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return a value. Help entry points are void *, no return value is expected.
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return a value. Help entry points are void *, no return value is expected.
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They are typed as such (from cmds.h):
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They are typed as such (from cmds.h):
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/* Types for module command entry and help */
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/* Types for module command entry and help */
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typedef int * (* mod_entry_t)(char **);
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typedef int (* mod_entry_t)(char **);
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typedef void * (* mod_help_t)(unsigned int);
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typedef void (* mod_help_t)(unsigned int);
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/* Built-in commands need to be able to modify cliuser_t */
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/* Built-in commands need to be able to modify cliuser_t */
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typedef int * (* builtin_entry_t)(char **, cliuser_t *);
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typedef int (* builtin_entry_t)(char **, cliuser_t *);
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typedef void * (* builtin_help_t)(unsigned int);
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typedef void (* builtin_help_t)(unsigned int);
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As you can see, both modular and builtin commands expect an array of
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As you can see, both modular and builtin commands expect an array of
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arguments, however bulitins also expect to be pointed to cliuser_t.
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arguments, however bulitins also expect to be pointed to cliuser_t.
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Both are defined with the same simple structure:
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Both are defined with the same simple structure:
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1: Use mknewcmd to generate the skeletal files.
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1: Use mknewcmd to generate the skeletal files.
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2: Change your "usage()" command as shown:
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2: Change your "usage()" command as shown:
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     -- void usage(...)
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     -- void usage(...)
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     ++ void * help_cmd_foo(unsigned int level)
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     ++ void help_cmd_foo(unsigned int level)
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     -- return;
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     ++ retrn CMD_VOID;
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     'level' is either 0 or 1, indicating the level of help requested.
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     'level' is either 0 or 1, indicating the level of help requested.
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     If the help / usage function currently exits based on how it is
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     If the help / usage function currently exits based on how it is
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     called, you'll need to change it.
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     called, you'll need to change it.
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3: Change the programs "main()" as shown:
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3: Change the programs "main()" as shown:
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     -- int main(int argc, char **argv)
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     -- int main(int argc, char **argv)
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     ++ int * cmd_foo(char **argv)
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     ++ int cmd_foo(char **argv)
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     -- return 1;
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     -- return 1;
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     ++ return CMD_FAILURE;
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     ++ return CMD_FAILURE;
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     -- return 0;
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     -- return 0;
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     ++ return CMD_SUCCESS;
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     ++ return CMD_SUCCESS;
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     If main() returns an int that is not 1 or 0 (e.g. 127), cast it as
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     such:
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     -- return 127;
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     ++ return (int *) 127;
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     NOTE: _ONLY_ the main and help entry points need to return int * or
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     void *, respectively. Also take note that argc has changed. The type
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     for entry points may soon change.
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     NOTE: If main is void, you'll need to change it and ensure that its
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     NOTE: If main is void, you'll need to change it and ensure that its
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     expecting an array of arguments, even if they'll never be read or
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     expecting an array of arguments, even if they'll never be read or
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     used. I.e.:
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     used. I.e.:
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     -- void main(void)
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     -- void main(void)
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     ++ int * cmd_foo(char **argv)
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     ++ int cmd_foo(char **argv)
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     Similararly, do not try to return CMD_VOID within the modules main
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     entry point. If somehow you escape the compiler yelling at you, you
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     will surely see pretty blue and yellow fireworks once its reached.
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4: Don't expose more than the entry and help points:
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4: Don't expose more than the entry and help points:
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     -- void my_function(int n)
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     -- void my_function(int n)
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     ++ static void my_function(int n)
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     ++ static void my_function(int n)
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