c

19962013 Ericsson AB. All Rights Reserved. Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at http://www.apache.org/licenses/LICENSE-2.0 Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License. c Joe Armstrong 1 96-10-30 B

c Command Interface Module

The c module enables users to enter the short form of some commonly used commands.

These functions are are intended for interactive use in the Erlang shell only. The module prefix may be omitted.

Stack backtrace for a process

Stack backtrace for a process. Equivalent to erlang:process_display(Pid, backtrace).

Compile and load code in a file

c/1,2 compiles and then purges and loads the code for a file. Options defaults to []. Compilation is equivalent to:


compile:file(File, Options ++ [report_errors, report_warnings])

Note that purging the code means that any processes lingering in old code for the module are killed without warning. See code/3 for more information.

Change working directory

Changes working directory to Dir, which may be a relative name, and then prints the name of the new working directory.

2> cd("../erlang").
/home/ron/erlang

Flush any messages sent to the shell

Flushes any messages sent to the shell.

Help information

Displays help information: all valid shell internal commands, and commands in this module.

Information about the system

i/0 displays information about the system, listing information about all processes. ni/0 does the same, but for all nodes the network.

Information about pid <X.Y.Z>

Displays information about a process, Equivalent to process_info(pid(X, Y, Z)), but location transparent.

Load or reload module

Purges and loads, or reloads, a module by calling code:purge(Module) followed by code:load_file(Module).

Note that purging the code means that any processes lingering in old code for the module are killed without warning. See code/3 for more information.

lc(Files) -> ok Files = [File] File = file:filename() Compile a list of files

Compiles a list of files by calling compile:file(File, [report_errors, report_warnings]) for each File in Files.

List files in the current directory

Lists files in the current directory.

List files in a directory or a single file

Lists files in directory Dir or, if Dir is a file, only list it.

Which modules are loaded

Displays information about the loaded modules, including the files from which they have been loaded.

Information about a module

Displays information about Module.

Memory allocation information

Memory allocation information. Equivalent to erlang:memory/0 .

Memory allocation information

Memory allocation information. Equivalent to erlang:memory/1 .

Compile and load code in a file on all nodes

Compiles and then loads the code for a file on all nodes. Options defaults to []. Compilation is equivalent to:


compile:file(File, Options ++ [report_errors, report_warnings])

Load module on all nodes

Loads Module on all nodes.

Convert X,Y,Z to a pid

Converts X, Y, Z to the pid ]]>. This function should only be used when debugging.

Print working directory

Prints the name of the working directory.

Quit - shorthand for init:stop()

This function is shorthand for init:stop(), that is, it causes the node to stop in a controlled fashion.

Information about registered processes

regs/0 displays information about all registered processes. nregs/0 does the same, but for all nodes in the network.

Print node uptime

Prints the node uptime (as given by erlang:statistics(wall_clock)), in human-readable form.

xm(ModSpec) -> void() Cross reference check a module ModSpec = Module | Filename Module = atom() Filename = string()

This function finds undefined functions, unused functions, and calls to deprecated functions in a module by calling xref:m/1.

y(File) -> YeccRet Generate an LALR-1 parser File = name() -- see filename(3) YeccRet = -- see yecc:file/2

Generates an LALR-1 parser. Equivalent to:


yecc:file(File)

y(File, Options) -> YeccRet Generate an LALR-1 parser File = name() -- see filename(3) Options, YeccRet = -- see yecc:file/2

Generates an LALR-1 parser. Equivalent to:


yecc:file(File, Options)