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Revision 12041, 58.2 KB checked in by danw, 26 years ago (diff)
Merge in changes that weren't obsoleted by later tcsh bugfixes or dotfile changes

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1	/* $Header: /afs/dev.mit.edu/source/repository/third/tcsh/sh.c,v 1.3 1998-10-04 01:39:28 danw Exp $ */
2	/*
3	* sh.c: Main shell routines
4	*/
5	/*-
6	* Copyright (c) 1980, 1991 The Regents of the University of California.
7	* All rights reserved.
8	*
9	* Redistribution and use in source and binary forms, with or without
10	* modification, are permitted provided that the following conditions
11	* are met:
12	* 1. Redistributions of source code must retain the above copyright
13	* notice, this list of conditions and the following disclaimer.
14	* 2. Redistributions in binary form must reproduce the above copyright
15	* notice, this list of conditions and the following disclaimer in the
16	* documentation and/or other materials provided with the distribution.
17	* 3. All advertising materials mentioning features or use of this software
18	* must display the following acknowledgement:
19	* This product includes software developed by the University of
20	* California, Berkeley and its contributors.
21	* 4. Neither the name of the University nor the names of its contributors
22	* may be used to endorse or promote products derived from this software
23	* without specific prior written permission.
24	*
25	* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
26	* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
27	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
28	* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
29	* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
30	* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
31	* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
32	* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
33	* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
34	* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
35	* SUCH DAMAGE.
36	*/
37	#define EXTERN /* Intern */
38	#include "sh.h"
39
40	#ifndef lint
41	char copyright[] =
42	"@(#) Copyright (c) 1991 The Regents of the University of California.\n\
43	All rights reserved.\n";
44	#endif /* not lint */
45
46	RCSID("$Id: sh.c,v 1.3 1998-10-04 01:39:28 danw Exp $")
47
48	#include "tc.h"
49	#include "ed.h"
50	#include "tw.h"
51
52	extern bool MapsAreInited;
53	extern bool NLSMapsAreInited;
54	extern bool NoNLSRebind;
55
56	/*
57	* C Shell
58	*
59	* Bill Joy, UC Berkeley, California, USA
60	* October 1978, May 1980
61	*
62	* Jim Kulp, IIASA, Laxenburg, Austria
63	* April 1980
64	*
65	* Filename recognition added:
66	* Ken Greer, Ind. Consultant, Palo Alto CA
67	* October 1983.
68	*
69	* Karl Kleinpaste, Computer Consoles, Inc.
70	* Added precmd, periodic/tperiod, prompt changes,
71	* directory stack hack, and login watch.
72	* Sometime March 1983 - Feb 1984.
73	*
74	* Added scheduled commands, including the "sched" command,
75	* plus the call to sched_run near the precmd et al
76	* routines.
77	* Upgraded scheduled events for running events while
78	* sitting idle at command input.
79	*
80	* Paul Placeway, Ohio State
81	* added stuff for running with twenex/inputl 9 Oct 1984.
82	*
83	* ported to Apple Unix (TM) (OREO) 26 -- 29 Jun 1987
84	*/
85
86	jmp_buf_t reslab INIT_ZERO_STRUCT;
87
88	static const char tcshstr[] = "tcsh";
89	#ifdef WINNT
90	static const char tcshstr_nt[] = "tcsh.exe";
91	#endif /* WINNT */
92
93	signalfun_t parintr = 0; /* Parents interrupt catch */
94	signalfun_t parterm = 0; /* Parents terminate catch */
95
96	#ifdef TESLA
97	int do_logout = 0;
98	#endif /* TESLA */
99
100
101	bool use_fork = 0; /* use fork() instead of vfork()? */
102
103	/*
104	* Magic pointer values. Used to specify other invalid conditions aside
105	* from null.
106	*/
107	static Char INVCHAR;
108	Char *INVPTR = &INVCHAR;
109	Char **INVPPTR = &INVPTR;
110
111	static int nofile = 0;
112	static bool reenter = 0;
113	static bool nverbose = 0;
114	static bool nexececho = 0;
115	static bool quitit = 0;
116	static bool rdirs = 0;
117	bool fast = 0;
118	static bool batch = 0;
119	static bool mflag = 0;
120	static bool prompt = 1;
121	static int enterhist = 0;
122	bool tellwhat = 0;
123	time_t t_period;
124	Char *ffile = NULL;
125	bool dolzero = 0;
126	int insource = 0;
127	static time_t chktim; /* Time mail last checked */
128	char *progname;
129	int tcsh;
130	extern char **environ;
131
132	/*
133	* This preserves the input state of the shell. It is used by
134	* st_save and st_restore to manupulate shell state.
135	*/
136	struct saved_state {
137	int insource;
138	int SHIN;
139	int intty;
140	struct whyle *whyles;
141	Char *gointr;
142	Char *arginp;
143	Char *evalp;
144	Char **evalvec;
145	Char *alvecp;
146	Char **alvec;
147	int onelflg;
148	bool enterhist;
149	Char **argv;
150	Char HIST;
151	bool cantell;
152	struct Bin B;
153	/* These keep signal state and setjump state */
154	#ifdef BSDSIGS
155	sigmask_t mask;
156	#endif
157	jmp_buf_t oldexit;
158	int reenter;
159	};
160
161	static int srccat __P((Char , Char ));
162	static int srcfile __P((char , bool, int, Char *));
163	static sigret_t phup __P((int));
164	static void srcunit __P((int, bool, int, Char **));
165	static void mailchk __P((void));
166	#ifndef _PATH_DEFPATH
167	static Char **defaultpath __P((void));
168	#endif
169	static void record __P((void));
170	static void st_save __P((struct saved_state *, int, int,
171	Char , Char ));
172	static void st_restore __P((struct saved_state , Char *));
173
174	int main __P((int, char **));
175
176	int
177	main(argc, argv)
178	int argc;
179	char **argv;
180	{
181	register Char *cp;
182	#ifdef AUTOLOGOUT
183	register Char *cp2;
184	#endif
185	register char tcp, ttyn;
186	register int f;
187	register char **tempv;
188
189	#ifdef BSDSIGS
190	sigvec_t osv;
191	#endif /* BSDSIGS */
192
193	#ifdef WINNT
194	nt_init();
195	#endif /* WINNT */
196	#if defined(NLS_CATALOGS) && defined(LC_MESSAGES)
197	(void) setlocale(LC_MESSAGES, "");
198	#endif /* NLS_CATALOGS && LC_MESSAGES */
199
200	#ifdef NLS
201	# ifdef LC_CTYPE
202	(void) setlocale(LC_CTYPE, ""); /* for iscntrl */
203	# endif /* LC_CTYPE */
204	#endif /* NLS */
205
206	nlsinit();
207
208	#ifdef MALLOC_TRACE
209	mal_setstatsfile(fdopen(dup2(open("/tmp/tcsh.trace",
210	O_WRONLY\|O_CREAT, 0666), 25), "w"));
211	mal_trace(1);
212	#endif /* MALLOC_TRACE */
213
214	#if !(defined(BSDTIMES) \|\| defined(_SEQUENT_)) && defined(POSIX)
215	# ifdef _SC_CLK_TCK
216	clk_tck = (clock_t) sysconf(_SC_CLK_TCK);
217	# else /* ! _SC_CLK_TCK */
218	# ifdef CLK_TCK
219	clk_tck = CLK_TCK;
220	# else /* !CLK_TCK */
221	clk_tck = HZ;
222	# endif /* CLK_TCK */
223	# endif /* _SC_CLK_TCK */
224	#endif /* !BSDTIMES && POSIX */
225
226	settimes(); /* Immed. estab. timing base */
227	#ifdef TESLA
228	do_logout = 0;
229	#endif /* TESLA */
230
231	/*
232	* Make sure we have 0, 1, 2 open
233	* Otherwise `` jobs will not work... (From knaff@poly.polytechnique.fr)
234	*/
235	{
236	do
237	if ((f = open(_PATH_DEVNULL, O_RDONLY)) == -1 &&
238	(f = open("/", O_RDONLY)) == -1)
239	exit(1);
240	while (f < 3);
241	(void) close(f);
242	}
243
244	osinit(); /* Os dependent initialization */
245
246
247	{
248	char *t;
249
250	t = strrchr(argv[0], '/');
251	#ifdef WINNT
252	{
253	char *s = strrchr(argv[0], '\\');
254	if (s)
255	t = s;
256	}
257	#endif /* WINNT */
258	t = t ? t + 1 : argv[0];
259	if (*t == '-') t++;
260	progname = strsave((t && t) ? t : tcshstr); / never want a null */
261	tcsh = strcmp(progname, tcshstr) == 0;
262	}
263
264	/*
265	* Initialize non constant strings
266	*/
267	#ifdef _PATH_BSHELL
268	STR_BSHELL = SAVE(_PATH_BSHELL);
269	#endif
270	#ifdef _PATH_TCSHELL
271	STR_SHELLPATH = SAVE(_PATH_TCSHELL);
272	#else
273	# ifdef _PATH_CSHELL
274	STR_SHELLPATH = SAVE(_PATH_CSHELL);
275	# endif
276	#endif
277	STR_environ = blk2short(environ);
278	environ = short2blk(STR_environ); /* So that we can free it */
279	STR_WORD_CHARS = SAVE(WORD_CHARS);
280
281	HIST = '!';
282	HISTSUB = '^';
283	PRCH = '>';
284	PRCHROOT = '#';
285	word_chars = STR_WORD_CHARS;
286	bslash_quote = 0; /* PWP: do tcsh-style backslash quoting? */
287
288	/* Default history size to 100 */
289	set(STRhistory, SAVE("100"), VAR_READWRITE);
290
291	tempv = argv;
292	ffile = SAVE(tempv[0]);
293	dolzero = 0;
294	if (eq(ffile, STRaout)) /* A.out's are quittable */
295	quitit = 1;
296	uid = getuid();
297	gid = getgid();
298	euid = geteuid();
299	egid = getegid();
300	#ifdef OREO
301	/*
302	* We are a login shell if: 1. we were invoked as -<something> with
303	* optional arguments 2. or we were invoked only with the -l flag
304	*/
305	loginsh = (**tempv == '-') \|\| (argc == 2 &&
306	tempv[1][0] == '-' && tempv[1][1] == 'l' &&
307	tempv[1][2] == '\0');
308	#else
309	/*
310	* We are a login shell if: 1. we were invoked as -<something> and we had
311	* no arguments 2. or we were invoked only with the -l flag
312	*/
313	loginsh = (**tempv == '-' && argc == 1) \|\| (argc == 2 &&
314	tempv[1][0] == '-' && tempv[1][1] == 'l' &&
315	tempv[1][2] == '\0');
316	#endif
317
318	#ifdef _VMS_POSIX
319	/* No better way to find if we are a login shell */
320	if (!loginsh) {
321	loginsh = (argc == 1 && getppid() == 1);
322	*tempv = '-'; / Avoid giving VMS an acidic stomach */
323	}
324	#endif /* _VMS_POSIX */
325
326	if (loginsh && **tempv != '-') {
327	/*
328	* Mangle the argv space
329	*/
330	tempv[1][0] = '\0';
331	tempv[1][1] = '\0';
332	tempv[1] = NULL;
333	for (tcp = tempv; tcp++;)
334	continue;
335	for (tcp--; tcp >= *tempv; tcp--)
336	tcp[1] = tcp[0];
337	*++tcp = '-';
338	argc--;
339	}
340	if (loginsh) {
341	(void) time(&chktim);
342	set(STRloginsh, Strsave(STRNULL), VAR_READWRITE);
343	}
344
345	AsciiOnly = 1;
346	NoNLSRebind = getenv("NOREBIND") != NULL;
347	#ifdef NLS
348	# ifdef SETLOCALEBUG
349	dont_free = 1;
350	# endif /* SETLOCALEBUG */
351	(void) setlocale(LC_ALL, "");
352	# ifdef LC_COLLATE
353	(void) setlocale(LC_COLLATE, "");
354	# endif
355	# ifdef SETLOCALEBUG
356	dont_free = 0;
357	# endif /* SETLOCALEBUG */
358	# ifdef STRCOLLBUG
359	fix_strcoll_bug();
360	# endif /* STRCOLLBUG */
361
362	{
363	int k;
364
365	for (k = 0200; k <= 0377 && !Isprint(k); k++)
366	continue;
367	AsciiOnly = k > 0377;
368	}
369	#else
370	AsciiOnly = getenv("LANG") == NULL && getenv("LC_CTYPE") == NULL;
371	#endif /* NLS */
372	if (MapsAreInited && !NLSMapsAreInited)
373	ed_InitNLSMaps();
374	ResetArrowKeys();
375
376	/*
377	* Initialize for periodic command intervals. Also, initialize the dummy
378	* tty list for login-watch.
379	*/
380	(void) time(&t_period);
381	#ifndef HAVENOUTMP
382	initwatch();
383	#endif /* !HAVENOUTMP */
384
385	#if defined(alliant)
386	/*
387	* From: Jim Pace <jdp@research.att.com>
388	* tcsh does not work properly on the alliants through an rlogin session.
389	* The shell generally hangs. Also, reference to the controlling terminal
390	* does not work ( ie: echo foo > /dev/tty ).
391	*
392	* A security feature was added to rlogind affecting FX/80's Concentrix
393	* from revision 5.5.xx upwards (through 5.7 where this fix was implemented)
394	* This security change also affects the FX/2800 series.
395	* The security change to rlogind requires the process group of an rlogin
396	* session become disassociated with the tty in rlogind.
397	*
398	* The changes needed are:
399	* 1. set the process group
400	* 2. reenable the control terminal
401	*/
402	if (loginsh && isatty(SHIN)) {
403	ttyn = (char *) ttyname(SHIN);
404	(void) close(SHIN);
405	SHIN = open(ttyn, O_RDWR);
406	shpgrp = getpid();
407	(void) ioctl (SHIN, TIOCSPGRP, (ioctl_t) &shpgrp);
408	(void) setpgid(0, shpgrp);
409	}
410	#endif /* alliant */
411
412	/*
413	* Move the descriptors to safe places. The variable didfds is 0 while we
414	* have only FSH* to work with. When didfds is true, we have 0,1,2 and
415	* prefer to use these.
416	*/
417	initdesc();
418
419	/*
420	* Get and set the tty now
421	*/
422	if ((ttyn = ttyname(SHIN)) != NULL) {
423	/*
424	* Could use rindex to get rid of other possible path components, but
425	* hpux preserves the subdirectory /pty/ when storing the tty name in
426	* utmp, so we keep it too.
427	*/
428	if (strncmp(ttyn, "/dev/", 5) == 0)
429	set(STRtty, cp = SAVE(ttyn + 5), VAR_READWRITE);
430	else
431	set(STRtty, cp = SAVE(ttyn), VAR_READWRITE);
432	}
433	else
434	set(STRtty, cp = SAVE(""), VAR_READWRITE);
435	/*
436	* Initialize the shell variables. ARGV and PROMPT are initialized later.
437	* STATUS is also munged in several places. CHILD is munged when
438	* forking/waiting
439	*/
440
441	/*
442	* 7-10-87 Paul Placeway autologout should be set ONLY on login shells and
443	* on shells running as root. Out of these, autologout should NOT be set
444	* for any psudo-terminals (this catches most window systems) and not for
445	* any terminal running X windows.
446	*
447	* At Ohio State, we have had problems with a user having his X session
448	* drop out from under him (on a Sun) because the shell in his master
449	* xterm timed out and exited.
450	*
451	* Really, this should be done with a program external to the shell, that
452	* watches for no activity (and NO running programs, such as dump) on a
453	* terminal for a long peroid of time, and then SIGHUPS the shell on that
454	* terminal.
455	*
456	* bugfix by Rich Salz <rsalz@PINEAPPLE.BBN.COM>: For root rsh things
457	* allways first check to see if loginsh or really root, then do things
458	* with ttyname()
459	*
460	* Also by Jean-Francois Lamy <lamy%ai.toronto.edu@RELAY.CS.NET>: check the
461	* value of cp before using it! ("root can rsh too")
462	*
463	* PWP: keep the nested ifs; the order of the tests matters and a good
464	* (smart) C compiler might re-arange things wrong.
465	*/
466	#ifdef AUTOLOGOUT
467	# ifdef convex
468	if (uid == 0) {
469	/* root always has a 15 minute autologout */
470	set(STRautologout, Strsave(STRrootdefautologout));
471	}
472	else
473	if (loginsh)
474	/* users get autologout set to 0 */
475	set(STRautologout, Strsave(STR0));
476	# else /* convex */
477	if (loginsh \|\| (uid == 0)) {
478	if (*cp) {
479	/* only for login shells or root and we must have a tty */
480	if ((cp2 = Strrchr(cp, (Char) '/')) != NULL) {
481	cp = cp2 + 1;
482	}
483	else
484	cp2 = cp;
485	if (!(((Strncmp(cp2, STRtty, 3) == 0) && Isalpha(cp2[3])) \|\|
486	((Strncmp(cp, STRpts, 3) == 0) && cp[3] == '/'))) {
487	if (getenv("DISPLAY") == NULL) {
488	/* NOT on X window shells */
489	set(STRautologout, Strsave(STRdefautologout),
490	VAR_READWRITE);
491	}
492	}
493	}
494	}
495	# endif /* convex */
496	#endif /* AUTOLOGOUT */
497
498	(void) sigset(SIGALRM, alrmcatch);
499
500	set(STRstatus, Strsave(STR0), VAR_READWRITE);
501
502	/*
503	* get and set machine specific envirnment variables
504	*/
505	getmachine();
506
507	fix_version(); /* publish the shell version */
508
509	/*
510	* Publish the selected echo style
511	*/
512	#if ECHO_STYLE == NONE_ECHO
513	set(STRecho_style, Strsave(STRnone), VAR_READWRITE);
514	#endif /* ECHO_STYLE == NONE_ECHO */
515	#if ECHO_STYLE == BSD_ECHO
516	set(STRecho_style, Strsave(STRbsd), VAR_READWRITE);
517	#endif /* ECHO_STYLE == BSD_ECHO */
518	#if ECHO_STYLE == SYSV_ECHO
519	set(STRecho_style, Strsave(STRsysv), VAR_READWRITE);
520	#endif /* ECHO_STYLE == SYSV_ECHO */
521	#if ECHO_STYLE == BOTH_ECHO
522	set(STRecho_style, Strsave(STRboth), VAR_READWRITE);
523	#endif /* ECHO_STYLE == BOTH_ECHO */
524
525	/*
526	* increment the shell level.
527	*/
528	shlvl(1);
529
530	if ((tcp = getenv("HOME")) != NULL)
531	cp = quote(SAVE(tcp));
532	else
533	cp = NULL;
534	if (cp == NULL)
535	fast = 1; /* No home -> can't read scripts */
536	else
537	set(STRhome, cp, VAR_READWRITE);
538	dinit(cp); /* dinit thinks that HOME == cwd in a login
539	* shell */
540	/*
541	* Grab other useful things from the environment. Should we grab
542	* everything??
543	*/
544	{
545	char cln, cus, *cgr;
546	Char buff[BUFSIZE];
547	struct passwd *pw;
548	struct group *gr;
549
550
551	#ifdef apollo
552	int oid = getoid();
553
554	Itoa(oid, buff);
555	set(STRoid, Strsave(buff), VAR_READWRITE);
556	#endif /* apollo */
557
558	Itoa(uid, buff);
559	set(STRuid, Strsave(buff), VAR_READWRITE);
560
561	Itoa(gid, buff);
562	set(STRgid, Strsave(buff), VAR_READWRITE);
563
564	cln = getenv("LOGNAME");
565	cus = getenv("USER");
566	if (cus != NULL)
567	set(STRuser, quote(SAVE(cus)), VAR_READWRITE);
568	else if (cln != NULL)
569	set(STRuser, quote(SAVE(cln)), VAR_READWRITE);
570	else if ((pw = getpwuid(uid)) == NULL)
571	set(STRuser, SAVE("unknown"), VAR_READWRITE);
572	else
573	set(STRuser, SAVE(pw->pw_name), VAR_READWRITE);
574	if (cln == NULL)
575	tsetenv(STRLOGNAME, varval(STRuser));
576	if (cus == NULL)
577	tsetenv(STRKUSER, varval(STRuser));
578
579	cgr = getenv("GROUP");
580	if (cgr != NULL)
581	set(STRgroup, quote(SAVE(cgr)), VAR_READWRITE);
582	else if ((gr = getgrgid(gid)) == NULL)
583	set(STRgroup, SAVE("unknown"), VAR_READWRITE);
584	else
585	set(STRgroup, SAVE(gr->gr_name), VAR_READWRITE);
586	if (cgr == NULL)
587	tsetenv(STRKGROUP, varval(STRgroup));
588	}
589
590	/*
591	* HOST may be wrong, since rexd transports the entire environment on sun
592	* 3.x Just set it again
593	*/
594	{
595	char cbuff[MAXHOSTNAMELEN];
596
597	if (gethostname(cbuff, sizeof(cbuff)) >= 0) {
598	cbuff[sizeof(cbuff) - 1] = '\0'; /* just in case */
599	tsetenv(STRHOST, str2short(cbuff));
600	}
601	else
602	tsetenv(STRHOST, str2short("unknown"));
603	}
604
605
606	#ifdef REMOTEHOST
607	/*
608	* Try to determine the remote host we were logged in from.
609	*/
610	remotehost();
611	#endif /* REMOTEHOST */
612
613	#ifdef apollo
614	if ((tcp = getenv("SYSTYPE")) == NULL)
615	tcp = "bsd4.3";
616	tsetenv(STRSYSTYPE, quote(str2short(tcp)));
617	#endif /* apollo */
618
619	/*
620	* set editing on by default, unless running under Emacs as an inferior
621	* shell.
622	* We try to do this intelligently. If $TERM is available, then it
623	* should determine if we should edit or not. $TERM is preserved
624	* across rlogin sessions, so we will not get confused if we rlogin
625	* under an emacs shell. Another advantage is that if we run an
626	* xterm under an emacs shell, then the $TERM will be set to
627	* xterm, so we are going to want to edit. Unfortunately emacs
628	* does not restore all the tty modes, so xterm is not very well
629	* set up. But this is not the shell's fault.
630	* Also don't edit if $TERM == wm, for when we're running under an ATK app.
631	* Finally, emacs compiled under terminfo, sets the terminal to dumb,
632	* so disable editing for that too.
633	*
634	* Unfortunately, in some cases the initial $TERM setting is "unknown",
635	* "dumb", or "network" which is then changed in the user's startup files.
636	* We fix this by setting noediting here if $TERM is unknown/dumb and
637	* if noediting is set, we switch on editing if $TERM is changed.
638	*/
639	if ((tcp = getenv("TERM")) != NULL) {
640	set(STRterm, quote(SAVE(tcp)), VAR_READWRITE);
641	noediting = strcmp(tcp, "unknown") == 0 \|\| strcmp(tcp, "dumb") == 0 \|\|
642	strcmp(tcp, "network") == 0;
643	editing = strcmp(tcp, "emacs") != 0 && strcmp(tcp, "wm") != 0 &&
644	!noediting;
645	}
646	else {
647	noediting = 0;
648	editing = ((tcp = getenv("EMACS")) == NULL \|\| strcmp(tcp, "t") != 0);
649	}
650
651	/*
652	* The 'edit' variable is either set or unset. It doesn't
653	* need a value. Making it 'emacs' might be confusing.
654	*/
655	if (editing)
656	set(STRedit, Strsave(STRNULL), VAR_READWRITE);
657
658
659	/*
660	* still more mutability: make the complete routine automatically add the
661	* suffix of file names...
662	*/
663	set(STRaddsuffix, Strsave(STRNULL), VAR_READWRITE);
664
665	/*
666	* Re-initialize path if set in environment
667	*/
668	if ((tcp = getenv("PATH")) == NULL)
669	#ifdef _PATH_DEFPATH
670	importpath(str2short(_PATH_DEFPATH));
671	#else /* !_PATH_DEFPATH */
672	setq(STRpath, defaultpath(), &shvhed, VAR_READWRITE);
673	#endif /* _PATH_DEFPATH */
674	else
675	/* Importpath() allocates memory for the path, and the
676	* returned pointer from SAVE() was discarded, so
677	* this was a memory leak.. (sg)
678	*
679	* importpath(SAVE(tcp));
680	*/
681	importpath(str2short(tcp));
682
683
684	{
685	/* If the SHELL environment variable ends with "tcsh", set
686	* STRshell to the same path. This is to facilitate using
687	* the executable in environments where the compiled-in
688	* default isn't appropriate (sg).
689	*/
690
691	int sh_len = 0;
692
693	if ((tcp = getenv("SHELL")) != NULL) {
694	sh_len = strlen(tcp);
695	if ((sh_len >= 5 && strcmp(tcp + (sh_len - 5), "/tcsh") == 0) \|\|
696	(sh_len >= 4 && strcmp(tcp + (sh_len - 4), "/csh") == 0))
697	set(STRshell, quote(SAVE(tcp)), VAR_READWRITE);
698	else
699	sh_len = 0;
700	}
701	if (sh_len == 0)
702	set(STRshell, Strsave(STR_SHELLPATH), VAR_READWRITE);
703	}
704
705	#ifdef COLOR_LS_F
706	if ((tcp = getenv("LS_COLORS")) != NULL)
707	parseLS_COLORS(str2short(tcp));
708	#endif /* COLOR_LS_F */
709
710	doldol = putn((int) getpid()); /* For $$ */
711	#ifdef WINNT
712	{
713	char *strtmp1, strtmp2[MAXPATHLEN];
714	if ((strtmp1 = getenv("TMP")) != NULL)
715	wsprintf(strtmp2, "%s/%s", strtmp1, "sh");
716	shtemp = Strspl(SAVE(strtmp2), doldol); /* For << */
717	}
718	#else /* !WINNT */
719	shtemp = Strspl(STRtmpsh, doldol); /* For << */
720	#endif /* WINNT */
721
722	/*
723	* Record the interrupt states from the parent process. If the parent is
724	* non-interruptible our hand must be forced or we (and our children) won't
725	* be either. Our children inherit termination from our parent. We catch it
726	* only if we are the login shell.
727	*/
728	#ifdef BSDSIGS
729	/*
730	* PURIFY-2 claims that osv does not get
731	* initialized after the sigvec call
732	*/
733	setzero((char*) &osv, sizeof(osv));
734	/* parents interruptibility */
735	(void) mysigvec(SIGINT, NULL, &osv);
736	parintr = (signalfun_t) osv.sv_handler;
737	(void) mysigvec(SIGTERM, NULL, &osv);
738	parterm = (signalfun_t) osv.sv_handler;
739	#else /* BSDSIGS */
740	parintr = signal(SIGINT, SIG_IGN); /* parents interruptibility */
741	(void) sigset(SIGINT, parintr); /* ... restore */
742
743	# ifdef COHERENT
744	if (loginsh) /* it seems that SIGTERM is always set to SIG_IGN by */
745	/* init/getty so it should be set to SIG_DFL - there may be */
746	/* a better fix for this. */
747	parterm = SIG_DFL;
748	else
749	# else /* !COHERENT */
750	parterm = signal(SIGTERM, SIG_IGN); /* parents terminability */
751	# endif /* COHERENT */
752	(void) sigset(SIGTERM, parterm); /* ... restore */
753
754	#endif /* BSDSIGS */
755
756
757	#ifdef TCF
758	/* Enable process migration on ourselves and our progeny */
759	(void) signal(SIGMIGRATE, SIG_DFL);
760	#endif /* TCF */
761
762	/*
763	* Process the arguments.
764	*
765	* Note that processing of -v/-x is actually delayed till after script
766	* processing.
767	*
768	* We set the first character of our name to be '-' if we are a shell
769	* running interruptible commands. Many programs which examine ps'es
770	* use this to filter such shells out.
771	*/
772	argc--, tempv++;
773	while (argc > 0 && (tcp = tempv[0])[0] == '-' &&
774	*++tcp != '\0' && !batch) {
775	do
776	switch (*tcp++) {
777
778	case 0: /* - Interruptible, no prompt */
779	prompt = 0;
780	setintr = 1;
781	nofile = 1;
782	break;
783
784	case 'b': /* -b Next arg is input file */
785	batch = 1;
786	break;
787
788	case 'c': /* -c Command input from arg */
789	if (argc == 1)
790	xexit(0);
791	argc--, tempv++;
792	#ifdef M_XENIX
793	/* Xenix Vi bug:
794	it relies on a 7 bit environment (/bin/sh), so it
795	pass ascii arguments with the 8th bit set */
796	if (!strcmp(argv[0], "sh"))
797	{
798	char *p;
799
800	for (p = tempv[0]; *p; ++p)
801	*p &= ASCII;
802	}
803	#endif
804	arginp = SAVE(tempv[0]);
805
806	/*
807	* we put the command into a variable
808	*/
809	if (arginp != NULL)
810	set(STRcommand, quote(Strsave(arginp)), VAR_READWRITE);
811
812	/*
813	* * Give an error on -c arguments that end in * backslash to
814	* ensure that you don't make * nonportable csh scripts.
815	*/
816	{
817	register int count;
818
819	cp = arginp + Strlen(arginp);
820	count = 0;
821	while (cp > arginp && *--cp == '\\')
822	++count;
823	if ((count & 1) != 0) {
824	exiterr = 1;
825	stderror(ERR_ARGC);
826	}
827	}
828	prompt = 0;
829	nofile = 1;
830	break;
831	case 'd': /* -d Load directory stack from file */
832	rdirs = 1;
833	break;
834
835	#ifdef apollo
836	case 'D': /* -D Define environment variable */
837	{
838	register Char *dp;
839
840	cp = str2short(tcp);
841	if (dp = Strchr(cp, '=')) {
842	*dp++ = '\0';
843	tsetenv(cp, dp);
844	}
845	else
846	tsetenv(cp, STRNULL);
847	}
848	tcp = '\0'; / done with this argument */
849	break;
850	#endif /* apollo */
851
852	case 'e': /* -e Exit on any error */
853	exiterr = 1;
854	break;
855
856	case 'f': /* -f Fast start */
857	fast = 1;
858	break;
859
860	case 'i': /* -i Interactive, even if !intty */
861	intact = 1;
862	nofile = 1;
863	break;
864
865	case 'm': /* -m read .cshrc (from su) */
866	mflag = 1;
867	break;
868
869	case 'n': /* -n Don't execute */
870	noexec = 1;
871	break;
872
873	case 'q': /* -q (Undoc'd) ... die on quit */
874	quitit = 1;
875	break;
876
877	case 's': /* -s Read from std input */
878	nofile = 1;
879	break;
880
881	case 't': /* -t Read one line from input */
882	onelflg = 2;
883	prompt = 0;
884	nofile = 1;
885	break;
886
887	case 'v': /* -v Echo hist expanded input */
888	nverbose = 1; /* ... later */
889	break;
890
891	case 'x': /* -x Echo just before execution */
892	nexececho = 1; /* ... later */
893	break;
894
895	case 'V': /* -V Echo hist expanded input */
896	setNS(STRverbose); /* NOW! */
897	break;
898
899	case 'X': /* -X Echo just before execution */
900	setNS(STRecho); /* NOW! */
901	break;
902
903	case 'F': /* Undocumented flag */
904	/*
905	* This will cause children to be created using fork instead of
906	* vfork.
907	*/
908	use_fork = 1;
909	break;
910
911	case ' ':
912	case '\t':
913	/*
914	* for O/S's that don't do the argument parsing right in
915	* "#!/foo -f " scripts
916	*/
917	break;
918
919	default: /* Unknown command option */
920	exiterr = 1;
921	stderror(ERR_TCSHUSAGE, tcp-1, progname);
922	break;
923
924	} while (*tcp);
925	tempv++, argc--;
926	}
927
928	if (quitit) /* With all due haste, for debugging */
929	(void) signal(SIGQUIT, SIG_DFL);
930
931	/*
932	* Unless prevented by -, -c, -i, -s, or -t, if there are remaining
933	* arguments the first of them is the name of a shell file from which to
934	* read commands.
935	*/
936	if (nofile == 0 && argc > 0) {
937	nofile = open(tempv[0], O_RDONLY);
938	if (nofile < 0) {
939	child = 1; /* So this ... */
940	/* ... doesn't return */
941	stderror(ERR_SYSTEM, tempv[0], strerror(errno));
942	}
943	if (ffile != NULL)
944	xfree((ptr_t) ffile);
945	dolzero = 1;
946	ffile = SAVE(tempv[0]);
947	/*
948	* Replace FSHIN. Handle /dev/std{in,out,err} specially
949	* since once they are closed we cannot open them again.
950	* In that case we use our own saved descriptors
951	*/
952	if ((SHIN = dmove(nofile, FSHIN)) < 0)
953	switch(nofile) {
954	case 0:
955	SHIN = FSHIN;
956	break;
957	case 1:
958	SHIN = FSHOUT;
959	break;
960	case 2:
961	SHIN = FSHDIAG;
962	break;
963	default:
964	stderror(ERR_SYSTEM, tempv[0], strerror(errno));
965	break;
966	}
967	(void) close_on_exec(SHIN, 1);
968	prompt = 0;
969	/* argc not used any more */ tempv++;
970	}
971
972
973	/*
974	* Consider input a tty if it really is or we are interactive. but not for
975	* editing (christos)
976	*/
977	if (!(intty = isatty(SHIN))) {
978	if (adrof(STRedit))
979	unsetv(STRedit);
980	editing = 0;
981	}
982	intty \|= intact;
983	#ifndef convex
984	if (intty \|\| (intact && isatty(SHOUT))) {
985	if (!batch && (uid != euid \|\| gid != egid)) {
986	errno = EACCES;
987	child = 1; /* So this ... */
988	/* ... doesn't return */
989	stderror(ERR_SYSTEM, progname, strerror(errno));
990	}
991	}
992	#endif /* convex */
993	isoutatty = isatty(SHOUT);
994	isdiagatty = isatty(SHDIAG);
995	/*
996	* Decide whether we should play with signals or not. If we are explicitly
997	* told (via -i, or -) or we are a login shell (arg0 starts with -) or the
998	* input and output are both the ttys("csh", or "csh</dev/ttyx>/dev/ttyx")
999	* Note that in only the login shell is it likely that parent may have set
1000	* signals to be ignored
1001	*/
1002	if (loginsh \|\| intact \|\| (intty && isatty(SHOUT)))
1003	setintr = 1;
1004	settell();
1005	/*
1006	* Save the remaining arguments in argv.
1007	*/
1008	setq(STRargv, blk2short(tempv), &shvhed, VAR_READWRITE);
1009
1010	/*
1011	* Set up the prompt.
1012	*/
1013	if (prompt) {
1014	if (tcsh)
1015	set(STRprompt, Strsave(STRdeftcshprompt), VAR_READWRITE);
1016	else
1017	set(STRprompt, Strsave(STRdefcshprompt), VAR_READWRITE);
1018	/* that's a meta-questionmark */
1019	set(STRprompt2, Strsave(STRmquestion), VAR_READWRITE);
1020	set(STRprompt3, Strsave(STRKCORRECT), VAR_READWRITE);
1021	}
1022
1023	/*
1024	* If we are an interactive shell, then start fiddling with the signals;
1025	* this is a tricky game.
1026	*/
1027	shpgrp = mygetpgrp();
1028	opgrp = tpgrp = -1;
1029	if (setintr) {
1030	signalfun_t osig;
1031	**argv = '-';
1032	if (!quitit) /* Wary! */
1033	(void) signal(SIGQUIT, SIG_IGN);
1034	(void) sigset(SIGINT, pintr);
1035	(void) sighold(SIGINT);
1036	(void) signal(SIGTERM, SIG_IGN);
1037
1038	/*
1039	* No reason I can see not to save history on all these events..
1040	* Most usual occurrence is in a window system, where we're not a login
1041	* shell, but might as well be... (sg)
1042	* But there might be races when lots of shells exit together...
1043	* [this is also incompatible].
1044	* We have to be mre careful here. If the parent wants to
1045	* ignore the signals then we leave them untouched...
1046	* We also only setup the handlers for shells that are trully
1047	* interactive.
1048	*/
1049	osig = signal(SIGHUP, phup); /* exit processing on HUP */
1050	if (!loginsh && osig == SIG_IGN)
1051	(void) signal(SIGHUP, osig);
1052	#ifdef SIGXCPU
1053	osig = signal(SIGXCPU, phup); /* exit processing on XCPU */
1054	if (!loginsh && osig == SIG_IGN)
1055	(void) signal(SIGXCPU, osig);
1056	#endif
1057	#ifdef SIGXFSZ
1058	osig = signal(SIGXFSZ, phup); /* exit processing on XFSZ */
1059	if (!loginsh && osig == SIG_IGN)
1060	(void) signal(SIGXFSZ, osig);
1061	#endif
1062
1063	if (quitit == 0 && arginp == 0) {
1064	#ifdef SIGTSTP
1065	(void) signal(SIGTSTP, SIG_IGN);
1066	#endif
1067	#ifdef SIGTTIN
1068	(void) signal(SIGTTIN, SIG_IGN);
1069	#endif
1070	#ifdef SIGTTOU
1071	(void) signal(SIGTTOU, SIG_IGN);
1072	#endif
1073	/*
1074	* Wait till in foreground, in case someone stupidly runs csh &
1075	* dont want to try to grab away the tty.
1076	*/
1077	if (isatty(FSHDIAG))
1078	f = FSHDIAG;
1079	else if (isatty(FSHOUT))
1080	f = FSHOUT;
1081	else if (isatty(OLDSTD))
1082	f = OLDSTD;
1083	else
1084	f = -1;
1085
1086	#ifdef NeXT
1087	/* NeXT 2.0 /usr/etc/rlogind, does not set our process group! */
1088	if (shpgrp == 0) {
1089	shpgrp = getpid();
1090	(void) setpgid(0, shpgrp);
1091	(void) tcsetpgrp(f, shpgrp);
1092	}
1093	#endif /* NeXT */
1094	#ifdef BSDJOBS /* if we have tty job control */
1095	retry:
1096	if ((tpgrp = tcgetpgrp(f)) != -1) {
1097	if (tpgrp != shpgrp) {
1098	signalfun_t old = signal(SIGTTIN, SIG_DFL);
1099	(void) kill(0, SIGTTIN);
1100	(void) signal(SIGTTIN, old);
1101	goto retry;
1102	}
1103	/*
1104	* Thanks to Matt Day for the POSIX references, and to
1105	* Paul Close for the SGI clarification.
1106	*/
1107	if (setdisc(f) != -1) {
1108	opgrp = shpgrp;
1109	shpgrp = getpid();
1110	tpgrp = shpgrp;
1111	if (tcsetpgrp(f, shpgrp) == -1) {
1112	/*
1113	* On hpux 7.03 this fails with EPERM. This happens on
1114	* the 800 when opgrp != shpgrp at this point. (we were
1115	* forked from a non job control shell)
1116	* POSIX 7.2.4, says we failed because the process
1117	* group specified did not belong to a process
1118	* in the same session with the tty. So we set our
1119	* process group and try again.
1120	*/
1121	if (setpgid(0, shpgrp) == -1) {
1122	xprintf("setpgid:");
1123	goto notty;
1124	}
1125	if (tcsetpgrp(f, shpgrp) == -1) {
1126	xprintf("tcsetpgrp:");
1127	goto notty;
1128	}
1129	}
1130	/*
1131	* We check the process group now. If it is the same, then
1132	* we don't need to set it again. On hpux 7.0 on the 300's
1133	* if we set it again it fails with EPERM. This is the
1134	* correct behavior according to POSIX 4.3.3 if the process
1135	* was a session leader .
1136	*/
1137	else if (shpgrp != mygetpgrp()) {
1138	if(setpgid(0, shpgrp) == -1) {
1139	xprintf("setpgid:");
1140	goto notty;
1141	}
1142	}
1143	#ifdef IRIS4D
1144	/*
1145	* But on irix 3.3 we need to set it again, even if it is
1146	* the same. We do that to tell the system that we
1147	* need BSD process group compatibility.
1148	*/
1149	else
1150	(void) setpgid(0, shpgrp);
1151	#endif
1152	(void) close_on_exec(dcopy(f, FSHTTY), 1);
1153	}
1154	else
1155	tpgrp = -1;
1156	}
1157	if (tpgrp == -1) {
1158	notty:
1159	xprintf(CGETS(11, 1, "Warning: no access to tty (%s).\n"),
1160	strerror(errno));
1161	xprintf(CGETS(11, 2, "Thus no job control in this shell.\n"));
1162	/*
1163	* Fix from:Sakari Jalovaara <sja@sirius.hut.fi> if we don't
1164	* have access to tty, disable editing too
1165	*/
1166	if (adrof(STRedit))
1167	unsetv(STRedit);
1168	editing = 0;
1169	}
1170	#else /* BSDJOBS / / don't have job control, so frotz it */
1171	tpgrp = -1;
1172	#endif /* BSDJOBS */
1173	}
1174	}
1175	if ((setintr == 0) && (parintr == SIG_DFL))
1176	setintr = 1;
1177
1178	/*
1179	* SVR4 doesn't send a SIGCHLD when a child is stopped or continued if the
1180	* handler is installed with signal(2) or sigset(2). sigaction(2) must
1181	* be used instead.
1182	*
1183	* David Dawes (dawes@physics.su.oz.au) Sept 1991
1184	*/
1185
1186	#if SYSVREL > 3
1187	{
1188	struct sigaction act;
1189	act.sa_handler=pchild;
1190	(void) sigemptyset(&(act.sa_mask)); /* Don't block any extra sigs
1191	* when the handler is called
1192	*/
1193	act.sa_flags=0; /* want behaviour of sigset() without
1194	* SA_NOCLDSTOP
1195	*/
1196
1197	if ((sigaction(SIGCHLD,&act,(struct sigaction *)NULL)) == -1)
1198	stderror(ERR_SYSTEM, "sigaction", strerror(errno));
1199	}
1200	#else /* SYSVREL <= 3 */
1201	(void) sigset(SIGCHLD, pchild); /* while signals not ready */
1202	#endif /* SYSVREL <= 3 */
1203
1204
1205	if (intty && !arginp)
1206	(void) ed_Setup(editing);/* Get the tty state, and set defaults */
1207	/* Only alter the tty state if editing */
1208
1209	/*
1210	* Set an exit here in case of an interrupt or error reading the shell
1211	* start-up scripts.
1212	*/
1213	reenter = setexit(); /* PWP */
1214	haderr = 0; /* In case second time through */
1215	if (!fast && reenter == 0) {
1216	/* Will have varval(STRhome) here because set fast if don't */
1217	{
1218	int osetintr = setintr;
1219	signalfun_t oparintr = parintr;
1220
1221	#ifdef BSDSIGS
1222	sigmask_t omask = sigblock(sigmask(SIGINT));
1223	#else
1224	(void) sighold(SIGINT);
1225	#endif
1226	setintr = 0;
1227	parintr = SIG_IGN; /* onintr in /etc/ files has no effect */
1228	#ifdef LOGINFIRST
1229	#ifdef _PATH_DOTLOGIN
1230	if (loginsh)
1231	(void) srcfile(_PATH_DOTLOGIN, 0, 0, NULL);
1232	#endif
1233	#endif
1234
1235	#ifdef _PATH_DOTCSHRC
1236	(void) srcfile(_PATH_DOTCSHRC, 0, 0, NULL);
1237	#endif
1238	if (!arginp && !onelflg && !havhash)
1239	dohash(NULL,NULL);
1240	#ifndef LOGINFIRST
1241	#ifdef _PATH_DOTLOGIN
1242	if (loginsh)
1243	(void) srcfile(_PATH_DOTLOGIN, 0, 0, NULL);
1244	#endif
1245	#endif
1246	#ifdef BSDSIGS
1247	(void) sigsetmask(omask);
1248	#else
1249	(void) sigrelse(SIGINT);
1250	#endif
1251	setintr = osetintr;
1252	parintr = oparintr;
1253	}
1254	#ifdef LOGINFIRST
1255	if (loginsh)
1256	(void) srccat(varval(STRhome), STRsldotlogin);
1257	#endif
1258	(void) srccat(varval(STRhome), STRsldottcshrc);
1259	(void) srccat(varval(STRhome), STRsldotcshrc);
1260
1261	if (!fast && !arginp && !onelflg && !havhash)
1262	dohash(NULL,NULL);
1263
1264	/*
1265	* Source history before .login so that it is available in .login
1266	*/
1267	loadhist(NULL, 0);
1268	#ifndef LOGINFIRST
1269	if (loginsh)
1270	(void) srccat(varval(STRhome), STRsldotlogin);
1271	#endif
1272	if (!fast && (loginsh \|\| rdirs))
1273	loaddirs(NULL);
1274	}
1275	/* Initing AFTER .cshrc is the Right Way */
1276	if (intty && !arginp) { /* PWP setup stuff */
1277	ed_Init(); /* init the new line editor */
1278	#ifdef SIG_WINDOW
1279	check_window_size(1); /* mung environment */
1280	#endif /* SIG_WINDOW */
1281	}
1282
1283	/*
1284	* dspkanji/dspmbyte autosetting
1285	*/
1286	/* PATCH IDEA FROM Issei.Suzuki VERY THANKS */
1287	#if defined(DSPMBYTE)
1288	if ((tcp = getenv("LANG")) != NULL && !adrof(CHECK_MBYTEVAR)) {
1289	autoset_dspmbyte(str2short(tcp));
1290	}
1291	#if defined(WINNT)
1292	else if (!adrof(CHECK_MBYTEVAR))
1293	nt_autoset_dspmbyte();
1294	#endif /* WINNT */
1295	#endif
1296
1297	/*
1298	* Now are ready for the -v and -x flags
1299	*/
1300	if (nverbose)
1301	setNS(STRverbose);
1302	if (nexececho)
1303	setNS(STRecho);
1304
1305	/*
1306	* All the rest of the world is inside this call. The argument to process
1307	* indicates whether it should catch "error unwinds". Thus if we are a
1308	* interactive shell our call here will never return by being blown past on
1309	* an error.
1310	*/
1311	process(setintr);
1312
1313	/*
1314	* Mop-up.
1315	*/
1316	if (intty) {
1317	if (loginsh) {
1318	xprintf("logout\n");
1319	(void) close(SHIN);
1320	child = 1;
1321	#ifdef TESLA
1322	do_logout = 1;
1323	#endif /* TESLA */
1324	goodbye(NULL, NULL);
1325	}
1326	else {
1327	xprintf("exit\n");
1328	}
1329	}
1330	record();
1331	exitstat();
1332	return (0);
1333	}
1334
1335	void
1336	untty()
1337	{
1338	#ifdef BSDJOBS
1339	if (tpgrp > 0 && opgrp != shpgrp) {
1340	(void) setpgid(0, opgrp);
1341	(void) tcsetpgrp(FSHTTY, opgrp);
1342	(void) resetdisc(FSHTTY);
1343	}
1344	#endif /* BSDJOBS */
1345	}
1346
1347	void
1348	importpath(cp)
1349	Char *cp;
1350	{
1351	register int i = 0;
1352	register Char *dp;
1353	register Char **pv;
1354	int c;
1355
1356	for (dp = cp; *dp; dp++)
1357	if (*dp == PATHSEP)
1358	i++;
1359	/*
1360	* i+2 where i is the number of colons in the path. There are i+1
1361	* directories in the path plus we need room for a zero terminator.
1362	*/
1363	pv = (Char *) xcalloc((size_t) (i + 2), sizeof(Char ));
1364	dp = cp;
1365	i = 0;
1366	if (*dp)
1367	for (;;) {
1368	if ((c = *dp) == PATHSEP \|\| c == 0) {
1369	*dp = 0;
1370	pv[i++] = Strsave(*cp ? cp : STRdot);
1371	if (c) {
1372	cp = dp + 1;
1373	*dp = PATHSEP;
1374	}
1375	else
1376	break;
1377	}
1378	#ifdef WINNT
1379	else if (*dp == '\\')
1380	*dp = '/';
1381	#endif /* WINNT */
1382	dp++;
1383	}
1384	pv[i] = 0;
1385	setq(STRpath, pv, &shvhed, VAR_READWRITE);
1386	}
1387
1388	/*
1389	* Source to the file which is the catenation of the argument names.
1390	*/
1391	static int
1392	srccat(cp, dp)
1393	Char cp, dp;
1394	{
1395	if (cp[0] == '/' && cp[1] == '\0')
1396	return srcfile(short2str(dp), (mflag ? 0 : 1), 0, NULL);
1397	else {
1398	register Char *ep;
1399	char *ptr;
1400	int rv;
1401
1402	#ifdef WINNT
1403	ep = cp;
1404	while(*ep)
1405	ep++;
1406	if (ep[-1] == '/' && dp[0] == '/') /* silly win95 */
1407	dp++;
1408	#endif /* WINNT */
1409
1410	ep = Strspl(cp, dp);
1411	ptr = short2str(ep);
1412
1413	rv = srcfile(ptr, (mflag ? 0 : 1), 0, NULL);
1414	xfree((ptr_t) ep);
1415	return rv;
1416	}
1417	}
1418
1419	/*
1420	* Source to a file putting the file descriptor in a safe place (> 2).
1421	*/
1422	static int
1423	srcfile(f, onlyown, flag, av)
1424	char *f;
1425	bool onlyown;
1426	int flag;
1427	Char **av;
1428	{
1429	register int unit;
1430
1431	if ((unit = open(f, O_RDONLY)) == -1)
1432	return 0;
1433	unit = dmove(unit, -1);
1434
1435	(void) close_on_exec(unit, 1);
1436	srcunit(unit, onlyown, flag, av);
1437	return 1;
1438	}
1439
1440
1441	/*
1442	* Save the shell state, and establish new argument vector, and new input
1443	* fd.
1444	*/
1445	static void
1446	st_save(st, unit, hflg, al, av)
1447	struct saved_state *st;
1448	int unit, hflg;
1449	Char al, av;
1450	{
1451	st->insource = insource;
1452	st->SHIN = SHIN;
1453	st->intty = intty;
1454	st->whyles = whyles;
1455	st->gointr = gointr;
1456	st->arginp = arginp;
1457	st->evalp = evalp;
1458	st->evalvec = evalvec;
1459	st->alvecp = alvecp;
1460	st->alvec = alvec;
1461	st->onelflg = onelflg;
1462	st->enterhist = enterhist;
1463	if (hflg)
1464	st->HIST = HIST;
1465	else
1466	st->HIST = '\0';
1467	st->cantell = cantell;
1468	cpybin(st->B, B);
1469
1470	/*
1471	* we can now pass arguments to source.
1472	* For compatibility we do that only if arguments were really
1473	* passed, otherwise we keep the old, global $argv like before.
1474	*/
1475	if (av != NULL && *av != NULL) {
1476	struct varent *vp;
1477	if ((vp = adrof(STRargv)) != NULL)
1478	st->argv = saveblk(vp->vec);
1479	else
1480	st->argv = NULL;
1481	setq(STRargv, saveblk(av), &shvhed, VAR_READWRITE);
1482	}
1483	else
1484	st->argv = NULL;
1485
1486	SHIN = unit; /* Do this first */
1487
1488	/* Establish new input arena */
1489	{
1490	fbuf = NULL;
1491	fseekp = feobp = fblocks = 0;
1492	settell();
1493	}
1494
1495	arginp = 0;
1496	onelflg = 0;
1497	intty = isatty(SHIN);
1498	whyles = 0;
1499	gointr = 0;
1500	evalvec = 0;
1501	evalp = 0;
1502	alvec = al;
1503	alvecp = 0;
1504	enterhist = hflg;
1505	if (enterhist)
1506	HIST = '\0';
1507	insource = 1;
1508	}
1509
1510
1511	/*
1512	* Restore the shell to a saved state
1513	*/
1514	static void
1515	st_restore(st, av)
1516	struct saved_state *st;
1517	Char **av;
1518	{
1519	if (st->SHIN == -1)
1520	return;
1521
1522	/* Reset input arena */
1523	{
1524	register int i;
1525	register Char** nfbuf = fbuf;
1526	register int nfblocks = fblocks;
1527
1528	fblocks = 0;
1529	fbuf = NULL;
1530	for (i = 0; i < nfblocks; i++)
1531	xfree((ptr_t) nfbuf[i]);
1532	xfree((ptr_t) nfbuf);
1533	}
1534	cpybin(B, st->B);
1535
1536	(void) close(SHIN);
1537
1538	insource = st->insource;
1539	SHIN = st->SHIN;
1540	arginp = st->arginp;
1541	onelflg = st->onelflg;
1542	evalp = st->evalp;
1543	evalvec = st->evalvec;
1544	alvecp = st->alvecp;
1545	alvec = st->alvec;
1546	intty = st->intty;
1547	whyles = st->whyles;
1548	gointr = st->gointr;
1549	if (st->HIST != '\0')
1550	HIST = st->HIST;
1551	enterhist = st->enterhist;
1552	cantell = st->cantell;
1553
1554	if (st->argv != NULL)
1555	setq(STRargv, st->argv, &shvhed, VAR_READWRITE);
1556	else if (av != NULL && *av != NULL && adrof(STRargv) != NULL)
1557	unsetv(STRargv);
1558	}
1559
1560	/*
1561	* Source to a unit. If onlyown it must be our file or our group or
1562	* we don't chance it. This occurs on ".cshrc"s and the like.
1563	*/
1564	static void
1565	srcunit(unit, onlyown, hflg, av)
1566	register int unit;
1567	bool onlyown;
1568	int hflg;
1569	Char **av;
1570	{
1571	struct saved_state st;
1572	st.SHIN = -1; /* st_restore checks this */
1573
1574	if (unit < 0)
1575	return;
1576
1577	if (didfds)
1578	donefds();
1579
1580	if (onlyown) {
1581	struct stat stb;
1582
1583	if (fstat(unit, &stb) < 0) {
1584	(void) close(unit);
1585	return;
1586	}
1587	}
1588
1589	getexit(st.oldexit);
1590
1591	if (setintr)
1592	#ifdef BSDSIGS
1593	st.mask = sigblock(sigmask(SIGINT));
1594	#else
1595	(void) sighold(SIGINT);
1596	#endif
1597
1598	/* Save the current state and move us to a new state */
1599	st_save(&st, unit, hflg, NULL, av);
1600
1601	/*
1602	* Now if we are allowing commands to be interrupted, we let ourselves be
1603	* interrupted.
1604	*/
1605	if (setintr)
1606	#ifdef BSDSIGS
1607	(void) sigsetmask(st.mask);
1608	#else
1609	(void) sigrelse(SIGINT);
1610	#endif
1611
1612	/*
1613	* Bugfix for running out of memory by: Jak Kirman
1614	* <jak%cs.brown.edu@RELAY.CS.NET>. Solution: pay attention to what
1615	* setexit() is returning because reenter _may_ be in a register, and
1616	* thus restored to 0 on a longjump(). (PWP: insert flames about
1617	* compiler-dependant code here) PWP: THANKS LOTS !!!
1618	*
1619	* PWP: think of this as like a LISP (unwind-protect ...)
1620	* thanks to Diana Smetters for pointing out how this _should_ be written
1621	*/
1622	#ifdef cray
1623	st.reenter = 1; /* assume non-zero return val */
1624	if (setexit() == 0) {
1625	st.reenter = 0; /* Oh well, we were wrong */
1626	#else
1627	if ((st.reenter = setexit()) == 0) {
1628	#endif
1629	process(0); /* 0 -> blow away on errors */
1630	}
1631
1632	if (setintr)
1633	#ifdef BSDSIGS
1634	(void) sigsetmask(st.mask);
1635	#else
1636	(void) sigrelse(SIGINT);
1637	#endif
1638
1639	/* Restore the old state */
1640	st_restore(&st, av);
1641	resexit(st.oldexit);
1642	/*
1643	* If process reset() (effectively an unwind) then we must also unwind.
1644	*/
1645	if (st.reenter)
1646	stderror(ERR_SILENT);
1647	}
1648
1649
1650	/ARGSUSED/
1651	void
1652	goodbye(v, c)
1653	Char **v;
1654	struct command *c;
1655	{
1656	USE(c);
1657	record();
1658
1659	if (loginsh) {
1660	(void) sigset(SIGQUIT, SIG_IGN);
1661	(void) sigset(SIGINT, SIG_IGN);
1662	(void) sigset(SIGTERM, SIG_IGN);
1663	(void) sigset(SIGHUP, SIG_IGN);
1664	setintr = 0; /* No interrupts after "logout" */
1665	/* Trap errors inside .logout */
1666	reenter = setexit();
1667	if (reenter != 0)
1668	exitstat();
1669	if (!(adrof(STRlogout)))
1670	set(STRlogout, Strsave(STRnormal), VAR_READWRITE);
1671	#ifdef _PATH_DOTLOGOUT
1672	(void) srcfile(_PATH_DOTLOGOUT, 0, 0, NULL);
1673	#endif
1674	if (adrof(STRhome))
1675	(void) srccat(varval(STRhome), STRsldtlogout);
1676	#ifdef TESLA
1677	do_logout = 1;
1678	#endif /* TESLA */
1679	}
1680	exitstat();
1681	}
1682
1683	void
1684	exitstat()
1685	{
1686	#ifdef PROF
1687	monitor(0);
1688	#endif
1689	/*
1690	* Note that if STATUS is corrupted (i.e. getn bombs) then error will exit
1691	* directly because we poke child here. Otherwise we might continue
1692	* unwarrantedly (sic).
1693	*/
1694	child = 1;
1695
1696	xexit(getn(varval(STRstatus)));
1697	}
1698
1699	/*
1700	* in the event of a HUP we want to save the history
1701	*/
1702	static sigret_t
1703	phup(snum)
1704	int snum;
1705	{
1706	/*
1707	* There is no return from here,
1708	* so we are not going to release SIGHUP
1709	* anymore
1710	*/
1711	#ifdef UNRELSIGS
1712	if (snum)
1713	(void) sigset(snum, SIG_IGN);
1714	#else
1715	# ifdef BSDSIGS
1716	(void) sigblock(sigmask(SIGHUP));
1717	# else
1718	(void) sighold(SIGHUP);
1719	# endif /* BSDSIGS */
1720	#endif /* UNRELSIGS */
1721
1722	if (loginsh) {
1723	set(STRlogout, Strsave(STRhangup), VAR_READWRITE);
1724	#ifdef _PATH_DOTLOGOUT
1725	(void) srcfile(_PATH_DOTLOGOUT, 0, 0, NULL);
1726	#endif
1727	if (adrof(STRhome))
1728	(void) srccat(varval(STRhome), STRsldtlogout);
1729	}
1730
1731	record();
1732
1733	#ifdef POSIXJOBS
1734	/*
1735	* We kill the last foreground process group. It then becomes
1736	* responsible to propagate the SIGHUP to its progeny.
1737	*/
1738	{
1739	struct process pp, np;
1740
1741	for (pp = proclist.p_next; pp; pp = pp->p_next) {
1742	np = pp;
1743	/*
1744	* Find if this job is in the foreground. It could be that
1745	* the process leader has exited and the foreground flag
1746	* is cleared for it.
1747	*/
1748	do
1749	/*
1750	* If a process is in the foreground we try to kill
1751	* it's process group. If we succeed, then the
1752	* whole job is gone. Otherwise we keep going...
1753	* But avoid sending HUP to the shell again.
1754	*/
1755	if (((np->p_flags & PFOREGND) != 0) && np->p_jobid != shpgrp) {
1756	np->p_flags &= ~PHUP;
1757	if (killpg(np->p_jobid, SIGHUP) != -1) {
1758	/* In case the job was suspended... */
1759	#ifdef SIGCONT
1760	(void) killpg(np->p_jobid, SIGCONT);
1761	#endif
1762	break;
1763	}
1764	}
1765	while ((np = np->p_friends) != pp);
1766	}
1767	}
1768	#endif /* POSIXJOBS */
1769
1770	xexit(snum);
1771	#ifndef SIGVOID
1772	return (snum);
1773	#endif
1774	}
1775
1776	static Char *jobargv[2] = {STRjobs, 0};
1777
1778	/*
1779	* Catch an interrupt, e.g. during lexical input.
1780	* If we are an interactive shell, we reset the interrupt catch
1781	* immediately. In any case we drain the shell output,
1782	* and finally go through the normal error mechanism, which
1783	* gets a chance to make the shell go away.
1784	*/
1785	int just_signaled; /* bugfix by Michael Bloom (mg@ttidca.TTI.COM) */
1786
1787	#ifdef SIGVOID
1788	/ARGSUSED/
1789	#endif
1790	sigret_t
1791	pintr(snum)
1792	int snum;
1793	{
1794	#ifdef UNRELSIGS
1795	if (snum)
1796	(void) sigset(snum, pintr);
1797	#endif /* UNRELSIGS */
1798	just_signaled = 1;
1799	pintr1(1);
1800	#ifndef SIGVOID
1801	return (snum);
1802	#endif
1803	}
1804
1805	void
1806	pintr1(wantnl)
1807	bool wantnl;
1808	{
1809	register Char **v;
1810	#ifdef BSDSIGS
1811	sigmask_t omask;
1812	#endif
1813
1814	#ifdef BSDSIGS
1815	omask = sigblock((sigmask_t) 0);
1816	#endif
1817	if (setintr) {
1818	#ifdef BSDSIGS
1819	(void) sigsetmask(omask & ~sigmask(SIGINT));
1820	#else
1821	(void) sigrelse(SIGINT);
1822	#endif
1823	if (pjobs) {
1824	pjobs = 0;
1825	xputchar('\n');
1826	dojobs(jobargv, NULL);
1827	stderror(ERR_NAME \| ERR_INTR);
1828	}
1829	}
1830	/* MH - handle interrupted completions specially */
1831	{
1832	extern int InsideCompletion;
1833
1834	if (InsideCompletion)
1835	stderror(ERR_SILENT);
1836	}
1837	/* JV - Make sure we shut off inputl */
1838	{
1839	extern Char GettingInput;
1840
1841	(void) Cookedmode();
1842	GettingInput = 0;
1843	}
1844	#ifdef BSDSIGS
1845	(void) sigsetmask(omask & ~sigmask(SIGCHLD));
1846	#else
1847	if (setintr)
1848	(void) sighold(SIGINT);
1849	(void) sigrelse(SIGCHLD);
1850	#endif
1851	draino();
1852	#if !defined(_VMS_POSIX) && !defined(WINNT)
1853	(void) endpwent();
1854	#endif /* !_VMS_POSIX && !WINNT */
1855
1856	/*
1857	* If we have an active "onintr" then we search for the label. Note that if
1858	* one does "onintr -" then we shan't be interruptible so we needn't worry
1859	* about that here.
1860	*/
1861	if (gointr) {
1862	gotolab(gointr);
1863	timflg = 0;
1864	if ((v = pargv) != 0)
1865	pargv = 0, blkfree(v);
1866	if ((v = gargv) != 0)
1867	gargv = 0, blkfree(v);
1868	reset();
1869	}
1870	else if (intty && wantnl) {
1871	if (editing) {
1872	/*
1873	* If we are editing a multi-line input command, and move to
1874	* the beginning of the line, we don't want to trash it when
1875	* we hit ^C
1876	*/
1877	PastBottom();
1878	ClearLines();
1879	ClearDisp();
1880	}
1881	else {
1882	/* xputchar('\n'); // Some like this, others don't */
1883	(void) putraw('\r');
1884	(void) putraw('\n');
1885	}
1886	}
1887	stderror(ERR_SILENT);
1888	}
1889
1890	/*
1891	* Process is the main driving routine for the shell.
1892	* It runs all command processing, except for those within { ... }
1893	* in expressions (which is run by a routine evalav in sh.exp.c which
1894	* is a stripped down process), and `...` evaluation which is run
1895	* also by a subset of this code in sh.glob.c in the routine backeval.
1896	*
1897	* The code here is a little strange because part of it is interruptible
1898	* and hence freeing of structures appears to occur when none is necessary
1899	* if this is ignored.
1900	*
1901	* Note that if catch is not set then we will unwind on any error.
1902	* If an end-of-file occurs, we return.
1903	*/
1904	static struct command *savet = NULL;
1905	void
1906	process(catch)
1907	bool catch;
1908	{
1909	extern char Expand;
1910	jmp_buf_t osetexit;
1911	/* PWP: This might get nuked my longjmp so don't make it a register var */
1912	struct command *t = savet;
1913
1914	savet = NULL;
1915	getexit(osetexit);
1916	for (;;) {
1917
1918	pendjob();
1919
1920	/* This was leaking memory badly, particularly when sourcing
1921	* files, etc.. For whatever reason we were arriving here with
1922	* allocated pointers still active, and the code was simply
1923	* overwriting them. I can't say I fully understand the
1924	* control flow here, but according to Purify this particular
1925	* leak has been plugged, and I haven't noticed any ill
1926	* effects.. (sg)
1927	*/
1928	if (paraml.next && paraml.next != &paraml)
1929	freelex(&paraml);
1930
1931	paraml.next = paraml.prev = &paraml;
1932	paraml.word = STRNULL;
1933	(void) setexit();
1934	justpr = enterhist; /* execute if not entering history */
1935
1936	/*
1937	* Interruptible during interactive reads
1938	*/
1939	if (setintr)
1940	#ifdef BSDSIGS
1941	(void) sigsetmask(sigblock((sigmask_t) 0) & ~sigmask(SIGINT));
1942	#else
1943	(void) sigrelse(SIGINT);
1944	#endif
1945
1946
1947	/*
1948	* For the sake of reset()
1949	*/
1950	freelex(&paraml);
1951	if (savet)
1952	freesyn(savet), savet = NULL;
1953
1954	if (haderr) {
1955	if (!catch) {
1956	/* unwind */
1957	doneinp = 0;
1958	savet = t;
1959	resexit(osetexit);
1960	reset();
1961	}
1962	haderr = 0;
1963	/*
1964	* Every error is eventually caught here or the shell dies. It is
1965	* at this point that we clean up any left-over open files, by
1966	* closing all but a fixed number of pre-defined files. Thus
1967	* routines don't have to worry about leaving files open due to
1968	* deeper errors... they will get closed here.
1969	*/
1970	closem();
1971	continue;
1972	}
1973	if (doneinp) {
1974	doneinp = 0;
1975	break;
1976	}
1977	if (chkstop)
1978	chkstop--;
1979	if (neednote)
1980	pnote();
1981	if (intty && prompt && evalvec == 0) {
1982	just_signaled = 0;
1983	mailchk();
1984	/*
1985	* Watch for logins/logouts. Next is scheduled commands stored
1986	* previously using "sched." Then execute periodic commands.
1987	* Following that, the prompt precmd is run.
1988	*/
1989	#ifndef HAVENOUTMP
1990	watch_login(0);
1991	#endif /* !HAVENOUTMP */
1992	sched_run(0);
1993	period_cmd();
1994	precmd();
1995	/*
1996	* If we are at the end of the input buffer then we are going to
1997	* read fresh stuff. Otherwise, we are rereading input and don't
1998	* need or want to prompt.
1999	*/
2000	if (fseekp == feobp && aret == F_SEEK)
2001	printprompt(0, NULL);
2002	flush();
2003	setalarm(1);
2004	}
2005	if (seterr) {
2006	xfree((ptr_t) seterr);
2007	seterr = NULL;
2008	}
2009
2010	/*
2011	* Echo not only on VERBOSE, but also with history expansion. If there
2012	* is a lexical error then we forego history echo.
2013	*/
2014	if ((lex(&paraml) && !seterr && intty && !tellwhat && !Expand &&
2015	!whyles) \|\| adrof(STRverbose)) {
2016	haderr = 1;
2017	prlex(&paraml);
2018	haderr = 0;
2019	}
2020	(void) alarm(0); /* Autologout OFF */
2021
2022	/*
2023	* The parser may lose space if interrupted.
2024	*/
2025	if (setintr)
2026	#ifdef BSDSIGS
2027	(void) sigblock(sigmask(SIGINT));
2028	#else
2029	(void) sighold(SIGINT);
2030	#endif
2031
2032	/*
2033	* Save input text on the history list if reading in old history, or it
2034	* is from the terminal at the top level and not in a loop.
2035	*
2036	* PWP: entry of items in the history list while in a while loop is done
2037	* elsewhere...
2038	*/
2039	if (enterhist \|\| (catch && intty && !whyles && !tellwhat && !arun))
2040	savehist(&paraml, enterhist > 1);
2041
2042	if (Expand && seterr)
2043	Expand = 0;
2044
2045	/*
2046	* Print lexical error messages, except when sourcing history lists.
2047	*/
2048	if (!enterhist && seterr)
2049	stderror(ERR_OLD);
2050
2051	/*
2052	* If had a history command :p modifier then this is as far as we
2053	* should go
2054	*/
2055	if (justpr)
2056	reset();
2057
2058	/*
2059	* If had a tellwhat from twenex() then do
2060	*/
2061	if (tellwhat) {
2062	(void) tellmewhat(&paraml, NULL);
2063	reset();
2064	}
2065
2066	alias(&paraml);
2067
2068	#ifdef BSDJOBS
2069	/*
2070	* If we are interactive, try to continue jobs that we have stopped
2071	*/
2072	if (prompt)
2073	continue_jobs(&paraml);
2074	#endif /* BSDJOBS */
2075
2076	/*
2077	* Check to see if the user typed "rm * .o" or something
2078	*/
2079	if (prompt)
2080	rmstar(&paraml);
2081	/*
2082	* Parse the words of the input into a parse tree.
2083	*/
2084	savet = syntax(paraml.next, &paraml, 0);
2085	if (seterr)
2086	stderror(ERR_OLD);
2087
2088	/*
2089	* Execute the parse tree From: Michael Schroeder
2090	* <mlschroe@immd4.informatik.uni-erlangen.de> was execute(t, tpgrp);
2091	*/
2092	execute(savet, (tpgrp > 0 ? tpgrp : -1), NULL, NULL);
2093
2094	/*
2095	* Made it!
2096	*/
2097	freelex(&paraml);
2098	freesyn(savet), savet = NULL;
2099	#ifdef SIG_WINDOW
2100	if (catch && intty && !whyles && !tellwhat)
2101	(void) window_change(0); /* for window systems */
2102	#endif /* SIG_WINDOW */
2103	}
2104	savet = t;
2105	resexit(osetexit);
2106	}
2107
2108	/ARGSUSED/
2109	void
2110	dosource(t, c)
2111	register Char **t;
2112	struct command *c;
2113	{
2114	register Char *f;
2115	bool hflg = 0;
2116	extern int bequiet;
2117	char buf[BUFSIZE];
2118
2119	USE(c);
2120	t++;
2121	if (t && eq(t, STRmh)) {
2122	if (*++t == NULL)
2123	stderror(ERR_NAME \| ERR_HFLAG);
2124	hflg++;
2125	}
2126	else if (t && eq(t, STRmm)) {
2127	if (*++t == NULL)
2128	stderror(ERR_NAME \| ERR_MFLAG);
2129	hflg = 2;
2130	}
2131
2132	f = globone(*t++, G_ERROR);
2133	(void) strcpy(buf, short2str(f));
2134	xfree((ptr_t) f);
2135	if ((!srcfile(buf, 0, hflg, t)) && (!hflg) && (!bequiet))
2136	stderror(ERR_SYSTEM, buf, strerror(errno));
2137	}
2138
2139	/*
2140	* Check for mail.
2141	* If we are a login shell, then we don't want to tell
2142	* about any mail file unless its been modified
2143	* after the time we started.
2144	* This prevents us from telling the user things he already
2145	* knows, since the login program insists on saying
2146	* "You have mail."
2147	*/
2148
2149	/*
2150	* The AMS version.
2151	* This version checks if the file is a directory, and if so,
2152	* tells you the number of files in it, otherwise do the old thang.
2153	* The magic "+1" in the time calculation is to compensate for
2154	* an AFS bug where directory mtimes are set to 1 second in
2155	* the future.
2156	*/
2157
2158	static void
2159	mailchk()
2160	{
2161	register struct varent *v;
2162	register Char **vp;
2163	time_t t;
2164	int intvl, cnt;
2165	struct stat stb;
2166	bool new;
2167
2168	v = adrof(STRmail);
2169	if (v == 0)
2170	return;
2171	(void) time(&t);
2172	vp = v->vec;
2173	cnt = blklen(vp);
2174	intvl = (cnt && number(vp)) ? (--cnt, getn(vp++)) : MAILINTVL;
2175	if (intvl < 1)
2176	intvl = 1;
2177	if (chktim + intvl > t)
2178	return;
2179	for (; *vp; vp++) {
2180	char filename = short2str(vp);
2181	char *mboxdir = filename;
2182
2183	if (stat(filename, &stb) < 0)
2184	continue;
2185	#if defined(BSDTIMES) \|\| defined(_SEQUENT_)
2186	new = stb.st_mtime > time0.tv_sec;
2187	#else
2188	new = stb.st_mtime > time0;
2189	#endif
2190	if (S_ISDIR(stb.st_mode)) {
2191	DIR *mailbox;
2192	int mailcount = 0;
2193	char tempfilename[MAXPATHLEN];
2194	struct stat stc;
2195
2196	xsnprintf(tempfilename, MAXPATHLEN, "%s/new", filename);
2197
2198	if (stat(tempfilename, &stc) != -1 && S_ISDIR(stc.st_mode)) {
2199	/*
2200	* "filename/new" exists and is a directory; you are
2201	* using Qmail.
2202	*/
2203	stb = stc;
2204	#if defined(BSDTIMES) \|\| defined(_SEQUENT_)
2205	new = stb.st_mtime > time0.tv_sec;
2206	#else
2207	new = stb.st_mtime > time0;
2208	#endif
2209	mboxdir = tempfilename;
2210	}
2211
2212	if (stb.st_mtime <= chktim + 1 \|\| (loginsh && !new))
2213	continue;
2214
2215	if ((mailbox = opendir(mboxdir)) == NULL)
2216	continue;
2217
2218	/* skip . and .. */
2219	if (!readdir(mailbox) \|\| !readdir(mailbox))
2220	continue;
2221
2222	while (readdir(mailbox))
2223	mailcount++;
2224
2225	if (mailcount == 0)
2226	continue;
2227
2228	if (cnt == 1)
2229	xprintf(CGETS(11, 3, "You have %d mail messages.\n"),
2230	mailcount);
2231	else
2232	xprintf(CGETS(11, 4, "You have %d mail messages in %s.\n"),
2233	mailcount, filename);
2234	}
2235	else {
2236	if (stb.st_size == 0 \|\| stb.st_atime > stb.st_mtime \|\|
2237	(stb.st_atime <= chktim && stb.st_mtime <= chktim) \|\|
2238	(loginsh && !new))
2239	continue;
2240	if (cnt == 1)
2241	xprintf(CGETS(11, 5, "You have %smail.\n"),
2242	new ? CGETS(11, 6, "new ") : "");
2243	else
2244	xprintf(CGETS(11, 7, "You have %smail in %s.\n"),
2245	new ? CGETS(11, 6, "new ") : "", filename);
2246	}
2247	}
2248	chktim = t;
2249	}
2250
2251	/*
2252	* Extract a home directory from the password file
2253	* The argument points to a buffer where the name of the
2254	* user whose home directory is sought is currently.
2255	* We write the home directory of the user back there.
2256	*/
2257	int
2258	gethdir(home)
2259	Char *home;
2260	{
2261	Char *h;
2262
2263	/*
2264	* Is it us?
2265	*/
2266	if (*home == '\0') {
2267	if ((h = varval(STRhome)) != STRNULL) {
2268	(void) Strcpy(home, h);
2269	return 0;
2270	}
2271	else
2272	return 1;
2273	}
2274
2275	/*
2276	* Look in the cache
2277	*/
2278	if ((h = gettilde(home)) == NULL)
2279	return 1;
2280	else {
2281	(void) Strcpy(home, h);
2282	return 0;
2283	}
2284	}
2285
2286	/*
2287	* Move the initial descriptors to their eventual
2288	* resting places, closing all other units.
2289	*/
2290	void
2291	initdesc()
2292	{
2293
2294	didfds = 0; /* 0, 1, 2 aren't set up */
2295	(void) close_on_exec(SHIN = dcopy(0, FSHIN), 1);
2296	(void) close_on_exec(SHOUT = dcopy(1, FSHOUT), 1);
2297	(void) close_on_exec(SHDIAG = dcopy(2, FSHDIAG), 1);
2298	(void) close_on_exec(OLDSTD = dcopy(SHIN, FOLDSTD), 1);
2299	#ifndef CLOSE_ON_EXEC
2300	didcch = 0; /* Havent closed for child */
2301	#endif /* CLOSE_ON_EXEC */
2302	isdiagatty = isatty(SHDIAG);
2303	isoutatty = isatty(SHOUT);
2304	closem();
2305	}
2306
2307
2308	void
2309	#ifdef PROF
2310	done(i)
2311	#else
2312	xexit(i)
2313	#endif
2314	int i;
2315	{
2316	#ifdef TESLA
2317	if (loginsh && do_logout) {
2318	/* this is to send hangup signal to the develcon */
2319	/* we toggle DTR. clear dtr - sleep 1 - set dtr */
2320	/* ioctl will return ENOTTY for pty's but we ignore it */
2321	/* exitstat will run after disconnect */
2322	/* we sleep for 2 seconds to let things happen in */
2323	/* .logout and rechist() */
2324	#ifdef TIOCCDTR
2325	(void) sleep(2);
2326	(void) ioctl(FSHTTY, TIOCCDTR, NULL);
2327	(void) sleep(1);
2328	(void) ioctl(FSHTTY, TIOCSDTR, NULL);
2329	#endif /* TIOCCDTR */
2330	}
2331	#endif /* TESLA */
2332
2333	{
2334	struct process pp, np;
2335
2336	/* Kill all processes marked for hup'ing */
2337	for (pp = proclist.p_next; pp; pp = pp->p_next) {
2338	np = pp;
2339	do
2340	if ((np->p_flags & PHUP) && np->p_jobid != shpgrp) {
2341	if (killpg(np->p_jobid, SIGHUP) != -1) {
2342	/* In case the job was suspended... */
2343	#ifdef SIGCONT
2344	(void) killpg(np->p_jobid, SIGCONT);
2345	#endif
2346	break;
2347	}
2348	}
2349	while ((np = np->p_friends) != pp);
2350	}
2351	}
2352	untty();
2353	#ifdef NLS_CATALOGS
2354	/*
2355	* We need to call catclose, because SVR4 leaves symlinks behind otherwise
2356	* in the catalog directories. We cannot close on a vforked() child,
2357	* because messages will stop working on the parent too.
2358	*/
2359	if (child == 0)
2360	(void) catclose(catd);
2361	#endif /* NLS_CATALOGS */
2362	#ifdef WINNT
2363	nt_cleanup();
2364	#endif /* WINNT */
2365	_exit(i);
2366	}
2367
2368	#ifndef _PATH_DEFPATH
2369	static Char **
2370	defaultpath()
2371	{
2372	char *ptr;
2373	Char blk, blkp;
2374	struct stat stb;
2375
2376	blkp = blk = (Char *) xmalloc((size_t) sizeof(Char ) * 10);
2377
2378	#ifndef NODOT
2379	# ifndef DOTLAST
2380	*blkp++ = Strsave(STRdot);
2381	# endif
2382	#endif
2383
2384	#define DIRAPPEND(a) \
2385	if (stat(ptr = a, &stb) == 0 && S_ISDIR(stb.st_mode)) \
2386	*blkp++ = SAVE(ptr)
2387
2388	#ifdef _PATH_LOCAL
2389	DIRAPPEND(_PATH_LOCAL);
2390	#endif
2391
2392	#ifdef _PATH_USRUCB
2393	DIRAPPEND(_PATH_USRUCB);
2394	#endif
2395
2396	#ifdef _PATH_USRBSD
2397	DIRAPPEND(_PATH_USRBSD);
2398	#endif
2399
2400	#ifdef _PATH_BIN
2401	DIRAPPEND(_PATH_BIN);
2402	#endif
2403
2404	#ifdef _PATH_USRBIN
2405	DIRAPPEND(_PATH_USRBIN);
2406	#endif
2407
2408	#undef DIRAPPEND
2409
2410	#ifndef NODOT
2411	# ifdef DOTLAST
2412	*blkp++ = Strsave(STRdot);
2413	# endif
2414	#endif
2415	*blkp = NULL;
2416	return (blk);
2417	}
2418	#endif
2419
2420	static void
2421	record()
2422	{
2423	if (!fast) {
2424	recdirs(NULL, adrof(STRsavedirs) != NULL);
2425	rechist(NULL, adrof(STRsavehist) != NULL);
2426	}
2427	}

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