150 lines
4.2 KiB
C
150 lines
4.2 KiB
C
/*
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* Copyright (C) 2010 Piotr Jaroszyński <p.jaroszynski@gmail.com>
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of the
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* License, or any later version.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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FILE_LICENCE ( GPL2_OR_LATER );
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/** @file
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*
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* Implementation of most of the linux API.
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*/
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#include <linux_api.h>
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#include <stdarg.h>
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#include <asm/unistd.h>
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#include <string.h>
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int linux_open ( const char *pathname, int flags ) {
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return linux_syscall ( __NR_open, pathname, flags );
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}
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int linux_close ( int fd ) {
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return linux_syscall ( __NR_close, fd );
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}
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off_t linux_lseek ( int fd, off_t offset, int whence ) {
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return linux_syscall ( __NR_lseek, fd, offset, whence );
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}
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__kernel_ssize_t linux_read ( int fd, void *buf, __kernel_size_t count ) {
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return linux_syscall ( __NR_read, fd, buf, count );
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}
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__kernel_ssize_t linux_write ( int fd, const void *buf,
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__kernel_size_t count ) {
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return linux_syscall ( __NR_write, fd, buf, count );
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}
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int linux_fcntl ( int fd, int cmd, ... ) {
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long arg;
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va_list list;
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va_start ( list, cmd );
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arg = va_arg ( list, long );
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va_end ( list );
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return linux_syscall ( __NR_fcntl, fd, cmd, arg );
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}
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int linux_ioctl ( int fd, int request, ... ) {
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void *arg;
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va_list list;
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va_start ( list, request );
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arg = va_arg ( list, void * );
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va_end ( list );
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return linux_syscall ( __NR_ioctl, fd, request, arg );
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}
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int linux_poll ( struct pollfd *fds, nfds_t nfds, int timeout ) {
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return linux_syscall ( __NR_poll, fds, nfds, timeout );
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}
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int linux_nanosleep ( const struct timespec *req, struct timespec *rem ) {
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return linux_syscall ( __NR_nanosleep, req, rem );
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}
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int linux_usleep ( useconds_t usec ) {
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struct timespec ts = {
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.tv_sec = ( ( long ) ( usec / 1000000 ) ),
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.tv_nsec = ( ( long ) ( usec % 1000000 ) * 1000UL ),
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};
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return linux_nanosleep ( &ts, NULL );
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}
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int linux_gettimeofday ( struct timeval *tv, struct timezone *tz ) {
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return linux_syscall ( __NR_gettimeofday, tv, tz );
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}
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void * linux_mmap ( void *addr, __kernel_size_t length, int prot, int flags,
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int fd, __kernel_off_t offset ) {
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return ( void * ) linux_syscall ( __SYSCALL_mmap, addr, length, prot,
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flags, fd, offset );
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}
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void * linux_mremap ( void *old_address, __kernel_size_t old_size,
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__kernel_size_t new_size, int flags ) {
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return ( void * ) linux_syscall ( __NR_mremap, old_address, old_size,
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new_size, flags );
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}
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int linux_munmap ( void *addr, __kernel_size_t length ) {
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return linux_syscall ( __NR_munmap, addr, length );
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}
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int linux_socket ( int domain, int type_, int protocol ) {
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#ifdef __NR_socket
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return linux_syscall ( __NR_socket, domain, type_, protocol );
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#else
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#ifndef SOCKOP_socket
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# define SOCKOP_socket 1
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#endif
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unsigned long sc_args[] = { domain, type_, protocol };
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return linux_syscall ( __NR_socketcall, SOCKOP_socket, sc_args );
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#endif
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}
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int linux_bind ( int fd, const struct sockaddr *addr, socklen_t addrlen ) {
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#ifdef __NR_bind
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return linux_syscall ( __NR_bind, fd, addr, addrlen );
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#else
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#ifndef SOCKOP_bind
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# define SOCKOP_bind 2
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#endif
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unsigned long sc_args[] = { fd, (unsigned long)addr, addrlen };
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return linux_syscall ( __NR_socketcall, SOCKOP_bind, sc_args );
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#endif
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}
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ssize_t linux_sendto ( int fd, const void *buf, size_t len, int flags,
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const struct sockaddr *daddr, socklen_t addrlen ) {
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#ifdef __NR_sendto
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return linux_syscall ( __NR_sendto, fd, buf, len, flags,
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daddr, addrlen );
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#else
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#ifndef SOCKOP_sendto
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# define SOCKOP_sendto 11
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#endif
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unsigned long sc_args[] = { fd, (unsigned long)buf, len,
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flags, (unsigned long)daddr, addrlen };
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return linux_syscall ( __NR_socketcall, SOCKOP_sendto, sc_args );
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#endif
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}
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