mirror of
https://sourceware.org/git/glibc.git
synced 2024-09-20 00:19:57 +00:00
9ec31e5727
The __hurd_fail () inline function is the dedicated, idiomatic way of
reporting errors in the Hurd part of glibc. Not only is it more concise
than '{ errno = err; return -1; }', it is since commit
6639cc1002
"hurd: Mark error functions as __COLD" marked with the cold attribute,
telling the compiler that this codepath is unlikely to be executed.
In one case, use __hurd_dfail () over the plain __hurd_fail ().
Signed-off-by: Sergey Bugaev <bugaevc@gmail.com>
Message-Id: <20230520115531.3911877-1-bugaevc@gmail.com>
53 lines
1.8 KiB
C
53 lines
1.8 KiB
C
/* Copyright (C) 1991-2023 Free Software Foundation, Inc.
|
|
|
|
This file is part of the GNU C Library.
|
|
|
|
The GNU C Library is free software; you can redistribute it and/or
|
|
modify it under the terms of the GNU Lesser General Public
|
|
License as published by the Free Software Foundation; either
|
|
version 2.1 of the License, or (at your option) any later version.
|
|
|
|
The GNU C Library is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
Lesser General Public License for more details.
|
|
|
|
You should have received a copy of the GNU Lesser General Public
|
|
License along with the GNU C Library; if not, see
|
|
<https://www.gnu.org/licenses/>. */
|
|
|
|
#include <hurd.h>
|
|
|
|
/* This is initialized in dtable.c when that gets linked in.
|
|
If dtable.c is not linked in, it will be zero. */
|
|
static file_t (*_default_hurd_getdport_fn) (int fd) = 0;
|
|
weak_alias (_default_hurd_getdport_fn, _hurd_getdport_fn)
|
|
|
|
file_t
|
|
__getdport (int fd)
|
|
{
|
|
if (_hurd_getdport_fn)
|
|
/* dtable.c has defined the function to fetch a port from the real file
|
|
descriptor table. */
|
|
return (*_hurd_getdport_fn) (fd);
|
|
|
|
/* getdport is the only use of file descriptors,
|
|
so we don't bother allocating a real table. */
|
|
|
|
if (_hurd_init_dtable == NULL)
|
|
/* Never had a descriptor table. */
|
|
return __hurd_fail (EBADF), MACH_PORT_NULL;
|
|
|
|
if (fd < 0 || (unsigned int) fd > _hurd_init_dtablesize
|
|
|| _hurd_init_dtable[fd] == MACH_PORT_NULL)
|
|
return __hurd_fail (EBADF), MACH_PORT_NULL;
|
|
else
|
|
{
|
|
__mach_port_mod_refs (__mach_task_self (), _hurd_init_dtable[fd],
|
|
MACH_PORT_RIGHT_SEND, 1);
|
|
return _hurd_init_dtable[fd];
|
|
}
|
|
}
|
|
|
|
weak_alias (__getdport, getdport)
|