MFC r310718:

bzip2 does not exit after showing license as requested with --version
or --license as most apps would do, instead it waits for data to
compress on stdin. Because of that, if `bzip2 --version' is called,
bogus `bzip2: I won't write compressed data to a terminal' error
message will be displayed, and checking for bzip2 version in scripts
as in

    bzip2 --version 2>&1 | grep -o "Version [^,]*"

will hand as bzip2 would wait for data to compress on stdin. Fix
this by exiting right after showing version/license text.

I've tried to push this upstream for more than a year, but author
is unresponsive, so upstream may be considered dead.

Ubuntu applies similar fix, for the note.

PR:		199443
Approved by:	dim, bapt
Differential Revision:	D8924

1 files changed, 5 insertions, 3 deletions

diff --git a/contrib/bzip2/bzip2.c b/contrib/bzip2/bzip2.c
index 6de9d1d..e6e8369 100644
--- a/contrib/bzip2/bzip2.c
+++ b/contrib/bzip2/bzip2.c
@@ -1890,7 +1890,9 @@ IntNative main ( IntNative argc, Char *argv[] )
                case '8': blockSize100k    = 8; break;
                case '9': blockSize100k    = 9; break;
                case 'V':
-               case 'L': license();            break;
+               case 'L': license();
+                         exit ( 0 );
+                         break;
                case 'v': verbosity++; break;
                case 'h': usage ( progName );
                          exit ( 0 );
@@ -1916,8 +1918,8 @@ IntNative main ( IntNative argc, Char *argv[] )
       if (ISFLAG("--keep"))              keepInputFiles   = True;    else
       if (ISFLAG("--small"))             smallMode        = True;    else
       if (ISFLAG("--quiet"))             noisy            = False;   else
-      if (ISFLAG("--version"))           license();                  else
-      if (ISFLAG("--license"))           license();                  else
+      if (ISFLAG("--version"))           { license(); exit ( 0 ); }  else
+      if (ISFLAG("--license"))           { license(); exit ( 0 ); }  else
       if (ISFLAG("--exponential"))       workFactor = 1;             else 
       if (ISFLAG("--repetitive-best"))   redundant(aa->name);        else
       if (ISFLAG("--repetitive-fast"))   redundant(aa->name);        else