258 lines
6.2 KiB
C
258 lines
6.2 KiB
C
/*****************************************************************************
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*
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* Purpose ...............: mbtask - mode portlists
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*
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*****************************************************************************
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* Copyright (C) 1997-2011
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*
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* Michiel Broek FIDO: 2:280/2802
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* Beekmansbos 10
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* 1971 BV IJmuiden
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* the Netherlands
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*
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* This file is part of MBSE BBS.
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*
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* This BBS is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2, or (at your option) any
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* later version.
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*
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* MBSE BBS is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with MBSE BBS; see the file COPYING. If not, write to the Free
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* Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
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*****************************************************************************/
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#include "../config.h"
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#include "../lib/mbselib.h"
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#include "taskutil.h"
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#include "../lib/nodelist.h"
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#include "ports.h"
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#ifndef LOCKDIR
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#if defined(__FreeBSD__) || defined(__NetBSD__) || defined(__OpenBSD__)
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#define LOCKDIR "/var/spool/lock"
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#else
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#define LOCKDIR "/var/lock"
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#endif
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#endif
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#define LCKPREFIX LOCKDIR"/LCK.."
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#define LCKTMP LOCKDIR"/TMP."
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extern char ttyfn[]; /* TTY file name */
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extern time_t tty_time; /* TTY update time */
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extern int rescan; /* Master rescan flag */
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pp_list *pl = NULL; /* Portlist */
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int pots_lines = 0; /* POTS (Modem) lines */
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int isdn_lines = 0; /* ISDN lines */
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int pots_free = 0; /* POTS (Modem) lines free */
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int isdn_free = 0; /* ISDN lines free */
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/*
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* Tidy the portlist
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*/
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void tidy_portlist(pp_list **);
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void tidy_portlist(pp_list ** fdp)
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{
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pp_list *tmp, *old;
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for (tmp = *fdp; tmp; tmp = old) {
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old = tmp->next;
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free(tmp);
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}
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*fdp = NULL;
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}
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/*
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* Add a port to the portlist
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*/
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void fill_portlist(pp_list **, pp_list *);
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void fill_portlist(pp_list **fdp, pp_list *new)
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{
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pp_list *tmp, *ta;
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tmp = (pp_list *)malloc(sizeof(pp_list));
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memset(tmp, 0, sizeof(tmp));
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tmp->next = NULL;
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strncpy(tmp->tty, new->tty, 6);
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tmp->mflags = new->mflags;
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tmp->dflags = new->dflags;
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tmp->locktime = 0;
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if (*fdp == NULL) {
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*fdp = tmp;
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} else {
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for (ta = *fdp; ta; ta = ta->next)
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if (ta->next == NULL) {
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ta->next = (pp_list *)tmp;
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break;
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}
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}
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}
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/*
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* Build a list of available dialout ports.
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*/
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void load_ports()
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{
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FILE *fp;
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pp_list new;
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char *p, *q, *capflags = NULL;
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nodelist_modem **tmpm;
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tidy_portlist(&pl);
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if ((fp = fopen(ttyfn, "r")) == NULL) {
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Syslog('?', "$Can't open %s", ttyfn);
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return;
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}
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fread(&ttyinfohdr, sizeof(ttyinfohdr), 1, fp);
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pots_lines = isdn_lines = 0;
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while (fread(&ttyinfo, ttyinfohdr.recsize, 1, fp) == 1) {
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if (((ttyinfo.type == POTS) || (ttyinfo.type == ISDN)) && (ttyinfo.available) && (ttyinfo.callout)) {
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if (ttyinfo.type == POTS)
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pots_lines++;
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if (ttyinfo.type == ISDN)
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isdn_lines++;
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memset(&new, 0, sizeof(new));
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strncpy(new.tty, ttyinfo.tty, 6);
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capflags = xstrcpy((char *)"flags:");
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q = xstrcpy(ttyinfo.flags);
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for (p = q; p; p = q) {
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if ((q = strchr(p, ',')))
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*q++ = '\0';
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if (strncasecmp(p, "U", 1) || (strlen(p) != 1)) {
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for (tmpm = &nl_pots; *tmpm; tmpm=&((*tmpm)->next))
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if (strcasecmp(p, (*tmpm)->name) == 0) {
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new.mflags |= (*tmpm)->value;
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capflags = xstrcat(capflags, (char *)" ");
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capflags = xstrcat(capflags, (*tmpm)->name);
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}
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for (tmpm = &nl_isdn; *tmpm; tmpm=&((*tmpm)->next))
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if (strcasecmp(p, (*tmpm)->name) == 0) {
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new.dflags |= (*tmpm)->value;
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capflags = xstrcat(capflags, (char *)" ");
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capflags = xstrcat(capflags, (*tmpm)->name);
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}
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}
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}
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free(q);
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Syslog('+', "Found line %s, %s", new.tty, capflags);
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fill_portlist(&pl, &new);
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if (capflags)
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free(capflags);
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capflags = NULL;
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}
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}
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fclose(fp);
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tty_time = file_time(ttyfn);
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if (pots_lines || isdn_lines)
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Syslog('+', "Detected %d modem port%s and %d ISDN port%s",
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pots_lines, (pots_lines == 1)?"":"s", isdn_lines, (isdn_lines == 1)?"":"s");
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}
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void unload_ports()
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{
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tidy_portlist(&pl);
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}
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/*
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* Check status of all modem/ISDN ports.
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* If something is changed set the master rescan flag.
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*/
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void check_ports(void)
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{
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pp_list *tpl;
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char *lckname, *progname;
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FILE *lf;
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int tmppid, changed = FALSE;
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pid_t rempid = 0;
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pots_free = isdn_free = 0;
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lckname = calloc(PATH_MAX, sizeof(char));
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for (tpl = pl; tpl; tpl = tpl->next) {
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snprintf(lckname, PATH_MAX, "%s%s", LCKPREFIX, tpl->tty);
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if ((lf = fopen(lckname, "r")) == NULL) {
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if (tpl->locked) {
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tpl->locked = 0;
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Syslog('+', "Port %s is now free after %d seconds", tpl->tty, tpl->locktime);
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if (tpl->locktime > 4)
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/*
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* Good, set master rescan flag if longer then 4 seconds locked.
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*/
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changed = TRUE;
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}
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} else {
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fscanf(lf, "%d", &tmppid);
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rempid = tmppid;
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fclose(lf);
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if (kill(rempid, 0) && (errno == ESRCH)) {
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Syslog('+', "Stale lockfile for %s, unlink", tpl->tty);
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unlink(lckname);
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changed = TRUE;
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} else {
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if (!tpl->locked) {
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tpl->locked = rempid;
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tpl->locktime = 0;
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progname = calloc(PATH_MAX, sizeof(char));
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if (pid2prog(rempid, progname, PATH_MAX) == 0)
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Syslog('+', "Port %s locked, pid %d (%s)", tpl->tty, rempid, progname);
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else
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Syslog('+', "Port %s locked, pid %d", tpl->tty, rempid);
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free(progname);
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} else {
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/*
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* Count locktime
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*/
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tpl->locktime++;
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if (tpl->locktime == 5) {
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changed = TRUE;
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Syslog('+', "Port %s locked for 5 seconds, forcing scan", tpl->tty);
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}
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}
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}
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}
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/*
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* Now count free ports
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*/
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if (tpl->mflags && !tpl->locked)
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pots_free++;
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if (tpl->dflags && !tpl->locked)
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isdn_free++;
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if (changed) {
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rescan = TRUE;
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Syslog('p', "Free ports: pots=%d isdn=%d", pots_free, isdn_free);
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}
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}
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free(lckname);
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}
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