/******************************************************************
 *
 *  char *
 *  G_whoami()
 *
 *  Returns a string containing the name of the current user.
 *
 *  Try getlogin() first, then go to paswd file
 *  However, some masscomp getlogin() fails in ucb universe
 *  This is because the ttyname(0) rotuine fails in ucb universe.
 *  So check for this too.
 *
 *****************************************************************/
#include <unistd.h>
#include <stdlib.h>

#ifndef __MINGW32__
#include <pwd.h>
#endif

#include <grass/gis.h>


/*!
 * \brief user's name
 *
 * Returns a pointer to a string which is
 * the user's login name.
 *
 *  \param ~
 *  \return char * 
 */

char *G_whoami(void)
{
#ifdef __MINGW32__
    char *name =  getenv("USERNAME");
    if (name == NULL){
        name = "user_name";
    }
#else
    static char *name= 0;
#ifdef COMMENTED_OUT
    char *getlogin();
    char *ttyname();

    if (name == NULL)
    {
	char *x;
	x = ttyname(0);
	if (x && *x)
	{
	    x = getlogin();
	    if (x && *x)
		name = G_store (x);
	}
    }
#endif /* COMMENTED_OUT */

    if (name == NULL)
    {
	struct passwd *getpwuid();
	struct passwd *p;
	if((p = getpwuid (getuid())))
	    name = G_store (p->pw_name);
    }
    if (name == NULL)
	name = G_store ("?");

#endif
    return name;
}