44 lines
1.1 KiB
C
44 lines
1.1 KiB
C
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#include <stdio.h>
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#include <stdlib.h>
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#include <io.h>
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#include <fcntl.h>
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void main()
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{
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long os_handle;
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int fh1, fh2, rc;
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fh1 = open( "file",
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O_WRONLY | O_CREAT | O_TRUNC | O_BINARY,
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S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP );
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if( fh1 == -1 ) {
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printf( "Could not open output file\n" );
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exit( EXIT_FAILURE );
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}
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printf( "First POSIX handle %d\n", fh1 );
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#if defined(USE_DUP2)
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fh2 = 6;
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if( dup2( fh1, fh2 ) == -1 ) fh2 = -1;
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#else
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os_handle = _get_osfhandle( fh1 );
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printf( "OS Handle %ld\n", os_handle );
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fh2 = _open_osfhandle( os_handle, O_WRONLY |
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O_BINARY );
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#endif
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if( fh2 == -1 ) {
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printf( "Could not open with second handle\n" );
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exit( EXIT_FAILURE );
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}
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printf( "Second POSIX handle %d\n", fh2 );
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rc = write( fh2, "trash\x0d\x0a", 7 );
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printf( "Write file using second handle %d\n", rc );
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rc = close( fh2 );
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printf( "Closing second handle %d\n", rc );
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rc = close( fh1 );
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printf( "Closing first handle %d\n", rc );
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}
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