Merge pull request #7 from varzac/gpio-status

Add functionality for status sub command

Author: posborne

src/commands/gpio_status.rs

@@ -0,0 +1,90 @@
+use options::GpioStatusOptions;
+use config::GpioConfig;
+use config::PinConfig;
+use sysfs_gpio::Direction;
+use std::process::exit;
+
+pub fn main(config: &GpioConfig, opts: &GpioStatusOptions) {
+    match opts.pin {
+        Some(ref pin_name) => {
+            let pin_config = match config.get_pin(&pin_name[..]) {
+                Some(pin) => pin,
+                None => {
+                    println!("Unable to find config entry for pin '{}'", pin_name);
+                    exit(1)
+                }
+            };
+            print_pin_header();
+            print_pin_row(&pin_config, true);
+        },
+        None => {
+            print_pin_header();
+            for (pos, pin) in config.get_pins().iter().enumerate() {
+                print_pin_row(pin, pos == (config.get_pins().len() - 1));
+            }
+        }
+    }
+}
+
+
+fn print_pin_header(){
+    println!("| {:<10} | {:<10} | {:<10} | {:<10} | {:<10} | {:<10} |", 
+             "Number", 
+             "Exported", 
+             "Direction",  
+             "Active Low", 
+             "Names", 
+             "Value");
+    print_row_sep(false);
+}
+
+fn print_row_sep(is_last: bool){
+    let col_sep = if is_last {"-"} else {"+"};
+    println!("{}{:->13}{:->13}{:->13}{:->13}{:->13}{:->13}", 
+             col_sep,
+             col_sep,
+             col_sep,
+             col_sep,
+             col_sep,
+             col_sep,
+             col_sep);
+}
+
+fn print_pin_row(pin_config: &PinConfig, is_last: bool){
+    let direction = match pin_config.direction {
+        Direction::In => "In",
+        Direction::Out => "Out",
+        Direction::High => "High",
+        Direction::Low => "Low",
+    };
+
+    let value = match pin_config.get_pin().get_value() {
+        Ok(value) => value,
+        Err(e) => {
+            println!("ERROR: {:?}", e);
+            exit(1);
+        },
+    };
+
+    for (pos, name) in pin_config.names.iter().enumerate() {
+        if pos == 0 {
+            println!("| {:<10} | {:<10} | {:<10} | {:<10} | {:<10} | {:<10} |", 
+                     pin_config.num, 
+                     pin_config.export, 
+                     direction, 
+                     pin_config.active_low, 
+                     name, 
+                     value);
+        } else {
+            println!("| {:<10} | {:<10} | {:<10} | {:<10} | {:<10} | {:<10} |", 
+                     "", 
+                     "", 
+                     "", 
+                     "", 
+                     name, 
+                     "");
+
+        }
+    }
+    print_row_sep(is_last);
+}

src/commands/mod.rs

@@ -7,3 +7,4 @@ pub mod gpio_write;
 pub mod gpio_unexport;
 pub mod gpio_unexportall;
 pub mod gpio_poll;
+pub mod gpio_status;

src/main.rs

@@ -218,7 +218,13 @@ fn main() {
             };
             gpio_unexportall::main(&cfg, &unexportall_options);
         }
-        ("status", Some(_)) => {}
+        ("status", Some(m)) => {
+            let status_options = GpioStatusOptions {
+                gpio_opts: gpio_options,
+                pin: m.value_of("pin").map(|pin| String::from(pin)),
+            };
+            gpio_status::main(&cfg, &status_options);
+        }
         _ => {}
     }
 }