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| -rw-r--r-- | Makefile.in | 241 | ||||
| -rw-r--r-- | daemon.c | 221 |
2 files changed, 462 insertions, 0 deletions
diff --git a/Makefile.in b/Makefile.in new file mode 100644 index 00000000..7f061806 --- /dev/null +++ b/Makefile.in @@ -0,0 +1,241 @@ +# +# Makefile for popclient +# Carl Harris, ceharris@mal.com +# +# $Log: Makefile.in,v $ +# Revision 1.1 1996/06/25 14:29:44 esr +# Initial revision +# +# Revision 1.5 1995/08/10 00:32:19 ceharris +# Preparation for 3.0b3 beta release: +# - added code for --kill/--keep, --limit, --protocol, --flush +# options; --pop2 and --pop3 options now obsoleted by --protocol. +# - added support for APOP authentication, including --with-APOP +# argument for configure. +# - provisional and broken support for RPOP +# - added buffering to SockGets and SockRead functions. +# - fixed problem of command-line options not being correctly +# carried into the merged options record. +# +# Revision 1.4 1995/08/09 01:32:41 ceharris +# Version 3.0 beta 2 release. +# Added +# - .poprc functionality +# - GNU long options +# - multiple servers on the command line. +# Fixed +# - Passwords showing up in ps output. +# +# Revision 1.3 1995/08/08 01:01:11 ceharris +# Added GNU-style long options processing. +# Fixed password in 'ps' output problem. +# Fixed various RCS tag blunders. +# Integrated .poprc parser, lexer, etc into Makefile processing. +# +# + +# Ultrix 2.2 make doesn't expand the value of VPATH. +srcdir = @srcdir@ +VPATH = @srcdir@ + +CC = @CC@ + +CFLAGS = @CFLAGS@ +LDFLAGS = @LDFLAGS@ +LEX = @LEX@ +LEXFLAGS= +YACC = @YACC@ +YACCFLAGS=-d + +# How to invoke ranlib. This is only used by the `glob' subdirectory. +RANLIB = @RANLIB@ + +# NeXT 1.0a uses an old version of GCC, which required -D__inline=inline. +# See also `config.h'. +defines = @DEFS@ + +# If your system needs extra libraries loaded in, define them here. +LOADLIBES = @LIBS@ @LEXLIB@ + +# Any extra object files your system needs. +extras = @LIBOBJS@ + +# Extra sources/objects for library functions not provided on the host system. +EXTRASRC = @EXTRASRC@ +EXTRAOBJ = @EXTRAOBJ@ + +# Common prefix for machine-independent installed files. +prefix = /usr/local +# Common prefix for machine-dependent installed files. +exec_prefix = $(prefix) + +# Name under which to install popclient +instname = popclient +# Directory in which to install. +bindir = $(exec_prefix)/bin +# Directory to install the Info files in. +infodir = $(prefix)/info +# Directory to install the man page in. +mandir = $(prefix)/man/man$(manext) +# Number to put on the man page filename. +manext = 1 + +# Program to install `make'. +INSTALL_PROGRAM = @INSTALL_PROGRAM@ +# Program to install the man page. +INSTALL_DATA = @INSTALL_DATA@ +# Generic install program. +INSTALL = @INSTALL@ + +# Program to format Texinfo source into Info files. +MAKEINFO = makeinfo +# Program to format Texinfo source into DVI files. +TEXI2DVI = texi2dvi + +# Programs to make tags files. +ETAGS = etags -tw +CTAGS = ctags -tw + +objs = socket.o getpass.o pop2.o pop3.o popclient.o options.o \ + poprc_l.o poprc_y.o poprc.o xmalloc.o \ + $(EXTRAOBJ) $(extras) + +srcs = $(srcdir)/socket.c $(srcdir)/getpass.c $(srcdir)/pop2.c \ + $(srcdir)/pop3.c $(srcdir)/popclient.c $(srcdir)/options.c \ + $(srcdir)/poprc_l.c $(srcdir)/poprc_y.c $(srcdir)/poprc.c \ + $(srcdir)/xmalloc.c \ + $(EXTRASRC) + + +.SUFFIXES: +.SUFFIXES: .o .c .h .y .l .ps .dvi .info .texi + +all: popclient +check: # No tests. +depend: + test -f config.h || touch config.h + test -f poprc_y.h || touch poprc_y.h + makedepend -fMakefile.in *.c + +info: popclient.info +dvi: popclient.dvi +# Some makes apparently use .PHONY as the default goal is it is before `all'. +.PHONY: all check info dvi + +popclient.info: popclient.texi + $(MAKEINFO) -I$(srcdir) $(srcdir)/popclient.texi -o popclient.info + +popclient.dvi: popclient.texi + $(TEXI2DVI) $(srcdir)/popclient.texi + +popclient.ps: popclient.dvi + dvi2ps popclient.dvi > popclient.ps + +popclient: $(srcdir)/poprc_l.c $(srcdir)/poprc_y.c $(objs) + $(CC) $(LDFLAGS) $(objs) $(LOADLIBES) -o popclient + + +# -I. is needed to find config.h in the build directory. +.c.o: + $(CC) $(defines) -c -I. -I$(srcdir) $(CFLAGS) $< $(OUTPUT_OPTION) + +# lex rule +.l.o: + +.l.c: + $(LEX) $(LEXFLAGS) $< + mv lex.yy.c $@ + +# yacc rule +.y.o: + +.y.c: + $(YACC) $(YACCFLAGS) $< + mv y.tab.c $@ + mv -f y.tab.h $*.h + +# For some losing Unix makes. +SHELL = /bin/sh +MAKE = make + +FORCE: + +tagsrcs = $(srcs) +TAGS: $(tagsrcs) + $(ETAGS) $(tagsrcs) +tags: $(tagsrcs) + $(CTAGS) $(tagsrcs) + +.PHONY: install installdirs +install: installdirs \ + $(bindir)/$(instname) $(infodir)/popclient.info \ + $(mandir)/$(instname).$(manext) + +installdirs: + $(SHELL) ${srcdir}/mkinstalldirs $(bindir) $(infodir) $(mandir) + +$(bindir)/$(instname): popclient + $(INSTALL_PROGRAM) popclient $@ + +$(infodir)/popclient.info: popclient.info + if [ -r ./popclient.info ]; then dir=.; else dir=$(srcdir); fi; \ + for file in $${dir}/popclient.info*; do \ + name="`basename $$file`"; \ + $(INSTALL_DATA) $$file \ + `echo $@ | sed "s,popclient.info\$$,$$name,"`; \ + done +# Run install-info only if it exists. +# Use `if' instead of just prepending `-' to the +# line so we notice real errors from install-info. +# We use `$(SHELL) -c' because some shells do not +# fail gracefully when there is an unknown command. + if $(SHELL) -c 'install-info --version' >/dev/null 2>&1; then \ + install-info --infodir=$(infodir) $$dir/popclient.info; \ + else true; fi + +$(mandir)/$(instname).$(manext): popclient.man + $(INSTALL_DATA) $(srcdir)/popclient.man $@ + + +.PHONY: clean realclean distclean mostlyclean +clean: + -rm -f popclient *.o core popclient.dvi \ + poprc_l.c poprc_y.h poprc_y.c + +distclean: clean + -rm -f Makefile config.h + -rm -f config.cache config.status config.log stamp-config + -rm -f TAGS tags + -rm -f popclient.log popclient.toc popclient.*aux + +realclean: popclient.info* distclean + +mostlyclean: clean + +Makefile: config.status $(srcdir)/Makefile.in + $(SHELL) config.status + +config.h: stamp-config + +stamp-config: config.status $(srcdir)/config.h.in + $(SHELL) config.status + touch stamp-config + +configure: configure.in + autoconf $(ACFLAGS) + +# This tells versions [3.59,3.63) of GNU make not to export all variables. +.NOEXPORT: + + +# Special dependencies, not easily handled without explicit rules +$(srcdir)/poprc_l.c: $(srcdir)/poprc_l.l +$(srcdir)/poprc_y.c: $(srcdir)/poprc_y.y + + +# The automatically generated dependencies below may omit config.h +# because it is included with ``#include <config.h>'' rather than +# ``#include "config.h"''. So we add the explicit dependency to make sure. +$(objs): config.h + +# Automatically generated dependencies will be put at the end of the file. diff --git a/daemon.c b/daemon.c new file mode 100644 index 00000000..56aab4ef --- /dev/null +++ b/daemon.c @@ -0,0 +1,221 @@ +/* Copyright 1993-95 by Carl Harris, Jr. + * All rights reserved + * + * Distribute freely, except: don't remove my name from the source or + * documentation (don't take credit for my work), mark your changes (don't + * get me blamed for your possible bugs), don't alter or remove this + * notice. May be sold if buildable source is provided to buyer. No + * warrantee of any kind, express or implied, is included with this + * software; use at your own risk, responsibility for damages (if any) to + * anyone resulting from the use of this software rests entirely with the + * user. + * + * Send bug reports, bug fixes, enhancements, requests, flames, etc., and + * I'll try to keep a version up to date. I can be reached as follows: + * Carl Harris <ceharris@mal.com> + */ + + +/*********************************************************************** + module: daemon + project: popclient + programmer: Carl Harris, ceharris@mal.com + description: This module contains all of the code needed to + turn a process into a daemon for POSIX, SysV, and + BSD systems. + + $Log: daemon.c,v $ + Revision 1.1 1996/06/25 14:32:01 esr + Initial revision + + Revision 1.1 1995/08/14 18:36:38 ceharris + Patches to support POP3's LAST command. + Final revisions for beta3 release. + + ***********************************************************************/ + + +#include <config.h> + +#include <stdio.h> +#include <sys/types.h> +#include <sys/file.h> +#include <signal.h> +#include <fcntl.h> + +#if defined(HAVE_SYS_WAIT_H) +# include <sys/wait.h> +#endif + +#if defined(HAVE_UNISTD_H) +# include <unistd.h> +#endif + + +#include "popclient.h" + + +/****************************************************************** + function: sigchld_handler + description: Process the SIGCHLD (a.k.a SIGCLD) signal by calling + a wait() variant to obtain the exit code of the + terminating process. + arguments: none. + ret. value: none (or undefined if REGSIGTYPE is int). + globals: none. + calls: none. + *****************************************************************/ + +RETSIGTYPE +sigchld_handler () +{ + pid_t pid; + +#if defined(HAVE_UNION_WAIT) + union wait status; +#else + int status; +#endif + +#if defined(HAVE_WAIT3) + while ((pid = wait3(&status, WNOHANG, (struct rusage *) 0)) > 0) + ; /* swallow 'em up. */ +#elif defined(HAVE_WAITPID) + while ((pid = waitpid(-1, &status, WNOHANG)) > 0) + ; /* swallow 'em up. */ +#else /* Zooks! Nothing to do but wait(), and hope we don't block... */ + wait(&status); +#endif + +} + + + +/****************************************************************** + function: daemonize + description: become a daemon process; i.e. detach from the + control terminal, don't reacquire a control terminal, + become process group leader of our own process group, + and set up to catch child process termination signals. + arguments: + options command-line options. + + ret. value: none. + globals: refers to the address of sigchld_handler(). + calls: none. + *****************************************************************/ + +int +daemonize (options) +struct optrec *options; +{ + int fd; + pid_t childpid; + RETSIGTYPE sigchild_handler(); + + /* 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 + signal(SIGTTOU, SIG_IGN); +#endif +#ifdef SIGTTIN + signal(SIGTTIN, SIG_IGN); +#endif +#ifdef SIGTSTP + signal(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) { + perror("fork"); + 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) { + perror("setsid"); + return(PS_IOERR); + } +#elif defined(SIGTSTP) /* BSD */ + /* change process group */ + setpgrp(0, getpid()); + + /* lose controlling tty */ + if ((fd = open("/dev/tty", O_RDWR)) >= 0) { + ioctl(fd, TIOCNOTTY, (char *) 0); + close(fd); + } +#else /* SVR3 and older */ + /* change process group */ + setpgrp(); + + /* lose controlling tty */ + signal(SIGHUP, SIG_IGN); + if ((childpid = fork) < 0) { + perror("fork"); + return(PS_IOERR); + } + else if (childpid > 0) { + exit(0); /* parent */ + } +#endif + +nottyDetach: + + /* Close any/all open file descriptors */ +#if defined(HAVE_GETDTABLESIZE) + for (fd = getdtablesize()-1; fd >= 0; fd--) +#elif defined(NOFILE) + for (fd = NOFILE-1; fd >= 0; fd--) +#else /* make an educated guess */ + for (fd = 19; fd >= 0; fd--) +#endif + { + close(fd); + } + + /* Reopen stdin descriptor on /dev/null */ + if ((fd = open("/dev/null", O_RDWR)) < 0) { /* stdin */ + perror("open: /dev/null"); + return(PS_IOERR); + } + + + if (dup(fd) < 0) { /* stdout */ + log_perror("dup"); + return(PS_IOERR); + } + if (dup(fd) < 0) { /* stderr */ + log_perror("dup"); + return(PS_IOERR); + } + + /* move to root directory, so we don't prevent filesystem unmounts */ + chdir("/"); + + /* set our umask to something reasonable (we hope) */ +#if defined(DEF_UMASK) + umask(DEF_UMASK); +#else + umask(022); +#endif + + /* set up to catch child process termination signals */ + signal(SIGCLD, sigchild_handler); + +} |