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Differential D25475

Chroot actually appeared in 7th Edition Unix.
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Authored by imp on Jun 26 2020, 8:15 PM.
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rS362664: Chroot actually appeared in 7th Edition Unix.
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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rS FreeBSD src repository - subversion
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Event Timeline

imp created this revision.Jun 26 2020, 8:15 PM
Harbormaster completed remote builds in B31989: Diff 73710.Jun 26 2020, 8:15 PM
imp requested review of this revision.Jun 26 2020, 8:15 PM
allanjude accepted this revision.Jun 26 2020, 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.Jun 26 2020, 8:18 PM
imp added a comment.Jun 26 2020, 10:01 PM

Sent a similar thing to Kirk and he agrees.

Closed by commit rS362664: Chroot actually appeared in 7th Edition Unix. (authored by imp). · Explain WhyJun 26 2020, 10:05 PM
This revision was automatically updated to reflect the committed changes.
imp added a commit: rS362664: Chroot actually appeared in 7th Edition Unix..

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PathSize
head/
lib/
libc/
sys/
4 lines

Diff 73720

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head/lib/libc/sys/chroot.2

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