Re (tilly) 3: Two-arg open() considered dangerous

in reply to Re (chip): Two-arg open() considered dangerous
in thread Two-arg open() considered dangerous

It is not guaranteed. From 'perldoc -f sysopen' on 5.005_03 I get:

=item sysopen FILEHANDLE,FILENAME,MODE

=item sysopen FILEHANDLE,FILENAME,MODE,PERMS

[ snip ]

The possible values and flag bits of the MODE parameter are
system-dependent; they are available via the standard module C<Fcntl>.
For historical reasons, some values work on almost every system
supported by perl: zero means read-only, one means write-only, and two
means read/write.  We know that these values do I<not> work under
OS/390 & VM/ESA Unix and on the Macintosh; you probably don't want to
use them in new code.
[download]

So those values probably work. But not always.

Comment on Re (tilly) 3: Two-arg open() considered dangerous Download Code

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Re (chip): Two-arg open() considered dangerous by chip (Curate) on Dec 12, 2001 at 03:58 UTC
Damn. I had no idea that there were systems that broken that could still run a modern Perl. -- Chip Salzenberg, Free-Floating Agent of Chaos	[reply]
(ichimunki) re: Two-arg open() considered dangerous by ichimunki (Priest) on Dec 13, 2001 at 04:46 UTC
Either way, it's more readable with the explicit constant names exported by Fcntl, which is good for all those coders coming to your code from a two-arg open() mentality/background.	[reply]

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