From: "Érico Nogueira" <ericonr@disroot.org>
To: "Florian Weimer" <fweimer@redhat.com>,
"Érico Nogueira via Libc-alpha" <libc-alpha@sourceware.org>
Subject: Re: [RFC] linux: use __fd_to_filename helper function instead of snprintf.
Date: Tue, 27 Apr 2021 10:06:57 -0300 [thread overview]
Message-ID: <8c701d36-6b1c-8c5b-2a56-793c2def663f@disroot.org> (raw)
In-Reply-To: <87h7jsp6ma.fsf@oldenburg.str.redhat.com>
Em 27/04/2021 03:46, Florian Weimer escreveu:
> * Érico Nogueira via Libc-alpha:
>
>> diff --git a/sysdeps/unix/sysv/linux/fexecve.c b/sysdeps/unix/sysv/linux/fexecve.c
>> index f37c245396..218337a3b5 100644
>> --- a/sysdeps/unix/sysv/linux/fexecve.c
>> +++ b/sysdeps/unix/sysv/linux/fexecve.c
>> @@ -22,6 +22,7 @@
>> #include <fcntl.h>
>> #include <sys/stat.h>
>>
>> +#include <fd_to_filename.h>
>> #include <sysdep.h>
>> #include <sys/syscall.h>
>> #include <kernel-features.h>
>> @@ -50,8 +51,8 @@ fexecve (int fd, char *const argv[], char *const envp[])
>> #ifndef __ASSUME_EXECVEAT
>> /* We use the /proc filesystem to get the information. If it is not
>> mounted we fail. */
>> - char buf[sizeof "/proc/self/fd/" + sizeof (int) * 3];
>> - __snprintf (buf, sizeof (buf), "/proc/self/fd/%d", fd);
>> + struct fd_to_filename filename;
>> + char *buf = fd_to_filename(fd, &filename);
>
> Sorry, this patch fails to build if applied to current master:
I hadn't commited the fix from my work tree, sorry.
>
> ../sysdeps/unix/sysv/linux/fexecve.c: In function ‘fexecve’:
> ../sysdeps/unix/sysv/linux/fexecve.c:55:15: error: implicit declaration of function ‘fd_to_filename’ [-Werror=implicit-function-declaration]
> 55 | char *buf = fd_to_filename(fd, &filename);
> | ^~~~~~~~~~~~~~
>
> Please also add a space before the opening '(', to match GNU style, and
> consider if the code becomes clearer if you avoid the buf variable.
I think it's basically as clear as, but a bit more compact, so I will
use that instead. Thanks!
>
> Thanks,
> Florian
>
prev parent reply other threads:[~2021-04-27 13:07 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-04-27 3:09 Érico Nogueira
2021-04-27 6:46 ` Florian Weimer
2021-04-27 13:06 ` Érico Nogueira [this message]
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