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int
do_dirop(optype,stab,gimme,arglast)
int optype;
STAB *stab;
int gimme;
int *arglast;
{
#if defined(DIRENT) && defined(HAS_READDIR)
register ARRAY *ary = stack;
register STR **st = ary->ary_array;
register int sp = arglast[1];
register STIO *stio;
long along;
#ifndef apollo
struct DIRENT *readdir();
#endif
register struct DIRENT *dp;
if (!stab)
goto nope;
if (!(stio = stab_io(stab)))
stio = stab_io(stab) = stio_new();
if (!stio->dirp && optype != O_OPEN_DIR)
goto nope;
st[sp] = &str_yes;
switch (optype) {
case O_OPEN_DIR:
if (stio->dirp)
closedir(stio->dirp);
if (!(stio->dirp = opendir(str_get(st[sp+1]))))
goto nope;
break;
case O_READDIR:
if (gimme == G_ARRAY) {
--sp;
/*SUPPRESS 560*/
while (dp = readdir(stio->dirp)) {
#ifdef DIRNAMLEN
(void)astore(ary,++sp,
str_2mortal(str_make(dp->d_name,dp->d_namlen)));
#else
(void)astore(ary,++sp,
str_2mortal(str_make(dp->d_name,0)));
#endif
}
}
else {
if (!(dp = readdir(stio->dirp)))
goto nope;
st[sp] = str_mortal(&str_undef);
#ifdef DIRNAMLEN
str_nset(st[sp], dp->d_name, dp->d_namlen);
#else
str_set(st[sp], dp->d_name);
#endif
}
break;
#if defined(HAS_TELLDIR) || defined(telldir)
case O_TELLDIR: {
#ifndef telldir
long telldir();
#endif
st[sp] = str_mortal(&str_undef);
str_numset(st[sp], (double)telldir(stio->dirp));
break;
}
#endif
#if defined(HAS_SEEKDIR) || defined(seekdir)
case O_SEEKDIR:
st[sp] = str_mortal(&str_undef);
along = (long)str_gnum(st[sp+1]);
(void)seekdir(stio->dirp,along);
break;
#endif
#if defined(HAS_REWINDDIR) || defined(rewinddir)
case O_REWINDDIR:
st[sp] = str_mortal(&str_undef);
(void)rewinddir(stio->dirp);
break;
#endif
case O_CLOSEDIR:
st[sp] = str_mortal(&str_undef);
(void)closedir(stio->dirp);
stio->dirp = 0;
break;
default:
goto phooey;
}
return sp;
nope:
st[sp] = &str_undef;
if (!errno)
errno = EBADF;
return sp;
#endif
phooey:
fatal("Unimplemented directory operation");
}
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