mapset_msc.c

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#include <string.h>
#include <unistd.h>
#include <stdlib.h>
#include <errno.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <grass/gis.h>
#include <grass/glocale.h>

int G__make_mapset_element(const char *p_element)
{
    char path[GPATH_MAX];
    char *p;
    const char *element;

    element = p_element;
    if (*element == 0)
        return 0;

    G__file_name(p = path, "", "", G_mapset());
    while (*p)
        p++;
    /* add trailing slash if missing */
    --p;
    if (*p++ != '/') {
        *p++ = '/';
        *p = 0;
    }

    /* now append element, one directory at a time, to path */
    while (1) {
        if (*element == '/' || *element == 0) {
            *p = 0;
            if (access(path, 0) != 0) { /* directory not yet created */
                if (G_mkdir(path) != 0)
                    G_fatal_error(_("Unable to make mapset element %s (%s): %s"),
                                  p_element, path, strerror(errno));
            }
            if (access(path, 0) != 0)  /* directory not accessible */
                G_fatal_error(_("Unable to access mapset element %s (%s): %s"),
                              p_element, path, strerror(errno));
            if (*element == 0)
                return 1;
        }
        *p++ = *element++;
    }
}

int G__make_mapset_element_misc(const char *dir, const char *name)
{
    char buf[GNAME_MAX * 2 + 1];

    sprintf(buf, "%s/%s", dir, name);
    return G__make_mapset_element(buf);
}

static int check_owner(const struct stat *info)
{
#if defined(__MINGW32__) || defined(SKIP_MAPSET_OWN_CHK)
    return 1;
#else
    const char *check = getenv("GRASS_SKIP_MAPSET_OWNER_CHECK");
    if (check && *check)
        return 1;
    if (info->st_uid != getuid())
        return 0;
    if (info->st_uid != geteuid())
        return 0;
    return 1;
#endif
}

int G__mapset_permissions(const char *mapset)
{
    char path[GPATH_MAX];
    struct stat info;

    G__file_name(path, "", "", mapset);

    if (G_stat(path, &info) != 0)
        return -1;
    if (!S_ISDIR(info.st_mode))
        return -1;

    if (!check_owner(&info))
        return 0;

    return 1;
}

int G__mapset_permissions2(const char *gisdbase, const char *location,
                           const char *mapset)
{
    char path[GPATH_MAX];
    struct stat info;

    sprintf(path, "%s/%s/%s", gisdbase, location, mapset);

    if (G_stat(path, &info) != 0)
        return -1;
    if (!S_ISDIR(info.st_mode))
        return -1;

    if (!check_owner(&info))
        return 0;

    return 1;
}