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We should distinguish between a real truncated case and EOF after

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BZ_STREAM_END triggered re-init.  Do it by introducing a new flag
to represent the 'cold' case after bzip2 state is reinitialized.

This fixes regression reported on -current@ as well as another one
I found during twiddling with gzip.

Reported by:	swell.k gmail.com
MFC after:	1 week
This commit is contained in:
Xin LI 2009-11-16 22:52:52 +00:00
parent f46b45a4a8
commit a0b4046b01
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=199339
1 changed files with 14 additions and 3 deletions
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17
usr.bin/gzip/unbzip2.c
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@ -36,7 +36,7 @@
static off_t
unbzip2(int in, int out, char *pre, size_t prelen, off_t *bytes_in)
{
int ret, end_of_file;
int ret, end_of_file, cold = 0;
off_t bytes_out = 0;
bz_stream bzs;
static char *inbuf, *outbuf;
@ -86,8 +86,18 @@ unbzip2(int in, int out, char *pre, size_t prelen, off_t *bytes_in)
switch (ret) {
case BZ_STREAM_END:
case BZ_OK:
if (ret == BZ_OK && end_of_file)
maybe_err("read");
if (ret == BZ_OK && end_of_file) {
/*
* If we hit this after a stream end, consider
* it as the end of the whole file and don't
* bail out.
*/
if (cold == 1)
ret = BZ_STREAM_END;
else
maybe_errx("truncated file");
}
cold = 0;
if (!tflag && bzs.avail_out != BUFLEN) {
ssize_t n;
@ -100,6 +110,7 @@ unbzip2(int in, int out, char *pre, size_t prelen, off_t *bytes_in)
if (BZ2_bzDecompressEnd(&bzs) != BZ_OK ||
BZ2_bzDecompressInit(&bzs, 0, 0) != BZ_OK)
maybe_errx("bzip2 re-init");
cold = 1;
ret = BZ_OK;
}
break;