1c(3)                       Erlang Module Definition                       c(3)
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3
4

NAME

6       c - Command interface module.
7

DESCRIPTION

9       This module enables users to enter the short form of some commonly used
10       commands.
11
12   Note:
13       These functions are intended for interactive use in  the  Erlang  shell
14       only. The module prefix can be omitted.
15
16

EXPORTS

18       bt(Pid) -> ok | undefined
19
20              Types:
21
22                 Pid = pid()
23
24              Stack backtrace for a process. Equivalent to erlang:process_dis‐
25              play(Pid, backtrace).
26
27       c(Module) -> {ok, ModuleName} | error
28
29       c(Module, Options) -> {ok, ModuleName} | error
30
31       c(Module, Options, Filter) -> {ok, ModuleName} | error
32
33              Types:
34
35                 Module = atom()
36                 Options = [compile:option()]
37                 Filter = fun((compile:option()) -> boolean())
38                 ModuleName = module()
39
40              Compiles and then purges and loads the code for a module. Module
41              can be either a module name or a source file path, with or with‐
42              out .erl extension. Options defaults to [].
43
44              If Module is an atom and is not the path of a source file,  then
45              the code path is searched to locate the object file for the mod‐
46              ule and extract its original compiler options and  source  path.
47              If  the  source  file  is  not  found  in the original location,
48              filelib:find_source/1 is used to search for it relative  to  the
49              directory of the object file.
50
51              The  source  file  is  compiled  with  the  the original options
52              appended to the given Options,  the  output  replacing  the  old
53              object file if and only if compilation succeeds. A function Fil‐
54              ter can be specified for removing elements from from the  origi‐
55              nal compiler options before the new options are added.
56
57              Notice  that purging the code means that any processes lingering
58              in old code for the module are killed without warning. For  more
59              information, see code/3.
60
61       cd(Dir) -> ok
62
63              Types:
64
65                 Dir = file:name()
66
67              Changes  working directory to Dir, which can be a relative name,
68              and then prints the name of the new working directory.
69
70              Example:
71
72              2> cd("../erlang").
73              /home/ron/erlang
74
75       erlangrc(PathList) -> {ok, file:filename()} | {error, term()}
76
77              Types:
78
79                 PathList = [Dir :: file:name()]
80
81              Search PathList and load .erlang resource file if found.
82
83       flush() -> ok
84
85              Flushes any messages sent to the shell.
86
87       help() -> ok
88
89              Displays help information: all valid  shell  internal  commands,
90              and commands in this module.
91
92       i() -> ok
93
94       ni() -> ok
95
96              i/0  displays  system information, listing information about all
97              processes. ni/0 does the same, but for all nodes the network.
98
99       i(X, Y, Z) -> [{atom(), term()}]
100
101              Types:
102
103                 X = Y = Z = integer() >= 0
104
105              Displays   information   about   a   process,   Equivalent    to
106              process_info(pid(X, Y, Z)), but location transparent.
107
108       l(Module) -> code:load_ret()
109
110              Types:
111
112                 Module = module()
113
114              Purges   and   loads,   or   reloads,   a   module   by  calling
115              code:purge(Module) followed by code:load_file(Module).
116
117              Notice that purging the code means that any processes  lingering
118              in  old code for the module are killed without warning. For more
119              information, see code/3.
120
121       lc(Files) -> ok
122
123              Types:
124
125                 Files = [File]
126                 File
127
128              Compiles  a  list  of  files   by   calling   compile:file(File,
129              [report_errors, report_warnings]) for each File in Files.
130
131              For information about File, see file:filename().
132
133       lm() -> [code:load_ret()]
134
135              Reloads  all  currently loaded modules that have changed on disk
136              (see mm()). Returns the list of results from  calling  l(M)  for
137              each such M.
138
139       ls() -> ok
140
141              Lists files in the current directory.
142
143       ls(Dir) -> ok
144
145              Types:
146
147                 Dir = file:name()
148
149              Lists  files  in  directory Dir or, if Dir is a file, only lists
150              it.
151
152       m() -> ok
153
154              Displays information about the  loaded  modules,  including  the
155              files from which they have been loaded.
156
157       m(Module) -> ok
158
159              Types:
160
161                 Module = module()
162
163              Displays information about Module.
164
165       mm() -> [module()]
166
167              Lists  all  modified  modules.  Shorthand for code:modified_mod‐
168              ules/0.
169
170       memory() -> [{Type, Size}]
171
172              Types:
173
174                 Type = atom()
175                 Size = integer() >= 0
176
177              Memory allocation information. Equivalent to erlang:memory/0.
178
179       memory(Type) -> Size
180
181       memory(Types) -> [{Type, Size}]
182
183              Types:
184
185                 Types = [Type]
186                 Type = atom()
187                 Size = integer() >= 0
188
189              Memory allocation information. Equivalent to erlang:memory/1.
190
191       nc(File) -> {ok, Module} | error
192
193       nc(File, Options) -> {ok, Module} | error
194
195              Types:
196
197                 File = file:name()
198                 Options = [Option] | Option
199                 Option = compile:option()
200                 Module = module()
201
202              Compiles and then loads the  code  for  a  file  on  all  nodes.
203              Options defaults to []. Compilation is equivalent to:
204
205              compile:file(File, Options ++ [report_errors, report_warnings])
206
207       nl(Module) -> abcast | error
208
209              Types:
210
211                 Module = module()
212
213              Loads Module on all nodes.
214
215       pid(X, Y, Z) -> pid()
216
217              Types:
218
219                 X = Y = Z = integer() >= 0
220
221              Converts  X,  Y,  Z  to pid <X.Y.Z>. This function is only to be
222              used when debugging.
223
224       pwd() -> ok
225
226              Prints the name of the working directory.
227
228       q() -> no_return()
229
230              This function is shorthand for init:stop(), that is,  it  causes
231              the node to stop in a controlled fashion.
232
233       regs() -> ok
234
235       nregs() -> ok
236
237              regs/0  displays  information  about  all  registered processes.
238              nregs/0 does the same, but for all nodes in the network.
239
240       uptime() -> ok
241
242              Prints  the  node  uptime  (as   specified   by   erlang:statis‐
243              tics(wall_clock)) in human-readable form.
244
245       xm(ModSpec) -> void()
246
247              Types:
248
249                 ModSpec = Module | Filename
250                  Module = atom()
251                  Filename = string()
252
253              Finds undefined functions, unused functions, and calls to depre‐
254              cated functions in a module by calling xref:m/1.
255
256       y(File) -> YeccRet
257
258              Types:
259
260                 File = name()
261                 YeccRet
262
263              Generates an LALR-1 parser. Equivalent to:
264
265              yecc:file(File)
266
267              For information about File = name(), see filename(3). For infor‐
268              mation about YeccRet, see yecc:file/2.
269
270       y(File, Options) -> YeccRet
271
272              Types:
273
274                 File = name()
275                 Options, YeccRet
276
277              Generates an LALR-1 parser. Equivalent to:
278
279              yecc:file(File, Options)
280
281              For information about File = name(), see filename(3). For infor‐
282              mation about Options and YeccRet, see yecc:file/2.
283

SEE ALSO

285       filename(3), compile(3), erlang(3), yecc(3), xref(3)
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289Ericsson AB                      stdlib 3.12.1                            c(3)