mirror of
https://sourceware.org/git/glibc.git
synced 2025-10-28 23:34:53 +03:00
c200ecdff4
2001-03-20 Ulrich Drepper <drepper@redhat.com> * sysdeps/unix/sysv/linux/pathconf.c (__pathconf): Return LINUX_LINK_MAX only if the statfs function is not implemented for the filesystem. * sysdeps/unix/sysv/linux/fpathconf.c (__fpathconf): Return LINUX_LINK_MAX only if the fstatfs function is not implemented for the filesystem.
95 lines
2.3 KiB
C
95 lines
2.3 KiB
C
/* Linux specific extensions to fpathconf.
|
|
Copyright (C) 1991,95,96,98,99,2000,2001 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 Library General Public License as
|
|
published by the Free Software Foundation; either version 2 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
|
|
Library General Public License for more details.
|
|
|
|
You should have received a copy of the GNU Library General Public
|
|
License along with the GNU C Library; see the file COPYING.LIB. If not,
|
|
write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
|
|
Boston, MA 02111-1307, USA. */
|
|
|
|
#include <errno.h>
|
|
#include <unistd.h>
|
|
#include <limits.h>
|
|
#include <sys/statfs.h>
|
|
|
|
#include "linux_fsinfo.h"
|
|
|
|
|
|
/* The Linux kernel header mentioned this as a kind of generic value. */
|
|
#define LINUX_LINK_MAX 127
|
|
|
|
static long int posix_fpathconf (int fd, int name);
|
|
|
|
|
|
/* Get file-specific information about descriptor FD. */
|
|
long int
|
|
__fpathconf (fd, name)
|
|
int fd;
|
|
int name;
|
|
{
|
|
if (name == _PC_LINK_MAX)
|
|
{
|
|
struct statfs fsbuf;
|
|
|
|
/* Determine the filesystem type. */
|
|
if (__fstatfs (fd, &fsbuf) < 0)
|
|
{
|
|
if (errno == ENOSYS)
|
|
/* not possible, return the default value. */
|
|
return LINUX_LINK_MAX;
|
|
|
|
/* Some error occured. */
|
|
return -1;
|
|
}
|
|
|
|
switch (fsbuf.f_type)
|
|
{
|
|
case EXT2_SUPER_MAGIC:
|
|
return EXT2_LINK_MAX;
|
|
|
|
case MINIX_SUPER_MAGIC:
|
|
case MINIX_SUPER_MAGIC2:
|
|
return MINIX_LINK_MAX;
|
|
|
|
case MINIX2_SUPER_MAGIC:
|
|
case MINIX2_SUPER_MAGIC2:
|
|
return MINIX2_LINK_MAX;
|
|
|
|
case XENIX_SUPER_MAGIC:
|
|
return XENIX_LINK_MAX;
|
|
|
|
case SYSV4_SUPER_MAGIC:
|
|
case SYSV2_SUPER_MAGIC:
|
|
return SYSV_LINK_MAX;
|
|
|
|
case COH_SUPER_MAGIC:
|
|
return COH_LINK_MAX;
|
|
|
|
case UFS_MAGIC:
|
|
case UFS_CIGAM:
|
|
return UFS_LINK_MAX;
|
|
|
|
case REISERFS_SUPER_MAGIC:
|
|
return REISERFS_LINK_MAX;
|
|
|
|
default:
|
|
return LINUX_LINK_MAX;
|
|
}
|
|
}
|
|
|
|
return posix_fpathconf (fd, name);
|
|
}
|
|
|
|
#define __fpathconf static posix_fpathconf
|
|
#include <sysdeps/posix/fpathconf.c>
|