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nut/drivers/apcsmart.c
Arnaud Quette fefe62b2bd Imported Upstream version 2.6.4
2012-06-01 15:55:19 +02:00

2250 lines
51 KiB
C
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/*
* apcsmart.c - driver for APC smart protocol units (originally "newapc")
*
* Copyright (C) 1999 Russell Kroll <rkroll@exploits.org>
* (C) 2000 Nigel Metheringham <Nigel.Metheringham@Intechnology.co.uk>
* (C) 2011 Michal Soltys <soltys@ziu.info>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include <sys/types.h>
#include <sys/file.h>
#include <regex.h>
#include <ctype.h>
#include "main.h"
#include "serial.h"
#include "timehead.h"
#include "apcsmart.h"
#include "apcsmart_tabs.h"
/* driver description structure */
upsdrv_info_t upsdrv_info = {
DRIVER_NAME,
DRIVER_VERSION,
"Russell Kroll <rkroll@exploits.org>\n"
"Nigel Metheringham <Nigel.Metheringham@Intechnology.co.uk>\n"
"Michal Soltys <soltys@ziu.info>",
DRV_STABLE,
{ &apc_tab_info, NULL }
};
static int ups_status = 0;
/*
* Aix compatible names
*/
#if defined(VWERSE) && !defined(VWERASE)
#define VWERASE VWERSE
#endif /* VWERSE && !VWERASE */
#if defined(VDISCRD) && !defined(VDISCARD)
#define VDISCARD VDISCRD
#endif /* VDISCRD && !VDISCARD */
#ifndef CTRL
#define CONTROL(x) (x&037)
#else
#define CONTROL CTRL
#endif
/*
* Allow use of system default characters if defined and reasonable.
* These are based on the BSD ttydefaults.h
*/
#ifndef CDISCARD
#define CDISCARD CONTROL('O')
#endif
#ifndef CDSUSP
#define CDSUSP CONTROL('Y')
#endif
#ifndef CEOF
#define CEOF CONTROL('D')
#endif
#ifndef CEOL
#define CEOL 0xff /* was 0 */
#endif
#ifndef CERASE
#define CERASE 0177
#endif
#ifndef CINTR
#define CINTR CONTROL('C')
#endif
#ifndef CKILL
#define CKILL CONTROL('U') /* was '@' */
#endif
#ifndef CLNEXT
#define CLNEXT CONTROL('V')
#endif
#ifndef CMIN
#define CMIN CEOF
#endif
#ifndef CQUIT
#define CQUIT CONTROL('\\')
#endif
#ifndef CRPRNT
#define CRPRNT CONTROL('R')
#endif
#ifndef CREPRINT
#define CREPRINT CRPRNT
#endif
#ifndef CSTART
#define CSTART CONTROL('Q')
#endif
#ifndef CSTOP
#define CSTOP CONTROL('S')
#endif
#ifndef CSUSP
#define CSUSP CONTROL('Z')
#endif
#ifndef CTIME
#define CTIME CEOL
#endif
#ifndef CWERASE
#define CWERASE CONTROL('W')
#endif
/* some forwards */
static int sdcmd_S(const void *);
static int sdcmd_AT(const void *);
static int sdcmd_K(const void *);
static int sdcmd_Z(const void *);
static int sdcmd_CS(const void *);
static int (*sdlist[])(const void *) = {
sdcmd_S,
sdcmd_AT,
sdcmd_K,
sdcmd_Z,
sdcmd_CS,
};
#define SDIDX_S 0
#define SDIDX_AT 1
#define SDIDX_K 2
#define SDIDX_Z 3
#define SDIDX_CS 4
#define SDCNT ((int)(sizeof(sdlist)/sizeof(sdlist[0])))
static apc_vartab_t *vartab_lookup_char(char cmdchar)
{
int i;
for (i = 0; apc_vartab[i].name != NULL; i++)
if (apc_vartab[i].cmd == cmdchar)
return &apc_vartab[i];
return NULL;
}
static apc_vartab_t *vartab_lookup_name(const char *var)
{
int i;
for (i = 0; apc_vartab[i].name != NULL; i++)
if (!(apc_vartab[i].flags & APC_DEPR) &&
!strcasecmp(apc_vartab[i].name, var))
return &apc_vartab[i];
return NULL;
}
/* FUTURE: change to use function pointers */
static int rexhlp(const char *rex, const char *val)
{
int ret;
regex_t mbuf;
regcomp(&mbuf, rex, REG_EXTENDED|REG_NOSUB);
ret = regexec(&mbuf, val, 0,0,0);
regfree(&mbuf);
return ret;
}
/* convert APC formatting to NUT formatting */
/* TODO: handle errors better */
static const char *convert_data(apc_vartab_t *cmd_entry, const char *upsval)
{
static char temp[APC_LBUF];
int tval;
/* this should never happen */
if (strlen(upsval) >= sizeof(temp)) {
upslogx(LOG_CRIT, "length of [%s] too long", cmd_entry->name);
strncpy(temp, upsval, sizeof(temp) - 1);
temp[sizeof(temp) - 1] = '\0';
return temp;
}
switch(cmd_entry->flags & APC_F_MASK) {
case APC_F_PERCENT:
case APC_F_VOLT:
case APC_F_AMP:
case APC_F_CELSIUS:
case APC_F_HEX:
case APC_F_DEC:
case APC_F_SECONDS:
case APC_F_LEAVE:
/* no conversion for any of these */
strcpy(temp, upsval);
return temp;
case APC_F_HOURS:
/* convert to seconds */
tval = 60 * 60 * strtol(upsval, NULL, 10);
snprintf(temp, sizeof(temp), "%d", tval);
return temp;
case APC_F_MINUTES:
/* Convert to seconds - NUT standard time measurement */
tval = 60 * strtol(upsval, NULL, 10);
/* Ignore errors - there's not much we can do */
snprintf(temp, sizeof(temp), "%d", tval);
return temp;
case APC_F_REASON:
switch (upsval[0]) {
case 'R': return "unacceptable utility voltage rate of change";
case 'H': return "high utility voltage";
case 'L': return "low utility voltage";
case 'T': return "line voltage notch or spike";
case 'O': return "no transfers yet since turnon";
case 'S': return "simulated power failure or UPS test";
default:
strcpy(temp, upsval);
return temp;
}
}
upslogx(LOG_NOTICE, "Unable to handle conversion of [%s]", cmd_entry->name);
strcpy(temp, upsval);
return temp;
}
static void apc_ser_set(void)
{
struct termios tio, tio_chk;
char *cable;
/*
* this must be called before the rest, as ser_set_speed() performs
* early initialization of the port, apart from changing speed
*/
ser_set_speed(upsfd, device_path, B2400);
memset(&tio, 0, sizeof(tio));
errno = 0;
if (tcgetattr(upsfd, &tio))
fatal_with_errno(EXIT_FAILURE, "tcgetattr(%s)", device_path);
/* set port mode: common stuff, canonical processing */
tio.c_cflag |= (CS8 | CLOCAL | CREAD);
tio.c_lflag |= ICANON;
#ifdef NOKERNINFO
tio.c_lflag |= NOKERNINFO;
#endif
tio.c_lflag &= ~(ISIG | IEXTEN);
tio.c_iflag |= (IGNCR | IGNPAR);
tio.c_iflag &= ~(IXON | IXOFF);
tio.c_cc[VEOL] = '*'; /* specially handled in apc_read() */
#ifdef _POSIX_VDISABLE
tio.c_cc[VERASE] = _POSIX_VDISABLE;
tio.c_cc[VKILL] = _POSIX_VDISABLE;
tio.c_cc[VEOF] = _POSIX_VDISABLE;
tio.c_cc[VEOL2] = _POSIX_VDISABLE;
#endif
#if 0
/* unused in canonical mode: */
tio.c_cc[VMIN] = 1;
tio.c_cc[VTIME] = 0;
#endif
if (tcflush(upsfd, TCIOFLUSH))
fatal_with_errno(EXIT_FAILURE, "tcflush(%s)", device_path);
/*
* warn:
* Note, that tcsetattr() returns success if /any/ of the requested
* changes could be successfully carried out. Thus the more complicated
* test.
*/
if (tcsetattr(upsfd, TCSANOW, &tio))
fatal_with_errno(EXIT_FAILURE, "tcsetattr(%s)", device_path);
/* clear status flags so that they don't affect our binary compare */
#ifdef PENDIN
tio.c_lflag &= ~PENDIN;
#endif
#ifdef FLUSHO
tio.c_lflag &= ~FLUSHO;
#endif
memset(&tio_chk, 0, sizeof(tio_chk));
if (tcgetattr(upsfd, &tio_chk))
fatal_with_errno(EXIT_FAILURE, "tcgetattr(%s)", device_path);
/* clear status flags so that they don't affect our binary compare */
#ifdef PENDIN
tio_chk.c_lflag &= ~PENDIN;
#endif
#ifdef FLUSHO
tio_chk.c_lflag &= ~FLUSHO;
#endif
if (memcmp(&tio_chk, &tio, sizeof(tio))) {
struct cchar {
const char *name;
int sub;
u_char def;
};
const struct cchar cchars1[] = {
#ifdef VDISCARD
{ "discard", VDISCARD, CDISCARD },
#endif
#ifdef VDSUSP
{ "dsusp", VDSUSP, CDSUSP },
#endif
{ "eof", VEOF, CEOF },
{ "eol", VEOL, CEOL },
{ "eol2", VEOL2, CEOL },
{ "erase", VERASE, CERASE },
#ifdef VINTR
{ "intr", VINTR, CINTR },
#endif
{ "kill", VKILL, CKILL },
{ "lnext", VLNEXT, CLNEXT },
{ "min", VMIN, CMIN },
{ "quit", VQUIT, CQUIT },
#ifdef VREPRINT
{ "reprint", VREPRINT, CREPRINT },
#endif
{ "start", VSTART, CSTART },
#ifdef VSTATUS
{ "status", VSTATUS, CSTATUS },
#endif
{ "stop", VSTOP, CSTOP },
{ "susp", VSUSP, CSUSP },
{ "time", VTIME, CTIME },
{ "werase", VWERASE, CWERASE },
{ .name = NULL },
};
const struct cchar *cp;
struct termios *tp;
upslogx(LOG_NOTICE, "%s: device reports different attributes than what were set", device_path);
/*
* According to the manual the most common problem is
* mis-matched combinations of input and output baud rates. If
* the combination is not supported then neither are changed.
* This should not be a problem here since we set them both to
* the same extremely common rate of 2400.
*/
tp = &tio;
upsdebugx(1, "tcsetattr(): gfmt1:cflag=%x:iflag=%x:lflag=%x:oflag=%x:",
(unsigned int) tp->c_cflag, (unsigned int) tp->c_iflag,
(unsigned int) tp->c_lflag, (unsigned int) tp->c_oflag);
for (cp = cchars1; cp->name; ++cp)
upsdebugx(1, "\t%s=%x:", cp->name, tp->c_cc[cp->sub]);
upsdebugx(1, "\tispeed=%d:ospeed=%d", (int) cfgetispeed(tp), (int) cfgetospeed(tp));
tp = &tio_chk;
upsdebugx(1, "tcgetattr(): gfmt1:cflag=%x:iflag=%x:lflag=%x:oflag=%x:",
(unsigned int) tp->c_cflag, (unsigned int) tp->c_iflag,
(unsigned int) tp->c_lflag, (unsigned int) tp->c_oflag);
for (cp = cchars1; cp->name; ++cp)
upsdebugx(1, "\t%s=%x:", cp->name, tp->c_cc[cp->sub]);
upsdebugx(1, "\tispeed=%d:ospeed=%d", (int) cfgetispeed(tp), (int) cfgetospeed(tp));
}
cable = getval("cable");
if (cable && !strcasecmp(cable, ALT_CABLE_1)) {
if (ser_set_dtr(upsfd, 1) == -1)
fatalx(EXIT_FAILURE, "ser_set_dtr() failed (%s)", device_path);
if (ser_set_rts(upsfd, 0) == -1)
fatalx(EXIT_FAILURE, "ser_set_rts() failed (%s)", device_path);
}
}
static void ups_status_set(void)
{
status_init();
if (ups_status & APC_STAT_CAL)
status_set("CAL"); /* calibration */
if (ups_status & APC_STAT_TRIM)
status_set("TRIM"); /* SmartTrim */
if (ups_status & APC_STAT_BOOST)
status_set("BOOST"); /* SmartBoost */
if (ups_status & APC_STAT_OL)
status_set("OL"); /* on line */
if (ups_status & APC_STAT_OB)
status_set("OB"); /* on battery */
if (ups_status & APC_STAT_OVER)
status_set("OVER"); /* overload */
if (ups_status & APC_STAT_LB)
status_set("LB"); /* low battery */
if (ups_status & APC_STAT_RB)
status_set("RB"); /* replace batt */
if (ups_status == 0)
status_set("OFF");
status_commit();
}
static void alert_handler(char ch)
{
switch (ch) {
case '!': /* clear OL, set OB */
upsdebugx(4, "alert_handler: OB");
ups_status &= ~APC_STAT_OL;
ups_status |= APC_STAT_OB;
break;
case '$': /* clear OB, set OL */
upsdebugx(4, "alert_handler: OL");
ups_status &= ~APC_STAT_OB;
ups_status |= APC_STAT_OL;
break;
case '%': /* set LB */
upsdebugx(4, "alert_handler: LB");
ups_status |= APC_STAT_LB;
break;
case '+': /* clear LB */
upsdebugx(4, "alert_handler: not LB");
ups_status &= ~APC_STAT_LB;
break;
case '#': /* set RB */
upsdebugx(4, "alert_handler: RB");
ups_status |= APC_STAT_RB;
break;
case '?': /* set OVER */
upsdebugx(4, "alert_handler: OVER");
ups_status |= APC_STAT_OVER;
break;
case '=': /* clear OVER */
upsdebugx(4, "alert_handler: not OVER");
ups_status &= ~APC_STAT_OVER;
break;
default:
upsdebugx(4, "alert_handler got 0x%02x (unhandled)", ch);
break;
}
ups_status_set();
}
/*
* we need a tiny bit different processing due to '*' and canonical mode; the
* function is subtly different from generic ser_get_line_alert()
*/
static int apc_read(char *buf, size_t buflen, int flags)
{
const char *iset = IGN_CHARS, *aset = "";
size_t count = 0;
int i, ret, sec = 3, usec = 0;
char temp[APC_LBUF];
if (upsfd == -1)
return 0;
if (flags & SER_D0) {
sec = 0; usec = 0;
}
if (flags & SER_DX) {
sec = 0; usec = 200000;
}
if (flags & SER_D1) {
sec = 1; usec = 500000;
}
if (flags & SER_D3) {
sec = 3; usec = 0;
}
if (flags & SER_AA) {
iset = IGN_AACHARS;
aset = ALERT_CHARS;
}
if (flags & SER_CC) {
iset = IGN_CCCHARS;
aset = "";
sec = 6; usec = 0;
}
if (flags & SER_CS) {
iset = IGN_CSCHARS;
aset = "";
sec = 6; usec = 0;
}
memset(buf, '\0', buflen);
while (count < buflen - 1) {
errno = 0;
ret = select_read(upsfd, temp, sizeof(temp), sec, usec);
/* error or no timeout allowed */
if (ret < 0 || (ret == 0 && !(flags & SER_TO))) {
ser_comm_fail("%s", ret ? strerror(errno) : "timeout");
return ret;
}
/* ok, timeout is acceptable */
if (ret == 0 && (flags & SER_TO)) {
/*
* but it doesn't imply ser_comm_good
*
* to be more precise - we might be in comm_fail
* condition, trying to "nudge" the UPS with some
* command obviously expecting timeout if the comm is
* still lost. This would result with filling logs with
* confusing comm lost/comm re-established pairs. Thus
* - just return here.
*/
return count;
}
/* parse input */
for (i = 0; i < ret; i++) {
/* standard "line received" condition */
if ((count == buflen - 1) || (temp[i] == ENDCHAR)) {
ser_comm_good();
return count;
}
/*
* '*' is set as a secondary EOL; convert to 'OK' only as a
* reply to shutdown command in sdok(); otherwise next
* select_read() will continue normally
*/
if ((flags & SER_HA) && temp[i] == '*') {
/*
* a bit paranoid, but remember '*' is not real EOL;
* there could be some firmware in existence, that
* would send both string: 'OK\n' and alert: '*'.
* Just in case, try to flush the input with small 1 sec.
* timeout
*/
memset(buf, '\0', buflen);
errno = 0;
ret = select_read(upsfd, temp, sizeof(temp), 1, 0);
if (ret < 0) {
ser_comm_fail("%s", strerror(errno));
return ret;
}
buf[0] = 'O';
buf[1] = 'K';
ser_comm_good();
return 2;
}
/* ignore set */
if (strchr(iset, temp[i]) || temp[i] == '*') {
continue;
}
/* alert set */
if (strchr(aset, temp[i])) {
alert_handler(temp[i]);
continue;
}
buf[count++] = temp[i];
}
}
ser_comm_good();
return count;
}
static int apc_write(unsigned char code)
{
errno = 0;
if (upsfd == -1)
return 0;
return ser_send_char(upsfd, code);
}
/*
* We have to watch out for NA, here;
* This is generally safe, as otherwise we will just timeout. The reason we do
* it, is that under certain conditions an ups might respond with NA for
* something it would normally handle (e.g. calling @ while being in powered
* off or hibernated state. If we keep sending the "arguments" after getting
* NA, they will be interpreted as commands, which is quite a bug :)
* Furthermore later flushes might not work properly, if the reply to those
* commands are generated with some delay.
*
* We also set errno to something usable, so outside upslog calls don't output
* confusing "success".
*/
static int apc_write_long(const char *code)
{
char temp[APC_LBUF];
int ret;
errno = 0;
if (upsfd == -1)
return 0;
ret = ser_send_char(upsfd, *code);
if (ret != 1)
return ret;
/* peek for the answer - anything at this point is failure */
ret = apc_read(temp, sizeof(temp), SER_DX|SER_TO);
if (ret) {
errno = ECANCELED;
return -1;
}
ret = ser_send_pace(upsfd, 50000, "%s", code + 1);
return ret < 0 ? ret : ret + 1;
}
static int apc_write_rep(unsigned char code)
{
char temp[APC_LBUF];
int ret;
errno = 0;
if (upsfd == -1)
return 0;
ret = ser_send_char(upsfd, code);
if (ret != 1)
return ret;
/* peek for the answer - anything at this point is failure */
ret = apc_read(temp, sizeof(temp), SER_DX|SER_TO);
if (ret) {
errno = ECANCELED;
return -1;
}
usleep(1300000);
ret = ser_send_char(upsfd, code);
if (ret != 1)
return ret;
return 2;
}
/* all flags other than SER_AA are ignored */
static void apc_flush(int flags)
{
char temp[APC_LBUF];
if (flags & SER_AA) {
tcflush(upsfd, TCOFLUSH);
while(apc_read(temp, sizeof(temp), SER_D0|SER_TO|SER_AA));
} else {
tcflush(upsfd, TCIOFLUSH);
/* tcflush(upsfd, TCIFLUSH); */
/* while(apc_read(temp, sizeof(temp), SER_D0|SER_TO)); */
}
}
static const char *preread_data(apc_vartab_t *vt)
{
int ret;
char temp[APC_LBUF];
upsdebugx(4, "preread_data: %s", vt->name);
apc_flush(0);
ret = apc_write(vt->cmd);
if (ret != 1) {
upslogx(LOG_ERR, "preread_data: apc_write failed");
return 0;
}
ret = apc_read(temp, sizeof(temp), SER_TO);
if (ret < 0) {
upslogx(LOG_ERR, "preread_data: apc_read failed");
return 0;
}
if (!ret || !strcmp(temp, "NA")) {
upslogx(LOG_ERR, "preread_data: %s timed out or not supported", vt->name);
return 0;
}
return convert_data(vt, temp);
}
static void remove_var(const char *cal, apc_vartab_t *vt)
{
const char *fmt;
char info[256];
if (isprint(vt->cmd))
fmt = "[%c]";
else
fmt = "[0x%02x]";
snprintf(info, sizeof(info), "%s%s%s",
"%s: verified variable [%s] (APC: ",
fmt,
") returned NA"
);
upsdebugx(1, info, cal, vt->name, vt->cmd);
snprintf(info, sizeof(info), "%s%s%s",
"%s: removing [%s] (APC: ",
fmt,
")"
);
upsdebugx(1, info, cal, vt->name, vt->cmd);
vt->flags &= ~APC_PRESENT;
dstate_delinfo(vt->name);
}
static int poll_data(apc_vartab_t *vt)
{
int ret;
char temp[APC_LBUF];
if (!(vt->flags & APC_PRESENT))
return 1;
upsdebugx(4, "poll_data: %s", vt->name);
apc_flush(SER_AA);
ret = apc_write(vt->cmd);
if (ret != 1) {
upslogx(LOG_ERR, "poll_data: apc_write failed");
dstate_datastale();
return 0;
}
if (apc_read(temp, sizeof(temp), SER_AA) < 1) {
dstate_datastale();
return 0;
}
/* automagically no longer supported by the hardware somehow */
if (!strcmp(temp, "NA"))
remove_var("poll_data", vt);
dstate_setinfo(vt->name, "%s", convert_data(vt, temp));
dstate_dataok();
return 1;
}
static int dfa_fwnew(const char *val)
{
int ret;
regex_t mbuf;
/* must be xx.yy.zz */
const char rex[] = "^[[:alnum:]]+\\.[[:alnum:]]+\\.[[:alnum:]]+$";
regcomp(&mbuf, rex, REG_EXTENDED|REG_NOSUB);
ret = regexec(&mbuf, val, 0,0,0);
regfree(&mbuf);
return ret;
}
static int dfa_cmdset(const char *val)
{
int ret;
regex_t mbuf;
/*
* must be #.alerts.commands ; we'll be a bit lax here
*/
const char rex[] = "^[0-9]\\.[^.]*\\.[^.]+$";
regcomp(&mbuf, rex, REG_EXTENDED|REG_NOSUB);
ret = regexec(&mbuf, val, 0,0,0);
regfree(&mbuf);
return ret;
}
static int valid_cmd(char cmd, const char *val)
{
char info[256], *fmt;
int ret;
switch (cmd) {
case APC_FW_NEW:
ret = dfa_fwnew(val);
break;
case APC_CMDSET:
ret = dfa_cmdset(val);
break;
default:
return 1;
}
if (ret) {
if (isprint(cmd))
fmt = "[%c]";
else
fmt = "[0x%02x]";
snprintf(info, sizeof(info), "%s%s%s",
"valid_cmd: cmd ",
fmt,
" failed regex match"
);
upslogx(LOG_WARNING, info, cmd);
}
return !ret;
}
/*
* query_ups() is called before any APC_PRESENT flags are determined;
* only for the variable provided
*/
static int query_ups(const char *var)
{
int i, j;
const char *temp;
apc_vartab_t *vt, *vtn;
/*
* at first run we know nothing about variable; we have to handle
* APC_MULTI gracefully as well
*/
for (i = 0; apc_vartab[i].name != NULL; i++) {
vt = &apc_vartab[i];
if (strcmp(vt->name, var) || vt->flags & APC_DEPR)
continue;
/* found, [try to] get it */
temp = preread_data(vt);
if (!temp || !valid_cmd(vt->cmd, temp)) {
if (vt->flags & APC_MULTI) {
vt->flags |= APC_DEPR;
continue;
}
upsdebugx(1, "query_ups: unknown variable %s", var);
break;
}
vt->flags |= APC_PRESENT;
dstate_setinfo(vt->name, "%s", temp);
dstate_dataok();
/* supported, deprecate all the remaining ones */
if (vt->flags & APC_MULTI)
for (j = i + 1; apc_vartab[j].name != NULL; j++) {
vtn = &apc_vartab[j];
if (strcmp(vtn->name, vt->name))
continue;
vtn->flags |= APC_DEPR;
vtn->flags &= ~APC_PRESENT;
}
return 1; /* success */
}
return 0;
}
/*
* This function iterates over vartab, deprecating nut:apc 1:n variables. We
* prefer earliest present variable. All the other ones must be marked as
* deprecated and as not present.
* This is intended to call after verifying the presence of variables.
* Otherwise it would take a while to execute due to preread_data()
*/
static void deprecate_vars(void)
{
int i, j;
const char *temp;
apc_vartab_t *vt, *vtn;
for (i = 0; apc_vartab[i].name != NULL; i++) {
vt = &apc_vartab[i];
if (vt->flags & APC_DEPR)
/* already handled */
continue;
if (!(vt->flags & APC_MULTI))
continue;
if (!(vt->flags & APC_PRESENT)) {
vt->flags |= APC_DEPR;
continue;
}
/* pre-read data, we have to verify it */
temp = preread_data(vt);
if (!temp || !valid_cmd(vt->cmd, temp)) {
upslogx(LOG_ERR, "deprecate_vars: [%s] is unreadable or invalid, deprecating", vt->name);
vt->flags |= APC_DEPR;
vt->flags &= ~APC_PRESENT;
continue;
}
/* multi & present, deprecate all the remaining ones */
for (j = i + 1; apc_vartab[j].name != NULL; j++) {
vtn = &apc_vartab[j];
if (strcmp(vtn->name, vt->name))
continue;
vtn->flags |= APC_DEPR;
vtn->flags &= ~APC_PRESENT;
}
dstate_setinfo(vt->name, "%s", temp);
dstate_dataok();
}
}
static void do_capabilities(int qco)
{
const char *ptr, *entptr;
char upsloc, temp[APC_LBUF], cmd, loc, etmp[APC_SBUF], *endtemp;
int nument, entlen, i, matrix, ret, valid;
apc_vartab_t *vt;
upsdebugx(1, "APC - About to get capabilities string");
/* If we can do caps, then we need the Firmware revision which has
the locale descriptor as the last character (ugh)
*/
ptr = dstate_getinfo("ups.firmware");
if (ptr)
upsloc = ptr[strlen(ptr) - 1];
else
upsloc = 0;
/* get capability string */
apc_flush(0);
ret = apc_write(APC_CAPS);
if (ret != 1) {
upslog_with_errno(LOG_ERR, "do_capabilities: apc_write failed");
return;
}
/*
* note - apc_read() needs larger timeout grace and different
* ignore set due to certain characters like '#' being received
*/
ret = apc_read(temp, sizeof(temp), SER_CC|SER_TO);
if ((ret < 1) || (!strcmp(temp, "NA"))) {
/* Early Smart-UPS, not as smart as later ones */
/* This should never happen since we only call
this if the REQ_CAPABILITIES command is supported
*/
upslogx(LOG_ERR, "ERROR: APC cannot do capabilities but said it could !");
return;
}
/* recv always puts a \0 at the end, so this is safe */
/* however it assumes a zero byte cannot be embedded */
endtemp = &temp[0] + strlen(temp);
if (temp[0] != '#') {
upsdebugx(1, "unrecognized capability start char %c", temp[0]);
upsdebugx(1, "please report this error [%s]", temp);
upslogx(LOG_ERR, "ERROR: unknown capability start char %c!",
temp[0]);
return;
}
if (temp[1] == '#') { /* Matrix-UPS */
matrix = 1;
ptr = &temp[0];
}
else {
ptr = &temp[1];
matrix = 0;
}
/* command char, location, # of entries, entry length */
while (ptr[0] != '\0') {
if (matrix)
ptr += 2; /* jump over repeating ## */
/* check for idiocy */
if (ptr >= endtemp) {
/* if we expected this, just ignore it */
if (qco)
return;
fatalx(EXIT_FAILURE,
"capability string has overflowed\n"
"please report this error\n"
"ERROR: capability overflow!"
);
}
cmd = ptr[0];
loc = ptr[1];
nument = ptr[2] - 48;
entlen = ptr[3] - 48;
entptr = &ptr[4];
vt = vartab_lookup_char(cmd);
valid = vt && ((loc == upsloc) || (loc == '4'));
/* mark this as writable */
if (valid) {
upsdebugx(1, "supported capability: %02x (%c) - %s",
cmd, loc, vt->name);
dstate_setflags(vt->name, ST_FLAG_RW);
/* make sure setvar knows what this is */
vt->flags |= APC_RW | APC_ENUM;
}
for (i = 0; i < nument; i++) {
if (valid) {
snprintf(etmp, entlen + 1, "%s", entptr);
dstate_addenum(vt->name, "%s", convert_data(vt, etmp));
}
entptr += entlen;
}
ptr = entptr;
}
}
static int update_status(void)
{
int ret;
char buf[APC_LBUF];
upsdebugx(4, "update_status");
apc_flush(SER_AA);
ret = apc_write(APC_STATUS);
if (ret != 1) {
upslog_with_errno(LOG_ERR, "update_status: apc_write failed");
dstate_datastale();
return 0;
}
ret = apc_read(buf, sizeof(buf), SER_AA);
if ((ret < 1) || (!strcmp(buf, "NA"))) {
dstate_datastale();
return 0;
}
ups_status = strtol(buf, 0, 16) & 0xff;
ups_status_set();
dstate_dataok();
return 1;
}
static void oldapcsetup(void)
{
/* really old models ignore REQ_MODEL, so find them first */
if (!query_ups("ups.model")) {
/* force the model name */
dstate_setinfo("ups.model", "Smart-UPS");
}
/* see if this might be an old Matrix-UPS instead */
if (query_ups("output.current"))
dstate_setinfo("ups.model", "Matrix-UPS");
query_ups("ups.firmware");
query_ups("ups.serial");
query_ups("input.voltage");
query_ups("battery.charge");
query_ups("battery.voltage");
query_ups("input.voltage");
query_ups("output.voltage");
query_ups("ups.temperature");
query_ups("ups.load");
update_status();
/*
* If we have come down this path then we dont do capabilities and
* other shiny features.
*/
}
static void protocol_verify(unsigned char cmd)
{
int i, found;
const char *fmt, *temp;
char info[256];
/* don't bother with cmd/var we don't care about */
if (strchr(APC_UNR_CMDS, cmd))
return;
if (isprint(cmd))
fmt = "[%c]";
else
fmt = "[0x%02x]";
/*
* see if it's a variable
* note: some nut variables map onto multiple APC ones (firmware)
*/
for (i = 0; apc_vartab[i].name != NULL; i++) {
if (apc_vartab[i].cmd == cmd) {
if (apc_vartab[i].flags & APC_MULTI) {
/* APC_MULTI are handled by deprecate_vars() */
apc_vartab[i].flags |= APC_PRESENT;
return;
}
temp = preread_data(&apc_vartab[i]);
if (!temp || !valid_cmd(cmd, temp)) {
snprintf(info, sizeof(info), "%s%s%s",
"UPS variable [%s] - APC: ",
fmt,
" invalid or unreadable"
);
upsdebugx(3, info, apc_vartab[i].name, cmd);
return;
}
apc_vartab[i].flags |= APC_PRESENT;
snprintf(info, sizeof(info), "%s%s",
"UPS supports variable [%s] - APC: ",
fmt
);
upsdebugx(3, info, apc_vartab[i].name, cmd);
dstate_setinfo(apc_vartab[i].name, "%s", temp);
dstate_dataok();
/* handle special data for our two strings */
if (apc_vartab[i].flags & APC_STRING) {
dstate_setflags(apc_vartab[i].name,
ST_FLAG_RW | ST_FLAG_STRING);
dstate_setaux(apc_vartab[i].name, APC_STRLEN);
apc_vartab[i].flags |= APC_RW;
}
return;
}
}
/*
* check the command list
* some APC commands map onto multiple nut ones (start and stop)
*/
found = 0;
for (i = 0; apc_cmdtab[i].name != NULL; i++) {
if (apc_cmdtab[i].cmd == cmd) {
snprintf(info, sizeof(info), "%s%s",
"UPS supports command [%s] - APC: ",
fmt
);
upsdebugx(3, info, apc_cmdtab[i].name, cmd);
dstate_addcmd(apc_cmdtab[i].name);
apc_cmdtab[i].flags |= APC_PRESENT;
found = 1;
}
}
if (found)
return;
snprintf(info, sizeof(info), "%s%s%s",
"protocol_verify - APC: ",
fmt,
" unrecognized"
);
upsdebugx(1, info, cmd);
}
/* some hardware is a special case - hotwire the list of cmdchars */
static int firmware_table_lookup(void)
{
int ret;
unsigned int i, j;
char buf[APC_LBUF];
upsdebugx(1, "attempting firmware lookup using command 'V'");
apc_flush(0);
ret = apc_write(APC_FW_OLD);
if (ret != 1) {
upslog_with_errno(LOG_ERR, "firmware_table_lookup: apc_write failed");
return 0;
}
ret = apc_read(buf, sizeof(buf), SER_TO);
/*
* Some UPSes support both 'V' and 'b'. As 'b' doesn't always return
* firmware version, we attempt that only if 'V' doesn't work.
*/
if ((ret < 1) || (!strcmp(buf, "NA"))) {
upsdebugx(1, "attempting firmware lookup using command 'b'");
ret = apc_write(APC_FW_NEW);
if (ret != 1) {
upslog_with_errno(LOG_ERR, "firmware_table_lookup: apc_write failed");
return 0;
}
ret = apc_read(buf, sizeof(buf), SER_TO);
if (ret < 1) {
upslog_with_errno(LOG_ERR, "firmware_table_lookup: apc_read failed");
return 0;
}
}
upsdebugx(2, "firmware: [%s]", buf);
/* this will be reworked if we get a lot of these things */
if (!strcmp(buf, "451.2.I"))
/* quirk_capability_overflow */
return 2;
for (i = 0; apc_compattab[i].firmware != NULL; i++) {
if (!strcmp(apc_compattab[i].firmware, buf)) {
upsdebugx(2, "matched - cmdchars: %s",
apc_compattab[i].cmdchars);
if (strspn(apc_compattab[i].firmware, "05")) {
dstate_setinfo("ups.model", "Matrix-UPS");
} else {
dstate_setinfo("ups.model", "Smart-UPS");
}
/* matched - run the cmdchars from the table */
for (j = 0; j < strlen(apc_compattab[i].cmdchars); j++)
protocol_verify(apc_compattab[i].cmdchars[j]);
deprecate_vars();
return 1; /* matched */
}
}
return 0;
}
static void getbaseinfo(void)
{
unsigned int i;
int ret, qco;
char *cmds, temp[APC_LBUF];
/*
* try firmware lookup first; we could start with 'a', but older models
* sometimes return other things than a command set
*/
qco = firmware_table_lookup();
if (qco == 1)
/* found compat */
return;
upsdebugx(2, "firmware not found in compatibility table - trying normal method");
upsdebugx(1, "APC - attempting to find command set");
/*
* Initially we ask the UPS what commands it takes If this fails we are
* going to need an alternate strategy - we can deal with that if it
* happens
*/
apc_flush(0);
ret = apc_write(APC_CMDSET);
if (ret != 1) {
upslog_with_errno(LOG_ERR, "getbaseinfo: apc_write failed");
return;
}
ret = apc_read(temp, sizeof(temp), SER_CS|SER_TO);
if ((ret < 1) || (!strcmp(temp, "NA")) || !valid_cmd(APC_CMDSET, temp)) {
/* We have an old dumb UPS - go to specific code for old stuff */
upsdebugx(1, "APC - trying to handle unknown model");
oldapcsetup();
return;
}
upsdebugx(1, "APC - Parsing out supported cmds and vars");
/*
* returned set is verified for validity above, so just extract
* what's interesting for us
*/
cmds = strrchr(temp, '.');
for (i = 1; i < strlen(cmds); i++)
protocol_verify(cmds[i]);
deprecate_vars();
/* if capabilities are supported, add them here */
if (strchr(cmds, APC_CAPS)) {
do_capabilities(qco);
upsdebugx(1, "APC - UPS capabilities determined");
}
}
/* check for calibration status and either start or stop */
static int do_cal(int start)
{
char temp[APC_LBUF];
int tval, ret;
apc_flush(SER_AA);
ret = apc_write(APC_STATUS);
if (ret != 1) {
upslog_with_errno(LOG_ERR, "do_cal: apc_write failed");
return STAT_INSTCMD_HANDLED; /* FUTURE: failure */
}
ret = apc_read(temp, sizeof(temp), SER_AA);
/* if we can't check the current calibration status, bail out */
if ((ret < 1) || (!strcmp(temp, "NA")))
return STAT_INSTCMD_HANDLED; /* FUTURE: failure */
tval = strtol(temp, 0, 16);
if (tval & APC_STAT_CAL) { /* calibration currently happening */
if (start == 1) {
/* requested start while calibration still running */
upslogx(LOG_INFO, "runtime calibration already in progress");
return STAT_INSTCMD_HANDLED; /* FUTURE: failure */
}
/* stop requested */
upslogx(LOG_INFO, "stopping runtime calibration");
ret = apc_write(APC_CMD_CALTOGGLE);
if (ret != 1) {
upslog_with_errno(LOG_ERR, "do_cal: apc_write failed");
return STAT_INSTCMD_HANDLED; /* FUTURE: failure */
}
ret = apc_read(temp, sizeof(temp), SER_AA);
if ((ret < 1) || (!strcmp(temp, "NA")) || (!strcmp(temp, "NO"))) {
upslogx(LOG_WARNING, "stop calibration failed: %s",
temp);
return STAT_INSTCMD_HANDLED; /* FUTURE: failure */
}
return STAT_INSTCMD_HANDLED; /* FUTURE: success */
}
/* calibration not happening */
if (start == 0) { /* stop requested */
upslogx(LOG_INFO, "runtime calibration not occurring");
return STAT_INSTCMD_HANDLED; /* FUTURE: failure */
}
upslogx(LOG_INFO, "starting runtime calibration");
ret = apc_write(APC_CMD_CALTOGGLE);
if (ret != 1) {
upslog_with_errno(LOG_ERR, "do_cal: apc_write failed");
return STAT_INSTCMD_HANDLED; /* FUTURE: failure */
}
ret = apc_read(temp, sizeof(temp), SER_AA);
if ((ret < 1) || (!strcmp(temp, "NA")) || (!strcmp(temp, "NO"))) {
upslogx(LOG_WARNING, "start calibration failed: %s", temp);
return STAT_INSTCMD_HANDLED; /* FUTURE: failure */
}
return STAT_INSTCMD_HANDLED; /* FUTURE: success */
}
#if 0
/* get the UPS talking to us in smart mode */
static int smartmode(void)
{
int ret;
char temp[APC_LBUF];
apc_flush(0);
ret = apc_write(APC_GOSMART);
if (ret != 1) {
upslog_with_errno(LOG_ERR, "smartmode: apc_write failed");
return 0;
}
ret = apc_read(temp, sizeof(temp), 0);
if ((ret < 1) || (!strcmp(temp, "NA")) || (!strcmp(temp, "NO"))) {
upslogx(LOG_CRIT, "enabling smartmode failed !");
return 0;
}
return 1;
}
#endif
/*
* get the UPS talking to us in smart mode
* note: this is weird overkill, but possibly excused due to some obscure
* hardware/firmware combinations; simpler version commmented out above, for
* now let's keep minimally adjusted old one
*/
static int smartmode(int cnt)
{
int ret, tries;
char temp[APC_LBUF];
for (tries = 0; tries < cnt; tries++) {
apc_flush(0);
ret = apc_write(APC_GOSMART);
if (ret != 1) {
upslog_with_errno(LOG_ERR, "smartmode: issuing 'Y' failed");
return 0;
}
ret = apc_read(temp, sizeof(temp), SER_D1);
if (ret > 0 && !strcmp(temp, "SM"))
return 1; /* success */
if (ret < 0) {
/* error, so we didn't timeout - wait a bit before retry */
sleep(1);
}
apc_flush(0);
ret = apc_write(27); /* ESC */
if (ret != 1) {
upslog_with_errno(LOG_ERR, "smartmode: issuing ESC failed");
return 0;
}
/* eat the response (might be NA, might be something else) */
apc_read(temp, sizeof(temp), SER_TO|SER_D1);
}
return 0; /* failure */
}
/*
* all shutdown commands should respond with 'OK' or '*'
* apc_read() handles conversion to 'OK' so we care only about that one
* ign allows for timeout without assuming an error
*/
static int sdok(int ign)
{
int ret;
char temp[APC_SBUF];
/*
* older upses on failed commands might just timeout, we cut down
* timeout grace though
* furthermore, command 'Z' will not reply with anything
*/
ret = apc_read(temp, sizeof(temp), SER_HA|SER_D1|SER_TO);
if (ret < 0) {
upslog_with_errno(LOG_ERR, "sdok: apc_read failed");
return STAT_INSTCMD_FAILED;
}
upsdebugx(4, "sdok: got \"%s\"", temp);
if ((!ret && ign) || !strcmp(temp, "OK")) {
upsdebugx(4, "sdok: last issued shutdown cmd succeeded");
return STAT_INSTCMD_HANDLED;
}
upsdebugx(1, "sdok: last issued shutdown cmd failed");
return STAT_INSTCMD_FAILED;
}
/* soft hibernate: S - working only when OB, otherwise ignored */
static int sdcmd_S(const void *foo)
{
int ret;
apc_flush(0);
upsdebugx(1, "issuing soft hibernate");
ret = apc_write(APC_CMD_SOFTDOWN);
if (ret < 0) {
upslog_with_errno(LOG_ERR, "sdcmd_S: issuing 'S' failed");
return STAT_INSTCMD_FAILED;
}
return sdok(0);
}
/* soft hibernate, hack version for CS 350 & co. */
static int sdcmd_CS(const void *foo)
{
int ret;
char temp[APC_SBUF];
upsdebugx(1, "using CS 350 'force OB' shutdown method");
if (ups_status & APC_STAT_OL) {
apc_flush(0);
upsdebugx(1, "status OL - forcing OB temporarily");
ret = apc_write(APC_CMD_SIMPWF);
if (ret < 0) {
upslog_with_errno(LOG_ERR, "sdcmd_CS: issuing 'U' failed");
return STAT_INSTCMD_FAILED;
}
/* eat response */
ret = apc_read(temp, sizeof(temp), SER_D1);
if (ret < 0) {
upslog_with_errno(LOG_ERR, "sdcmd_CS: 'U' returned nothing ?");
return STAT_INSTCMD_FAILED;
}
}
return sdcmd_S(0);
}
/*
* hard hibernate: @nnn / @nn
* note: works differently for older and new models, see manual page for
* thorough explanation
*/
static int sdcmd_AT(const void *str)
{
int ret, cnt, padto, i;
const char *awd = str;
char temp[APC_SBUF], *ptr;
if (!awd)
awd = "000";
cnt = strlen(awd);
padto = cnt == 2 ? 2 : 3;
temp[0] = APC_CMD_GRACEDOWN;
ptr = temp + 1;
for (i = cnt; i < padto ; i++) {
*ptr++ = '0';
}
strcpy(ptr, awd);
upsdebugx(1, "issuing '@' with %d minutes of additional wakeup delay", (int)strtol(awd, NULL, 10)*6);
apc_flush(0);
ret = apc_write_long(temp);
if (ret < 0) {
upslog_with_errno(LOG_ERR, "sdcmd_AT: issuing '@' with %d digits failed", padto);
return STAT_INSTCMD_FAILED;
}
ret = sdok(0);
if (ret == STAT_INSTCMD_HANDLED || padto == 3)
return ret;
upslog_with_errno(LOG_ERR, "sdcmd_AT: command '@' with 2 digits doesn't work - try 3 digits");
/*
* "tricky" part - we tried @nn variation and it (unsurprisingly)
* failed; we have to abort the sequence with something bogus to have
* the clean state; newer upses will respond with 'NO', older will be
* silent (YMMV);
*/
apc_write(APC_CMD_GRACEDOWN);
/* eat response, allow it to timeout */
apc_read(temp, sizeof(temp), SER_D1|SER_TO);
return STAT_INSTCMD_FAILED;
}
/* shutdown: K - delayed poweroff */
static int sdcmd_K(const void *foo)
{
int ret;
upsdebugx(1, "issuing 'K'");
apc_flush(0);
ret = apc_write_rep(APC_CMD_SHUTDOWN);
if (ret < 0) {
upslog_with_errno(LOG_ERR, "sdcmd_K: issuing 'K' failed");
return STAT_INSTCMD_FAILED;
}
return sdok(0);
}
/* shutdown: Z - immediate poweroff */
static int sdcmd_Z(const void *foo)
{
int ret;
upsdebugx(1, "issuing 'Z'");
apc_flush(0);
ret = apc_write_rep(APC_CMD_OFF);
if (ret < 0) {
upslog_with_errno(LOG_ERR, "sdcmd_Z: issuing 'Z' failed");
return STAT_INSTCMD_FAILED;
}
/* note: ups will not reply anything after this command */
return sdok(1);
}
static void upsdrv_shutdown_simple(void)
{
unsigned int sdtype = 0;
const char *val;
if ((val = getval("sdtype")))
sdtype = strtol(val, NULL, 10);
switch (sdtype) {
case 5: /* hard hibernate */
sdcmd_AT(getval("awd"));
break;
case 4: /* special hack for CS 350 and similar models */
sdcmd_CS(0);
break;
case 3: /* delayed poweroff */
sdcmd_K(0);
break;
case 2: /* instant poweroff */
sdcmd_Z(0);
break;
case 1:
/*
* Send a combined set of shutdown commands which can work
* better if the UPS gets power during shutdown process
* Specifically it sends both the soft shutdown 'S' and the
* hard hibernate '@nnn' commands
*/
upsdebugx(1, "UPS - currently %s - sending soft/hard hibernate commands",
(ups_status & APC_STAT_OL) ? "on-line" : "on battery");
/* S works only when OB */
if ((ups_status & APC_STAT_OB) && sdcmd_S(0) == STAT_INSTCMD_HANDLED)
break;
sdcmd_AT(getval("awd"));
break;
default:
/*
* Send @nnn or S, depending on OB / OL status
*/
if (ups_status & APC_STAT_OL) /* on line */
sdcmd_AT(getval("awd"));
else
sdcmd_S(0);
}
}
static void upsdrv_shutdown_advanced(void)
{
const void *arg;
const char *val;
size_t i, len;
val = getval("advorder");
len = strlen(val);
/*
* try each method in the list with a little bit of handling in certain
* cases
*/
for (i = 0; i < len; i++) {
switch (val[i] - '0') {
case SDIDX_AT:
arg = getval("awd");
break;
default:
arg = NULL;
}
if (sdlist[val[i] - '0'](arg) == STAT_INSTCMD_HANDLED)
break; /* finish if command succeeded */
}
}
/* power down the attached load immediately */
void upsdrv_shutdown(void)
{
char temp[APC_LBUF];
int ret;
if (!smartmode(1))
upsdebugx(1, "SM detection failed. Trying a shutdown command anyway");
/* check the line status */
ret = apc_write(APC_STATUS);
if (ret == 1) {
ret = apc_read(temp, sizeof(temp), SER_D1);
if (ret < 1) {
upsdebugx(1, "status read failed ! assuming on battery state");
ups_status = APC_STAT_LB | APC_STAT_OB;
} else {
ups_status = strtol(temp, 0, 16);
}
} else {
upsdebugx(1, "status request failed; assuming on battery state");
ups_status = APC_STAT_LB | APC_STAT_OB;
}
if (testvar("advorder") && strcasecmp(getval("advorder"), "no"))
upsdrv_shutdown_advanced();
else
upsdrv_shutdown_simple();
}
static void update_info_normal(void)
{
int i;
upsdebugx(3, "update_info_normal: starting");
for (i = 0; apc_vartab[i].name != NULL; i++) {
if ((apc_vartab[i].flags & APC_POLL) == 0)
continue;
if (!poll_data(&apc_vartab[i])) {
upsdebugx(3, "update_info_normal: poll_data (%s) failed - "
"aborting scan", apc_vartab[i].name);
return;
}
}
upsdebugx(3, "update_info_normal: done");
}
static void update_info_all(void)
{
int i;
upsdebugx(3, "update_info_all: starting");
for (i = 0; apc_vartab[i].name != NULL; i++) {
if (!poll_data(&apc_vartab[i])) {
upsdebugx(3, "update_info_all: poll_data (%s) failed - "
"aborting scan", apc_vartab[i].name);
return;
}
}
upsdebugx(3, "update_info_all: done");
}
static int setvar_enum(apc_vartab_t *vt, const char *val)
{
int i, ret;
char orig[APC_LBUF], temp[APC_LBUF];
const char *ptr;
apc_flush(SER_AA);
ret = apc_write(vt->cmd);
if (ret != 1) {
upslog_with_errno(LOG_ERR, "setvar_enum: apc_write failed");
return STAT_SET_FAILED;
}
ret = apc_read(orig, sizeof(orig), SER_AA);
if ((ret < 1) || (!strcmp(orig, "NA")))
return STAT_SET_FAILED;
ptr = convert_data(vt, orig);
/* suppress redundant changes - easier on the eeprom */
if (!strcmp(ptr, val)) {
upslogx(LOG_INFO, "ignoring enum SET %s='%s' (unchanged value)",
vt->name, val);
return STAT_SET_HANDLED; /* FUTURE: no change */
}
for (i = 0; i < 6; i++) {
ret = apc_write(APC_NEXTVAL);
if (ret != 1) {
upslog_with_errno(LOG_ERR, "setvar_enum: apc_write failed");
return STAT_SET_FAILED;
}
/* this should return either OK (if rotated) or NO (if not) */
ret = apc_read(temp, sizeof(temp), SER_AA);
if ((ret < 1) || (!strcmp(temp, "NA")))
return STAT_SET_FAILED;
/* sanity checks */
if (!strcmp(temp, "NO"))
return STAT_SET_FAILED;
if (strcmp(temp, "OK"))
return STAT_SET_FAILED;
/* see what it rotated onto */
ret = apc_write(vt->cmd);
if (ret != 1) {
upslog_with_errno(LOG_ERR, "setvar_enum: apc_write failed");
return STAT_SET_FAILED;
}
ret = apc_read(temp, sizeof(temp), SER_AA);
if ((ret < 1) || (!strcmp(temp, "NA")))
return STAT_SET_FAILED;
ptr = convert_data(vt, temp);
upsdebugx(1, "rotate value: got [%s], want [%s]",
ptr, val);
if (!strcmp(ptr, val)) { /* got it */
upslogx(LOG_INFO, "SET %s='%s'", vt->name, val);
/* refresh data from the hardware */
poll_data(vt);
/* query_ups(vt->name, 0); */
return STAT_SET_HANDLED; /* FUTURE: success */
}
/* check for wraparound */
if (!strcmp(ptr, orig)) {
upslogx(LOG_ERR, "setvar: variable %s wrapped",
vt->name);
return STAT_SET_FAILED;
}
}
upslogx(LOG_ERR, "setvar: gave up after 6 tries for %s",
vt->name);
/* refresh data from the hardware */
poll_data(vt);
/* query_ups(vt->name, 0); */
return STAT_SET_HANDLED;
}
static int setvar_string(apc_vartab_t *vt, const char *val)
{
unsigned int i;
int ret;
char temp[APC_LBUF], *ptr;
/* sanitize length */
if (strlen(val) > APC_STRLEN) {
upslogx(LOG_ERR, "setvar_string: value (%s) too long", val);
return STAT_SET_FAILED;
}
apc_flush(SER_AA);
ret = apc_write(vt->cmd);
if (ret != 1) {
upslog_with_errno(LOG_ERR, "setvar_string: apc_write failed");
return STAT_SET_FAILED;
}
ret = apc_read(temp, sizeof(temp), SER_AA);
if ((ret < 1) || (!strcmp(temp, "NA")))
return STAT_SET_FAILED;
/* suppress redundant changes - easier on the eeprom */
if (!strcmp(temp, val)) {
upslogx(LOG_INFO, "ignoring string SET %s='%s' (unchanged value)",
vt->name, val);
return STAT_SET_HANDLED; /* FUTURE: no change */
}
/* length sanitized above */
temp[0] = APC_NEXTVAL;
strcpy(temp + 1, val);
ptr = temp + strlen(temp);
for (i = strlen(val); i < APC_STRLEN; i++)
*ptr++ = '\015'; /* pad with CRs */
*ptr = 0;
ret = apc_write_long(temp);
if (ret != APC_STRLEN + 1) {
upslog_with_errno(LOG_ERR, "setvar_string: apc_write_long failed");
return STAT_SET_FAILED;
}
ret = apc_read(temp, sizeof(temp), SER_AA);
if (ret < 1) {
upslogx(LOG_ERR, "setvar_string: short final read");
return STAT_SET_FAILED;
}
if (!strcmp(temp, "NO")) {
upslogx(LOG_ERR, "setvar_string: got NO at final read");
return STAT_SET_FAILED;
}
/* refresh data from the hardware */
poll_data(vt);
/* query_ups(vt->name, 0); */
upslogx(LOG_INFO, "SET %s='%s'", vt->name, val);
return STAT_SET_HANDLED; /* FUTURE: success */
}
static int setvar(const char *varname, const char *val)
{
apc_vartab_t *vt;
vt = vartab_lookup_name(varname);
if (!vt)
return STAT_SET_UNKNOWN;
if ((vt->flags & APC_RW) == 0) {
upslogx(LOG_WARNING, "setvar: [%s] is not writable", varname);
return STAT_SET_UNKNOWN;
}
if (vt->flags & APC_ENUM)
return setvar_enum(vt, val);
if (vt->flags & APC_STRING)
return setvar_string(vt, val);
upslogx(LOG_WARNING, "setvar: Unknown type for [%s]", varname);
return STAT_SET_UNKNOWN;
}
/* load on */
static int do_loadon(void)
{
int ret;
apc_flush(0);
upsdebugx(1, "issuing load-on command");
ret = apc_write_rep(APC_CMD_ON);
if (ret < 0) {
upslog_with_errno(LOG_ERR, "do_loadon: apc_write_rep failed");
return STAT_INSTCMD_FAILED;
}
/*
* ups will not reply anything after this command, but might
* generate brief OVER condition (which will be corrected on
* the next status update)
*/
upsdebugx(1, "load-on command (apc:^N) executed");
return STAT_INSTCMD_HANDLED;
}
/* actually send the instcmd's char to the ups */
static int do_cmd(const apc_cmdtab_t *ct)
{
int ret;
char temp[APC_LBUF];
const char *strerr;
apc_flush(SER_AA);
if (ct->flags & APC_REPEAT) {
ret = apc_write_rep(ct->cmd);
strerr = "apc_write_rep";
} else {
ret = apc_write(ct->cmd);
strerr = "apc_write";
}
if (ret < 1) {
upslog_with_errno(LOG_ERR, "do_cmd: %s failed", strerr);
return STAT_INSTCMD_FAILED;
}
ret = apc_read(temp, sizeof(temp), SER_AA);
if (ret < 1)
return STAT_INSTCMD_FAILED;
if (strcmp(temp, "OK")) {
upslogx(LOG_WARNING, "got [%s] after command [%s]",
temp, ct->name);
return STAT_INSTCMD_FAILED;
}
upslogx(LOG_INFO, "command: %s", ct->name);
return STAT_INSTCMD_HANDLED;
}
/* some commands must be repeated in a window to execute */
static int instcmd_chktime(apc_cmdtab_t *ct, const char *ext)
{
double elapsed;
time_t now;
static time_t last = 0;
time(&now);
elapsed = difftime(now, last);
last = now;
/* you have to hit this in a small window or it fails */
if ((elapsed < MINCMDTIME) || (elapsed > MAXCMDTIME)) {
upsdebugx(1, "instcmd_chktime: outside window for [%s %s] (%2.0f)",
ct->name, ext ? ext : "\b", elapsed);
return 0;
}
return 1;
}
static int instcmd(const char *cmd, const char *ext)
{
int i;
apc_cmdtab_t *ct = NULL;
for (i = 0; apc_cmdtab[i].name != NULL; i++) {
/* main command must match */
if (strcasecmp(apc_cmdtab[i].name, cmd))
continue;
/* extra was provided - check it */
if (ext && *ext) {
if (!apc_cmdtab[i].ext)
continue;
if (strlen(apc_cmdtab[i].ext) > 2) {
if (rexhlp(apc_cmdtab[i].ext, ext))
continue;
} else {
if (strcasecmp(apc_cmdtab[i].ext, ext))
continue;
}
} else if (apc_cmdtab[i].ext)
continue;
ct = &apc_cmdtab[i];
break;
}
if (!ct) {
upslogx(LOG_WARNING, "instcmd: unknown command [%s %s]", cmd,
ext ? ext : "\b");
return STAT_INSTCMD_INVALID;
}
if (!(ct->flags & APC_PRESENT)) {
upslogx(LOG_WARNING, "instcmd: command [%s %s] recognized, but"
" not supported by your UPS model", cmd,
ext ? ext : "\b");
return STAT_INSTCMD_INVALID;
}
/* first verify if the command is "nasty" */
if ((ct->flags & APC_NASTY) && !instcmd_chktime(ct, ext))
return STAT_INSTCMD_HANDLED; /* future: again */
/* we're good to go, handle special stuff first, then generic cmd */
if (!strcasecmp(cmd, "calibrate.start"))
return do_cal(1);
if (!strcasecmp(cmd, "calibrate.stop"))
return do_cal(0);
if (!strcasecmp(cmd, "load.on"))
return do_loadon();
if (!strcasecmp(cmd, "load.off"))
return sdcmd_Z(0);
if (!strcasecmp(cmd, "shutdown.stayoff"))
return sdcmd_K(0);
if (!strcasecmp(cmd, "shutdown.return")) {
if (!ext || !*ext)
return sdcmd_S(0);
/* ext length is guaranteed by regex match above */
if (!strncasecmp(ext, "at", 2))
return sdcmd_AT(ext + 3);
if (!strncasecmp(ext, "cs", 2))
return sdcmd_CS(0);
}
/* nothing special here */
return do_cmd(ct);
}
/* install pointers to functions for msg handlers called from msgparse */
static void setuphandlers(void)
{
upsh.setvar = setvar;
upsh.instcmd = instcmd;
}
/* functions that interface with main.c */
void upsdrv_makevartable(void)
{
addvar(VAR_VALUE, "cable", "specify alternate cable (940-0095B)");
addvar(VAR_VALUE, "awd", "hard hibernate's additional wakeup delay");
addvar(VAR_VALUE, "sdtype", "specify simple shutdown method (0 - " APC_SDMAX ")");
addvar(VAR_VALUE, "advorder", "enable advanced shutdown control");
}
void upsdrv_initups(void)
{
size_t i, len;
char *val;
upsfd = extrafd = ser_open(device_path);
apc_ser_set();
/* sanitize awd (additional waekup delay of '@' command) */
if ((val = getval("awd")) && rexhlp(APC_AWDFMT, val)) {
fatalx(EXIT_FAILURE, "invalid value (%s) for option 'awd'", val);
}
/* sanitize sdtype */
if ((val = getval("sdtype")) && rexhlp(APC_SDFMT, val)) {
fatalx(EXIT_FAILURE, "invalid value (%s) for option 'sdtype'", val);
}
/* sanitize advorder */
if ((val = getval("advorder")) && strcasecmp(val, "no")) {
len = strlen(val);
if (!len || len > SDCNT)
fatalx(EXIT_FAILURE, "invalid length of 'advorder' option (%s)", val);
for (i = 0; i < len; i++) {
if (val[i] < '0' || val[i] >= '0' + SDCNT) {
fatalx(EXIT_FAILURE, "invalid characters in 'advorder' option (%s)", val);
}
}
}
}
void upsdrv_cleanup(void)
{
char temp[APC_LBUF];
apc_flush(0);
/* try to bring the UPS out of smart mode */
apc_write(APC_GODUMB);
apc_read(temp, sizeof(temp), SER_TO);
ser_close(upsfd, device_path);
}
void upsdrv_help(void)
{
}
void upsdrv_initinfo(void)
{
const char *pmod, *pser;
if (!smartmode(5)) {
fatalx(EXIT_FAILURE,
"unable to detect an APC Smart protocol UPS on port %s\n"
"check the cabling, port name or model name and try again", device_path
);
}
/* manufacturer ID - hardcoded in this particular module */
dstate_setinfo("ups.mfr", "APC");
getbaseinfo();
if (!(pmod = dstate_getinfo("ups.model")))
pmod = "\"unknown model\"";
if (!(pser = dstate_getinfo("ups.serial")))
pser = "unknown serial";
upsdebugx(1, "detected %s [%s] on %s", pmod, pser, device_path);
setuphandlers();
}
void upsdrv_updateinfo(void)
{
static int last_worked = 0;
static time_t last_full = 0;
time_t now;
/* try to wake up a dead ups once in awhile */
if (dstate_is_stale()) {
if (!last_worked)
upsdebugx(LOG_DEBUG, "upsdrv_updateinfo: comm lost");
/* reset this so a full update runs when the UPS returns */
last_full = 0;
if (++last_worked < 10)
return;
/* become aggressive after a few tries */
upsdebugx(LOG_DEBUG, "upsdrv_updateinfo: nudging ups with 'Y', iteration #%d ...", last_worked);
if (!smartmode(1))
return;
last_worked = 0;
}
if (!update_status())
return;
time(&now);
/* refresh all variables hourly */
/* does not catch measure-ups II insertion/removal */
if (difftime(now, last_full) > 3600) {
last_full = now;
update_info_all();
return;
}
update_info_normal();
}
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