---
name: "aesub"
section: "1"
platform: "linux"
package: "aegis"
version: "4.24.3-3"
release: "Debian 8 (Jessie)"
platforms: ["linux"]
url: "https://new.carta.tech/aesub"
---

# aesub(1)

substitute and echo strings

## NAME

aesub - substitute and echo strings

## SYNOPSIS

**aesub** \[ *option*... \] string ...\
 **aesub** **-Help**\
 **aesub** **-VERSion**

## DESCRIPTION

The *aesub* command is used to perform the usual [*aesub*(5)](/aesub/5.md) substitutions on its command line arguments, and then echo them to the standard output.

### Shell Script Quoting

The [*aesub*(1)](/aesub/1.md) command is often used in shell scripts.  It is important to remember that the shell will do its own substitutions on the command line argument *before* it invokes the [*aesub*(1)](/aesub/1.md) command. Usually, you don't want this to happen, so you need to use *single* (`'`) quotes to do this.  (The shell continues to substitute inside double (`"`) quotes.)

Quote [*aesub*(1)](/aesub/1.md) arguments using `'` *single* `'` quotes.

## OPTIONS

The following options are understood:

- **-BaseLine**

  This option may be used to specify that the project baseline is the subject of the command.

- **-Change** *number*

  This option may be used to specify a particular change within a project. See [*aegis*(1)](/aegis/1.md) for a complete description of this option.

- **-File** *filename*

  Take the text to be substituted from the specified file. The filename \`-' is understood to mean the standard input.

- **-Help**

  This option may be used to obtain more information about how to use the *aesub* program.

- **-Project** *name*

  This option may be used to select the project of interest. When no **-Project** option is specified, the *AEGIS\_PROJECT* environment variable is consulted. If that does not exist, the user's *$HOME/.aegisrc* file is examined for a default project field (see [*aeuconf*(5)](/aeuconf/5.md) for more information). If that does not exist, when the user is only working on changes within a single project, the project name defaults to that project. Otherwise, it is an error.

See also [*aesub*(1)](/aesub/1.md) for options common to all aesub commands.

All options may be abbreviated; the abbreviation is documented as the upper case letters, all lower case letters and underscores (\_) are optional. You must use consecutive sequences of optional letters.

All options are case insensitive, you may type them in upper case or lower case or a combination of both, case is not important.

For example: the arguments "-project, "-PROJ" and "-p" are all interpreted to mean the **-Project** option. The argument "-prj" will not be understood, because consecutive optional characters were not supplied.

Options and other command line arguments may be mixed arbitrarily on the command line, after the function selectors.\

The GNU long option names are understood. Since all option names for *aesub* are long, this means ignoring the extra leading '-'. The "**--***option***=***value*" convention is also understood.

## EXIT STATUS

The *aesub* command will exit with a status of 1 on any error. The *aesub* command will only exit with a status of 0 if there are no errors.

## ENVIRONMENT VARIABLES

See [*aegis*(1)](/aegis/1.md) for a list of environment variables which may affect this command. See [*aepconf*(5)](/aepconf/5.md) for the project configuration file's *project\_specific* field for how to set environment variables for all commands executed by Aegis.

## SEE ALSO

- [**aesub**(5)](/aesub/5.md)

  Available string substitutions.\

## COPYRIGHT

aesub version 4.24.3.D001\
 Copyright (C) 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010 Peter Miller

The aesub program comes with ABSOLUTELY NO WARRANTY; for details use the '*aesub -VERSion License*' command. This is free software and you are welcome to redistribute it under certain conditions; for details use the '*aesub -VERSion License*' command.\

## AUTHOR

| | | |
| --- | --- | --- |
| Peter Miller | E-Mail: | millerp@canb.auug.org.au |
| `/\/\*` | WWW: | http://www.canb.auug.org.au/~millerp/ |