[SCM] GNU Autoconf source repository branch, master, updated. v2.65-19-g6c11abd

[Eric Blake]

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- Log -----------------------------------------------------------------
commit 6c11abd6fcb523b1c9d3d39a8fe0191761a2918b
Author: Bruno Haible <address@hidden>
Date:   Thu Dec 31 06:50:44 2009 -0700

    Improve documentation on Solaris tr bugs.
    
    * doc/autoconf.texi (Limitations of Usual Tools) <tr>: Refine
    description of NUL handling by Solaris tr.
    
    Signed-off-by: Eric Blake <address@hidden>

-----------------------------------------------------------------------

Summary of changes:
 ChangeLog         |    6 ++++++
 doc/autoconf.texi |   31 +++++++++++++++++++++----------
 2 files changed, 27 insertions(+), 10 deletions(-)

diff --git a/ChangeLog b/ChangeLog
index b0a4474..0143989 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,9 @@
+2009-12-31  Bruno Haible  <address@hidden>
+
+       Improve documentation on Solaris tr bugs.
+       * doc/autoconf.texi (Limitations of Usual Tools) <tr>: Refine
+       description of NUL handling by Solaris tr.
+
 2009-12-31  Eric Blake  <address@hidden>
 
        Another tr tweak.
diff --git a/doc/autoconf.texi b/doc/autoconf.texi
index 6e1356e..df4c584 100644
--- a/doc/autoconf.texi
+++ b/doc/autoconf.texi
@@ -18347,20 +18347,31 @@ add
 @end example
 
 Posix requires @command{tr} to operate on binary files.  But at least
-Solaris @command{/usr/ucb/tr} fails to handle @samp{\0} as the octal
-escape for @code{NUL}, and Solaris @command{/usr/bin/tr} silently
-discards @code{NUL} in the input prior to doing any translation.  When
-using @command{tr} to process a binary file that may contain @code{NUL}
-bytes, it is necessary to use @command{/usr/xpg4/bin/tr} instead, or
+Solaris @command{/usr/ucb/tr} and @command{/usr/bin/tr} silently discard
address@hidden in the input prior to doing any translation.  When using
address@hidden to process a binary file that may contain @code{NUL} bytes,
+it is necessary to use @command{/usr/xpg4/bin/tr} instead, or
 @command{/usr/xpg6/bin/tr} if that is available.
 
 @example
-$ @kbd{printf 'ab\0c' | /usr/ucb/tr 'a\0' '\0d' | od -An -tx1}
+$ @kbd{printf 'a\0b' | /usr/ucb/tr x x | od -An -tx1}
+ 61 62
+$ @kbd{printf 'a\0b' | /usr/bin/tr x x | od -An -tx1}
+ 61 62
+$ @kbd{printf 'a\0b' | /usr/xpg4/bin/tr x x | od -An -tx1}
+ 61 00 62
address@hidden example
+
+Solaris @command{/usr/ucb/tr} additionally fails to handle @samp{\0} as the
+octal escape for @code{NUL}.
+
address@hidden
+$ @kbd{printf 'abc' | /usr/ucb/tr 'bc' '\0d' | od -An -tx1}
  61 62 63
-$ @kbd{printf 'ab\0c' | /usr/bin/tr 'a\0' '\0d' | od -An -tx1}
- 00 62 63
-$ @kbd{printf 'ab\0c' | /usr/xpg4/bin/tr 'a\0' '\0d' | od -An -tx1}
- 00 62 64 63
+$ @kbd{printf 'abc' | /usr/bin/tr 'bc' '\0d' | od -An -tx1}
+ 61 00 64
+$ @kbd{printf 'abc' | /usr/xpg4/bin/tr 'bc' '\0d' | od -An -tx1}
+ 61 00 64
 @end example
 
 @end table


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