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(libc.info)File Name Errors

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File Name Errors
----------------

   Functions that accept file name arguments usually detect these
`errno' error conditions relating to the file name syntax or trouble
finding the named file.  These errors are referred to throughout this
manual as the "usual file name errors".

`EACCES'
     The process does not have search permission for a directory
     component of the file name.

`ENAMETOOLONG'
     This error is used when either the total length of a file name is
     greater than `PATH_MAX', or when an individual file name component
     has a length greater than `NAME_MAX'.  Note: Limits for Files.

     In the GNU system, there is no imposed limit on overall file name
     length, but some file systems may place limits on the length of a
     component.

`ENOENT'
     This error is reported when a file referenced as a directory
     component in the file name doesn't exist, or when a component is a
     symbolic link whose target file does not exist.  Note: Symbolic
     Links.

`ENOTDIR'
     A file that is referenced as a directory component in the file name
     exists, but it isn't a directory.

`ELOOP'
     Too many symbolic links were resolved while trying to look up the
     file name.  The system has an arbitrary limit on the number of
     symbolic links that may be resolved in looking up a single file
     name, as a primitive way to detect loops.  Note: Symbolic Links.