readlink: Print value of a symlink or canonical file namereadlink may work in one of two supported modes:
readlink outputs the value of the given symbolic links.
If readlink is invoked with an argument other than the name
of a symbolic link, it produces no output and exits with a nonzero exit code.
readlink outputs the absolute name of the given files which contain
no ., .. components nor any repeated separators
(/) or symbolic links. The realpath command is the
preferred command to use for canonicalization. See realpath: Print the resolved file name..
readlink [option]… file…
By default, readlink operates in readlink mode.
The program accepts the following options. Also see Common options.
Activate canonicalize mode.
If any component of the file name except the last one is missing or unavailable,
readlink produces no output and exits with a nonzero exit
code. A trailing slash is ignored.
Activate canonicalize mode.
If any component is missing or unavailable, readlink produces
no output and exits with a nonzero exit code. A trailing slash
requires that the name resolve to a directory.
Activate canonicalize mode.
If any component is missing or unavailable, readlink treats it
as a directory.
Do not print the output delimiter, when a single file is specified. Print a warning if specified along with multiple files.
Suppress most error messages. On by default.
Report error messages.
Output a zero byte (ASCII NUL) at the end of each line, rather than a newline. This option enables other programs to parse the output even when that output would contain data with embedded newlines.
The readlink utility first appeared in OpenBSD 2.1.
The realpath command without options, operates like
readlink in canonicalize mode.
An exit status of zero indicates success, and a nonzero value indicates failure.