[thirdparty/glibc.git] / sysdeps / posix / fpathconf.c

/* Copyright (C) 1991, 1995, 1996 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., 675 Mass Ave,
Cambridge, MA 02139, USA.  */

#include <errno.h>
#include <stddef.h>
#include <unistd.h>
#include <limits.h>
#include <sys/statfs.h>


/* Get file-specific information about descriptor FD.  */
long int
__fpathconf (fd, name)
     int fd;
     int name;
{
  if (fd < 0)
    {
      __set_errno (EBADF);
      return -1;
    }

  switch (name)
    {
    default:
      __set_errno (EINVAL);
      return -1;

    case _PC_LINK_MAX:
#ifdef	LINK_MAX
      return LINK_MAX;
#else
      __set_errno (ENOSYS);
      return -1;
#endif

    case _PC_MAX_CANON:
#ifdef	MAX_CANON
      return MAX_CANON;
#else
      __set_errno (ENOSYS);
      return -1;
#endif

    case _PC_MAX_INPUT:
#ifdef	MAX_INPUT
      return MAX_INPUT;
#else
      __set_errno (ENOSYS);
      return -1;
#endif

    case _PC_NAME_MAX:
#ifdef	NAME_MAX
      return NAME_MAX;
#else
      __set_errno (ENOSYS);
      return -1;
#endif

    case _PC_PATH_MAX:
#ifdef	PATH_MAX
      {
	struct statfs buf;

	if (__fstatfs (fd, &buf) < 0)
	  return errno == ENOSYS ? PATH_MAX : -1;
	else
	  return buf.f_namelen;
      }
#else
      __set_errno (ENOSYS);
      return -1;
#endif

    case _PC_PIPE_BUF:
#ifdef	PIPE_BUF
      return PIPE_BUF;
#else
      __set_errno (ENOSYS);
      return -1;
#endif

    case _PC_CHOWN_RESTRICTED:
#ifdef	_POSIX_CHOWN_RESTRICTED
      return _POSIX_CHOWN_RESTRICTED;
#else
      return -1;
#endif

    case _PC_NO_TRUNC:
#ifdef	_POSIX_NO_TRUNC
      return _POSIX_NO_TRUNC;
#else
      return -1;
#endif

    case _PC_VDISABLE:
#ifdef	_POSIX_VDISABLE
      return _POSIX_VDISABLE;
#else
      return -1;
#endif

    case _PC_SYNC_IO:
#ifdef	_POSIX_SYNC_IO
      return _POSIX_SYNC_IO;
#else
      return -1;
#endif

    case _PC_ASYNC_IO:
#ifdef	_POSIX_ASYNC_IO
      return _POSIX_ASYNC_IO;
#else
      return -1;
#endif

    case _PC_PRIO_IO:
#ifdef	_POSIX_PRIO_IO
      return _POSIX_PRIO_IO;
#else
      return -1;
#endif

    case _PC_SOCK_MAXBUF:
#ifdef	SOCK_MAXBUF
      return SOCK_MAXBUF;
#else
      __set_errno (ENOSYS);
      return -1;
#endif
    }

  __set_errno (ENOSYS);
  return -1;
}

weak_alias (__fpathconf, fpathconf)
Commit	Line	Data
75cd5204	1	/* Copyright (C) 1991, 1995, 1996 Free Software Foundation, Inc.
28f540f4 RM	2	This file is part of the GNU C Library.
	3
	4	The GNU C Library is free software; you can redistribute it and/or
	5	modify it under the terms of the GNU Library General Public License as
	6	published by the Free Software Foundation; either version 2 of the
	7	License, or (at your option) any later version.
	8
	9	The GNU C Library is distributed in the hope that it will be useful,
	10	but WITHOUT ANY WARRANTY; without even the implied warranty of
	11	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	12	Library General Public License for more details.
	13
	14	You should have received a copy of the GNU Library General Public
	15	License along with the GNU C Library; see the file COPYING.LIB. If
	16	not, write to the Free Software Foundation, Inc., 675 Mass Ave,
	17	Cambridge, MA 02139, USA. */
	18
28f540f4 RM	19	#include <errno.h>
	20	#include <stddef.h>
	21	#include <unistd.h>
	22	#include <limits.h>
0e3426bb	23	#include <sys/statfs.h>
28f540f4 RM	24
	25
	26	/* Get file-specific information about descriptor FD. */
	27	long int
c4029823 UD	28	__fpathconf (fd, name)
	29	int fd;
	30	int name;
28f540f4 RM	31	{
	32	if (fd < 0)
	33	{
c4029823	34	__set_errno (EBADF);
28f540f4 RM	35	return -1;
	36	}
	37
	38	switch (name)
	39	{
	40	default:
c4029823	41	__set_errno (EINVAL);
28f540f4 RM	42	return -1;
	43
	44	case _PC_LINK_MAX:
	45	#ifdef LINK_MAX
	46	return LINK_MAX;
	47	#else
c4029823	48	__set_errno (ENOSYS);
28f540f4 RM	49	return -1;
	50	#endif
	51
	52	case _PC_MAX_CANON:
	53	#ifdef MAX_CANON
	54	return MAX_CANON;
	55	#else
c4029823	56	__set_errno (ENOSYS);
28f540f4 RM	57	return -1;
	58	#endif
	59
	60	case _PC_MAX_INPUT:
	61	#ifdef MAX_INPUT
	62	return MAX_INPUT;
	63	#else
c4029823	64	__set_errno (ENOSYS);
28f540f4 RM	65	return -1;
	66	#endif
	67
	68	case _PC_NAME_MAX:
	69	#ifdef NAME_MAX
	70	return NAME_MAX;
	71	#else
c4029823	72	__set_errno (ENOSYS);
28f540f4 RM	73	return -1;
	74	#endif
	75
	76	case _PC_PATH_MAX:
	77	#ifdef PATH_MAX
0e3426bb RM	78	{
	79	struct statfs buf;
	80
	81	if (__fstatfs (fd, &buf) < 0)
	82	return errno == ENOSYS ? PATH_MAX : -1;
	83	else
	84	return buf.f_namelen;
	85	}
28f540f4	86	#else
c4029823	87	__set_errno (ENOSYS);
28f540f4 RM	88	return -1;
	89	#endif
	90
	91	case _PC_PIPE_BUF:
	92	#ifdef PIPE_BUF
	93	return PIPE_BUF;
	94	#else
c4029823	95	__set_errno (ENOSYS);
28f540f4 RM	96	return -1;
	97	#endif
	98
	99	case _PC_CHOWN_RESTRICTED:
	100	#ifdef _POSIX_CHOWN_RESTRICTED
	101	return _POSIX_CHOWN_RESTRICTED;
	102	#else
	103	return -1;
	104	#endif
	105
	106	case _PC_NO_TRUNC:
	107	#ifdef _POSIX_NO_TRUNC
	108	return _POSIX_NO_TRUNC;
	109	#else
	110	return -1;
	111	#endif
	112
	113	case _PC_VDISABLE:
	114	#ifdef _POSIX_VDISABLE
	115	return _POSIX_VDISABLE;
	116	#else
	117	return -1;
	118	#endif
75cd5204 RM	119
	120	case _PC_SYNC_IO:
	121	#ifdef _POSIX_SYNC_IO
	122	return _POSIX_SYNC_IO;
	123	#else
	124	return -1;
	125	#endif
	126
	127	case _PC_ASYNC_IO:
	128	#ifdef _POSIX_ASYNC_IO
	129	return _POSIX_ASYNC_IO;
	130	#else
	131	return -1;
	132	#endif
	133
	134	case _PC_PRIO_IO:
	135	#ifdef _POSIX_PRIO_IO
	136	return _POSIX_PRIO_IO;
	137	#else
	138	return -1;
	139	#endif
503054c0 RM	140
	141	case _PC_SOCK_MAXBUF:
	142	#ifdef SOCK_MAXBUF
	143	return SOCK_MAXBUF;
	144	#else
c4029823	145	__set_errno (ENOSYS);
503054c0 RM	146	return -1;
503054c0 RM	147	#endif
28f540f4 RM	148	}
28f540f4 RM	149
c4029823	150	__set_errno (ENOSYS);
28f540f4 RM	151	return -1;
	152	}
	153
	154	weak_alias (__fpathconf, fpathconf)