(features.info)Bourne Shell Builtins
Bourne Shell Builtins
The following shell builtin commands are inherited from the Bourne
shell. These commands are implemented as specified by the Posix 1003.2
Do nothing beyond expanding any arguments and performing
Read and execute commands from the FILENAME argument in the
current shell context.
Exit from a `for', `while', or `until' loop.
Change the current working directory.
Resume the next iteration of an enclosing `for', `while', or
Print the arguments, separated by spaces, to the standard output.
The arguments are concatenated together into a single command,
which is then read and executed.
If a COMMAND argument is supplied, it replaces the shell. If no
COMMAND is specified, redirections may be used to affect the
current shell environment.
Exit the shell.
Mark the arguments as variables to be passed to child processes in
Parse options to shell scripts or functions.
Remember the full pathnames of commands specified as arguments, so
they need not be searched for on subsequent invocations.
Send a signal to a process.
Print the current working directory.
Read a line from the shell input and use it to set the values of
Mark variables as unchangable.
Cause a shell function to exit with a specified value.
Shift positional parameters to the left.
Evaluate a conditional expression.
Print out the user and system times used by the shell and its
Specify commands to be executed when the shell receives signals.
Set the shell process's file creation mask.
Cause shell variables to disappear.
Wait until child processes exit and report their exit status.
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