exit $?> >#!/bin/bash COMMAND1 . . . However, most of that kind of thing is esoteric detail of concern only to programmers working on multiple platforms.Even where the error numbers and the symbolic constants are the same, the Trying to delete a non-existent route from the routing table also uses this. #define EINTR 4 /* Interrupted system call */ When a program reads from a "slow" device (a terminal, It will not work with modern versions of the C library. http://crimsonskysoftware.com/unix-error/unix-error-110.html
Share: Chris Herborth ([email protected]), Freelance Writer, Author Close [x] Chris Herborth is an award-winning Senior Technical Writer with more than 10 years of experience writing about operating systems and programming. Contact us Printer Friendly Version The history of the world teaches us that succession is dangerous and that the strong take what they want. Each of these drivers has "stubs.c" code -- code that gets linked into the kernel when the driver is _not_ present -- that returns ENOPKG for certain operations. Inside a C program, when a function fails, you should handle the errors accordingly, or at least record the errors in a log file. https://www.ibm.com/developerworks/aix/library/au-errnovariable/
I will be posting instruction guides, how-to, troubleshooting tips and tricks on Linux, database, hardware, security and web. This article attempts to more fully explain what these errors mean and to give examples of what might cause them. For details of in-depth Linux/UNIX system programming training courses that I teach, look here.
Here's some odd ones:#define ENOPKG 65 #define EISNAM 139 At Rare Error 65 (ENOPKG) occurrence on open() call, Bela Lubkin noted:There are very few things in the kernel that return ENOPKG. So, the thing to keep in mind is that just because you've seen a particular error on a particular platform doesn't mean it is the same somewhere else. The following C code snippet tries to open a file through open system call. Strerror dW Answers Ask a technical question Explore more technical topics Tutorials & training to grow your development skills Back to top static.content.url=http://www.ibm.com/developerworks/js/artrating/SITE_ID=1Zone=AIX and UNIX, Open sourceArticleID=157710ArticleTitle=Errors: errno in UNIX programspublish-date=09052006 About
Seriously, this is the generic and time-honored Unix complaint when you try to do something that needs a character device. Posix Error Codes TCP has the concept of "out of band data" (urgent data). This is true for files as well as IPC communications. invalid for this operation77File descriptor in bad state81f.d.
BSD systems return this if you try to open a pty device that is already in use. http://www.thegeekstuff.com/2010/10/linux-error-codes/ true\" = $?" # 1 # Note that the "!" needs a space between it and the command. # !true leads to a "command not found" error # # The '!' Linux Errno Example Each process has OPEN_MAX file descriptors, and you're trying to open (OPEN_MAX + 1) files. Errno 0 Understand that the numeric codes can vary from Unix to Unix- you really need to look in the /usr/include files to find the symbolic names, and even those are used in
The link() function also fails with EEXIST if the "new" file is not. #define EXDEV 18 /* Cross-device link */ You can't link across filesystems (that's what symbolic links are for). navigate here Interestingly, some Unixes don't have this at all: Unixware, for example returns different errors. #define EFBIG 27 /* File too large */ You've tried to extend a file byond the maximum Richard StevensAgain, keep in mind that this is all examples, and may not apply to your specific platform. Listing 3 shows you how to use this thread-safe version.Listing 3. How To Use Errno
Errno 66: Object is remote Errno 67: Link has been severed Errno 68: Advertise error Errno 69: Srmount error Errno 70: Communication error on send Errno 71: Protocol error Errno 72: See also the Popular Errno Codes by Platform page which displays only errno identifiers that are found on all systems (excluding MS Windows). Traditionally, applications (and the OS itself) don't handle this gracefully, which is why you need to have more RAM than you expect to use, especially on systems that can't dynamically increase Check This Out Learn more.
The article was very informative and was a great help. Strerror Example The no error error value#if !defined( EOK ) # define EOK 0 /* no error */ #endifUsing the sys_nerr global variable and the strerror() function, you can easily whip up some It could be from a physical error, but additionally, an orphaned process (a process whose parent has died) that attempts to read from standard input will get this.
I just tried it and: $ mknod test-m m $ cat test-m cat: cannot open test-m: Is a name file (error 139) EISNAM is not ENOPKG. Re: List standard Unix error codes (less output, more code) by tye (Sage) on Jul 16, 2003 at 18:01UTC I don't like to see "Unknown error" dozens of times. This is the opposite of the EISDIR error.ENOTEMPTY -- The specified directory isn't empty, but it needs to be. Errno.h In C It's used for many IPC errors also. #define ENFILE 23 /* File table overflow */ When the system itself can open no more files, this is the error returned. #define EMFILE
Showing off all of your errors// Print out all known errors on the system. For this article, I used:Unix Internals by Steve Pate Unix Network Programming by W. On BSD platforms, bind() can return this when trying to bind a reserved port number if all are in use. this contact form On other OSes, $^E may give more relevant output than $!