[TUHS] compiling v9sh

[arnold at skeeve.com]

No, it's based on his work to make the shell use malloc. The paper
describing the work is included in the tarball.

Arnold

Rob Pike <robpike at gmail.com> wrote:

> Is that version still using the interrupt trick? I can't remember if I
> ripped that out for (sad) portability reasons.
>
> -rob
>
>
> On Tue, Feb 11, 2020 at 6:47 PM <arnold at skeeve.com> wrote:
>
> > For anyone who's interested, here is what it took to compile Geoff
> > Collyer's v9sh on Ubuntu 18.04.
> >
> > Arnold
> > ----------------------------------
> > diff -ur v9sh/error.c v9sh-new/error.c
> > --- v9sh/error.c        2017-07-29 11:45:07.000000000 +0300
> > +++ v9sh-new/error.c    2020-02-10 17:31:33.275920947 +0200
> > @@ -24,7 +24,7 @@
> >         }
> >         if (per) {
> >                 prs(colon);
> > -               prs(errno < 0 || errno >= sys_nerr? "Bad errno":
> > sys_errlist[errno]);
> > +               prs(strerror(errno));
> >         }
> >         newline();
> >         exitsh(ERROR);
> > diff -ur v9sh/pathserv.c v9sh-new/pathserv.c
> > --- v9sh/pathserv.c     2017-07-29 12:06:25.000000000 +0300
> > +++ v9sh-new/pathserv.c 2020-02-10 17:29:43.666971083 +0200
> > @@ -30,7 +30,7 @@
> >  {
> >         struct stat buf;
> >
> > -       if (stat(name, &buf) == 0 && (buf.st_mode&S_IFMT) == S_IFREG &&
> > +       if (stat(name, &buf) == 0 && S_ISREG(buf.st_mode) &&
> >             access(name, EXECUTE) == 0)
> >                 return 0;
> >         else
> > diff -ur v9sh/xec.c v9sh-new/xec.c
> > --- v9sh/xec.c  2017-07-29 12:27:02.000000000 +0300
> > +++ v9sh-new/xec.c      2020-02-10 17:29:50.607030967 +0200
> > @@ -612,7 +612,7 @@
> >
> >                         if (flags&ttyflg && (dir1 = spname(tempdir,
> > &score)) &&
> >                             stat(dir1, &sb) == 0 &&
> > -                           (sb.st_mode&S_IFMT) == S_IFDIR &&
> > +                           S_ISDIR(sb.st_mode) &&
> >                             access(dir1, EXECUTE) == 0) {
> >                                 /* dir1 is a searchable directory. */
> >                                 if (score < bestscore) {
> >