Home > Linux Errno > Linux Errno No Error

Linux Errno No Error


See Socket Addresses. You can also simply drop me a line to say hello!. For a connectionless socket (for datagram protocols, such as UDP), you get EDESTADDRREQ instead. Macro: int ERPCMISMATCH ??? http://softacoustik.com/linux-errno/linux-errno-error-codes.php

POSIX compliant operating systems like AIX, Linux or Solaris include many other error values, many of which are used much more often than the above ones, such as EACCES for when To make your program portable, you should check for both codes and treat them the same. Macro: int EFBIG File too big; the size of a file would be larger than allowed by the system. share|improve this answer answered Feb 2 '09 at 17:25 ephemient 118k26178303 1 some people find reading code clearer than reading English truth. –Qix Apr 19 at 18:31 add a comment|

How To Use Errno

If the entire function is not available at all in the implementation, it returns ENOSYS instead. On GNU/Hurd systems, this error never happens; you get a signal instead. Such shortages are usually fairly serious and affect the whole system, so usually an interactive program should report the error to the user and return to its command loop.

Macro: int EWOULDBLOCK In the GNU C Library, this is another name for EAGAIN (above). Macro: int EALREADY An operation is already in progress on an object that has non-blocking mode selected. Do not do this. Errno C++ See Also err(3), error(3), perror(3), strerror(3) Referenced By _syscall(2), cp_avltree_insert(3), cp_narytree_insert(3), cp_rbtree_delete(3), cp_splaytree_delete(3), explain(3), explain_lca2010(1), intro(2), intro(3), ldap_get_dn(3), ldap_initialize(3), lwres_net_ntop(3), math_error(7), syscall(2), zshparam(1), zzip_freopen(3), zzip_open_shared_io(3) Site Search Library linux docs linux

share|improve this answer edited Feb 17 '15 at 23:57 Peter Mortensen 10.3k1369107 answered Feb 2 '09 at 17:15 Sarel Botha 7,83763552 add a comment| up vote 0 down vote I have Errno.h In C For functions that operate on some object given in a parameter, such as a file descriptor or a port, it might instead mean that only that specific object (file descriptor, port, This condition never arises on GNU/Hurd systems. You can use select to find out when the operation will be possible; see Waiting for I/O.

Its value is significant only when the return value of the call indicated an error (i.e., -1 from most system calls; -1 or NULL from most library functions); a function that Errno 0 See Socket Options. Macro: int ED The experienced user will know what is wrong. In C programming language, there is an external variable called "errno".

Errno.h In C

Browse other questions tagged c errno or ask your own question. How is the ATC language structured? How To Use Errno Define your own global variable if you insist on repeating that mistake, else just define return values. –bmargulies Jan 9 '14 at 16:37 If the question is "what should Strerror(errno) Read more about Ramesh Natarajan and the blog.

The system cannot allocate more virtual memory because its capacity is full. this page Macro: int ERANGE Range error; used by mathematical functions when the result value is not representable because of overflow or underflow. Trying the same operation again will block until some external condition makes it possible to read, write, or connect (whatever the operation). GNU Project. 2014-02-08. Errno To String

Macro: int ENFILE There are too many distinct file openings in the entire system. Sample: if(read(fd, buf, 1)==-1) { perror("read"); } The manpages of errno(3) and perror(3) are interesting, too... You get this error when you try to transmit data over a socket, without first specifying a destination for the data. http://softacoustik.com/linux-errno/linux-error-16.php Follow us on Google+ Follow us on Twitter Become a fan on Facebook Support Us Support this blog by purchasing one of my ebooks.

A description of the project, information about reporting bugs, and the latest version of this page, can be found at https://www.kernel.org/doc/man-pages/. 2016-03-15 ERRNO(3) Copyright and license for this manual page HTML Errno.h Windows If the value of errno should be preserved across a library call, it must be saved: if (somecall() == -1) { int errsv = errno; printf("somecall() failed\n"); if (errsv == ...) 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

See File Locks, for an example.

Privacy policy About Wikipedia Disclaimers Contact Wikipedia Developers Cookie statement Mobile view Next: Error Messages, Previous: Checking for Errors, Up: Error Reporting [Contents][Index] 2.2 Error Codes The error code macros I will do something like this : #include int myfunction (void) { int res; /*Some actions....*/ if(success) res = 0; else if (fail) res = -EIO; return res; } I 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. Posix Error Codes ENOBUFS No buffer space available (POSIX.1 (XSI STREAMS option)) ENODATA No message is available on the STREAM head read queue (POSIX.1) ENODEV No such device (POSIX.1) ENOENT No such file or

For instance, errno.errorcode[errno.EPERM] maps to 'EPERM'. Macro: int EPROGMISMATCH ??? How to deal with a coworker who is making fun of my work? useful reference You could explain more each error so that beginners really get the problem behind it (even if it is generic).

Macro: int EDIED On GNU/Hurd systems, opening a file returns this error when the file is translated by a program and the translator program dies while starting up, before it has By the way, errno is not always a variable. Macro: int ENOEXEC Invalid executable file format. Macro: int EPIPE Broken pipe; there is no process reading from the other end of a pipe.

This can mean that the function does not implement a particular command or option value or flag bit at all. Much easier that other methods mentioned by previous posters. Macro: int ENODEV The wrong type of device was given to a function that expects a particular sort of device. Macro: int EUSERS The file quota system is confused because there are too many users.

Below is a list of the symbolic error names that are defined on Linux. This is the same string printed by perror() but it's useful if you're formatting the error message for something other than standard error output. Some functions that must always block (such as connect; see Connecting) never return EAGAIN. This error happens on operations that are supposed to manipulate child processes, when there aren’t any processes to manipulate.

errno is thread-local; setting it in one thread does not affect its value in any other thread. Macro: int ENOMEM No memory available. On Ubuntu: apt-get install errno. Thanks by advance.

Macro: int ETIMEDOUT A socket operation with a specified timeout received no response during the timeout period. However, on (very) old UNIX systems, there may be no and the declaration is needed.