Linux Error Codes Enoent
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DESCRIPTION top The
Linux Errno Example
calls and some library functions in the event of an error to indicate posix error codes what went wrong. Its value is significant only when the return value of the call indicated an error (i.e., -1
Errno.h Linux Kernel
from most system calls; -1 or NULL from most library functions); a function that succeeds is allowed to change errno. Valid error numbers are all nonzero; errno is never set to zero linux errno to string by any system call or library function. For some system calls and library functions (e.g., getpriority(2)), -1 is a valid return on success. In such cases, a successful return can be distinguished from an error return by setting errno to zero before the call, and then, if the call returns a status that indicates that an error may have occurred, checking to see if errno.h windows errno has a nonzero value. errno is defined by the ISO C standard to be a modifiable lvalue of type int, and must not be explicitly declared; errno may be a macro. errno is thread-local; setting it in one thread does not affect its value in any other thread. All the error names specified by POSIX.1 must have distinct values, with the exception of EAGAIN and EWOULDBLOCK, which may be the same. Below is a list of the symbolic error names that are defined on Linux. Some of these are marked POSIX.1, indicating that the name is defined by POSIX.1-2001, or C99, indicating that the name is defined by C99. 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 (may be the same value as EWOULDBLOCK) (POSIX.1) EALREADY Connection already in progress (POSIX.1) EBADE Invalid exchange EBADF Bad file descriptor (POSIX.1) EBADFD File descriptor in bad state EBADMSG Bad message (POSIX.1) EBADR Invalid request descriptor EBADRQC Invalid request code EBADSLT Invalid slot EBUSY Device or resource busy (POSIX.1) ECANCELED Operation
In C programming language, there is no direct support for error handling. You have to detect the failure and
Errno.h In C
handle the error. In C programming language, return values represents success efault or failure. Inside a C program, when a function fails, you should handle the errors accordingly, or at
Ebadf
least record the errors in a log file. When you are running some program on Linux environment, you might notice that it gives some error number. For example, "Error http://man7.org/linux/man-pages/man3/errno.3.html no is : 17", which doesn't really say much. You really need to know what error number 17 means. This article shows all available error numbers along with it descriptions. This article might be a handy reference for you, when you encounter an error number and you would like to know what it means. In C programming language, http://www.thegeekstuff.com/2010/10/linux-error-codes there is an external variable called "errno". From this errno variable you can use some error handling functions to find out the error description and handle it appropriately. You have to include errno.h header file to use external variable errno. perror function prints error description in standard error. The strerror function returns a string describing the error code passed in the argument errnum. The following C code snippet tries to open a file through open system call. There are two flags in the open call. O_CREAT flag is to create a file, if the file does not exist. 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
6 #define ESRCH 3 /* No such process */ 7 #define EINTR 4 /* Interrupted system call */ 8 #define EIO 5 /* I/O error */ 9 #define ENXIO 6 /* No such device or address */ 10 http://kernelhistory.sourcentral.org/linux-0.99.3/S/32.html #define E2BIG 7 /* Arg list too long */ 11 #define ENOEXEC 8 /* Exec format error */ 12 #define EBADF 9 /* Bad file number */ 13 #define ECHILD 10 /* No child processes http://stackoverflow.com/questions/22018340/how-to-read-npm-enoent-errors */ 14 #define EAGAIN 11 /* Try again */ 15 #define ENOMEM 12 /* Out of memory */ 16 #define EACCES 13 /* Permission denied */ 17 #define EFAULT 14 /* Bad address */ error codes 18 #define ENOTBLK 15 /* Block device required */ 19 #define EBUSY 16 /* Device or resource busy */ 20 #define EEXIST 17 /* File exists */ 21 #define EXDEV 18 /* Cross-device link */ 22 #define ENODEV 19 /* No such device */ 23 #define ENOTDIR 20 /* Not a directory */ 24 #define EISDIR 21 /* Is a directory */ 25 #define EINVAL 22 /* Invalid argument */ linux error codes 26 #define ENFILE 23 /* File table overflow */ 27 #define EMFILE 24 /* Too many open files */ 28 #define ENOTTY 25 /* Not a typewriter */ 29 #define ETXTBSY 26 /* Text file busy */ 30 #define EFBIG 27 /* File too large */ 31 #define ENOSPC 28 /* No space left on device */ 32 #define ESPIPE 29 /* Illegal seek */ 33 #define EROFS 30 /* Read-only file system */ 34 #define EMLINK 31 /* Too many links */ 35 #define EPIPE 32 /* Broken pipe */ 36 #define EDOM 33 /* Math argument out of domain of func */ 37 #define ERANGE 34 /* Math result not representable */ 38 #define EDEADLK 35 /* Resource deadlock would occur */ 39 #define ENAMETOOLONG 36 /* File name too long */ 40 #define ENOLCK 37 /* No record locks available */ 41 #define ENOSYS 38 /* Function not implemented */ 42 #define ENOTEMPTY 39 /* Directory not empty */ 43 #define ELOOP 40 /* Too many symbolic links encountered */ 44 #define EWOULDBLOCK EAGAIN /* Operation would block */ 45 #define ENOMSG 42 /* No message of desired type */ 46 #define EIDRM 43 /* Identifier removed */ 47 #define ECHRNG 44 /* Channel number
here for a quick overview of the site Help Center Detailed answers to any questions you might have Meta Discuss the workings and policies of this site About Us Learn more about Stack Overflow the company Business Learn more about hiring developers or posting ads with us Stack Overflow Questions Jobs Documentation Tags Users Badges Ask Question x Dismiss Join the Stack Overflow Community Stack Overflow is a community of 6.2 million programmers, just like you, helping each other. Join them; it only takes a minute: Sign up How to read npm ENOENT errors up vote 7 down vote favorite I've got 2 ENOENT errors. I know "ENOENT" means "Error NO ENTrance", but what exactly is missing in these two ENOENTs? What do these error messages mean? I would like to decipher them to be able to debug the problems. npm ERR! Error: ENOENT, lstat '/home/ubuntu/.npm/iconv-lite/0.2.11/package/encodings/table/gbk.js' npm ERR! If you need help, you may report this *entire* log, npm ERR! including the npm and node versions, at: npm ERR!