Subversion Repositories planix.SVN

#include <u.h>
#include <libc.h>
#include <fcall.h>

enum
{
        DIRSIZE = STATFIXLEN + 16 * 4           /* enough for encoded stat buf + some reasonable strings */
};

Dir*
dirstat(char *name)
{
        Dir *d;
        uchar *buf;
        int n, nd, i;

        nd = DIRSIZE;
        for(i=0; i<2; i++){     /* should work by the second try */
                d = malloc(sizeof(Dir) + BIT16SZ + nd);
                if(d == nil)
                        return nil;
                buf = (uchar*)&d[1];
                n = stat(name, buf, BIT16SZ+nd);
                if(n < BIT16SZ){
                        free(d);
                        return nil;
                }
                nd = GBIT16((uchar*)buf);       /* upper bound on size of Dir + strings */
                if(nd <= n){
                        convM2D(buf, n, d, (char*)&d[1]);
                        return d;
                }
                /* else sizeof(Dir)+BIT16SZ+nd is plenty */
                free(d);
        }
        return nil;
}