gpiounexport

Macros
#define	APP_EC_OK   0
	success exit code
#define	APP_EC_ARGS   2
	command-line options/arguments error exit code
#define	APP_EC_EXEC   4
	execution exit code

Functions
static int	strToInt (const string &str, int &val)
static void	mainInit (int argc, char *argv[])
	Main initialization. More...
int	main (int argc, char *argv[])
	Main. More...

Variables
static char *	Argv0
	the command
static int	ArgsGpio
	gpio number
static OptsPgmInfo_T	PgmInfo
	Program information. More...
static OptsInfo_T	OptsInfo []
	Command line options information. More...

Detailed Description

Function Documentation

int main	(	int	argc,
		char *	argv[]
	)

Main.

Parameters

argc	Command-line argument count.
argv	Command-line argument list.

Returns

Returns 0 on succes, non-zero on failure.

Definition at line 143 of file gpiounexport.cxx.

References APP_EC_EXEC, APP_EC_OK, ArgsGpio, gpioUnexport(), and mainInit().

{
  char  cmd[MAX_PATH]; 
  char  dir[MAX_PATH]; 
  
  mainInit(argc, argv);

  if( gpioUnexport(ArgsGpio) < 0 )
  {
    return APP_EC_EXEC;
  }

  return APP_EC_OK;
}

static void mainInit ( int  argc, char *  argv[]  )

static

Main initialization.

Parameters

argc	Command-line argument count.
argv	Command-line argument list.

Exits:

Program terminates on conversion error.

Definition at line 112 of file gpiounexport.cxx.

References APP_EC_ARGS, ArgsGpio, Argv0, OptsInfo, PgmInfo, and PkgInfo.

Referenced by main().

{
  // name of this process
  Argv0 = basename(argv[0]);

  // parse input options
  argv = OptsGet(Argv0, &PkgInfo, &PgmInfo, OptsInfo, true, &argc, argv);

  if( argc == 0 )
  {
    fprintf(stderr, "%s: No GPIO pin number <gpio> specified.\n", Argv0);
    fprintf(stderr, "Try '%s --help' for more information.\n", Argv0);
    exit(APP_EC_ARGS);
  }

  else if( strToInt(argv[0], ArgsGpio) < 0 )
  {
    fprintf(stderr, "%s: '%s': Bad GPIO number.\n", Argv0, argv[0]);
    fprintf(stderr, "Try '%s --help' for more information.\n", Argv0);
    exit(APP_EC_ARGS);
  }
}

Variable Documentation

OptsInfo_T OptsInfo[]

static

Initial value:

=
{
  {NULL, }
}

Command line options information.

Definition at line 84 of file gpiounexport.cxx.

Referenced by mainInit().

OptsPgmInfo_T PgmInfo

static

Initial value:

=
{
  
  "<gpio>",

  
  "Destroy GPIO exported interface.",

  
  "The %P command destroys a GPIO exported interface for the specified GPIO "
  "number.\n\n"
  "NOTE: This command requires root privileges.",

  
  NULL
}

Program information.

Definition at line 64 of file gpiounexport.cxx.

Referenced by mainInit().