Save recording status to file to reload it when gsr overlay restarts

src/Process.cpp

@@ -58,17 +58,9 @@ namespace gsr {
         }
     }
 
-    static bool is_number(const char *str) {
-        while(*str) {
-            char c = *str;
-            if(c < '0' || c > '9')
-                return false;
-            ++str;
-        }
-        return true;
-    }
+    bool read_cmdline_arg0(const char *filepath, char *output_buffer) {
+        output_buffer[0] = '\0';
 
-    static bool read_cmdline(const char *filepath, char *output_buffer) {
         const char *arg0_end = NULL;
         int fd = open(filepath, O_RDONLY);
         if(fd == -1)
@@ -92,41 +84,4 @@ namespace gsr {
         close(fd);
         return false;
     }
-
-    static pid_t pidof(const char *process_name) {
-        pid_t result = -1;
-        DIR *dir = opendir("/proc");
-        if(!dir)
-            return -1;
-
-        char cmdline_filepath[PATH_MAX];
-        char arg0[PATH_MAX];
-
-        struct dirent *entry;
-        while((entry = readdir(dir)) != NULL) {
-            if(!is_number(entry->d_name))
-                continue;
-
-            snprintf(cmdline_filepath, sizeof(cmdline_filepath), "/proc/%s/cmdline", entry->d_name);
-            if(read_cmdline(cmdline_filepath, arg0) && strcmp(process_name, arg0) == 0) {
-                result = atoi(entry->d_name);
-                break;
-            }
-        }
-
-        closedir(dir);
-        return result;
-    }
-
-    bool is_gpu_screen_recorder_running(pid_t &gsr_pid, GsrMode &mode) {
-        // TODO: Set |mode| by checking cmdline
-        gsr_pid = pidof("gpu-screen-recorder");
-        if(gsr_pid == -1) {
-            mode = GsrMode::Unknown;
-            return false;
-        } else {
-            mode = GsrMode::Record;
-            return true;
-        }
-    }
 }