Is issueing multiple IBWAITs the best way to incorporate max time?

My application is given a max-time parameter that tells how long it should wait to recieve data from my instrument after requesting data. The max-time can be anywhere from 2 seconds to 480 seconds.
Currently I send an IBWAIT (TIMO|ERR|SRQI). If SRQI then I send IBRSP to the instrument. I don't feel comfortable changing the GPIB time-out time. Is it possible to put the IBWAIT command in a 'while' loop and compare time from when issued and when finished, and issue another IBWAIT if TIMO was returned on the first IBWAIT? Or, is there a better way to do this?
Thank you for any help.

Hi Scott,
I was in contact weeks ago about a pb with gpibintctrl under linux RH 8.0 with beta 2.3.
I have downloaded 2.5 as U suggested it, and install it in place of 2.3
But the pb is the same, the buffer returned by ibrd under gpibintctrl cannot be greater than 16 bytes !!!
What is the pb?
Example :
: ibdev 0 9 0 13 0 0x0a
ud0: ibwrt "*IDN?\r\n"
[0100] ( cmpl )
count: 7
ud0: ibrd 16
[0100] ( cmpl )
count: 16
48 45 57 4c 45 54 54 2d H E W L E T T -
50 41 43 4b 41 52 44 2c P A C K A R D ,
ud0: ibrd 17
[2100] ( end cmpl )
count: 15
00 00 00 00 00 00 00 00 . . . . . . . .
00 00 00 00 00 00 00 . . . . . . .

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