From: Ricardo Wurmus <rekado@elephly.net>
To: Bengt Richter <bokr@bokr.com>
Cc: 44186@debbugs.gnu.org, d@divoplade.fr, zimon.toutoune@gmail.com
Subject: bug#44186: Recursive mkdir
Date: Sun, 25 Oct 2020 08:45:21 +0100 [thread overview]
Message-ID: <87h7qi3g1a.fsf@elephly.net> (raw)
In-Reply-To: <20201025041350.GA14747@LionPure>
Bengt Richter <bokr@bokr.com> writes:
> Hi divoplade,
>
> On +2020-10-24 08:17:47 +0200, divoplade wrote:
>> Hello,
>>
>> Le samedi 24 octobre 2020 à 01:32 +0200, Bengt Richter a écrit :
>> > An alternate solution could be programmed using ffi, as documented in
>> > [1], n'est-ce pas?
>> To be clear, you would rather have that function as guile code rather
>> than extending the C function? I'm OK with that, but in which file
>> should I put that function? My instinct was to put the code near the
>> mkdir function, and that happened to be in a C file, so I went C.
We should all be writing fewer lines of C code and more Scheme :)
> Seems logical, and probably where I'd go, but please be careful!
> Don't make a C version of this hack:
> ┌───────────────────────────────────────────────────────────────────────────────┐
> │ (define (my-mkdir-p path . ignore) (system (string-append "mkdir -p " path))) │
> └───────────────────────────────────────────────────────────────────────────────┘
> You can then write (my-mkdir-p "foo-dir/bar-dir") and it'll do the job.
>
> But it's definitely safer to skip the hack and write
> ┌─────────────────────────────────────┐
> │ (system "mkdir -p foo-dir/bar-dir") │
> └─────────────────────────────────────┘
> and not give anything a chance to inject something bad via unsanitized
> parameters.
Use “system*” instead of “system” when you need to work with
user-provided values. For mkdir-p, however, using any variant of
“system” is inelegant.
--
Ricardo
next prev parent reply other threads:[~2020-10-25 7:45 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <6ff632f5c1e378647cecc7177b7018fb8a0ee6d4.camel@divoplade.fr>
[not found] ` <86sga420pw.fsf@gmail.com>
2020-10-23 22:00 ` bug#44186: Recursive mkdir divoplade
2020-10-23 22:07 ` zimoun
2020-10-23 23:32 ` Bengt Richter
2020-10-24 6:17 ` divoplade
2020-10-25 4:13 ` Bengt Richter
2020-10-25 7:45 ` Ricardo Wurmus [this message]
2020-10-25 9:07 ` divoplade
2020-10-25 10:44 ` divoplade
[not found] ` <handler.44186.B.16034904223692.ack@debbugs.gnu.org>
2020-10-23 22:46 ` divoplade
2020-10-26 21:05 ` Leo Prikler
2020-10-27 7:01 ` divoplade
2020-10-27 9:19 ` Leo Prikler
2020-10-27 10:21 ` divoplade
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