| /* Convert between the kernel's `struct stat' format, and libc's. |
| Copyright (C) 1991-2018 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 |