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Chroot actually appeared in 7th Edition Unix.
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Authored by imp on Fri, Jun 26, 8:15 PM.

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Summary

Chroot appeared during the development of 7th edition Unix. The FreeBSD jail
documents, incorrectly, that Bill Joy added this to 4.2BSD on 18 March

  1. That was when Bill Joy converted from a statically coded system call glue

to dynamically generated assembler. Chroot was present in 32V, 3BSD, 4.0BSD, 4.1BSD
and 4.1cBSD well in advance of this.

See also:
V7: https://minnie.tuhs.org/cgi-bin/utree.pl?file=V7/usr/src/libc/sys/chroot.s
32V: https://minnie.tuhs.org/cgi-bin/utree.pl?file=32V/usr/src/libc/sys/chroot.s
3BSD: https://minnie.tuhs.org/cgi-bin/utree.pl?file=3BSD/usr/src/libc/sys/chroot.s
4BSD: https://minnie.tuhs.org/cgi-bin/utree.pl?file=4BSD/usr/src/libc/sys/chroot.s
4.1cBSD: https://minnie.tuhs.org/cgi-bin/utree.pl?file=4.1cBSD/usr/src/libc/sys/chroot.s

The 6th edition does not have this system call, nor does it have anything named
chroot in the tree available from TUHS.

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Event Timeline

imp created this revision.Fri, Jun 26, 8:15 PM
imp requested review of this revision.Fri, Jun 26, 8:15 PM
allanjude accepted this revision.Fri, Jun 26, 8:17 PM
allanjude added a reviewer: manpages.
allanjude added a subscriber: allanjude.

Reviewed by: allanjude

This revision is now accepted and ready to land.Fri, Jun 26, 8:18 PM
imp added a comment.Fri, Jun 26, 10:01 PM

Sent a similar thing to Kirk and he agrees.

This revision was automatically updated to reflect the committed changes.