107 lines
2.1 KiB
C
107 lines
2.1 KiB
C
#include <stdio.h>
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#include <err.h>
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#include <fcntl.h>
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#include <string.h>
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#include <unistd.h>
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#include <zlib.h>
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static int find_section(const char *buf, size_t bufsize, const char *str) {
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int len = strlen(str);
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const char *p;
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if (len >= bufsize) return 0;
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p = strrchr(buf, '/');
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if (p++ == NULL) p = buf;
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return strncmp(p, str, len) == 0;
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}
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int main(void)
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{
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char obuf[8*1024], ibuf[8*1024];
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z_stream zs;
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int r = Z_OK, rc = 1, fd = -1;
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size_t len;
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if (inflateInit2(&zs, 15+32) != Z_OK)
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goto err;
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zs.avail_out = sizeof obuf;
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zs.next_out = (Bytef *)obuf;
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while (1) {
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const char *fn = NULL;
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if (zs.avail_in == 0) {
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zs.avail_in = read(STDIN_FILENO, ibuf, sizeof ibuf);
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zs.next_in = (Bytef *)ibuf;
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if (zs.avail_in < 0) {
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warn("Failed to read input");
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goto err;
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}
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if (zs.avail_in == 0 && r == Z_STREAM_END) goto ok;
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}
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r = inflate(&zs, Z_NO_FLUSH);
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if (r != Z_OK && r != Z_STREAM_END) {
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warnx("Failed to inflate input");
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goto err;
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}
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len = sizeof obuf - zs.avail_out;
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if (len) {
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if (fd < 0) {
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const char *fn;
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if (find_section(obuf, len, ".SIGN."))
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fn = "signatures.tar.gz";
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else if (find_section(obuf, len, ".PKGINFO"))
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fn = "control.tar.gz";
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else if (rc == 1)
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fn = "data.tar.gz", rc = 2;
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else {
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warnx("Failed to find .PKGINFO section");
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goto err;
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}
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fd = open(fn, O_CREAT|O_TRUNC|O_WRONLY, 0777);
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if (fd < 0) {
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warn("Failed to open %s", fn);
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goto err;
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}
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}
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zs.next_out = (Bytef *)obuf;
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zs.avail_out = sizeof obuf;
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}
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if (zs.avail_in == 0 || r == Z_STREAM_END) {
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len = (char *)zs.next_in - (char *)ibuf;
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if (write(fd, ibuf, len) != len) {
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warn("Failed to write to %s", fn);
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goto err;
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}
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memmove(ibuf, zs.next_in, zs.avail_in);
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zs.next_in = (Bytef *)ibuf;
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}
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if (r == Z_STREAM_END) {
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if (fd >= 0) {
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close(fd);
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fd = -1;
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}
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inflateEnd(&zs);
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if (inflateInit2(&zs, 15+32) != Z_OK) {
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warnx("inflateInit2 failed");
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goto err;
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}
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}
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}
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ok:
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rc = 0;
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err:
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if (fd >= 0) close(fd);
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inflateEnd(&zs);
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return rc;
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}
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