Add status command

.gitignore

@@ -1,2 +1,6 @@
 # C++ generated headers
 *.gch
+
+# IDE-specific
+.idea
+.vscode

comfortable-swipe.cpp

@@ -54,6 +54,9 @@ int main(int argc, char** args)
         else if (arg == "debug")
             comfortable_swipe::service::debug();
 
+        else if (arg == "status")
+            comfortable_swipe::service::status();
+
         else /* if (arg == "help") */
             comfortable_swipe::service::help();
     }

lib/comfortable_swipe

@@ -34,6 +34,7 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #include "service/help.cpp"
 #include "service/restart.cpp"
 #include "service/start.cpp"
+#include "service/status.cpp"
 #include "service/stop.cpp"
 #include "util/autostart_filename.cpp"
 #include "util/conf_filename.cpp"

lib/index.hpp

@@ -54,6 +54,7 @@ extern "C"
             void help();
             void restart();
             void start();
+            void status();
             void stop();
         }
     }

lib/service/help.cpp

@@ -39,6 +39,7 @@ namespace comfortable_swipe::service
         std::puts("buffer     - parses output of libinput debug-events");
         std::puts("help       - shows the help dialog");
         std::puts("debug      - logs raw output from input events taken from libinput");
+        std::puts("status     - checks status of program and autostart");
         std::puts("");
         std::printf("Configuration file can be found in %s\n", conf_filename());
     }

lib/service/status.cpp

@@ -0,0 +1,58 @@
+#ifndef __COMFORTABLE_SWIPE__service_status__
+#define __COMFORTABLE_SWIPE__service_status__
+
+/*
+Comfortable Swipe
+by Rico Tiongson
+
+This program is free software: you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation, either version 3 of the License, or
+(at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#include "../index.hpp"
+#include <stdexcept> // std::runtime_error
+#include <unistd.h> // popen, pclose, getpid, access, F_OK
+#include <memory> // std::unique_ptr
+#include <array> // std::array
+#include <cstdlib> // std::atoi
+#include <cstdio> // FILE, std::feof, std::fgets, std::printf
+
+namespace comfortable_swipe::service
+{
+    /**
+     * Restarts the comfortable-swipe service.
+     */
+    void status()
+    {
+        // check if comfortable-swipe is running
+        bool running = false;
+        std::array<char, 128> buffer;
+        std::unique_ptr<FILE, decltype(&pclose)> pipe(popen("pgrep -f comfortable-swipe", "r"), pclose);
+        if (pipe && !std::feof(pipe.get()) && std::fgets(buffer.data(), buffer.size(), pipe.get()) != NULL)
+        {
+            int pid = std::atoi(buffer.data());
+            if (pid != getpid())
+                running = true;
+        }
+
+        // check if autostart is on
+        auto autostart_f = comfortable_swipe::util::autostart_filename();
+        bool autostart_on = access(autostart_f, F_OK) != -1;
+
+        // print status
+        std::printf("program is %s\n", running ? "ON" : "OFF");
+        std::printf("autostart is %s\n", autostart_on ? "ON" : "OFF");
+    }
+}
+
+#endif /* __COMFORTABLE_SWIPE__service_restart__ */

lib/service/stop.cpp

@@ -26,6 +26,7 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #include <unistd.h> // popen, pclose, getpid
 #include <memory> // std::unique_ptr
 #include <array> // std::array
+#include <cstdlib> // std::atoi
 #include <cstdio> // FILE, std::feof, std::fgets
 
 namespace comfortable_swipe::service