It's important to reset the "CAL" status. This will be define later if necessary.

NEWS.adoc

@@ -49,6 +49,10 @@ https://github.com/networkupstools/nut/milestone/10
    * dstate machinery: a segmentation fault (null pointer dereference) was
      possible with `INSTCMD` processing of commands without parameters nor
      `TRACKING` identifier. [#2155]
+   * `upsmon` recognition of `CAL` state could linger after the calibration
+     activity was completed by the hardware, which led to mis-processing of
+     shutdown triggers. Also, notification was added to report "finished
+     calibration". [issue #2168, PR #2169]
 
  - nut-usbinfo.pl, nut-scanner and libnutscan:
    * USB VendorID:ProductID support list files generated by the script for

clients/upsmon.c

@@ -1211,7 +1211,7 @@ static void upsreplbatt(utype_t *ups)
 	}
 }
 
-static void ups_cal(utype_t *ups)
+static void ups_is_cal(utype_t *ups)
 {
 	if (flag_isset(ups->status, ST_CAL)) { 	/* no change */
 		upsdebugx(4, "%s: %s (no change)", __func__, ups->sys);
@@ -1226,6 +1226,16 @@ static void ups_cal(utype_t *ups)
 	setflag(&ups->status, ST_CAL);
 }
 
+static void ups_is_notcal(utype_t *ups)
+{
+	/* Called when CAL is NOT among known states */
+	if (flag_isset(ups->status, ST_CAL)) {	/* actual change */
+		do_notify(ups, NOTIFY_NOTCAL);
+		clearflag(&ups->status, ST_CAL);
+		try_restore_pollfreq(ups);
+	}
+}
+
 static void ups_fsd(utype_t *ups)
 {
 	if (flag_isset(ups->status, ST_FSD)) {		/* no change */
@@ -2130,6 +2140,10 @@ static void parse_status(utype_t *ups, char *status)
 		clearflag(&ups->status, ST_LOWBATT);
 	if (!strstr(status, "FSD"))
 		clearflag(&ups->status, ST_FSD);
+
+	/* similar to above - clear these flags and send notifications */
+	if (!strstr(status, "CAL"))
+		ups_is_notcal(ups);
 	if (!strstr(status, "OFF"))
 		ups_is_notoff(ups);
 	if (!strstr(status, "BYPASS"))
@@ -2154,7 +2168,7 @@ static void parse_status(utype_t *ups, char *status)
 		if (!strcasecmp(statword, "RB"))
 			upsreplbatt(ups);
 		if (!strcasecmp(statword, "CAL"))
-			ups_cal(ups);
+			ups_is_cal(ups);
 		if (!strcasecmp(statword, "OFF"))
 			ups_is_off(ups);
 		if (!strcasecmp(statword, "BYPASS"))

clients/upsmon.h

@@ -96,10 +96,11 @@ typedef struct {
 #define NOTIFY_NOCOMM	8	/* UPS hasn't been contacted in a while	*/
 #define NOTIFY_NOPARENT	9	/* privileged parent process died       */
 #define NOTIFY_CAL		10	/* UPS is performing calibration        */
-#define NOTIFY_OFF	11	/* UPS is administratively OFF or asleep*/
-#define NOTIFY_NOTOFF	12	/* UPS is not anymore administratively OFF or asleep*/
-#define NOTIFY_BYPASS	13	/* UPS is administratively on bypass    */
-#define NOTIFY_NOTBYPASS	14	/* UPS is not anymore administratively on bypass    */
+#define NOTIFY_NOTCAL		11	/* UPS is performing calibration        */
+#define NOTIFY_OFF	12	/* UPS is administratively OFF or asleep*/
+#define NOTIFY_NOTOFF	13	/* UPS is not anymore administratively OFF or asleep*/
+#define NOTIFY_BYPASS	14	/* UPS is administratively on bypass    */
+#define NOTIFY_NOTBYPASS	15	/* UPS is not anymore administratively on bypass    */
 
 /* notify flag values */
 
@@ -140,6 +141,7 @@ static struct {
 	{ NOTIFY_NOCOMM,   "NOCOMM",   NULL, "UPS %s is unavailable", NOTIFY_DEFAULT },
 	{ NOTIFY_NOPARENT, "NOPARENT", NULL, "upsmon parent process died - shutdown impossible", NOTIFY_DEFAULT },
 	{ NOTIFY_CAL,      "CAL",      NULL, "UPS %s: calibration in progress", NOTIFY_DEFAULT },
+	{ NOTIFY_NOTCAL,   "NOTCAL",   NULL, "UPS %s: calibration finished", NOTIFY_DEFAULT },
 	{ NOTIFY_OFF,      "OFF",      NULL, "UPS %s: administratively OFF or asleep", NOTIFY_DEFAULT },
 	{ NOTIFY_NOTOFF,   "NOTOFF",   NULL, "UPS %s: no longer administratively OFF or asleep", NOTIFY_DEFAULT },
 	{ NOTIFY_BYPASS,   "BYPASS",   NULL, "UPS %s: on bypass (powered, not protecting)", NOTIFY_DEFAULT },

conf/upsmon.conf.sample.in

@@ -314,6 +314,7 @@ POWERDOWNFLAG "@POWERDOWNFLAG@"
 # NOTIFYMSG NOCOMM	"UPS %s is unavailable"
 # NOTIFYMSG NOPARENT	"upsmon parent process died - shutdown impossible"
 # NOTIFYMSG CAL		"UPS %s: calibration in progress"
+# NOTIFYMSG NOTCAL	"UPS %s: calibration finished"
 # NOTIFYMSG OFF		"UPS %s: administratively OFF or asleep"
 # NOTIFYMSG NOTOFF	"UPS %s: no longer administratively OFF or asleep"
 # NOTIFYMSG BYPASS	"UPS %s: on bypass (powered, not protecting)"

docs/man/upsmon.conf.txt

@@ -242,6 +242,8 @@ NOPARENT;; `upsmon` parent process died - shutdown impossible
 
 CAL;; UPS calibration in progress
 
+NOTCAL;; UPS calibration finished
+
 OFF;; UPS administratively OFF or asleep
 
 NOTOFF;; UPS no longer administratively OFF or asleep

docs/nut.dict

@@ -1,4 +1,4 @@
-personal_ws-1.1 en 3282 utf-8
+personal_ws-1.1 en 3283 utf-8
 AAC
 AAS
 ABI
@@ -778,6 +778,7 @@ NONUT
 NOP
 NOPARENT
 NOTBYPASS
+NOTCAL
 NOTIFYCMD
 NOTIFYFLAG
 NOTIFYFLAGS