| REALPATH(1) | General Commands Manual | REALPATH(1) | 
realpath —
| realpath | [ -eEq] [path ...] | 
realpath utility uses the
  realpath(3) function to
  resolve all symbolic links, extra ‘/’
  characters and references to /./ and
  /../ in each path, and writes
  the result of each to standard output followed by a newline. If
  path is absent, the current working directory
  (‘.’) is assumed.
With the -E option (the default) it is not
    an error for the final component of the resolved pathname to reference a
    file which does not exist.
The -e option reverses the effect of
    -E, requiring the path to
    resolve to an existing pathname.
If -q is specified, warnings will not be
    printed when realpath(3)
    fails. Messages about other errors, such as bad usage, are still
  printed.
On error, nothing is written to standard output for that
    path. If -q was not given a
    diagnostic is written to standard error.
realpath utility exits 0 on success,
  and >0 if an error occurs. Any failure to resolve a
  path is an error for this purpose, the
  -q option is irrelevant.
realpath utility is expected to comply with the
  forthcoming edition of the POSIX standard. To be fully POSIX compliant,
  applications must use either the -e or
  -E option, as which of those (if in fact either, and
  not some other behaviour) applies in their absence is unspecified. The
  standard requires support for only a single, mandatory,
  path argument.
realpath utility first appeared in
  FreeBSD 4.3 and was imported into
  NetBSD 10, but modified to be slightly more compatible
  with the coreutils version, and the proposed POSIX standard requirements.
| July 21, 2022 | NetBSD 10.0 |