Import the latest version of the 44BSD C-shell -- tcsh-6.09.

1 files changed, 2441 insertions, 0 deletions

diff --git a/contrib/tcsh/sh.c b/contrib/tcsh/sh.c
new file mode 100644
index 0000000..8703dc8
--- /dev/null
+++ b/contrib/tcsh/sh.c
@@ -0,0 +1,2441 @@
+/* $Header: /src/pub/tcsh/sh.c,v 3.89 1999/08/13 16:32:51 christos Exp $ */
+/*
+ * sh.c: Main shell routines
+ */
+/*-
+ * Copyright (c) 1980, 1991 The Regents of the University of California.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed by the University of
+ *	California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+#define EXTERN	/* Intern */
+#include "sh.h"
+
+#ifndef lint
+char    copyright[] =
+"@(#) Copyright (c) 1991 The Regents of the University of California.\n\
+ All rights reserved.\n";
+#endif /* not lint */
+
+RCSID("$Id: sh.c,v 3.89 1999/08/13 16:32:51 christos Exp $")
+
+#include "tc.h"
+#include "ed.h"
+#include "tw.h"
+
+extern bool MapsAreInited;
+extern bool NLSMapsAreInited;
+extern bool NoNLSRebind;
+
+/*
+ * C Shell
+ *
+ * Bill Joy, UC Berkeley, California, USA
+ * October 1978, May 1980
+ *
+ * Jim Kulp, IIASA, Laxenburg, Austria
+ * April 1980
+ *
+ * Filename recognition added:
+ * Ken Greer, Ind. Consultant, Palo Alto CA
+ * October 1983.
+ *
+ * Karl Kleinpaste, Computer Consoles, Inc.
+ * Added precmd, periodic/tperiod, prompt changes,
+ * directory stack hack, and login watch.
+ * Sometime March 1983 - Feb 1984.
+ *
+ * Added scheduled commands, including the "sched" command,
+ * plus the call to sched_run near the precmd et al
+ * routines.
+ * Upgraded scheduled events for running events while
+ * sitting idle at command input.
+ *
+ * Paul Placeway, Ohio State
+ * added stuff for running with twenex/inputl  9 Oct 1984.
+ *
+ * ported to Apple Unix (TM) (OREO)  26 -- 29 Jun 1987
+ */
+
+jmp_buf_t reslab INIT_ZERO_STRUCT;
+
+static const char tcshstr[] = "tcsh";
+#ifdef WINNT
+static const char tcshstr_nt[] = "tcsh.exe";
+#endif /* WINNT */
+
+signalfun_t parintr = 0;	/* Parents interrupt catch */
+signalfun_t parterm = 0;	/* Parents terminate catch */
+
+#ifdef TESLA
+int do_logout = 0;
+#endif /* TESLA */
+
+
+bool    use_fork = 0;		/* use fork() instead of vfork()? */
+
+/*
+ * Magic pointer values. Used to specify other invalid conditions aside
+ * from null.
+ */
+static Char	INVCHAR;
+Char    *INVPTR = &INVCHAR;
+Char    **INVPPTR = &INVPTR;
+
+static int     nofile = 0;
+static bool    reenter = 0;
+static bool    nverbose = 0;
+static bool    nexececho = 0;
+static bool    quitit = 0;
+static bool    rdirs = 0;
+bool    fast = 0;
+static bool    batch = 0;
+static bool    mflag = 0;
+static bool    prompt = 1;
+static int     enterhist = 0;
+bool    tellwhat = 0;
+time_t  t_period;
+Char  *ffile = NULL;
+bool	dolzero = 0;
+int	insource = 0;
+static time_t  chktim;		/* Time mail last checked */
+char *progname;
+int tcsh;
+extern char **environ;
+
+/*
+ * This preserves the input state of the shell. It is used by
+ * st_save and st_restore to manupulate shell state.
+ */
+struct saved_state {
+    int		  insource;
+    int		  SHIN;
+    int		  intty;
+    struct whyle *whyles;
+    Char 	 *gointr;
+    Char 	 *arginp;
+    Char	 *evalp;
+    Char	**evalvec;
+    Char	 *alvecp;
+    Char	**alvec;
+    int		  onelflg;
+    bool	  enterhist;
+    Char	**argv;
+    Char	  HIST;
+    bool	  cantell;
+    struct Bin	  B;
+    /* These keep signal state and setjump state */
+#ifdef BSDSIGS
+    sigmask_t	  mask;
+#endif
+    jmp_buf_t	  oldexit;
+    int		  reenter;
+};
+
+static	int		  srccat	__P((Char *, Char *));
+static	int		  srcfile	__P((char *, bool, int, Char **));
+static	sigret_t	  phup		__P((int));
+static	void		  srcunit	__P((int, bool, int, Char **));
+static	void		  mailchk	__P((void));
+#ifndef _PATH_DEFPATH
+static	Char	 	**defaultpath	__P((void));
+#endif
+static	void		  record	__P((void));
+static	void		  st_save	__P((struct saved_state *, int, int,
+					     Char **, Char **));
+static	void		  st_restore	__P((struct saved_state *, Char **));
+
+	int		  main		__P((int, char **));
+
+int
+main(argc, argv)
+    int     argc;
+    char  **argv;
+{
+    register Char *cp;
+#ifdef AUTOLOGOUT
+    register Char *cp2;
+#endif
+    register char *tcp, *ttyn;
+    register int f;
+    register char **tempv;
+
+#ifdef BSDSIGS
+    sigvec_t osv;
+#endif /* BSDSIGS */
+
+#ifdef WINNT
+    nt_init();
+#endif /* WINNT */
+#if defined(NLS_CATALOGS) && defined(LC_MESSAGES)
+    (void) setlocale(LC_MESSAGES, "");
+#endif /* NLS_CATALOGS && LC_MESSAGES */
+
+#ifdef NLS
+# ifdef LC_CTYPE
+    (void) setlocale(LC_CTYPE, ""); /* for iscntrl */
+# endif /* LC_CTYPE */
+#endif /* NLS */
+
+    nlsinit();
+
+#ifdef MALLOC_TRACE
+     mal_setstatsfile(fdopen(dup2(open("/tmp/tcsh.trace", 
+				       O_WRONLY|O_CREAT, 0666), 25), "w"));
+     mal_trace(1);
+#endif /* MALLOC_TRACE */
+
+#if !(defined(BSDTIMES) || defined(_SEQUENT_)) && defined(POSIX)
+# ifdef _SC_CLK_TCK
+    clk_tck = (clock_t) sysconf(_SC_CLK_TCK);
+# else /* ! _SC_CLK_TCK */
+#  ifdef CLK_TCK
+    clk_tck = CLK_TCK;
+#  else /* !CLK_TCK */
+    clk_tck = HZ;
+#  endif /* CLK_TCK */
+# endif /* _SC_CLK_TCK */
+#endif /* !BSDTIMES && POSIX */
+
+    settimes();			/* Immed. estab. timing base */
+#ifdef TESLA
+    do_logout = 0;
+#endif /* TESLA */
+
+    /*
+     * Make sure we have 0, 1, 2 open
+     * Otherwise `` jobs will not work... (From knaff@poly.polytechnique.fr)
+     */
+    {
+	do 
+	    if ((f = open(_PATH_DEVNULL, O_RDONLY)) == -1 &&
+		(f = open("/", O_RDONLY)) == -1) 
+		exit(1);
+	while (f < 3);
+	(void) close(f);
+    }
+
+    osinit();			/* Os dependent initialization */
+
+    
+    {
+	char *t;
+
+	t = strrchr(argv[0], '/');
+#ifdef WINNT
+	{
+	    char *s = strrchr(argv[0], '\\');
+	    if (s)
+		t = s;
+	}
+#endif /* WINNT */
+	t = t ? t + 1 : argv[0];
+	if (*t == '-') t++;
+	progname = strsave((t && *t) ? t : tcshstr);    /* never want a null */
+	tcsh = strcmp(progname, tcshstr) == 0;
+    }
+
+    /*
+     * Initialize non constant strings
+     */
+#ifdef _PATH_BSHELL
+    STR_BSHELL = SAVE(_PATH_BSHELL);
+#endif
+#ifdef _PATH_TCSHELL
+    STR_SHELLPATH = SAVE(_PATH_TCSHELL);
+#else
+# ifdef _PATH_CSHELL
+    STR_SHELLPATH = SAVE(_PATH_CSHELL);
+# endif
+#endif
+    STR_environ = blk2short(environ);
+    environ = short2blk(STR_environ);	/* So that we can free it */
+    STR_WORD_CHARS = SAVE(WORD_CHARS);
+
+    HIST = '!';
+    HISTSUB = '^';
+    PRCH = '>';
+    PRCHROOT = '#';
+    word_chars = STR_WORD_CHARS;
+    bslash_quote = 0;		/* PWP: do tcsh-style backslash quoting? */
+
+    /* Default history size to 100 */
+    set(STRhistory, SAVE("100"), VAR_READWRITE);
+
+    tempv = argv;
+    ffile = SAVE(tempv[0]);
+    dolzero = 0;
+    if (eq(ffile, STRaout))	/* A.out's are quittable */
+	quitit = 1;
+    uid = getuid();
+    gid = getgid();
+    euid = geteuid();
+    egid = getegid();
+#if defined(OREO) || defined(DT_SUPPORT)
+    /*
+     * We are a login shell if: 1. we were invoked as -<something> with
+     * optional arguments 2. or we were invoked only with the -l flag
+     */
+    loginsh = (**tempv == '-') || (argc == 2 &&
+				   tempv[1][0] == '-' && tempv[1][1] == 'l' &&
+						tempv[1][2] == '\0');
+#else
+    /*
+     * We are a login shell if: 1. we were invoked as -<something> and we had
+     * no arguments 2. or we were invoked only with the -l flag
+     */
+    loginsh = (**tempv == '-' && argc == 1) || (argc == 2 &&
+				   tempv[1][0] == '-' && tempv[1][1] == 'l' &&
+						tempv[1][2] == '\0');
+#endif
+
+#ifdef _VMS_POSIX
+    /* No better way to find if we are a login shell */
+    if (!loginsh) {
+	loginsh = (argc == 1 && getppid() == 1);
+	**tempv = '-';	/* Avoid giving VMS an acidic stomach */
+    }
+#endif /* _VMS_POSIX */
+
+    if (loginsh && **tempv != '-') {
+	/*
+	 * Mangle the argv space
+	 */
+	tempv[1][0] = '\0';
+	tempv[1][1] = '\0';
+	tempv[1] = NULL;
+	for (tcp = *tempv; *tcp++;)
+	     continue;
+	for (tcp--; tcp >= *tempv; tcp--)
+	    tcp[1] = tcp[0];
+	*++tcp = '-';
+	argc--;
+    }
+    if (loginsh) {
+	(void) time(&chktim);
+	set(STRloginsh, Strsave(STRNULL), VAR_READWRITE);
+    }
+
+    AsciiOnly = 1;
+    NoNLSRebind = getenv("NOREBIND") != NULL;
+#ifdef NLS
+# ifdef SETLOCALEBUG
+    dont_free = 1;
+# endif /* SETLOCALEBUG */
+    (void) setlocale(LC_ALL, "");
+# ifdef LC_COLLATE
+    (void) setlocale(LC_COLLATE, "");
+# endif
+# ifdef SETLOCALEBUG
+    dont_free = 0;
+# endif /* SETLOCALEBUG */
+# ifdef STRCOLLBUG
+    fix_strcoll_bug();
+# endif /* STRCOLLBUG */
+
+    {
+	int     k;
+
+	for (k = 0200; k <= 0377 && !Isprint(k); k++)
+	    continue;
+	AsciiOnly = k > 0377;
+    }
+#else
+    AsciiOnly = getenv("LANG") == NULL && getenv("LC_CTYPE") == NULL;
+#endif				/* NLS */
+    if (MapsAreInited && !NLSMapsAreInited)
+	ed_InitNLSMaps();
+    ResetArrowKeys();
+
+    /*
+     * Initialize for periodic command intervals. Also, initialize the dummy
+     * tty list for login-watch.
+     */
+    (void) time(&t_period);
+#ifndef HAVENOUTMP
+    initwatch();
+#endif /* !HAVENOUTMP */
+
+#if defined(alliant)
+    /*
+     * From:  Jim Pace <jdp@research.att.com>
+     * tcsh does not work properly on the alliants through an rlogin session.
+     * The shell generally hangs.  Also, reference to the controlling terminal
+     * does not work ( ie: echo foo > /dev/tty ).
+     *
+     * A security feature was added to rlogind affecting FX/80's Concentrix
+     * from revision 5.5.xx upwards (through 5.7 where this fix was implemented)
+     * This security change also affects the FX/2800 series.
+     * The security change to rlogind requires the process group of an rlogin
+     * session become disassociated with the tty in rlogind.
+     *
+     * The changes needed are:
+     * 1. set the process group
+     * 2. reenable the control terminal
+     */
+     if (loginsh && isatty(SHIN)) {
+	 ttyn = (char *) ttyname(SHIN);
+	 (void) close(SHIN);
+	 SHIN = open(ttyn, O_RDWR);
+	 shpgrp = getpid();
+	 (void) ioctl (SHIN, TIOCSPGRP, (ioctl_t) &shpgrp);
+	 (void) setpgid(0, shpgrp);
+     }
+#endif /* alliant */
+
+    /*
+     * Move the descriptors to safe places. The variable didfds is 0 while we
+     * have only FSH* to work with. When didfds is true, we have 0,1,2 and
+     * prefer to use these.
+     */
+    initdesc();
+
+    /*
+     * Get and set the tty now
+     */
+    if ((ttyn = ttyname(SHIN)) != NULL) {
+	/*
+	 * Could use rindex to get rid of other possible path components, but
+	 * hpux preserves the subdirectory /pty/ when storing the tty name in
+	 * utmp, so we keep it too.
+	 */
+	if (strncmp(ttyn, "/dev/", 5) == 0)
+	    set(STRtty, cp = SAVE(ttyn + 5), VAR_READWRITE);
+	else
+	    set(STRtty, cp = SAVE(ttyn), VAR_READWRITE);
+    }
+    else
+	set(STRtty, cp = SAVE(""), VAR_READWRITE);
+    /*
+     * Initialize the shell variables. ARGV and PROMPT are initialized later.
+     * STATUS is also munged in several places. CHILD is munged when
+     * forking/waiting
+     */
+
+    /*
+     * 7-10-87 Paul Placeway autologout should be set ONLY on login shells and
+     * on shells running as root.  Out of these, autologout should NOT be set
+     * for any psudo-terminals (this catches most window systems) and not for
+     * any terminal running X windows.
+     * 
+     * At Ohio State, we have had problems with a user having his X session 
+     * drop out from under him (on a Sun) because the shell in his master 
+     * xterm timed out and exited.
+     * 
+     * Really, this should be done with a program external to the shell, that
+     * watches for no activity (and NO running programs, such as dump) on a
+     * terminal for a long peroid of time, and then SIGHUPS the shell on that
+     * terminal.
+     * 
+     * bugfix by Rich Salz <rsalz@PINEAPPLE.BBN.COM>: For root rsh things 
+     * allways first check to see if loginsh or really root, then do things 
+     * with ttyname()
+     * 
+     * Also by Jean-Francois Lamy <lamy%ai.toronto.edu@RELAY.CS.NET>: check the
+     * value of cp before using it! ("root can rsh too")
+     * 
+     * PWP: keep the nested ifs; the order of the tests matters and a good 
+     * (smart) C compiler might re-arange things wrong.
+     */
+#ifdef AUTOLOGOUT
+# ifdef convex
+    if (uid == 0) {
+	/*  root always has a 15 minute autologout  */
+	set(STRautologout, Strsave(STRrootdefautologout), VAR_READWRITE);
+    }
+    else
+	if (loginsh)
+	    /*  users get autologout set to 0  */
+	    set(STRautologout, Strsave(STR0), VAR_READWRITE);
+# else /* convex */
+    if (loginsh || (uid == 0)) {
+	if (*cp) {
+	    /* only for login shells or root and we must have a tty */
+	    if ((cp2 = Strrchr(cp, (Char) '/')) != NULL) {
+		cp = cp2 + 1;
+	    }
+	    else
+		cp2 = cp;
+	    if (!(((Strncmp(cp2, STRtty, 3) == 0) && Isalpha(cp2[3])) ||
+		  ((Strncmp(cp, STRpts, 3) == 0) && cp[3] == '/'))) {
+		if (getenv("DISPLAY") == NULL) {
+		    /* NOT on X window shells */
+		    set(STRautologout, Strsave(STRdefautologout), 
+			VAR_READWRITE);
+		}
+	    }
+	}
+    }
+# endif /* convex */
+#endif /* AUTOLOGOUT */
+
+    (void) sigset(SIGALRM, alrmcatch);
+
+    set(STRstatus, Strsave(STR0), VAR_READWRITE);
+
+    /*
+     * get and set machine specific envirnment variables
+     */
+    getmachine();
+
+    fix_version();		/* publish the shell version */
+
+    /*
+     * Publish the selected echo style
+     */
+#if ECHO_STYLE == NONE_ECHO
+    set(STRecho_style, Strsave(STRnone), VAR_READWRITE);
+#endif /* ECHO_STYLE == NONE_ECHO */
+#if ECHO_STYLE == BSD_ECHO
+    set(STRecho_style, Strsave(STRbsd), VAR_READWRITE);
+#endif /* ECHO_STYLE == BSD_ECHO */
+#if ECHO_STYLE == SYSV_ECHO
+    set(STRecho_style, Strsave(STRsysv), VAR_READWRITE);
+#endif /* ECHO_STYLE == SYSV_ECHO */
+#if ECHO_STYLE == BOTH_ECHO
+    set(STRecho_style, Strsave(STRboth), VAR_READWRITE);
+#endif /* ECHO_STYLE == BOTH_ECHO */
+
+    /*
+     * increment the shell level.
+     */
+    shlvl(1);
+
+    if ((tcp = getenv("HOME")) != NULL)
+	cp = quote(SAVE(tcp));
+    else
+	cp = NULL;
+    if (cp == NULL)
+	fast = 1;		/* No home -> can't read scripts */
+    else
+	set(STRhome, cp, VAR_READWRITE);
+    dinit(cp);			/* dinit thinks that HOME == cwd in a login
+				 * shell */
+    /*
+     * Grab other useful things from the environment. Should we grab
+     * everything??
+     */
+    {
+	char *cln, *cus, *cgr;
+	Char    buff[BUFSIZE];
+	struct passwd *pw;
+	struct group *gr;
+
+
+#ifdef apollo
+	int     oid = getoid();
+
+	(void) Itoa(oid, buff, 0, 0);
+	set(STRoid, Strsave(buff), VAR_READWRITE);
+#endif /* apollo */
+
+	(void) Itoa(uid, buff, 0, 0);
+	set(STRuid, Strsave(buff), VAR_READWRITE);
+
+	(void) Itoa(gid, buff, 0, 0);
+	set(STRgid, Strsave(buff), VAR_READWRITE);
+
+	cln = getenv("LOGNAME");
+	cus = getenv("USER");
+	if (cus != NULL)
+	    set(STRuser, quote(SAVE(cus)), VAR_READWRITE);
+	else if (cln != NULL)
+	    set(STRuser, quote(SAVE(cln)), VAR_READWRITE);
+	else if ((pw = getpwuid(uid)) == NULL)
+	    set(STRuser, SAVE("unknown"), VAR_READWRITE);
+	else
+	    set(STRuser, SAVE(pw->pw_name), VAR_READWRITE);
+	if (cln == NULL)
+	    tsetenv(STRLOGNAME, varval(STRuser));
+	if (cus == NULL)
+	    tsetenv(STRKUSER, varval(STRuser));
+	
+	cgr = getenv("GROUP");
+	if (cgr != NULL)
+	    set(STRgroup, quote(SAVE(cgr)), VAR_READWRITE);
+	else if ((gr = getgrgid(gid)) == NULL)
+	    set(STRgroup, SAVE("unknown"), VAR_READWRITE);
+	else
+	    set(STRgroup, SAVE(gr->gr_name), VAR_READWRITE);
+	if (cgr == NULL)
+	    tsetenv(STRKGROUP, varval(STRgroup));
+    }
+
+    /*
+     * HOST may be wrong, since rexd transports the entire environment on sun
+     * 3.x Just set it again
+     */
+    {
+	char    cbuff[MAXHOSTNAMELEN];
+
+	if (gethostname(cbuff, sizeof(cbuff)) >= 0) {
+	    cbuff[sizeof(cbuff) - 1] = '\0';	/* just in case */
+	    tsetenv(STRHOST, str2short(cbuff));
+	}
+	else
+	    tsetenv(STRHOST, str2short("unknown"));
+    }
+
+
+#ifdef REMOTEHOST
+    /*
+     * Try to determine the remote host we were logged in from.
+     */
+    remotehost();
+#endif /* REMOTEHOST */
+ 
+#ifdef apollo
+    if ((tcp = getenv("SYSTYPE")) == NULL)
+	tcp = "bsd4.3";
+    tsetenv(STRSYSTYPE, quote(str2short(tcp)));
+#endif /* apollo */
+
+    /*
+     * set editing on by default, unless running under Emacs as an inferior
+     * shell.
+     * We try to do this intelligently. If $TERM is available, then it
+     * should determine if we should edit or not. $TERM is preserved
+     * across rlogin sessions, so we will not get confused if we rlogin
+     * under an emacs shell. Another advantage is that if we run an
+     * xterm under an emacs shell, then the $TERM will be set to 
+     * xterm, so we are going to want to edit. Unfortunately emacs
+     * does not restore all the tty modes, so xterm is not very well
+     * set up. But this is not the shell's fault.
+     * Also don't edit if $TERM == wm, for when we're running under an ATK app.
+     * Finally, emacs compiled under terminfo, sets the terminal to dumb,
+     * so disable editing for that too.
+     * 
+     * Unfortunately, in some cases the initial $TERM setting is "unknown",
+     * "dumb", or "network" which is then changed in the user's startup files.
+     * We fix this by setting noediting here if $TERM is unknown/dumb and
+     * if noediting is set, we switch on editing if $TERM is changed.
+     */
+    if ((tcp = getenv("TERM")) != NULL) {
+	set(STRterm, quote(SAVE(tcp)), VAR_READWRITE);
+	noediting = strcmp(tcp, "unknown") == 0 || strcmp(tcp, "dumb") == 0 ||
+		    strcmp(tcp, "network") == 0;
+	editing = strcmp(tcp, "emacs") != 0 && strcmp(tcp, "wm") != 0 &&
+		  !noediting;
+    }
+    else {
+	noediting = 0;
+	editing = ((tcp = getenv("EMACS")) == NULL || strcmp(tcp, "t") != 0);
+    }
+
+    /* 
+     * The 'edit' variable is either set or unset.  It doesn't 
+     * need a value.  Making it 'emacs' might be confusing. 
+     */
+    if (editing)
+	set(STRedit, Strsave(STRNULL), VAR_READWRITE);
+
+
+    /*
+     * still more mutability: make the complete routine automatically add the
+     * suffix of file names...
+     */
+    set(STRaddsuffix, Strsave(STRNULL), VAR_READWRITE);
+
+    /*
+     * Re-initialize path if set in environment
+     */
+    if ((tcp = getenv("PATH")) == NULL)
+#ifdef _PATH_DEFPATH
+	importpath(str2short(_PATH_DEFPATH));
+#else /* !_PATH_DEFPATH */
+	setq(STRpath, defaultpath(), &shvhed, VAR_READWRITE);
+#endif /* _PATH_DEFPATH */
+    else
+	/* Importpath() allocates memory for the path, and the
+	 * returned pointer from SAVE() was discarded, so
+	 * this was a memory leak.. (sg)
+	 *
+	 * importpath(SAVE(tcp));
+	 */
+	importpath(str2short(tcp));
+
+
+    {
+	/* If the SHELL environment variable ends with "tcsh", set
+	 * STRshell to the same path.  This is to facilitate using
+	 * the executable in environments where the compiled-in
+	 * default isn't appropriate (sg).
+	 */
+
+	int sh_len = 0;
+
+	if ((tcp = getenv("SHELL")) != NULL) {
+	    sh_len = strlen(tcp);
+	    if ((sh_len >= 5 && strcmp(tcp + (sh_len - 5), "/tcsh") == 0) || 
+	        (!tcsh && sh_len >= 4 && strcmp(tcp + (sh_len - 4), "/csh") == 0))
+		set(STRshell, quote(SAVE(tcp)), VAR_READWRITE);
+	    else
+		sh_len = 0;
+	}
+	if (sh_len == 0)
+	    set(STRshell, Strsave(STR_SHELLPATH), VAR_READWRITE);
+    }
+
+#ifdef COLOR_LS_F
+    if ((tcp = getenv("LS_COLORS")) != NULL)
+	parseLS_COLORS(str2short(tcp));
+#endif /* COLOR_LS_F */
+
+    doldol = putn((int) getpid());	/* For $$ */
+#ifdef WINNT
+    {
+	char *strtmp1, strtmp2[MAXPATHLEN];
+	if ((strtmp1 = getenv("TMP")) != NULL)
+	    wsprintf(strtmp2, "%s/%s", strtmp1, "sh");
+	shtemp = Strspl(SAVE(strtmp2), doldol);	/* For << */
+    }
+#else /* !WINNT */
+    shtemp = Strspl(STRtmpsh, doldol);	/* For << */
+#endif /* WINNT */
+
+    /*
+     * Record the interrupt states from the parent process. If the parent is
+     * non-interruptible our hand must be forced or we (and our children) won't
+     * be either. Our children inherit termination from our parent. We catch it
+     * only if we are the login shell.
+     */
+#ifdef BSDSIGS
+    /* 
+     * PURIFY-2 claims that osv does not get 
+     * initialized after the sigvec call
+     */
+    setzero((char*) &osv, sizeof(osv));
+    /* parents interruptibility */
+    (void) mysigvec(SIGINT, NULL, &osv);
+    parintr = (signalfun_t) osv.sv_handler;
+    (void) mysigvec(SIGTERM, NULL, &osv);
+    parterm = (signalfun_t) osv.sv_handler;
+#else				/* BSDSIGS */
+    parintr = signal(SIGINT, SIG_IGN);	/* parents interruptibility */
+    (void) sigset(SIGINT, parintr);	/* ... restore */
+
+# ifdef COHERENT
+    if (loginsh) /* it seems that SIGTERM is always set to SIG_IGN by */
+                 /* init/getty so it should be set to SIG_DFL - there may be */
+                 /* a better fix for this. */
+         parterm = SIG_DFL;
+    else
+# else /* !COHERENT */
+    parterm = signal(SIGTERM, SIG_IGN);	/* parents terminability */
+# endif /* COHERENT */
+    (void) sigset(SIGTERM, parterm);	/* ... restore */
+
+#endif /* BSDSIGS */
+
+
+#ifdef TCF
+    /* Enable process migration on ourselves and our progeny */
+    (void) signal(SIGMIGRATE, SIG_DFL);
+#endif /* TCF */
+
+    /*
+     * Process the arguments.
+     * 
+     * Note that processing of -v/-x is actually delayed till after script
+     * processing.
+     * 
+     * We set the first character of our name to be '-' if we are a shell 
+     * running interruptible commands.  Many programs which examine ps'es 
+     * use this to filter such shells out.
+     */
+    argc--, tempv++;
+    while (argc > 0 && (tcp = tempv[0])[0] == '-' &&
+	   *++tcp != '\0' && !batch) {
+	do
+	    switch (*tcp++) {
+
+	    case 0:		/* -	Interruptible, no prompt */
+		prompt = 0;
+		setintr = 1;
+		nofile = 1;
+		break;
+
+	    case 'b':		/* -b	Next arg is input file */
+		batch = 1;
+		break;
+
+	    case 'c':		/* -c	Command input from arg */
+		if (argc == 1)
+		    xexit(0);
+		argc--, tempv++;
+#ifdef M_XENIX
+		/* Xenix Vi bug:
+		   it relies on a 7 bit environment (/bin/sh), so it
+		   pass ascii arguments with the 8th bit set */
+		if (!strcmp(argv[0], "sh"))
+		  {
+		    char *p;
+
+		    for (p = tempv[0]; *p; ++p)
+		      *p &= ASCII;
+		  }
+#endif
+		arginp = SAVE(tempv[0]);
+
+		/*
+		 * we put the command into a variable
+		 */
+		if (arginp != NULL)
+		  set(STRcommand, quote(Strsave(arginp)), VAR_READWRITE);
+
+		/*
+		 * * Give an error on -c arguments that end in * backslash to
+		 * ensure that you don't make * nonportable csh scripts.
+		 */
+		{
+		    register int count;
+
+		    cp = arginp + Strlen(arginp);
+		    count = 0;
+		    while (cp > arginp && *--cp == '\\')
+			++count;
+		    if ((count & 1) != 0) {
+			exiterr = 1;
+			stderror(ERR_ARGC);
+		    }
+		}
+		prompt = 0;
+		nofile = 1;
+		break;
+	    case 'd':		/* -d	Load directory stack from file */
+		rdirs = 1;
+		break;
+
+#ifdef apollo
+	    case 'D':		/* -D	Define environment variable */
+		{
+		    register Char *dp;
+
+		    cp = str2short(tcp);
+		    if (dp = Strchr(cp, '=')) {
+			*dp++ = '\0';
+			tsetenv(cp, dp);
+		    }
+		    else
+			tsetenv(cp, STRNULL);
+		}
+		*tcp = '\0'; 	/* done with this argument */
+		break;
+#endif /* apollo */
+
+	    case 'e':		/* -e	Exit on any error */
+		exiterr = 1;
+		break;
+
+	    case 'f':		/* -f	Fast start */
+		fast = 1;
+		break;
+
+	    case 'i':		/* -i	Interactive, even if !intty */
+		intact = 1;
+		nofile = 1;
+		break;
+
+	    case 'm':		/* -m	read .cshrc (from su) */
+		mflag = 1;
+		break;
+
+	    case 'n':		/* -n	Don't execute */
+		noexec = 1;
+		break;
+
+	    case 'q':		/* -q	(Undoc'd) ... die on quit */
+		quitit = 1;
+		break;
+
+	    case 's':		/* -s	Read from std input */
+		nofile = 1;
+		break;
+
+	    case 't':		/* -t	Read one line from input */
+		onelflg = 2;
+		prompt = 0;
+		nofile = 1;
+		break;
+
+	    case 'v':		/* -v	Echo hist expanded input */
+		nverbose = 1;	/* ... later */
+		break;
+
+	    case 'x':		/* -x	Echo just before execution */
+		nexececho = 1;	/* ... later */
+		break;
+
+	    case 'V':		/* -V	Echo hist expanded input */
+		setNS(STRverbose);	/* NOW! */
+		break;
+
+	    case 'X':		/* -X	Echo just before execution */
+		setNS(STRecho);	/* NOW! */
+		break;
+
+	    case 'F':		/* Undocumented flag */
+		/*
+		 * This will cause children to be created using fork instead of
+		 * vfork.
+		 */
+		use_fork = 1;
+		break;
+
+	    case ' ':
+	    case '\t':
+		/* 
+		 * for O/S's that don't do the argument parsing right in 
+		 * "#!/foo -f " scripts
+		 */
+		break;
+
+	    default:		/* Unknown command option */
+		exiterr = 1;
+		stderror(ERR_TCSHUSAGE, tcp-1, progname);
+		break;
+
+	} while (*tcp);
+	tempv++, argc--;
+    }
+
+    if (quitit)			/* With all due haste, for debugging */
+	(void) signal(SIGQUIT, SIG_DFL);
+
+    /*
+     * Unless prevented by -, -c, -i, -s, or -t, if there are remaining
+     * arguments the first of them is the name of a shell file from which to
+     * read commands.
+     */
+    if (nofile == 0 && argc > 0) {
+	nofile = open(tempv[0], O_RDONLY);
+	if (nofile < 0) {
+	    child = 1;		/* So this ... */
+	    /* ... doesn't return */
+	    stderror(ERR_SYSTEM, tempv[0], strerror(errno));
+	}
+	if (ffile != NULL)
+	    xfree((ptr_t) ffile);
+	dolzero = 1;
+	ffile = SAVE(tempv[0]);
+	/* 
+	 * Replace FSHIN. Handle /dev/std{in,out,err} specially
+	 * since once they are closed we cannot open them again.
+	 * In that case we use our own saved descriptors
+	 */
+	if ((SHIN = dmove(nofile, FSHIN)) < 0) 
+	    switch(nofile) {
+	    case 0:
+		SHIN = FSHIN;
+		break;
+	    case 1:
+		SHIN = FSHOUT;
+		break;
+	    case 2:
+		SHIN = FSHDIAG;
+		break;
+	    default:
+		stderror(ERR_SYSTEM, tempv[0], strerror(errno));
+		break;
+	    }
+	(void) close_on_exec(SHIN, 1);
+	prompt = 0;
+	 /* argc not used any more */ tempv++;
+    }
+
+
+    /*
+     * Consider input a tty if it really is or we are interactive. but not for
+     * editing (christos)
+     */
+    if (!(intty = isatty(SHIN))) {
+	if (adrof(STRedit))
+	    unsetv(STRedit);
+	editing = 0;
+    }
+    intty |= intact;
+#ifndef convex
+    if (intty || (intact && isatty(SHOUT))) {
+	if (!batch && (uid != euid || gid != egid)) {
+	    errno = EACCES;
+	    child = 1;		/* So this ... */
+	    /* ... doesn't return */
+	    stderror(ERR_SYSTEM, progname, strerror(errno));
+	}
+    }
+#endif /* convex */
+    isoutatty = isatty(SHOUT);
+    isdiagatty = isatty(SHDIAG);
+    /*
+     * Decide whether we should play with signals or not. If we are explicitly
+     * told (via -i, or -) or we are a login shell (arg0 starts with -) or the
+     * input and output are both the ttys("csh", or "csh</dev/ttyx>/dev/ttyx")
+     * Note that in only the login shell is it likely that parent may have set
+     * signals to be ignored
+     */
+    if (loginsh || intact || (intty && isatty(SHOUT)))
+	setintr = 1;
+    settell();
+    /*
+     * Save the remaining arguments in argv.
+     */
+    setq(STRargv, blk2short(tempv), &shvhed, VAR_READWRITE);
+
+    /*
+     * Set up the prompt.
+     */
+    if (prompt) {
+	if (tcsh)
+	    set(STRprompt, Strsave(STRdeftcshprompt), VAR_READWRITE);
+	else
+	    set(STRprompt, Strsave(STRdefcshprompt), VAR_READWRITE);
+	/* that's a meta-questionmark */
+	set(STRprompt2, Strsave(STRmquestion), VAR_READWRITE);
+	set(STRprompt3, Strsave(STRKCORRECT), VAR_READWRITE);
+    }
+
+    /*
+     * If we are an interactive shell, then start fiddling with the signals;
+     * this is a tricky game.
+     */
+    shpgrp = mygetpgrp();
+    opgrp = tpgrp = -1;
+    if (setintr) {
+	signalfun_t osig;
+	**argv = '-';
+	if (!quitit)		/* Wary! */
+	    (void) signal(SIGQUIT, SIG_IGN);
+	(void) sigset(SIGINT, pintr);
+	(void) sighold(SIGINT);
+	(void) signal(SIGTERM, SIG_IGN);
+
+	/* 
+	 * No reason I can see not to save history on all these events..
+	 * Most usual occurrence is in a window system, where we're not a login
+	 * shell, but might as well be... (sg)
+	 * But there might be races when lots of shells exit together...
+	 * [this is also incompatible].
+	 * We have to be mre careful here. If the parent wants to 
+	 * ignore the signals then we leave them untouched...
+	 * We also only setup the handlers for shells that are trully
+	 * interactive.
+	 */
+	osig = signal(SIGHUP, phup);	/* exit processing on HUP */
+	if (!loginsh && osig == SIG_IGN)
+	    (void) signal(SIGHUP, osig);
+#ifdef SIGXCPU
+	osig = signal(SIGXCPU, phup);	/* exit processing on XCPU */
+	if (!loginsh && osig == SIG_IGN)
+	    (void) signal(SIGXCPU, osig);
+#endif
+#ifdef SIGXFSZ
+	osig = signal(SIGXFSZ, phup);	/* exit processing on XFSZ */
+	if (!loginsh && osig == SIG_IGN)
+	    (void) signal(SIGXFSZ, osig);
+#endif
+
+	if (quitit == 0 && arginp == 0) {
+#ifdef SIGTSTP
+	    (void) signal(SIGTSTP, SIG_IGN);
+#endif
+#ifdef SIGTTIN
+	    (void) signal(SIGTTIN, SIG_IGN);
+#endif
+#ifdef SIGTTOU
+	    (void) signal(SIGTTOU, SIG_IGN);
+#endif
+	    /*
+	     * Wait till in foreground, in case someone stupidly runs csh &
+	     * dont want to try to grab away the tty.
+	     */
+	    if (isatty(FSHDIAG))
+		f = FSHDIAG;
+	    else if (isatty(FSHOUT))
+		f = FSHOUT;
+	    else if (isatty(OLDSTD))
+		f = OLDSTD;
+	    else
+		f = -1;
+
+#ifdef NeXT
+	    /* NeXT 2.0 /usr/etc/rlogind, does not set our process group! */
+	    if (shpgrp == 0) {
+	        shpgrp = getpid();
+		(void) setpgid(0, shpgrp);
+	        (void) tcsetpgrp(f, shpgrp);
+	    }
+#endif /* NeXT */
+#ifdef BSDJOBS			/* if we have tty job control */
+    retry:
+	    if ((tpgrp = tcgetpgrp(f)) != -1) {
+		if (tpgrp != shpgrp) {
+		    signalfun_t old = signal(SIGTTIN, SIG_DFL);
+		    (void) kill(0, SIGTTIN);
+		    (void) signal(SIGTTIN, old);
+		    goto retry;
+		}
+		/*
+		 * Thanks to Matt Day for the POSIX references, and to
+		 * Paul Close for the SGI clarification.
+		 */
+		if (setdisc(f) != -1) {
+		    opgrp = shpgrp;
+		    shpgrp = getpid();
+		    tpgrp = shpgrp;
+		    if (tcsetpgrp(f, shpgrp) == -1) {
+			/*
+			 * On hpux 7.03 this fails with EPERM. This happens on
+			 * the 800 when opgrp != shpgrp at this point. (we were
+			 * forked from a non job control shell)
+			 * POSIX 7.2.4, says we failed because the process
+			 * group specified did not belong to a process
+			 * in the same session with the tty. So we set our
+			 * process group and try again.
+			 */
+			if (setpgid(0, shpgrp) == -1) {
+			    xprintf("setpgid:");
+			    goto notty;
+			}
+			if (tcsetpgrp(f, shpgrp) == -1) {
+			    xprintf("tcsetpgrp:");
+			    goto notty;
+			}
+		    }
+		    /*
+		     * We check the process group now. If it is the same, then
+		     * we don't need to set it again. On hpux 7.0 on the 300's
+		     * if we set it again it fails with EPERM. This is the
+		     * correct behavior according to POSIX 4.3.3 if the process
+		     * was a session leader .
+		     */
+		    else if (shpgrp != mygetpgrp()) {
+			if(setpgid(0, shpgrp) == -1) {
+			    xprintf("setpgid:");
+			    goto notty;
+			}
+		    }
+#ifdef IRIS4D
+		    /*
+		     * But on irix 3.3 we need to set it again, even if it is
+		     * the same. We do that to tell the system that we
+		     * need BSD process group compatibility.
+		     */
+		    else
+			(void) setpgid(0, shpgrp);
+#endif
+		    (void) close_on_exec(dcopy(f, FSHTTY), 1);
+		}
+		else
+		    tpgrp = -1;
+	    }
+	    if (tpgrp == -1) {
+	notty:
+		xprintf(CGETS(11, 1, "Warning: no access to tty (%s).\n"),
+			strerror(errno));
+		xprintf(CGETS(11, 2, "Thus no job control in this shell.\n"));
+		/*
+		 * Fix from:Sakari Jalovaara <sja@sirius.hut.fi> if we don't
+		 * have access to tty, disable editing too
+		 */
+		if (adrof(STRedit))
+		    unsetv(STRedit);
+		editing = 0;
+	    }
+#else	/* BSDJOBS */		/* don't have job control, so frotz it */
+	    tpgrp = -1;
+#endif				/* BSDJOBS */
+	}
+    }
+    if ((setintr == 0) && (parintr == SIG_DFL))
+	setintr = 1;
+
+/*
+ * SVR4 doesn't send a SIGCHLD when a child is stopped or continued if the
+ * handler is installed with signal(2) or sigset(2).  sigaction(2) must
+ * be used instead.
+ *
+ * David Dawes (dawes@physics.su.oz.au) Sept 1991
+ */
+
+#if SYSVREL > 3
+    {
+	struct sigaction act;
+        act.sa_handler=pchild;
+	(void) sigemptyset(&(act.sa_mask));	/* Don't block any extra sigs
+						 * when the handler is called
+						 */
+        act.sa_flags=0;	           /* want behaviour of sigset() without
+                                    * SA_NOCLDSTOP
+				    */
+
+        if ((sigaction(SIGCHLD,&act,(struct sigaction *)NULL)) == -1)
+	    stderror(ERR_SYSTEM, "sigaction", strerror(errno));
+    }
+#else /* SYSVREL <= 3 */
+    (void) sigset(SIGCHLD, pchild);	/* while signals not ready */
+#endif /* SYSVREL <= 3 */
+
+
+    if (intty && !arginp) 	
+	(void) ed_Setup(editing);/* Get the tty state, and set defaults */
+				 /* Only alter the tty state if editing */
+    
+    /*
+     * Set an exit here in case of an interrupt or error reading the shell
+     * start-up scripts.
+     */
+    reenter = setexit();	/* PWP */
+    haderr = 0;			/* In case second time through */
+    if (!fast && reenter == 0) {
+	/* Will have varval(STRhome) here because set fast if don't */
+	{
+	    int     osetintr = setintr;
+	    signalfun_t oparintr = parintr;
+
+#ifdef BSDSIGS
+	    sigmask_t omask = sigblock(sigmask(SIGINT));
+#else
+	    (void) sighold(SIGINT);
+#endif
+	    setintr = 0;
+	    parintr = SIG_IGN;	/* onintr in /etc/ files has no effect */
+#ifdef LOGINFIRST
+#ifdef _PATH_DOTLOGIN
+	    if (loginsh)
+	      (void) srcfile(_PATH_DOTLOGIN, 0, 0, NULL);
+#endif
+#endif
+
+#ifdef _PATH_DOTCSHRC
+	    (void) srcfile(_PATH_DOTCSHRC, 0, 0, NULL);
+#endif
+	    if (!arginp && !onelflg && !havhash)
+		dohash(NULL,NULL);
+#ifndef LOGINFIRST
+#ifdef _PATH_DOTLOGIN
+	    if (loginsh)
+		(void) srcfile(_PATH_DOTLOGIN, 0, 0, NULL);
+#endif
+#endif
+#ifdef BSDSIGS
+	    (void) sigsetmask(omask);
+#else
+	    (void) sigrelse(SIGINT);
+#endif
+	    setintr = osetintr;
+	    parintr = oparintr;
+	}
+#ifdef LOGINFIRST
+	if (loginsh)
+	    (void) srccat(varval(STRhome), STRsldotlogin);
+#endif
+	/* upward compat. */
+	if (!srccat(varval(STRhome), STRsldottcshrc))
+	    (void) srccat(varval(STRhome), STRsldotcshrc);
+
+	if (!fast && !arginp && !onelflg && !havhash)
+	    dohash(NULL,NULL);
+
+	/*
+	 * Source history before .login so that it is available in .login
+	 */
+	loadhist(NULL, 0);
+#ifndef LOGINFIRST
+	if (loginsh)
+	    (void) srccat(varval(STRhome), STRsldotlogin);
+#endif
+	if (!fast && (loginsh || rdirs))
+	    loaddirs(NULL);
+    }
+    /* Initing AFTER .cshrc is the Right Way */
+    if (intty && !arginp) {	/* PWP setup stuff */
+	ed_Init();		/* init the new line editor */
+#ifdef SIG_WINDOW
+	check_window_size(1);	/* mung environment */
+#endif				/* SIG_WINDOW */
+    }
+
+    /*
+     * dspkanji/dspmbyte autosetting
+     */
+    /* PATCH IDEA FROM Issei.Suzuki VERY THANKS */
+#if defined(DSPMBYTE)
+    if ((tcp = getenv("LANG")) != NULL && !adrof(CHECK_MBYTEVAR)) {
+	autoset_dspmbyte(str2short(tcp));
+    }
+#if defined(WINNT)
+    else if (!adrof(CHECK_MBYTEVAR))
+      nt_autoset_dspmbyte();
+#endif /* WINNT */
+#endif
+
+    /*
+     * Now are ready for the -v and -x flags
+     */
+    if (nverbose)
+	setNS(STRverbose);
+    if (nexececho)
+	setNS(STRecho);
+    
+    /*
+     * All the rest of the world is inside this call. The argument to process
+     * indicates whether it should catch "error unwinds".  Thus if we are a
+     * interactive shell our call here will never return by being blown past on
+     * an error.
+     */
+    process(setintr);
+
+    /*
+     * Mop-up.
+     */
+    if (intty) {
+	if (loginsh) {
+	    xprintf("logout\n");
+	    (void) close(SHIN);
+	    child = 1;
+#ifdef TESLA
+	    do_logout = 1;
+#endif				/* TESLA */
+	    goodbye(NULL, NULL);
+	}
+	else {
+	    xprintf("exit\n");
+	}
+    }
+    record();
+    exitstat();
+    return (0);
+}
+
+void
+untty()
+{
+#ifdef BSDJOBS
+    if (tpgrp > 0 && opgrp != shpgrp) {
+	(void) setpgid(0, opgrp);
+	(void) tcsetpgrp(FSHTTY, opgrp);
+	(void) resetdisc(FSHTTY);
+    }
+#endif /* BSDJOBS */
+}
+
+void
+importpath(cp)
+    Char   *cp;
+{
+    register int i = 0;
+    register Char *dp;
+    register Char **pv;
+    int     c;
+
+    for (dp = cp; *dp; dp++)
+	if (*dp == PATHSEP)
+	    i++;
+    /*
+     * i+2 where i is the number of colons in the path. There are i+1
+     * directories in the path plus we need room for a zero terminator.
+     */
+    pv = (Char **) xcalloc((size_t) (i + 2), sizeof(Char *));
+    dp = cp;
+    i = 0;
+    if (*dp)
+	for (;;) {
+	    if ((c = *dp) == PATHSEP || c == 0) {
+		*dp = 0;
+		pv[i++] = Strsave(*cp ? cp : STRdot);
+		if (c) {
+		    cp = dp + 1;
+		    *dp = PATHSEP;
+		}
+		else
+		    break;
+	    }
+#ifdef WINNT
+	    else if (*dp == '\\')
+		*dp = '/';
+#endif /* WINNT */
+	    dp++;
+	}
+    pv[i] = 0;
+    setq(STRpath, pv, &shvhed, VAR_READWRITE);
+}
+
+/*
+ * Source to the file which is the catenation of the argument names.
+ */
+static int
+srccat(cp, dp)
+    Char   *cp, *dp;
+{
+    if (cp[0] == '/' && cp[1] == '\0') 
+	return srcfile(short2str(dp), (mflag ? 0 : 1), 0, NULL);
+    else {
+	register Char *ep;
+	char   *ptr;
+	int rv;
+
+#ifdef WINNT
+	ep = cp;
+	while(*ep)
+	    ep++;
+	if (ep[-1] == '/' && dp[0] == '/') /* silly win95 */
+	    dp++;
+#endif /* WINNT */
+
+	ep = Strspl(cp, dp);
+	ptr = short2str(ep);
+
+	rv = srcfile(ptr, (mflag ? 0 : 1), 0, NULL);
+	xfree((ptr_t) ep);
+	return rv;
+    }
+}
+
+/*
+ * Source to a file putting the file descriptor in a safe place (> 2).
+ */
+static int
+srcfile(f, onlyown, flag, av)
+    char   *f;
+    bool    onlyown;
+    int flag;
+    Char **av;
+{
+    register int unit;
+
+    if ((unit = open(f, O_RDONLY)) == -1) 
+	return 0;
+    unit = dmove(unit, -1);
+
+    (void) close_on_exec(unit, 1);
+    srcunit(unit, onlyown, flag, av);
+    return 1;
+}
+
+
+/*
+ * Save the shell state, and establish new argument vector, and new input
+ * fd.
+ */
+static void
+st_save(st, unit, hflg, al, av)
+    struct saved_state *st;
+    int unit, hflg;
+    Char **al, **av;
+{
+    st->insource	= insource;
+    st->SHIN		= SHIN;
+    st->intty		= intty;
+    st->whyles		= whyles;
+    st->gointr		= gointr;
+    st->arginp		= arginp;
+    st->evalp		= evalp;
+    st->evalvec		= evalvec;
+    st->alvecp		= alvecp;
+    st->alvec		= alvec;
+    st->onelflg		= onelflg;
+    st->enterhist	= enterhist;
+    if (hflg)
+	st->HIST	= HIST;
+    else
+	st->HIST	= '\0';
+    st->cantell		= cantell;
+    cpybin(st->B, B);
+
+    /*
+     * we can now pass arguments to source. 
+     * For compatibility we do that only if arguments were really
+     * passed, otherwise we keep the old, global $argv like before.
+     */
+    if (av != NULL && *av != NULL) {
+	struct varent *vp;
+	if ((vp = adrof(STRargv)) != NULL)
+	    st->argv = saveblk(vp->vec);
+	else
+	    st->argv = NULL;
+	setq(STRargv, saveblk(av), &shvhed, VAR_READWRITE);
+    }
+    else
+	st->argv = NULL;
+
+    SHIN	= unit;	/* Do this first */
+
+    /* Establish new input arena */
+    {
+	fbuf = NULL;
+	fseekp = feobp = fblocks = 0;
+	settell();
+    }
+
+    arginp	= 0;
+    onelflg	= 0;
+    intty	= isatty(SHIN);
+    whyles	= 0;
+    gointr	= 0;
+    evalvec	= 0;
+    evalp	= 0;
+    alvec	= al;
+    alvecp	= 0;
+    enterhist	= hflg;
+    if (enterhist)
+	HIST	= '\0';
+    insource	= 1;
+}
+
+
+/*
+ * Restore the shell to a saved state
+ */
+static void
+st_restore(st, av)
+    struct saved_state *st;
+    Char **av;
+{
+    if (st->SHIN == -1)
+	return;
+
+    /* Reset input arena */
+    {
+	register int i;
+	register Char** nfbuf = fbuf;
+	register int nfblocks = fblocks;
+
+	fblocks = 0;
+	fbuf = NULL;
+	for (i = 0; i < nfblocks; i++)
+	    xfree((ptr_t) nfbuf[i]);
+	xfree((ptr_t) nfbuf);
+    }
+    cpybin(B, st->B);
+
+    (void) close(SHIN);
+
+    insource	= st->insource;
+    SHIN	= st->SHIN;
+    arginp	= st->arginp;
+    onelflg	= st->onelflg;
+    evalp	= st->evalp;
+    evalvec	= st->evalvec;
+    alvecp	= st->alvecp;
+    alvec	= st->alvec;
+    intty	= st->intty;
+    whyles	= st->whyles;
+    gointr	= st->gointr;
+    if (st->HIST != '\0')
+	HIST	= st->HIST;
+    enterhist	= st->enterhist;
+    cantell	= st->cantell;
+
+    if (st->argv != NULL)
+	setq(STRargv, st->argv, &shvhed, VAR_READWRITE);
+    else if (av != NULL  && *av != NULL && adrof(STRargv) != NULL)
+	unsetv(STRargv);
+}
+
+/*
+ * Source to a unit.  If onlyown it must be our file or our group or
+ * we don't chance it.	This occurs on ".cshrc"s and the like.
+ */
+static void
+srcunit(unit, onlyown, hflg, av)
+    register int unit;
+    bool    onlyown;
+    int hflg;
+    Char **av;
+{
+    struct saved_state st;
+    st.SHIN = -1;	/* st_restore checks this */
+
+    if (unit < 0)
+	return;
+
+    if (didfds)
+	donefds();
+
+    if (onlyown) {
+	struct stat stb;
+
+	if (fstat(unit, &stb) < 0) {
+	    (void) close(unit);
+	    return;
+	}
+    }
+
+    getexit(st.oldexit);
+
+    if (setintr)
+#ifdef BSDSIGS
+	st.mask = sigblock(sigmask(SIGINT));
+#else
+	(void) sighold(SIGINT);
+#endif
+
+    /* Save the current state and move us to a new state */
+    st_save(&st, unit, hflg, NULL, av);
+
+    /*
+     * Now if we are allowing commands to be interrupted, we let ourselves be
+     * interrupted.
+     */
+    if (setintr)
+#ifdef BSDSIGS
+	(void) sigsetmask(st.mask);
+#else
+	(void) sigrelse(SIGINT);
+#endif
+
+    /*
+     * Bugfix for running out of memory by: Jak Kirman
+     * <jak%cs.brown.edu@RELAY.CS.NET>.  Solution: pay attention to what
+     * setexit() is returning because reenter _may_ be in a register, and
+     * thus restored to 0 on a longjump(). (PWP: insert flames about
+     * compiler-dependant code here) PWP: THANKS LOTS !!!
+     *
+     * PWP: think of this as like a LISP (unwind-protect ...)
+     * thanks to Diana Smetters for pointing out how this _should_ be written
+     */
+#ifdef cray
+    st.reenter = 1;		/* assume non-zero return val */
+    if (setexit() == 0) {
+	st.reenter = 0;		/* Oh well, we were wrong */
+#else
+    if ((st.reenter = setexit()) == 0) {
+#endif
+	process(0);		/* 0 -> blow away on errors */
+    }
+
+    if (setintr)
+#ifdef BSDSIGS
+	(void) sigsetmask(st.mask);
+#else
+	(void) sigrelse(SIGINT);
+#endif
+
+    /* Restore the old state */
+    st_restore(&st, av);
+    resexit(st.oldexit);
+    /*
+     * If process reset() (effectively an unwind) then we must also unwind.
+     */
+    if (st.reenter)
+	stderror(ERR_SILENT);
+}
+
+
+/*ARGSUSED*/
+void
+goodbye(v, c)
+    Char **v;
+    struct command *c;
+{
+    USE(c);
+    record();
+
+    if (loginsh) {
+	(void) sigset(SIGQUIT, SIG_IGN);
+	(void) sigset(SIGINT, SIG_IGN);
+	(void) sigset(SIGTERM, SIG_IGN);
+	(void) sigset(SIGHUP, SIG_IGN);
+	setintr = 0;		/* No interrupts after "logout" */
+	/* Trap errors inside .logout */
+	reenter = setexit();
+	if (reenter != 0)
+	    exitstat();
+	if (!(adrof(STRlogout)))
+	    set(STRlogout, Strsave(STRnormal), VAR_READWRITE);
+#ifdef _PATH_DOTLOGOUT
+	(void) srcfile(_PATH_DOTLOGOUT, 0, 0, NULL);
+#endif
+	if (adrof(STRhome))
+	    (void) srccat(varval(STRhome), STRsldtlogout);
+#ifdef TESLA
+	do_logout = 1;
+#endif /* TESLA */
+    }
+    exitstat();
+}
+
+void
+exitstat()
+{
+#ifdef PROF
+    monitor(0);
+#endif
+    /*
+     * Note that if STATUS is corrupted (i.e. getn bombs) then error will exit
+     * directly because we poke child here. Otherwise we might continue
+     * unwarrantedly (sic).
+     */
+    child = 1;
+
+    xexit(getn(varval(STRstatus)));
+}
+
+/*
+ * in the event of a HUP we want to save the history
+ */
+static  sigret_t
+phup(snum)
+int snum;
+{
+    /*
+     * There is no return from here,
+     * so we are not going to release SIGHUP
+     * anymore
+     */
+#ifdef UNRELSIGS
+    if (snum)
+	(void) sigset(snum, SIG_IGN);
+#else
+# ifdef BSDSIGS
+    (void) sigblock(sigmask(SIGHUP));
+# else
+    (void) sighold(SIGHUP);
+# endif /* BSDSIGS */
+#endif /* UNRELSIGS */
+
+    if (loginsh) {
+	set(STRlogout, Strsave(STRhangup), VAR_READWRITE);
+#ifdef _PATH_DOTLOGOUT
+	(void) srcfile(_PATH_DOTLOGOUT, 0, 0, NULL);
+#endif
+	if (adrof(STRhome))
+	    (void) srccat(varval(STRhome), STRsldtlogout);
+    }
+
+    record();
+
+#ifdef POSIXJOBS 
+    /*
+     * We kill the last foreground process group. It then becomes
+     * responsible to propagate the SIGHUP to its progeny. 
+     */
+    {
+	struct process *pp, *np;
+
+	for (pp = proclist.p_next; pp; pp = pp->p_next) {
+	    np = pp;
+	    /* 
+	     * Find if this job is in the foreground. It could be that
+	     * the process leader has exited and the foreground flag
+	     * is cleared for it.
+	     */
+	    do 
+		/*
+		 * If a process is in the foreground we try to kill
+		 * it's process group. If we succeed, then the 
+		 * whole job is gone. Otherwise we keep going...
+		 * But avoid sending HUP to the shell again.
+		 */
+		if (((np->p_flags & PFOREGND) != 0) && np->p_jobid != shpgrp) {
+		    np->p_flags &= ~PHUP;
+		    if (killpg(np->p_jobid, SIGHUP) != -1) {
+			/* In case the job was suspended... */
+#ifdef SIGCONT
+			(void) killpg(np->p_jobid, SIGCONT);
+#endif
+			break;
+		    }
+		}
+	    while ((np = np->p_friends) != pp);
+	}
+    }
+#endif /* POSIXJOBS */
+
+    xexit(snum);
+#ifndef SIGVOID
+    return (snum);
+#endif
+}
+
+static Char   *jobargv[2] = {STRjobs, 0};
+
+/*
+ * Catch an interrupt, e.g. during lexical input.
+ * If we are an interactive shell, we reset the interrupt catch
+ * immediately.  In any case we drain the shell output,
+ * and finally go through the normal error mechanism, which
+ * gets a chance to make the shell go away.
+ */
+int     just_signaled;		/* bugfix by Michael Bloom (mg@ttidca.TTI.COM) */
+
+#ifdef SIGVOID
+/*ARGSUSED*/
+#endif
+sigret_t
+pintr(snum)
+int snum;
+{
+#ifdef UNRELSIGS
+    if (snum)
+	(void) sigset(snum, pintr);
+#endif /* UNRELSIGS */
+    just_signaled = 1;
+    pintr1(1);
+#ifndef SIGVOID
+    return (snum);
+#endif
+}
+
+void
+pintr1(wantnl)
+    bool    wantnl;
+{
+    register Char **v;
+#ifdef BSDSIGS
+    sigmask_t omask;
+#endif
+
+#ifdef BSDSIGS
+    omask = sigblock((sigmask_t) 0);
+#endif
+    if (setintr) {
+#ifdef BSDSIGS
+	(void) sigsetmask(omask & ~sigmask(SIGINT));
+#else
+	(void) sigrelse(SIGINT);
+#endif
+	if (pjobs) {
+	    pjobs = 0;
+	    xputchar('\n');
+	    dojobs(jobargv, NULL);
+	    stderror(ERR_NAME | ERR_INTR);
+	}
+    }
+    /* MH - handle interrupted completions specially */
+    {
+	extern int InsideCompletion;
+
+	if (InsideCompletion)
+	    stderror(ERR_SILENT);
+    }
+    /* JV - Make sure we shut off inputl */
+    {
+	extern Char GettingInput;
+
+	(void) Cookedmode();
+	GettingInput = 0;
+    }
+#ifdef BSDSIGS
+    (void) sigsetmask(omask & ~sigmask(SIGCHLD));
+#else
+    if (setintr)
+	(void) sighold(SIGINT);
+    (void) sigrelse(SIGCHLD);
+#endif
+    drainoline();
+#if !defined(_VMS_POSIX) && !defined(WINNT)
+    (void) endpwent();
+#endif /* !_VMS_POSIX && !WINNT */
+
+    /*
+     * If we have an active "onintr" then we search for the label. Note that if
+     * one does "onintr -" then we shan't be interruptible so we needn't worry
+     * about that here.
+     */
+    if (gointr) {
+	gotolab(gointr);
+	timflg = 0;
+	if ((v = pargv) != 0)
+	    pargv = 0, blkfree(v);
+	if ((v = gargv) != 0)
+	    gargv = 0, blkfree(v);
+	reset();
+    }
+    else if (intty && wantnl) {
+	if (editing) {
+	    /* 
+	     * If we are editing a multi-line input command, and move to
+	     * the beginning of the line, we don't want to trash it when
+	     * we hit ^C
+	     */
+	    PastBottom();
+	    ClearLines();
+	    ClearDisp();
+	}
+	else {
+	    /* xputchar('\n'); *//* Some like this, others don't */
+	    (void) putraw('\r');
+	    (void) putraw('\n');
+	}
+    }
+    stderror(ERR_SILENT);
+}
+
+/*
+ * Process is the main driving routine for the shell.
+ * It runs all command processing, except for those within { ... }
+ * in expressions (which is run by a routine evalav in sh.exp.c which
+ * is a stripped down process), and `...` evaluation which is run
+ * also by a subset of this code in sh.glob.c in the routine backeval.
+ *
+ * The code here is a little strange because part of it is interruptible
+ * and hence freeing of structures appears to occur when none is necessary
+ * if this is ignored.
+ *
+ * Note that if catch is not set then we will unwind on any error.
+ * If an end-of-file occurs, we return.
+ */
+static struct command *savet = NULL;
+void
+process(catch)
+    bool    catch;
+{
+    extern char Expand;
+    jmp_buf_t osetexit;
+    /* PWP: This might get nuked my longjmp so don't make it a register var */
+    struct command *t = savet;
+
+    savet = NULL;
+    getexit(osetexit);
+    for (;;) {
+
+	pendjob();
+
+	/* This was leaking memory badly, particularly when sourcing
+	 * files, etc.. For whatever reason we were arriving here with
+	 * allocated pointers still active, and the code was simply
+	 * overwriting them.  I can't say I fully understand the
+	 * control flow here, but according to Purify this particular
+	 * leak has been plugged, and I haven't noticed any ill
+	 * effects.. (sg)
+	 */
+	if (paraml.next && paraml.next != &paraml)
+	    freelex(&paraml);
+
+	paraml.next = paraml.prev = &paraml;
+	paraml.word = STRNULL;
+	(void) setexit();
+	justpr = enterhist;	/* execute if not entering history */
+
+	/*
+	 * Interruptible during interactive reads
+	 */
+	if (setintr)
+#ifdef BSDSIGS
+	    (void) sigsetmask(sigblock((sigmask_t) 0) & ~sigmask(SIGINT));
+#else
+	    (void) sigrelse(SIGINT);
+#endif
+
+
+	/*
+	 * For the sake of reset()
+	 */
+	freelex(&paraml);
+	if (savet)
+	    freesyn(savet), savet = NULL;
+
+	if (haderr) {
+	    if (!catch) {
+		/* unwind */
+		doneinp = 0;
+		savet = t;
+		resexit(osetexit);
+		reset();
+	    }
+	    haderr = 0;
+	    /*
+	     * Every error is eventually caught here or the shell dies.  It is
+	     * at this point that we clean up any left-over open files, by
+	     * closing all but a fixed number of pre-defined files.  Thus
+	     * routines don't have to worry about leaving files open due to
+	     * deeper errors... they will get closed here.
+	     */
+	    closem();
+	    continue;
+	}
+	if (doneinp) {
+	    doneinp = 0;
+	    break;
+	}
+	if (chkstop)
+	    chkstop--;
+	if (neednote)
+	    pnote();
+	if (intty && prompt && evalvec == 0) {
+	    just_signaled = 0;
+	    mailchk();
+	    /*
+	     * Watch for logins/logouts. Next is scheduled commands stored
+	     * previously using "sched." Then execute periodic commands.
+	     * Following that, the prompt precmd is run.
+	     */
+#ifndef HAVENOUTMP
+	    watch_login(0);
+#endif /* !HAVENOUTMP */
+	    sched_run(0);
+	    period_cmd();
+	    precmd();
+	    /*
+	     * If we are at the end of the input buffer then we are going to
+	     * read fresh stuff. Otherwise, we are rereading input and don't
+	     * need or want to prompt.
+	     */
+	    if (fseekp == feobp && aret == F_SEEK)
+		printprompt(0, NULL);
+	    flush();
+	    setalarm(1);
+	}
+	if (seterr) {
+	    xfree((ptr_t) seterr);
+	    seterr = NULL;
+	}
+
+	/*
+	 * Echo not only on VERBOSE, but also with history expansion. If there
+	 * is a lexical error then we forego history echo.
+	 */
+	if ((lex(&paraml) && !seterr && intty && !tellwhat && !Expand && 
+	     !whyles) || adrof(STRverbose)) {
+	    haderr = 1;
+	    prlex(&paraml);
+	    haderr = 0;
+	}
+	(void) alarm(0);	/* Autologout OFF */
+
+	/*
+	 * The parser may lose space if interrupted.
+	 */
+	if (setintr)
+#ifdef BSDSIGS
+	    (void) sigblock(sigmask(SIGINT));
+#else
+	    (void) sighold(SIGINT);
+#endif
+
+	/*
+	 * Save input text on the history list if reading in old history, or it
+	 * is from the terminal at the top level and not in a loop.
+	 * 
+	 * PWP: entry of items in the history list while in a while loop is done
+	 * elsewhere...
+	 */
+	if (enterhist || (catch && intty && !whyles && !tellwhat && !arun))
+	    savehist(&paraml, enterhist > 1);
+
+	if (Expand && seterr)
+	    Expand = 0;
+
+	/*
+	 * Print lexical error messages, except when sourcing history lists.
+	 */
+	if (!enterhist && seterr)
+	    stderror(ERR_OLD);
+
+	/*
+	 * If had a history command :p modifier then this is as far as we
+	 * should go
+	 */
+	if (justpr)
+	    reset();
+
+	/*
+	 * If had a tellwhat from twenex() then do
+	 */
+	if (tellwhat) {
+	    (void) tellmewhat(&paraml, NULL);
+	    reset();
+	}
+
+	alias(&paraml);
+
+#ifdef BSDJOBS
+	/*
+	 * If we are interactive, try to continue jobs that we have stopped
+	 */
+	if (prompt)
+	    continue_jobs(&paraml);
+#endif				/* BSDJOBS */
+
+	/*
+	 * Check to see if the user typed "rm * .o" or something
+	 */
+	if (prompt)
+	    rmstar(&paraml);
+	/*
+	 * Parse the words of the input into a parse tree.
+	 */
+	savet = syntax(paraml.next, &paraml, 0);
+	if (seterr)
+	    stderror(ERR_OLD);
+
+	postcmd();
+	/*
+	 * Execute the parse tree From: Michael Schroeder
+	 * <mlschroe@immd4.informatik.uni-erlangen.de> was execute(t, tpgrp);
+	 */
+	execute(savet, (tpgrp > 0 ? tpgrp : -1), NULL, NULL);
+
+	/*
+	 * Made it!
+	 */
+	freelex(&paraml);
+	freesyn(savet), savet = NULL;
+#ifdef SIG_WINDOW
+	if (catch && intty && !whyles && !tellwhat)
+	    (void) window_change(0);	/* for window systems */
+#endif /* SIG_WINDOW */
+	set(STR_, Strsave(InputBuf), VAR_READWRITE | VAR_NOGLOB);
+    }
+    savet = t;
+    resexit(osetexit);
+}
+
+/*ARGSUSED*/
+void
+dosource(t, c)
+    register Char **t;
+    struct command *c;
+{
+    register Char *f;
+    bool    hflg = 0;
+    extern int bequiet;
+    char    buf[BUFSIZE];
+
+    USE(c);
+    t++;
+    if (*t && eq(*t, STRmh)) {
+	if (*++t == NULL)
+	    stderror(ERR_NAME | ERR_HFLAG);
+	hflg++;
+    }
+    else if (*t && eq(*t, STRmm)) {
+    	if (*++t == NULL)
+	    stderror(ERR_NAME | ERR_MFLAG);
+	hflg = 2;
+    }
+
+    f = globone(*t++, G_ERROR);
+    (void) strcpy(buf, short2str(f));
+    xfree((ptr_t) f);
+    if ((!srcfile(buf, 0, hflg, t)) && (!hflg) && (!bequiet))
+	stderror(ERR_SYSTEM, buf, strerror(errno));
+}
+
+/*
+ * Check for mail.
+ * If we are a login shell, then we don't want to tell
+ * about any mail file unless its been modified
+ * after the time we started.
+ * This prevents us from telling the user things he already
+ * knows, since the login program insists on saying
+ * "You have mail."
+ */
+
+/*
+ * The AMS version.
+ * This version checks if the file is a directory, and if so,
+ * tells you the number of files in it, otherwise do the old thang.
+ * The magic "+1" in the time calculation is to compensate for
+ * an AFS bug where directory mtimes are set to 1 second in
+ * the future.
+ */
+
+static void
+mailchk()
+{
+    register struct varent *v;
+    register Char **vp;
+    time_t  t;
+    int     intvl, cnt;
+    struct stat stb;
+    bool    new;
+
+    v = adrof(STRmail);
+    if (v == 0)
+	return;
+    (void) time(&t);
+    vp = v->vec;
+    cnt = blklen(vp);
+    intvl = (cnt && number(*vp)) ? (--cnt, getn(*vp++)) : MAILINTVL;
+    if (intvl < 1)
+	intvl = 1;
+    if (chktim + intvl > t)
+	return;
+    for (; *vp; vp++) {
+	char *filename = short2str(*vp);
+	char *mboxdir = filename;
+
+	if (stat(filename, &stb) < 0)
+	    continue;
+#if defined(BSDTIMES) || defined(_SEQUENT_)
+	new = stb.st_mtime > time0.tv_sec;
+#else
+	new = stb.st_mtime > time0;
+#endif
+	if (S_ISDIR(stb.st_mode)) {
+	    DIR *mailbox;
+	    int mailcount = 0;
+	    char tempfilename[MAXPATHLEN];
+	    struct stat stc;
+
+	    xsnprintf(tempfilename, MAXPATHLEN, "%s/new", filename);
+
+	    if (stat(tempfilename, &stc) != -1 && S_ISDIR(stc.st_mode)) {
+		/*
+		 * "filename/new" exists and is a directory; you are
+		 * using Qmail.
+		 */
+		stb = stc;
+#if defined(BSDTIMES) || defined(_SEQUENT_)
+		new = stb.st_mtime > time0.tv_sec;
+#else
+		new = stb.st_mtime > time0;
+#endif
+		mboxdir = tempfilename;
+	    }
+
+	    if (stb.st_mtime <= chktim + 1 || (loginsh && !new))
+		continue;
+
+	    if ((mailbox = opendir(mboxdir)) == NULL)
+		continue;
+
+	    /* skip . and .. */
+	    if (!readdir(mailbox) || !readdir(mailbox))
+		continue;
+
+	    while (readdir(mailbox))
+		mailcount++;
+
+	    if (mailcount == 0)
+		continue;
+
+	    if (cnt == 1)
+		xprintf(CGETS(11, 3, "You have %d mail messages.\n"),
+			mailcount);
+	    else
+		xprintf(CGETS(11, 4, "You have %d mail messages in %s.\n"),
+			mailcount, filename);
+	}
+	else {
+	    if (stb.st_size == 0 || stb.st_atime > stb.st_mtime ||
+		(stb.st_atime <= chktim && stb.st_mtime <= chktim) ||
+		(loginsh && !new))
+		continue;
+	    if (cnt == 1)
+		xprintf(CGETS(11, 5, "You have %smail.\n"),
+			new ? CGETS(11, 6, "new ") : "");
+	    else
+	        xprintf(CGETS(11, 7, "You have %smail in %s.\n"),
+			new ? CGETS(11, 6, "new ") : "", filename);
+	}
+    }
+    chktim = t;
+}
+
+/*
+ * Extract a home directory from the password file
+ * The argument points to a buffer where the name of the
+ * user whose home directory is sought is currently.
+ * We write the home directory of the user back there.
+ */
+int
+gethdir(home)
+    Char   *home;
+{
+    Char   *h;
+
+    /*
+     * Is it us?
+     */
+    if (*home == '\0') {
+	if ((h = varval(STRhome)) != STRNULL) {
+	    (void) Strcpy(home, h);
+	    return 0;
+	}
+	else
+	    return 1;
+    }
+
+    /*
+     * Look in the cache
+     */
+    if ((h = gettilde(home)) == NULL)
+	return 1;
+    else {
+	(void) Strcpy(home, h);
+	return 0;
+    }
+}
+
+/*
+ * Move the initial descriptors to their eventual
+ * resting places, closing all other units.
+ */
+void
+initdesc()
+{
+#ifdef NLS_BUGS
+#ifdef NLS_CATALOGS
+    (void)catclose(catd);
+#endif /* NLS_CATALOGS */
+#endif /* NLS_BUGS */
+
+
+    didfds = 0;			/* 0, 1, 2 aren't set up */
+    (void) close_on_exec(SHIN = dcopy(0, FSHIN), 1);
+    (void) close_on_exec(SHOUT = dcopy(1, FSHOUT), 1);
+    (void) close_on_exec(SHDIAG = dcopy(2, FSHDIAG), 1);
+    (void) close_on_exec(OLDSTD = dcopy(SHIN, FOLDSTD), 1);
+#ifndef CLOSE_ON_EXEC
+    didcch = 0;			/* Havent closed for child */
+#endif /* CLOSE_ON_EXEC */
+    isdiagatty = isatty(SHDIAG);
+    isoutatty = isatty(SHOUT);
+    closem();
+#ifdef NLS_BUGS
+#ifdef NLS_CATALOGS
+    nlsinit();
+#endif /* NLS_CATALOGS */
+#endif /* NLS_BUGS */
+}
+
+
+void
+#ifdef PROF
+done(i)
+#else
+xexit(i)
+#endif
+    int     i;
+{
+#ifdef TESLA
+    if (loginsh && do_logout) {
+	/* this is to send hangup signal to the develcon */
+	/* we toggle DTR. clear dtr - sleep 1 - set dtr */
+	/* ioctl will return ENOTTY for pty's but we ignore it 	 */
+	/* exitstat will run after disconnect */
+	/* we sleep for 2 seconds to let things happen in */
+	/* .logout and rechist() */
+#ifdef TIOCCDTR
+	(void) sleep(2);
+	(void) ioctl(FSHTTY, TIOCCDTR, NULL);
+	(void) sleep(1);
+	(void) ioctl(FSHTTY, TIOCSDTR, NULL);
+#endif /* TIOCCDTR */
+    }
+#endif /* TESLA */
+
+    {
+	struct process *pp, *np;
+
+	/* Kill all processes marked for hup'ing */
+	for (pp = proclist.p_next; pp; pp = pp->p_next) {
+	    np = pp;
+	    do 
+		if ((np->p_flags & PHUP) && np->p_jobid != shpgrp) {
+		    if (killpg(np->p_jobid, SIGHUP) != -1) {
+			/* In case the job was suspended... */
+#ifdef SIGCONT
+			(void) killpg(np->p_jobid, SIGCONT);
+#endif
+			break;
+		    }
+		}
+	    while ((np = np->p_friends) != pp);
+	}
+    }
+    untty();
+#ifdef NLS_CATALOGS
+    /*
+     * We need to call catclose, because SVR4 leaves symlinks behind otherwise
+     * in the catalog directories. We cannot close on a vforked() child,
+     * because messages will stop working on the parent too.
+     */
+    if (child == 0)
+	(void) catclose(catd);
+#endif /* NLS_CATALOGS */
+#ifdef WINNT
+    nt_cleanup();
+#endif /* WINNT */
+    _exit(i);
+}
+
+#ifndef _PATH_DEFPATH
+static Char **
+defaultpath()
+{
+    char   *ptr;
+    Char  **blk, **blkp;
+    struct stat stb;
+
+    blkp = blk = (Char **) xmalloc((size_t) sizeof(Char *) * 10);
+
+#ifndef NODOT
+# ifndef DOTLAST
+    *blkp++ = Strsave(STRdot);
+# endif
+#endif
+
+#define DIRAPPEND(a)  \
+	if (stat(ptr = a, &stb) == 0 && S_ISDIR(stb.st_mode)) \
+		*blkp++ = SAVE(ptr)
+
+#ifdef _PATH_LOCAL
+    DIRAPPEND(_PATH_LOCAL);
+#endif
+
+#ifdef _PATH_USRUCB
+    DIRAPPEND(_PATH_USRUCB);
+#endif
+
+#ifdef _PATH_USRBSD
+    DIRAPPEND(_PATH_USRBSD);
+#endif
+
+#ifdef _PATH_BIN
+    DIRAPPEND(_PATH_BIN);
+#endif
+
+#ifdef _PATH_USRBIN
+    DIRAPPEND(_PATH_USRBIN);
+#endif
+
+#undef DIRAPPEND
+
+#ifndef NODOT
+# ifdef DOTLAST
+    *blkp++ = Strsave(STRdot);
+# endif
+#endif
+    *blkp = NULL;
+    return (blk);
+}
+#endif
+
+static void
+record()
+{
+    if (!fast) {
+	recdirs(NULL, adrof(STRsavedirs) != NULL);
+	rechist(NULL, adrof(STRsavehist) != NULL);
+    }
+}