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Eintr Error Code


Is it wrong because of documentation or superstition? Macro: int ESOCKTNOSUPPORT The socket type is not supported. I've tried to keep the examples simple. Macro: int EXDEV An attempt to make an improper link across file systems was detected. navigate here

This might at first appear to cause unreliable behavior on record-oriented devices (including datagram sockets; see Datagrams), where splitting one read or write into two would read or write two records. See Creating a Socket. Setting SA_RESTART does the exact opposite. Additionally, If you are implementing a blocking function yourself, take care to return EINTR when you encounter a signal. http://www.gnu.org/s/libc/manual/html_node/Error-Codes.html

Linux Kernel Error Codes

Am I missing something? The book focuses on the following topics:Memory management, including file buffering, process swapping, and Direct memory Access (DMA) The Virtual Filesystem layer and the Second and Third Extended FilesystemsProcess creation and Quick Navigation C Programming Top Site Areas Settings Private Messages Subscriptions Who's Online Search Forums Forums Home Forums General Programming Boards C++ Programming C Programming C# Programming Game Programming Networking/Device Communication Macro: int EIO Input/output error; usually used for physical read or write errors.

share|improve this answer answered Sep 8 '14 at 17:38 John Hascall 5,78541942 I have read it, for the reffered system calls I have handled the EINTR. errno is thread-local; setting it in one thread does not affect its value in any other thread. POSIX specification defines that when signal (such as Ctrl+C) is caught, recv returns EINTR error. Eintr Signal Three rings to rule them all How to challenge optimized player with Sharpshooter feat Very simple number line with points What is the difference between SAN and SNI SSL certificates?

Macro: int EUSERS The file quota system is confused because there are too many users. In BSD and GNU, the number of open files is controlled by a resource limit that can usually be increased. Can 'it' be used to refer to a person? Why do the do it?

block signals 2. Linux Errno Example How is the 3rd listing supposed to behave differently from the 2nd one?? more stack exchange communities company blog Stack Exchange Inbox Reputation and Badges sign up log in tour help Tour Start here for a quick overview of the site Help Center Detailed For details of in-depth Linux/UNIX system programming training courses that I teach, look here.

Eintr Errno

This way the rest of your code never have to deal with EINTR. http://man7.org/linux/man-pages/man3/errno.3.html My adviser wants to use my code for a spin-off, but I want to use it for my own company Looking for a term like "fundamentalism", but without a religious connotation Linux Kernel Error Codes Macro: int EPERM Operation not permitted; only the owner of the file (or other resource) or processes with special privileges can perform the operation. Eintr Select What now?" answered mostly by "Just restart the interrupted function." None of this helps much when you want to correctly handle EINTR, actually understand what you are doing and why.

View and manage file attachments for this page. check over here Macro: int ETOOMANYREFS ??? If you specify the SA_RESTART flag, return from that handler will resume a primitive; otherwise, return from that handler will cause EINTR. Related 6Unit testing error conditions - EINTR1EINTR error for semop call3Handling EINTR (with goto?)10System call interrupted by a signal still has to be completed8How to know if a Linux system call Eintr Linux

If you use sigaction to establish a signal handler, you can specify how that handler should behave. Join them; it only takes a minute: Sign up When to check for EINTR and repeat the function call? If set, and a function specified as interruptible is interrupted by this signal, the function shall restart and shall not fail with EINTR unless otherwise specified. his comment is here So, I think the example should be expanded showing how to install the SIGINT handler by using sigaction.

This often indicates a cycle of symbolic links. Posix Error Codes Thus, your program will never actually see EPIPE unless it has handled or blocked SIGPIPE. For example, trying to mount an ordinary file as a file system in Unix gives this error.

If so, is there a reference procedure somewhere?

Is the sum of two white noise processes also a white noise? Refer to the manual, for example : http://man7.org/linux/man-pages/man2/accept.2.html. EDIT: Please note that to make blocking fuctions like recv return EINTR you may have to use sigaction() with SA_RESTART set to zero instead of signal() on some operating systems. C Programming Error Codes Many system calls refer to such things.

Options Unfold by Ambroz Bizjak (guest), 07 Nov 2012 12:26 Fold martin_sustrik 07 Nov 2012 12:28 Yes. Then the user pressed Ctrl+C. However, there's no guarantee that new data will arrive in a reasonable time, so pressing Ctrl+C may seem to have no effect. weblink The kernel handles all interactions between the CPU and the external world, and determines which programs will share processor time, in what order.

Why doesn't Rey sell BB8? Should I handle EINTR for the calls or the SA_RESTART is enough? –Efstathios Chatzikyriakidis Sep 8 '14 at 18:34 EINTR and EAGAIN mean different things. After some investigation, it turned out that Python runtime works more or less like the examples above. Macro: int EPROTOTYPE The socket type does not support the requested communications protocol.

Change the name (also URL address, possibly the category) of the page. Typically, POSIX applications that use signal handlers must check for EINTR after each library function that can return it, in order to try the call again. share|improve this answer edited Feb 10 '11 at 16:39 answered Feb 10 '11 at 16:30 Ricko M 82521537 The link might be of interest when writing signal handlers, but This is said from Google people in Android and Chrome projects. –Efstathios Chatzikyriakidis Sep 8 '14 at 18:19 @EfstathiosChatzikyriakidis: If that's permitted by the standard, it will say it

However, consider this example (pretty common ZeroMQ use case): User calls zmq_recv (a blocking function) to get some work. What happened was that user called ZeroMQ's recv function from Python, which started waiting for incoming data. Macro: int ENOENT No such file or directory. However, interrupting the program using Ctrl+C kills it immediately, which may be a problem if we want to do some clean-up, for example, release some system-wide resources.

That allows the event loop to wrap over and check the 'stop' variable: volatile int stop = 0; void handler (int) { stop = 1; } void event_loop (int sock) { POSIX specifies one approach: make the primitive fail right away. So, I am a little bit confused. Browse other questions tagged c posix interrupt system-calls eintr or ask your own question.

If, for example, the main application already has a signalfd handling Ctrl+C signal, creating a new signalfd in the library causes the signal to be delivered alternatively to the main application Should I handle EINTR for the calls or the SA_RESTART is enough? –Efstathios Chatzikyriakidis Sep 8 '14 at 18:35 add a comment| up vote 1 down vote There is a section Exiting the recv function with EINTR in case of signal solved the problem. Does every DFA contain a loop?

Is it be good practice or is it something like magic? –Efstathios Chatzikyriakidis Sep 8 '14 at 18:13 Any other ideas? Here is how I register signal handlers : https://gitorious.org/zepto-web-server/zepto-web-server/source/b1b03b9ecccfe9646e34caf3eb04689e2bbc54dd:src/signal-dispatcher-utility.c With this configuration: https://gitorious.org/zepto-web-server/zepto-web-server/source/b1b03b9ecccfe9646e34caf3eb04689e2bbc54dd:src/server-signals-support-utility.c Also here is a commit that I added some EINTR/EAGAIN handling in some system calls that I know On GNU/Hurd systems, this error can happen for many calls when the object does not support the particular operation; it is a generic indication that the server knows nothing to do Googling on that error mnemonic should get you the answer, quickly. 02-22-2010 #3 Rede View Profile View Forum Posts Registered User Join Date Feb 2010 Posts 13 thank you Adak, yes