update C snipplets

code/C/System/get-pid-by-process-name.c

@@ -0,0 +1,12 @@
+pid_t getPIDbyName(char *ps_name) {
+  FILE *fp;
+  char *cmd = (char *)calloc(1, 200);
+
+  sprintf(cmd, "pidof %s", ps_name);
+
+  fp = popen(cmd, "r");
+  fread(cmd, 1, 200, fp);
+  fclose(fp);
+
+  return atoi(cmd);
+}