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88 lines
2.2 KiB
C
88 lines
2.2 KiB
C
/* Linux specific extensions to fpathconf.
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Copyright (C) 1991, 95, 96, 98, 99, 2000 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 Library General Public License as
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published by the Free Software Foundation; either version 2 of the
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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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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public
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License along with the GNU C Library; see the file COPYING.LIB. If not,
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write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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Boston, MA 02111-1307, USA. */
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#include <unistd.h>
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#include <limits.h>
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#include <sys/statfs.h>
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#include "linux_fsinfo.h"
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/* The Linux kernel header mentioned this as a kind of generic value. */
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#define LINUX_LINK_MAX 127
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static long int posix_fpathconf (int fd, int name);
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/* Get file-specific information about descriptor FD. */
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long int
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__fpathconf (fd, name)
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int fd;
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int name;
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{
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if (name == _PC_LINK_MAX)
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{
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struct statfs fsbuf;
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/* Determine the filesystem type. */
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if (__fstatfs (fd, &fsbuf) < 0)
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/* not possible, return the default value. */
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return LINUX_LINK_MAX;
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switch (fsbuf.f_type)
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{
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case EXT2_SUPER_MAGIC:
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return EXT2_LINK_MAX;
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case MINIX_SUPER_MAGIC:
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case MINIX_SUPER_MAGIC2:
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return MINIX_LINK_MAX;
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case MINIX2_SUPER_MAGIC:
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case MINIX2_SUPER_MAGIC2:
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return MINIX2_LINK_MAX;
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case XENIX_SUPER_MAGIC:
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return XENIX_LINK_MAX;
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case SYSV4_SUPER_MAGIC:
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case SYSV2_SUPER_MAGIC:
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return SYSV_LINK_MAX;
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case COH_SUPER_MAGIC:
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return COH_LINK_MAX;
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case UFS_MAGIC:
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case UFS_CIGAM:
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return UFS_LINK_MAX;
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case REISERFS_SUPER_MAGIC:
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return REISERFS_LINK_MAX;
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default:
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return LINUX_LINK_MAX;
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}
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}
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return posix_fpathconf (fd, name);
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}
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#define __fpathconf static posix_fpathconf
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#include <sysdeps/posix/fpathconf.c>
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