/*------------------------------------------------------------------*/
/* testlowlevelout.c                                                */
/* Author: Bob Dondero                                              */
/* The creat, write, and close system calls.                        */
/*------------------------------------------------------------------*/

#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <fcntl.h>

int main(int argc, char *argv[])
{
   int iFd;
   int iRet;
   ssize_t iBytesWritten;
   ssize_t iTotalBytesWritten;
   char pcBuffer[] = "somedata\n";

   /* Write "somedata\n" to a file named tempfile. */

   iFd = creat("tempfile", 0600);
   if (iFd == -1) {perror(argv[0]); return EXIT_FAILURE; }

   iTotalBytesWritten = 0;
   while (iTotalBytesWritten < 9)
   {
      iBytesWritten =
         write(iFd, pcBuffer + iTotalBytesWritten,
               (size_t)(9 - iTotalBytesWritten));
      if (iBytesWritten == -1)
         {perror(argv[0]); return EXIT_FAILURE; }
      iTotalBytesWritten += iBytesWritten;
   }

   iRet = close(iFd);
   if (iRet == -1) {perror(argv[0]); return EXIT_FAILURE; }

   return 0;
}

/*------------------------------------------------------------------*/

/* Sample execution:

$ gcc -Wall -ansi -pedantic testlowlevelout.c -o testlowlevelout

$ testlowlevelout

$ cat tempfile
somedata

*/