Manage SIGTERM, SIGTSTP, SIGCONT signals

src/blc_command.cpp

@@ -116,7 +116,7 @@ void blc_command_remove(const char *command_name){
     }
     if (i==-1) EXIT_ON_ERROR("You try to remove a command '%s' that does not exist", command_name);
 
-    REMOVE_ITEM(&blc_commands, &blc_commands_nb, i);
+    REMOVE_ITEM_POSITION(&blc_commands, &blc_commands_nb, i);
 }
 
 void blc_command_interpret_string(char const *input_string, size_t size){

src/blc_program.cpp

@@ -408,10 +408,20 @@ void blc_program_args_display_help()
 }
 
 static void on_sigterm(int){
-    fprintf(stderr, "%s: receiving SIGTERM (kill)\n", blc_program_id);
+    fprintf(stderr, "%s: receiving SIGTERM\n", blc_program_id);
     exit(EXIT_SUCCESS);
 }
 
+static void on_sigtstp(int){
+    fprintf(stderr, "%s: receiving SIGTSTP: pause\n", blc_program_id);
+    blc_status=BLC_PAUSE;
+}
+
+static void on_sigcont(int){
+    fprintf(stderr, "%s: receiving SIGCONT: continue\n", blc_program_id);
+    blc_status=BLC_RUN;
+}
+
 static void on_sigint(int){
     if (blc_status==BLC_QUIT){
         fprintf(stderr, "%s: receiving SIGINT (Ctrl+C) in quiting mode. Force to quit.\n", blc_program_id);
@@ -424,7 +434,7 @@ static void on_sigint(int){
 }
 
 static void on_sigsegv(int){
-    fprintf(stderr, "%s: segmentation fault ( memory access error ! )\n", blc_program_id);
+    fprintf(stderr, "%s: receiving SIGSEGV segmentation fault ( memory access error )\n", blc_program_id);
     exit(EXIT_FAILURE);
 }
 
@@ -444,6 +454,12 @@ void blc_program_init(int *argc, char ***argv, void (*exit_cb)(void))
     action.sa_handler = on_sigterm;
     SYSTEM_SUCCESS_CHECK(sigaction(SIGTERM, &action, 0), 0, NULL);
     
+    action.sa_handler = on_sigtstp;
+    SYSTEM_SUCCESS_CHECK(sigaction(SIGTSTP, &action, 0), 0, NULL);
+    
+    action.sa_handler = on_sigcont;
+    SYSTEM_SUCCESS_CHECK(sigaction(SIGCONT, &action, 0), 0, NULL);
+    
     action.sa_handler = on_sigint;
     SYSTEM_SUCCESS_CHECK(sigaction(SIGINT, &action, 0), 0, NULL);