wanted source for some string functions

[Surekha Reddy Gaddam]

I would like to know if there is any public domain equivalent source 
for the following functions.

1. srchtxt - display contents of, or serch for a text string in, message
   data bases

2. addseverity - builds a list of severity levels for an application
   for use with fmtmsg
	Synopsis:  int addseverity( int severity, const char *string);

3. gettxt - retrieve a text string
	Synopsis: chat *gettxt( const *msgid, const char *dflt_str);

4. fmtmsg - display a message on stderr or system console

	int fmtmsg( long classification, const char *label, int severity,
		    const char *text, const char *action, const char *tag)

5. setlocale - modify and query a program's locale

	Synopsis:   char *setlocale( int category, const char * locale)

	* The above ones are Rel 4.0 Unix functions and would like to
	  get a public domain source equivalents if there are any.

	* Please e-mail your responses to me      gaddam at remus.rutgers.edu

Thanks a lot,

Surekha