This manual page is part of the POSIX Programmer's Manual. The Linux implementation of this interface may differ (consult the corresponding Linux manual page for details of Linux behavior), or the interface may not be implemented on Linux.
Overview
The link utility shall perform the function call:
link(file1, file2);
A user may need appropriate privileges to invoke the link utility.
Options
None.
Operands
The following operands shall be supported:
file1
The pathname of an existing file.
file2
The pathname of the new directory entry to be created.
Stdin
Not used.
Input files
Not used.
Environment
The following environment variables shall affect the execution of link:
LANG
Provide a default value for the internationalization variables that are unset or null. (See the Base Definitions volume of POSIX.1‐2017, Section 8.2, Internationalization Variables for the precedence of internationalization variables used to determine the values of locale categories.)
LC_ALL
If set to a non-empty string value, override the values of all the other internationalization variables.
LC_CTYPE
Determine the locale for the interpretation of sequences of bytes of text data as characters (for example, single-byte as opposed to multi-byte characters in arguments).
LC_MESSAGES
Determine the locale that should be used to affect the format and contents of diagnostic messages written to standard error.
NLSPATH
Determine the location of message catalogs for the processing of LC_MESSAGES.
Asynchronous events
Default.
Stdout
None.
Stderr
The standard error shall be used only for diagnostic messages.