83 lines
2.0 KiB
C
83 lines
2.0 KiB
C
/* -*-comment-start: "//";comment-end:""-*-
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* GNU Mes --- Maxwell Equations of Software
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* Copyright (C) 1991-1996,98,2000,2001 Free Software Foundation, Inc.
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* Copyright © 2018 Jan (janneke) Nieuwenhuizen <janneke@gnu.org>
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*
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* This file is part of GNU Mes.
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*
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* GNU Mes is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 3 of the License, or (at
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* your option) any later version.
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*
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* GNU Mes is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with GNU Mes. If not, see <http://www.gnu.org/licenses/>.
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*/
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// Taken from GNU C Library 2.2.5
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#include <mes/lib.h>
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#include <errno.h>
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#include <limits.h>
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#include <stddef.h>
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#include <stdlib.h>
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#include <dirent.h>
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#include <fcntl.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <unistd.h>
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#include <stdio.h>
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#include <dirstream.h>
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/* Open a directory stream on NAME. */
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DIR *
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opendir (char const *name)
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{
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DIR *dirp;
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struct stat statbuf;
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int fd;
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size_t allocation;
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int save_errno;
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if (name[0] == '\0')
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{
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/* POSIX.1-1990 says an empty name gets ENOENT;
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but `open' might like it fine. */
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errno = ENOENT;
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return 0;
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}
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fd = open (name, O_RDONLY | O_DIRECTORY);
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if (fd < 0)
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return 0;
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if (fstat (fd, &statbuf) < 0)
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goto lose;
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if (fcntl (fd, F_SETFD, FD_CLOEXEC) < 0)
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goto lose;
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allocation = statbuf.st_blksize;
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dirp = (DIR *) calloc (1, sizeof (DIR) + allocation);
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if (!dirp)
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lose:
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{
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save_errno = errno;
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close (fd);
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errno = save_errno;
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return 0;
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}
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dirp->data = (char *) (dirp + 1);
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dirp->allocation = allocation;
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dirp->fd = fd;
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return dirp;
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}
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