*/
#ifndef lint
-static char rcsid[] = "$Id: main.c,v 1.77 1999/04/28 02:45:44 paulus Exp $";
+static char rcsid[] = "$Id: main.c,v 1.78 1999/05/12 06:19:47 paulus Exp $";
#endif
#include <stdio.h>
#include "cbcp.h"
#endif
-#if defined(SUNOS4)
-extern char *strerror();
-#endif
-
#ifdef IPX_CHANGE
#include "ipxcp.h"
#endif /* IPX_CHANGE */
int privileged; /* we're running as real uid root */
int need_holdoff; /* need holdoff period before restarting */
int detached; /* have detached from terminal */
-int log_to_fd; /* send log messages to this fd too */
+struct stat devstat; /* result of stat() on devnam */
+int prepass = 0; /* doing prepass to find device name */
+volatile int status; /* exit status for pppd */
static int fd_ppp = -1; /* fd for talking PPP */
static int fd_loop; /* fd for getting demand-dial packets */
static int got_sigchld; /* set if we have received a SIGCHLD */
static int locked; /* lock() has succeeded */
+static int privopen; /* don't lock, open device as root */
char *no_ppp_msg = "Sorry - this system lacks PPP kernel support\n";
struct timeval now;
phase = PHASE_INITIALIZE;
- log_to_fd = -1;
/*
* Ensure that fds 0, 1, 2 are open, to /dev/null if nowhere else.
progname = *argv;
+ prepass = 0;
if (!options_from_file(_PATH_SYSOPTIONS, !privileged, 0, 1)
|| !options_from_user())
- exit(1);
- using_pty = notty || ptycommand != NULL;
- scan_args(argc-1, argv+1); /* look for tty name on command line */
+ exit(EXIT_OPTION_ERROR);
+
+ /* scan command line and options files to find device name */
+ prepass = 1;
+ parse_args(argc-1, argv+1);
+ prepass = 0;
/*
* Work out the device name, if it hasn't already been specified.
*/
- if (!using_pty) {
- p = isatty(0)? ttyname(0): NULL;
- if (p != NULL) {
- if (default_device)
- strlcpy(devnam, p, sizeof(devnam));
- else if (strcmp(devnam, p) == 0)
- default_device = 1;
+ using_pty = notty || ptycommand != NULL;
+ if (!using_pty && default_device) {
+ char *p;
+ if (!isatty(0) || (p = ttyname(0)) == NULL) {
+ option_error("no device specified and stdin is not a tty");
+ exit(EXIT_OPTION_ERROR);
}
+ strlcpy(devnam, p, sizeof(devnam));
+ if (stat(devnam, &devstat) < 0)
+ fatal("Couldn't stat default device %s: %m", devnam);
}
/*
* Parse the tty options file and the command line.
+ * The per-tty options file should not change
+ * ptycommand, notty or devnam.
*/
- if (!options_for_tty()
- || !parse_args(argc-1, argv+1))
- exit(1);
+ if (!using_pty) {
+ int save_defdev = default_device;
+
+ default_device = 1;
+ if (!options_for_tty())
+ exit(EXIT_OPTION_ERROR);
+ if (notty || ptycommand != NULL) {
+ option_error("%s option may not be used in per-tty options file",
+ notty? "notty": "pty");
+ exit(EXIT_OPTION_ERROR);
+ }
+ if (!default_device) {
+ option_error("per-tty options file may not specify device name");
+ exit(EXIT_OPTION_ERROR);
+ }
+ default_device = save_defdev;
+ }
+
+ if (!parse_args(argc-1, argv+1))
+ exit(EXIT_OPTION_ERROR);
/*
* Check that we are running as root.
if (geteuid() != 0) {
option_error("must be root to run %s, since it is not setuid-root",
argv[0]);
- exit(1);
+ exit(EXIT_NOT_ROOT);
}
if (!ppp_available()) {
option_error(no_ppp_msg);
- exit(1);
+ exit(EXIT_NO_KERNEL_SUPPORT);
}
/*
* Check that the options given are valid and consistent.
*/
if (!sys_check_options())
- exit(1);
+ exit(EXIT_OPTION_ERROR);
auth_check_options();
for (i = 0; (protp = protocols[i]) != NULL; ++i)
if (protp->check_options != NULL)
(*protp->check_options)();
if (demand && connector == 0) {
option_error("connect script is required for demand-dialling\n");
- exit(1);
+ exit(EXIT_OPTION_ERROR);
}
if (using_pty) {
if (!default_device) {
option_error("%s option precludes specifying device name",
notty? "notty": "pty");
- exit(1);
+ exit(EXIT_OPTION_ERROR);
}
if (ptycommand != NULL && notty) {
option_error("pty option is incompatible with notty option");
- exit(1);
+ exit(EXIT_OPTION_ERROR);
}
default_device = notty;
lockflag = 0;
modem = 0;
+ if (notty && log_to_fd <= 1)
+ log_to_fd = -1;
} else {
- if (devnam[0] == 0) {
- option_error("no device specified and stdin is not a tty");
- exit(1);
+ /*
+ * If the user has specified a device which is the same as
+ * the one on stdin, pretend they didn't specify any.
+ * If the device is already open read/write on stdin,
+ * we assume we don't need to lock it, and we can open it as root.
+ */
+ if (fstat(0, &statbuf) >= 0 && S_ISCHR(statbuf.st_mode)
+ && statbuf.st_rdev == devstat.st_rdev) {
+ default_device = 1;
+ fdflags = fcntl(0, F_GETFL);
+ if (fdflags != -1 && (fdflags & O_ACCMODE) == O_RDWR)
+ privopen = 1;
}
}
if (default_device)
nodetach = 1;
- else
- log_to_fd = 1; /* default to stdout */
+
+ /*
+ * Don't send log messages to the serial port, it tends to
+ * confuse the peer. :-)
+ */
+ if (log_to_fd >= 0 && fstat(log_to_fd, &statbuf) >= 0
+ && S_ISCHR(statbuf.st_mode) && statbuf.st_rdev == devstat.st_rdev)
+ log_to_fd = -1;
script_setenv("DEVICE", devnam);
need_holdoff = 1;
ttyfd = -1;
real_ttyfd = -1;
+ status = EXIT_OK;
if (demand) {
/*
if (ptycommand != NULL || notty || record_file != NULL) {
if (!get_pty(&pty_master, &pty_slave, ppp_devnam, uid)) {
error("Couldn't allocate pseudo-tty");
+ status = EXIT_FATAL_ERROR;
goto fail;
}
set_up_tty(pty_slave, 1);
/*
* Lock the device if we've been asked to.
*/
- if (lockflag && !default_device) {
+ status = EXIT_LOCK_FAILED;
+ if (lockflag && !privopen) {
if (lock(devnam) < 0)
goto fail;
locked = 1;
/* If the user specified the device name, become the
user before opening it. */
int err;
- if (!devnam_info.priv && !default_device)
+ if (!devnam_info.priv && !privopen)
seteuid(uid);
ttyfd = open(devnam, O_NONBLOCK | O_RDWR, 0);
err = errno;
- if (!devnam_info.priv && !default_device)
+ if (!devnam_info.priv && !privopen)
seteuid(0);
if (ttyfd >= 0)
break;
errno = err;
- if (err != EINTR)
+ if (err != EINTR) {
error("Failed to open %s: %m", devnam);
+ status = EXIT_OPEN_FAILED;
+ }
if (!persist || err != EINTR)
goto fail;
}
* If the notty and/or record option was specified,
* start up the character shunt now.
*/
+ status = EXIT_PTYCMD_FAILED;
if (ptycommand != NULL) {
if (record_file != NULL) {
int ipipe[2], opipe[2], ok;
if (device_script(connector, ttyfd, ttyfd, 0) < 0) {
error("Connect script failed");
+ status = EXIT_CONNECT_FAILED;
goto fail;
}
if (kill_link)
for (;;) {
if ((i = open(devnam, O_RDWR)) >= 0)
break;
- if (errno != EINTR)
+ if (errno != EINTR) {
error("Failed to reopen %s: %m", devnam);
+ status = EXIT_OPEN_FAILED;
+ }
if (!persist || errno != EINTR || hungup || kill_link)
goto fail;
}
/* set up the serial device as a ppp interface */
fd_ppp = establish_ppp(ttyfd);
- if (fd_ppp < 0)
+ if (fd_ppp < 0) {
+ status = EXIT_FATAL_ERROR;
goto disconnect;
+ }
if (!demand) {
lcp_open(0); /* Start protocol */
open_ccp_flag = 0;
add_fd(fd_ppp);
+ status = EXIT_NEGOTIATION_FAILED;
for (phase = PHASE_ESTABLISH; phase != PHASE_DEAD; ) {
if (sigsetjmp(sigjmp, 1) == 0) {
sigprocmask(SIG_BLOCK, &mask, NULL);
reap_kids(1);
}
- die(0);
+ die(status);
return 0;
}
if (len == 0) {
notice("Modem hangup");
hungup = 1;
+ status = EXIT_HANGUP;
lcp_lowerdown(0); /* serial link is no longer available */
link_terminated(0);
return;
{
info("Hangup (SIGHUP)");
kill_link = 1;
+ if (status != EXIT_HANGUP)
+ status = EXIT_USER_REQUEST;
if (conn_running)
/* Send the signal to the [dis]connector process(es) also */
kill_my_pg(sig);
info("Terminating on signal %d.", sig);
persist = 0; /* don't try to restart */
kill_link = 1;
+ status = EXIT_USER_REQUEST;
if (conn_running)
/* Send the signal to the [dis]connector process(es) also */
kill_my_pg(sig);
kill_my_pg(SIGTERM);
if (charshunt_pid)
kill(charshunt_pid, SIGTERM);
- die(1);
+ die(127);
}
projects / ppp.git / blobdiff