Add dap_process_manager

core/dap_process_manager.c

+#ifdef __linux__
+#include <stdio.h>
+#include <sys/types.h>
+#include <signal.h>
+
+#include "dap_process_manager.h"
+#include "dap_common.h"
+
+#undef LOG_TAG
+#define LOG_TAG "dap_process_manager"
+
+bool is_process_running(pid_t pid) {
+    return kill(pid, 0) == 0;
+}
+
+bool save_process_pid_in_file(const char* file_path) {
+    FILE * fpid = fopen(file_path, "w");
+    if (fpid == NULL) {
+        log_it(L_ERROR, "Cant create/open file by path %s",file_path);
+        return false;
+    }
+    fprintf(fpid, "%d", getpid());
+    fclose(fpid);
+    return true;
+}
+
+pid_t get_pid_from_file(const char* file_path) {
+    FILE * fpid = fopen(file_path, "r");
+    if (fpid == NULL) {
+        log_it(L_ERROR, "Cant create/open file by path %s",file_path);
+        return false;
+    }
+
+    pid_t f_pid = 0;
+    fscanf(fpid, "%d", &f_pid);
+    fclose(fpid);
+
+    return f_pid;
+}
+
+bool daemonize_process() {
+    return daemon(1,1) == 0;
+}
+
+bool kill_process(pid_t pid) {
+    if (!is_process_running(pid)) {
+        return false;
+    }
+    return kill(pid, SIGKILL) == 0;
+}
+
+#endif

core/dap_process_manager.h

+#ifdef __linux__
+
+#include <stdbool.h>
+#include <unistd.h>
+
+/* Saves process pid into file by file_path.
+ * If file exists he will be overwritten */
+extern bool save_process_pid_in_file(const char* file_path);
+
+/* File must consist only PID. Return 0 if file is clear. */
+extern pid_t get_pid_from_file(const char* file_path);
+
+/* Return true if process running */
+extern bool is_process_running(pid_t pid);
+
+/* Demonizes current process and exit from program */
+extern bool daemonize_process(void);
+
+/* Sends SIGKILL to process */
+extern bool kill_process(pid_t pid);
+
+#endif