Message 67758 - Python tracker

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Author	schmir
Recipients	aioryi, draghuram, schmir
Date	2008-06-06.09:43:10
SpamBayes Score	0.13829845
Marked as misclassified	No
Message-id	<1212745398.82.0.654764504969.issue3002@psf.upfronthosting.co.za>
In-reply-to

Content
The open('fifo', 'rb') already blocks. One has to use os.fdopen with O_NONBLOCK to prevent blocking. fd=os.open('fifo', os.O_RDONLY \| os.O_NONBLOCK) and then use stat.S_ISFIFO(os.fstat(fd).st_mode) to check if this is a fifo. Checking with os.stat before opening with open will result in a race condition.

The open('fifo', 'rb') already blocks. One has to use os.fdopen with
O_NONBLOCK to prevent blocking.

fd=os.open('fifo', os.O_RDONLY | os.O_NONBLOCK)

and then use

stat.S_ISFIFO(os.fstat(fd).st_mode)

to check if this is a fifo.
Checking with os.stat before opening with open will result in a race
condition.

History
Date	User	Action	Args
2008-06-06 09:43:19	schmir	set	spambayes_score: 0.138298 -> 0.13829845 recipients: + schmir, draghuram, aioryi
2008-06-06 09:43:18	schmir	set	spambayes_score: 0.138298 -> 0.138298 messageid: <1212745398.82.0.654764504969.issue3002@psf.upfronthosting.co.za>
2008-06-06 09:43:17	schmir	link	issue3002 messages
2008-06-06 09:43:15	schmir	create