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/* main.c - Network UPS Tools driver core
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Copyright (C) 1999 Russell Kroll <rkroll@exploits.org>
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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unsigned int sddelay = 90; /* wait 90 seconds for shutdown */
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const char *progname = NULL, *upsname = NULL;
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const char *device_name = NULL, *device_path = NULL;
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const char *statepath = NULL;
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int do_forceshutdown = 0;
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vartab_t *vartab_h = NULL;
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int experimental_driver = 0;
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/* stuff from upscommon */
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extern int do_lock_port;
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extern int use_init_fn; /* TODO: remove in the future */
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/* stuff from common */
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extern int upslog_flags;
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/* power down the attached load immediately */
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static void forceshutdown(void)
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upslogx(LOG_NOTICE, "Initiating UPS shutdown");
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printf("Initiating forced UPS shutdown!\n");
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printf("Waiting for poweroff...\n");
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printf("Hmm, did the shutdown fail? Oh well...\n");
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printf ("usage: %s [-h] [-a <id>] [-d <num>] [-k] [-x <var>=<val>] [<device>]\n",
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printf("Examples:\n");
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printf(" %s -a myups - new method: use ups.conf section myups\n",
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printf(" %s /dev/ttyS0 - old method: start up on port /dev/ttyS0\n",
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printf ("usage: %s [-h] [-a <id>] [-d <num>] [-k] [-x <var>=<val>] [<device>]\n",
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" -a <id> - autoconfig using ups.conf section <id>\n"
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" - note: -x options after -a override ups.conf settings\n"
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" -d <num> - wait <num> seconds after sending shutdown command\n"
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" -k - force shutdown\n"
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" -h - display this help\n"
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" -x <var>=<val> - set driver variable <var> to <val>\n"
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" - example: -x cable=940-0095B\n"
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" <device> - /dev entry corresponding to UPS port\n"
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" - Only optional when using -a!\n"
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printf ("Acceptable values for -x in this driver:\n\n");
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if (tmp->vartype == VAR_VALUE)
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printf("%40s : -x %s=<value>\n",
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printf("%40s : -x %s\n", tmp->desc, tmp->var);
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/* cram var [= <val>] data into storage */
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static void storeval(const char *var, char *val)
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vartab_t *tmp, *last;
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tmp = last = vartab_h;
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/* later definitions overwrite earlier ones */
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if (!strcasecmp(tmp->var, var)) {
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tmp->val = xstrdup(val);
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printf("Error: -x %s is not valid for this driver.\n\n", var);
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/* retrieve the value of variable <var> if possible */
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char *getval(const char *var)
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vartab_t *tmp = vartab_h;
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if (!strcasecmp(tmp->var, var))
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/* see if <var> has been defined, even if no value has been given to it */
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int testvar(const char *var)
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vartab_t *tmp = vartab_h;
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if (!strcasecmp(tmp->var, var))
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return 0; /* not found */
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/* callback from driver - create the table for -x/conf entries */
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void addvar(int vartype, const char *name, const char *desc)
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vartab_t *tmp, *last;
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tmp = last = vartab_h;
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tmp = xmalloc(sizeof(vartab_t));
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tmp->vartype = vartype;
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tmp->var = xstrdup(name);
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tmp->desc = xstrdup(desc);
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/* handle -x / ups.conf config details that are for this part of the code */
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static int main_arg(char *var, char *val)
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/* flags for main: just 'nolock' for now */
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if (!strcmp(var, "nolock")) {
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return 1; /* handled */
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/* any other flags are for the driver code */
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/* variables for main: port and sddelay */
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if (!strcmp(var, "port")) {
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device_path = xstrdup(val);
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device_name = xbasename(device_path);
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return 1; /* handled */
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if (!strcmp(var, "sddelay")) {
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return 1; /* handled */
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/* only for upsdrvctl - ignored here */
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if (!strcmp(var, "sdorder"))
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return 1; /* handled */
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return 0; /* unhandled, pass it through to the driver */
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void do_upsconf_args(char *confupsname, char *var, char *val)
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/* ignore global stuff in here */
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/* no match = not for us */
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if (strcmp(confupsname, upsname) != 0)
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if (main_arg(var, val))
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/* flags (no =) now get passed to the driver-level stuff */
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/* don't let the user shoot themselves in the foot */
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if (!strcmp(var, "driver")) {
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if (strcmp(val, progname) != 0)
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fatalx("Error: UPS [%s] is for driver %s, but I'm %s!\n",
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confupsname, val, progname);
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/* everything else must be for the driver */
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/* split -x foo=bar into 'foo' and 'bar' */
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static void splitxarg(char *inbuf)
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char *eqptr, *val, *buf;
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/* make our own copy - avoid changing argv */
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buf = xstrdup(inbuf);
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eqptr = strchr(buf, '=');
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/* see if main handles this first */
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if (main_arg(buf, val))
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/* otherwise store it for later */
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/* two pipes for two different sync points during startup */
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#define SERIALIZE_INIT 1
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#define SERIALIZE_SETM1 2
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#define SERIALIZE_SETM2 3
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#define SERIALIZE_WAITM1 4
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#define SERIALIZE_WAITM2 5
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void serialize(int op)
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static int pipe1[2], pipe2[2];
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fatal("serialize: pipe");
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fatal("serialize: pipe");
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case SERIALIZE_SETM1:
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case SERIALIZE_WAITM1:
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ret = read(pipe1[0], &ch, 1);
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case SERIALIZE_SETM2:
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case SERIALIZE_WAITM2:
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ret = read(pipe2[0], &ch, 1);
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static void runparent(void)
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/* allow the client to exit from its WAITM1 call */
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serialize(SERIALIZE_SETM1);
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/* wait for the client to call info_ready() and set M2 */
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serialize(SERIALIZE_WAITM2);
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/* special version to deal with the nasty sync issues in here */
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static void main_background(void)
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if ((pid = fork()) < 0)
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fatal("Unable to enter background");
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xbit_set(&upslog_flags, UPSLOG_SYSLOG);
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xbit_clear(&upslog_flags, UPSLOG_STDERR);
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/* make fds 0-2 point somewhere defined */
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if (open("/dev/null", O_RDWR) != 0)
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fatal("open /dev/null");
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setsid(); /* make a new session to dodge signals */
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/* wait until after parent closes the statefd */
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serialize(SERIALIZE_WAITM1);
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/* load up info with a full set of data */
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/* put the state file where it's supposed to be */
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/* let the parent exit now that we're ready to roll */
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serialize(SERIALIZE_SETM2);
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upslogx(LOG_INFO, "Startup successful");
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int main(int argc, char **argv)
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if (experimental_driver) {
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printf("Warning: This is an experimental driver.\n");
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printf("Some features may not function correctly.\n\n");
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progname = xbasename(argv[0]);
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openlog(progname, LOG_PID, LOG_FACILITY);
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if ((statepath = getenv("NUT_STATEPATH")) == NULL)
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statepath = STATEPATH;
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/* build the driver's extra (-x) variable table */
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upsdrv_makevartable();
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while ((i = getopt(argc, argv, "+a:d:kDhx:")) != EOF) {
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sddelay = atoi(optarg);
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do_forceshutdown = 1;
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printf("Network UPS Tools (%s)\n", UPS_VERSION);
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/* we need to get the port from somewhere */
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fprintf(stderr, "Error: You must specify a port name in ups.conf or on the command line.\n");
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/* allow argv to override the ups.conf entry if specified */
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device_path = argv[0];
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device_name = xbasename(device_path);
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snprintf(statefn, sizeof(statefn), "%s/%s-%s",
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statepath, progname, device_name);
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pidfn = xmalloc(SMALLBUF);
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snprintf(pidfn, SMALLBUF, "%s/%s-%s.pid",
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ALTPIDPATH, progname, device_name);
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upsdebugx(1, "debug level is '%d'", nut_debug_level);
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if (do_forceshutdown)
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if (chdir(statepath))
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fatal("Can't chdir to %s", statepath);
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/* TODO: remove when all old drivers are dead */
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create_info(upsdrv_infomax(), shmok);
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if (nut_debug_level == 0) {
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serialize(SERIALIZE_INIT);
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/* no sync to worry about, so rename it and get going */
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upslogx(LOG_DEBUG, "Received a message from upsd");
added
removed
models/main.c
