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#include <stdio.h>
#include <fcntl.h>
#include <string.h>
#include <unistd.h>
#include <zlib.h>
int main(void)
{
char obuf[8*1024], ibuf[8*1024];
z_stream zs;
int r = Z_OK, rc = 1, fd = -1;
size_t len;
if (inflateInit2(&zs, 15+32) != Z_OK)
goto err;
zs.avail_out = sizeof obuf;
zs.next_out = obuf;
while (1) {
if (zs.avail_in == 0) {
zs.avail_in = read(STDIN_FILENO, ibuf, sizeof ibuf);
zs.next_in = ibuf;
if (zs.avail_in < 0) goto err;
if (zs.avail_in == 0 && r == Z_STREAM_END) goto ok;
}
r = inflate(&zs, Z_NO_FLUSH);
if (r != Z_OK && r != Z_STREAM_END) goto err;
len = sizeof obuf - zs.avail_out;
if (len) {
if (fd < 0) {
const char *fn;
if (strncmp(obuf, ".SIGN.", 6) == 0)
fn = "signatures.tar.gz";
else if (strncmp(obuf, ".PKGINFO", 8) == 0)
fn = "control.tar.gz";
else if (rc == 1)
fn = "data.tar.gz", rc = 2;
else
goto err;
fd = open(fn, O_CREAT|O_TRUNC|O_WRONLY, 0777);
if (fd < 0) goto err;
}
zs.next_out = obuf;
zs.avail_out = sizeof obuf;
}
if (zs.avail_in == 0 || r == Z_STREAM_END) {
len = (void *)zs.next_in - (void *)ibuf;
if (write(fd, ibuf, len) != len) goto err;
memmove(ibuf, zs.next_in, zs.avail_in);
zs.next_in = ibuf;
}
if (r == Z_STREAM_END) {
if (fd >= 0) {
close(fd);
fd = -1;
}
inflateEnd(&zs);
if (inflateInit2(&zs, 15+32) != Z_OK) goto err;
}
}
ok:
rc = 0;
err:
if (fd >= 0) close(fd);
inflateEnd(&zs);
if (rc) fprintf(stderr, "failed\n");
return rc;
}
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