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From: Tom Rhodes <trhodes@FreeBSD.org>
Date: Sat, 14 Jun 2003 06:41:31 -0700 (PDT)
To: src-committers@FreeBSD.org, cvs-src@FreeBSD.org,
	cvs-all@FreeBSD.org
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Subject: cvs commit: src/usr.bin/compress compress.c
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trhodes     2003/06/14 06:41:31 PDT

  FreeBSD src repository

  Modified files:
    usr.bin/compress     compress.c 
  Log:
  Don't truncate the output file before making sure that we can
  read at least 1 byte from the input file without problems.  This
  fixes a bug in uncompress(1) that causes the accidental removal
  of files that happen to have the same name as the output file,
  even when the uncompression fails and is aborted, i.e.:
  
  $ echo hello world > hello
  $ touch hello.Z
  $ ls -l hello*
  -rw-rw-r--  1 giorgos  giorgos  12 Jun 14 13:33 hello
  -rw-rw-r--  1 giorgos  giorgos   0 Jun 14 13:33 hello.Z
  $ ./uncompress -f hello
  uncompress: hello.Z: Inappropriate file type or format
  $ ls -l hello*
  -rw-rw-r--  1 giorgos  giorgos  0 Jun 14 13:33 hello.Z
  $
  
  PR:             46787
  Submitted by:   keramida
  
  Revision  Changes    Path
  1.21      +17 -6     src/usr.bin/compress/compress.c