58 lines
968 B
C
58 lines
968 B
C
/*
|
|
* An example showing how you can obtain the UNIX-ish file number from a
|
|
* FILE* and in turn how you can get the Win32 HANDLE of the file from
|
|
* the file number.
|
|
*
|
|
* This code is in the PUBLIC DOMAIN and has NO WARRANTY.
|
|
*
|
|
* Colin Peters <colin@fu.is.saga-u.ac.jp>
|
|
*/
|
|
|
|
#include <stdio.h>
|
|
#include <io.h>
|
|
#include <windows.h>
|
|
|
|
int
|
|
main (int argc, char* argv[])
|
|
{
|
|
char* szFileName;
|
|
FILE* fileIn;
|
|
int fnIn;
|
|
HANDLE hFileIn;
|
|
char caBuf[81];
|
|
int nRead;
|
|
|
|
if (argc >= 2)
|
|
{
|
|
szFileName = argv[1];
|
|
}
|
|
else
|
|
{
|
|
szFileName = "junk.txt";
|
|
}
|
|
|
|
fileIn = fopen (szFileName, "r");
|
|
|
|
if (!fileIn)
|
|
{
|
|
printf ("Could not open %s for reading\n", szFileName);
|
|
exit(1);
|
|
}
|
|
|
|
fnIn = fileno (fileIn);
|
|
hFileIn = (HANDLE) _get_osfhandle (fnIn);
|
|
|
|
printf ("OS file handle %d\n", (int) hFileIn);
|
|
|
|
ReadFile (hFileIn, caBuf, 80, &nRead, NULL);
|
|
|
|
printf ("Read %d bytes using ReadFile.\n", nRead);
|
|
|
|
caBuf[nRead] = '\0';
|
|
|
|
printf ("\"%s\"\n", caBuf);
|
|
|
|
fclose (fileIn);
|
|
}
|
|
|