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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>
52 lines
1.6 KiB
C
52 lines
1.6 KiB
C
/* Open a directory stream from a file descriptor. Hurd version.
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Copyright (C) 2005-2023 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<https://www.gnu.org/licenses/>. */
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#include <dirent.h>
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#include <errno.h>
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#include <hurd.h>
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#include <hurd/fd.h>
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#include <fcntl.h>
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DIR *_hurd_fd_opendir (struct hurd_fd *d); /* opendir.c */
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/* Open a directory stream on FD. */
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DIR *
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__fdopendir (int fd)
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{
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struct hurd_fd *d = _hurd_fd_get (fd);
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if (d == NULL)
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return __hurd_fail (EBADF), NULL;
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/* Ensure that it's a directory. */
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error_t err = HURD_FD_PORT_USE
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(d, ({
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file_t dir = __file_name_lookup_under (port, "./",
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O_DIRECTORY | O_NOTRANS, 0);;
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if (dir != MACH_PORT_NULL)
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__mach_port_deallocate (__mach_task_self (), dir);
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dir != MACH_PORT_NULL ? 0 : errno;
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}));
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if (err)
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return __hurd_dfail (fd, err), NULL;
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return _hurd_fd_opendir (d);
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}
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weak_alias (__fdopendir, fdopendir)
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