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- /*
- * dip A program for handling dialup IP connecions.
- * Handle the process of going into the background.
- *
- * Version: @(#)daemon.c 3.3.3 08/16/93
- *
- * Author: Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG>
- * Copyright 1988-1993 MicroWalt Corporation
- *
- * This program is free software; you can redistribute it
- * and/or modify it under the terms of the GNU General
- * Public License as published by the Free Software
- * Foundation; either version 2 of the License, or (at
- * your option) any later version.
- */
- #include "dip.h"
-
- extern int tty_lock(char *path, int mode);
- static void (*oldalrmsig)(int);
-
- /* Catch any signals. */
- static void
- sig_catcher(int sig)
- {
- alarm (0);
- (void) signal (SIGALRM, oldalrmsig);
-
- (void) tty_close();
- exit(0);
- }
-
-
- static void sig_login_catcher(int sig)
- {
- (void) signal (SIGALRM, oldalrmsig);
- alarm (0);
-
- (void) tty_login_close();
- exit(0);
- }
-
-
-
- /* Record the current processID in a file. */
- static void
- dip_record(void)
- {
- FILE *fp;
-
- fp = fopen(_PATH_DIP_PID, "w");
- if (fp == NULL) {
- syslog(LOG_ERR, "DIP: cannot create %s: %s\n",
- _PATH_DIP_PID, strerror(errno));
- fprintf(stderr, "DIP: cannot create %s: %s\n",
- _PATH_DIP_PID, strerror(errno));
- return;
- }
- fprintf(fp, "%d", getpid());
- (void) fclose(fp);
- }
-
-
- int
- dip_setup(struct dip *dp)
- {
- int i;
-
- oldalrmsig = signal (SIGALRM, SIG_IGN);
- for(i = 1; i < 32; i++)
- (void) signal(i, SIG_IGN);
- (void) signal(SIGHUP, sig_login_catcher);
- (void) signal(SIGINT, sig_catcher);
- (void) signal(SIGTERM, sig_catcher);
- (void) signal(SIGQUIT, sig_catcher);
-
- (void) chdir(dp->home);
-
- /* Fire up the protocol here. */
- protosw[dp->protonr-1].func(dp);
-
- /* Wait forever to terminate. */
- while(1) {
- (void) sleep(30);
- }
-
- return(0);
- }
-
-
-
- int dip_login_setup(struct dip *dp)
- {
- int i;
-
- oldalrmsig = signal (SIGALRM, SIG_IGN);
- for(i = 1; i < 32; i++)
- (void) signal(i, SIG_IGN);
- (void) signal(SIGHUP, sig_login_catcher);
- (void) signal(SIGINT, sig_catcher);
- (void) signal(SIGTERM, sig_login_catcher);
- (void) signal(SIGQUIT, sig_catcher);
-
- (void) chdir(dp->home);
-
- /* Fire up the protocol here. */
- protosw[dp->protonr-1].func(dp);
-
- /* Wait forever to terminate. */
- while(1) {
- (void) sleep(30);
- }
-
- return(0);
- }
-
-
-
- int
- dip_daemon(struct dip *dip)
- {
- int i;
-
- /* First of all, fork off a sub-process. */
- if ((i = fork()) < 0) return(-1);
- if (i != 0) exit(0);
-
- #if 1
- /* Make tty the control terminal, detect DCD loss from now. */
- if ((i = tty_notlocal()) < 0)
- return i;
- #endif
-
- /* Record our PID. */
- dip_record();
-
- /* Re-acquire the lock */
- (void)tty_lock("no_matter", 2);
-
- /* Standard BSD behaviour: change to the root dir. */
- return(dip_setup(dip));
- }
-