[thirdparty/glibc.git] / sysdeps / unix / sysv / linux / xstatconv.c

/* Convert between the kernel's `struct stat' format, and libc's.
   Copyright (C) 1991-2017 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, see
   <http://www.gnu.org/licenses/>.  */

#include <errno.h>
#include <sys/stat.h>
#include <kernel_stat.h>
#include <kernel-features.h>

#ifdef STAT_IS_KERNEL_STAT

/* Dummy.  */
struct kernel_stat;

#else

#include <string.h>


#if XSTAT_IS_XSTAT64
int
__xstat_conv (int vers, struct kernel_stat *kbuf, void *ubuf)
{
  switch (vers)
    {
    case _STAT_VER_KERNEL:
      /* Nothing to do.  The struct is in the form the kernel expects.
         We should have short-circuted before we got here, but for
         completeness... */
      *(struct kernel_stat *) ubuf = *kbuf;
      break;

    case _STAT_VER_LINUX:
      {
	struct stat *buf = ubuf;

	/* Convert to current kernel version of `struct stat'.  */
	buf->st_dev = kbuf->st_dev;
#ifdef _HAVE_STAT___PAD1
	buf->__pad1 = 0;
#endif
	buf->st_ino = kbuf->st_ino;
	buf->st_mode = kbuf->st_mode;
	buf->st_nlink = kbuf->st_nlink;
	buf->st_uid = kbuf->st_uid;
	buf->st_gid = kbuf->st_gid;
	buf->st_rdev = kbuf->st_rdev;
#ifdef _HAVE_STAT___PAD2
	buf->__pad2 = 0;
#endif
	buf->st_size = kbuf->st_size;
	buf->st_blksize = kbuf->st_blksize;
	buf->st_blocks = kbuf->st_blocks;
#ifdef _HAVE_STAT_NSEC
	buf->st_atim.tv_sec = kbuf->st_atim.tv_sec;
	buf->st_atim.tv_nsec = kbuf->st_atim.tv_nsec;
	buf->st_mtim.tv_sec = kbuf->st_mtim.tv_sec;
	buf->st_mtim.tv_nsec = kbuf->st_mtim.tv_nsec;
	buf->st_ctim.tv_sec = kbuf->st_ctim.tv_sec;
	buf->st_ctim.tv_nsec = kbuf->st_ctim.tv_nsec;
#else
	buf->st_atime = kbuf->st_atime;
	buf->st_mtime = kbuf->st_mtime;
	buf->st_ctime = kbuf->st_ctime;
#endif
#ifdef _HAVE_STAT___UNUSED1
	buf->__glibc_reserved1 = 0;
#endif
#ifdef _HAVE_STAT___UNUSED2
	buf->__glibc_reserved2 = 0;
#endif
#ifdef _HAVE_STAT___UNUSED3
	buf->__glibc_reserved3 = 0;
#endif
#ifdef _HAVE_STAT___UNUSED4
	buf->__glibc_reserved4 = 0;
#endif
#ifdef _HAVE_STAT___UNUSED5
	buf->__glibc_reserved5 = 0;
#endif
      }
      break;

    default:
      return INLINE_SYSCALL_ERROR_RETURN_VALUE (EINVAL);
    }

  return 0;
}
#endif

int
__xstat64_conv (int vers, struct kernel_stat *kbuf, void *ubuf)
{
#if XSTAT_IS_XSTAT64
  return __xstat_conv (vers, kbuf, ubuf);
#else
  switch (vers)
    {
    case _STAT_VER_LINUX:
      {
	struct stat64 *buf = ubuf;

	/* Convert to current kernel version of `struct stat64'.  */
	buf->st_dev = kbuf->st_dev;
#ifdef _HAVE_STAT64___PAD1
	buf->__pad1 = 0;
#endif
	buf->st_ino = kbuf->st_ino;
#ifdef _HAVE_STAT64___ST_INO
	buf->__st_ino = kbuf->st_ino;
#endif
	buf->st_mode = kbuf->st_mode;
	buf->st_nlink = kbuf->st_nlink;
	buf->st_uid = kbuf->st_uid;
	buf->st_gid = kbuf->st_gid;
	buf->st_rdev = kbuf->st_rdev;
#ifdef _HAVE_STAT64___PAD2
	buf->__pad2 = 0;
#endif
	buf->st_size = kbuf->st_size;
	buf->st_blksize = kbuf->st_blksize;
	buf->st_blocks = kbuf->st_blocks;
#ifdef _HAVE_STAT64_NSEC
	buf->st_atim.tv_sec = kbuf->st_atim.tv_sec;
	buf->st_atim.tv_nsec = kbuf->st_atim.tv_nsec;
	buf->st_mtim.tv_sec = kbuf->st_mtim.tv_sec;
	buf->st_mtim.tv_nsec = kbuf->st_mtim.tv_nsec;
	buf->st_ctim.tv_sec = kbuf->st_ctim.tv_sec;
	buf->st_ctim.tv_nsec = kbuf->st_ctim.tv_nsec;
#else
	buf->st_atime = kbuf->st_atime;
	buf->st_mtime = kbuf->st_mtime;
	buf->st_ctime = kbuf->st_ctime;
#endif
#ifdef _HAVE_STAT64___UNUSED1
	buf->__glibc_reserved1 = 0;
#endif
#ifdef _HAVE_STAT64___UNUSED2
	buf->__glibc_reserved2 = 0;
#endif
#ifdef _HAVE_STAT64___UNUSED3
	buf->__glibc_reserved3 = 0;
#endif
#ifdef _HAVE_STAT64___UNUSED4
	buf->__glibc_reserved4 = 0;
#endif
#ifdef _HAVE_STAT64___UNUSED5
	buf->__glibc_reserved5 = 0;
#endif
      }
      break;

      /* If struct stat64 is different from struct stat then
	 _STAT_VER_KERNEL does not make sense.  */
    case _STAT_VER_KERNEL:
    default:
      return INLINE_SYSCALL_ERROR_RETURN_VALUE (EINVAL);
    }

  return 0;
#endif
}

int
__xstat32_conv (int vers, struct stat64 *kbuf, struct stat *buf)
{
  switch (vers)
    {
    case _STAT_VER_LINUX:
      {
	/* Convert current kernel version of `struct stat64' to
           `struct stat'.  */
	buf->st_dev = kbuf->st_dev;
#ifdef _HAVE_STAT___PAD1
	buf->__pad1 = 0;
#endif
#ifdef _HAVE_STAT64___ST_INO
# if !__ASSUME_ST_INO_64_BIT
	if (kbuf->st_ino == 0)
	  buf->st_ino = kbuf->__st_ino;
	else
# endif
	  {
	    buf->st_ino = kbuf->st_ino;
	    if (sizeof (buf->st_ino) != sizeof (kbuf->st_ino)
		&& buf->st_ino != kbuf->st_ino)
	      return INLINE_SYSCALL_ERROR_RETURN_VALUE (EOVERFLOW);
	  }
#else
	buf->st_ino = kbuf->st_ino;
	if (sizeof (buf->st_ino) != sizeof (kbuf->st_ino)
	    && buf->st_ino != kbuf->st_ino)
	  return INLINE_SYSCALL_ERROR_RETURN_VALUE (EOVERFLOW);
#endif
	buf->st_mode = kbuf->st_mode;
	buf->st_nlink = kbuf->st_nlink;
	buf->st_uid = kbuf->st_uid;
	buf->st_gid = kbuf->st_gid;
	buf->st_rdev = kbuf->st_rdev;
#ifdef _HAVE_STAT___PAD2
	buf->__pad2 = 0;
#endif
	buf->st_size = kbuf->st_size;
	/* Check for overflow.  */
	if (sizeof (buf->st_size) != sizeof (kbuf->st_size)
	    && buf->st_size != kbuf->st_size)
	  return INLINE_SYSCALL_ERROR_RETURN_VALUE (EOVERFLOW);
	buf->st_blksize = kbuf->st_blksize;
	buf->st_blocks = kbuf->st_blocks;
	/* Check for overflow.  */
	if (sizeof (buf->st_blocks) != sizeof (kbuf->st_blocks)
	    && buf->st_blocks != kbuf->st_blocks)
	  return INLINE_SYSCALL_ERROR_RETURN_VALUE (EOVERFLOW);
#ifdef _HAVE_STAT_NSEC
	buf->st_atim.tv_sec = kbuf->st_atim.tv_sec;
	buf->st_atim.tv_nsec = kbuf->st_atim.tv_nsec;
	buf->st_mtim.tv_sec = kbuf->st_mtim.tv_sec;
	buf->st_mtim.tv_nsec = kbuf->st_mtim.tv_nsec;
	buf->st_ctim.tv_sec = kbuf->st_ctim.tv_sec;
	buf->st_ctim.tv_nsec = kbuf->st_ctim.tv_nsec;
#else
	buf->st_atime = kbuf->st_atime;
	buf->st_mtime = kbuf->st_mtime;
	buf->st_ctime = kbuf->st_ctime;
#endif

#ifdef _HAVE_STAT___UNUSED1
	buf->__glibc_reserved1 = 0;
#endif
#ifdef _HAVE_STAT___UNUSED2
	buf->__glibc_reserved2 = 0;
#endif
#ifdef _HAVE_STAT___UNUSED3
	buf->__glibc_reserved3 = 0;
#endif
#ifdef _HAVE_STAT___UNUSED4
	buf->__glibc_reserved4 = 0;
#endif
#ifdef _HAVE_STAT___UNUSED5
	buf->__glibc_reserved5 = 0;
#endif
      }
      break;

      /* If struct stat64 is different from struct stat then
	 _STAT_VER_KERNEL does not make sense.  */
    case _STAT_VER_KERNEL:
    default:
      return INLINE_SYSCALL_ERROR_RETURN_VALUE (EINVAL);
    }

  return 0;
}

#endif
Commit	Line	Data
1cab5444	1	/* Convert between the kernel's `struct stat' format, and libc's.
bfff8b1b	2	Copyright (C) 1991-2017 Free Software Foundation, Inc.
1cab5444 UD	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
41bdb6e2 AJ	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.
1cab5444 UD	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
41bdb6e2	13	Lesser General Public License for more details.
1cab5444	14
41bdb6e2	15	You should have received a copy of the GNU Lesser General Public
59ba27a6 PE	16	License along with the GNU C Library; if not, see
59ba27a6 PE	17	<http://www.gnu.org/licenses/>. */
1cab5444	18
9c7ff11a UD	19	#include <errno.h>
	20	#include <sys/stat.h>
	21	#include <kernel_stat.h>
f8de5057	22	#include <kernel-features.h>
9c7ff11a	23
c84d1f2e RM	24	#ifdef STAT_IS_KERNEL_STAT
	25
	26	/* Dummy. */
	27	struct kernel_stat;
	28
	29	#else
	30
1cab5444 UD	31	#include <string.h>
	32
	33
d2e1e973	34	#if XSTAT_IS_XSTAT64
9c7ff11a UD	35	int
9c7ff11a UD	36	__xstat_conv (int vers, struct kernel_stat kbuf, void ubuf)
1cab5444 UD	37	{
	38	switch (vers)
	39	{
	40	case _STAT_VER_KERNEL:
	41	/* Nothing to do. The struct is in the form the kernel expects.
	42	We should have short-circuted before we got here, but for
	43	completeness... */
cc3fa755	44	(struct kernel_stat ) ubuf = *kbuf;
1cab5444 UD	45	break;
	46
	47	case _STAT_VER_LINUX:
	48	{
	49	struct stat *buf = ubuf;
	50
	51	/* Convert to current kernel version of `struct stat'. */
	52	buf->st_dev = kbuf->st_dev;
56ddf355	53	#ifdef _HAVE_STAT___PAD1
1cab5444 UD	54	buf->__pad1 = 0;
	55	#endif
	56	buf->st_ino = kbuf->st_ino;
	57	buf->st_mode = kbuf->st_mode;
	58	buf->st_nlink = kbuf->st_nlink;
	59	buf->st_uid = kbuf->st_uid;
	60	buf->st_gid = kbuf->st_gid;
	61	buf->st_rdev = kbuf->st_rdev;
56ddf355	62	#ifdef _HAVE_STAT___PAD2
1cab5444 UD	63	buf->__pad2 = 0;
	64	#endif
	65	buf->st_size = kbuf->st_size;
	66	buf->st_blksize = kbuf->st_blksize;
	67	buf->st_blocks = kbuf->st_blocks;
a5dfb0e6	68	#ifdef _HAVE_STAT_NSEC
8cac677c UD	69	buf->st_atim.tv_sec = kbuf->st_atim.tv_sec;
	70	buf->st_atim.tv_nsec = kbuf->st_atim.tv_nsec;
	71	buf->st_mtim.tv_sec = kbuf->st_mtim.tv_sec;
	72	buf->st_mtim.tv_nsec = kbuf->st_mtim.tv_nsec;
	73	buf->st_ctim.tv_sec = kbuf->st_ctim.tv_sec;
	74	buf->st_ctim.tv_nsec = kbuf->st_ctim.tv_nsec;
a5dfb0e6 AJ	75	#else
	76	buf->st_atime = kbuf->st_atime;
	77	buf->st_mtime = kbuf->st_mtime;
	78	buf->st_ctime = kbuf->st_ctime;
	79	#endif
	80	#ifdef _HAVE_STAT___UNUSED1
d1d9eaf4	81	buf->__glibc_reserved1 = 0;
a5dfb0e6 AJ	82	#endif
a5dfb0e6 AJ	83	#ifdef _HAVE_STAT___UNUSED2
d1d9eaf4	84	buf->__glibc_reserved2 = 0;
a5dfb0e6 AJ	85	#endif
a5dfb0e6 AJ	86	#ifdef _HAVE_STAT___UNUSED3
d1d9eaf4	87	buf->__glibc_reserved3 = 0;
a5dfb0e6	88	#endif
56ddf355	89	#ifdef _HAVE_STAT___UNUSED4
d1d9eaf4	90	buf->__glibc_reserved4 = 0;
1cab5444	91	#endif
56ddf355	92	#ifdef _HAVE_STAT___UNUSED5
d1d9eaf4	93	buf->__glibc_reserved5 = 0;
1cab5444 UD	94	#endif
	95	}
	96	break;
	97
	98	default:
2caca60d	99	return INLINE_SYSCALL_ERROR_RETURN_VALUE (EINVAL);
1cab5444 UD	100	}
	101
	102	return 0;
	103	}
9c7ff11a	104	#endif
9756dfe1	105
9c7ff11a UD	106	int
9c7ff11a UD	107	__xstat64_conv (int vers, struct kernel_stat kbuf, void ubuf)
9756dfe1	108	{
d2e1e973	109	#if XSTAT_IS_XSTAT64
2f7f7bc6	110	return __xstat_conv (vers, kbuf, ubuf);
9756dfe1 UD	111	#else
	112	switch (vers)
	113	{
	114	case _STAT_VER_LINUX:
	115	{
	116	struct stat64 *buf = ubuf;
	117
	118	/* Convert to current kernel version of `struct stat64'. */
	119	buf->st_dev = kbuf->st_dev;
56ddf355	120	#ifdef _HAVE_STAT64___PAD1
9756dfe1 UD	121	buf->__pad1 = 0;
	122	#endif
	123	buf->st_ino = kbuf->st_ino;
56ddf355 UD	124	#ifdef _HAVE_STAT64___ST_INO
	125	buf->__st_ino = kbuf->st_ino;
	126	#endif
9756dfe1 UD	127	buf->st_mode = kbuf->st_mode;
	128	buf->st_nlink = kbuf->st_nlink;
	129	buf->st_uid = kbuf->st_uid;
	130	buf->st_gid = kbuf->st_gid;
	131	buf->st_rdev = kbuf->st_rdev;
56ddf355	132	#ifdef _HAVE_STAT64___PAD2
9756dfe1 UD	133	buf->__pad2 = 0;
	134	#endif
	135	buf->st_size = kbuf->st_size;
	136	buf->st_blksize = kbuf->st_blksize;
	137	buf->st_blocks = kbuf->st_blocks;
a5dfb0e6	138	#ifdef _HAVE_STAT64_NSEC
8cac677c UD	139	buf->st_atim.tv_sec = kbuf->st_atim.tv_sec;
	140	buf->st_atim.tv_nsec = kbuf->st_atim.tv_nsec;
	141	buf->st_mtim.tv_sec = kbuf->st_mtim.tv_sec;
	142	buf->st_mtim.tv_nsec = kbuf->st_mtim.tv_nsec;
	143	buf->st_ctim.tv_sec = kbuf->st_ctim.tv_sec;
	144	buf->st_ctim.tv_nsec = kbuf->st_ctim.tv_nsec;
a5dfb0e6 AJ	145	#else
	146	buf->st_atime = kbuf->st_atime;
	147	buf->st_mtime = kbuf->st_mtime;
	148	buf->st_ctime = kbuf->st_ctime;
	149	#endif
	150	#ifdef _HAVE_STAT64___UNUSED1
d1d9eaf4	151	buf->__glibc_reserved1 = 0;
a5dfb0e6 AJ	152	#endif
a5dfb0e6 AJ	153	#ifdef _HAVE_STAT64___UNUSED2
d1d9eaf4	154	buf->__glibc_reserved2 = 0;
a5dfb0e6 AJ	155	#endif
a5dfb0e6 AJ	156	#ifdef _HAVE_STAT64___UNUSED3
d1d9eaf4	157	buf->__glibc_reserved3 = 0;
a5dfb0e6	158	#endif
56ddf355	159	#ifdef _HAVE_STAT64___UNUSED4
d1d9eaf4	160	buf->__glibc_reserved4 = 0;
9756dfe1	161	#endif
56ddf355	162	#ifdef _HAVE_STAT64___UNUSED5
d1d9eaf4	163	buf->__glibc_reserved5 = 0;
9756dfe1 UD	164	#endif
	165	}
	166	break;
	167
	168	/* If struct stat64 is different from struct stat then
	169	_STAT_VER_KERNEL does not make sense. */
	170	case _STAT_VER_KERNEL:
	171	default:
2caca60d	172	return INLINE_SYSCALL_ERROR_RETURN_VALUE (EINVAL);
9756dfe1 UD	173	}
	174
	175	return 0;
	176	#endif
	177	}
a8481a8c	178
9c7ff11a UD	179	int
9c7ff11a UD	180	__xstat32_conv (int vers, struct stat64 kbuf, struct stat buf)
a8481a8c UD	181	{
	182	switch (vers)
	183	{
	184	case _STAT_VER_LINUX:
	185	{
56ddf355 UD	186	/* Convert current kernel version of `struct stat64' to
56ddf355 UD	187	`struct stat'. */
a8481a8c	188	buf->st_dev = kbuf->st_dev;
56ddf355	189	#ifdef _HAVE_STAT___PAD1
a8481a8c UD	190	buf->__pad1 = 0;
a8481a8c UD	191	#endif
56ddf355	192	#ifdef _HAVE_STAT64___ST_INO
327792ce	193	# if !__ASSUME_ST_INO_64_BIT
56ddf355 UD	194	if (kbuf->st_ino == 0)
	195	buf->st_ino = kbuf->__st_ino;
	196	else
	197	# endif
	198	{
	199	buf->st_ino = kbuf->st_ino;
0f6b172f	200	if (sizeof (buf->st_ino) != sizeof (kbuf->st_ino)
56ddf355	201	&& buf->st_ino != kbuf->st_ino)
2caca60d	202	return INLINE_SYSCALL_ERROR_RETURN_VALUE (EOVERFLOW);
56ddf355 UD	203	}
56ddf355 UD	204	#else
0f6b172f UD	205	buf->st_ino = kbuf->st_ino;
0f6b172f UD	206	if (sizeof (buf->st_ino) != sizeof (kbuf->st_ino)
56ddf355	207	&& buf->st_ino != kbuf->st_ino)
2caca60d	208	return INLINE_SYSCALL_ERROR_RETURN_VALUE (EOVERFLOW);
56ddf355	209	#endif
a8481a8c UD	210	buf->st_mode = kbuf->st_mode;
	211	buf->st_nlink = kbuf->st_nlink;
	212	buf->st_uid = kbuf->st_uid;
	213	buf->st_gid = kbuf->st_gid;
	214	buf->st_rdev = kbuf->st_rdev;
56ddf355	215	#ifdef _HAVE_STAT___PAD2
a8481a8c UD	216	buf->__pad2 = 0;
	217	#endif
	218	buf->st_size = kbuf->st_size;
	219	/* Check for overflow. */
56ddf355 UD	220	if (sizeof (buf->st_size) != sizeof (kbuf->st_size)
56ddf355 UD	221	&& buf->st_size != kbuf->st_size)
2caca60d	222	return INLINE_SYSCALL_ERROR_RETURN_VALUE (EOVERFLOW);
a8481a8c UD	223	buf->st_blksize = kbuf->st_blksize;
	224	buf->st_blocks = kbuf->st_blocks;
	225	/* Check for overflow. */
56ddf355 UD	226	if (sizeof (buf->st_blocks) != sizeof (kbuf->st_blocks)
56ddf355 UD	227	&& buf->st_blocks != kbuf->st_blocks)
2caca60d	228	return INLINE_SYSCALL_ERROR_RETURN_VALUE (EOVERFLOW);
a5dfb0e6	229	#ifdef _HAVE_STAT_NSEC
8cac677c UD	230	buf->st_atim.tv_sec = kbuf->st_atim.tv_sec;
	231	buf->st_atim.tv_nsec = kbuf->st_atim.tv_nsec;
	232	buf->st_mtim.tv_sec = kbuf->st_mtim.tv_sec;
	233	buf->st_mtim.tv_nsec = kbuf->st_mtim.tv_nsec;
	234	buf->st_ctim.tv_sec = kbuf->st_ctim.tv_sec;
	235	buf->st_ctim.tv_nsec = kbuf->st_ctim.tv_nsec;
a5dfb0e6 AJ	236	#else
	237	buf->st_atime = kbuf->st_atime;
	238	buf->st_mtime = kbuf->st_mtime;
	239	buf->st_ctime = kbuf->st_ctime;
	240	#endif
	241
	242	#ifdef _HAVE_STAT___UNUSED1
d1d9eaf4	243	buf->__glibc_reserved1 = 0;
a5dfb0e6 AJ	244	#endif
a5dfb0e6 AJ	245	#ifdef _HAVE_STAT___UNUSED2
d1d9eaf4	246	buf->__glibc_reserved2 = 0;
a5dfb0e6 AJ	247	#endif
a5dfb0e6 AJ	248	#ifdef _HAVE_STAT___UNUSED3
d1d9eaf4	249	buf->__glibc_reserved3 = 0;
a5dfb0e6	250	#endif
56ddf355	251	#ifdef _HAVE_STAT___UNUSED4
d1d9eaf4	252	buf->__glibc_reserved4 = 0;
a8481a8c	253	#endif
56ddf355	254	#ifdef _HAVE_STAT___UNUSED5
d1d9eaf4	255	buf->__glibc_reserved5 = 0;
a8481a8c UD	256	#endif
	257	}
	258	break;
	259
	260	/* If struct stat64 is different from struct stat then
	261	_STAT_VER_KERNEL does not make sense. */
	262	case _STAT_VER_KERNEL:
	263	default:
2caca60d	264	return INLINE_SYSCALL_ERROR_RETURN_VALUE (EINVAL);
a8481a8c UD	265	}
	266
	267	return 0;
	268	}
c84d1f2e RM	269
c84d1f2e RM	270	#endif