X-Git-Url: https://git.ozlabs.org/?p=ppp.git;a=blobdiff_plain;f=pppd%2Fmain.c;h=1e1397e5505353f79bfba97228807e57c8fd3a1b;hp=1bf5d07ed803a6ac30e5680a752ba893568b4243;hb=8b68d87ded16c7d100748ee2bf2156e19f99da6e;hpb=c653cf125719e9814dc6b921d61d32b483c8695a diff --git a/pppd/main.c b/pppd/main.c index 1bf5d07..1e1397e 100644 --- a/pppd/main.c +++ b/pppd/main.c @@ -18,18 +18,20 @@ */ #ifndef lint -static char rcsid[] = "$Id: main.c,v 1.9 1994/05/09 02:40:21 paulus Exp $"; +static char rcsid[] = "$Id: main.c,v 1.13 1994/05/27 01:02:14 paulus Exp $"; #endif #define SETSID #include +#include #include #include #include #include #include #include +#include #include /* @@ -37,11 +39,7 @@ static char rcsid[] = "$Id: main.c,v 1.9 1994/05/09 02:40:21 paulus Exp $"; * /etc/ppp/options exists. */ #ifndef REQ_SYSOPTIONS -#define REQ_SYSOPTIONS 0 -#endif - -#ifdef STREAMS -#undef SGTTY +#define REQ_SYSOPTIONS 1 #endif #ifdef SGTTY @@ -58,18 +56,9 @@ static char rcsid[] = "$Id: main.c,v 1.9 1994/05/09 02:40:21 paulus Exp $"; #include #include #include - -#include "callout.h" - #include -#include - -#include - -#ifndef BSD -#define BSD 43 -#endif /*BSD*/ +#include "callout.h" #include "ppp.h" #include "magic.h" #include "fsm.h" @@ -105,10 +94,11 @@ char *progname; /* Name of this program */ char hostname[MAXNAMELEN]; /* Our hostname */ char our_name[MAXNAMELEN]; char remote_name[MAXNAMELEN]; +static char pidfilename[MAXPATHLEN]; static pid_t pid; /* Our pid */ static pid_t pgrpid; /* Process Group ID */ -static char pidfilename[MAXPATHLEN]; +uid_t uid; /* Our real user-id */ char devname[MAXPATHLEN] = "/dev/tty"; /* Device name */ int default_device = TRUE; /* use default device (stdin/out) */ @@ -158,11 +148,12 @@ int lockflag = 0; /* lock the serial device */ /* prototypes */ -static void hup __ARGS((int, int, struct sigcontext *, char *)); -static void intr __ARGS((int, int, struct sigcontext *, char *)); -static void term __ARGS((int, int, struct sigcontext *, char *)); -static void alrm __ARGS((int, int, struct sigcontext *, char *)); -static void io __ARGS((int, int, struct sigcontext *, char *)); +static void hup __ARGS((int)); +static void intr __ARGS((int)); +static void term __ARGS((int)); +static void alrm __ARGS((int)); +static void io __ARGS((int)); +static void chld __ARGS((int)); static void incdebug __ARGS((int)); static void nodebug __ARGS((int)); void establish_ppp __ARGS((void)); @@ -177,9 +168,7 @@ void format_packet __ARGS((u_char *, int, void (*) (void *, char *, ...), void *)); void pr_log __ARGS((void *, char *, ...)); -#ifdef STREAMS extern char *ttyname __ARGS((int)); -#endif extern char *getlogin __ARGS((void)); /* @@ -207,16 +196,15 @@ main(argc, argv) char *argv[]; { int mask, i; - struct sigvec sv; + struct sigaction sa; struct cmd *cmdp; FILE *pidfile; char *p; + struct passwd *pw; -#ifdef STREAMS - p = ttyname(fileno(stdin)); + p = ttyname(0); if (p) strcpy(devname, p); -#endif if (gethostname(hostname, MAXNAMELEN) < 0 ) { perror("couldn't get hostname"); @@ -225,6 +213,7 @@ main(argc, argv) hostname[MAXNAMELEN-1] = 0; pid = getpid(); + uid = getuid(); if (!ppp_available()) { fprintf(stderr, "Sorry - PPP is not available on this system\n"); @@ -241,21 +230,18 @@ main(argc, argv) progname = *argv; - if (!options_from_file(_PATH_SYSOPTIONS, REQ_SYSOPTIONS) || + if (!options_from_file(_PATH_SYSOPTIONS, REQ_SYSOPTIONS, 0) || !options_from_user() || - !parse_args(argc-1, argv+1)) + !parse_args(argc-1, argv+1) || + !options_for_tty()) die(1); check_auth_options(); setipdefault(); - if (lockflag && !default_device) - if (lock(devname) < 0) - die(1); - /* * Initialize syslog system and magic number package. */ -#if (BSD >= 43 || defined(sun)) && !defined(ultrix) +#if !defined(ultrix) openlog("pppd", LOG_PID | LOG_NDELAY, LOG_PPP); setlogmask(LOG_UPTO(LOG_INFO)); #else @@ -269,10 +255,15 @@ main(argc, argv) magic_init(); p = getlogin(); - if (p == NULL) - p = "(unknown)"; + if (p == NULL) { + pw = getpwuid(uid); + if (pw != NULL && pw->pw_name != NULL) + p = pw->pw_name; + else + p = "(unknown)"; + } syslog(LOG_NOTICE, "pppd %s.%d started by %s, uid %d", - VERSION, PATCHLEVEL, p, getuid()); + VERSION, PATCHLEVEL, p, uid); #ifdef SETSID /* @@ -321,6 +312,10 @@ main(argc, argv) } #endif + if (lockflag && !default_device) + if (lock(devname) < 0) + die(1); + /* Get an internet socket for doing socket ioctl's on. */ if ((s = socket(AF_INET, SOCK_DGRAM, 0)) < 0) { syslog(LOG_ERR, "socket : %m"); @@ -337,25 +332,27 @@ main(argc, argv) sigaddset(&mask, SIGINT); sigaddset(&mask, SIGALRM); sigaddset(&mask, SIGIO); + sigaddset(&mask, SIGCHLD); #ifdef STREAMS sigaddset(&mask, SIGPOLL); #endif #define SIGNAL(s, handler) { \ - sv.sv_handler = handler; \ - if (sigvec(s, &sv, NULL) < 0) { \ - syslog(LOG_ERR, "sigvec(%d): %m", s); \ + sa.sa_handler = handler; \ + if (sigaction(s, &sa, NULL) < 0) { \ + syslog(LOG_ERR, "sigaction(%d): %m", s); \ die(1); \ } \ } - sv.sv_mask = mask; - sv.sv_flags = 0; + sa.sa_mask = mask; + sa.sa_flags = 0; SIGNAL(SIGHUP, hup); /* Hangup */ SIGNAL(SIGINT, intr); /* Interrupt */ SIGNAL(SIGTERM, term); /* Terminate */ SIGNAL(SIGALRM, alrm); /* Timeout */ SIGNAL(SIGIO, io); /* Input available */ + SIGNAL(SIGCHLD, chld); /* Death of child process */ #ifdef STREAMS SIGNAL(SIGPOLL, io); /* Input available */ #endif @@ -465,6 +462,12 @@ main(argc, argv) syslog(LOG_ERR, "fcntl(F_GETFL): %m"); die(1); } + +#ifdef _linux_ /* This is a kludge for Linux. FIXME !!! -- later. */ +#undef FASYNC +#define FASYNC 0 +#endif + if (fcntl(fd, F_SETFL, FNDELAY | FASYNC) == -1) { syslog(LOG_ERR, "fcntl(F_SETFL, FNDELAY | FASYNC): %m"); die(1); @@ -478,10 +481,8 @@ main(argc, argv) sigprocmask(SIG_BLOCK, &mask, NULL); /* Block signals now */ lcp_lowerup(0); /* XXX Well, sort of... */ lcp_open(0); /* Start protocol */ - for (phase = PHASE_ESTABLISH; phase != PHASE_DEAD; ) { + for (phase = PHASE_ESTABLISH; phase != PHASE_DEAD; ) sigpause(0); /* Wait for next signal */ - reap_kids(); /* Don't leave dead kids lying around */ - } /* * Run disconnector script, if requested @@ -640,7 +641,7 @@ set_up_tty(fd, local) #ifdef CRTSCTS tios.c_cflag &= ~(CSIZE | CSTOPB | PARENB | CLOCAL | CRTSCTS); - if (crtscts) + if (crtscts == 1) tios.c_cflag |= CRTSCTS; #else tios.c_cflag &= ~(CSIZE | CSTOPB | PARENB | CLOCAL); @@ -654,6 +655,13 @@ set_up_tty(fd, local) tios.c_lflag = 0; tios.c_cc[VMIN] = 1; tios.c_cc[VTIME] = 0; + + if (crtscts == 2) { + tios.c_iflag |= IXOFF; + tios.c_cc[VSTOP] = 0x13; /* DC3 = XOFF = ^S */ + tios.c_cc[VSTART] = 0x11; /* DC1 = XON = ^Q */ + } + speed = translate_speed(inspeed); if (speed) { cfsetospeed(&tios, speed); @@ -757,6 +765,7 @@ cleanup(status, arg) if (initfdflags != -1 && fcntl(fd, F_SETFL, initfdflags) < 0) syslog(LOG_WARNING, "fcntl(F_SETFL, fdflags): %m"); + initfdflags = -1; disestablish_ppp(); @@ -771,7 +780,7 @@ cleanup(status, arg) } close(fd); - fd = 0; + fd = -1; } if (pidfilename[0] != 0 && unlink(pidfilename) < 0) @@ -941,12 +950,9 @@ adjtimeout() * * Indicates that the physical layer has been disconnected. */ -/*ARGSUSED*/ static void -hup(sig, code, scp, addr) - int sig, code; - struct sigcontext *scp; - char *addr; +hup(sig) + int sig; { syslog(LOG_INFO, "Hangup (SIGHUP)"); @@ -963,12 +969,9 @@ hup(sig, code, scp, addr) * * Indicates that we should initiate a graceful disconnect and exit. */ -/*ARGSUSED*/ static void -term(sig, code, scp, addr) - int sig, code; - struct sigcontext *scp; - char *addr; +term(sig) + int sig; { syslog(LOG_INFO, "Terminating link."); persist = 0; /* don't try to restart */ @@ -982,12 +985,9 @@ term(sig, code, scp, addr) * * Indicates that we should initiate a graceful disconnect and exit. */ -/*ARGSUSED*/ static void -intr(sig, code, scp, addr) - int sig, code; - struct sigcontext *scp; - char *addr; +intr(sig) + int sig; { syslog(LOG_INFO, "Interrupt received: terminating link"); persist = 0; /* don't try to restart */ @@ -1001,12 +1001,9 @@ intr(sig, code, scp, addr) * * Indicates a timeout. */ -/*ARGSUSED*/ static void -alrm(sig, code, scp, addr) - int sig, code; - struct sigcontext *scp; - char *addr; +alrm(sig) + int sig; { struct itimerval itv; struct callout *freep, *list, *last; @@ -1058,17 +1055,26 @@ alrm(sig, code, scp, addr) } +/* + * chld - Catch SIGCHLD signal. + * Calls reap_kids to get status for any dead kids. + */ +static void +chld(sig) + int sig; +{ + reap_kids(); +} + + /* * io - Catch SIGIO signal. * * Indicates that incoming data is available. */ -/*ARGSUSED*/ static void -io(sig, code, scp, addr) - int sig, code; - struct sigcontext *scp; - char *addr; +io(sig) + int sig; { int len, i; u_char *p; @@ -1080,25 +1086,6 @@ io(sig, code, scp, addr) MAINDEBUG((LOG_DEBUG, "IO signal received")); adjtimeout(); /* Adjust timeouts */ - /* we do this to see if the SIGIO handler is being invoked for input */ - /* ready, or for the socket buffer hitting the low-water mark. */ - - notime.tv_sec = 0; - notime.tv_usec = 0; - FD_ZERO(&fdset); - FD_SET(fd, &fdset); - - if ((ready = select(32, &fdset, (fd_set *) NULL, (fd_set *) NULL, - ¬ime)) == -1) { - syslog(LOG_ERR, "Error in io() select: %m"); - die(1); - } - - if (ready == 0) { - MAINDEBUG((LOG_DEBUG, "IO non-input ready SIGIO occured.")); - return; - } - /* Yup, this is for real */ for (;;) { /* Read all available packets */ p = inpacket_buf; /* point to beginning of packet buffer */ @@ -1108,8 +1095,9 @@ io(sig, code, scp, addr) return; if (len == 0) { - syslog(LOG_WARNING, "End of file on fd!"); - die(1); + MAINDEBUG((LOG_DEBUG, "End of file on fd!")); + lcp_lowerdown(0); + return; } if (debug /*&& (debugflags & DBG_INPACKET)*/)