c (3erl)

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.

bt(Pid) -> ok | undefined

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 = file:name()

Options = [compile:option()]

Module = module()

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) -> ok

Types:

Dir = file:name()

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() -> ok

Flushes any messages sent to the shell.

help() -> ok

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

i() -> ok

ni() -> ok

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) -> [{atom(), term()}]

Types:

X = Y = Z = integer() >= 0

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

l(Module) -> code:load_ret()

Types:

Module = 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

Types:

Files = [File]

File = file:filename()

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

ls() -> ok

Lists files in the current directory.

ls(Dir) -> ok

Types:

Dir = file:name()

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

m() -> ok

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

m(Module) -> ok

Types:

Module = module()

Displays information about Module.

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

Types:

Type = atom()

Size = integer() >= 0

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

memory(Type) -> Size

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

Types:

Types = [Type]

Type = atom()

Size = integer() >= 0

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

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

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

Types:

File = file:name()

Options = [Option] | Option

Option = compile:option()

Module = module()

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])

nl(Module) -> abcast | error

Types:

Module = module()

Loads Module on all nodes.

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

Types:

X = Y = Z = integer() >= 0

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

pwd() -> ok

Prints the name of the working directory.

q() -> no_return()

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

regs() -> ok

nregs() -> ok

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(3erl)

YeccRet = -- see yecc:file/2

Generates an LALR-1 parser. Equivalent to:

yecc:file(File)

y(File, Options) -> YeccRet

Types:

File = name() -- see filename(3erl)

Options, YeccRet = -- see yecc:file/2

Generates an LALR-1 parser. Equivalent to:

yecc:file(File, Options)

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