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08-07-2007
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help to find find filename usingFile pointer in c
Hi ..
I am having a file pointer .. it have declared some where tough to find out that ..Can we find out the filename associated with file pointer ... i mean is there any function FILEPOINTER.filename() is there in c ??... Thanks, Arun 
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08-07-2007
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Not AFAIK. You cannot find the filename from a file pointer or a file descriptor. This has been discussed here before. You can search the site for more info.
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08-07-2007
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In the case of "prog_a | prog_b", prog_b won't have any name associated with FD 0. There are lots of problems like that. lsof is a program that can display pretty good info for most FD's of most processes, but it must run suid'ed to root. Get lsof and run it to see if that sort of info could help you. If so, use popen() to run lsof from your process and parse the lsof output to get what you need. Something like this is the only way.
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