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Why does ENOENT mean "No such file or directory"?

Tags:

c

linux

unix

What does the ENT mean in ENOENT?

Shouldn't the error:

No such file or directory

just be named by ENOFILE?

Is there any story or reason?

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mingchaoyan Avatar asked Nov 11 '13 09:11

mingchaoyan


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3 Answers

It's an abbreviation of Error NO ENTry (or Error NO ENTity), and can actually be used for more than files/directories.

It's abbreviated because C compilers at the dawn of time didn't support more than 8 characters in symbols.

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3 revs, 2 users 50% Avatar answered Oct 04 '22 12:10

3 revs, 2 users 50%


It's simply “No such directory entry”. Since directory entries can be directories or files (or symlinks, or sockets, or pipes, or devices), the name ENOFILE would have been too narrow in its meaning.

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Roland Illig Avatar answered Oct 04 '22 13:10

Roland Illig


For a full list of all the codes and a better description of what each one means see errno.h This is an include file that is part of the C standard library and the comments clarify what the error is about. In this case:

#define ENOENT 2 /* No such file or directory */

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Dror Avatar answered Oct 04 '22 12:10

Dror