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#include "lib.h"
#include <string.h>
#include <stdlib.h>
#include "sys9.h"
#include "dir.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); /* size needed to store whole stat buffer */
if(nd <= n){
_convM2D(buf, n, d, (char*)&d[1]);
return d;
}
/* else sizeof(Dir)+BIT16SZ+nd is plenty */
free(d);
}
return nil;
}
int
_dirwstat(char *name, Dir *d)
{
uchar *buf;
int r;
r = _sizeD2M(d);
buf = malloc(r);
if(buf == nil)
return -1;
_convD2M(d, buf, r);
r = _WSTAT(name, buf, r);
free(buf);
return r;
}
Dir*
_dirfstat(int fd)
{
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) + nd);
if(d == nil)
return nil;
buf = (uchar*)&d[1];
n = _FSTAT(fd, buf, nd);
if(n < BIT16SZ){
free(d);
return nil;
}
nd = GBIT16(buf); /* size needed to store whole stat buffer */
if(nd <= n){
_convM2D(buf, n, d, (char*)&d[1]);
return d;
}
/* else sizeof(Dir)+nd is plenty */
free(d);
}
return nil;
}
int
_dirfwstat(int fd, Dir *d)
{
uchar *buf;
int r;
r = _sizeD2M(d);
buf = malloc(r);
if(buf == nil)
return -1;
_convD2M(d, buf, r);
r = _FWSTAT(fd, buf, r);
free(buf);
return r;
}
void
_nulldir(Dir *d)
{
memset(d, ~0, sizeof(Dir));
d->name = d->uid = d->gid = d->muid = "";
}
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