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* CRAM-MD5 authentication support a la RFC2195.Eric S. Raymond1999-06-081-0/+1
* Fix fetchmailconf to handle window-manager destroy notifications.Eric S. Raymond1999-05-171-0/+1
* Add qpopper 2.53 warning.Eric S. Raymond1999-05-161-0/+1
* There is now a documented return code 13 for termination on fetchlimit.Eric S. Raymond1999-05-161-1/+2
* Fix a qmail \n bug.Eric S. Raymond1999-05-161-0/+1
* GIF -> XPM.Eric S. Raymond1999-05-121-0/+6
* We shipped this.Eric S. Raymond1999-05-031-0/+6
* Bug fix release.Eric S. Raymond1999-04-301-2/+3
* We now have SSL patches.Eric S. Raymond1999-04-291-0/+1
* Document new environment logic.Eric S. Raymond1999-04-251-4/+6
* Deleted -> Seen, Deleted.Eric S. Raymond1999-04-211-0/+6
* Get these bug fixes in before the Red Hat 6 freeze.Eric S. Raymond1999-04-181-2/+2
* Version bump.Eric S. Raymond1999-04-181-0/+1
* Enable expunge to controil POP2 and POP3 checkpointing.Eric S. Raymond1999-04-181-1/+2
* Killed the segfault-13 bug.Eric S. Raymond1999-04-171-1/+2
* First round of post-5.0.0 buglets.Eric S. Raymond1999-04-071-0/+7
* Ready to ship.Eric S. Raymond1999-04-051-2/+2
* Carry pointers to hotmole.Eric S. Raymond1999-04-051-0/+1
* Added SpryNet support.Eric S. Raymond1999-04-011-0/+1
* Updated.Eric S. Raymond1999-03-301-0/+1
* Fix .netrc code to search on both host and user name.Eric S. Raymond1999-03-281-0/+1
* Ready to ship.Eric S. Raymond1999-03-271-1/+1
* Fix PGP-mimedecode.Eric S. Raymond1999-03-271-0/+1
* Add Danish summary and dscription.Eric S. Raymond1999-03-271-0/+8
* Date stamp.Eric S. Raymond1999-03-091-1/+1
* -0/+3
* Ready to ship.Eric S. Raymond1999-02-021-2/+2
* Return of the dancing progress dots.Eric S. Raymond1999-02-011-0/+1
* Move /proc/net/dev derivation to runtime.Eric S. Raymond1999-01-311-0/+2
* Added MD5 checksums to web page.Eric S. Raymond1999-01-311-0/+6
* Typo fix.Eric S. Raymond1999-01-311-1/+1
* Version bump.Eric S. Raymond1999-01-311-2/+2
* Better bounce behavior.Eric S. Raymond1999-01-311-0/+2
* SDPS changes from Paul Murphy.Eric S. Raymond1999-01-301-1/+2
* This version appears ready to ship.Eric S. Raymond1999-01-301-1/+3
* Make ' work as string quote.Eric S. Raymond1999-01-101-0/+8
* Henrik's fix for mimedecode.Eric S. Raymond1999-01-091-0/+3
* Ready to ship.Eric S. Raymond1999-01-091-3/+3
* Added Polish translation.Eric S. Raymond1999-01-071-3/+5
generated by cgit v1.2.3 (git 2.46.0) at 2026-06-18 01:54:53 +0000
/span>/* the POSIX way */ int status; while (waitpid(-1, &status, WNOHANG) > 0) continue; /* swallow 'em up. */ #elif defined(HAVE_WAIT3) /* the BSD way */ pid_t pid; #if defined(HAVE_UNION_WAIT) && !defined(__FreeBSD__) union wait status; #else int status; #endif while ((pid = wait3(&status, WNOHANG, 0)) > 0) continue; /* swallow 'em up. */ #else /* Zooks! Nothing to do but wait(), and hope we don't block... */ int status; wait(&status); #endif lastsig = SIGCHLD; (void)sig; } RETSIGTYPE null_signal_handler(int sig) { (void)sig; } SIGHANDLERTYPE set_signal_handler(int sig, SIGHANDLERTYPE handler) /* * This function is called by other parts of the program to * setup the signal handler after a change to the signal context. * This is done to improve robustness of the signal handling code. * It has the same prototype as signal(2). */ { SIGHANDLERTYPE rethandler; #ifdef HAVE_SIGACTION struct sigaction sa_new, sa_old; memset (&sa_new, 0, sizeof sa_new); sigemptyset (&sa_new.sa_mask); sa_new.sa_handler = handler; sa_new.sa_flags = 0; #ifdef SA_RESTART /* SunOS 4.1 portability hack */ /* system call should restart on all signals except SIGALRM */ if (sig != SIGALRM) sa_new.sa_flags |= SA_RESTART; #endif #ifdef SA_NOCLDSTOP /* SunOS 4.1 portability hack */ if (sig == SIGCHLD) sa_new.sa_flags |= SA_NOCLDSTOP; #endif sigaction(sig, &sa_new, &sa_old); rethandler = sa_old.sa_handler; #if defined(SIGPWR) if (sig == SIGCHLD) sigaction(SIGPWR, &sa_new, NULL); #endif #else /* HAVE_SIGACTION */ rethandler = signal(sig, handler); #if defined(SIGPWR) if (sig == SIGCHLD) signal(SIGPWR, handler); #endif /* system call should restart on all signals except SIGALRM */ siginterrupt(sig, sig == SIGALRM); #endif /* HAVE_SIGACTION */ return rethandler; } void deal_with_sigchld(void) { set_signal_handler(SIGCHLD, sigchld_handler); } int daemonize (const char *logfile) /* detach from control TTY, become process group leader, catch SIGCHLD */ { int fd, logfd; pid_t childpid; /* if we are started by init (process 1) via /etc/inittab we needn't bother to detach from our process group context */ if (getppid() == 1) goto nottyDetach; /* Ignore BSD terminal stop signals */ #ifdef SIGTTOU set_signal_handler(SIGTTOU, SIG_IGN); #endif #ifdef SIGTTIN set_signal_handler(SIGTTIN, SIG_IGN); #endif #ifdef SIGTSTP set_signal_handler(SIGTSTP, SIG_IGN); #endif /* In case we were not started in the background, fork and let the parent exit. Guarantees that the child is not a process group leader */ if ((childpid = fork()) < 0) { report(stderr, "fork (%s)\n", strerror(errno)); return(PS_IOERR); } else if (childpid > 0) exit(0); /* parent */ /* Make ourselves the leader of a new process group with no controlling terminal */ #if defined(HAVE_SETSID) /* POSIX */ /* POSIX makes this soooo easy to do */ if (setsid() < 0) { report(stderr, "setsid (%s)\n", strerror(errno)); return(PS_IOERR); } #elif defined(SIGTSTP) /* BSD */ /* change process group */ #ifndef __EMX__ setpgrp(0, getpid()); #endif /* lose controlling tty */ if ((fd = open("/dev/tty", O_RDWR)) >= 0) { ioctl(fd, TIOCNOTTY, (char *) 0); close(fd); /* not checking should be safe, there were no writes */ } #else /* SVR3 and older */ /* change process group */ #ifndef __EMX__ setpgrp(); #endif /* lose controlling tty */ set_signal_handler(SIGHUP, SIG_IGN); if ((childpid = fork()) < 0) { report(stderr, "fork (%s)\n", strerror(errno)); return(PS_IOERR); } else if (childpid > 0) { exit(0); /* parent */ } #endif nottyDetach: (void)close(0); /* Reopen stdin descriptor on /dev/null */ if (open("/dev/null", O_RDWR) < 0) { /* stdin */ report(stderr, "cannot open /dev/null: %s\n", strerror(errno)); return(PS_IOERR); } if (logfile) { if ((logfd = open(logfile, O_CREAT|O_WRONLY|O_APPEND, 0666)) < 0) { /* stdout */ report(stderr, "cannot open %s: %s\n", logfile, strerror(errno)); return PS_IOERR; } } else logfd = 0; /* else use /dev/null */ /* Close any/all open file descriptors */ #if defined(HAVE_GETDTABLESIZE) fd = getdtablesize() - 1; #elif defined(NOFILE) fd = NOFILE - 1; #else /* make an educated guess */ fd = 1023; #endif while (fd >= 1) { if (fd != logfd) close(fd); /* not checking this should be safe, no writes */ -- fd; } if (dup(logfd) < 0 /* stdout */ || ((logfd == 0 || logfd >= 3) && dup(logfd) < 0)) { /* stderr */ report(stderr, "dup (%s)\n", strerror(errno)); return(PS_IOERR); } #ifdef HAVE_GETCWD /* move to root directory, so we don't prevent filesystem unmounts */ chdir("/"); #endif /* set our umask to something reasonable (we hope) */ #if defined(DEF_UMASK) umask(DEF_UMASK); #else umask(022); #endif deal_with_sigchld(); return(0); } flag is_a_file(int fd) /* is the given fd attached to a file? (used to control logging) */ { struct stat stbuf; /* * We'd like just to return 1 on (S_IFREG | S_IFBLK), * but weirdly enough, Linux ptys seem to have S_IFBLK * so this test would fail when run on an xterm. */ if (isatty(fd) || fstat(fd, &stbuf)) return(0); else if (stbuf.st_mode & (S_IFREG)) return(1); return(0); } /* daemon.c ends here */