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Re: Warn when editing read-only files
From: |
Dan Jacobson |
Subject: |
Re: Warn when editing read-only files |
Date: |
Fri, 17 Nov 2023 10:37:27 +0800 |
>>>>> "ADD" == Antonio Diaz Diaz <antonio@gnu.org> writes:
ADD> How do you propose to implement such a warning while remaining
ADD> POSIX-compliant?
Let's examine ed's helpful messages. I bet not all are listed in POSIX
page either.
$ ed /tmp/zzz
/tmp/zzz: No such file or directory # Helpful!
a
www
.
w
4
q
$ chmod 0 /tmp/zzz
$ ed /tmp/zzz
/tmp/zzz: Permission denied # Good to know!
a
www
.
w
/tmp/zzz: Permission denied # Expected! Can't blame anybody.
?
q
?
q
$ chmod 444 /tmp/zzz #and perhaps chown somebody_else /tmp/zzz
$ ed /tmp/zzz #Ho hum, every thing looks good...
4
a
www
.
w
/tmp/zzz: Permission denied # What? Why didn't you (ed) warn me above, with
# e.g., "Read-only file"! ed knew all along that the file was booby
# trapped, but didn't have a "sliver of gratitude" to at least warn me.
# So only after a long careful painstaking edit, it turns out "you might
# as well send your edit to your grandmother, because you are not going
# to save it where you thought you were before you bothered to start in
# the first place."
- Warn when editing read-only files, Dan Jacobson, 2023/11/15
- Re: Warn when editing read-only files, John Cowan, 2023/11/15
- Re: Warn when editing read-only files, Antonio Diaz Diaz, 2023/11/16
- Re: Warn when editing read-only files,
Dan Jacobson <=
- Re: Warn when editing read-only files, Paul Jackson, 2023/11/17
- Re: Warn when editing read-only files, Dan Jacobson, 2023/11/17
- Re: Warn when editing read-only files, Antonio Diaz Diaz, 2023/11/17
- Re: Warn when editing read-only files, John Cowan, 2023/11/17
- Re: Warn when editing read-only files, Antonio Diaz Diaz, 2023/11/22
- Re: Warn when editing read-only files, Antonio Diaz Diaz, 2023/11/20