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   write

   Usage
   #include <io.h>
   int write(int fd,void *buffer,size_t length);

   Description
   Write  length  bytes  from buffer to the file specified  by  the  file
   descriptor  fd. This is a binary-only operation and is  not  buffered.
   Implemented as a direct DOS call.

   Example
   #include <io.h>
   #include <string.h>
   #include <stdio.h>
   #include <dos.h>
   main()
   {
   unsigned int fd;
   char *buffer = "Write this data to file";
   unsigned int count;
   int nwritten;
        count = strlen(buffer);
        fd = open("file.dat",O_WRONLY);
        if(fd == -1)
        {
             fputs("Unable to open file",stdout);
             return;
        }
        nwritten = write(fd,buffer,count);
        printf("\nWRITE:\n%u bytes written to file\n",nwritten);
        close(fd);
   }

   Return Value
   write  returns the number of actual bytes written or a -1 if an  error
   occurred and errno is set.