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