Groups > comp.os.linux.development.apps > #462

Re: fopen() of a read-only file for writing?

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From	"Joe Shead" <Joe@SheadProgramming.com>
Newsgroups	comp.os.linux.development.apps
References	<s5KdnY85luiJChHSnZ2dnUVZ_uGdnZ2d@earthlink.com> <jmiu3v$is7$1@speranza.aioe.org>
Subject	Re: fopen() of a read-only file for writing?
Date	Wed, 18 Apr 2012 22:40:32 -0600
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I tested it, and it works. With a new non-root user, I got the EACCES that I
expected.

I'll just say, for anyone out there who wants to read my humble opinion,
that sometimes root wants to set things (like relatively stable C++ code, or
an initialization script) to read-only, so he knows that if he opens those
files to take a look, he can't easily accidentally modify them. If he wants
to change the file, he would actually like to be forced to do a chmod, make
the deliberate changes, and then chmod it back to read-only. I do that all
the time.

Thanks for the informed and comprehending help, though,

Joe

"Alan Curry" <pacman@kosh.dhis.org> wrote in message
news:jmiu3v$is7$1@speranza.aioe.org...
> In article <s5KdnY85luiJChHSnZ2dnUVZ_uGdnZ2d@earthlink.com>,
> Joe Shead <Joe@SheadProgramming.com> wrote:
> >
> >Hi,
> >
> >I have a file that has no write permissions on it, called readonly.txt.
> >I am logged on as root.
>
> Read and write permissions mean nothing to root.
>
> Execute permission does matter though. I suspect that's a holdover from
the
> time when it was common for $PATH to contain "." so there was more
potential
> to accidentally execute things.
>
> -- 
> Alan Curry

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Thread

fopen() of a read-only file for writing? "Joe Shead" <Joe@SheadProgramming.com> - 2012-04-16 17:03 -0600
  Re: fopen() of a read-only file for writing? pacman@kosh.dhis.org (Alan Curry) - 2012-04-17 05:12 +0000
    Re: fopen() of a read-only file for writing? "Joe Shead" <Joe@SheadProgramming.com> - 2012-04-17 01:36 -0600
    Re: fopen() of a read-only file for writing? "Joe Shead" <Joe@SheadProgramming.com> - 2012-04-18 22:40 -0600
      Re: fopen() of a read-only file for writing? Richard Kettlewell <rjk@greenend.org.uk> - 2012-04-19 08:57 +0100
      Re: fopen() of a read-only file for writing? Rainer Weikusat <rweikusat@mssgmbh.com> - 2012-04-19 14:18 +0100
      Re: fopen() of a read-only file for writing? Grant Edwards <invalid@invalid.invalid> - 2012-04-19 14:16 +0000
      Re: fopen() of a read-only file for writing? "Joe Shead" <Joe@SheadProgramming.com> - 2012-04-20 19:10 -0600
        Re: fopen() of a read-only file for writing? Richard Kettlewell <rjk@greenend.org.uk> - 2012-04-21 10:20 +0100
          Re: fopen() of a read-only file for writing? "Joe Shead" <Joe@SheadProgramming.com> - 2012-04-22 00:07 -0600
          Re: fopen() of a read-only file for writing? "Joe Shead" <Joe@SheadProgramming.com> - 2012-04-23 15:24 -0600

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