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realpath(3)
NAME
  realpath - Resolve pathname

SYNOPSIS
  #include <stdlib.h>

  char *realpath(
	  const char *file_name,
	  char *resolved_name );

STANDARDS
  Interfaces documented on this reference page conform to industry standards
  as follows:

  realpath(): POSIX.1, XPG4-UNIX

  Refer to the standards(5) reference page for more information about
  industry standards and associated tags.

DESCRIPTION
  The realpath() function derives, from the file 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 PATH_MAX bytes, in the buffer pointed to by resolved_name.

RETURN VALUES
  Upon successful completion, the realpath() function returns a pointer to
  the resolved name. Otherwise, realpath() 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
  If the realpath() function fails, errno may be set to one of the following
  values:

  [EACCES]
      Read or search permission was denied for a component of file_name.

  [EINVAL]
      Either the file_name or resolved_name argument is a null pointer.

  [EIO]
      An error occurred while reading from the file system.

  [ELOOP]
      Too many symbolic links were encountered in resolving path.

  [ENAMETOOLONG]
      The file_name argument is longer than PATH_MAX or a pathname component
      is longer than NAME_MAX.

  [ENOENT]
      A component of file_name does not name an existing file or file_name
      points to an empty string.

  [ENOMEM]
      Insufficient storage space available.

  [ENOTDIR]
      A component of either path prefix is not a directory.

SEE ALSO
  Functions: getcwd(3), sysconf(3)

  Standards: standards(5)

Index for Section 3

Alphabetical listing for R

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