newlib/libc/sys/linux/io.c

   1 /* libc/sys/linux/io.c - Basic input/output system calls */
   2
   3 /* Written 2000 by Werner Almesberger */
   4
   5
   6 #define __KERNEL_PROTOTYPES
   7
   8 #include <stdarg.h>
   9 #include <unistd.h>
  10 #include <fcntl.h>
  11 #include <sys/types.h>
  12 #include <sys/uio.h>
  13 #include <sys/stat.h>
  14 #include <sys/ioctl.h>
  15 #include <poll.h>
  16 #include <machine/syscall.h>
  17
  18
  19 #define __NR___ioctl __NR_ioctl
  20 #define __NR___flock __NR_flock
  21 #define __NR___mknod __NR_mknod
  22
  23 _syscall3(int,read,int,fd,void *,buf,size_t,count)
  24 _syscall3(ssize_t,readv,int,fd,const struct iovec *,vec,int,count)
  25 _syscall3(int,write,int,fd,const void *,buf,size_t,count)
  26 _syscall3(ssize_t,writev,int,fd,const struct iovec *,buf,int,count)
  27 _syscall3(int,open,const char *,file,int,flag,mode_t,mode)
  28 _syscall1(int,close,int,fd)
  29 _syscall3(off_t,lseek,int,fd,off_t,offset,int,count)
  30 _syscall0(int,sync)
  31 _syscall1(int,dup,int,fd)
  32 _syscall2(int,dup2,int,oldfd,int,newfd)
  33 _syscall3(int,fcntl,int,fd,int,cmd,long,arg)
  34 _syscall1(int,fdatasync,int,fd)
  35 _syscall1(int,fsync,int,fd)
  36 _syscall3(int,poll,struct pollfd *,fds,nfds_t,nfds,int,timeout)
  37
  38 static _syscall2(long,__flock,unsigned int,fd,unsigned int,cmd)
  39 static _syscall3(int,__ioctl,int,fd,int,request,void *,arg)
  40 static _syscall3(int,__mknod,const char *,path,mode_t,mode,dev_t *,dev)
  41
  42 int ioctl(int fd,int request,...)
  43 {
  44     va_list ap;
  45     int res;
  46
  47     va_start(ap,request);
  48     res = __ioctl(fd,request,va_arg(ap,void *));
  49     va_end(ap);
  50     return res;
  51 }
  52
  53 int flock(int fd,int operation)
  54 {
  55     return __flock(fd,operation);
  56 }
  57
  58 int mkfifo(const char *path, mode_t mode)
  59 {
  60    dev_t dev = 0;
  61    return __mknod(path, mode | S_IFIFO, &dev);
  62 }
  63
  64 weak_alias(__libc_close,__close);
  65 weak_alias(__libc_fcntl,__fcntl);
  66 weak_alias(__libc_lseek,__lseek);
  67 weak_alias(__libc_open,__open);
  68 weak_alias(__libc_read,__read);
  69 weak_alias(__libc_write,__write);
  70 weak_alias(__libc_poll,__poll);
  71