/* * main.c - Point-to-Point Protocol main module * * Copyright (c) 1989 Carnegie Mellon University. * All rights reserved. * * Redistribution and use in source and binary forms are permitted * provided that the above copyright notice and this paragraph are * duplicated in all such forms and that any documentation, * advertising materials, and other materials related to such * distribution and use acknowledge that the software was developed * by Carnegie Mellon University. The name of the * University may not be used to endorse or promote products derived * from this software without specific prior written permission. * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE. */ /*#ifndef lint /* static char rcsid[] = "$Id$"; */ #endif */ #include #include /* #include */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include /* #include */ #include "pppd.h" #include "magic.h" #include "fsm.h" #include "lcp.h" #include "ipcp.h" #include "upap.h" #include "chap.h" #include "ccp.h" #include "pathnames.h" #include "patchlevel.h" #ifdef CBCP_SUPPORT #include "cbcp.h" #endif #if defined(SUNOS4) extern char *strerror(); #endif #ifdef IPX_CHANGE #include "ipxcp.h" #endif /* IPX_CHANGE */ #ifdef AT_CHANGE #include "atcp.h" #endif void SetStatusInfo(int state, char * text, int res); /* interface vars */ char ifname[32]; /* Interface name */ int interfunit; /* Interface unit number */ char *progname; /* Name of this program */ char hostname[MAXNAMELEN] = "infotel"; /* Our hostname */ static char default_devnam[MAXPATHLEN]; /* name of default device */ /*static pid_t pid; */ /* Our pid */ static uid_t uid; /* Our real user-id */ static int conn_running; /* we have a [dis]connector running */ int ttyfd = -1; /* Serial port file descriptor */ mode_t tty_mode = -1; /* Original access permissions to tty */ int baud_rate; /* Actual bits/second for serial device */ int hungup; /* terminal has been hung up */ int privileged; /* we're running as real uid root */ int need_holdoff; /* need holdoff period before restarting */ int detached; /* have detached from terminal */ int phase; /* where the link is at */ int kill_link; int open_ccp_flag; char **script_env; /* Env. variable values for scripts */ int s_env_nalloc; /* # words avail at script_env */ u_char outpacket_buf[PPP_MRU + PPP_HDRLEN]; /* buffer for outgoing packet */ u_char inpacket_buf[PPP_MRU + PPP_HDRLEN]; /* buffer for incoming packet */ char *no_ppp_msg = "lack of PPP\n"; /* Prototypes for procedures local to this file. */ static void cleanup(void); static void create_pidfile __P((void)); static void close_tty __P((void)); static void get_input __P((void)); static void calltimeout __P((void)); static struct timeval *timeleft __P((struct timeval *)); static void holdoff_end __P((void *)); static int device_script __P((char *[], int, int)); static void reap_kids __P((void)); static void pr_log __P((void *, char *,...)); extern char *ttyname __P((int)); extern char *getlogin __P((void)); int main __P((int, char *[])); /* * PPP Data Link Layer "protocol" table. * One entry per supported protocol. * The last entry must be NULL. */ struct protent *protocols[] = { &lcp_protent, &pap_protent, &chap_protent, #ifdef CBCP_SUPPORT &cbcp_protent, #endif &ipcp_protent, &ccp_protent, #ifdef IPX_CHANGE &ipxcp_protent, #endif #ifdef AT_CHANGE &atcp_protent, #endif NULL }; extern int connect_stb(); extern int disconnect_stb(); extern struct in_addr rtems_bsdnet_nameserver[]; extern int rtems_bsdnet_nameserver_count; extern int __res_init(void); int pppdmain(argc, argv) int argc; char *argv[]; { int i; struct timeval timo; struct protent *protp; struct stat statbuf; char t[100]; phase = PHASE_INITIALIZE; strcpy(default_devnam, "/dev/modem"); strcpy(devnam, "/dev/modem"); script_env = NULL; /* if (gethostname(hostname, MAXNAMELEN) < 0 ) { die(1); } */ hostname[MAXNAMELEN - 1] = 0; uid = 0; privileged = uid == 0; /* * Initialize to the standard option set, then parse, in order, * the system options file, the user's options file, * the tty's options file, and the command line arguments. */ for (i = 0; (protp = protocols[i]) != NULL; ++i) (*protp->init) (0); if (!ppp_available()) { exit(1); } /* * Check that the options given are valid and consistent. */ sys_check_options(); auth_check_options(); for (i = 0; (protp = protocols[i]) != NULL; ++i) if (protp->check_options != NULL) (*protp->check_options) (); /* * If the user has specified the default device name explicitly, * pretend they hadn't. */ if (!default_device && strcmp(devnam, default_devnam) == 0) default_device = 1; if (default_device) nodetach = 1; /* * Initialize system-dependent stuff and magic number package. */ sys_init(); magic_init(); /* * Detach ourselves from the terminal, if required, * and identify who is running us. */ /* syslog(LOG_NOTICE, "pppd %s.%d%s started by %s, uid %d", VERSION, PATCHLEVEL, IMPLEMENTATION, p, uid); */ for (;;) { /* !!! here should be done some kind of synchronization - I did it following way ... */ /* GlobalSystemStatus is set of different things shared between different tasks ... */ #if 0 /* XXX PPPConfiguration */ GlobalSystemStatus * volatile stat; stat=LockSTBSystemParam(); stat->ConnectionStatus = NotConnected; UnlockSTBSystemParam(); #endif while (1) { rtems_event_set events; int status; #if 0 /* XXX PPPConfiguration */ stat=LockSTBSystemParam(); status=stat->WantConnection; UnlockSTBSystemParam(); if (status == Connect) break; #endif rtems_event_receive(RTEMS_EVENT_1, RTEMS_WAIT | RTEMS_EVENT_ANY, RTEMS_NO_TIMEOUT, &events); } #if 0 /* XXX PPPConfiguration */ stat=LockSTBSystemParam(); /* stat->WantConnection=DontConnect; */ stat->ConnectionStatus = Connecting; /* Here you can change default nameserver ... */ rtems_bsdnet_nameserver[0].s_addr=inet_addr(stat->DNS); rtems_bsdnet_nameserver_count=1; UnlockSTBSystemParam(); #endif /* initialize DNS services here */ SetStatusInfo(0, "Connecting...",0); __res_init(); /* * Open the serial device and set it up to be the ppp interface. * First we open it in non-blocking mode so we can set the * various termios flags appropriately. If we aren't dialling * out and we want to use the modem lines, we reopen it later * in order to wait for the carrier detect signal from the modem. */ while ((ttyfd = open(devnam, O_NONBLOCK | O_RDWR, 0)) < 0) { if (errno != EINTR) syslog(LOG_ERR, "Failed to open %s: %m", devnam); if (!persist || errno != EINTR) goto fail; } hungup = 0; kill_link = 0; /* * Do the equivalent of `mesg n' to stop broadcast messages. */ tty_mode = statbuf.st_mode; /* run connection script */ /* * Set line speed, flow control, etc. * On most systems we set CLOCAL for now so that we can talk * to the modem before carrier comes up. But this has the * side effect that we might miss it if CD drops before we * get to clear CLOCAL below. On systems where we can talk * successfully to the modem with CLOCAL clear and CD down, * we can clear CLOCAL at this point. */ set_up_tty(ttyfd, 1); /* drop dtr to hang up in case modem is off hook */ setdtr(ttyfd, FALSE); sleep(1); setdtr(ttyfd, TRUE); { /* Make a call ... */ #if 0 /* XXX PPPConfiguration */ char t[100]; stat=LockSTBSystemParam(); sprintf(t,"Dzwonię pod numer %s ...",stat->Phone_Number); UnlockSTBSystemParam(); #endif SetStatusInfo(0, t,0); } if ((i=connect_script(ttyfd)) >0) { /* here go error messages ... */ static char *error_msgs[]={ "Bad script", "IO Error" "Timeout", "Busy", "No dialtone", "No carrier", "No answer", "No answer from server" }; setdtr(ttyfd, FALSE); sprintf(t,"Communication error: %s",error_msgs[i-1]); syslog(LOG_ERR, "Connect script failed"); SetStatusInfo(0, t,1); goto fail; } else if (i<0) { char t[100]; sprintf(t,"Łączenie z Internetem z prędkoscią %d baud...",-i); SetStatusInfo(0, t,0); } else SetStatusInfo(0, "Łączenie z Internetem...",0); syslog(LOG_INFO, "Serial connection established."); sleep(1); /* give it time to set up its terminal */ /* set line speed, flow control, etc.; clear CLOCAL if modem option */ set_up_tty(ttyfd, 0); /* reopen tty if necessary to wait for carrier */ /* run welcome script, if any */ /* if (welcomer && welcomer[0]) { if (device_script(welcomer, 21, ttyfd) < 0) syslog(LOG_WARNING, "Welcome script failed"); } */ /* set up the serial device as a ppp interface */ establish_ppp(ttyfd); /* syslog(LOG_INFO, "Using interface ppp%d", interfunit); */ (void) sprintf(ifname, "ppp%d", interfunit); /* * Start opening the connection and wait for * incoming events (reply, timeout, etc.). */ /* syslog(LOG_NOTICE, "Connect: %s <--> %s", ifname, devnam); */ rtems_bsdnet_semaphore_obtain(); lcp_lowerup(0); lcp_open(0); /* Start protocol */ rtems_bsdnet_semaphore_release(); SetStatusInfo(0, "Połączenie z Internetem nawiązane.",1); for (phase = PHASE_ESTABLISH; phase != PHASE_DEAD;) { wait_input(timeleft(&timo)); calltimeout(); get_input(); #if 0 /* XXX PPPConfiguration */ stat=LockSTBSystemParam(); if (stat->WantConnection==DontConnect) { stat->ConnectionStatus = NotConnected; SetStatusInfo(0, "Rozłączam się ...",0); lcp_close(0, ""); kill_link = 0; } UnlockSTBSystemParam(); #endif if (open_ccp_flag) { if (phase == PHASE_NETWORK) { ccp_fsm[0].flags = OPT_RESTART; /* clears OPT_SILENT */ (*ccp_protent.open) (0); } open_ccp_flag = 0; } } /* * If we may want to bring the link up again, transfer * the ppp unit back to the loopback. Set the * real serial device back to its normal mode of operation. */ clean_check(); disestablish_ppp(ttyfd); SetStatusInfo(0, "Połączenie z Internetem zerwane.",1); /* * Run disconnector script, if requested. * XXX we may not be able to do this if the line has hung up! */ /* if (disconnector && !hungup) { set_up_tty(ttyfd, 1); if (device_script(disconnector, ttyfd, ttyfd) < 0) { syslog(LOG_WARNING, "disconnect script failed"); } else { syslog(LOG_INFO, "Serial link disconnected."); } } */ fail: #if 0 /* XXX PPPConfiguration */ stat=LockSTBSystemParam(); stat->ConnectionStatus = NotConnected; stat->WantConnection=DontConnect; UnlockSTBSystemParam(); #endif if (ttyfd >= 0) close_tty(); } return 0; } /* * detach - detach us from the controlling terminal. */ void detach() { } /* * holdoff_end - called via a timeout when the holdoff period ends. */ static void holdoff_end(arg) void *arg; { phase = PHASE_DORMANT; } /* * get_input - called when incoming data is available. */ static void get_input() { int len, i; u_char *p; u_short protocol; struct protent *protp; p = inpacket_buf; /* point to beginning of packet buffer */ len = read_packet(inpacket_buf); if (len < 0) return; if (len == 0) { #if 0 /* XXX PPPConfiguration */ GlobalSystemStatus * volatile stat; #endif /* syslog(LOG_NOTICE, "Modem hangup"); */ hungup = 1; #if 0 /* XXX PPPConfiguration */ stat=LockSTBSystemParam(); stat->ConnectionStatus = NotConnected; UnlockSTBSystemParam(); #endif lcp_lowerdown(0); /* serial link is no longer available */ link_terminated(0); return; } /* if ((debug)) log_packet(p, len, "rcvd ", LOG_DEBUG); */ if (len < PPP_HDRLEN) { /* if (debug) MAINDEBUG((LOG_INFO, "io(): Received short packet.")); */ return; } /* We need to modify internal network structures here */ rtems_bsdnet_semaphore_obtain(); p += 2; /* Skip address and control */ GETSHORT(protocol, p); len -= PPP_HDRLEN; /* * Toss all non-LCP packets unless LCP is OPEN. */ if (protocol != PPP_LCP && lcp_fsm[0].state != OPENED) { MAINDEBUG((LOG_INFO, "get_input: Received non-LCP packet when LCP not open.")); rtems_bsdnet_semaphore_release(); return; } /* * Until we get past the authentication phase, toss all packets * except LCP, LQR and authentication packets. */ if (phase <= PHASE_AUTHENTICATE && !(protocol == PPP_LCP || protocol == PPP_LQR || protocol == PPP_PAP || protocol == PPP_CHAP)) { rtems_bsdnet_semaphore_release(); return; } /* * Upcall the proper protocol input routine. */ for (i = 0; (protp = protocols[i]) != NULL; ++i) { if (protp->protocol == protocol && protp->enabled_flag) { (*protp->input) (0, p, len); rtems_bsdnet_semaphore_release(); return; } if (protocol == (protp->protocol & ~0x8000) && protp->enabled_flag && protp->datainput != NULL) { (*protp->datainput) (0, p, len); rtems_bsdnet_semaphore_release(); return; } } lcp_sprotrej(0, p - PPP_HDRLEN, len + PPP_HDRLEN); rtems_bsdnet_semaphore_release(); } /* * quit - Clean up state and exit (with an error indication). */ void quit() { die(1); } /* * die - like quit, except we can specify an exit status. */ void die(status) int status; { cleanup(); } /* * cleanup - restore anything which needs to be restored before we exit */ /* ARGSUSED */ static void cleanup() { sys_cleanup(); if (ttyfd >= 0) close_tty(); } /* * close_tty - restore the terminal device and close it. */ static void close_tty() { disestablish_ppp(ttyfd); /* drop dtr to hang up */ setdtr(ttyfd, FALSE); /* * This sleep is in case the serial port has CLOCAL set by default, * and consequently will reassert DTR when we close the device. */ sleep(1); restore_tty(ttyfd); close(ttyfd); ttyfd = -1; } struct callout { struct timeval c_time; void *c_arg; void (*c_func) __P((void *)); struct callout *c_next; }; static struct callout *callout = NULL; static struct timeval timenow; /* * timeout - Schedule a timeout. * * Note that this timeout takes the number of seconds, NOT hz (as in * the kernel). */ void my_timeout(func, arg, time) void (*func) __P((void *)); void *arg; int time; { struct callout *newp, *p, **pp; MAINDEBUG((LOG_DEBUG, "Timeout %lx:%lx in %d seconds.", (long) func, (long) arg, time)); /* * Allocate timeout. */ if ((newp = (struct callout *) malloc(sizeof(struct callout))) == NULL) { /* syslog(LOG_ERR, "Out of memory in timeout()!"); */ die(1); } newp->c_arg = arg; newp->c_func = func; gettimeofday(&timenow, NULL); newp->c_time.tv_sec = timenow.tv_sec + time; newp->c_time.tv_usec = timenow.tv_usec; /* * Find correct place and link it in. */ for (pp = &callout; (p = *pp); pp = &p->c_next) if (newp->c_time.tv_sec < p->c_time.tv_sec || (newp->c_time.tv_sec == p->c_time.tv_sec && newp->c_time.tv_usec < p->c_time.tv_sec)) break; newp->c_next = p; *pp = newp; } /* * untimeout - Unschedule a timeout. */ void untimeout(func, arg) void (*func) __P((void *)); void *arg; { struct callout **copp, *freep; MAINDEBUG((LOG_DEBUG, "Untimeout %lx:%lx.", (long) func, (long) arg)); for (copp = &callout; (freep = *copp); copp = &freep->c_next) if (freep->c_func == func && freep->c_arg == arg) { *copp = freep->c_next; (void) free((char *) freep); break; } } /* * calltimeout - Call any timeout routines which are now due. */ static void calltimeout() { struct callout *p; while (callout != NULL) { p = callout; if (gettimeofday(&timenow, NULL) < 0) { die(1); } if (!(p->c_time.tv_sec < timenow.tv_sec || (p->c_time.tv_sec == timenow.tv_sec && p->c_time.tv_usec <= timenow.tv_usec))) break; /* no, it's not time yet */ callout = p->c_next; (*p->c_func) (p->c_arg); free((char *) p); } } /* * timeleft - return the length of time until the next timeout is due. */ static struct timeval * timeleft(tvp) struct timeval *tvp; { if (callout == NULL) return NULL; gettimeofday(&timenow, NULL); tvp->tv_sec = callout->c_time.tv_sec - timenow.tv_sec; tvp->tv_usec = callout->c_time.tv_usec - timenow.tv_usec; if (tvp->tv_usec < 0) { tvp->tv_usec += 1000000; tvp->tv_sec -= 1; } if (tvp->tv_sec < 0) tvp->tv_sec = tvp->tv_usec = 0; return tvp; } /* * term - Catch SIGTERM signal and SIGINT signal (^C/del). * * Indicates that we should initiate a graceful disconnect and exit. */ static void term(sig) int sig; { /* persist = 0; *//* don't try to restart */ kill_link = 1; } static int input_fd, output_fd; #include extern int modem_fd; int connect_script(int fd) { int status; char program[256]; #if 0 /* XXX PPPConfiguration */ GlobalSystemStatus * volatile stat; #endif /* Connect scripts are almost the same as in Linux Chat ... */ static char *scripts[] = { "TIMEOUT@5@@\rAT@OK-+++\\c-OK@ATH0@TIMEOUT@90@OK@ATDT%s@CONNECT@", "TIMEOUT@5@@\rAT@OK-+++\\c-OK@ATH0@TIMEOUT@90@OK@ATDT%s@CONNECT@@ppp@@Username:@%s@Password:@%s@" }; modem_fd = fd; #if 0 /* XXX PPPConfiguration */ stat=LockSTBSystemParam(); if (strcmp("",stat->PPP_User)) { stat->provider=Poland_TPSA; } else stat->provider=DumbLogin; switch (stat->provider) { case Poland_TPSA: sprintf(program, scripts[1], stat->Phone_Number, stat->PPP_User, stat->PPP_Password); break; default: sprintf(program, scripts[0], stat->Phone_Number); } UnlockSTBSystemParam(); #endif conn_running = 0; return chatmain(program); } /* * run-program - execute a program with given arguments, * but don't wait for it. * If the program can't be executed, logs an error unless * must_exist is 0 and the program file doesn't exist. */ int run_program(prog, args, must_exist) char *prog; char **args; int must_exist; { return 0; } /* * reap_kids - get status from any dead child processes, * and log a message for abnormal terminations. */ static void reap_kids() { } /* * log_packet - format a packet and log it. */ char line[256]; char *linep; /*#define log_packet(p, len, prefix, level) */ void log_packet(p, len, prefix, level) u_char *p; int len; char *prefix; int level; { strcpy(line, prefix); linep = line + strlen(line); /* format_packet(p, len, pr_log, NULL); */ /* if (linep != line) syslog(level, "%s", line); */ } /* * format_packet - make a readable representation of a packet, * calling `printer(arg, format, ...)' to output it. */ /*#define format_packet(p, len, printer, arg) */ void format_packet(p, len, printer, arg) u_char *p; int len; void (*printer) __P((void *, char *,...)); void *arg; { /* int i, n; u_short proto; struct protent *protp; if (len >= PPP_HDRLEN && p[0] == PPP_ALLSTATIONS && p[1] == PPP_UI) { p += 2; GETSHORT(proto, p); len -= PPP_HDRLEN; for (i = 0; (protp = protocols[i]) != NULL; ++i) if (proto == protp->protocol) break; if (protp != NULL) { printer(arg, "[%s", protp->name); n = (*protp->printpkt) (p, len, printer, arg); printer(arg, "]"); p += n; len -= n; } else { printer(arg, "[proto=0x%x]", proto); } } */ /* for (; len > 0; --len) { GETCHAR(x, p); printer(arg, " %.2x", x); } */ } static void pr_log __V((void *arg, char *fmt,...)) { int n; va_list pvar; char buf[256]; #if __STDC__ va_start(pvar, fmt); #else void *arg; char *fmt; va_start(pvar); arg = va_arg(pvar, void *); fmt = va_arg(pvar, char *); #endif n = vfmtmsg(buf, sizeof(buf), fmt, pvar); va_end(pvar); if (linep + n + 1 > line + sizeof(line)) { /* syslog(LOG_DEBUG, "%s", line); */ linep = line; } strcpy(linep, buf); linep += n; } /* * print_string - print a readable representation of a string using * printer. */ /*#define print_string(p, len, printer, arg) */ void print_string(p, len, printer, arg) char *p; int len; void (*printer) __P((void *, char *,...)); void *arg; { int c; printer(arg, "\""); for (; len > 0; --len) { c = *p++; if (' ' <= c && c <= '~') { if (c == '\\' || c == '"') printer(arg, "\\"); printer(arg, "%c", c); } else { switch (c) { case '\n': printer(arg, "\\n"); break; case '\r': printer(arg, "\\r"); break; case '\t': printer(arg, "\\t"); break; default: printer(arg, "\\%.3o", c); } } } printer(arg, "\""); } /* * novm - log an error message saying we ran out of memory, and die. */ void novm(msg) char *msg; { /* syslog(LOG_ERR, "Virtual memory exhausted allocating %s\n", msg); */ die(1); } /* * fmtmsg - format a message into a buffer. Like sprintf except we * also specify the length of the output buffer, and we handle * %r (recursive format), %m (error message) and %I (IP address) formats. * Doesn't do floating-point formats. * Returns the number of chars put into buf. */ int fmtmsg __V((char *buf, int buflen, char *fmt,...)) { va_list args; int n; #if __STDC__ va_start(args, fmt); #else char *buf; int buflen; char *fmt; va_start(args); buf = va_arg(args, char *); buflen = va_arg(args, int); fmt = va_arg(args, char *); #endif n = vfmtmsg(buf, buflen, fmt, args); va_end(args); return n; } /* * vfmtmsg - like fmtmsg, takes a va_list instead of a list of args. */ #define OUTCHAR(c) (buflen > 0? (--buflen, *buf++ = (c)): 0) /*#define vfmtmsg(buf, buflen, fmt, args) */ int vfmtmsg(buf, buflen, fmt, args) char *buf; int buflen; char *fmt; va_list args; { /* int c, i, n; int width, prec, fillch; int base, len, neg, quoted; unsigned long val = 0; char *str, *f, *buf0; unsigned char *p; char num[32]; time_t t; static char hexchars[] = "0123456789abcdef"; buf0 = buf; --buflen; while (buflen > 0) { for (f = fmt; *f != '%' && *f != 0; ++f) ; if (f > fmt) { len = f - fmt; if (len > buflen) len = buflen; memcpy(buf, fmt, len); buf += len; buflen -= len; fmt = f; } if (*fmt == 0) break; c = *++fmt; width = prec = 0; fillch = ' '; if (c == '0') { fillch = '0'; c = *++fmt; } if (c == '*') { width = va_arg(args, int); c = *++fmt; } else { while (isdigit(c)) { width = width * 10 + c - '0'; c = *++fmt; } } if (c == '.') { c = *++fmt; if (c == '*') { prec = va_arg(args, int); c = *++fmt; } else { while (isdigit(c)) { prec = prec * 10 + c - '0'; c = *++fmt; } } } str = 0; base = 0; neg = 0; ++fmt; switch (c) { case 'd': i = va_arg(args, int); if (i < 0) { neg = 1; val = -i; } else val = i; base = 10; break; case 'o': val = va_arg(args, unsigned int); base = 8; break; case 'x': val = va_arg(args, unsigned int); base = 16; break; case 'p': val = (unsigned long) va_arg(args, void *); base = 16; neg = 2; break; case 's': str = va_arg(args, char *); break; case 'c': num[0] = va_arg(args, int); num[1] = 0; str = num; break; case 'm': str = strerror(errno); break; case 'I': str = ip_ntoa(va_arg(args, u_int32_t)); break; case 'r': f = va_arg(args, char *); #ifndef __powerpc__ n = vfmtmsg(buf, buflen + 1, f, va_arg(args, va_list)); #else n = vfmtmsg(buf, buflen + 1, f, va_arg(args, void *)); #endif buf += n; buflen -= n; continue; case 't': break; case 'v': case 'q': quoted = c == 'q'; p = va_arg(args, unsigned char *); if (fillch == '0' && prec > 0) { n = prec; } else { n = strlen((char *)p); if (prec > 0 && prec < n) n = prec; } while (n > 0 && buflen > 0) { c = *p++; --n; if (!quoted && c >= 0x80) { OUTCHAR('M'); OUTCHAR('-'); c -= 0x80; } if (quoted && (c == '"' || c == '\\')) OUTCHAR('\\'); if (c < 0x20 || (0x7f <= c && c < 0xa0)) { if (quoted) { OUTCHAR('\\'); switch (c) { case '\t': OUTCHAR('t'); break; case '\n': OUTCHAR('n'); break; case '\b': OUTCHAR('b'); break; case '\f': OUTCHAR('f'); break; default: OUTCHAR('x'); OUTCHAR(hexchars[c >> 4]); OUTCHAR(hexchars[c & 0xf]); } } else { if (c == '\t') OUTCHAR(c); else { OUTCHAR('^'); OUTCHAR(c ^ 0x40); } } } else OUTCHAR(c); } continue; default: *buf++ = '%'; if (c != '%') --fmt; --buflen; continue; } if (base != 0) { str = num + sizeof(num); *--str = 0; while (str > num + neg) { *--str = hexchars[val % base]; val = val / base; if (--prec <= 0 && val == 0) break; } switch (neg) { case 1: *--str = '-'; break; case 2: *--str = 'x'; *--str = '0'; break; } len = num + sizeof(num) - 1 - str; } else { len = strlen(str); if (prec > 0 && len > prec) len = prec; } if (width > 0) { if (width > buflen) width = buflen; if ((n = width - len) > 0) { buflen -= n; for (; n > 0; --n) *buf++ = fillch; } } if (len > buflen) len = buflen; memcpy(buf, str, len); buf += len; buflen -= len; } *buf = 0; return buf - buf0; */ return 0; } /* * script_setenv - set an environment variable value to be used * for scripts that we run (e.g. ip-up, auth-up, etc.) */ #define script_setenv(var, value) /* void script_setenv(var, value) char *var, *value; { int vl = strlen(var); int i; char *p, *newstring; newstring = (char *) malloc(vl + strlen(value) + 2); if (newstring == 0) return; strcpy(newstring, var); newstring[vl] = '='; strcpy(newstring+vl+1, value); if (script_env != 0) { for (i = 0; (p = script_env[i]) != 0; ++i) { if (strncmp(p, var, vl) == 0 && p[vl] == '=') { free(p); script_env[i] = newstring; return; } } } else { i = 0; script_env = (char **) malloc(16 * sizeof(char *)); if (script_env == 0) return; s_env_nalloc = 16; } if (i + 1 >= s_env_nalloc) { int new_n = i + 17; char **newenv = (char **) realloc((void *)script_env, new_n * sizeof(char *)); if (newenv == 0) return; script_env = newenv; s_env_nalloc = new_n; } script_env[i] = newstring; script_env[i+1] = 0; } *//* * script_unsetenv - remove a variable from the environment * for scripts. */ #define script_unsetenv(var) /* void script_unsetenv(var) char *var; { int vl = strlen(var); int i; char *p; if (script_env == 0) return; for (i = 0; (p = script_env[i]) != 0; ++i) { if (strncmp(p, var, vl) == 0 && p[vl] == '=') { free(p); while ((script_env[i] = script_env[i+1]) != 0) ++i; break; } } } */