minix/external/bsd/nvi/docs/internals/autowrite
Lionel Sambuc 84d9c625bf Synchronize on NetBSD-CVS (2013/12/1 12:00:00 UTC)
- Fix for possible unset uid/gid in toproto
 - Fix for default mtree style
 - Update libelf
 - Importing libexecinfo
 - Resynchronize GCC, mpc, gmp, mpfr
 - build.sh: Replace params with show-params.
     This has been done as the make target has been renamed in the same
     way, while a new target named params has been added. This new
     target generates a file containing all the parameters, instead of
     printing it on the console.
 - Update test48 with new etc/services (Fix by Ben Gras <ben@minix3.org)
     get getservbyport() out of the inner loop

Change-Id: Ie6ad5226fa2621ff9f0dee8782ea48f9443d2091
2014-07-28 17:05:06 +02:00

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# @(#)autowrite 8.3 (Berkeley) 2/17/95
Vi autowrite behavior, the fields with *'s are "don't cares".
=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
Commands that are affected only by autowrite:
Command File Autowrite? Action:
modified?
-----------------------------------------------
^Z Y Y Write file and suspend.
^Z Y N Suspend.
^Z N * Suspend.
# This behavior is NOT identical to :edit.
^^ Y Y Write file and jump.
^^ Y N Error.
^^ N * Jump.
# The new nvi command ^T (:tagpop) behaves identically to ^].
# This behavior is identical to :tag, :tagpop, and :tagpush with
# force always set to N.
^] Y Y Write file and jump.
^] Y N Error.
^] N * Jump.
# There's no way to specify a force flag to the '!' command.
:! Y Y Write file and execute.
:! Y N Warn (if warn option) and execute.
:! N * Execute.
=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
Commands that are affected by both autowrite and force:
NOTE: the "force" flag is never passed on, i.e. the write
to the file caused by the autowrite flag is never forced.
Command File Autowrite? Force? Action:
modified? (!)
-------------------------------------------------------
# The first rule (YYY) is historic practice, but seems wrong.
# In nvi, :next and :prev commands behave identically to :rewind.
:next Y Y Y Write changes and jump.
:next Y Y N Write changes and jump.
:next Y N Y Abandon changes and jump.
:next Y N N Error.
:next N * * Jump.
:rewind Y Y Y Abandon changes and jump.
:rewind Y Y N Write changes and jump.
:rewind Y N Y Abandon changes and jump.
:rewind Y N N Error.
:rewind N * * Jump.
# The new nvi commands, :tagpop and :tagtop, behave identically to :tag.
# Note, this behavior is the same as :rewind and friends, as well.
:tag Y Y Y Abandon changes and jump.
:tag Y Y N Write changes and jump.
:tag Y N Y Abandon changes and jump.
:tag Y N N Error.
:tag N * * Jump.
# The command :suspend behaves identically to :stop.
:stop Y Y Y Suspend.
:stop Y Y N Write changes and suspend.
:stop Y N Y Suspend.
:stop Y N N Suspend.
:stop N * * Suspend.
=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
Commands that might be affected by autowrite, but aren't:
Command File Autowrite? Force? Action:
modified? (!)
-------------------------------------------------------
#:ex, and :vi (executed while in vi mode) behave identically to :edit.
:edit Y * Y Abandon changes and jump.
:edit Y * N Error.
:edit N * * Jump.
:quit Y * Y Quit.
:quit Y * N Error.
:quit N * * Quit.
:shell * * * Execute shell.
:xit Y * * Write changes and exit.
:xit N * * Exit.