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envstat.c revision 1.84
      1 /* $NetBSD: envstat.c,v 1.84 2010/12/14 08:04:14 pooka Exp $ */
      2 
      3 /*-
      4  * Copyright (c) 2007, 2008 Juan Romero Pardines.
      5  * All rights reserved.
      6  *
      7  * Redistribution and use in source and binary forms, with or without
      8  * modification, are permitted provided that the following conditions
      9  * are met:
     10  * 1. Redistributions of source code must retain the above copyright
     11  *    notice, this list of conditions and the following disclaimer.
     12  * 2. Redistributions in binary form must reproduce the above copyright
     13  *    notice, this list of conditions and the following disclaimer in the
     14  *    documentation and/or other materials provided with the distribution.
     15  *
     16  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
     17  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
     18  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
     19  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
     20  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
     21  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     22  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     23  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     24  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
     25  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     26  */
     27 
     28 #include <sys/cdefs.h>
     29 #ifndef lint
     30 __RCSID("$NetBSD: envstat.c,v 1.84 2010/12/14 08:04:14 pooka Exp $");
     31 #endif /* not lint */
     32 
     33 #include <stdio.h>
     34 #include <stdlib.h>
     35 #include <stdbool.h>
     36 #include <stdarg.h>
     37 #include <string.h>
     38 #include <unistd.h>
     39 #include <fcntl.h>
     40 #include <err.h>
     41 #include <errno.h>
     42 #include <paths.h>
     43 #include <syslog.h>
     44 #include <sys/envsys.h>
     45 #include <sys/ioctl.h>
     46 #include <sys/types.h>
     47 #include <sys/queue.h>
     48 #include <prop/proplib.h>
     49 
     50 #include "envstat.h"
     51 #include "prog_ops.h"
     52 
     53 #define ENVSYS_DFLAG	0x00000001	/* list registered devices */
     54 #define ENVSYS_FFLAG	0x00000002	/* show temp in farenheit */
     55 #define ENVSYS_LFLAG	0x00000004	/* list sensors */
     56 #define ENVSYS_XFLAG	0x00000008	/* externalize dictionary */
     57 #define ENVSYS_IFLAG 	0x00000010	/* skip invalid sensors */
     58 #define ENVSYS_SFLAG	0x00000020	/* remove all properties set */
     59 #define ENVSYS_TFLAG	0x00000040	/* make statistics */
     60 #define ENVSYS_KFLAG	0x00000100	/* show temp in kelvin */
     61 
     62 /* Sensors */
     63 typedef struct envsys_sensor {
     64 	SIMPLEQ_ENTRY(envsys_sensor) entries;
     65 	int32_t	cur_value;
     66 	int32_t	max_value;
     67 	int32_t	min_value;
     68 	int32_t	avg_value;
     69 	int32_t	critmin_value;
     70 	int32_t	critmax_value;
     71 	int32_t	warnmin_value;
     72 	int32_t	warnmax_value;
     73 	char	desc[ENVSYS_DESCLEN];
     74 	char	type[ENVSYS_DESCLEN];
     75 	char	drvstate[ENVSYS_DESCLEN];
     76 	char	battcap[ENVSYS_DESCLEN];
     77 	char 	dvname[ENVSYS_DESCLEN];
     78 	bool	invalid;
     79 	bool	visible;
     80 	bool	percentage;
     81 } *sensor_t;
     82 
     83 /* Sensor statistics */
     84 typedef struct envsys_sensor_stats {
     85 	SIMPLEQ_ENTRY(envsys_sensor_stats) entries;
     86 	int32_t	max;
     87 	int32_t	min;
     88 	int32_t avg;
     89 	char	desc[ENVSYS_DESCLEN];
     90 } *sensor_stats_t;
     91 
     92 /* Device properties */
     93 typedef struct envsys_dvprops {
     94 	uint64_t	refresh_timo;
     95 	/* more members could be added in the future */
     96 } *dvprops_t;
     97 
     98 /* A simple queue to manage all sensors */
     99 static SIMPLEQ_HEAD(, envsys_sensor) sensors_list =
    100     SIMPLEQ_HEAD_INITIALIZER(sensors_list);
    101 
    102 /* A simple queue to manage statistics for all sensors */
    103 static SIMPLEQ_HEAD(, envsys_sensor_stats) sensor_stats_list =
    104     SIMPLEQ_HEAD_INITIALIZER(sensor_stats_list);
    105 
    106 static unsigned int 	interval, flags, width;
    107 static char 		*mydevname, *sensors;
    108 static bool 		statistics;
    109 static u_int		header_passes;
    110 
    111 static int 		parse_dictionary(int);
    112 static int 		send_dictionary(FILE *);
    113 static int 		find_sensors(prop_array_t, const char *, dvprops_t);
    114 static void 		print_sensors(void);
    115 static int 		check_sensors(char *);
    116 static int 		usage(void);
    117 
    118 static int		sysmonfd; /* fd of /dev/sysmon */
    119 
    120 int main(int argc, char **argv)
    121 {
    122 	prop_dictionary_t dict;
    123 	int c, rval = 0;
    124 	char *endptr, *configfile = NULL;
    125 	FILE *cf;
    126 
    127 	if (prog_init && prog_init() == -1)
    128 		err(1, "init failed");
    129 
    130 	setprogname(argv[0]);
    131 
    132 	while ((c = getopt(argc, argv, "c:Dd:fIi:klrSs:Tw:Wx")) != -1) {
    133 		switch (c) {
    134 		case 'c':	/* configuration file */
    135 			configfile = strdup(optarg);
    136 			if (configfile == NULL)
    137 				err(EXIT_FAILURE, "strdup");
    138 			break;
    139 		case 'D':	/* list registered devices */
    140 			flags |= ENVSYS_DFLAG;
    141 			break;
    142 		case 'd':	/* show sensors of a specific device */
    143 			mydevname = strdup(optarg);
    144 			if (mydevname == NULL)
    145 				err(EXIT_FAILURE, "strdup");
    146 			break;
    147 		case 'f':	/* display temperature in Farenheit */
    148 			flags |= ENVSYS_FFLAG;
    149 			break;
    150 		case 'I':	/* Skips invalid sensors */
    151 			flags |= ENVSYS_IFLAG;
    152 			break;
    153 		case 'i':	/* wait time between intervals */
    154 			interval = (unsigned int)strtoul(optarg, &endptr, 10);
    155 			if (*endptr != '\0')
    156 				errx(EXIT_FAILURE, "bad interval '%s'", optarg);
    157 			break;
    158 		case 'k':	/* display temperature in Kelvin */
    159 			flags |= ENVSYS_KFLAG;
    160 			break;
    161 		case 'l':	/* list sensors */
    162 			flags |= ENVSYS_LFLAG;
    163 			break;
    164 		case 'r':
    165 			/*
    166 			 * This flag is noop.. it's only here for
    167 			 * compatibility with the old implementation.
    168 			 */
    169 			break;
    170 		case 'S':
    171 			flags |= ENVSYS_SFLAG;
    172 			break;
    173 		case 's':	/* only show specified sensors */
    174 			sensors = strdup(optarg);
    175 			if (sensors == NULL)
    176 				err(EXIT_FAILURE, "strdup");
    177 			break;
    178 		case 'T':	/* make statistics */
    179 			flags |= ENVSYS_TFLAG;
    180 			break;
    181 		case 'w':	/* width value for the lines */
    182 			width = (unsigned int)strtoul(optarg, &endptr, 10);
    183 			if (*endptr != '\0')
    184 				errx(EXIT_FAILURE, "bad width '%s'", optarg);
    185 			break;
    186 		case 'x':	/* print the dictionary in raw format */
    187 			flags |= ENVSYS_XFLAG;
    188 			break;
    189 		case 'W':	/* No longer used, retained for campatability */
    190 			break;
    191 		case '?':
    192 		default:
    193 			usage();
    194 			/* NOTREACHED */
    195 		}
    196 	}
    197 
    198 	argc -= optind;
    199 	argv += optind;
    200 
    201 	if (argc > 0)
    202 		usage();
    203 
    204 	/* Check if we want to make statistics */
    205 	if (flags & ENVSYS_TFLAG) {
    206 		if (!interval)
    207 			errx(EXIT_FAILURE,
    208 		    	    "-T cannot be used without an interval (-i)");
    209 		else
    210 			statistics = true;
    211 	}
    212 
    213 	if (mydevname && sensors)
    214 		errx(EXIT_FAILURE, "-d flag cannot be used with -s");
    215 
    216 	/* Open the device in ro mode */
    217 	if ((sysmonfd = prog_open(_PATH_SYSMON, O_RDONLY)) == -1)
    218 		err(EXIT_FAILURE, "%s", _PATH_SYSMON);
    219 
    220 	/* Print dictionary in raw mode */
    221 	if (flags & ENVSYS_XFLAG) {
    222 		rval = prop_dictionary_recv_ioctl(sysmonfd,
    223 						  ENVSYS_GETDICTIONARY,
    224 						  &dict);
    225 		if (rval)
    226 			errx(EXIT_FAILURE, "%s", strerror(rval));
    227 
    228 		config_dict_dump(dict);
    229 
    230 	/* Remove all properties set in dictionary */
    231 	} else if (flags & ENVSYS_SFLAG) {
    232 		/* Close the ro descriptor */
    233 		(void)prog_close(sysmonfd);
    234 
    235 		/* open the fd in rw mode */
    236 		if ((sysmonfd = prog_open(_PATH_SYSMON, O_RDWR)) == -1)
    237 			err(EXIT_FAILURE, "%s", _PATH_SYSMON);
    238 
    239 		dict = prop_dictionary_create();
    240 		if (!dict)
    241 			err(EXIT_FAILURE, "prop_dictionary_create");
    242 
    243 		rval = prop_dictionary_set_bool(dict,
    244 						"envsys-remove-props",
    245 					        true);
    246 		if (!rval)
    247 			err(EXIT_FAILURE, "prop_dict_set_bool");
    248 
    249 		/* send the dictionary to the kernel now */
    250 		rval = prop_dictionary_send_ioctl(dict, sysmonfd,
    251 		    ENVSYS_REMOVEPROPS);
    252 		if (rval)
    253 			warnx("%s", strerror(rval));
    254 
    255 	/* Set properties in dictionary */
    256 	} else if (configfile) {
    257 		/*
    258 		 * Parse the configuration file.
    259 		 */
    260 		if ((cf = fopen(configfile, "r")) == NULL) {
    261 			syslog(LOG_ERR, "fopen failed: %s", strerror(errno));
    262 			errx(EXIT_FAILURE, "%s", strerror(errno));
    263 		}
    264 
    265 		rval = send_dictionary(cf);
    266 		(void)fclose(cf);
    267 
    268 	/* Show sensors with interval */
    269 	} else if (interval) {
    270 		for (;;) {
    271 			rval = parse_dictionary(sysmonfd);
    272 			if (rval)
    273 				break;
    274 
    275 			(void)fflush(stdout);
    276 			(void)sleep(interval);
    277 		}
    278 	/* Show sensors without interval */
    279 	} else {
    280 		rval = parse_dictionary(sysmonfd);
    281 	}
    282 
    283 	if (sensors)
    284 		free(sensors);
    285 	if (mydevname)
    286 		free(mydevname);
    287 	(void)prog_close(sysmonfd);
    288 
    289 	return rval ? EXIT_FAILURE : EXIT_SUCCESS;
    290 }
    291 
    292 static int
    293 send_dictionary(FILE *cf)
    294 {
    295 	prop_dictionary_t kdict, udict;
    296 	int error = 0;
    297 
    298 	/* Retrieve dictionary from kernel */
    299 	error = prop_dictionary_recv_ioctl(sysmonfd,
    300 	    ENVSYS_GETDICTIONARY, &kdict);
    301       	if (error)
    302 		return error;
    303 
    304 	config_parse(cf, kdict);
    305 
    306 	/*
    307 	 * Dictionary built by the parser from the configuration file.
    308 	 */
    309 	udict = config_dict_parsed();
    310 
    311 	/*
    312 	 * Close the read only descriptor and open a new one read write.
    313 	 */
    314 	(void)prog_close(sysmonfd);
    315 	if ((sysmonfd = prog_open(_PATH_SYSMON, O_RDWR)) == -1) {
    316 		error = errno;
    317 		warn("%s", _PATH_SYSMON);
    318 		return error;
    319 	}
    320 
    321 	/*
    322 	 * Send our sensor properties dictionary to the kernel then.
    323 	 */
    324 	error = prop_dictionary_send_ioctl(udict,
    325 	    sysmonfd, ENVSYS_SETDICTIONARY);
    326 	if (error)
    327 		warnx("%s", strerror(error));
    328 
    329 	prop_object_release(udict);
    330 	return error;
    331 }
    332 
    333 static sensor_stats_t
    334 find_stats_sensor(const char *desc)
    335 {
    336 	sensor_stats_t stats;
    337 
    338 	/*
    339 	 * If we matched a sensor by its description return it, otherwise
    340 	 * allocate a new one.
    341 	 */
    342 	SIMPLEQ_FOREACH(stats, &sensor_stats_list, entries)
    343 		if (strcmp(stats->desc, desc) == 0)
    344 			return stats;
    345 
    346 	stats = calloc(1, sizeof(*stats));
    347 	if (stats == NULL)
    348 		return NULL;
    349 
    350 	(void)strlcpy(stats->desc, desc, sizeof(stats->desc));
    351 	SIMPLEQ_INSERT_TAIL(&sensor_stats_list, stats, entries);
    352 
    353 	return stats;
    354 }
    355 
    356 static int
    357 parse_dictionary(int fd)
    358 {
    359 	sensor_t sensor = NULL;
    360 	dvprops_t edp = NULL;
    361 	prop_array_t array;
    362 	prop_dictionary_t dict;
    363 	prop_object_iterator_t iter;
    364 	prop_object_t obj;
    365 	const char *dnp = NULL;
    366 	int rval = 0;
    367 
    368 	/* receive dictionary from kernel */
    369 	rval = prop_dictionary_recv_ioctl(fd, ENVSYS_GETDICTIONARY, &dict);
    370 	if (rval)
    371 		return rval;
    372 
    373 	/* No drivers registered? */
    374 	if (prop_dictionary_count(dict) == 0) {
    375 		warnx("no drivers registered");
    376 		goto out;
    377 	}
    378 
    379 	if (mydevname) {
    380 		/* -d flag specified, print sensors only for this device */
    381 		obj = prop_dictionary_get(dict, mydevname);
    382 		if (prop_object_type(obj) != PROP_TYPE_ARRAY) {
    383 			warnx("unknown device `%s'", mydevname);
    384 			rval = EINVAL;
    385 			goto out;
    386 		}
    387 
    388 		rval = find_sensors(obj, mydevname, NULL);
    389 		if (rval)
    390 			goto out;
    391 
    392 	} else {
    393 		/* print sensors for all devices registered */
    394 		iter = prop_dictionary_iterator(dict);
    395 		if (iter == NULL) {
    396 			rval = EINVAL;
    397 			goto out;
    398 		}
    399 
    400 		/* iterate over the dictionary returned by the kernel */
    401 		while ((obj = prop_object_iterator_next(iter)) != NULL) {
    402 			array = prop_dictionary_get_keysym(dict, obj);
    403 			if (prop_object_type(array) != PROP_TYPE_ARRAY) {
    404 				warnx("no sensors found");
    405 				rval = EINVAL;
    406 				goto out;
    407 			}
    408 
    409 			edp = calloc(1, sizeof(*edp));
    410 			if (!edp) {
    411 				rval = ENOMEM;
    412 				goto out;
    413 			}
    414 
    415 			dnp = prop_dictionary_keysym_cstring_nocopy(obj);
    416 			rval = find_sensors(array, dnp, edp);
    417 			if (rval)
    418 				goto out;
    419 
    420 			if (((flags & ENVSYS_LFLAG) == 0) &&
    421 			    (flags & ENVSYS_DFLAG)) {
    422 				(void)printf("%s (checking events every ",
    423 				    dnp);
    424 				if (edp->refresh_timo == 1)
    425 					(void)printf("second)\n");
    426 				else
    427 					(void)printf("%d seconds)\n",
    428 					    (int)edp->refresh_timo);
    429 			}
    430 
    431 			free(edp);
    432 			edp = NULL;
    433 		}
    434 		prop_object_iterator_release(iter);
    435 	}
    436 
    437 	/* print sensors now */
    438 	if (sensors) {
    439 		char *str = strdup(sensors);
    440 		if (!str) {
    441 			rval = ENOMEM;
    442 			goto out;
    443 		}
    444 		rval = check_sensors(str);
    445 		free(str);
    446 	}
    447 	if ((flags & ENVSYS_LFLAG) == 0 && (flags & ENVSYS_DFLAG) == 0)
    448 		print_sensors();
    449 	if (interval)
    450 		(void)printf("\n");
    451 
    452 out:
    453 	while ((sensor = SIMPLEQ_FIRST(&sensors_list))) {
    454 		SIMPLEQ_REMOVE_HEAD(&sensors_list, entries);
    455 		free(sensor);
    456 	}
    457 	if (edp)
    458 		free(edp);
    459 	prop_object_release(dict);
    460 	return rval;
    461 }
    462 
    463 static int
    464 find_sensors(prop_array_t array, const char *dvname, dvprops_t edp)
    465 {
    466 	prop_object_iterator_t iter;
    467 	prop_object_t obj, obj1, obj2;
    468 	prop_string_t state, desc = NULL;
    469 	sensor_t sensor = NULL;
    470 	sensor_stats_t stats = NULL;
    471 
    472 	iter = prop_array_iterator(array);
    473 	if (!iter)
    474 		return ENOMEM;
    475 
    476 	/* iterate over the array of dictionaries */
    477 	while ((obj = prop_object_iterator_next(iter)) != NULL) {
    478 		/* get the refresh-timeout property */
    479 		obj2 = prop_dictionary_get(obj, "device-properties");
    480 		if (obj2) {
    481 			if (!edp)
    482 				continue;
    483 			if (!prop_dictionary_get_uint64(obj2,
    484 							"refresh-timeout",
    485 							&edp->refresh_timo))
    486 				continue;
    487 		}
    488 
    489 		/* new sensor coming */
    490 		sensor = calloc(1, sizeof(*sensor));
    491 		if (sensor == NULL) {
    492 			prop_object_iterator_release(iter);
    493 			return ENOMEM;
    494 		}
    495 
    496 		/* copy device name */
    497 		(void)strlcpy(sensor->dvname, dvname, sizeof(sensor->dvname));
    498 
    499 		/* description string */
    500 		desc = prop_dictionary_get(obj, "description");
    501 		if (desc) {
    502 			/* copy description */
    503 			(void)strlcpy(sensor->desc,
    504 			    prop_string_cstring_nocopy(desc),
    505 		    	    sizeof(sensor->desc));
    506 		} else {
    507 			free(sensor);
    508 			continue;
    509 		}
    510 
    511 		/* type string */
    512 		obj1  = prop_dictionary_get(obj, "type");
    513 		if (obj1) {
    514 			/* copy type */
    515 			(void)strlcpy(sensor->type,
    516 		    	    prop_string_cstring_nocopy(obj1),
    517 		    	    sizeof(sensor->type));
    518 		} else {
    519 			free(sensor);
    520 			continue;
    521 		}
    522 
    523 		/* check sensor's state */
    524 		state = prop_dictionary_get(obj, "state");
    525 
    526 		/* mark sensors with invalid/unknown state */
    527 		if ((prop_string_equals_cstring(state, "invalid") ||
    528 		     prop_string_equals_cstring(state, "unknown")))
    529 			sensor->invalid = true;
    530 
    531 		/* get current drive state string */
    532 		obj1 = prop_dictionary_get(obj, "drive-state");
    533 		if (obj1) {
    534 			(void)strlcpy(sensor->drvstate,
    535 			    prop_string_cstring_nocopy(obj1),
    536 			    sizeof(sensor->drvstate));
    537 		}
    538 
    539 		/* get current battery capacity string */
    540 		obj1 = prop_dictionary_get(obj, "battery-capacity");
    541 		if (obj1) {
    542 			(void)strlcpy(sensor->battcap,
    543 			    prop_string_cstring_nocopy(obj1),
    544 			    sizeof(sensor->battcap));
    545 		}
    546 
    547 		/* get current value */
    548 		obj1 = prop_dictionary_get(obj, "cur-value");
    549 		if (obj1)
    550 			sensor->cur_value = prop_number_integer_value(obj1);
    551 
    552 		/* get max value */
    553 		obj1 = prop_dictionary_get(obj, "max-value");
    554 		if (obj1)
    555 			sensor->max_value = prop_number_integer_value(obj1);
    556 
    557 		/* get min value */
    558 		obj1 = prop_dictionary_get(obj, "min-value");
    559 		if (obj1)
    560 			sensor->min_value = prop_number_integer_value(obj1);
    561 
    562 		/* get avg value */
    563 		obj1 = prop_dictionary_get(obj, "avg-value");
    564 		if (obj1)
    565 			sensor->avg_value = prop_number_integer_value(obj1);
    566 
    567 		/* get percentage flag */
    568 		obj1 = prop_dictionary_get(obj, "want-percentage");
    569 		if (obj1)
    570 			sensor->percentage = prop_bool_true(obj1);
    571 
    572 		/* get critical max value if available */
    573 		obj1 = prop_dictionary_get(obj, "critical-max");
    574 		if (obj1)
    575 			sensor->critmax_value = prop_number_integer_value(obj1);
    576 
    577 		/* get maximum capacity value if available */
    578 		obj1 = prop_dictionary_get(obj, "maximum-capacity");
    579 		if (obj1)
    580 			sensor->critmax_value = prop_number_integer_value(obj1);
    581 
    582 		/* get critical min value if available */
    583 		obj1 = prop_dictionary_get(obj, "critical-min");
    584 		if (obj1)
    585 			sensor->critmin_value = prop_number_integer_value(obj1);
    586 
    587 		/* get critical capacity value if available */
    588 		obj1 = prop_dictionary_get(obj, "critical-capacity");
    589 		if (obj1)
    590 			sensor->critmin_value = prop_number_integer_value(obj1);
    591 
    592 		/* get warning max value if available */
    593 		obj1 = prop_dictionary_get(obj, "warning-max");
    594 		if (obj1)
    595 			sensor->warnmax_value = prop_number_integer_value(obj1);
    596 
    597 		/* get high capacity value if available */
    598 		obj1 = prop_dictionary_get(obj, "high-capacity");
    599 		if (obj1)
    600 			sensor->warnmax_value = prop_number_integer_value(obj1);
    601 
    602 		/* get warning min value if available */
    603 		obj1 = prop_dictionary_get(obj, "warning-min");
    604 		if (obj1)
    605 			sensor->warnmin_value = prop_number_integer_value(obj1);
    606 
    607 		/* get warning capacity value if available */
    608 		obj1 = prop_dictionary_get(obj, "warning-capacity");
    609 		if (obj1)
    610 			sensor->warnmin_value = prop_number_integer_value(obj1);
    611 
    612 		/* print sensor names if -l was given */
    613 		if (flags & ENVSYS_LFLAG) {
    614 			if (width)
    615 				(void)printf("%*s\n", width,
    616 				    prop_string_cstring_nocopy(desc));
    617 			else
    618 				(void)printf("%s\n",
    619 				    prop_string_cstring_nocopy(desc));
    620 		}
    621 
    622 		/* Add the sensor into the list */
    623 		SIMPLEQ_INSERT_TAIL(&sensors_list, sensor, entries);
    624 
    625 		/* Collect statistics if flag enabled */
    626 		if (statistics) {
    627 			/* ignore sensors not relevant for statistics */
    628 			if ((strcmp(sensor->type, "Indicator") == 0) ||
    629 			    (strcmp(sensor->type, "Battery charge") == 0) ||
    630 			    (strcmp(sensor->type, "Drive") == 0))
    631 				continue;
    632 
    633 			/* ignore invalid data */
    634 			if (sensor->invalid || !sensor->cur_value)
    635 				continue;
    636 
    637 			/* find or allocate a new statistics sensor */
    638 			stats = find_stats_sensor(sensor->desc);
    639 			if (stats == NULL) {
    640 				free(sensor);
    641 				prop_object_iterator_release(iter);
    642 				return ENOMEM;
    643 			}
    644 
    645 			/* collect data */
    646 			if (!stats->max)
    647 				stats->max = sensor->cur_value;
    648 			if (!stats->min)
    649 				stats->min = sensor->cur_value;
    650 
    651 			if (sensor->cur_value > stats->max)
    652 				stats->max = sensor->cur_value;
    653 
    654 			if (sensor->cur_value < stats->min)
    655 				stats->min = sensor->cur_value;
    656 
    657 			/* compute avg value */
    658 			if (stats->max && stats->min)
    659 				stats->avg =
    660 				    (sensor->cur_value + stats->max +
    661 				    stats->min) / 3;
    662 		}
    663 	}
    664 
    665 	/* free memory */
    666 	prop_object_iterator_release(iter);
    667 	return 0;
    668 }
    669 
    670 static int
    671 check_sensors(char *str)
    672 {
    673 	sensor_t sensor = NULL;
    674 	char *dvstring, *sstring, *p, *last;
    675 	bool sensor_found = false;
    676 
    677 	/*
    678 	 * Parse device name and sensor description and find out
    679 	 * if the sensor is valid.
    680 	 */
    681 	for ((p = strtok_r(str, ",", &last)); p;
    682 	     (p = strtok_r(NULL, ",", &last))) {
    683 		/* get device name */
    684 		dvstring = strtok(p, ":");
    685 		if (dvstring == NULL) {
    686 			warnx("missing device name");
    687 			return EINVAL;
    688 		}
    689 
    690 		/* get sensor description */
    691 		sstring = strtok(NULL, ":");
    692 		if (sstring == NULL) {
    693 			warnx("missing sensor description");
    694 			return EINVAL;
    695 		}
    696 
    697 		SIMPLEQ_FOREACH(sensor, &sensors_list, entries) {
    698 			/* skip until we match device */
    699 			if (strcmp(dvstring, sensor->dvname))
    700 				continue;
    701 			if (strcmp(sstring, sensor->desc) == 0) {
    702 				sensor->visible = true;
    703 				sensor_found = true;
    704 				break;
    705 			}
    706 		}
    707 		if (sensor_found == false) {
    708 			warnx("unknown sensor `%s' for device `%s'",
    709 		       	    sstring, dvstring);
    710 			return EINVAL;
    711 		}
    712 		sensor_found = false;
    713 	}
    714 
    715 	/* check if all sensors were ok, and error out if not */
    716 	SIMPLEQ_FOREACH(sensor, &sensors_list, entries)
    717 		if (sensor->visible)
    718 			return 0;
    719 
    720 	warnx("no sensors selected to display");
    721 	return EINVAL;
    722 }
    723 
    724 static void
    725 print_sensors(void)
    726 {
    727 	sensor_t sensor;
    728 	sensor_stats_t stats = NULL;
    729 	size_t maxlen = 0, ilen;
    730 	double temp = 0;
    731 	const char *invalid = "N/A", *degrees, *tmpstr, *stype;
    732 	const char *a, *b, *c, *d, *e, *units;
    733 
    734 	tmpstr = stype = d = e = NULL;
    735 
    736 	/* find the longest description */
    737 	SIMPLEQ_FOREACH(sensor, &sensors_list, entries)
    738 		if (strlen(sensor->desc) > maxlen)
    739 			maxlen = strlen(sensor->desc);
    740 
    741 	if (width)
    742 		maxlen = width;
    743 
    744 	/*
    745 	 * Print a header at the bottom only once showing different
    746 	 * members if the statistics flag is set or not.
    747 	 *
    748 	 * As bonus if -s is set, only print this header every 10 iterations
    749 	 * to avoid redundancy... like vmstat(1).
    750 	 */
    751 
    752 	a = "Current";
    753 	units = "Unit";
    754 	if (statistics) {
    755 		b = "Max";
    756 		c = "Min";
    757 		d = "Avg";
    758 	} else {
    759 		b = "CritMax";
    760 		c = "WarnMax";
    761 		d = "WarnMin";
    762 		e = "CritMin";
    763 	}
    764 
    765 	if (!sensors || (!header_passes && sensors) ||
    766 	    (header_passes == 10 && sensors)) {
    767 		if (statistics)
    768 			(void)printf("%s%*s  %9s %8s %8s %8s %6s\n",
    769 			    mydevname ? "" : "  ", (int)maxlen,
    770 			    "", a, b, c, d, units);
    771 		else
    772 			(void)printf("%s%*s  %9s %8s %8s %8s %8s %4s\n",
    773 			    mydevname ? "" : "  ", (int)maxlen,
    774 			    "", a, b, c, d, e, units);
    775 		if (sensors && header_passes == 10)
    776 			header_passes = 0;
    777 	}
    778 	if (sensors)
    779 		header_passes++;
    780 
    781 	/* print the sensors */
    782 	SIMPLEQ_FOREACH(sensor, &sensors_list, entries) {
    783 		/* skip sensors that were not marked as visible */
    784 		if (sensors && !sensor->visible)
    785 			continue;
    786 
    787 		/* skip invalid sensors if -I is set */
    788 		if ((flags & ENVSYS_IFLAG) && sensor->invalid)
    789 			continue;
    790 
    791 		/* print device name */
    792 		if (!mydevname) {
    793 			if (tmpstr == NULL || strcmp(tmpstr, sensor->dvname))
    794 				printf("[%s]\n", sensor->dvname);
    795 
    796 			tmpstr = sensor->dvname;
    797 		}
    798 
    799 		/* find out the statistics sensor */
    800 		if (statistics) {
    801 			stats = find_stats_sensor(sensor->desc);
    802 			if (stats == NULL) {
    803 				/* No statistics for this sensor */
    804 				continue;
    805 			}
    806 		}
    807 
    808 		/* print sensor description */
    809 		(void)printf("%s%*.*s", mydevname ? "" : "  ", (int)maxlen,
    810 		    (int)maxlen, sensor->desc);
    811 
    812 		/* print invalid string */
    813 		if (sensor->invalid) {
    814 			(void)printf(": %9s\n", invalid);
    815 			continue;
    816 		}
    817 
    818 		/*
    819 		 * Indicator and Battery charge sensors.
    820 		 */
    821 		if ((strcmp(sensor->type, "Indicator") == 0) ||
    822 		    (strcmp(sensor->type, "Battery charge") == 0)) {
    823 
    824 			(void)printf(":%10s", sensor->cur_value ? "ON" : "OFF");
    825 
    826 /* convert and print a temp value in degC, degF, or Kelvin */
    827 #define PRINTTEMP(a)						\
    828 do {								\
    829 	if (a) {						\
    830 		temp = ((a) / 1000000.0);			\
    831 		if (flags & ENVSYS_FFLAG) {			\
    832 			temp = temp * (9.0 / 5.0) - 459.67;	\
    833 			degrees = "degF";			\
    834 		} else if (flags & ENVSYS_KFLAG) {		\
    835 			degrees = "K";				\
    836 		} else {					\
    837 			temp = temp - 273.15;			\
    838 			degrees = "degC";			\
    839 		}						\
    840 		(void)printf("%*.3f ", (int)ilen, temp);	\
    841 		ilen = 8;					\
    842 	} else							\
    843 		ilen += 9;					\
    844 } while (/* CONSTCOND */ 0)
    845 
    846 		/* temperatures */
    847 		} else if (strcmp(sensor->type, "Temperature") == 0) {
    848 
    849 			ilen = 10;
    850 			degrees = "";
    851 			(void)printf(":");
    852 			PRINTTEMP(sensor->cur_value);
    853 			stype = degrees;
    854 
    855 			ilen = 8;
    856 			if (statistics) {
    857 				/* show statistics if flag set */
    858 				PRINTTEMP(stats->max);
    859 				PRINTTEMP(stats->min);
    860 				PRINTTEMP(stats->avg);
    861 				ilen += 2;
    862 			} else {
    863 				PRINTTEMP(sensor->critmax_value);
    864 				PRINTTEMP(sensor->warnmax_value);
    865 				PRINTTEMP(sensor->warnmin_value);
    866 				PRINTTEMP(sensor->critmin_value);
    867 			}
    868 			(void)printf("%*s", (int)ilen - 4, stype);
    869 #undef PRINTTEMP
    870 
    871 		/* fans */
    872 		} else if (strcmp(sensor->type, "Fan") == 0) {
    873 			stype = "RPM";
    874 
    875 			(void)printf(":%10u ", sensor->cur_value);
    876 
    877 			ilen = 8;
    878 			if (statistics) {
    879 				/* show statistics if flag set */
    880 				(void)printf("%8u %8u %8u ",
    881 				    stats->max, stats->min, stats->avg);
    882 				ilen += 2;
    883 			} else {
    884 				if (sensor->critmax_value) {
    885 					(void)printf("%*u ", (int)ilen,
    886 					    sensor->critmax_value);
    887 					ilen = 8;
    888 				} else
    889 					ilen += 9;
    890 
    891 				if (sensor->warnmax_value) {
    892 					(void)printf("%*u ", (int)ilen,
    893 					    sensor->warnmax_value);
    894 					ilen = 8;
    895 				} else
    896 					ilen += 9;
    897 
    898 				if (sensor->warnmin_value) {
    899 					(void)printf("%*u ", (int)ilen,
    900 					    sensor->warnmin_value);
    901 					ilen = 8;
    902 				} else
    903 					ilen += 9;
    904 
    905 				if (sensor->critmin_value) {
    906 					(void)printf( "%*u ", (int)ilen,
    907 					    sensor->critmin_value);
    908 					ilen = 8;
    909 				} else
    910 					ilen += 9;
    911 
    912 			}
    913 
    914 			(void)printf("%*s", (int)ilen - 4, stype);
    915 
    916 		/* integers */
    917 		} else if (strcmp(sensor->type, "Integer") == 0) {
    918 
    919 			stype = "none";
    920 
    921 			(void)printf(":%10d ", sensor->cur_value);
    922 
    923 			ilen = 8;
    924 			if (statistics) {
    925 				/* show statistics if flag set */
    926 				(void)printf("%8u %8u %8u ",
    927 				    stats->max, stats->min, stats->avg);
    928 				ilen += 2;
    929 			} else {
    930 				if (sensor->critmax_value) {
    931 					(void)printf("%*u ", (int)ilen,
    932 					    sensor->critmax_value);
    933 					ilen = 8;
    934 				} else
    935 					ilen += 9;
    936 
    937 				if (sensor->warnmax_value) {
    938 					(void)printf("%*u ", (int)ilen,
    939 					    sensor->warnmax_value);
    940 					ilen = 8;
    941 				} else
    942 					ilen += 9;
    943 
    944 				if (sensor->warnmin_value) {
    945 					(void)printf("%*u ", (int)ilen,
    946 					    sensor->warnmin_value);
    947 					ilen = 8;
    948 				} else
    949 					ilen += 9;
    950 
    951 				if (sensor->critmin_value) {
    952 					(void)printf( "%*u ", (int)ilen,
    953 					    sensor->critmin_value);
    954 					ilen = 8;
    955 				} else
    956 					ilen += 9;
    957 
    958 			}
    959 
    960 			(void)printf("%*s", (int)ilen - 4, stype);
    961 
    962 		/* drives  */
    963 		} else if (strcmp(sensor->type, "Drive") == 0) {
    964 
    965 			(void)printf(":%10s", sensor->drvstate);
    966 
    967 		/* Battery capacity */
    968 		} else if (strcmp(sensor->type, "Battery capacity") == 0) {
    969 
    970 			(void)printf(":%10s", sensor->battcap);
    971 
    972 		/* everything else */
    973 		} else {
    974 			if (strcmp(sensor->type, "Voltage DC") == 0)
    975 				stype = "V";
    976 			else if (strcmp(sensor->type, "Voltage AC") == 0)
    977 				stype = "VAC";
    978 			else if (strcmp(sensor->type, "Ampere") == 0)
    979 				stype = "A";
    980 			else if (strcmp(sensor->type, "Watts") == 0)
    981 				stype = "W";
    982 			else if (strcmp(sensor->type, "Ohms") == 0)
    983 				stype = "Ohms";
    984 			else if (strcmp(sensor->type, "Watt hour") == 0)
    985 				stype = "Wh";
    986 			else if (strcmp(sensor->type, "Ampere hour") == 0)
    987 				stype = "Ah";
    988 
    989 			(void)printf(":%10.3f ",
    990 			    sensor->cur_value / 1000000.0);
    991 
    992 			ilen = 8;
    993 			if (!statistics) {
    994 
    995 /* Print percentage of max_value */
    996 #define PRINTPCT(a)							\
    997 do {									\
    998 	if (sensor->a && sensor->max_value) {				\
    999 		(void)printf("%*.3f%%", (int)ilen,			\
   1000 			(sensor->a * 100.0) / sensor->max_value);	\
   1001 		ilen = 8;						\
   1002 	} else								\
   1003 		ilen += 9;						\
   1004 } while ( /* CONSTCOND*/ 0 )
   1005 
   1006 /* Print a generic sensor value */
   1007 #define PRINTVAL(a)							\
   1008 do {									\
   1009 	if (sensor->a) {						\
   1010 		(void)printf("%*.3f ", (int)ilen, sensor->a / 1000000.0); \
   1011 		ilen = 8;						\
   1012 	} else								\
   1013 		ilen += 9;						\
   1014 } while ( /* CONSTCOND*/ 0 )
   1015 
   1016 
   1017 				if (sensor->percentage) {
   1018 					PRINTPCT(critmax_value);
   1019 					PRINTPCT(warnmax_value);
   1020 					PRINTPCT(warnmin_value);
   1021 					PRINTPCT(critmin_value);
   1022 				} else {
   1023 
   1024 					PRINTVAL(critmax_value);
   1025 					PRINTVAL(warnmax_value);
   1026 					PRINTVAL(warnmin_value);
   1027 					PRINTVAL(critmin_value);
   1028 #undef PRINTPCT
   1029 #undef PRINTVAL
   1030 				}
   1031 			}
   1032 
   1033 			if (statistics && !sensor->percentage) {
   1034 				/* show statistics if flag set */
   1035 				(void)printf("%8.3f %8.3f %8.3f ",
   1036 				    stats->max / 1000000.0,
   1037 				    stats->min / 1000000.0,
   1038 				    stats->avg / 1000000.0);
   1039 				ilen += 2;
   1040 			}
   1041 
   1042 			(void)printf("%*s", (int)ilen - 4, stype);
   1043 
   1044 			if (sensor->percentage && sensor->max_value) {
   1045 				(void)printf(" (%5.2f%%)",
   1046 				    (sensor->cur_value * 100.0) /
   1047 				    sensor->max_value);
   1048 			}
   1049 		}
   1050 		(void)printf("\n");
   1051 	}
   1052 }
   1053 
   1054 static int
   1055 usage(void)
   1056 {
   1057 	(void)fprintf(stderr, "Usage: %s [-DfIklrSTx] ", getprogname());
   1058 	(void)fprintf(stderr, "[-c file] [-d device] [-i interval] ");
   1059 	(void)fprintf(stderr, "[-s device:sensor,...] [-w width]\n");
   1060 	exit(EXIT_FAILURE);
   1061 	/* NOTREACHED */
   1062 }
   1063