c(3)

NAME
c - Command Interface Module

DESCRIPTION

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

  Note:

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

EXPORTS

bt(Pid) -> void()

    Types
        Pid = pid()

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

c(File) -> {ok, Module} | error
c(File, Options) -> {ok, Module} | error

    Types
        File = name() -- see filename(3)
        Options = [Opt] -- see compile:file/2

    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.

cd(Dir) -> void()

    Types
        Dir = name() -- see filename(3)

    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() -> void()

    Flushes any messages sent to the shell.

help() -> void()

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

i() -> void()
ni() -> void()

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

i(X, Y, Z) -> void()

    Types
        X = Y = Z = int()

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

l(Module) -> void()

    Types
        Module = atom()

    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

    Types
        Files = [File]
        File = name() -- see filename(3)

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

ls() -> void()

    Lists files in the current directory.

ls(Dir) -> void()

    Types
        Dir = name() -- see filename(3)

    Lists files in directory Dir .

m() -> void()

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

m(Module) -> void()

    Types
        Module = atom()

    Displays information about Module .

memory() -> [{Type, Size}]

    Types
        Type, Size -- see erlang:memory/0

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

memory(Type) -> Size
memory([Type]) -> [{Type, Size}]

    Types
        Type, Size -- see erlang:memory/0

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

nc(File) -> {ok, Module} | error
nc(File, Options) -> {ok, Module} | error

    Types
        File = name() -- see filename(3)
        Options = [Opt] -- see compile:file/2

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

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

nl(Module) -> void()

    Types
        Module = atom()

    Loads Module on all nodes.

pid(X, Y, Z) -> pid()

    Types
        X = Y = Z = int()

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

pwd() -> void()

    Prints the name of the working directory.

q() -> void()

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

regs() -> void()
nregs() -> void()

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

xm(ModSpec) -> void()

    Types
        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

    Types
        File = name() -- see filename(3)
        YeccRet = -- see yecc:file/2

    Generates an LALR-1 parser. Equivalent to:

    yecc:file(File)

y(File, Options) -> YeccRet

    Types
        File = name() -- see filename(3)
        Options, YeccRet = -- see yecc:file/2

    Generates an LALR-1 parser. Equivalent to:

    yecc:file(File, Options)

SEE ALSO

compile(3) , filename(3) , erlang(3) , yecc(3) , xref(3)