Fix Socket Error Codes Linux Tutorial

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Socket Error Codes Linux


On error, -1 is returned, and errno is set appropriately. Hosting by jambit GmbH. Macro: int EWOULDBLOCK In the GNU C Library, this is another name for EAGAIN (above). Macro: int ESTALE Stale file handle. weblink

Since Linux 2.6.27, the type argument serves a second purpose: in addition to specifying a socket type, it may include the bitwise OR of any of the following values, to modify 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 mcp_achindra View Public Profile View LQ Blog View Review Entries View HCL Entries Visit mcp_achindra's homepage! Macro: int ENAMETOOLONG Filename too long (longer than PATH_MAX; see Limits for Files) or host name too long (in gethostname or sethostname; see Host Identification).

Linux Errno Example

Note that registered members see fewer ads, and ContentLink is completely disabled once you log in. Macro: int ENOBUFS The kernel’s buffers for I/O operations are all in use. I hope this would help.

  • Not the answer you're looking for?
  • Macro: int ETOOMANYREFS ???
  • SOCK_SEQPACKET Provides a sequenced, reliable, two-way connection- based data transmission path for datagrams of fixed maximum length; a consumer is required to read an entire packet with each input system call.
  • MSG_CONFIRM (Since Linux 2.3.15) Tell the link layer that forward progress happened: you got a successful reply from the other side.
  • NOTES top POSIX.1 does not require the inclusion of , and this header file is not required on Linux.
  • Macro: int ED The experienced user will know what is wrong.
  • Macro: int ENXIO No such device or address.
  • Since Linux 2.6, this flag is also supported for UDP sockets, and informs the kernel to package all of the data sent in calls with this flag set into a single
  • Macro: int ENODEV The wrong type of device was given to a function that expects a particular sort of device.

The next operation on this socket will return the error code of the pending error. You have to include errno.h header file to use external variable errno. EINVAL Invalid argument passed. Errno 0 if (s < 0) { perror("socket"); exit(1); } Wrapping it all up - error handling need not be complex and verbose.

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. Errno.h In C The values are always the same, on every operating system. Use packet(7) instead. POSIX.1-2001 only describes the MSG_OOB and MSG_EOR flags.

Often using a debugger to run a program is considered having it open for writing and will cause this error. (The name stands for “text file busy”.) This is not an Ebadf It indicates that the shortage is expected to pass, so your program can try the call again later and it may succeed. We recommend upgrading to the latest Safari, Google Chrome, or Firefox. All gists GitHub Sign up for a GitHub account Sign in Create a gist now Instantly share code, notes, The manifest constants used under 4.x BSD for protocol families are PF_UNIX, PF_INET, and so on, while AF_UNIX, AF_INET, and so on are used for address families.

Errno.h In C

They hope these examples will help you to get a better understanding of the Linux system and that you feel encouraged to try out things on your own. find more asked 1 year ago viewed 1676 times active 1 year ago Related 48Get IP address of an interface on Linux13Find original owning process of a Linux socket1Data is not received correctly Linux Errno Example Macro: int EISCONN You tried to connect a socket that is already connected. Posix Error Codes For sendmsg(), the address of the target is given by msg.msg_name, with msg.msg_namelen specifying its size.

The functions setsockopt(2) and getsockopt(2) are used to set and get options, respectively. have a peek at these guys Thanks! They are not yet documented. To understand the nature of the error these codes need to be interpreted. Errno.h Windows

Macro: int EBADMSG Macro: int EIDRM Macro: int EMULTIHOP Macro: int ENODATA Macro: int ENOLINK Macro: int ENOMSG Macro: int ENOSR Macro: int ENOSTR Macro: int EOVERFLOW Macro: int EPROTO Macro: 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, The system cannot allocate more virtual memory because its capacity is full. check over here In multithreaded programs it is a macro executing a function that returns the last error of the caller thread.

The protocol specifies a particular protocol to be used with the socket. How To Use Errno Macro: int ECHILD There are no child processes. Many Thanks! –Yahya Uddin Nov 24 '14 at 2:38 nit: #define errno (*__get_errno()) would be legal, it's not necessarily a variable, it's a macro "which expands to a modifiable

This error is never generated by GNU/Hurd systems, but it can result from an operation to an NFS server running another operating system.

It is generally portable to/from non- BSD systems supporting clones of the BSD socket layer (including System V variants). I've just "mv"ed a 49GB directory to a bad file path, is it possible to restore the original state of the files? Macro: int EILSEQ While decoding a multibyte character the function came along an invalid or an incomplete sequence of bytes or the given wide character is invalid. Errno To String You signed out in another tab or window.

Only valid on SOCK_DGRAM and SOCK_RAW sockets and currently only implemented for IPv4 and IPv6. The MSG_CONFIRM flag is a Linux extension. HTTPS Learn more about clone URLs Download ZIP Code Revisions 1 Stars 17 Forks 13 TCP socket error codes Raw gistfile1.txt 0 = Success 1 = Operation not permitted 2 = this content 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 == ...)

EMFILE The per-process limit on the number of open file descriptors has been reached. Macro: int ESRCH No process matches the specified process ID. This can mean that the function does not implement a particular command or option value or flag bit at all. Macro: int ENOTDIR A file that isn’t a directory was specified when a directory is required. > Forums > Non-*NIX Forums > Programming Socket Error codes User Name Remember Me? Join our community today! For example, trying to mount an ordinary file as a file system in Unix gives this error. See Also fcntl(2), getsockopt(2), recv(2), select(2), sendfile(2), sendmmsg(2), shutdown(2), socket(2), write(2), cmsg(3), ip(7), socket(7), tcp(7), udp(7) Referenced By getifaddrs(3), if_nameindex(3), lwres_getaddrinfo(3), pth(3), rtime(3), socketcall(2) Site Search Library linux docs linux man

Macro: int EDEADLK Deadlock avoided; allocating a system resource would have resulted in a deadlock situation. The EPIPE error is still returned. Inside a C program, when a function fails, you should handle the errors accordingly, or at least record the errors in a log file. Macro: int EFAULT Bad address; an invalid pointer was detected.