Geografic-Information-System/lib/gis/home.c

/*
 ****************************************************************
 * char *
 * G_home ()
 *
 *   returns char pointer to home directory for user
 *   dies if can't determine
 *
 * char *
 * G__home()
 *
 *   returns char pointer to home directory for user
 *   NULL if can't determine
 *
 ***************************************************************/
#include <stdlib.h>
#include <string.h>
#include <grass/gis.h>
#include <grass/glocale.h>


/*!
 * \brief user's home directory
 *
 * Returns a pointer to a string
 * which is the full path name of the user's home directory.
 *
 *  \param ~
 *  \return char * 
 */

const char *G_home(void)
{
    const char *home = G__home();

    if (home)
	return home;

    G_fatal_error(_("unable to determine user's home directory"));
    return NULL;
}

const char *G__home(void)
{
    static int initialized;
    static const char *home = 0;

    if (G_is_initialized(&initialized))
	return home;

#ifdef __MINGW32__
    {
	char buf[GPATH_MAX];

	/* TODO: we should probably check if the dir exists */
	home = getenv("USERPROFILE");

	if (!home) {
	    sprintf(buf, "%s%s", getenv("HOMEDRIVE"), getenv("HOMEPATH"));

	    if (strlen(buf) >= 0)
		home = G_store(buf);
	}

	if (!home)
	    home = getenv("HOME");
    }
#else
    home = getenv("HOME");
#endif
    G_debug(2, "G__home home = %s", home);
    G_initialize_done(&initialized);
    return home;
}