After downloading fsck.c from v7addenda.tar.gz this happens:

w fsck.c
33044
q
# cc fsck.c
fsck.c:1441: s_dinfo undefined; func. makefree
fsck.c:1441: Illegal structure ref
fsck.c:1441: Incompatible structures
fsck.c:1442: Illegal structure ref
fsck.c:1442: Incompatible structures
fsck.c:1453: s_dinfo undefined; func. makefree
fsck.c:1453: Illegal structure ref
fsck.c:1453: Incompatible structures
fsck.c:1454: Illegal structure ref
fsck.c:1454: Incompatible structures

fsck.c lines of interest 1440-1455:

#define superblk sblk.b_un.b_fs

if(cylsize == 0 || stepsize == 0) {
step = superblk.s_dinfo[0];
cyl = superblk.s_dinfo[1];
}
else {
step = stepsize;
cyl = cylsize;
}
if(step > cyl || step <= 0 || cyl <= 0 || cyl > MAXCYL) {
error("Default free list spacing assumed\n");
step = STEPSIZE;
cyl = CYLSIZE;
}
superblk.s_dinfo[0] = step;
superblk.s_dinfo[1] = cyl;
clear(flg,sizeof(flg));

#define superblk sblk.b_un.b_fs

Ken


On Sat, Mar 4, 2023 at 4:07 AM Jonathan Gray <jsg@jsg.id.au> wrote:

> On Fri, Mar 03, 2023 at 01:22:00PM -0500, Noel Chiappa wrote:
> >     > From: Jonathan Gray
> >
> >     > That is close, but slightly different to the PWB fcheck.c
> >
> > Interesting. I wonder how 'fcheck' made it from CMU to Bell? Clem and I
> > discussed how it made it from CMU to MIT, and we think it was via Wayne
> > Gramlich, who'd been an undergrad at CMU, and then went to grad school
> at MIT.
>
> fcheck is from Hal Pierson at Bell according to
>
> https://wiki.tuhs.org/doku.php?id=misc:snippets:mert1
> https://www.tuhs.org/Archive/Distributions/USDL/CB_Unix/readme.txt
>


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