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Specifically, this is the case for pthread_cond_wait and pthread_mutex_lock. Macro: int EADDRINUSE The requested socket address is already in use. For starters, the period between the check and the recv is extremely short and it is thus very unlikely that the signal handler gets executed precisely at that point. It would also make no sense from a logical perspective. http://strongboxlinux.com/error-codes/eintr-error-4.php

This condition is detected by the exec functions; see Executing a File. Not the answer you're looking for? Some functions that must always block (such as connect; see Connecting) never return EAGAIN. thank u!

Eintr Errno

Do not do this. The time now is 02:58 PM. Hot Network Questions Is there a word for an atomic unit of flour? If the library exposes a blocking function,you can extend it to expose a p* variant of the function (for example, ZeroMQ could expose zmq_precv in addition to zmq_recv).

Macro: int ECONNRESET A network connection was closed for reasons outside the control of the local host, such as by the remote machine rebooting or an unrecoverable protocol violation. Instead of remembering these intricacies you can just remember a simple rule of thumb: When handling EINTR error, check any conditions that may have been altered by signal handlers. The typical code sequence (assuming a read operation and assuming that we want to restart the read even if it's interrupted) would be again: if ((n = read(fd, buf, BUFFSIZE)) < Eintr Signal The default choice in the GNU C Library is to make primitives fail with EINTR.

However, be sure to set both ends of the pipe to non-blocking. Change the name (also URL address, possibly the category) of the page. Macro: int ESHUTDOWN The socket has already been shut down. try this E2BIG Argument list too long (POSIX.1) EACCES Permission denied (POSIX.1) EADDRINUSE Address already in use (POSIX.1) EADDRNOTAVAIL Address not available (POSIX.1) EAFNOSUPPORT Address family not supported (POSIX.1) EAGAIN Resource temporarily unavailable

You have no idea what your program might be doing when the signal arrives. Linux Errno Example which was how libraries should approach the problem. Browse other questions tagged nonblocking eintr or ask your own question. Macro: int ECONNREFUSED A remote host refused to allow the network connection (typically because it is not running the requested service).

Eintr Linux

Why can't QEMU allocate the memory if the Linux caches are too big? asked 3 years ago viewed 3519 times active 1 year ago Related 325Non-blocking read on a subprocess.PIPE in python0Socket Read In Multi-Threaded Application Returns Zero Bytes or EINTR (104)4IO#read blocks on Eintr Errno Or if you're very evil you can try to override the signal handler temporarily. Eintr Select asked 5 years ago viewed 19219 times active 10 months ago Get the weekly newsletter!

In any case, I insist that listing2 and listing3 have no different behavior. I found an explanation and a useful macro for primitives in GNU libc documentation: TEMP_FAILURE_RETRY Example: TEMP_FAILURE_RETRY (read_return = read((int)example_fifo, buffer, (size_t)n)); if (read_return==-1){ fprintf(stderr, "reader.c: read_fifo: read(): %s \n", strerror(errno)); Macro: int EREMOTE An attempt was made to NFS-mount a remote file system with a file name that already specifies an NFS-mounted file. (This is an error on some operating systems, Furthermore, it means the EINTR would simply get swallowed by the function and the caller would lose any indication that it occurred. Linux Kernel Error Codes

POSIX specification defines that when signal (such as Ctrl+C) is caught, recv returns EINTR error. In an event driven application you can block all signals and only unblock them for the duration of pselect()/epoll_pwait() call. more hot questions question feed about us tour help blog chat data legal privacy policy work here advertising info mobile contact us feedback Technology Life / Arts Culture / Recreation Science navigate here Reply Options Unfold by Nico (guest), 16 Dec 2012 22:04 Fold Nico (guest) 16 Dec 2012 22:05 FYI, this technique goes back a long time.

This often indicates a cycle of symbolic links. Posix Error Codes Why can a system of linear equations be represented as a linear combination of vectors? if we need more data, goto 2 (yes, 2, so we don't miss a signal) 7.

And let's pretend there's no EINTR and recv just continues waiting for data whatever happens: void event_loop (int sock) { while (1) { char buf [1]; recv (sock, buf, 1, 0);

Is the sum of two white noise processes also a white noise? I don't understand EINTR means and I also cannot find its definition in my whole program packet. I tend to approve your current strategy (of aborting operation on EINTR and reporting that to the caller), but it may depend upon what is your library doing... –Basile Starynkevitch Dec Eintr Read The system cannot allocate more virtual memory because its capacity is full.

Macro: int E2BIG Argument list too long; used when the arguments passed to a new program being executed with one of the exec functions (see Executing a File) occupy too much Is there any guarantee that you cannot get EINTR if the packet has been transmitted? Options Unfold by Ambroz Bizjak (guest), 07 Nov 2012 12:23 Fold Ambroz Bizjak (guest) 07 Nov 2012 12:26 I think you're misinterpreting the meaning of "blocked". This error never occurs on GNU/Hurd systems.

The problem here is that you have to somehow force the blocking function to exit when signal happens. Last edited on 07 Nov 2012 12:28 by martin_sustrik Show more Options Unfold by martin_sustrik, 07 Nov 2012 12:28 Fold Ambroz Bizjak (guest) 07 Nov 2012 12:35 I don't see a Macro: int EINVAL Invalid argument. This trick is even applicable in libraries.

Next: Generating Signals, Previous: Defining Handlers, Up: Signal Handling [Contents][Index] 250bpm Home Libmill Nanomsg ZeroMQ Ribosome Contact Create account or Sign in EINTR and What It Is Good For Previous: Macro: int ENOTEMPTY Directory not empty, where an empty directory was expected. Macro: int ENOBUFS The kernel’s buffers for I/O operations are all in use. What's the problem with that?

You can use select to find out when the operation will be possible; see Waiting for I/O. EDIT: It was suggested by Justin Cormack that signalfd can be used to solve the last problem. User of the library can use this function to handle signals in a race-free way. Train and bus costs in Switzerland Male header pins on Arduino Uno Invariants of higher genus curves What is the difference between SAN and SNI SSL certificates?