|
} else {
|
||
|
int r = spitblock(fullpath, newprefix);
|
||
|
if (r != 0) {
|
||
|
return r;
|
||
|
}
|
||
|
}
|
||
|
}
|
||
|
closedir(dp);
|
||
|
return 0;
|
||
|
}
|
||
|
|
||
|
int main(int argc, char *argv[])
|
||
|
{
|
||
|
if (argc != 2) {
|
||
|
fprintf(stderr, "Usage: cfspack /path/to/dir\n");
|
||
|
return 1;
|
||
|
}
|
||
|
char *srcpath = argv[1];
|
||
|
return spitdir(srcpath, "");
|
||
|
}
|
||
|
|