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uw_detach.c
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C/C++ Source or Header
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1991-01-25
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677b
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32 lines
/*
* uw library - uw_detach
*
* Copyright 1986 by John D. Bruner. All rights reserved. Permission to
* copy this program is given provided that the copy is not sold and that
* this copyright notice is included.
*/
#include "uwlib.h"
uw_detach(uwin)
UWIN uwin;
{
/*
* Detach the control file descriptor for a window, while still
* retaining access to the data file descriptor.
*/
if (uwin != (UWIN)0) {
if (uwin->uwi_ctlfd >= 0) {
uw_optdone(uwin->uwi_ctlfd);
(void)close(uwin->uwi_ctlfd);
uwin->uwi_ctlfd = -1;
return(0);
} else {
uwerrno = uwin->uwi_uwerr = UWE_NOCTL;
return(-1);
}
} else {
uwerrno = UWE_INVAL;
return(-1);
}
}