static char rcsid[] = "@(#)$Id: gcos_name.c,v 5.3 1993/08/03 19:28:39 syd Exp $";

/*******************************************************************************
 *  The Elm Mail System  -  $Revision: 5.3 $   $State: Exp $
 *
 *			Copyright (c) 1988-1992 USENET Community Trust
 *			Copyright (c) 1986,1987 Dave Taylor
 *******************************************************************************
 * Bug reports, patches, comments, suggestions should be sent to:
 *
 *	Syd Weinstein, Elm Coordinator
 *	elm@DSI.COM			dsinc!elm
 *
 *******************************************************************************
 * $Log: gcos_name.c,v $
 * Revision 5.3  1993/08/03  19:28:39  syd
 * Elm tries to replace the system toupper() and tolower() on current
 * BSD systems, which is unnecessary.  Even worse, the replacements
 * collide during linking with routines in isctype.o.  This patch adds
 * a Configure test to determine whether replacements are really needed
 * (BROKE_CTYPE definition).  The <ctype.h> header file is now included
 * globally through hdrs/defs.h and the BROKE_CTYPE patchup is handled
 * there.  Inclusion of <ctype.h> was removed from *all* the individual
 * files, and the toupper() and tolower() routines in lib/opt_utils.c
 * were dropped.
 * From: chip@chinacat.unicom.com (Chip Rosenthal)
 *
 * Revision 5.2  1993/01/20  03:02:19  syd
 * Move string declarations to defs.h
 * From: Syd
 *
 * Revision 5.1  1992/10/03  22:41:36  syd
 * Initial checkin as of 2.4 Release at PL0
 *
 *
 ******************************************************************************/

/** 

**/

#include "headers.h"

char *
gcos_name(gcos_field, logname)
char *logname, *gcos_field;
{
    /** Return the full name found in a passwd file gcos field **/

#ifdef BERKNAMES

    static char fullname[SLEN];
    register char *fncp, *gcoscp, *lncp, *end;


    /* full name is all chars up to first ',' (or whole gcos, if no ',') */
    /* replace any & with logname in upper case */

    for(fncp = fullname, gcoscp= gcos_field, end = fullname + SLEN - 1;
        (*gcoscp != ',' && *gcoscp != '\0' && fncp != end);
	gcoscp++) {

	if(*gcoscp == '&') {
	    for(lncp = logname; *lncp; fncp++, lncp++)
		*fncp = toupper(*lncp);
	} else {
	    *fncp++ = *gcoscp;
	}
    }
    
    *fncp = '\0';
    return(fullname);
#else
#ifdef USGNAMES

    char *firstcp, *lastcp;

    /* The last character of the full name is the one preceding the first
     * '('. If there is no '(', then the full name ends at the end of the
     * gcos field.
     */
    if(lastcp = index(gcos_field, '('))
	*lastcp = '\0';

    /* The first character of the full name is the one following the 
     * last '-' before that ending character. NOTE: that's why we
     * establish the ending character first!
     * If there is no '-' before the ending character, then the fullname
     * begins at the beginning of the gcos field.
     */
    if(firstcp = rindex(gcos_field, '-'))
	firstcp++;
    else
	firstcp = gcos_field;

    return(firstcp);

#else
    /* use full gcos field */
    return(gcos_field);
#endif
#endif
}