X-Git-Url: http://git.ozlabs.org/?p=ppp.git;a=blobdiff_plain;f=pppd%2Fmain.c;h=d278b071d95b3bbc40f13423de2e6db26db8a6bd;hp=2c7d5265cf2bb5b4421463b44134f3ab9a63e1a9;hb=dee72905271845128ad26cff5cf770c433f3f4a7;hpb=f52db44405c7cc9620701eda20889dc6743f8437 diff --git a/pppd/main.c b/pppd/main.c index 2c7d526..d278b07 100644 --- a/pppd/main.c +++ b/pppd/main.c @@ -18,7 +18,7 @@ */ #ifndef lint -static char rcsid[] = "$Id: main.c,v 1.25 1995/07/11 06:40:58 paulus Exp $"; +static char rcsid[] = "$Id: main.c,v 1.28 1995/10/27 03:41:01 paulus Exp $"; #endif #include @@ -77,37 +77,32 @@ int phase; /* where the link is at */ int kill_link; int open_ccp_flag; -static int initfdflags = -1; /* Initial file descriptor flags */ - u_char outpacket_buf[PPP_MRU+PPP_HDRLEN]; /* buffer for outgoing packet */ static u_char inpacket_buf[PPP_MRU+PPP_HDRLEN]; /* buffer for incoming packet */ int hungup; /* terminal has been hung up */ static int n_children; /* # child processes still running */ -int baud_rate; +int baud_rate; /* Actual bits/second for serial device */ + +char *no_ppp_msg = "Sorry - this system lacks PPP kernel support\n"; -/* prototypes */ +/* Prototypes for procedures local to this file. */ + +static void cleanup __P((void)); +static void close_fd __P((void)); +static void get_input __P((void)); +static void calltimeout __P((void)); +static struct timeval *timeleft __P((struct timeval *)); static void hup __P((int)); static void term __P((int)); static void chld __P((int)); static void toggle_debug __P((int)); static void open_ccp __P((int)); - -static void get_input __P((void)); -void establish_ppp __P((void)); -void calltimeout __P((void)); -struct timeval *timeleft __P((struct timeval *)); -void reap_kids __P((void)); -void cleanup __P((int, caddr_t)); -void close_fd __P((void)); -void die __P((int)); -void novm __P((char *)); - -void log_packet __P((u_char *, int, char *)); -void format_packet __P((u_char *, int, - void (*) (void *, char *, ...), void *)); -void pr_log __P((void *, char *, ...)); +static void bad_signal __P((int)); +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)); @@ -148,7 +143,7 @@ main(argc, argv) int argc; char *argv[]; { - int i, nonblock; + int i, nonblock, fdflags; struct sigaction sa; struct cmd *cmdp; FILE *pidfile; @@ -171,7 +166,7 @@ main(argc, argv) uid = getuid(); if (!ppp_available()) { - fprintf(stderr, "Sorry - PPP is not available on this system\n"); + fprintf(stderr, no_ppp_msg); exit(1); } @@ -252,8 +247,47 @@ main(argc, argv) SIGNAL(SIGTERM, term); /* Terminate */ SIGNAL(SIGCHLD, chld); - signal(SIGUSR1, toggle_debug); /* Toggle debug flag */ - signal(SIGUSR2, open_ccp); /* Reopen CCP */ + SIGNAL(SIGUSR1, toggle_debug); /* Toggle debug flag */ + SIGNAL(SIGUSR2, open_ccp); /* Reopen CCP */ + + /* + * Install a handler for other signals which would otherwise + * cause pppd to exit without cleaning up. + */ + SIGNAL(SIGABRT, bad_signal); + SIGNAL(SIGALRM, bad_signal); + SIGNAL(SIGFPE, bad_signal); + SIGNAL(SIGILL, bad_signal); + SIGNAL(SIGPIPE, bad_signal); + SIGNAL(SIGQUIT, bad_signal); + SIGNAL(SIGSEGV, bad_signal); +#ifdef SIGBUS + SIGNAL(SIGBUS, bad_signal); +#endif +#ifdef SIGEMT + SIGNAL(SIGEMT, bad_signal); +#endif +#ifdef SIGPOLL + SIGNAL(SIGPOLL, bad_signal); +#endif +#ifdef SIGPROF + SIGNAL(SIGPROF, bad_signal); +#endif +#ifdef SIGSYS + SIGNAL(SIGSYS, bad_signal); +#endif +#ifdef SIGTRAP + SIGNAL(SIGTRAP, bad_signal); +#endif +#ifdef SIGVTALRM + SIGNAL(SIGVTALRM, bad_signal); +#endif +#ifdef SIGXCPU + SIGNAL(SIGXCPU, bad_signal); +#endif +#ifdef SIGXFSZ + SIGNAL(SIGXFSZ, bad_signal); +#endif /* * Lock the device if we've been asked to. @@ -275,13 +309,11 @@ main(argc, argv) syslog(LOG_ERR, "Failed to open %s: %m", devnam); die(1); } - if ((initfdflags = fcntl(fd, F_GETFL)) == -1) { - syslog(LOG_ERR, "Couldn't get device fd flags: %m"); - die(1); - } if (nonblock) { - initfdflags &= ~O_NONBLOCK; - fcntl(fd, F_SETFL, initfdflags); + if ((fdflags = fcntl(fd, F_GETFL)) == -1 + || fcntl(fd, F_SETFL, fdflags & ~O_NONBLOCK) < 0) + syslog(LOG_WARNING, + "Couldn't reset non-blocking mode on device: %m"); } hungup = 0; kill_link = 0; @@ -329,14 +361,6 @@ main(argc, argv) pidfilename[0] = 0; } - /* - * Set device for non-blocking reads. - */ - if (fcntl(fd, F_SETFL, initfdflags | O_NONBLOCK) == -1) { - syslog(LOG_ERR, "Couldn't set device to non-blocking mode: %m"); - die(1); - } - /* * Block all signals, start opening the connection, and wait for * incoming events (reply, timeout, etc.). @@ -364,11 +388,8 @@ main(argc, argv) /* * Run disconnector script, if requested. - * First we need to reset non-blocking mode. * XXX we may not be able to do this if the line has hung up! */ - if (initfdflags != -1 && fcntl(fd, F_SETFL, initfdflags) >= 0) - initfdflags = -1; disestablish_ppp(); if (disconnector) { set_up_tty(fd, 1); @@ -410,7 +431,7 @@ get_input() syslog(LOG_NOTICE, "Modem hangup"); hungup = 1; lcp_lowerdown(0); /* serial link is no longer available */ - phase = PHASE_DEAD; + link_terminated(0); return; } @@ -475,19 +496,18 @@ demuxprotrej(unit, protocol) return; } - syslog(LOG_WARNING, - "demuxprotrej: Unrecognized Protocol-Reject for protocol 0x%x", + syslog(LOG_WARNING, "Unrecognized Protocol-Reject for protocol 0x%x", protocol); } /* - * quit - Clean up state and exit. + * quit - Clean up state and exit (with an error indication). */ void quit() { - die(0); + die(1); } /* @@ -497,7 +517,7 @@ void die(status) int status; { - cleanup(0, NULL); + cleanup(); syslog(LOG_INFO, "Exit."); exit(status); } @@ -506,11 +526,11 @@ die(status) * cleanup - restore anything which needs to be restored before we exit */ /* ARGSUSED */ -void -cleanup(status, arg) - int status; - caddr_t arg; +static void +cleanup() { + sys_cleanup(); + if (fd >= 0) close_fd(); @@ -525,7 +545,7 @@ cleanup(status, arg) /* * close_fd - restore the terminal device and close it. */ -void +static void close_fd() { disestablish_ppp(); @@ -534,10 +554,6 @@ close_fd() if (modem) setdtr(fd, FALSE); - if (initfdflags != -1 && fcntl(fd, F_SETFL, initfdflags) < 0) - syslog(LOG_WARNING, "Couldn't restore device fd flags: %m"); - initfdflags = -1; - restore_tty(); close(fd); @@ -627,7 +643,7 @@ untimeout(func, arg) /* * calltimeout - Call any timeout routines which are now due. */ -void +static void calltimeout() { struct callout *p; @@ -655,7 +671,7 @@ calltimeout() /* * timeleft - return the length of time until the next timeout is due. */ -struct timeval * +static struct timeval * timeleft(tvp) struct timeval *tvp; { @@ -749,11 +765,23 @@ open_ccp(sig) } +/* + * bad_signal - We've caught a fatal signal. Clean up state and exit. + */ +static void +bad_signal(sig) + int sig; +{ + syslog(LOG_ERR, "Fatal signal %d", sig); + die(1); +} + + /* * device_script - run a program to connect or disconnect the * serial device. */ -int +static int device_script(program, in, out) char *program; int in, out; @@ -867,7 +895,7 @@ run_program(prog, args, must_exist) * reap_kids - get status from any dead child processes, * and log a message for abnormal terminations. */ -void +static void reap_kids() { int pid, status; @@ -951,7 +979,7 @@ format_packet(p, len, printer, arg) #ifdef __STDC__ #include -void +static void pr_log(void *arg, char *fmt, ...) { int n; @@ -974,7 +1002,7 @@ pr_log(void *arg, char *fmt, ...) #else /* __STDC__ */ #include -void +static void pr_log(arg, fmt, va_alist) void *arg; char *fmt;