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

/**********************************************************************
 *
 *   char *
 *   G_mapset()
 *
 *   returns:    pointer to string containing the one word mapset
 *               name.
 *               NULL if user does not have access to mapset.
 *
 **********************************************************************/

#include <string.h>
#include <stdlib.h>
#include <grass/gis.h>
#include <grass/glocale.h>


/*!
 * \brief current mapset name
 *
 * Returns the name of the
 * current mapset in the current location. This routine is often used when
 * accessing files in the current mapset. See Mapsets for an
 * explanation of mapsets.
 *
 *  \param void
 *  \return char * 
 */

char *G_mapset(void)
{
    static char mapset[GMAPSET_MAX];
    static int first = 1;
    char *m;

    m = G__mapset();
    if (m == NULL)
	G_fatal_error(_("MAPSET is not set"));

    if (first)
	first = 0;
    else if (strcmp(mapset, m) == 0)
	return mapset;
    strcpy(mapset, m);

    switch (G__mapset_permissions(mapset)) {
    case 0:
    case 1:
	return mapset;
	/*
	   case 0:
	   G_fatal_error ("MAPSET %s - permission denied", mapset);
	   break;
	 */
    default:
	G_fatal_error(_("MAPSET %s not found"), mapset);
	break;
    }
    exit(EXIT_FAILURE);
}

char *G__mapset(void)
{
    return G__getenv("MAPSET");
}