realpath(3X) realpath(3X)
NAME
realpath - resolve pathname
SYNOPSIS
DESCRIPTION
The function derives, from the pathname pointed to by file_name, an absolute pathname that names the same file, whose resolution does not
involve or symbolic links. The generated pathname is stored, up to a maximum of bytes, in the buffer pointed to by resolved_name.
RETURN VALUE
On successful completion, returns a pointer to the resolved name. Otherwise, returns a null pointer and sets errno to indicate the error,
and the contents of the buffer pointed to by resolved_name are undefined.
ERRORS
The function will fail if:
Read or search permission was denied for a component of
file_name.
Either the file_name or resolved_name argument is a null pointer.
An error occurred while reading from the file system.
Too many symbolic links were encountered in resolving
path.
The file_name argument is longer than or a pathname component is longer than
A component of file_name does not name an existing file or file_name points to an empty string.
A component of the path prefix is not a directory.
The function may fail if:
Pathname resolution of a symbolic link produced an intermediate result whose
length exceeds
Insufficient storage space is available.
SEE ALSO
sysconf(2), getcwd(3C), thread_safety(5), glossary(9), <stdlib.h>.
CHANGE HISTORY
First released in Issue 4, Version 2.
realpath(3X)
