* WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
*/
-#ifndef lint
-static char rcsid[] = "$Id: main.c,v 1.74 1999/04/12 06:24:46 paulus Exp $";
-#endif
+#define RCSID "$Id: main.c,v 1.83 1999/08/13 06:46:15 paulus Exp $"
#include <stdio.h>
#include <ctype.h>
#include "cbcp.h"
#endif
-#if defined(SUNOS4)
-extern char *strerror();
-#endif
-
#ifdef IPX_CHANGE
#include "ipxcp.h"
#endif /* IPX_CHANGE */
#include "atcp.h"
#endif
+static const char rcsid[] = RCSID;
+
/* interface vars */
char ifname[32]; /* Interface name */
int ifunit; /* Interface unit number */
char *progname; /* Name of this program */
char hostname[MAXNAMELEN]; /* Our hostname */
static char pidfilename[MAXPATHLEN]; /* name of pid file */
+static char linkpidfile[MAXPATHLEN]; /* name of linkname pid file */
static char ppp_devnam[MAXPATHLEN]; /* name of PPP tty (maybe ttypx) */
-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 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 */
+int devnam_fixed; /* set while in options.ttyxx file */
+volatile int status; /* exit status for pppd */
+int unsuccess; /* # unsuccessful connection attempts */
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";
static struct timeval start_time; /* Time when link was started. */
struct pppd_stats link_stats;
+int link_connect_time;
int link_stats_valid;
static int charshunt_pid; /* Process ID for charshunt */
+/*
+ * We maintain a list of child process pids and
+ * functions to call when they exit.
+ */
+struct subprocess {
+ pid_t pid;
+ char *prog;
+ void (*done) __P((void *));
+ void *arg;
+ struct subprocess *next;
+};
+
+static struct subprocess *children;
+
/* Prototypes for procedures local to this file. */
static void create_pidfile __P((void));
+static void create_linkpidfile __P((void));
static void cleanup __P((void));
static void close_tty __P((void));
static void get_input __P((void));
struct protent *protp;
struct stat statbuf;
char numbuf[16];
- struct timeval now;
phase = PHASE_INITIALIZE;
- log_to_fd = -1;
+
+ /*
+ * Ensure that fds 0, 1, 2 are open, to /dev/null if nowhere else.
+ * This way we can close 0, 1, 2 in detach() without clobbering
+ * a fd that we are using.
+ */
+ if ((i = open("/dev/null", O_RDWR)) >= 0) {
+ while (0 <= i && i <= 2)
+ i = dup(i);
+ if (i >= 0)
+ close(i);
+ }
script_env = NULL;
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);
+ devnam_fixed = 1;
+ if (!using_pty) {
+ if (!options_for_tty())
+ exit(EXIT_OPTION_ERROR);
+ }
+
+ devnam_fixed = 0;
+ 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);
*/
if (!nodetach && !updetach)
detach();
- pid = getpid();
p = getlogin();
if (p == NULL) {
pw = getpwuid(uid);
waiting = 0;
+ create_linkpidfile();
+
/*
* If we're doing dial-on-demand, set up the interface now.
*/
need_holdoff = 1;
ttyfd = -1;
real_ttyfd = -1;
+ status = EXIT_OK;
+ ++unsuccess;
if (demand) {
/*
for (;;) {
if (sigsetjmp(sigjmp, 1) == 0) {
sigprocmask(SIG_BLOCK, &mask, NULL);
- if (kill_link) {
+ if (kill_link || got_sigchld) {
sigprocmask(SIG_UNBLOCK, &mask, NULL);
} else {
waiting = 1;
info("Starting link");
}
+ phase = PHASE_SERIALCONN;
+
/*
* Get a pty master/slave pair if the pty, notty, or record
* options were specified.
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;
}
/*
* Set line speed, flow control, etc.
- * If we have a non-null connection script,
+ * If we have a non-null connection or initializer script,
* 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
* successfully to the modem with CLOCAL clear and CD down,
* we could clear CLOCAL at this point.
*/
- set_up_tty(ttyfd, (connector != NULL && connector[0] != 0));
+ set_up_tty(ttyfd, ((connector != NULL && connector[0] != 0)
+ || initializer != NULL));
real_ttyfd = ttyfd;
}
* 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;
}
/* run connection script */
- if (connector && connector[0]) {
- MAINDEBUG(("Connecting with <%s>", connector));
-
+ if ((connector && connector[0]) || initializer) {
if (real_ttyfd != -1) {
if (!default_device && modem) {
setdtr(real_ttyfd, 0); /* in case modem is off hook */
}
}
- if (device_script(connector, ttyfd, ttyfd, 0) < 0) {
- error("Connect script failed");
- goto fail;
+ if (initializer && initializer[0]) {
+ if (device_script(initializer, ttyfd, ttyfd, 0) < 0) {
+ error("Initializer script failed");
+ status = EXIT_INIT_FAILED;
+ goto fail;
+ }
+ if (kill_link)
+ goto disconnect;
+
+ info("Serial port initialized.");
}
- if (kill_link)
- goto disconnect;
- info("Serial connection established.");
+ if (connector && connector[0]) {
+ if (device_script(connector, ttyfd, ttyfd, 0) < 0) {
+ error("Connect script failed");
+ status = EXIT_CONNECT_FAILED;
+ goto fail;
+ }
+ if (kill_link)
+ goto disconnect;
+
+ info("Serial connection established.");
+ }
/* set line speed, flow control, etc.;
clear CLOCAL if modem option */
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) {
*/
notice("Connect: %s <--> %s", ifname, ppp_devnam);
gettimeofday(&start_time, NULL);
+ link_stats_valid = 0;
+ script_unsetenv("CONNECT_TIME");
+ script_unsetenv("BYTES_SENT");
+ script_unsetenv("BYTES_RCVD");
lcp_lowerup(0);
/*
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);
- if (kill_link || open_ccp_flag) {
+ if (kill_link || open_ccp_flag || got_sigchld) {
sigprocmask(SIG_UNBLOCK, &mask, NULL);
} else {
waiting = 1;
/*
* Print connect time and statistics.
*/
- if (gettimeofday(&now, NULL) >= 0) {
- int t = now.tv_sec - start_time.tv_sec;
- t = (t + 5) / 6; /* now in 1/10ths of minutes */
- info("Connect time %d.%d minutes.", t/10, t%10);
- }
if (link_stats_valid) {
+ int t = (link_connect_time + 5) / 6; /* 1/10ths of minutes */
+ info("Connect time %d.%d minutes.", t/10, t%10);
info("Sent %d bytes, received %d bytes.",
link_stats.bytes_out, link_stats.bytes_in);
}
if (!demand) {
if (pidfilename[0] != 0
&& unlink(pidfilename) < 0 && errno != ENOENT)
- warn("unable to delete pid file: %m");
+ warn("unable to delete pid file %s: %m", pidfilename);
pidfilename[0] = 0;
}
- if (!persist)
+ if (!persist || (maxfail > 0 && unsuccess >= maxfail))
break;
kill_link = 0;
do {
if (sigsetjmp(sigjmp, 1) == 0) {
sigprocmask(SIG_BLOCK, &mask, NULL);
- if (kill_link) {
+ if (kill_link || got_sigchld) {
sigprocmask(SIG_UNBLOCK, &mask, NULL);
} else {
waiting = 1;
}
/* Wait for scripts to finish */
- while (n_children > 0)
+ /* XXX should have a timeout here */
+ while (n_children > 0) {
+ if (debug) {
+ struct subprocess *chp;
+ dbglog("Waiting for %d child processes...", n_children);
+ for (chp = children; chp != NULL; chp = chp->next)
+ dbglog(" script %s, pid %d", chp->prog, chp->pid);
+ }
reap_kids(1);
+ }
- die(0);
+ die(status);
return 0;
}
}
setsid();
chdir("/");
- close(0); /* XXX we should make sure that none */
- close(1); /* of the fds we need are <= 2 */
+ close(0);
+ close(1);
close(2);
detached = 1;
log_to_fd = -1;
- pid = getpid();
- /* update pid file if it has been written already */
+ /* update pid files if they have been written already */
if (pidfilename[0])
create_pidfile();
+ if (linkpidfile[0])
+ create_linkpidfile();
}
/*
slprintf(pidfilename, sizeof(pidfilename), "%s%s.pid",
_PATH_VARRUN, ifname);
if ((pidfile = fopen(pidfilename, "w")) != NULL) {
- fprintf(pidfile, "%d\n", pid);
+ fprintf(pidfile, "%d\n", getpid());
(void) fclose(pidfile);
} else {
error("Failed to create pid file %s: %m", pidfilename);
pidfilename[0] = 0;
}
- slprintf(numbuf, sizeof(numbuf), "%d", pid);
+ slprintf(numbuf, sizeof(numbuf), "%d", getpid());
script_setenv("PPPD_PID", numbuf);
+ if (linkpidfile[0])
+ create_linkpidfile();
+}
+
+static void
+create_linkpidfile()
+{
+ FILE *pidfile;
+
+ if (linkname[0] == 0)
+ return;
+ slprintf(linkpidfile, sizeof(linkpidfile), "%sppp-%s.pid",
+ _PATH_VARRUN, linkname);
+ if ((pidfile = fopen(linkpidfile, "w")) != NULL) {
+ fprintf(pidfile, "%d\n", getpid());
+ if (pidfilename[0])
+ fprintf(pidfile, "%s\n", ifname);
+ (void) fclose(pidfile);
+ } else {
+ error("Failed to create pid file %s: %m", linkpidfile);
+ linkpidfile[0] = 0;
+ }
+ script_setenv("LINKNAME", linkname);
}
/*
if (len == 0) {
notice("Modem hangup");
hungup = 1;
+ status = EXIT_HANGUP;
lcp_lowerdown(0); /* serial link is no longer available */
link_terminated(0);
return;
close_tty();
if (pidfilename[0] != 0 && unlink(pidfilename) < 0 && errno != ENOENT)
- warn("unable to delete pid file: %m");
+ warn("unable to delete pid file %s: %m", pidfilename);
pidfilename[0] = 0;
+ if (linkpidfile[0] != 0 && unlink(linkpidfile) < 0 && errno != ENOENT)
+ warn("unable to delete pid file %s: %m", linkpidfile);
+ linkpidfile[0] = 0;
if (locked)
unlock();
real_ttyfd = -1;
}
+/*
+ * update_link_stats - get stats at link termination.
+ */
+void
+update_link_stats(u)
+ int u;
+{
+ struct timeval now;
+ char numbuf[32];
+
+ if (!get_ppp_stats(u, &link_stats)
+ || gettimeofday(&now, NULL) < 0)
+ return;
+ link_connect_time = now.tv_sec - start_time.tv_sec;
+ link_stats_valid = 1;
+
+ slprintf(numbuf, sizeof(numbuf), "%d", link_connect_time);
+ script_setenv("CONNECT_TIME", numbuf);
+ slprintf(numbuf, sizeof(numbuf), "%d", link_stats.bytes_out);
+ script_setenv("BYTES_SENT", numbuf);
+ slprintf(numbuf, sizeof(numbuf), "%d", link_stats.bytes_in);
+ script_setenv("BYTES_RCVD", numbuf);
+}
+
struct callout {
struct timeval c_time; /* time at which to call routine */
{
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);
}
}
-/*
- * We maintain a list of child process pids and
- * functions to call when they exit.
- */
-struct subprocess {
- pid_t pid;
- char *prog;
- void (*done) __P((void *));
- void *arg;
- struct subprocess *next;
-};
-
-struct subprocess *children;
-
/*
* run-program - execute a program with given arguments,
* but don't wait for it.
}
if (debug)
- dbglog("Script %s started; pid = %d", prog, pid);
+ dbglog("Script %s started (pid %d)", prog, pid);
record_child(pid, prog, done, arg);
return pid;
while ((pid = waitpid(-1, &status, (waitfor? 0: WNOHANG))) != -1
&& pid != 0) {
--n_children;
- for (prevp = &children; (chp = *prevp) != NULL; prevp = &chp->next)
- if (chp->pid == pid)
+ for (prevp = &children; (chp = *prevp) != NULL; prevp = &chp->next) {
+ if (chp->pid == pid) {
+ *prevp = chp->next;
break;
+ }
+ }
if (WIFSIGNALED(status)) {
warn("Child process %s (pid %d) terminated with signal %d",
(chp? chp->prog: "??"), pid, WTERMSIG(status));
(chp? chp->prog: "??"), pid, status);
if (chp && chp->done)
(*chp->done)(chp->arg);
+ if (chp)
+ free(chp);
}
if (pid == -1 && errno != ECHILD && errno != EINTR)
error("Error waiting for child process: %m");
projects / ppp.git / blobdiff