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Linux Error Codes Eagain


Macro: int ERANGE Range error; used by mathematical functions when the result value is not representable because of overflow or underflow. See Connecting. Bash 101 Hacks eBook Sed and Awk 101 Hacks eBook Vim 101 Hacks eBook Nagios Core 3 eBook Copyright © 2008–2015 Ramesh Natarajan. The fields msg_iov and msg_iovlen describe scatter-gather locations, as discussed in readv(2). navigate to this website

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, When recvmsg() is called, msg_controllen should contain the length of the available buffer in msg_control; upon return from a successful call it will contain the length of the control message sequence. Examples: /* * The following program makes an illegal call * to the write() function, then prints the * value held in errno. */ #include #include #include #include Macro: int ESPIPE Invalid seek operation (such as on a pipe).

Linux Kernel Error Codes

The recv() call is normally used only on a connected socket (see connect(2)) and is identical to recvfrom() with a NULL src_addr argument. When you are running some program on Linux environment, you might notice that it gives some error number. The Python Software Foundation is a non-profit corporation. This article shows all available error numbers along with it descriptions.

The documentation for a function might list special meanings for certain values of errno, but this doesn't mean that these are necessarily the only values that the function might set. The flags argument is int in 4.x BSD, but unsigned int in libc4 and libc5. There is one other important consideration. Linux Errno To String This flag is useful for the same reasons as the O_CLOEXEC flag of open(2).

In C programming language, return values represents success or failure. I will be posting instruction guides, how-to, troubleshooting tips and tricks on Linux, database, hardware, security and web. If yes then after how much time should I try again. http://www.gnu.org/s/libc/manual/html_node/Error-Codes.html Macro: int ETOOMANYREFS ???

It can contain several flags: MSG_EOR indicates end-of-record; the data returned completed a record (generally used with sockets of type SOCK_SEQPACKET). Errno.h In C Link Felix Frank October 21, 2010, 8:16 am Hi, good thinking, but this article desperately lacks a reference to perror. This change could cause incompatibility problems in code that's been compiled with the old value of EALREADY. Macro: int ESOCKTNOSUPPORT The socket type is not supported.

Linux Errno Example

Macro: int EACCES Permission denied; the file permissions do not allow the attempted operation. Notes The prototypes given above follow glibc2. Linux Kernel Error Codes This can mean that the device file was installed incorrectly, or that the physical device is missing or not correctly attached to the computer. Posix Error Codes Is there any particular strategy to be followed 2) Is buffer size has exceeded its limits is the only reason ? 3) Can someone please give me a better idea/code, how

Macro: int EBADF Bad file descriptor; for example, I/O on a descriptor that has been closed or reading from a descriptor open only for writing (or vice versa). useful reference Macro: int EPROGMISMATCH ??? This is a “file doesn’t exist” error for ordinary files that are referenced in contexts where they are expected to already exist. For instance, errno.errorcode[errno.EPERM] maps to 'EPERM'. Errno.h Linux Kernel

Spaced-out numbers When is it okay to exceed the absolute maximum rating on a part? Macro: int ECONNABORTED A network connection was aborted locally. Some of these error codes can’t occur on GNU systems, but they can occur using the GNU C Library on other systems. http://softacoustik.com/error-codes/linux-io-error-codes.php In C programming language, there is an external variable called "errno".

Name Value Meaning POSIX? Errno.h Windows What examples are there of funny connected waypoint names or airways that tell a story? Sambit.

Macro: int ECONNREFUSED A remote host refused to allow the network connection (typically because it is not running the requested service).

E2BIG 7 Argument list is too long Yes EACCES 13 Permission denied Yes EADDRINUSE 248 Address is already in use Yes EADDRNOTAVAIL 249 Can't assign requested address Yes EADV 68 Advertise In BSD and GNU, the number of open files is controlled by a resource limit that can usually be increased. A temporary resource shortage made an operation impossible. Efault 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,

Macro: int EFBIG File too big; the size of a file would be larger than allowed by the system. errno.errorcodeĀ¶ Dictionary providing a mapping from the errno value to the string name in the underlying system. Macro: int ESHUTDOWN The socket has already been shut down. get redirected here MSG_PEEK This flag causes the receive operation to return data from the beginning of the receive queue without removing that data from the queue.

The receive calls normally return any data available, up to the requested amount, rather than waiting for receipt of the full amount requested. Macro: int EWOULDBLOCK In the GNU C Library, this is another name for EAGAIN (above). network-programming share|improve this question asked Oct 21 '10 at 16:40 PhiberOptixz 6028 add a comment| 2 Answers 2 active oldest votes up vote 3 down vote From send(): "EAGAIN -- The Inside a C program, when a function fails, you should handle the errors accordingly, or at least record the errors in a log file.

See Also fcntl(2), getsockopt(2), read(2), recvmmsg(2), select(2), shutdown(2), socket(2), cmsg(3), sockatmark(3), socket(7) Referenced By getnameinfo(3), getpeername(2), packet(7), perlfunc(1), pth(3), rtime(3), socketcall(2) Site Search Library linux docs linux man pages page load By the way, errno is not always a variable. This variable may be implemented as a macro, but you can always examine or set it as if it were a simple integer variable. You really need to know what error number 17 means.

Macro: int ENOEXEC Invalid executable file format. O_EXCL flag is used with O_CREAT, if the file is already exist open call will fail with the proper error number. $ cat fileopen.c #include #include #include #include Macro: int ED The experienced user will know what is wrong. Portability Note: In many older Unix systems, this condition was indicated by EWOULDBLOCK, which was a distinct error code different from EAGAIN.

Looking up error codes manually is ill advise IMO. For example, trying to mount an ordinary file as a file system in Unix gives this error. Macro: int ENXIO No such device or address. 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

Follow us on Google+ Follow us on Twitter Become a fan on Facebook Support Us Support this blog by purchasing one of my ebooks. The error is supplied in a sock_extended_err structure: #define SO_EE_ORIGIN_NONE 0 #define SO_EE_ORIGIN_LOCAL 1 #define SO_EE_ORIGIN_ICMP 2 #define SO_EE_ORIGIN_ICMP6 3 struct sock_extended_err { uint32_t ee_errno; /* error number */ uint8_t ee_origin; perror function prints error description in standard error. 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