[thirdparty/glibc.git] / sysdeps / unix / sysv / linux / pathconf.h

/* Common parts of Linux implementation of pathconf and fpathconf.
   Copyright (C) 1991,1995,1996,1998-2002,2003 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 Lesser General Public
   License as published by the Free Software Foundation; either
   version 2.1 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
   Lesser General Public License for more details.

   You should have received a copy of the GNU Lesser General Public
   License along with the GNU C Library; if not, write to the Free
   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
   02111-1307 USA.  */

#include <unistd.h>
#include <errno.h>
#include <sys/statfs.h>
#include "linux_fsinfo.h"


/* Used like: return statfs_link_max (__statfs (name, &buf), &buf); */
static inline long int
statfs_link_max (int result, const struct statfs *fsbuf)
{
  if (result < 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;

    case XFS_SUPER_MAGIC:
      return XFS_LINK_MAX;

    default:
      return LINUX_LINK_MAX;
    }
}


/* Used like: return statfs_filesize_max (__statfs (name, &buf), &buf); */
static inline long int
statfs_filesize_max (int result, const struct statfs *fsbuf)
{
  if (result < 0)
    {
      if (errno == ENOSYS)
	/* Not possible, return the default value.  */
	return 32;

      /* Some error occured.  */
      return -1;
    }

  switch (fsbuf->f_type)
    {
    case EXT2_SUPER_MAGIC:
    case UFS_MAGIC:
    case UFS_CIGAM:
    case REISERFS_SUPER_MAGIC:
    case XFS_SUPER_MAGIC:
    case SMB_SUPER_MAGIC:
    case NTFS_SUPER_MAGIC:
    case UDF_SUPER_MAGIC:
    case JFS_SUPER_MAGIC:
      return 64;

    case MSDOS_SUPER_MAGIC:
    case JFFS_SUPER_MAGIC:
    case JFFS2_SUPER_MAGIC:
    case NCP_SUPER_MAGIC:
    case ROMFS_SUPER_MAGIC:
      return 32;

    default:
      return 32;
    }
}


/* Used like: return statfs_link_max (__statfs (name, &buf), &buf); */
static inline long int
statfs_symlinks (int result, const struct statfs *fsbuf)
{
  if (result < 0)
    {
      if (errno == ENOSYS)
	/* Not possible, return the default value.  */
	return 1;

      /* Some error occured.  */
      return -1;
    }

  switch (fsbuf->f_type)
    {
    case ADFS_SUPER_MAGIC:
    case BFS_MAGIC:
    case CRAMFS_MAGIC:
    case DEVPTS_SUPER_MAGIC:
    case EFS_SUPER_MAGIC:
    case EFS_MAGIC:
    case MSDOS_SUPER_MAGIC:
    case NTFS_SUPER_MAGIC:
    case QNX4_SUPER_MAGIC:
    case ROMFS_SUPER_MAGIC:
      /* No symlink support.  */
      return 0;

    default:
      return 1;
    }
}
Commit	Line	Data
0d83b42e	1	/* Common parts of Linux implementation of pathconf and fpathconf.
564cd8b6	2	Copyright (C) 1991,1995,1996,1998-2002,2003 Free Software Foundation, Inc.
0d83b42e RM	3	This file is part of the GNU C Library.
	4
	5	The GNU C Library is free software; you can redistribute it and/or
	6	modify it under the terms of the GNU Lesser General Public
	7	License as published by the Free Software Foundation; either
	8	version 2.1 of the License, or (at your option) any later version.
	9
	10	The GNU C Library is distributed in the hope that it will be useful,
	11	but WITHOUT ANY WARRANTY; without even the implied warranty of
	12	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	13	Lesser General Public License for more details.
	14
	15	You should have received a copy of the GNU Lesser General Public
	16	License along with the GNU C Library; if not, write to the Free
	17	Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
	18	02111-1307 USA. */
	19
	20	#include <unistd.h>
	21	#include <errno.h>
	22	#include <sys/statfs.h>
	23	#include "linux_fsinfo.h"
	24
0d83b42e	25
564cd8b6	26	/* Used like: return statfs_link_max (__statfs (name, &buf), &buf); */
69c708ed	27	static inline long int
0d83b42e RM	28	statfs_link_max (int result, const struct statfs *fsbuf)
	29	{
	30	if (result < 0)
	31	{
	32	if (errno == ENOSYS)
	33	/* Not possible, return the default value. */
	34	return LINUX_LINK_MAX;
	35
	36	/* Some error occured. */
	37	return -1;
	38	}
	39
	40	switch (fsbuf->f_type)
	41	{
	42	case EXT2_SUPER_MAGIC:
	43	return EXT2_LINK_MAX;
	44
	45	case MINIX_SUPER_MAGIC:
	46	case MINIX_SUPER_MAGIC2:
	47	return MINIX_LINK_MAX;
	48
	49	case MINIX2_SUPER_MAGIC:
	50	case MINIX2_SUPER_MAGIC2:
	51	return MINIX2_LINK_MAX;
	52
	53	case XENIX_SUPER_MAGIC:
	54	return XENIX_LINK_MAX;
	55
	56	case SYSV4_SUPER_MAGIC:
	57	case SYSV2_SUPER_MAGIC:
	58	return SYSV_LINK_MAX;
	59
	60	case COH_SUPER_MAGIC:
	61	return COH_LINK_MAX;
	62
	63	case UFS_MAGIC:
	64	case UFS_CIGAM:
	65	return UFS_LINK_MAX;
	66
	67	case REISERFS_SUPER_MAGIC:
	68	return REISERFS_LINK_MAX;
	69
	70	case XFS_SUPER_MAGIC:
	71	return XFS_LINK_MAX;
	72
	73	default:
	74	return LINUX_LINK_MAX;
	75	}
	76	}
69c708ed	77
69c708ed	78
564cd8b6	79	/* Used like: return statfs_filesize_max (__statfs (name, &buf), &buf); */
69c708ed RM	80	static inline long int
	81	statfs_filesize_max (int result, const struct statfs *fsbuf)
	82	{
	83	if (result < 0)
	84	{
	85	if (errno == ENOSYS)
	86	/* Not possible, return the default value. */
	87	return 32;
	88
	89	/* Some error occured. */
	90	return -1;
	91	}
	92
	93	switch (fsbuf->f_type)
	94	{
	95	case EXT2_SUPER_MAGIC:
	96	case UFS_MAGIC:
	97	case UFS_CIGAM:
	98	case REISERFS_SUPER_MAGIC:
	99	case XFS_SUPER_MAGIC:
	100	case SMB_SUPER_MAGIC:
	101	case NTFS_SUPER_MAGIC:
	102	case UDF_SUPER_MAGIC:
	103	case JFS_SUPER_MAGIC:
	104	return 64;
	105
	106	case MSDOS_SUPER_MAGIC:
	107	case JFFS_SUPER_MAGIC:
	108	case JFFS2_SUPER_MAGIC:
	109	case NCP_SUPER_MAGIC:
	110	case ROMFS_SUPER_MAGIC:
	111	return 32;
	112
	113	default:
	114	return 32;
	115	}
	116	}
564cd8b6 UD	117
	118
	119	/* Used like: return statfs_link_max (__statfs (name, &buf), &buf); */
	120	static inline long int
	121	statfs_symlinks (int result, const struct statfs *fsbuf)
	122	{
	123	if (result < 0)
	124	{
	125	if (errno == ENOSYS)
	126	/* Not possible, return the default value. */
	127	return 1;
	128
	129	/* Some error occured. */
	130	return -1;
	131	}
	132
	133	switch (fsbuf->f_type)
	134	{
	135	case ADFS_SUPER_MAGIC:
	136	case BFS_MAGIC:
	137	case CRAMFS_MAGIC:
	138	case DEVPTS_SUPER_MAGIC:
	139	case EFS_SUPER_MAGIC:
	140	case EFS_MAGIC:
	141	case MSDOS_SUPER_MAGIC:
	142	case NTFS_SUPER_MAGIC:
	143	case QNX4_SUPER_MAGIC:
	144	case ROMFS_SUPER_MAGIC:
	145	/* No symlink support. */
	146	return 0;
	147
	148	default:
	149	return 1;
	150	}
	151	}