/* vi: set sw=4 ts=4: * * Copyright (C) 2002 by Erik Andersen <andersen@uclibc.org> * Based in part on the files * ./sysdeps/unix/sysv/linux/pwrite.c, * ./sysdeps/unix/sysv/linux/pread.c, * sysdeps/posix/pread.c * sysdeps/posix/pwrite.c * from GNU libc 2.2.5, but reworked considerably... * * This program 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. * * This program 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 this program; if not, write to the Free Software Foundation, * Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */ #define _LARGEFILE64_SOURCE #include <features.h> #undef __OPTIMIZE__ /* We absolutely do _NOT_ want interfaces silently * * * renamed under us or very bad things will happen... */ #ifdef __USE_FILE_OFFSET64 # undef __USE_FILE_OFFSET64 #endif #include <errno.h> #include <sys/types.h> #include <sys/syscall.h> #include <unistd.h> #include <stdint.h> extern __typeof(pread) __libc_pread; extern __typeof(pwrite) __libc_pwrite; #ifdef __UCLIBC_HAS_LFS__ extern __typeof(pread64) __libc_pread64; extern __typeof(pwrite64) __libc_pwrite64; #endif #ifdef __NR_pread64 /* Newer kernels renamed but it's the same. */ # ifdef __NR_pread # error "__NR_pread and __NR_pread64 both defined???" # endif # define __NR_pread __NR_pread64 #endif #define __NR___syscall_pread __NR_pread static inline _syscall5(ssize_t, __syscall_pread, int, fd, void *, buf, size_t, count, off_t, offset_hi, off_t, offset_lo); ssize_t __libc_pread(int fd, void *buf, size_t count, off_t offset) { return(__syscall_pread(fd,buf,count,offset,offset >> 31)); } weak_alias (__libc_pread, pread) #if defined __UCLIBC_HAS_LFS__ ssize_t __libc_pread64(int fd, void *buf, size_t count, off64_t offset) { uint32_t low = offset & 0xffffffff; uint32_t high = offset >> 32; return(__syscall_pread(fd, buf, count, low, high)); } weak_alias (__libc_pread64, pread64) #endif /* __UCLIBC_HAS_LFS__ */ #ifdef __NR_pwrite64 /* Newer kernels renamed but it's the same. */ # ifdef __NR_pwrite # error "__NR_pwrite and __NR_pwrite64 both defined???" # endif # define __NR_pwrite __NR_pwrite64 #endif #define __NR___syscall_pwrite __NR_pwrite static inline _syscall5(ssize_t, __syscall_pwrite, int, fd, const void *, buf, size_t, count, off_t, offset_hi, off_t, offset_lo); ssize_t __libc_pwrite(int fd, const void *buf, size_t count, off_t offset) { return(__syscall_pwrite(fd,buf,count,offset,offset >> 31)); } weak_alias (__libc_pwrite, pwrite) #if defined __UCLIBC_HAS_LFS__ ssize_t __libc_pwrite64(int fd, const void *buf, size_t count, off64_t offset) { uint32_t low = offset & 0xffffffff; uint32_t high = offset >> 32; return(__syscall_pwrite(fd, buf, count, low, high)); } weak_alias (__libc_pwrite64, pwrite64) #endif /* __UCLIBC_HAS_LFS__ */