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Revision 22039, 61.1 KB checked in by ghudson, 20 years ago (diff)
Merge with tcsh 6.14.00.

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1	/* $Header: /afs/dev.mit.edu/source/repository/third/tcsh/sh.c,v 1.4 2005-06-03 15:17:09 ghudson 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. Neither the name of the University nor the names of its contributors
18	* may be used to endorse or promote products derived from this software
19	* without specific prior written permission.
20	*
21	* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22	* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24	* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25	* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26	* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27	* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28	* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29	* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30	* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31	* SUCH DAMAGE.
32	*/
33	#define EXTERN /* Intern */
34	#include "sh.h"
35
36	#ifndef lint
37	char copyright[] =
38	"@(#) Copyright (c) 1991 The Regents of the University of California.\n\
39	All rights reserved.\n";
40	#endif /* not lint */
41
42	RCSID("$Id: sh.c,v 1.4 2005-06-03 15:17:09 ghudson Exp $")
43
44	#include "tc.h"
45	#include "ed.h"
46	#include "tw.h"
47
48	extern int MapsAreInited;
49	extern int NLSMapsAreInited;
50
51	/*
52	* C Shell
53	*
54	* Bill Joy, UC Berkeley, California, USA
55	* October 1978, May 1980
56	*
57	* Jim Kulp, IIASA, Laxenburg, Austria
58	* April 1980
59	*
60	* Filename recognition added:
61	* Ken Greer, Ind. Consultant, Palo Alto CA
62	* October 1983.
63	*
64	* Karl Kleinpaste, Computer Consoles, Inc.
65	* Added precmd, periodic/tperiod, prompt changes,
66	* directory stack hack, and login watch.
67	* Sometime March 1983 - Feb 1984.
68	*
69	* Added scheduled commands, including the "sched" command,
70	* plus the call to sched_run near the precmd et al
71	* routines.
72	* Upgraded scheduled events for running events while
73	* sitting idle at command input.
74	*
75	* Paul Placeway, Ohio State
76	* added stuff for running with twenex/inputl 9 Oct 1984.
77	*
78	* ported to Apple Unix (TM) (OREO) 26 -- 29 Jun 1987
79	*/
80
81	jmp_buf_t reslab INIT_ZERO_STRUCT;
82
83	static const char tcshstr[] = "tcsh";
84	#ifdef WINNT_NATIVE
85	static const char tcshstr_nt[] = "tcsh.exe";
86	#endif /* WINNT_NATIVE */
87
88	signalfun_t parintr = 0; /* Parents interrupt catch */
89	signalfun_t parterm = 0; /* Parents terminate catch */
90
91	#ifdef TESLA
92	int do_logout = 0;
93	#endif /* TESLA */
94
95
96	int use_fork = 0; /* use fork() instead of vfork()? */
97
98	/*
99	* Magic pointer values. Used to specify other invalid conditions aside
100	* from null.
101	*/
102	static Char INVCHAR;
103	Char *INVPTR = &INVCHAR;
104	Char **INVPPTR = &INVPTR;
105
106	static int nofile = 0;
107	static int reenter = 0;
108	static int nverbose = 0;
109	static int nexececho = 0;
110	static int quitit = 0;
111	static int rdirs = 0;
112	int fast = 0;
113	static int batch = 0;
114	static int mflag = 0;
115	static int prompt = 1;
116	int enterhist = 0;
117	int tellwhat = 0;
118	time_t t_period;
119	Char *ffile = NULL;
120	int dolzero = 0;
121	int insource = 0;
122	int exitset = 0;
123	static time_t chktim; /* Time mail last checked */
124	char *progname;
125	int tcsh;
126	extern char **environ;
127
128	/*
129	* This preserves the input state of the shell. It is used by
130	* st_save and st_restore to manupulate shell state.
131	*/
132	struct saved_state {
133	int insource;
134	int OLDSTD;
135	int SHIN;
136	int SHOUT;
137	int SHDIAG;
138	int intty;
139	struct whyle *whyles;
140	Char *gointr;
141	Char *arginp;
142	Char *evalp;
143	Char **evalvec;
144	Char *alvecp;
145	Char **alvec;
146	int onelflg;
147	int enterhist;
148	Char **argv;
149	Char HIST;
150	int cantell;
151	struct Bin B;
152	/* These keep signal state and setjump state */
153	#ifdef BSDSIGS
154	sigmask_t mask;
155	#endif
156	jmp_buf_t oldexit;
157	int reenter;
158	};
159
160	static int srccat __P((Char , Char ));
161	#ifndef WINNT_NATIVE
162	static int srcfile __P((const char , int, int, Char *));
163	#else
164	int srcfile __P((const char , int, int, Char *));
165	#endif /WINNT_NATIVE/
166	static RETSIGTYPE phup __P((int));
167	static void srcunit __P((int, int, int, Char **));
168	static void mailchk __P((void));
169	#ifndef _PATH_DEFPATH
170	static Char **defaultpath __P((void));
171	#endif
172	static void record __P((void));
173	static void st_save __P((struct saved_state *, int, int,
174	Char , Char ));
175	static void st_restore __P((struct saved_state , Char *));
176
177	int main __P((int, char **));
178
179	int
180	main(argc, argv)
181	int argc;
182	char **argv;
183	{
184	Char *cp;
185	#ifdef AUTOLOGOUT
186	Char *cp2;
187	#endif
188	char tcp, ttyn;
189	int f;
190	char **tempv;
191	int osetintr;
192	signalfun_t oparintr;
193
194	#ifdef BSDSIGS
195	sigvec_t osv;
196	#endif /* BSDSIGS */
197
198	#ifdef WINNT_NATIVE
199	nt_init();
200	#endif /* WINNT_NATIVE */
201	#if defined(NLS_CATALOGS) && defined(LC_MESSAGES)
202	(void) setlocale(LC_MESSAGES, "");
203	#endif /* NLS_CATALOGS && LC_MESSAGES */
204
205	#ifdef NLS
206	# ifdef LC_CTYPE
207	(void) setlocale(LC_CTYPE, ""); /* for iscntrl */
208	# endif /* LC_CTYPE */
209	#endif /* NLS */
210
211	nlsinit();
212
213	#ifdef MALLOC_TRACE
214	mal_setstatsfile(fdopen(dmove(open("/tmp/tcsh.trace",
215	O_WRONLY\|O_CREAT\|O_LARGEFILE, 0666), 25), "w"));
216	mal_trace(1);
217	#endif /* MALLOC_TRACE */
218
219	#if !(defined(BSDTIMES) \|\| defined(_SEQUENT_)) && defined(POSIX)
220	# ifdef _SC_CLK_TCK
221	clk_tck = (clock_t) sysconf(_SC_CLK_TCK);
222	# else /* ! _SC_CLK_TCK */
223	# ifdef CLK_TCK
224	clk_tck = CLK_TCK;
225	# else /* !CLK_TCK */
226	clk_tck = HZ;
227	# endif /* CLK_TCK */
228	# endif /* _SC_CLK_TCK */
229	#endif /* !BSDTIMES && POSIX */
230
231	settimes(); /* Immed. estab. timing base */
232	#ifdef TESLA
233	do_logout = 0;
234	#endif /* TESLA */
235
236	/*
237	* Make sure we have 0, 1, 2 open
238	* Otherwise `` jobs will not work... (From knaff@poly.polytechnique.fr)
239	*/
240	{
241	do
242	if ((f = open(_PATH_DEVNULL, O_RDONLY\|O_LARGEFILE)) == -1 &&
243	(f = open("/", O_RDONLY\|O_LARGEFILE)) == -1)
244	exit(1);
245	while (f < 3);
246	(void) close(f);
247	}
248
249	#ifdef O_TEXT
250	setmode(0, O_TEXT);
251	#endif
252
253	osinit(); /* Os dependent initialization */
254
255
256	{
257	char *t;
258
259	t = strrchr(argv[0], '/');
260	#ifdef WINNT_NATIVE
261	{
262	char *s = strrchr(argv[0], '\\');
263	if (s)
264	t = s;
265	}
266	#endif /* WINNT_NATIVE */
267	t = t ? t + 1 : argv[0];
268	if (*t == '-') t++;
269	progname = strsave((t && t) ? t : tcshstr); / never want a null */
270	tcsh = strcmp(progname, tcshstr) == 0;
271	}
272
273	/*
274	* Initialize non constant strings
275	*/
276	#ifdef _PATH_BSHELL
277	STR_BSHELL = SAVE(_PATH_BSHELL);
278	#endif
279	#ifdef _PATH_TCSHELL
280	STR_SHELLPATH = SAVE(_PATH_TCSHELL);
281	#else
282	# ifdef _PATH_CSHELL
283	STR_SHELLPATH = SAVE(_PATH_CSHELL);
284	# endif
285	#endif
286	STR_environ = blk2short(environ);
287	environ = short2blk(STR_environ); /* So that we can free it */
288	STR_WORD_CHARS = SAVE(WORD_CHARS);
289
290	HIST = '!';
291	HISTSUB = '^';
292	PRCH = '>';
293	PRCHROOT = '#';
294	word_chars = STR_WORD_CHARS;
295	bslash_quote = 0; /* PWP: do tcsh-style backslash quoting? */
296
297	/* Default history size to 100 */
298	set(STRhistory, SAVE("100"), VAR_READWRITE);
299
300	tempv = argv;
301	ffile = SAVE(tempv[0]);
302	dolzero = 0;
303	if (eq(ffile, STRaout)) /* A.out's are quittable */
304	quitit = 1;
305	uid = getuid();
306	gid = getgid();
307	euid = geteuid();
308	egid = getegid();
309	/*
310	* We are a login shell if: 1. we were invoked as -<something> with
311	* optional arguments 2. or we were invoked only with the -l flag
312	*/
313	loginsh = (**tempv == '-') \|\| (argc == 2 &&
314	tempv[1][0] == '-' && tempv[1][1] == 'l' &&
315	tempv[1][2] == '\0');
316	#ifdef _VMS_POSIX
317	/* No better way to find if we are a login shell */
318	if (!loginsh) {
319	loginsh = (argc == 1 && getppid() == 1);
320	*tempv = '-'; / Avoid giving VMS an acidic stomach */
321	}
322	#endif /* _VMS_POSIX */
323
324	if (loginsh && **tempv != '-') {
325	/*
326	* Mangle the argv space
327	*/
328	tempv[1][0] = '\0';
329	tempv[1][1] = '\0';
330	tempv[1] = NULL;
331	for (tcp = tempv; tcp++;)
332	continue;
333	for (tcp--; tcp >= *tempv; tcp--)
334	tcp[1] = tcp[0];
335	*++tcp = '-';
336	argc--;
337	}
338	if (loginsh) {
339	(void) time(&chktim);
340	set(STRloginsh, Strsave(STRNULL), VAR_READWRITE);
341	}
342
343	AsciiOnly = 1;
344	NoNLSRebind = getenv("NOREBIND") != NULL;
345	#ifdef NLS
346	# ifdef SETLOCALEBUG
347	dont_free = 1;
348	# endif /* SETLOCALEBUG */
349	(void) setlocale(LC_ALL, "");
350	# ifdef LC_COLLATE
351	(void) setlocale(LC_COLLATE, "");
352	# endif
353	# ifdef SETLOCALEBUG
354	dont_free = 0;
355	# endif /* SETLOCALEBUG */
356	# ifdef STRCOLLBUG
357	fix_strcoll_bug();
358	# endif /* STRCOLLBUG */
359
360	{
361	int k;
362
363	for (k = 0200; k <= 0377 && !Isprint(k); k++)
364	continue;
365	AsciiOnly = MB_CUR_MAX == 1 && k > 0377;
366	}
367	#else
368	AsciiOnly = getenv("LANG") == NULL && getenv("LC_CTYPE") == NULL;
369	#endif /* NLS */
370	if (MapsAreInited && !NLSMapsAreInited)
371	ed_InitNLSMaps();
372	ResetArrowKeys();
373
374	/*
375	* Initialize for periodic command intervals. Also, initialize the dummy
376	* tty list for login-watch.
377	*/
378	(void) time(&t_period);
379	#ifndef HAVENOUTMP
380	initwatch();
381	#endif /* !HAVENOUTMP */
382
383	#if defined(alliant)
384	/*
385	* From: Jim Pace <jdp@research.att.com>
386	* tcsh does not work properly on the alliants through an rlogin session.
387	* The shell generally hangs. Also, reference to the controlling terminal
388	* does not work ( ie: echo foo > /dev/tty ).
389	*
390	* A security feature was added to rlogind affecting FX/80's Concentrix
391	* from revision 5.5.xx upwards (through 5.7 where this fix was implemented)
392	* This security change also affects the FX/2800 series.
393	* The security change to rlogind requires the process group of an rlogin
394	* session become disassociated with the tty in rlogind.
395	*
396	* The changes needed are:
397	* 1. set the process group
398	* 2. reenable the control terminal
399	*/
400	if (loginsh && isatty(SHIN)) {
401	ttyn = (char *) ttyname(SHIN);
402	(void) close(SHIN);
403	SHIN = open(ttyn, O_RDWR\|O_LARGEFILE);
404	shpgrp = getpid();
405	(void) ioctl (SHIN, TIOCSPGRP, (ioctl_t) &shpgrp);
406	(void) setpgid(0, shpgrp);
407	}
408	#endif /* alliant */
409
410	/*
411	* Move the descriptors to safe places. The variable didfds is 0 while we
412	* have only FSH* to work with. When didfds is true, we have 0,1,2 and
413	* prefer to use these.
414	*/
415	initdesc();
416
417	/*
418	* Get and set the tty now
419	*/
420	if ((ttyn = ttyname(SHIN)) != NULL) {
421	/*
422	* Could use rindex to get rid of other possible path components, but
423	* hpux preserves the subdirectory /pty/ when storing the tty name in
424	* utmp, so we keep it too.
425	*/
426	if (strncmp(ttyn, "/dev/", 5) == 0)
427	set(STRtty, cp = SAVE(ttyn + 5), VAR_READWRITE);
428	else
429	set(STRtty, cp = SAVE(ttyn), VAR_READWRITE);
430	}
431	else
432	set(STRtty, cp = SAVE(""), VAR_READWRITE);
433	/*
434	* Initialize the shell variables. ARGV and PROMPT are initialized later.
435	* STATUS is also munged in several places. CHILD is munged when
436	* forking/waiting
437	*/
438
439	/*
440	* 7-10-87 Paul Placeway autologout should be set ONLY on login shells and
441	* on shells running as root. Out of these, autologout should NOT be set
442	* for any psudo-terminals (this catches most window systems) and not for
443	* any terminal running X windows.
444	*
445	* At Ohio State, we have had problems with a user having his X session
446	* drop out from under him (on a Sun) because the shell in his master
447	* xterm timed out and exited.
448	*
449	* Really, this should be done with a program external to the shell, that
450	* watches for no activity (and NO running programs, such as dump) on a
451	* terminal for a long peroid of time, and then SIGHUPS the shell on that
452	* terminal.
453	*
454	* bugfix by Rich Salz <rsalz@PINEAPPLE.BBN.COM>: For root rsh things
455	* allways first check to see if loginsh or really root, then do things
456	* with ttyname()
457	*
458	* Also by Jean-Francois Lamy <lamy%ai.toronto.edu@RELAY.CS.NET>: check the
459	* value of cp before using it! ("root can rsh too")
460	*
461	* PWP: keep the nested ifs; the order of the tests matters and a good
462	* (smart) C compiler might re-arange things wrong.
463	*/
464	#ifdef AUTOLOGOUT
465	# ifdef convex
466	if (uid == 0) {
467	/* root always has a 15 minute autologout */
468	set(STRautologout, Strsave(STRrootdefautologout), VAR_READWRITE);
469	}
470	else
471	if (loginsh)
472	/* users get autologout set to 0 */
473	set(STRautologout, Strsave(STR0), VAR_READWRITE);
474	# else /* convex */
475	if (loginsh \|\| (uid == 0)) {
476	if (*cp) {
477	/* only for login shells or root and we must have a tty */
478	if ((cp2 = Strrchr(cp, (Char) '/')) != NULL) {
479	cp = cp2 + 1;
480	}
481	else
482	cp2 = cp;
483	if (!(((Strncmp(cp2, STRtty, 3) == 0) && Isalpha(cp2[3])) \|\|
484	((Strncmp(cp, STRpts, 3) == 0) && cp[3] == '/'))) {
485	if (getenv("DISPLAY") == NULL) {
486	/* NOT on X window shells */
487	set(STRautologout, Strsave(STRdefautologout),
488	VAR_READWRITE);
489	}
490	}
491	}
492	}
493	# endif /* convex */
494	#endif /* AUTOLOGOUT */
495
496	(void) sigset(SIGALRM, alrmcatch);
497
498	set(STRstatus, Strsave(STR0), VAR_READWRITE);
499
500	/*
501	* get and set machine specific environment variables
502	*/
503	getmachine();
504
505
506	/*
507	* Publish the selected echo style
508	*/
509	#if ECHO_STYLE != BSD_ECHO
510	if (tcsh) {
511	# if ECHO_STYLE == NONE_ECHO
512	set(STRecho_style, Strsave(STRnone), VAR_READWRITE);
513	# endif /* ECHO_STYLE == NONE_ECHO */
514	# if ECHO_STYLE == SYSV_ECHO
515	set(STRecho_style, Strsave(STRsysv), VAR_READWRITE);
516	# endif /* ECHO_STYLE == SYSV_ECHO */
517	# if ECHO_STYLE == BOTH_ECHO
518	set(STRecho_style, Strsave(STRboth), VAR_READWRITE);
519	# endif /* ECHO_STYLE == BOTH_ECHO */
520	} else
521	#endif /* ECHO_STYLE != BSD_ECHO */
522	set(STRecho_style, Strsave(STRbsd), VAR_READWRITE);
523
524	/*
525	* increment the shell level.
526	*/
527	shlvl(1);
528
529	if ((tcp = getenv("HOME")) != NULL) {
530	if (strlen(tcp) >= MAXPATHLEN) {
531	struct passwd *pw;
532	if ((pw = getpwuid(getuid())) != NULL)
533	cp = quote(SAVE(pw->pw_dir));
534	else {
535	tcp[MAXPATHLEN-1] = '\0';
536	cp = quote(SAVE(tcp));
537	}
538	} else {
539	cp = quote(SAVE(tcp));
540	}
541	} else
542	cp = NULL;
543
544	if (cp == NULL)
545	fast = 1; /* No home -> can't read scripts */
546	else
547	set(STRhome, cp, VAR_READWRITE);
548
549	dinit(cp); /* dinit thinks that HOME == cwd in a login
550	* shell */
551	/*
552	* Grab other useful things from the environment. Should we grab
553	* everything??
554	*/
555	{
556	char cln, cus, *cgr;
557	Char buff[BUFSIZE];
558	struct passwd *pw;
559	struct group *gr;
560
561
562	#ifdef apollo
563	int oid = getoid();
564
565	(void) Itoa(oid, buff, 0, 0);
566	set(STRoid, Strsave(buff), VAR_READWRITE);
567	#endif /* apollo */
568
569	(void) Itoa(uid, buff, 0, 0);
570	set(STRuid, Strsave(buff), VAR_READWRITE);
571
572	(void) Itoa(gid, buff, 0, 0);
573	set(STRgid, Strsave(buff), VAR_READWRITE);
574
575	cln = getenv("LOGNAME");
576	cus = getenv("USER");
577	if (cus != NULL)
578	set(STRuser, quote(SAVE(cus)), VAR_READWRITE);
579	else if (cln != NULL)
580	set(STRuser, quote(SAVE(cln)), VAR_READWRITE);
581	else if ((pw = getpwuid(uid)) == NULL)
582	set(STRuser, SAVE("unknown"), VAR_READWRITE);
583	else
584	set(STRuser, SAVE(pw->pw_name), VAR_READWRITE);
585	if (cln == NULL)
586	tsetenv(STRLOGNAME, varval(STRuser));
587	if (cus == NULL)
588	tsetenv(STRKUSER, varval(STRuser));
589
590	cgr = getenv("GROUP");
591	if (cgr != NULL)
592	set(STRgroup, quote(SAVE(cgr)), VAR_READWRITE);
593	else if ((gr = getgrgid(gid)) == NULL)
594	set(STRgroup, SAVE("unknown"), VAR_READWRITE);
595	else
596	set(STRgroup, SAVE(gr->gr_name), VAR_READWRITE);
597	if (cgr == NULL)
598	tsetenv(STRKGROUP, varval(STRgroup));
599	}
600
601	/*
602	* HOST may be wrong, since rexd transports the entire environment on sun
603	* 3.x Just set it again
604	*/
605	{
606	char cbuff[MAXHOSTNAMELEN];
607
608	if (gethostname(cbuff, sizeof(cbuff)) >= 0) {
609	cbuff[sizeof(cbuff) - 1] = '\0'; /* just in case */
610	tsetenv(STRHOST, str2short(cbuff));
611	}
612	else
613	tsetenv(STRHOST, str2short("unknown"));
614	}
615
616
617	#ifdef REMOTEHOST
618	/*
619	* Try to determine the remote host we were logged in from.
620	*/
621	remotehost();
622	#endif /* REMOTEHOST */
623
624	#ifdef apollo
625	if ((tcp = getenv("SYSTYPE")) == NULL)
626	tcp = "bsd4.3";
627	tsetenv(STRSYSTYPE, quote(str2short(tcp)));
628	#endif /* apollo */
629
630	/*
631	* set editing on by default, unless running under Emacs as an inferior
632	* shell.
633	* We try to do this intelligently. If $TERM is available, then it
634	* should determine if we should edit or not. $TERM is preserved
635	* across rlogin sessions, so we will not get confused if we rlogin
636	* under an emacs shell. Another advantage is that if we run an
637	* xterm under an emacs shell, then the $TERM will be set to
638	* xterm, so we are going to want to edit. Unfortunately emacs
639	* does not restore all the tty modes, so xterm is not very well
640	* set up. But this is not the shell's fault.
641	* Also don't edit if $TERM == wm, for when we're running under an ATK app.
642	* Finally, emacs compiled under terminfo, sets the terminal to dumb,
643	* so disable editing for that too.
644	*
645	* Unfortunately, in some cases the initial $TERM setting is "unknown",
646	* "dumb", or "network" which is then changed in the user's startup files.
647	* We fix this by setting noediting here if $TERM is unknown/dumb and
648	* if noediting is set, we switch on editing if $TERM is changed.
649	*/
650	if ((tcp = getenv("TERM")) != NULL) {
651	set(STRterm, quote(SAVE(tcp)), VAR_READWRITE);
652	noediting = strcmp(tcp, "unknown") == 0 \|\| strcmp(tcp, "dumb") == 0 \|\|
653	strcmp(tcp, "network") == 0;
654	editing = strcmp(tcp, "emacs") != 0 && strcmp(tcp, "wm") != 0 &&
655	!noediting;
656	}
657	else {
658	noediting = 0;
659	editing = ((tcp = getenv("EMACS")) == NULL \|\| strcmp(tcp, "t") != 0);
660	}
661
662	/*
663	* The 'edit' variable is either set or unset. It doesn't
664	* need a value. Making it 'emacs' might be confusing.
665	*/
666	if (editing)
667	set(STRedit, Strsave(STRNULL), VAR_READWRITE);
668
669
670	/*
671	* still more mutability: make the complete routine automatically add the
672	* suffix of file names...
673	*/
674	set(STRaddsuffix, Strsave(STRNULL), VAR_READWRITE);
675
676	/*
677	* Compatibility with tcsh >= 6.12 by default
678	*/
679	set(STRcsubstnonl, Strsave(STRNULL), VAR_READWRITE);
680
681	/*
682	* Random default kill ring size
683	*/
684	set(STRkillring, SAVE("30"), VAR_READWRITE);
685
686	/*
687	* Re-initialize path if set in environment
688	*/
689	if ((tcp = getenv("PATH")) == NULL)
690	#ifdef _PATH_DEFPATH
691	importpath(str2short(_PATH_DEFPATH));
692	#else /* !_PATH_DEFPATH */
693	setq(STRpath, defaultpath(), &shvhed, VAR_READWRITE);
694	#endif /* _PATH_DEFPATH */
695	else
696	/* Importpath() allocates memory for the path, and the
697	* returned pointer from SAVE() was discarded, so
698	* this was a memory leak.. (sg)
699	*
700	* importpath(SAVE(tcp));
701	*/
702	importpath(str2short(tcp));
703
704
705	{
706	/* If the SHELL environment variable ends with "tcsh", set
707	* STRshell to the same path. This is to facilitate using
708	* the executable in environments where the compiled-in
709	* default isn't appropriate (sg).
710	*/
711
712	int sh_len = 0;
713
714	if ((tcp = getenv("SHELL")) != NULL) {
715	sh_len = strlen(tcp);
716	if ((sh_len >= 5 && strcmp(tcp + (sh_len - 5), "/tcsh") == 0) \|\|
717	(!tcsh && sh_len >= 4 && strcmp(tcp + (sh_len - 4), "/csh") == 0))
718	set(STRshell, quote(SAVE(tcp)), VAR_READWRITE);
719	else
720	sh_len = 0;
721	}
722	if (sh_len == 0)
723	set(STRshell, Strsave(STR_SHELLPATH), VAR_READWRITE);
724	}
725
726	#ifdef COLOR_LS_F
727	if ((tcp = getenv("LS_COLORS")) != NULL)
728	parseLS_COLORS(str2short(tcp));
729	#endif /* COLOR_LS_F */
730
731	doldol = putn((int) getpid()); /* For $$ */
732	#ifdef WINNT_NATIVE
733	{
734	char *strtmp1, strtmp2[MAXPATHLEN];
735	if ((strtmp1 = getenv("TMP")) != NULL)
736	wsprintf(strtmp2, "%s/%s", strtmp1, "sh");
737	shtemp = Strspl(SAVE(strtmp2), doldol); /* For << */
738	}
739	#else /* !WINNT_NATIVE */
740	shtemp = Strspl(STRtmpsh, doldol); /* For << */
741	#endif /* WINNT_NATIVE */
742
743	/*
744	* Record the interrupt states from the parent process. If the parent is
745	* non-interruptible our hand must be forced or we (and our children) won't
746	* be either. Our children inherit termination from our parent. We catch it
747	* only if we are the login shell.
748	*/
749	#ifdef BSDSIGS
750	/*
751	* PURIFY-2 claims that osv does not get
752	* initialized after the sigvec call
753	*/
754	setzero((char*) &osv, sizeof(osv));
755	/* parents interruptibility */
756	(void) mysigvec(SIGINT, NULL, &osv);
757	parintr = (signalfun_t) osv.sv_handler;
758	(void) mysigvec(SIGTERM, NULL, &osv);
759	parterm = (signalfun_t) osv.sv_handler;
760	#else /* BSDSIGS */
761	parintr = signal(SIGINT, SIG_IGN); /* parents interruptibility */
762	(void) sigset(SIGINT, parintr); /* ... restore */
763
764	# ifdef COHERENT
765	if (loginsh) /* it seems that SIGTERM is always set to SIG_IGN by */
766	/* init/getty so it should be set to SIG_DFL - there may be */
767	/* a better fix for this. */
768	parterm = SIG_DFL;
769	else
770	# else /* !COHERENT */
771	parterm = signal(SIGTERM, SIG_IGN); /* parents terminability */
772	# endif /* COHERENT */
773	(void) sigset(SIGTERM, parterm); /* ... restore */
774
775	#endif /* BSDSIGS */
776
777
778	#ifdef TCF
779	/* Enable process migration on ourselves and our progeny */
780	(void) signal(SIGMIGRATE, SIG_DFL);
781	#endif /* TCF */
782
783	/*
784	* dspkanji/dspmbyte autosetting
785	*/
786	/* PATCH IDEA FROM Issei.Suzuki VERY THANKS */
787	#if defined(DSPMBYTE)
788	#if defined(NLS) && defined(LC_CTYPE)
789	if (((tcp = setlocale(LC_CTYPE, NULL)) != NULL \|\| (tcp = getenv("LANG")) != NULL) && !adrof(CHECK_MBYTEVAR)) {
790	#else
791	if ((tcp = getenv("LANG")) != NULL && !adrof(CHECK_MBYTEVAR)) {
792	#endif
793	autoset_dspmbyte(str2short(tcp));
794	}
795	#if defined(WINNT_NATIVE)
796	else if (!adrof(CHECK_MBYTEVAR))
797	nt_autoset_dspmbyte();
798	#endif /* WINNT_NATIVE */
799	#endif
800
801	fix_version(); /* publish the shell version */
802
803	if (argc > 1 && strcmp(argv[1], "--version") == 0) {
804	xprintf("%S\n", varval(STRversion));
805	xexit(0);
806	}
807	if (argc > 1 && strcmp(argv[1], "--help") == 0) {
808	xprintf("%S\n\n", varval(STRversion));
809	xprintf(CGETS(11, 8, HELP_STRING));
810	xexit(0);
811	}
812	/*
813	* Process the arguments.
814	*
815	* Note that processing of -v/-x is actually delayed till after script
816	* processing.
817	*
818	* We set the first character of our name to be '-' if we are a shell
819	* running interruptible commands. Many programs which examine ps'es
820	* use this to filter such shells out.
821	*/
822	argc--, tempv++;
823	while (argc > 0 && (tcp = tempv[0])[0] == '-' &&
824	*++tcp != '\0' && !batch) {
825	do
826	switch (*tcp++) {
827
828	case 0: /* - Interruptible, no prompt */
829	prompt = 0;
830	setintr = 1;
831	nofile = 1;
832	break;
833
834	case 'b': /* -b Next arg is input file */
835	batch = 1;
836	break;
837
838	case 'c': /* -c Command input from arg */
839	if (argc == 1)
840	xexit(0);
841	argc--, tempv++;
842	#ifdef M_XENIX
843	/* Xenix Vi bug:
844	it relies on a 7 bit environment (/bin/sh), so it
845	pass ascii arguments with the 8th bit set */
846	if (!strcmp(argv[0], "sh"))
847	{
848	char *p;
849
850	for (p = tempv[0]; *p; ++p)
851	*p &= ASCII;
852	}
853	#endif
854	arginp = SAVE(tempv[0]);
855
856	/*
857	* we put the command into a variable
858	*/
859	if (arginp != NULL)
860	set(STRcommand, quote(Strsave(arginp)), VAR_READWRITE);
861
862	/*
863	* * Give an error on -c arguments that end in * backslash to
864	* ensure that you don't make * nonportable csh scripts.
865	*/
866	{
867	int count;
868
869	cp = arginp + Strlen(arginp);
870	count = 0;
871	while (cp > arginp && *--cp == '\\')
872	++count;
873	if ((count & 1) != 0) {
874	exiterr = 1;
875	stderror(ERR_ARGC);
876	}
877	}
878	prompt = 0;
879	nofile = 1;
880	break;
881	case 'd': /* -d Load directory stack from file */
882	rdirs = 1;
883	break;
884
885	#ifdef apollo
886	case 'D': /* -D Define environment variable */
887	{
888	Char *dp;
889
890	cp = str2short(tcp);
891	if (dp = Strchr(cp, '=')) {
892	*dp++ = '\0';
893	tsetenv(cp, dp);
894	}
895	else
896	tsetenv(cp, STRNULL);
897	}
898	tcp = '\0'; / done with this argument */
899	break;
900	#endif /* apollo */
901
902	case 'e': /* -e Exit on any error */
903	exiterr = 1;
904	break;
905
906	case 'f': /* -f Fast start */
907	fast = 1;
908	break;
909
910	case 'i': /* -i Interactive, even if !intty */
911	intact = 1;
912	nofile = 1;
913	break;
914
915	case 'm': /* -m read .cshrc (from su) */
916	mflag = 1;
917	break;
918
919	case 'n': /* -n Don't execute */
920	noexec = 1;
921	break;
922
923	case 'q': /* -q (Undoc'd) ... die on quit */
924	quitit = 1;
925	break;
926
927	case 's': /* -s Read from std input */
928	nofile = 1;
929	break;
930
931	case 't': /* -t Read one line from input */
932	onelflg = 2;
933	prompt = 0;
934	nofile = 1;
935	break;
936
937	case 'v': /* -v Echo hist expanded input */
938	nverbose = 1; /* ... later */
939	break;
940
941	case 'x': /* -x Echo just before execution */
942	nexececho = 1; /* ... later */
943	break;
944
945	case 'V': /* -V Echo hist expanded input */
946	setNS(STRverbose); /* NOW! */
947	break;
948
949	case 'X': /* -X Echo just before execution */
950	setNS(STRecho); /* NOW! */
951	break;
952
953	case 'F': /* Undocumented flag */
954	/*
955	* This will cause children to be created using fork instead of
956	* vfork.
957	*/
958	use_fork = 1;
959	break;
960
961	case ' ':
962	case '\t':
963	/*
964	* for O/S's that don't do the argument parsing right in
965	* "#!/foo -f " scripts
966	*/
967	break;
968
969	default: /* Unknown command option */
970	exiterr = 1;
971	stderror(ERR_TCSHUSAGE, tcp-1, progname);
972	break;
973
974	} while (*tcp);
975	tempv++, argc--;
976	}
977
978	if (quitit) /* With all due haste, for debugging */
979	(void) signal(SIGQUIT, SIG_DFL);
980
981	/*
982	* Unless prevented by -, -c, -i, -s, or -t, if there are remaining
983	* arguments the first of them is the name of a shell file from which to
984	* read commands.
985	*/
986	if (nofile == 0 && argc > 0) {
987	nofile = open(tempv[0], O_RDONLY\|O_LARGEFILE);
988	if (nofile < 0) {
989	child = 1; /* So this ... */
990	/* ... doesn't return */
991	stderror(ERR_SYSTEM, tempv[0], strerror(errno));
992	}
993	#ifdef O_TEXT
994	setmode(nofile, O_TEXT);
995	#endif
996	if (ffile != NULL)
997	xfree((ptr_t) ffile);
998	dolzero = 1;
999	ffile = SAVE(tempv[0]);
1000	/*
1001	* Replace FSHIN. Handle /dev/std{in,out,err} specially
1002	* since once they are closed we cannot open them again.
1003	* In that case we use our own saved descriptors
1004	*/
1005	if ((SHIN = dmove(nofile, FSHIN)) < 0)
1006	switch(nofile) {
1007	case 0:
1008	SHIN = FSHIN;
1009	break;
1010	case 1:
1011	SHIN = FSHOUT;
1012	break;
1013	case 2:
1014	SHIN = FSHDIAG;
1015	break;
1016	default:
1017	stderror(ERR_SYSTEM, tempv[0], strerror(errno));
1018	break;
1019	}
1020	(void) close_on_exec(SHIN, 1);
1021	prompt = 0;
1022	/* argc not used any more */ tempv++;
1023	}
1024
1025	/*
1026	* Call to closem() used to be part of initdesc(). Now called below where
1027	* the script name argument has become stdin. Kernel may have used a file
1028	* descriptor to hold the name of the script (setuid case) and this name
1029	* mustn't be lost by closing the fd too soon.
1030	*/
1031	closem();
1032
1033	/*
1034	* Consider input a tty if it really is or we are interactive. but not for
1035	* editing (christos)
1036	*/
1037	if (!(intty = isatty(SHIN))) {
1038	if (adrof(STRedit))
1039	unsetv(STRedit);
1040	editing = 0;
1041	}
1042	intty \|= intact;
1043	#ifndef convex
1044	if (intty \|\| (intact && isatty(SHOUT))) {
1045	if (!batch && (uid != euid \|\| gid != egid)) {
1046	errno = EACCES;
1047	child = 1; /* So this ... */
1048	/* ... doesn't return */
1049	stderror(ERR_SYSTEM, progname, strerror(errno));
1050	}
1051	}
1052	#endif /* convex */
1053	isoutatty = isatty(SHOUT);
1054	isdiagatty = isatty(SHDIAG);
1055	/*
1056	* Decide whether we should play with signals or not. If we are explicitly
1057	* told (via -i, or -) or we are a login shell (arg0 starts with -) or the
1058	* input and output are both the ttys("csh", or "csh</dev/ttyx>/dev/ttyx")
1059	* Note that in only the login shell is it likely that parent may have set
1060	* signals to be ignored
1061	*/
1062	if (loginsh \|\| intact \|\| (intty && isatty(SHOUT)))
1063	setintr = 1;
1064	settell();
1065	/*
1066	* Save the remaining arguments in argv.
1067	*/
1068	setq(STRargv, blk2short(tempv), &shvhed, VAR_READWRITE);
1069
1070	/*
1071	* Set up the prompt.
1072	*/
1073	if (prompt) {
1074	if (tcsh)
1075	set(STRprompt, Strsave(STRdeftcshprompt), VAR_READWRITE);
1076	else
1077	set(STRprompt, Strsave(STRdefcshprompt), VAR_READWRITE);
1078	/* that's a meta-questionmark */
1079	set(STRprompt2, Strsave(STRmquestion), VAR_READWRITE);
1080	set(STRprompt3, Strsave(STRKCORRECT), VAR_READWRITE);
1081	}
1082
1083	/*
1084	* If we are an interactive shell, then start fiddling with the signals;
1085	* this is a tricky game.
1086	*/
1087	shpgrp = mygetpgrp();
1088	opgrp = tpgrp = -1;
1089	if (setintr) {
1090	signalfun_t osig;
1091	**argv = '-';
1092	if (!quitit) /* Wary! */
1093	(void) signal(SIGQUIT, SIG_IGN);
1094	(void) sigset(SIGINT, pintr);
1095	(void) sighold(SIGINT);
1096	(void) signal(SIGTERM, SIG_IGN);
1097
1098	/*
1099	* No reason I can see not to save history on all these events..
1100	* Most usual occurrence is in a window system, where we're not a login
1101	* shell, but might as well be... (sg)
1102	* But there might be races when lots of shells exit together...
1103	* [this is also incompatible].
1104	* We have to be mre careful here. If the parent wants to
1105	* ignore the signals then we leave them untouched...
1106	* We also only setup the handlers for shells that are trully
1107	* interactive.
1108	*/
1109	osig = signal(SIGHUP, phup); /* exit processing on HUP */
1110	if (!loginsh && osig == SIG_IGN)
1111	(void) signal(SIGHUP, osig);
1112	#ifdef SIGXCPU
1113	osig = signal(SIGXCPU, phup); /* exit processing on XCPU */
1114	if (!loginsh && osig == SIG_IGN)
1115	(void) signal(SIGXCPU, osig);
1116	#endif
1117	#ifdef SIGXFSZ
1118	osig = signal(SIGXFSZ, phup); /* exit processing on XFSZ */
1119	if (!loginsh && osig == SIG_IGN)
1120	(void) signal(SIGXFSZ, osig);
1121	#endif
1122
1123	if (quitit == 0 && arginp == 0) {
1124	#ifdef SIGTSTP
1125	(void) signal(SIGTSTP, SIG_IGN);
1126	#endif
1127	#ifdef SIGTTIN
1128	(void) signal(SIGTTIN, SIG_IGN);
1129	#endif
1130	#ifdef SIGTTOU
1131	(void) signal(SIGTTOU, SIG_IGN);
1132	#endif
1133	/*
1134	* Wait till in foreground, in case someone stupidly runs csh &
1135	* dont want to try to grab away the tty.
1136	*/
1137	if (isatty(FSHDIAG))
1138	f = FSHDIAG;
1139	else if (isatty(FSHOUT))
1140	f = FSHOUT;
1141	else if (isatty(OLDSTD))
1142	f = OLDSTD;
1143	else
1144	f = -1;
1145
1146	#ifdef NeXT
1147	/* NeXT 2.0 /usr/etc/rlogind, does not set our process group! */
1148	if (shpgrp == 0) {
1149	shpgrp = getpid();
1150	(void) setpgid(0, shpgrp);
1151	(void) tcsetpgrp(f, shpgrp);
1152	}
1153	#endif /* NeXT */
1154	#ifdef BSDJOBS /* if we have tty job control */
1155	retry:
1156	if ((tpgrp = tcgetpgrp(f)) != -1) {
1157	if (tpgrp != shpgrp) {
1158	signalfun_t old = signal(SIGTTIN, SIG_DFL);
1159	(void) kill(0, SIGTTIN);
1160	(void) signal(SIGTTIN, old);
1161	goto retry;
1162	}
1163	/*
1164	* Thanks to Matt Day for the POSIX references, and to
1165	* Paul Close for the SGI clarification.
1166	*/
1167	if (setdisc(f) != -1) {
1168	opgrp = shpgrp;
1169	shpgrp = getpid();
1170	tpgrp = shpgrp;
1171	if (tcsetpgrp(f, shpgrp) == -1) {
1172	/*
1173	* On hpux 7.03 this fails with EPERM. This happens on
1174	* the 800 when opgrp != shpgrp at this point. (we were
1175	* forked from a non job control shell)
1176	* POSIX 7.2.4, says we failed because the process
1177	* group specified did not belong to a process
1178	* in the same session with the tty. So we set our
1179	* process group and try again.
1180	*/
1181	if (setpgid(0, shpgrp) == -1) {
1182	xprintf("setpgid:");
1183	goto notty;
1184	}
1185	if (tcsetpgrp(f, shpgrp) == -1) {
1186	xprintf("tcsetpgrp:");
1187	goto notty;
1188	}
1189	}
1190	/*
1191	* We check the process group now. If it is the same, then
1192	* we don't need to set it again. On hpux 7.0 on the 300's
1193	* if we set it again it fails with EPERM. This is the
1194	* correct behavior according to POSIX 4.3.3 if the process
1195	* was a session leader .
1196	*/
1197	else if (shpgrp != mygetpgrp()) {
1198	if(setpgid(0, shpgrp) == -1) {
1199	xprintf("setpgid:");
1200	goto notty;
1201	}
1202	}
1203	#ifdef IRIS4D
1204	/*
1205	* But on irix 3.3 we need to set it again, even if it is
1206	* the same. We do that to tell the system that we
1207	* need BSD process group compatibility.
1208	*/
1209	else
1210	(void) setpgid(0, shpgrp);
1211	#endif
1212	(void) close_on_exec(dcopy(f, FSHTTY), 1);
1213	}
1214	else
1215	tpgrp = -1;
1216	}
1217	if (tpgrp == -1) {
1218	notty:
1219	xprintf(CGETS(11, 1, "Warning: no access to tty (%s).\n"),
1220	strerror(errno));
1221	xprintf(CGETS(11, 2, "Thus no job control in this shell.\n"));
1222	/*
1223	* Fix from:Sakari Jalovaara <sja@sirius.hut.fi> if we don't
1224	* have access to tty, disable editing too
1225	*/
1226	if (adrof(STRedit))
1227	unsetv(STRedit);
1228	editing = 0;
1229	}
1230	#else /* BSDJOBS / / don't have job control, so frotz it */
1231	tpgrp = -1;
1232	#endif /* BSDJOBS */
1233	}
1234	}
1235	if ((setintr == 0) && (parintr == SIG_DFL))
1236	setintr = 1;
1237
1238	/*
1239	* SVR4 doesn't send a SIGCHLD when a child is stopped or continued if the
1240	* handler is installed with signal(2) or sigset(2). sigaction(2) must
1241	* be used instead.
1242	*
1243	* David Dawes (dawes@physics.su.oz.au) Sept 1991
1244	*/
1245
1246	#if SYSVREL > 3
1247	{
1248	struct sigaction act;
1249	act.sa_handler=pchild;
1250	(void) sigemptyset(&(act.sa_mask)); /* Don't block any extra sigs
1251	* when the handler is called
1252	*/
1253	act.sa_flags=0; /* want behaviour of sigset() without
1254	* SA_NOCLDSTOP
1255	*/
1256
1257	if ((sigaction(SIGCHLD,&act,(struct sigaction *)NULL)) == -1)
1258	stderror(ERR_SYSTEM, "sigaction", strerror(errno));
1259	}
1260	#else /* SYSVREL <= 3 */
1261	(void) sigset(SIGCHLD, pchild); /* while signals not ready */
1262	#endif /* SYSVREL <= 3 */
1263
1264
1265	if (intty && !arginp)
1266	(void) ed_Setup(editing);/* Get the tty state, and set defaults */
1267	/* Only alter the tty state if editing */
1268
1269	/*
1270	* Set an exit here in case of an interrupt or error reading the shell
1271	* start-up scripts.
1272	*/
1273	osetintr = setintr;
1274	oparintr = parintr;
1275	reenter = setexit(); /* PWP */
1276	exitset++;
1277	haderr = 0; /* In case second time through */
1278	if (!fast && reenter == 0) {
1279	/* Will have varval(STRhome) here because set fast if don't */
1280	{
1281	#ifdef BSDSIGS
1282	sigmask_t omask = sigblock(sigmask(SIGINT));
1283	#else
1284	(void) sighold(SIGINT);
1285	#endif
1286	setintr = 0;
1287	parintr = SIG_IGN; /* onintr in /etc/ files has no effect */
1288	#ifdef LOGINFIRST
1289	#ifdef _PATH_DOTLOGIN
1290	if (loginsh)
1291	(void) srcfile(_PATH_DOTLOGIN, 0, 0, NULL);
1292	#endif
1293	#endif
1294
1295	#ifdef _PATH_DOTCSHRC
1296	(void) srcfile(_PATH_DOTCSHRC, 0, 0, NULL);
1297	#endif
1298	if (!arginp && !onelflg && !havhash)
1299	dohash(NULL,NULL);
1300	#ifndef LOGINFIRST
1301	#ifdef _PATH_DOTLOGIN
1302	if (loginsh)
1303	(void) srcfile(_PATH_DOTLOGIN, 0, 0, NULL);
1304	#endif
1305	#endif
1306	#ifdef BSDSIGS
1307	(void) sigsetmask(omask);
1308	#else
1309	(void) sigrelse(SIGINT);
1310	#endif
1311	setintr = osetintr;
1312	parintr = oparintr;
1313	}
1314	#ifdef LOGINFIRST
1315	if (loginsh)
1316	(void) srccat(varval(STRhome), STRsldotlogin);
1317	#endif
1318	(void) srccat(varval(STRhome), STRsldottcshrc);
1319	(void) srccat(varval(STRhome), STRsldotcshrc);
1320
1321	if (!fast && !arginp && !onelflg && !havhash)
1322	dohash(NULL,NULL);
1323
1324	/*
1325	* Source history before .login so that it is available in .login
1326	*/
1327	loadhist(NULL, 0);
1328	#ifndef LOGINFIRST
1329	if (loginsh)
1330	(void) srccat(varval(STRhome), STRsldotlogin);
1331	#endif
1332	if (!fast && (loginsh \|\| rdirs))
1333	loaddirs(NULL);
1334	}
1335	/* Reset interrupt flag */
1336	setintr = osetintr;
1337	parintr = oparintr;
1338
1339	/* Initing AFTER .cshrc is the Right Way */
1340	if (intty && !arginp) { /* PWP setup stuff */
1341	ed_Init(); /* init the new line editor */
1342	#ifdef SIG_WINDOW
1343	check_window_size(1); /* mung environment */
1344	#endif /* SIG_WINDOW */
1345	}
1346
1347	/*
1348	* Now are ready for the -v and -x flags
1349	*/
1350	if (nverbose)
1351	setNS(STRverbose);
1352	if (nexececho)
1353	setNS(STRecho);
1354
1355	/*
1356	* All the rest of the world is inside this call. The argument to process
1357	* indicates whether it should catch "error unwinds". Thus if we are a
1358	* interactive shell our call here will never return by being blown past on
1359	* an error.
1360	*/
1361	process(setintr);
1362
1363	/*
1364	* Mop-up.
1365	*/
1366	if (intty) {
1367	if (loginsh) {
1368	xprintf("logout\n");
1369	(void) close(SHIN);
1370	child = 1;
1371	#ifdef TESLA
1372	do_logout = 1;
1373	#endif /* TESLA */
1374	goodbye(NULL, NULL);
1375	}
1376	else {
1377	xprintf("exit\n");
1378	}
1379	}
1380	record();
1381	exitstat();
1382	return (0);
1383	}
1384
1385	void
1386	untty()
1387	{
1388	#ifdef BSDJOBS
1389	if (tpgrp > 0 && opgrp != shpgrp) {
1390	(void) setpgid(0, opgrp);
1391	(void) tcsetpgrp(FSHTTY, opgrp);
1392	(void) resetdisc(FSHTTY);
1393	}
1394	#endif /* BSDJOBS */
1395	}
1396
1397	void
1398	importpath(cp)
1399	Char *cp;
1400	{
1401	int i = 0;
1402	Char *dp;
1403	Char **pv;
1404	int c;
1405
1406	for (dp = cp; *dp; dp++)
1407	if (*dp == PATHSEP)
1408	i++;
1409	/*
1410	* i+2 where i is the number of colons in the path. There are i+1
1411	* directories in the path plus we need room for a zero terminator.
1412	*/
1413	pv = (Char *) xcalloc((size_t) (i + 2), sizeof(Char ));
1414	dp = cp;
1415	i = 0;
1416	if (*dp)
1417	for (;;) {
1418	if ((c = *dp) == PATHSEP \|\| c == 0) {
1419	*dp = 0;
1420	pv[i++] = Strsave(*cp ? cp : STRdot);
1421	if (c) {
1422	cp = dp + 1;
1423	*dp = PATHSEP;
1424	}
1425	else
1426	break;
1427	}
1428	#ifdef WINNT_NATIVE
1429	else if (*dp == '\\')
1430	*dp = '/';
1431	#endif /* WINNT_NATIVE */
1432	dp++;
1433	}
1434	pv[i] = 0;
1435	setq(STRpath, pv, &shvhed, VAR_READWRITE);
1436	}
1437
1438	/*
1439	* Source to the file which is the catenation of the argument names.
1440	*/
1441	static int
1442	srccat(cp, dp)
1443	Char cp, dp;
1444	{
1445	if (cp[0] == '/' && cp[1] == '\0')
1446	return srcfile(short2str(dp), (mflag ? 0 : 1), 0, NULL);
1447	else {
1448	Char *ep;
1449	char *ptr;
1450	int rv;
1451
1452	#ifdef WINNT_NATIVE
1453	ep = cp;
1454	while(*ep)
1455	ep++;
1456	if (ep[-1] == '/' && dp[0] == '/') /* silly win95 */
1457	dp++;
1458	#endif /* WINNT_NATIVE */
1459
1460	ep = Strspl(cp, dp);
1461	ptr = short2str(ep);
1462
1463	rv = srcfile(ptr, (mflag ? 0 : 1), 0, NULL);
1464	xfree((ptr_t) ep);
1465	return rv;
1466	}
1467	}
1468
1469	/*
1470	* Source to a file putting the file descriptor in a safe place (> 2).
1471	*/
1472	#ifndef WINNT_NATIVE
1473	static int
1474	#else
1475	int
1476	#endif /WINNT_NATIVE/
1477	srcfile(f, onlyown, flag, av)
1478	const char *f;
1479	int onlyown;
1480	int flag;
1481	Char **av;
1482	{
1483	int unit;
1484
1485	if ((unit = open(f, O_RDONLY\|O_LARGEFILE)) == -1)
1486	return 0;
1487	#ifdef O_TEXT
1488	setmode(unit, O_TEXT);
1489	#endif
1490	unit = dmove(unit, -1);
1491
1492	(void) close_on_exec(unit, 1);
1493	srcunit(unit, onlyown, flag, av);
1494	return 1;
1495	}
1496
1497
1498	/*
1499	* Save the shell state, and establish new argument vector, and new input
1500	* fd.
1501	*/
1502	static void
1503	st_save(st, unit, hflg, al, av)
1504	struct saved_state *st;
1505	int unit, hflg;
1506	Char al, av;
1507	{
1508	st->insource = insource;
1509	st->SHIN = SHIN;
1510	/* Want to preserve the meaning of "source file >output".
1511	* Save old descriptors, move new 0,1,2 to safe places and assign
1512	* them to SH* and let process() redo 0,1,2 from them.
1513	*
1514	* The macro returns true if d1 and d2 are good and they point to
1515	* different things. If you don't avoid saving duplicate
1516	* descriptors, you really limit the depth of "source" recursion
1517	* you can do because of all the open file descriptors. -IAN!
1518	*/
1519	#define NEED_SAVE_FD(d1,d2) \
1520	(fstat(d1, &s1) != -1 && fstat(d2, &s2) != -1 \
1521	&& (s1.st_ino != s2.st_ino \|\| s1.st_dev != s2.st_dev) )
1522
1523	st->OLDSTD = st->SHOUT = st->SHDIAG = -1;/* test later to restore these */
1524	if (didfds) {
1525	struct stat s1, s2;
1526	if (NEED_SAVE_FD(0,OLDSTD)) {
1527	st->OLDSTD = OLDSTD;
1528	OLDSTD = dmove(0, -1);
1529	(void)close_on_exec(OLDSTD, 1);
1530	}
1531	if (NEED_SAVE_FD(1,SHOUT)) {
1532	st->SHOUT = SHOUT;
1533	SHOUT = dmove(1, -1);
1534	(void)close_on_exec(SHOUT, 1);
1535	}
1536	if (NEED_SAVE_FD(2,SHDIAG)) {
1537	st->SHDIAG = SHDIAG;
1538	SHDIAG = dmove(2, -1);
1539	(void)close_on_exec(SHDIAG, 1);
1540	}
1541	donefds();
1542	}
1543
1544	st->intty = intty;
1545	st->whyles = whyles;
1546	st->gointr = gointr;
1547	st->arginp = arginp;
1548	st->evalp = evalp;
1549	st->evalvec = evalvec;
1550	st->alvecp = alvecp;
1551	st->alvec = alvec;
1552	st->onelflg = onelflg;
1553	st->enterhist = enterhist;
1554	if (hflg)
1555	st->HIST = HIST;
1556	else
1557	st->HIST = '\0';
1558	st->cantell = cantell;
1559	cpybin(st->B, B);
1560
1561	/*
1562	* we can now pass arguments to source.
1563	* For compatibility we do that only if arguments were really
1564	* passed, otherwise we keep the old, global $argv like before.
1565	*/
1566	if (av != NULL && *av != NULL) {
1567	struct varent *vp;
1568	if ((vp = adrof(STRargv)) != NULL && vp->vec != NULL)
1569	st->argv = saveblk(vp->vec);
1570	else
1571	st->argv = NULL;
1572	setq(STRargv, saveblk(av), &shvhed, VAR_READWRITE);
1573	}
1574	else
1575	st->argv = NULL;
1576
1577	SHIN = unit; /* Do this first */
1578
1579	/* Establish new input arena */
1580	{
1581	fbuf = NULL;
1582	fseekp = feobp = fblocks = 0;
1583	settell();
1584	}
1585
1586	arginp = 0;
1587	onelflg = 0;
1588	intty = isatty(SHIN);
1589	whyles = 0;
1590	gointr = 0;
1591	evalvec = 0;
1592	evalp = 0;
1593	alvec = al;
1594	alvecp = 0;
1595	enterhist = hflg;
1596	if (enterhist)
1597	HIST = '\0';
1598	insource = 1;
1599	}
1600
1601
1602	/*
1603	* Restore the shell to a saved state
1604	*/
1605	static void
1606	st_restore(st, av)
1607	struct saved_state *st;
1608	Char **av;
1609	{
1610	if (st->SHIN == -1)
1611	return;
1612
1613	/* Reset input arena */
1614	{
1615	int i;
1616	Char** nfbuf = fbuf;
1617	int nfblocks = fblocks;
1618
1619	fblocks = 0;
1620	fbuf = NULL;
1621	for (i = 0; i < nfblocks; i++)
1622	xfree((ptr_t) nfbuf[i]);
1623	xfree((ptr_t) nfbuf);
1624	}
1625	cpybin(B, st->B);
1626
1627	(void) close(SHIN);
1628
1629	insource = st->insource;
1630	SHIN = st->SHIN;
1631	if (st->OLDSTD != -1)
1632	(void)close(OLDSTD), OLDSTD = st->OLDSTD;
1633	if (st->SHOUT != -1)
1634	(void)close(SHOUT), SHOUT = st->SHOUT;
1635	if (st->SHDIAG != -1)
1636	(void)close(SHDIAG), SHDIAG = st->SHDIAG;
1637	arginp = st->arginp;
1638	onelflg = st->onelflg;
1639	evalp = st->evalp;
1640	evalvec = st->evalvec;
1641	alvecp = st->alvecp;
1642	alvec = st->alvec;
1643	intty = st->intty;
1644	whyles = st->whyles;
1645	gointr = st->gointr;
1646	if (st->HIST != '\0')
1647	HIST = st->HIST;
1648	enterhist = st->enterhist;
1649	cantell = st->cantell;
1650
1651	if (st->argv != NULL)
1652	setq(STRargv, st->argv, &shvhed, VAR_READWRITE);
1653	else if (av != NULL && *av != NULL && adrof(STRargv) != NULL)
1654	unsetv(STRargv);
1655	}
1656
1657	/*
1658	* Source to a unit. If onlyown it must be our file or our group or
1659	* we don't chance it. This occurs on ".cshrc"s and the like.
1660	*/
1661	static void
1662	srcunit(unit, onlyown, hflg, av)
1663	int unit;
1664	int onlyown;
1665	int hflg;
1666	Char **av;
1667	{
1668	struct saved_state st;
1669	st.SHIN = -1; /* st_restore checks this */
1670
1671	if (unit < 0)
1672	return;
1673
1674	if (onlyown) {
1675	struct stat stb;
1676
1677	if (fstat(unit, &stb) < 0) {
1678	(void) close(unit);
1679	return;
1680	}
1681	}
1682
1683	getexit(st.oldexit);
1684
1685	if (setintr)
1686	#ifdef BSDSIGS
1687	st.mask = sigblock(sigmask(SIGINT));
1688	#else
1689	(void) sighold(SIGINT);
1690	#endif
1691
1692	/* Save the current state and move us to a new state */
1693	st_save(&st, unit, hflg, NULL, av);
1694
1695	/*
1696	* Now if we are allowing commands to be interrupted, we let ourselves be
1697	* interrupted.
1698	*/
1699	if (setintr)
1700	#ifdef BSDSIGS
1701	(void) sigsetmask(st.mask);
1702	#else
1703	(void) sigrelse(SIGINT);
1704	#endif
1705
1706	/*
1707	* Bugfix for running out of memory by: Jak Kirman
1708	* <jak%cs.brown.edu@RELAY.CS.NET>. Solution: pay attention to what
1709	* setexit() is returning because reenter _may_ be in a register, and
1710	* thus restored to 0 on a longjump(). (PWP: insert flames about
1711	* compiler-dependant code here) PWP: THANKS LOTS !!!
1712	*
1713	* PWP: think of this as like a LISP (unwind-protect ...)
1714	* thanks to Diana Smetters for pointing out how this _should_ be written
1715	*/
1716	#ifdef cray
1717	st.reenter = 1; /* assume non-zero return val */
1718	if (setexit() == 0) {
1719	st.reenter = 0; /* Oh well, we were wrong */
1720	#else
1721	if ((st.reenter = setexit()) == 0) {
1722	#endif
1723	process(0); /* 0 -> blow away on errors */
1724	}
1725
1726	if (setintr)
1727	#ifdef BSDSIGS
1728	(void) sigsetmask(st.mask);
1729	#else
1730	(void) sigrelse(SIGINT);
1731	#endif
1732
1733	/* Restore the old state */
1734	st_restore(&st, av);
1735	resexit(st.oldexit);
1736	/*
1737	* If process reset() (effectively an unwind) then we must also unwind.
1738	*/
1739	if (st.reenter)
1740	stderror(ERR_SILENT);
1741	}
1742
1743
1744	/ARGSUSED/
1745	void
1746	goodbye(v, c)
1747	Char **v;
1748	struct command *c;
1749	{
1750	USE(v);
1751	USE(c);
1752	record();
1753
1754	if (loginsh) {
1755	(void) sigset(SIGQUIT, SIG_IGN);
1756	(void) sigset(SIGINT, SIG_IGN);
1757	(void) sigset(SIGTERM, SIG_IGN);
1758	(void) sigset(SIGHUP, SIG_IGN);
1759	setintr = 0; /* No interrupts after "logout" */
1760	/* Trap errors inside .logout */
1761	reenter = setexit();
1762	if (reenter != 0)
1763	exitstat();
1764	if (!(adrof(STRlogout)))
1765	set(STRlogout, Strsave(STRnormal), VAR_READWRITE);
1766	#ifdef _PATH_DOTLOGOUT
1767	(void) srcfile(_PATH_DOTLOGOUT, 0, 0, NULL);
1768	#endif
1769	if (adrof(STRhome))
1770	(void) srccat(varval(STRhome), STRsldtlogout);
1771	#ifdef TESLA
1772	do_logout = 1;
1773	#endif /* TESLA */
1774	}
1775	exitstat();
1776	}
1777
1778	void
1779	exitstat()
1780	{
1781	#ifdef PROF
1782	monitor(0);
1783	#endif
1784	/*
1785	* Note that if STATUS is corrupted (i.e. getn bombs) then error will exit
1786	* directly because we poke child here. Otherwise we might continue
1787	* unwarrantedly (sic).
1788	*/
1789	child = 1;
1790
1791	xexit(getn(varval(STRstatus)));
1792	}
1793
1794	/*
1795	* in the event of a HUP we want to save the history
1796	*/
1797	static RETSIGTYPE
1798	phup(snum)
1799	int snum;
1800	{
1801	/*
1802	* There is no return from here,
1803	* so we are not going to release SIGHUP
1804	* anymore
1805	*/
1806	#ifdef UNRELSIGS
1807	if (snum)
1808	(void) sigset(snum, SIG_IGN);
1809	#else
1810	# ifdef BSDSIGS
1811	(void) sigblock(sigmask(SIGHUP));
1812	# else
1813	(void) sighold(SIGHUP);
1814	# endif /* BSDSIGS */
1815	#endif /* UNRELSIGS */
1816
1817	if (loginsh) {
1818	set(STRlogout, Strsave(STRhangup), VAR_READWRITE);
1819	#ifdef _PATH_DOTLOGOUT
1820	(void) srcfile(_PATH_DOTLOGOUT, 0, 0, NULL);
1821	#endif
1822	if (adrof(STRhome))
1823	(void) srccat(varval(STRhome), STRsldtlogout);
1824	}
1825
1826	record();
1827
1828	#ifdef POSIXJOBS
1829	/*
1830	* We kill the last foreground process group. It then becomes
1831	* responsible to propagate the SIGHUP to its progeny.
1832	*/
1833	{
1834	struct process pp, np;
1835
1836	for (pp = proclist.p_next; pp; pp = pp->p_next) {
1837	np = pp;
1838	/*
1839	* Find if this job is in the foreground. It could be that
1840	* the process leader has exited and the foreground flag
1841	* is cleared for it.
1842	*/
1843	do
1844	/*
1845	* If a process is in the foreground we try to kill
1846	* it's process group. If we succeed, then the
1847	* whole job is gone. Otherwise we keep going...
1848	* But avoid sending HUP to the shell again.
1849	*/
1850	if (((np->p_flags & PFOREGND) != 0) && np->p_jobid != shpgrp) {
1851	np->p_flags &= ~PHUP;
1852	if (killpg(np->p_jobid, SIGHUP) != -1) {
1853	/* In case the job was suspended... */
1854	#ifdef SIGCONT
1855	(void) killpg(np->p_jobid, SIGCONT);
1856	#endif
1857	break;
1858	}
1859	}
1860	while ((np = np->p_friends) != pp);
1861	}
1862	}
1863	#endif /* POSIXJOBS */
1864
1865	xexit(snum);
1866	}
1867
1868	static Char *jobargv[2] = {STRjobs, 0};
1869
1870	/*
1871	* Catch an interrupt, e.g. during lexical input.
1872	* If we are an interactive shell, we reset the interrupt catch
1873	* immediately. In any case we drain the shell output,
1874	* and finally go through the normal error mechanism, which
1875	* gets a chance to make the shell go away.
1876	*/
1877	int just_signaled; /* bugfix by Michael Bloom (mg@ttidca.TTI.COM) */
1878
1879	RETSIGTYPE
1880	pintr(snum)
1881	int snum;
1882	{
1883	USE(snum);
1884	#ifdef UNRELSIGS
1885	if (snum)
1886	(void) sigset(snum, pintr);
1887	#endif /* UNRELSIGS */
1888	just_signaled = 1;
1889	pintr1(1);
1890	}
1891
1892	void
1893	pintr1(wantnl)
1894	int wantnl;
1895	{
1896	Char **v;
1897	#ifdef BSDSIGS
1898	sigmask_t omask;
1899	#endif
1900
1901	#ifdef BSDSIGS
1902	omask = sigblock((sigmask_t) 0);
1903	#endif
1904	if (setintr) {
1905	#ifdef BSDSIGS
1906	(void) sigsetmask(omask & ~sigmask(SIGINT));
1907	#else
1908	(void) sigrelse(SIGINT);
1909	#endif
1910	if (pjobs) {
1911	pjobs = 0;
1912	xputchar('\n');
1913	dojobs(jobargv, NULL);
1914	stderror(ERR_NAME \| ERR_INTR);
1915	}
1916	}
1917	/* MH - handle interrupted completions specially */
1918	{
1919	if (InsideCompletion)
1920	stderror(ERR_SILENT);
1921	}
1922	/* JV - Make sure we shut off inputl */
1923	{
1924	(void) Cookedmode();
1925	GettingInput = 0;
1926	}
1927	#ifdef BSDSIGS
1928	(void) sigsetmask(omask & ~sigmask(SIGCHLD));
1929	#else
1930	if (setintr)
1931	(void) sighold(SIGINT);
1932	(void) sigrelse(SIGCHLD);
1933	#endif
1934	drainoline();
1935	#ifdef HAVE_GETPWENT
1936	(void) endpwent();
1937	#endif
1938
1939	/*
1940	* If we have an active "onintr" then we search for the label. Note that if
1941	* one does "onintr -" then we shan't be interruptible so we needn't worry
1942	* about that here.
1943	*/
1944	if (gointr) {
1945	gotolab(gointr);
1946	timflg = 0;
1947	if ((v = pargv) != 0)
1948	pargv = 0, blkfree(v);
1949	if ((v = gargv) != 0)
1950	gargv = 0, blkfree(v);
1951	reset();
1952	}
1953	else if (intty && wantnl) {
1954	if (editing) {
1955	/*
1956	* If we are editing a multi-line input command, and move to
1957	* the beginning of the line, we don't want to trash it when
1958	* we hit ^C
1959	*/
1960	PastBottom();
1961	ClearLines();
1962	ClearDisp();
1963	}
1964	else {
1965	/* xputchar('\n'); // Some like this, others don't */
1966	(void) putraw('\r');
1967	(void) putraw('\n');
1968	}
1969	}
1970	stderror(ERR_SILENT);
1971	}
1972
1973	/*
1974	* Process is the main driving routine for the shell.
1975	* It runs all command processing, except for those within { ... }
1976	* in expressions (which is run by a routine evalav in sh.exp.c which
1977	* is a stripped down process), and `...` evaluation which is run
1978	* also by a subset of this code in sh.glob.c in the routine backeval.
1979	*
1980	* The code here is a little strange because part of it is interruptible
1981	* and hence freeing of structures appears to occur when none is necessary
1982	* if this is ignored.
1983	*
1984	* Note that if catch is not set then we will unwind on any error.
1985	* If an end-of-file occurs, we return.
1986	*/
1987	static struct command *savet = NULL;
1988	void
1989	process(catch)
1990	int catch;
1991	{
1992	jmp_buf_t osetexit;
1993	/* PWP: This might get nuked my longjmp so don't make it a register var */
1994	struct command *t = savet;
1995
1996	savet = NULL;
1997	getexit(osetexit);
1998	for (;;) {
1999
2000	pendjob();
2001
2002	/* This was leaking memory badly, particularly when sourcing
2003	* files, etc.. For whatever reason we were arriving here with
2004	* allocated pointers still active, and the code was simply
2005	* overwriting them. I can't say I fully understand the
2006	* control flow here, but according to Purify this particular
2007	* leak has been plugged, and I haven't noticed any ill
2008	* effects.. (sg)
2009	*/
2010	if (paraml.next && paraml.next != &paraml)
2011	freelex(&paraml);
2012
2013	paraml.next = paraml.prev = &paraml;
2014	paraml.word = STRNULL;
2015	(void) setexit();
2016	justpr = enterhist; /* execute if not entering history */
2017
2018	/*
2019	* Interruptible during interactive reads
2020	*/
2021	if (setintr)
2022	#ifdef BSDSIGS
2023	(void) sigsetmask(sigblock((sigmask_t) 0) & ~sigmask(SIGINT));
2024	#else
2025	(void) sigrelse(SIGINT);
2026	#endif
2027
2028
2029	/*
2030	* For the sake of reset()
2031	*/
2032	freelex(&paraml);
2033	if (savet)
2034	freesyn(savet), savet = NULL;
2035
2036	if (haderr) {
2037	if (!catch) {
2038	/* unwind */
2039	doneinp = 0;
2040	savet = t;
2041	resexit(osetexit);
2042	reset();
2043	}
2044	haderr = 0;
2045	/*
2046	* Every error is eventually caught here or the shell dies. It is
2047	* at this point that we clean up any left-over open files, by
2048	* closing all but a fixed number of pre-defined files. Thus
2049	* routines don't have to worry about leaving files open due to
2050	* deeper errors... they will get closed here.
2051	*/
2052	closem();
2053	continue;
2054	}
2055	if (doneinp) {
2056	doneinp = 0;
2057	break;
2058	}
2059	if (chkstop)
2060	chkstop--;
2061	if (neednote)
2062	pnote();
2063	if (intty && prompt && evalvec == 0) {
2064	just_signaled = 0;
2065	mailchk();
2066	/*
2067	* Watch for logins/logouts. Next is scheduled commands stored
2068	* previously using "sched." Then execute periodic commands.
2069	* Following that, the prompt precmd is run.
2070	*/
2071	#ifndef HAVENOUTMP
2072	watch_login(0);
2073	#endif /* !HAVENOUTMP */
2074	sched_run(0);
2075	period_cmd();
2076	precmd();
2077	/*
2078	* If we are at the end of the input buffer then we are going to
2079	* read fresh stuff. Otherwise, we are rereading input and don't
2080	* need or want to prompt.
2081	*/
2082	if (fseekp == feobp && aret == TCSH_F_SEEK)
2083	printprompt(0, NULL);
2084	flush();
2085	setalarm(1);
2086	}
2087	if (seterr) {
2088	xfree((ptr_t) seterr);
2089	seterr = NULL;
2090	}
2091
2092	/*
2093	* Echo not only on VERBOSE, but also with history expansion. If there
2094	* is a lexical error then we forego history echo.
2095	*/
2096	if ((lex(&paraml) && !seterr && intty && !tellwhat && !Expand &&
2097	!whyles) \|\| adrof(STRverbose)) {
2098	int odidfds = didfds;
2099	haderr = 1;
2100	didfds = 0;
2101	prlex(&paraml);
2102	flush();
2103	haderr = 0;
2104	didfds = odidfds;
2105	}
2106	(void) alarm(0); /* Autologout OFF */
2107
2108	/*
2109	* The parser may lose space if interrupted.
2110	*/
2111	if (setintr)
2112	#ifdef BSDSIGS
2113	(void) sigblock(sigmask(SIGINT));
2114	#else
2115	(void) sighold(SIGINT);
2116	#endif
2117
2118	/*
2119	* Save input text on the history list if reading in old history, or it
2120	* is from the terminal at the top level and not in a loop.
2121	*
2122	* PWP: entry of items in the history list while in a while loop is done
2123	* elsewhere...
2124	*/
2125	if (enterhist \|\| (catch && intty && !whyles && !tellwhat && !arun))
2126	savehist(&paraml, enterhist > 1);
2127
2128	if (Expand && seterr)
2129	Expand = 0;
2130
2131	/*
2132	* Print lexical error messages, except when sourcing history lists.
2133	*/
2134	if (!enterhist && seterr)
2135	stderror(ERR_OLD);
2136
2137	/*
2138	* If had a history command :p modifier then this is as far as we
2139	* should go
2140	*/
2141	if (justpr)
2142	reset();
2143
2144	/*
2145	* If had a tellwhat from twenex() then do
2146	*/
2147	if (tellwhat) {
2148	(void) tellmewhat(&paraml, NULL);
2149	reset();
2150	}
2151
2152	alias(&paraml);
2153
2154	#ifdef BSDJOBS
2155	/*
2156	* If we are interactive, try to continue jobs that we have stopped
2157	*/
2158	if (prompt)
2159	continue_jobs(&paraml);
2160	#endif /* BSDJOBS */
2161
2162	/*
2163	* Check to see if the user typed "rm * .o" or something
2164	*/
2165	if (prompt)
2166	rmstar(&paraml);
2167	/*
2168	* Parse the words of the input into a parse tree.
2169	*/
2170	savet = syntax(paraml.next, &paraml, 0);
2171	if (seterr)
2172	stderror(ERR_OLD);
2173
2174	postcmd();
2175	/*
2176	* Execute the parse tree From: Michael Schroeder
2177	* <mlschroe@immd4.informatik.uni-erlangen.de> was execute(t, tpgrp);
2178	*/
2179	execute(savet, (tpgrp > 0 ? tpgrp : -1), NULL, NULL, TRUE);
2180
2181	/*
2182	* Made it!
2183	*/
2184	freelex(&paraml);
2185	freesyn(savet), savet = NULL;
2186	#ifdef SIG_WINDOW
2187	if (windowchg \|\| (catch && intty && !whyles && !tellwhat)) {
2188	(void) check_window_size(0); /* for window systems */
2189	}
2190	#endif /* SIG_WINDOW */
2191	set(STR_, Strsave(InputBuf), VAR_READWRITE \| VAR_NOGLOB);
2192	}
2193	savet = t;
2194	resexit(osetexit);
2195	}
2196
2197	/ARGSUSED/
2198	void
2199	dosource(t, c)
2200	Char **t;
2201	struct command *c;
2202	{
2203	Char *f;
2204	int hflg = 0;
2205	char buf[BUFSIZE];
2206
2207	USE(c);
2208	t++;
2209	if (t && eq(t, STRmh)) {
2210	if (*++t == NULL)
2211	stderror(ERR_NAME \| ERR_HFLAG);
2212	hflg++;
2213	}
2214	else if (t && eq(t, STRmm)) {
2215	if (*++t == NULL)
2216	stderror(ERR_NAME \| ERR_MFLAG);
2217	hflg = 2;
2218	}
2219
2220	f = globone(*t++, G_ERROR);
2221	(void) strcpy(buf, short2str(f));
2222	xfree((ptr_t) f);
2223	gflag = 0, tglob(t);
2224	if (gflag) {
2225	t = globall(t);
2226	if (t == 0)
2227	stderror(ERR_NAME \| ERR_NOMATCH);
2228	} else {
2229	t = saveblk(t);
2230	trim(t);
2231	}
2232	if ((!srcfile(buf, 0, hflg, t)) && (!hflg) && (!bequiet))
2233	stderror(ERR_SYSTEM, buf, strerror(errno));
2234	}
2235
2236	/*
2237	* Check for mail.
2238	* If we are a login shell, then we don't want to tell
2239	* about any mail file unless its been modified
2240	* after the time we started.
2241	* This prevents us from telling the user things he already
2242	* knows, since the login program insists on saying
2243	* "You have mail."
2244	*/
2245
2246	/*
2247	* The AMS version.
2248	* This version checks if the file is a directory, and if so,
2249	* tells you the number of files in it, otherwise do the old thang.
2250	* The magic "+1" in the time calculation is to compensate for
2251	* an AFS bug where directory mtimes are set to 1 second in
2252	* the future.
2253	*/
2254
2255	static void
2256	mailchk()
2257	{
2258	struct varent *v;
2259	Char **vp;
2260	time_t t;
2261	int intvl, cnt;
2262	struct stat stb;
2263	int new;
2264
2265	v = adrof(STRmail);
2266	if (v == NULL \|\| v->vec == NULL)
2267	return;
2268	(void) time(&t);
2269	vp = v->vec;
2270	cnt = blklen(vp);
2271	intvl = (cnt && number(vp)) ? (--cnt, getn(vp++)) : MAILINTVL;
2272	if (intvl < 1)
2273	intvl = 1;
2274	if (chktim + intvl > t)
2275	return;
2276	for (; *vp; vp++) {
2277	char filename = short2str(vp);
2278	char *mboxdir = filename;
2279
2280	if (stat(filename, &stb) < 0)
2281	continue;
2282	#if defined(BSDTIMES) \|\| defined(_SEQUENT_)
2283	new = stb.st_mtime > time0.tv_sec;
2284	#else
2285	new = stb.st_mtime > seconds0;
2286	#endif
2287	if (S_ISDIR(stb.st_mode)) {
2288	DIR *mailbox;
2289	int mailcount = 0;
2290	char tempfilename[MAXPATHLEN];
2291	struct stat stc;
2292
2293	xsnprintf(tempfilename, MAXPATHLEN, "%s/new", filename);
2294
2295	if (stat(tempfilename, &stc) != -1 && S_ISDIR(stc.st_mode)) {
2296	/*
2297	* "filename/new" exists and is a directory; you are
2298	* using Qmail.
2299	*/
2300	stb = stc;
2301	#if defined(BSDTIMES) \|\| defined(_SEQUENT_)
2302	new = stb.st_mtime > time0.tv_sec;
2303	#else
2304	new = stb.st_mtime > seconds0;
2305	#endif
2306	mboxdir = tempfilename;
2307	}
2308
2309	if (stb.st_mtime <= chktim + 1 \|\| (loginsh && !new))
2310	continue;
2311
2312	if ((mailbox = opendir(mboxdir)) == NULL)
2313	continue;
2314
2315	/* skip . and .. */
2316	if (!readdir(mailbox) \|\| !readdir(mailbox))
2317	continue;
2318
2319	while (readdir(mailbox))
2320	mailcount++;
2321
2322	if (mailcount == 0)
2323	continue;
2324
2325	if (cnt == 1)
2326	xprintf(CGETS(11, 3, "You have %d mail messages.\n"),
2327	mailcount);
2328	else
2329	xprintf(CGETS(11, 4, "You have %d mail messages in %s.\n"),
2330	mailcount, filename);
2331	}
2332	else {
2333	char *type;
2334
2335	if (stb.st_size == 0 \|\| stb.st_atime > stb.st_mtime \|\|
2336	(stb.st_atime <= chktim && stb.st_mtime <= chktim) \|\|
2337	(loginsh && !new))
2338	continue;
2339	type = strsave(new ? CGETS(11, 6, "new ") : "");
2340	if (cnt == 1)
2341	xprintf(CGETS(11, 5, "You have %smail.\n"), type);
2342	else
2343	xprintf(CGETS(11, 7, "You have %smail in %s.\n"), type, filename);
2344	xfree(type);
2345	}
2346	}
2347	chktim = t;
2348	}
2349
2350	/*
2351	* Extract a home directory from the password file
2352	* The argument points to a buffer where the name of the
2353	* user whose home directory is sought is currently.
2354	* We write the home directory of the user back there.
2355	*/
2356	int
2357	gethdir(home)
2358	Char *home;
2359	{
2360	Char *h;
2361
2362	/*
2363	* Is it us?
2364	*/
2365	if (*home == '\0') {
2366	if ((h = varval(STRhome)) != STRNULL) {
2367	(void) Strcpy(home, h);
2368	return 0;
2369	}
2370	else
2371	return 1;
2372	}
2373
2374	/*
2375	* Look in the cache
2376	*/
2377	if ((h = gettilde(home)) == NULL)
2378	return 1;
2379	else {
2380	(void) Strcpy(home, h);
2381	return 0;
2382	}
2383	}
2384
2385	/*
2386	* Move the initial descriptors to their eventual
2387	* resting places, closing all other units.
2388	*/
2389	void
2390	initdesc()
2391	{
2392	#ifdef NLS_BUGS
2393	#ifdef NLS_CATALOGS
2394	nlsclose();
2395	#endif /* NLS_CATALOGS */
2396	#endif /* NLS_BUGS */
2397
2398
2399	didfds = 0; /* 0, 1, 2 aren't set up */
2400	(void) close_on_exec(SHIN = dcopy(0, FSHIN), 1);
2401	(void) close_on_exec(SHOUT = dcopy(1, FSHOUT), 1);
2402	(void) close_on_exec(SHDIAG = dcopy(2, FSHDIAG), 1);
2403	(void) close_on_exec(OLDSTD = dcopy(SHIN, FOLDSTD), 1);
2404	#ifndef CLOSE_ON_EXEC
2405	didcch = 0; /* Havent closed for child */
2406	#endif /* CLOSE_ON_EXEC */
2407	isdiagatty = isatty(SHDIAG);
2408	isoutatty = isatty(SHOUT);
2409	#ifdef NLS_BUGS
2410	#ifdef NLS_CATALOGS
2411	nlsinit();
2412	#endif /* NLS_CATALOGS */
2413	#endif /* NLS_BUGS */
2414	}
2415
2416
2417	void
2418	#ifdef PROF
2419	done(i)
2420	#else
2421	xexit(i)
2422	#endif
2423	int i;
2424	{
2425	#ifdef TESLA
2426	if (loginsh && do_logout) {
2427	/* this is to send hangup signal to the develcon */
2428	/* we toggle DTR. clear dtr - sleep 1 - set dtr */
2429	/* ioctl will return ENOTTY for pty's but we ignore it */
2430	/* exitstat will run after disconnect */
2431	/* we sleep for 2 seconds to let things happen in */
2432	/* .logout and rechist() */
2433	#ifdef TIOCCDTR
2434	(void) sleep(2);
2435	(void) ioctl(FSHTTY, TIOCCDTR, NULL);
2436	(void) sleep(1);
2437	(void) ioctl(FSHTTY, TIOCSDTR, NULL);
2438	#endif /* TIOCCDTR */
2439	}
2440	#endif /* TESLA */
2441
2442	{
2443	struct process pp, np;
2444
2445	/* Kill all processes marked for hup'ing */
2446	for (pp = proclist.p_next; pp; pp = pp->p_next) {
2447	np = pp;
2448	do
2449	if ((np->p_flags & PHUP) && np->p_jobid != shpgrp) {
2450	if (killpg(np->p_jobid, SIGHUP) != -1) {
2451	/* In case the job was suspended... */
2452	#ifdef SIGCONT
2453	(void) killpg(np->p_jobid, SIGCONT);
2454	#endif
2455	break;
2456	}
2457	}
2458	while ((np = np->p_friends) != pp);
2459	}
2460	}
2461	untty();
2462	#ifdef NLS_CATALOGS
2463	/*
2464	* We need to call catclose, because SVR4 leaves symlinks behind otherwise
2465	* in the catalog directories. We cannot close on a vforked() child,
2466	* because messages will stop working on the parent too.
2467	*/
2468	if (child == 0)
2469	nlsclose();
2470	#endif /* NLS_CATALOGS */
2471	#ifdef WINNT_NATIVE
2472	nt_cleanup();
2473	#endif /* WINNT_NATIVE */
2474	_exit(i);
2475	}
2476
2477	#ifndef _PATH_DEFPATH
2478	static Char **
2479	defaultpath()
2480	{
2481	char *ptr;
2482	Char blk, blkp;
2483	struct stat stb;
2484
2485	blkp = blk = (Char *) xmalloc((size_t) sizeof(Char ) * 10);
2486
2487	#ifndef NODOT
2488	# ifndef DOTLAST
2489	*blkp++ = Strsave(STRdot);
2490	# endif
2491	#endif
2492
2493	#define DIRAPPEND(a) \
2494	if (stat(ptr = a, &stb) == 0 && S_ISDIR(stb.st_mode)) \
2495	*blkp++ = SAVE(ptr)
2496
2497	#ifdef _PATH_LOCAL
2498	DIRAPPEND(_PATH_LOCAL);
2499	#endif
2500
2501	#ifdef _PATH_USRUCB
2502	DIRAPPEND(_PATH_USRUCB);
2503	#endif
2504
2505	#ifdef _PATH_USRBSD
2506	DIRAPPEND(_PATH_USRBSD);
2507	#endif
2508
2509	#ifdef _PATH_BIN
2510	DIRAPPEND(_PATH_BIN);
2511	#endif
2512
2513	#ifdef _PATH_USRBIN
2514	DIRAPPEND(_PATH_USRBIN);
2515	#endif
2516
2517	#undef DIRAPPEND
2518
2519	#ifndef NODOT
2520	# ifdef DOTLAST
2521	*blkp++ = Strsave(STRdot);
2522	# endif
2523	#endif
2524	*blkp = NULL;
2525	return (blk);
2526	}
2527	#endif
2528
2529	static void
2530	record()
2531	{
2532	if (!fast) {
2533	recdirs(NULL, adrof(STRsavedirs) != NULL);
2534	rechist(NULL, adrof(STRsavehist) != NULL);
2535	}
2536	}

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source: trunk/third/tcsh/sh.c @ 22039

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