alias - define or display aliases
alias [alias-name[=string] ...]
The alias utility shall create or redefine alias definitions or write the values of existing alias definitions to standard output. An alias definition provides a string value that shall replace a command name when it is encountered; see Alias Substitution .
An alias definition shall affect the current shell execution environment and the execution environments of the subshells of the current shell. When used as specified by this volume of IEEE Std 1003.1-2001, the alias definition shall not affect the parent process of the current shell nor any utility environment invoked by the shell; see Shell Execution Environment .
The following operands shall be supported:
Write the alias definition to standard output.
Assign the value of string to the alias alias-name.
If no operands are given, all alias definitions shall be written to standard output.
The following environment variables shall affect the execution of alias:
Provide a default value for the internationalization variables that are unset or null. (See the Base Definitions volume of IEEE Std 1003.1-2001, Section 8.2, Internationalization Variables for the precedence of internationalization variables used to determine the values of locale categories.)
If set to a non-empty string value, override the values of all the other internationalization variables.
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).
Determine the locale that should be used to affect the format and contents of diagnostic messages written to standard error.
Determine the location of message catalogs for the processing of LC_MESSAGES .
The format for displaying aliases (when no operands or only name operands are specified) shall be:
"%s=%s\n", name, value
The value string shall be written with appropriate quoting so that it is suitable for reinput to the shell. See the description of shell quoting in Quoting .
The standard error shall be used only for diagnostic messages.