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- /*
- * Copyright (c) 1992 Commodore-Amiga, Inc.
- *
- * This example is provided in electronic form by Commodore-Amiga, Inc. for
- * use with the "Amiga ROM Kernel Reference Manual: Devices", 3rd Edition,
- * published by Addison-Wesley (ISBN 0-201-56775-X).
- *
- * The "Amiga ROM Kernel Reference Manual: Devices" contains additional
- * information on the correct usage of the techniques and operating system
- * functions presented in these examples. The source and executable code
- * of these examples may only be distributed in free electronic form, via
- * bulletin board or as part of a fully non-commercial and freely
- * redistributable diskette. Both the source and executable code (including
- * comments) must be included, without modification, in any copy. This
- * example may not be published in printed form or distributed with any
- * commercial product. However, the programming techniques and support
- * routines set forth in these examples may be used in the development
- * of original executable software products for Commodore Amiga computers.
- *
- * All other rights reserved.
- *
- * This example is provided "as-is" and is subject to change; no
- * warranties are made. All use is at your own risk. No liability or
- * responsibility is assumed.
- *
- *****************************************************************************
- *
- *
- * Query_Serial.c
- *
- * We will try to open the serial device and if unsuccessful,
- * will return the name of the owner.
- *
- * Compile with SAS C 5.10 lc -b1 -cfistq -v -y -L
- *
- * Run from CLI only
- */
-
- #include <exec/types.h>
- #include <exec/memory.h>
- #include <dos/dos.h>
- #include <resources/misc.h>
- #include <devices/serial.h>
-
- #include <clib/exec_protos.h>
- #include <clib/alib_protos.h>
- #include <clib/dos_protos.h>
-
- #include <stdio.h>
- #include <stdlib.h>
-
- #ifdef LATTICE
- #include <clib/misc_protos.h>
- #include <stdio.h>
- int CXBRK(void) { return(0); } /* Disable SAS CTRL-C handling */
- void main(void);
- #endif
-
- #define UNIT_NUMBER 0
-
- struct Library *MiscBase;
-
- /* our functions */
- void cleanexit(UBYTE *,LONG);
- void cleanup(void);
-
- struct MsgPort *SerialMP; /* Message port pointer */
- struct IOExtSer *SerialIO; /* IORequest pointer */
-
- void main()
- {
- UWORD status; /* return value of SDCMD_QUERY */
- UBYTE *user; /* name of serial port owner if not us */
-
- if (SerialMP=CreatePort(NULL,NULL) )
- {
- if (SerialIO=(struct IOExtSer *)
- CreateExtIO(SerialMP,sizeof(struct IOExtSer)) )
- {
- if (OpenDevice(SERIALNAME,UNIT_NUMBER,(struct IORequest *)SerialIO,0))
- {
- printf("\n%s did not open",SERIALNAME);
-
- MiscBase= (struct Library *)OpenResource(MISCNAME);
-
- /* Find out who has the serial device */
- if ((user = AllocMiscResource(MR_SERIALPORT,"Us")) == NULL)
- {
- printf("\n");
- FreeMiscResource(MR_SERIALPORT);
- }
- else
- printf(" because %s owns it \n\n",user);
-
- /* Clean up */
- cleanup();
- }
- else
- {
- SerialIO->IOSer.io_Command = SDCMD_QUERY;
- SendIO((struct IORequest *)SerialIO); /* execute query */
-
- status = SerialIO->io_Status; /* store returned status */
-
- printf("\tThe serial port status is %x\n",status);
-
- AbortIO((struct IORequest *)SerialIO);
- WaitIO((struct IORequest *)SerialIO);
-
- CloseDevice((struct IORequest *)SerialIO);
- cleanup();
- }
- }
- else
- cleanexit("Can't create IORequest\n",RETURN_FAIL);
- }
- else
- cleanexit("Can't create message port\n",RETURN_FAIL);
- }
-
-
- void cleanexit(UBYTE *s,LONG n)
- {
- if (*s)
- printf(s);
- cleanup();
- exit(n);
- }
-
- void cleanup()
- {
- if (SerialIO)
- DeleteExtIO(SerialIO);
- if (SerialMP)
- DeletePort(SerialMP);
- }
-