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pax(1): Fix a bug with archives smaller than 512 bytes.

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The problem here is that the archive is too short (< 512 bytes). The
buffer routines, try to read at least 512 bytes, even when we try to
determine what format file we have, which is wrong.

Obtained from:	NetBSD (CVS rev 1.26)
MFC after:	5 days
This commit is contained in:
Pedro F. Giffuni 2016-12-21 15:26:59 +00:00
parent 33e7ba9cf9
commit 8ad81aaea6
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=310367
1 changed files with 4 additions and 1 deletions
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5
bin/pax/buf_subs.c
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@ -852,10 +852,13 @@ buf_fill(void)
/*
* errors require resync, EOF goes to next archive
* but in case we have not determined yet the format,
* this means that we have a very short file, so we
* are done again.
*/
if (cnt < 0)
break;
if (ar_next() < 0) {
if (frmt == NULL || ar_next() < 0) {
fini = 1;
return(0);
}