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-rw-r--r--src/common/cfgfiles.c10
-rw-r--r--src/common/cfgfiles.h5
2 files changed, 15 insertions, 0 deletions
diff --git a/src/common/cfgfiles.c b/src/common/cfgfiles.c
index 4bf2f470..910e0781 100644
--- a/src/common/cfgfiles.c
+++ b/src/common/cfgfiles.c
@@ -1046,6 +1046,11 @@ save_config (void)
 				return 0;
 			}
 		}
+
+		if (vars[i].after_update != NULL)
+		{
+			vars[i].after_update();
+		}
 		i++;
 	}
 	while (vars[i].name);
@@ -1293,6 +1298,11 @@ cmd_set (struct session *sess, char *tbuf, char *word[], char *word_eol[])
 				{
 					set_showval (sess, &vars[i], tbuf);
 				}
+
+				if (vars[i].after_update != NULL)
+				{
+					vars[i].after_update();
+				}
 				break;
 			}
 		}
diff --git a/src/common/cfgfiles.h b/src/common/cfgfiles.h
index b421884a..b0d57519 100644
--- a/src/common/cfgfiles.h
+++ b/src/common/cfgfiles.h
@@ -71,6 +71,11 @@ struct prefs
 	unsigned short offset;
 	unsigned short len;
 	unsigned short type;
+	/*
+	 * an optional function which will be called after the preference value has
+	 * been updated.
+	 */
+	void (*after_update)(void);
 };
 
 #define TYPE_STR 0