[ossec-list] string.h or strings.h

[Leslie S Arvin <arvin@xxxxxxxxxx>]

I've been installing ossec on Solaris, AIX, RedHat and working to
port ossec-hids to HP-UX.  The string.h vs. strings.h issue has been
making me crazy.  No matter which file I included I would get error
messages and the '-include string.h' CFLAG was not working for Solaris.
After analyzing which functions are included in which files, I decided to:

1. use '#include <string.h>' only.
2. convert all calls to index() and rindex() to strchr() and strrchr()
    respectively.

                 string.h        strings.h
------------------------------------------------------
AIX             index           index
                 strdup
                 strchr
------------------------------------------------------
RedHat          index           index
                 strdup
                 strchr
------------------------------------------------------
SOLARIS 8 & 9                   index
                 strdup
                 strchr
------------------------------------------------------
HPUX                            index
                 strdup
                 strchr

This made my compiler shut up.  But this may not work on other OSes.

According to www.gnu.org:

"Some systems give these functions the names index and rindex; other
systems use the names strchr and strrchr. Some systems support both
pairs of names, but neither pair works on all systems."
(http://www.gnu.org/prep/standards/html_node/System-Functions.html)

They recommend using strchr/strrchr and if they don't exist "define
them as macros in terms of the other pair."  Unfortunately, their
assumption that macros HAVE_STRCHR and HAVE_STRRCHR exist is invalid
under Solaris 8 at least.

So we'll have fun, fun, fun 'til the *nix puts the strchr() away.

-- Leslie Arvin
    arvin@xxxxxxxxxx, Office: FREH G409, Phone: 765-496-3971
    Network Systems Administrator, ITI-Unix Platforms
    Purdue University, Information Technology at Purdue

--~--~---------~--~----~------------~-------~--~----~
-~----------~----~----~----~------~----~------~--~---