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70 lines
1.9 KiB
C
70 lines
1.9 KiB
C
/* Test for access to file, relative to open directory. Hurd version.
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Copyright (C) 2006-2015 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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<http://www.gnu.org/licenses/>. */
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#include <errno.h>
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#include <fcntl.h>
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#include <stddef.h>
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#include <unistd.h>
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#include <sys/types.h>
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#include <hurd.h>
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#include <hurd/fd.h>
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int
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faccessat (fd, file, type, flag)
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int fd;
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const char *file;
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int type;
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int flag;
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{
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error_t err;
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file_t port;
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int allowed, flags;
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if ((flag & AT_EACCESS) == 0)
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{
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if (fd == AT_FDCWD || file[0] == '/')
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return __access (file, type);
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__set_errno (ENOTSUP); /* XXX later */
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return -1;
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}
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port = __file_name_lookup_at (fd, flag &~ AT_EACCESS, file, 0, 0);
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if (port == MACH_PORT_NULL)
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return -1;
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/* Find out what types of access we are allowed to this file. */
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err = __file_check_access (port, &allowed);
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__mach_port_deallocate (__mach_task_self (), port);
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if (err)
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return __hurd_fail (err);
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flags = 0;
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if (type & R_OK)
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flags |= O_READ;
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if (type & W_OK)
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flags |= O_WRITE;
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if (type & X_OK)
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flags |= O_EXEC;
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if (flags & ~allowed)
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/* We are not allowed all the requested types of access. */
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return __hurd_fail (EACCES);
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return 0;
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}
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