is.c

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#include <stdio.h>
#include <string.h>
#include <unistd.h>
#include <grass/gis.h>


static int test_path_file(const char *, const char *);


static int test_path_file(const char *path, const char *file)
{
    int ret;
    char *buf;

    buf = (char *)G_malloc(strlen(path) + strlen(file) + 2);
    sprintf(buf, "%s/%s", path, file);

    ret = access(buf, F_OK);
    G_free(buf);

    if (ret == 0)
        return 1;

    return 0;
}


int G_is_gisbase(const char *path)
{
    return test_path_file(path, "etc/element_list");
}


int G_is_location(const char *path)
{
    return test_path_file(path, "PERMANENT/DEFAULT_WIND");
}


int G_is_mapset(const char *path)
{
    return test_path_file(path, "WIND");
}