/*
* print the table of contents from the "central directory structure"
*/
static int
unztable(Biobuf *bin, char *file)
{
ZipHead zh;
int entries;
entries = findCDir(bin, file);
if(entries < 0)
return 0;
if(verbose > 1)
print("%d items in the archive\n", entries);
while(entries-- > 0){
if(setjmp(zjmp)){
free(zh.file);
return 0;
}
memset(&zh, 0, sizeof(zh));
if(!cheader(bin, &zh))
return 1;
if(wantFile(zh.file)){
if(verbose)
print("%-32s %10lu %s", zh.file, zh.uncsize, ctime(msdos2time(zh.modtime, zh.moddate)));
else
print("%s\n", zh.file);
if(verbose > 1){
print("\tmade by os %d vers %d.%d\n", zh.madeos, zh.madevers/10, zh.madevers % 10);
print("\textract by os %d vers %d.%d\n", zh.extos, zh.extvers/10, zh.extvers % 10);
print("\tflags %x\n", zh.flags);
print("\tmethod %d\n", zh.meth);
print("\tmod time %d\n", zh.modtime);
print("\tmod date %d\n", zh.moddate);
print("\tcrc %lx\n", zh.crc);
print("\tcompressed size %lu\n", zh.csize);
print("\tuncompressed size %lu\n", zh.uncsize);
print("\tinternal attributes %x\n", zh.iattr);
print("\texternal attributes %lx\n", zh.eattr);
print("\tstarts at %ld\n", zh.off);
}
}
free(zh.file);
zh.file = nil;
}
return 1;
}
/*
* extract files using the info in the central directory structure
*/
static int
unzip(Biobuf *bin, char *file)
{
ZipHead zh;
int64_t off;
int ok, eok, entries;
entries = findCDir(bin, file);
if(entries < 0)
return 0;
ok = 1;
while(entries-- > 0){
if(setjmp(zjmp)){
free(zh.file);
return 0;
}
memset(&zh, 0, sizeof(zh));
if(!cheader(bin, &zh))
return ok;
off = Boffset(bin);
if(wantFile(zh.file)){
if(Bseek(bin, zh.off, 0) < 0){
fprint(2, "unzip: can't seek to start of %s, skipping\n", zh.file);
ok = 0;
}else{
eok = unzipEntry(bin, &zh);
if(eok <= 0){
fprint(2, "unzip: skipping %s\n", zh.file);
ok = 0;
}
}
}
free(zh.file);
zh.file = nil;
if(Bseek(bin, off, 0) < 0){
fprint(2, "unzip: can't seek to start of next entry, terminating extraction\n");
return 0;
}
}
return ok;
}
void
populate(char *name)
{
char *p;
Fileinf f;
ZipHead zh;
int ok, entries;
crctab = mkcrctab(ZCrcPoly);
ok = inflateinit();
if(ok != FlateOk)
sysfatal("inflateinit failed: %s", flateerr(ok));
bin = Bopen(name, OREAD);
if (bin == nil)
error("Can't open argument file");
entries = findCDir(bin);
if(entries < 0)
sysfatal("empty file");
while(entries-- > 0){
memset(&zh, 0, sizeof(zh));
if(!cheader(bin, &zh))
break;
f.addr = zh.off;
if(zh.iattr & IS_TEXT)
f.addr |= High64;
f.mode = (zh.madevers == IS_MSDOS && zh.eattr & IS_RDONLY)? 0444: 0644;
if (zh.meth == 0 && zh.uncsize == 0){
p = strchr(zh.file, '\0');
if(p > zh.file && p[-1] == '/')
f.mode |= (DMDIR | 0111);
}
f.uid = 0;
f.gid = 0;
f.size = zh.uncsize;
f.mdate = msdos2time(zh.modtime, zh.moddate);
f.name = zh.file + ((zh.file[0] == '/')? 1: 0);
poppath(f, 1);
free(zh.file);
}
return ;
}
