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Cannot Close File Descriptor

A stackoverflow thread about TCP TIME_WAIT and file descriptors. Thanks for your help! –JosephConrad Nov 11 '13 at 13:11 add a comment| Your Answer draft saved draft discarded Sign up or log in Sign up using Google Sign up Newton's second law for individual forces Why is this C++ code faster than my hand-written assembly for testing the Collatz conjecture? If the thread gets canceled these resources stay allocated until the program ends. check my blog

Re: close() gives bad file descriptor error by Zaxo (Archbishop) on Jan 31, 2002 at 20:31EST Check permissions on the parent directory. The problem On most POSIX operating systems, including Linux and Os X, each process is allocated a fixed table of file handles, or file descriptors. WARNING: can't import layer ipsec: No module named Crypto.Util.number INFO: Can't import python Crypto lib. asked 2 years ago viewed 424 times active 2 years ago Related 2How can I discover who's checked out a file in ClearCase?12Undo remove file in ClearCase1What is a bleed-thru file https://stackoverflow.com/questions/23126620/clearcase-check-in-operation-fails-with-cant-close-file-descriptor-0-bad-file

When a file handle is closed, the reference count on its open file description is decremented. Bugs ahead ! INFO: Can't import python Crypto lib. The same file descriptor is usually held by the shell from which the program was run, so the file descriptor needs to be kept.

This part is causing me no end of headaches: sub write_list { my $outfile = "/home/foo/bar"; open (OUT, ">$outfile") or &print_error ("Can't open $outfile: + $!"); foreach $i (@changes) { print more hot questions question feed lang-c about us tour help blog chat data legal privacy policy work here advertising info mobile contact us feedback Technology Life / Arts Culture / Recreation If you still can't figure it out, you could log every call that creates file descriptors ( e.g. Fork and pipes2Read / Write through a pipe in C0How should parent close pipe file descriptor when child process exits-2Child Fork Process using fork() and pipe()0fork and pipe confusion from quiz0C:

is the packet being sent ? Many file systems will clear the block pointers in the inode when it is released. If the call is successful, then the handle is currently open: void showFDInfo() { s32 numHandles = getdtablesize(); for ( s32 i = 0; i < numHandles; i++ ) { s32 Is there a wage gap between smokers and non-smokers?

I was under the impression that you should close each end of a pipe in any process which doesn't use that end. I.e., file length and file offsets can exceed 31 bits. How can I avoid being chastised for a project I inherited which was already buggy, but I was told to add features instead of fixing it? The open function is the underlying primitive for the fopen and freopen functions, that create streams. Function: int open64 (const char *filename, int flags[, mode_t mode]) Preliminary: | MT-Safe |

Dumping its name and flags will help you identify its likely source: void showFDInfo( s32 fd ) { char buf[256]; s32 fd_flags = fcntl( fd, F_GETFD ); if ( fd_flags == http://www.perlmonks.org/bare/?node_id=142521 Pipes: If you spawn sub-processes that communicate through pipes, often the pipe ends have to be duplicated ( with dup or dup2() ) and the right parts of the pipe need If the only problem was that the program exited non-zero, $! I would expect a separate counter is kept for open file handles.

Or if the subprocess will be the one that will handle an open network socket. click site Closing a file has the following consequences: The file descriptor is deallocated. The following errno error conditions are defined for this function: EBADF The filedes argument is not a valid file descriptor. Storage of a material that passes through non-living matter My manager said I spend too much time on Stack Exchange.

Updates to disk may be buffered and completed at a later time. Does a key signature go before or after a bar line? Dealing with Duplicate File Descriptors from Sub-Processes When you spawn subprocesses they inherit all the open file descriptors of the parent process unless those descriptors have been specifically flagged as FD_CLOEXEC news The open file description contains things like the open mode and file pointer.

Advisor professor asks for my dissertation research source-code Why allow shared_ptr? How to replace inner text with yanked text This is my pillow Wait... This is not necessary since this function does not determine nor depend on the mode of the file.

Windows HANDLES: On windows there are a nearly infinite number of objects that hold handles.

and ${^CHILD_ERROR_NATIVE} . send(IP(dst="www.google.com")/ICMP()) .WARNING: more del: don't know how to close the file descriptor. before the process writing to it at the other end has closed it) will result in a SIGPIPE being delivered to the writer. from sort"; open(INPUT, 'foo') # get sort's results or die "Can't open 'foo' for input: $!";FILEHANDLE may be an expression whose value can be used as an indirect filehandle, usually the

What if such a file is being used by an other process? gpotter2 commented Sep 17, 2016 • edited Try with the last dev version, because this error is not happening anymore ! 😄 👍 1 csdrane commented Sep 29, 2016 Latest send(IP(dst="www.google.com")/ICMP()) WARNING: del: don't know how to close the file descriptor. More about the author Recently read close Perl functions A-Z | Perl functions by category | The 'perlfunc' manpage close FILEHANDLE close Closes the file or pipe associated with the file handle, flushes the IO

share|improve this answer answered Nov 28 '11 at 3:36 BillThor 6,2201021 1 Two questions: (1) are the file descriptors really ref-counted? cleartool chtype -force text_file FinansBanka.rftdef That is a workaround solution, which doesn't address while the type manager fails in the first place. This happens transparently for the user since all of the lowlevel file handling functions are equally replaced. If the file handle came from a piped open, close will additionally return false if one of the other system calls involved fails, or if the program exits with

Returns true if those operations succeed and if no error was reported by any PerlIO layer. In addition, there are no other errors on any of the other calls to close(). Words for extrovert / introvert? This is typically about 1024 handles.

The flags can also help you narrow down likely culprits. Herbarium An experiment in organizing the data for the Skyrim Alchemy skill Massachusetts Election 2010 A news site about the 2010 election Cr0.me A URL shortener Copyright © 2016 Programmer's Notebook up vote 13 down vote favorite 5 I am trying to get the whole picture with file descriptors. Each one must be closed properly Files: You can also leak handles the old fashioned way by failing to close() handles to regular files.

Related 4What is the referent of a file descriptor?5How can different file descriptors point to the same file in open file table?7file descriptors and /dev/fd6File descriptor linked to socket or pipe Dealing with Multiple Database Connections Don't open a new database connection for every database request. When you call close, you always close the file handle. Wrong Answers, Myths and Bad Ideas Raise the file handle limit One common answer to this problem is to just raise the limit of open file handles and then restart the

felixzhang1 commented Apr 8, 2016 I use scapy on windows and I met the same issue, the packet has been send, and I install scapy with pip, I download pcap via See "About the Rational ClearCase Type Manager": For operations that create/delete/modify source containers (cleartool/GUI/multitool-import mkelem,mkbranch,checkin,checkout-w/auto-mkbranch,rmver,rmbranch,rmelem), the type manager runs as a child process of cleartool/GUI/multitool-import.