1 /* $Header: /src/pub/tcsh/sh.c,v 3.123 2005/03/21 21:26:36 kim 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 3.123 2005/03/21 21:26:36 kim 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 /* upward compat. */ 1319 if (!srccat(varval(STRhome), STRsldottcshrc)) 1320 (void) srccat(varval(STRhome), STRsldotcshrc); 1321 1322 if (!fast && !arginp && !onelflg && !havhash) 1323 dohash(NULL,NULL); 1324 1325 /* 1326 * Source history before .login so that it is available in .login 1327 */ 1328 loadhist(NULL, 0); 1329 #ifndef LOGINFIRST 1330 if (loginsh) 1331 (void) srccat(varval(STRhome), STRsldotlogin); 1332 #endif 1333 if (!fast && (loginsh || rdirs)) 1334 loaddirs(NULL); 1335 } 1336 /* Reset interrupt flag */ 1337 setintr = osetintr; 1338 parintr = oparintr; 1339 1340 /* Initing AFTER .cshrc is the Right Way */ 1341 if (intty && !arginp) { /* PWP setup stuff */ 1342 ed_Init(); /* init the new line editor */ 1343 #ifdef SIG_WINDOW 1344 check_window_size(1); /* mung environment */ 1345 #endif /* SIG_WINDOW */ 1346 } 1347 1348 /* 1349 * Now are ready for the -v and -x flags 1350 */ 1351 if (nverbose) 1352 setNS(STRverbose); 1353 if (nexececho) 1354 setNS(STRecho); 1355 1356 /* 1357 * All the rest of the world is inside this call. The argument to process 1358 * indicates whether it should catch "error unwinds". Thus if we are a 1359 * interactive shell our call here will never return by being blown past on 1360 * an error. 1361 */ 1362 process(setintr); 1363 1364 /* 1365 * Mop-up. 1366 */ 1367 if (intty) { 1368 if (loginsh) { 1369 xprintf("logout\n"); 1370 (void) close(SHIN); 1371 child = 1; 1372 #ifdef TESLA 1373 do_logout = 1; 1374 #endif /* TESLA */ 1375 goodbye(NULL, NULL); 1376 } 1377 else { 1378 xprintf("exit\n"); 1379 } 1380 } 1381 record(); 1382 exitstat(); 1383 return (0); 1384 } 1385 1386 void 1387 untty() 1388 { 1389 #ifdef BSDJOBS 1390 if (tpgrp > 0 && opgrp != shpgrp) { 1391 (void) setpgid(0, opgrp); 1392 (void) tcsetpgrp(FSHTTY, opgrp); 1393 (void) resetdisc(FSHTTY); 1394 } 1395 #endif /* BSDJOBS */ 1396 } 1397 1398 void 1399 importpath(cp) 1400 Char *cp; 1401 { 1402 int i = 0; 1403 Char *dp; 1404 Char **pv; 1405 int c; 1406 1407 for (dp = cp; *dp; dp++) 1408 if (*dp == PATHSEP) 1409 i++; 1410 /* 1411 * i+2 where i is the number of colons in the path. There are i+1 1412 * directories in the path plus we need room for a zero terminator. 1413 */ 1414 pv = (Char **) xcalloc((size_t) (i + 2), sizeof(Char *)); 1415 dp = cp; 1416 i = 0; 1417 if (*dp) 1418 for (;;) { 1419 if ((c = *dp) == PATHSEP || c == 0) { 1420 *dp = 0; 1421 pv[i++] = Strsave(*cp ? cp : STRdot); 1422 if (c) { 1423 cp = dp + 1; 1424 *dp = PATHSEP; 1425 } 1426 else 1427 break; 1428 } 1429 #ifdef WINNT_NATIVE 1430 else if (*dp == '\\') 1431 *dp = '/'; 1432 #endif /* WINNT_NATIVE */ 1433 dp++; 1434 } 1435 pv[i] = 0; 1436 setq(STRpath, pv, &shvhed, VAR_READWRITE); 1437 } 1438 1439 /* 1440 * Source to the file which is the catenation of the argument names. 1441 */ 1442 static int 1443 srccat(cp, dp) 1444 Char *cp, *dp; 1445 { 1446 if (cp[0] == '/' && cp[1] == '\0') 1447 return srcfile(short2str(dp), (mflag ? 0 : 1), 0, NULL); 1448 else { 1449 Char *ep; 1450 char *ptr; 1451 int rv; 1452 1453 #ifdef WINNT_NATIVE 1454 ep = cp; 1455 while(*ep) 1456 ep++; 1457 if (ep[-1] == '/' && dp[0] == '/') /* silly win95 */ 1458 dp++; 1459 #endif /* WINNT_NATIVE */ 1460 1461 ep = Strspl(cp, dp); 1462 ptr = short2str(ep); 1463 1464 rv = srcfile(ptr, (mflag ? 0 : 1), 0, NULL); 1465 xfree((ptr_t) ep); 1466 return rv; 1467 } 1468 } 1469 1470 /* 1471 * Source to a file putting the file descriptor in a safe place (> 2). 1472 */ 1473 #ifndef WINNT_NATIVE 1474 static int 1475 #else 1476 int 1477 #endif /*WINNT_NATIVE*/ 1478 srcfile(f, onlyown, flag, av) 1479 const char *f; 1480 int onlyown; 1481 int flag; 1482 Char **av; 1483 { 1484 int unit; 1485 1486 if ((unit = open(f, O_RDONLY|O_LARGEFILE)) == -1) 1487 return 0; 1488 #ifdef O_TEXT 1489 setmode(unit, O_TEXT); 1490 #endif 1491 unit = dmove(unit, -1); 1492 1493 (void) close_on_exec(unit, 1); 1494 srcunit(unit, onlyown, flag, av); 1495 return 1; 1496 } 1497 1498 1499 /* 1500 * Save the shell state, and establish new argument vector, and new input 1501 * fd. 1502 */ 1503 static void 1504 st_save(st, unit, hflg, al, av) 1505 struct saved_state *st; 1506 int unit, hflg; 1507 Char **al, **av; 1508 { 1509 st->insource = insource; 1510 st->SHIN = SHIN; 1511 /* Want to preserve the meaning of "source file >output". 1512 * Save old descriptors, move new 0,1,2 to safe places and assign 1513 * them to SH* and let process() redo 0,1,2 from them. 1514 * 1515 * The macro returns true if d1 and d2 are good and they point to 1516 * different things. If you don't avoid saving duplicate 1517 * descriptors, you really limit the depth of "source" recursion 1518 * you can do because of all the open file descriptors. -IAN! 1519 */ 1520 #define NEED_SAVE_FD(d1,d2) \ 1521 (fstat(d1, &s1) != -1 && fstat(d2, &s2) != -1 \ 1522 && (s1.st_ino != s2.st_ino || s1.st_dev != s2.st_dev) ) 1523 1524 st->OLDSTD = st->SHOUT = st->SHDIAG = -1;/* test later to restore these */ 1525 if (didfds) { 1526 struct stat s1, s2; 1527 if (NEED_SAVE_FD(0,OLDSTD)) { 1528 st->OLDSTD = OLDSTD; 1529 OLDSTD = dmove(0, -1); 1530 (void)close_on_exec(OLDSTD, 1); 1531 } 1532 if (NEED_SAVE_FD(1,SHOUT)) { 1533 st->SHOUT = SHOUT; 1534 SHOUT = dmove(1, -1); 1535 (void)close_on_exec(SHOUT, 1); 1536 } 1537 if (NEED_SAVE_FD(2,SHDIAG)) { 1538 st->SHDIAG = SHDIAG; 1539 SHDIAG = dmove(2, -1); 1540 (void)close_on_exec(SHDIAG, 1); 1541 } 1542 donefds(); 1543 } 1544 1545 st->intty = intty; 1546 st->whyles = whyles; 1547 st->gointr = gointr; 1548 st->arginp = arginp; 1549 st->evalp = evalp; 1550 st->evalvec = evalvec; 1551 st->alvecp = alvecp; 1552 st->alvec = alvec; 1553 st->onelflg = onelflg; 1554 st->enterhist = enterhist; 1555 if (hflg) 1556 st->HIST = HIST; 1557 else 1558 st->HIST = '\0'; 1559 st->cantell = cantell; 1560 cpybin(st->B, B); 1561 1562 /* 1563 * we can now pass arguments to source. 1564 * For compatibility we do that only if arguments were really 1565 * passed, otherwise we keep the old, global $argv like before. 1566 */ 1567 if (av != NULL && *av != NULL) { 1568 struct varent *vp; 1569 if ((vp = adrof(STRargv)) != NULL && vp->vec != NULL) 1570 st->argv = saveblk(vp->vec); 1571 else 1572 st->argv = NULL; 1573 setq(STRargv, saveblk(av), &shvhed, VAR_READWRITE); 1574 } 1575 else 1576 st->argv = NULL; 1577 1578 SHIN = unit; /* Do this first */ 1579 1580 /* Establish new input arena */ 1581 { 1582 fbuf = NULL; 1583 fseekp = feobp = fblocks = 0; 1584 settell(); 1585 } 1586 1587 arginp = 0; 1588 onelflg = 0; 1589 intty = isatty(SHIN); 1590 whyles = 0; 1591 gointr = 0; 1592 evalvec = 0; 1593 evalp = 0; 1594 alvec = al; 1595 alvecp = 0; 1596 enterhist = hflg; 1597 if (enterhist) 1598 HIST = '\0'; 1599 insource = 1; 1600 } 1601 1602 1603 /* 1604 * Restore the shell to a saved state 1605 */ 1606 static void 1607 st_restore(st, av) 1608 struct saved_state *st; 1609 Char **av; 1610 { 1611 if (st->SHIN == -1) 1612 return; 1613 1614 /* Reset input arena */ 1615 { 1616 int i; 1617 Char** nfbuf = fbuf; 1618 int nfblocks = fblocks; 1619 1620 fblocks = 0; 1621 fbuf = NULL; 1622 for (i = 0; i < nfblocks; i++) 1623 xfree((ptr_t) nfbuf[i]); 1624 xfree((ptr_t) nfbuf); 1625 } 1626 cpybin(B, st->B); 1627 1628 (void) close(SHIN); 1629 1630 insource = st->insource; 1631 SHIN = st->SHIN; 1632 if (st->OLDSTD != -1) 1633 (void)close(OLDSTD), OLDSTD = st->OLDSTD; 1634 if (st->SHOUT != -1) 1635 (void)close(SHOUT), SHOUT = st->SHOUT; 1636 if (st->SHDIAG != -1) 1637 (void)close(SHDIAG), SHDIAG = st->SHDIAG; 1638 arginp = st->arginp; 1639 onelflg = st->onelflg; 1640 evalp = st->evalp; 1641 evalvec = st->evalvec; 1642 alvecp = st->alvecp; 1643 alvec = st->alvec; 1644 intty = st->intty; 1645 whyles = st->whyles; 1646 gointr = st->gointr; 1647 if (st->HIST != '\0') 1648 HIST = st->HIST; 1649 enterhist = st->enterhist; 1650 cantell = st->cantell; 1651 1652 if (st->argv != NULL) 1653 setq(STRargv, st->argv, &shvhed, VAR_READWRITE); 1654 else if (av != NULL && *av != NULL && adrof(STRargv) != NULL) 1655 unsetv(STRargv); 1656 } 1657 1658 /* 1659 * Source to a unit. If onlyown it must be our file or our group or 1660 * we don't chance it. This occurs on ".cshrc"s and the like. 1661 */ 1662 static void 1663 srcunit(unit, onlyown, hflg, av) 1664 int unit; 1665 int onlyown; 1666 int hflg; 1667 Char **av; 1668 { 1669 struct saved_state st; 1670 st.SHIN = -1; /* st_restore checks this */ 1671 1672 if (unit < 0) 1673 return; 1674 1675 if (onlyown) { 1676 struct stat stb; 1677 1678 if (fstat(unit, &stb) < 0) { 1679 (void) close(unit); 1680 return; 1681 } 1682 } 1683 1684 getexit(st.oldexit); 1685 1686 if (setintr) 1687 #ifdef BSDSIGS 1688 st.mask = sigblock(sigmask(SIGINT)); 1689 #else 1690 (void) sighold(SIGINT); 1691 #endif 1692 1693 /* Save the current state and move us to a new state */ 1694 st_save(&st, unit, hflg, NULL, av); 1695 1696 /* 1697 * Now if we are allowing commands to be interrupted, we let ourselves be 1698 * interrupted. 1699 */ 1700 if (setintr) 1701 #ifdef BSDSIGS 1702 (void) sigsetmask(st.mask); 1703 #else 1704 (void) sigrelse(SIGINT); 1705 #endif 1706 1707 /* 1708 * Bugfix for running out of memory by: Jak Kirman 1709 * <jak%cs.brown.edu@RELAY.CS.NET>. Solution: pay attention to what 1710 * setexit() is returning because reenter _may_ be in a register, and 1711 * thus restored to 0 on a longjump(). (PWP: insert flames about 1712 * compiler-dependant code here) PWP: THANKS LOTS !!! 1713 * 1714 * PWP: think of this as like a LISP (unwind-protect ...) 1715 * thanks to Diana Smetters for pointing out how this _should_ be written 1716 */ 1717 #ifdef cray 1718 st.reenter = 1; /* assume non-zero return val */ 1719 if (setexit() == 0) { 1720 st.reenter = 0; /* Oh well, we were wrong */ 1721 #else 1722 if ((st.reenter = setexit()) == 0) { 1723 #endif 1724 process(0); /* 0 -> blow away on errors */ 1725 } 1726 1727 if (setintr) 1728 #ifdef BSDSIGS 1729 (void) sigsetmask(st.mask); 1730 #else 1731 (void) sigrelse(SIGINT); 1732 #endif 1733 1734 /* Restore the old state */ 1735 st_restore(&st, av); 1736 resexit(st.oldexit); 1737 /* 1738 * If process reset() (effectively an unwind) then we must also unwind. 1739 */ 1740 if (st.reenter) 1741 stderror(ERR_SILENT); 1742 } 1743 1744 1745 /*ARGSUSED*/ 1746 void 1747 goodbye(v, c) 1748 Char **v; 1749 struct command *c; 1750 { 1751 USE(v); 1752 USE(c); 1753 record(); 1754 1755 if (loginsh) { 1756 (void) sigset(SIGQUIT, SIG_IGN); 1757 (void) sigset(SIGINT, SIG_IGN); 1758 (void) sigset(SIGTERM, SIG_IGN); 1759 (void) sigset(SIGHUP, SIG_IGN); 1760 setintr = 0; /* No interrupts after "logout" */ 1761 /* Trap errors inside .logout */ 1762 reenter = setexit(); 1763 if (reenter != 0) 1764 exitstat(); 1765 if (!(adrof(STRlogout))) 1766 set(STRlogout, Strsave(STRnormal), VAR_READWRITE); 1767 #ifdef _PATH_DOTLOGOUT 1768 (void) srcfile(_PATH_DOTLOGOUT, 0, 0, NULL); 1769 #endif 1770 if (adrof(STRhome)) 1771 (void) srccat(varval(STRhome), STRsldtlogout); 1772 #ifdef TESLA 1773 do_logout = 1; 1774 #endif /* TESLA */ 1775 } 1776 exitstat(); 1777 } 1778 1779 void 1780 exitstat() 1781 { 1782 #ifdef PROF 1783 monitor(0); 1784 #endif 1785 /* 1786 * Note that if STATUS is corrupted (i.e. getn bombs) then error will exit 1787 * directly because we poke child here. Otherwise we might continue 1788 * unwarrantedly (sic). 1789 */ 1790 child = 1; 1791 1792 xexit(getn(varval(STRstatus))); 1793 } 1794 1795 /* 1796 * in the event of a HUP we want to save the history 1797 */ 1798 static RETSIGTYPE 1799 phup(snum) 1800 int snum; 1801 { 1802 /* 1803 * There is no return from here, 1804 * so we are not going to release SIGHUP 1805 * anymore 1806 */ 1807 #ifdef UNRELSIGS 1808 if (snum) 1809 (void) sigset(snum, SIG_IGN); 1810 #else 1811 # ifdef BSDSIGS 1812 (void) sigblock(sigmask(SIGHUP)); 1813 # else 1814 (void) sighold(SIGHUP); 1815 # endif /* BSDSIGS */ 1816 #endif /* UNRELSIGS */ 1817 1818 if (loginsh) { 1819 set(STRlogout, Strsave(STRhangup), VAR_READWRITE); 1820 #ifdef _PATH_DOTLOGOUT 1821 (void) srcfile(_PATH_DOTLOGOUT, 0, 0, NULL); 1822 #endif 1823 if (adrof(STRhome)) 1824 (void) srccat(varval(STRhome), STRsldtlogout); 1825 } 1826 1827 record(); 1828 1829 #ifdef POSIXJOBS 1830 /* 1831 * We kill the last foreground process group. It then becomes 1832 * responsible to propagate the SIGHUP to its progeny. 1833 */ 1834 { 1835 struct process *pp, *np; 1836 1837 for (pp = proclist.p_next; pp; pp = pp->p_next) { 1838 np = pp; 1839 /* 1840 * Find if this job is in the foreground. It could be that 1841 * the process leader has exited and the foreground flag 1842 * is cleared for it. 1843 */ 1844 do 1845 /* 1846 * If a process is in the foreground we try to kill 1847 * it's process group. If we succeed, then the 1848 * whole job is gone. Otherwise we keep going... 1849 * But avoid sending HUP to the shell again. 1850 */ 1851 if (((np->p_flags & PFOREGND) != 0) && np->p_jobid != shpgrp) { 1852 np->p_flags &= ~PHUP; 1853 if (killpg(np->p_jobid, SIGHUP) != -1) { 1854 /* In case the job was suspended... */ 1855 #ifdef SIGCONT 1856 (void) killpg(np->p_jobid, SIGCONT); 1857 #endif 1858 break; 1859 } 1860 } 1861 while ((np = np->p_friends) != pp); 1862 } 1863 } 1864 #endif /* POSIXJOBS */ 1865 1866 xexit(snum); 1867 } 1868 1869 static Char *jobargv[2] = {STRjobs, 0}; 1870 1871 /* 1872 * Catch an interrupt, e.g. during lexical input. 1873 * If we are an interactive shell, we reset the interrupt catch 1874 * immediately. In any case we drain the shell output, 1875 * and finally go through the normal error mechanism, which 1876 * gets a chance to make the shell go away. 1877 */ 1878 int just_signaled; /* bugfix by Michael Bloom (mg@ttidca.TTI.COM) */ 1879 1880 RETSIGTYPE 1881 pintr(snum) 1882 int snum; 1883 { 1884 USE(snum); 1885 #ifdef UNRELSIGS 1886 if (snum) 1887 (void) sigset(snum, pintr); 1888 #endif /* UNRELSIGS */ 1889 just_signaled = 1; 1890 pintr1(1); 1891 } 1892 1893 void 1894 pintr1(wantnl) 1895 int wantnl; 1896 { 1897 Char **v; 1898 #ifdef BSDSIGS 1899 sigmask_t omask; 1900 #endif 1901 1902 #ifdef BSDSIGS 1903 omask = sigblock((sigmask_t) 0); 1904 #endif 1905 if (setintr) { 1906 #ifdef BSDSIGS 1907 (void) sigsetmask(omask & ~sigmask(SIGINT)); 1908 #else 1909 (void) sigrelse(SIGINT); 1910 #endif 1911 if (pjobs) { 1912 pjobs = 0; 1913 xputchar('\n'); 1914 dojobs(jobargv, NULL); 1915 stderror(ERR_NAME | ERR_INTR); 1916 } 1917 } 1918 /* MH - handle interrupted completions specially */ 1919 { 1920 if (InsideCompletion) 1921 stderror(ERR_SILENT); 1922 } 1923 /* JV - Make sure we shut off inputl */ 1924 { 1925 (void) Cookedmode(); 1926 GettingInput = 0; 1927 } 1928 #ifdef BSDSIGS 1929 (void) sigsetmask(omask & ~sigmask(SIGCHLD)); 1930 #else 1931 if (setintr) 1932 (void) sighold(SIGINT); 1933 (void) sigrelse(SIGCHLD); 1934 #endif 1935 drainoline(); 1936 #ifdef HAVE_GETPWENT 1937 (void) endpwent(); 1938 #endif 1939 1940 /* 1941 * If we have an active "onintr" then we search for the label. Note that if 1942 * one does "onintr -" then we shan't be interruptible so we needn't worry 1943 * about that here. 1944 */ 1945 if (gointr) { 1946 gotolab(gointr); 1947 timflg = 0; 1948 if ((v = pargv) != 0) 1949 pargv = 0, blkfree(v); 1950 if ((v = gargv) != 0) 1951 gargv = 0, blkfree(v); 1952 reset(); 1953 } 1954 else if (intty && wantnl) { 1955 if (editing) { 1956 /* 1957 * If we are editing a multi-line input command, and move to 1958 * the beginning of the line, we don't want to trash it when 1959 * we hit ^C 1960 */ 1961 PastBottom(); 1962 ClearLines(); 1963 ClearDisp(); 1964 } 1965 else { 1966 /* xputchar('\n'); *//* Some like this, others don't */ 1967 (void) putraw('\r'); 1968 (void) putraw('\n'); 1969 } 1970 } 1971 stderror(ERR_SILENT); 1972 } 1973 1974 /* 1975 * Process is the main driving routine for the shell. 1976 * It runs all command processing, except for those within { ... } 1977 * in expressions (which is run by a routine evalav in sh.exp.c which 1978 * is a stripped down process), and `...` evaluation which is run 1979 * also by a subset of this code in sh.glob.c in the routine backeval. 1980 * 1981 * The code here is a little strange because part of it is interruptible 1982 * and hence freeing of structures appears to occur when none is necessary 1983 * if this is ignored. 1984 * 1985 * Note that if catch is not set then we will unwind on any error. 1986 * If an end-of-file occurs, we return. 1987 */ 1988 static struct command *savet = NULL; 1989 void 1990 process(catch) 1991 int catch; 1992 { 1993 jmp_buf_t osetexit; 1994 /* PWP: This might get nuked my longjmp so don't make it a register var */ 1995 struct command *t = savet; 1996 1997 savet = NULL; 1998 getexit(osetexit); 1999 for (;;) { 2000 2001 pendjob(); 2002 2003 /* This was leaking memory badly, particularly when sourcing 2004 * files, etc.. For whatever reason we were arriving here with 2005 * allocated pointers still active, and the code was simply 2006 * overwriting them. I can't say I fully understand the 2007 * control flow here, but according to Purify this particular 2008 * leak has been plugged, and I haven't noticed any ill 2009 * effects.. (sg) 2010 */ 2011 if (paraml.next && paraml.next != ¶ml) 2012 freelex(¶ml); 2013 2014 paraml.next = paraml.prev = ¶ml; 2015 paraml.word = STRNULL; 2016 (void) setexit(); 2017 justpr = enterhist; /* execute if not entering history */ 2018 2019 /* 2020 * Interruptible during interactive reads 2021 */ 2022 if (setintr) 2023 #ifdef BSDSIGS 2024 (void) sigsetmask(sigblock((sigmask_t) 0) & ~sigmask(SIGINT)); 2025 #else 2026 (void) sigrelse(SIGINT); 2027 #endif 2028 2029 2030 /* 2031 * For the sake of reset() 2032 */ 2033 freelex(¶ml); 2034 if (savet) 2035 freesyn(savet), savet = NULL; 2036 2037 if (haderr) { 2038 if (!catch) { 2039 /* unwind */ 2040 doneinp = 0; 2041 savet = t; 2042 resexit(osetexit); 2043 reset(); 2044 } 2045 haderr = 0; 2046 /* 2047 * Every error is eventually caught here or the shell dies. It is 2048 * at this point that we clean up any left-over open files, by 2049 * closing all but a fixed number of pre-defined files. Thus 2050 * routines don't have to worry about leaving files open due to 2051 * deeper errors... they will get closed here. 2052 */ 2053 closem(); 2054 continue; 2055 } 2056 if (doneinp) { 2057 doneinp = 0; 2058 break; 2059 } 2060 if (chkstop) 2061 chkstop--; 2062 if (neednote) 2063 pnote(); 2064 if (intty && prompt && evalvec == 0) { 2065 just_signaled = 0; 2066 mailchk(); 2067 /* 2068 * Watch for logins/logouts. Next is scheduled commands stored 2069 * previously using "sched." Then execute periodic commands. 2070 * Following that, the prompt precmd is run. 2071 */ 2072 #ifndef HAVENOUTMP 2073 watch_login(0); 2074 #endif /* !HAVENOUTMP */ 2075 sched_run(0); 2076 period_cmd(); 2077 precmd(); 2078 /* 2079 * If we are at the end of the input buffer then we are going to 2080 * read fresh stuff. Otherwise, we are rereading input and don't 2081 * need or want to prompt. 2082 */ 2083 if (fseekp == feobp && aret == TCSH_F_SEEK) 2084 printprompt(0, NULL); 2085 flush(); 2086 setalarm(1); 2087 } 2088 if (seterr) { 2089 xfree((ptr_t) seterr); 2090 seterr = NULL; 2091 } 2092 2093 /* 2094 * Echo not only on VERBOSE, but also with history expansion. If there 2095 * is a lexical error then we forego history echo. 2096 */ 2097 if ((lex(¶ml) && !seterr && intty && !tellwhat && !Expand && 2098 !whyles) || adrof(STRverbose)) { 2099 int odidfds = didfds; 2100 haderr = 1; 2101 didfds = 0; 2102 prlex(¶ml); 2103 flush(); 2104 haderr = 0; 2105 didfds = odidfds; 2106 } 2107 (void) alarm(0); /* Autologout OFF */ 2108 2109 /* 2110 * The parser may lose space if interrupted. 2111 */ 2112 if (setintr) 2113 #ifdef BSDSIGS 2114 (void) sigblock(sigmask(SIGINT)); 2115 #else 2116 (void) sighold(SIGINT); 2117 #endif 2118 2119 /* 2120 * Save input text on the history list if reading in old history, or it 2121 * is from the terminal at the top level and not in a loop. 2122 * 2123 * PWP: entry of items in the history list while in a while loop is done 2124 * elsewhere... 2125 */ 2126 if (enterhist || (catch && intty && !whyles && !tellwhat && !arun)) 2127 savehist(¶ml, enterhist > 1); 2128 2129 if (Expand && seterr) 2130 Expand = 0; 2131 2132 /* 2133 * Print lexical error messages, except when sourcing history lists. 2134 */ 2135 if (!enterhist && seterr) 2136 stderror(ERR_OLD); 2137 2138 /* 2139 * If had a history command :p modifier then this is as far as we 2140 * should go 2141 */ 2142 if (justpr) 2143 reset(); 2144 2145 /* 2146 * If had a tellwhat from twenex() then do 2147 */ 2148 if (tellwhat) { 2149 (void) tellmewhat(¶ml, NULL); 2150 reset(); 2151 } 2152 2153 alias(¶ml); 2154 2155 #ifdef BSDJOBS 2156 /* 2157 * If we are interactive, try to continue jobs that we have stopped 2158 */ 2159 if (prompt) 2160 continue_jobs(¶ml); 2161 #endif /* BSDJOBS */ 2162 2163 /* 2164 * Check to see if the user typed "rm * .o" or something 2165 */ 2166 if (prompt) 2167 rmstar(¶ml); 2168 /* 2169 * Parse the words of the input into a parse tree. 2170 */ 2171 savet = syntax(paraml.next, ¶ml, 0); 2172 if (seterr) 2173 stderror(ERR_OLD); 2174 2175 postcmd(); 2176 /* 2177 * Execute the parse tree From: Michael Schroeder 2178 * <mlschroe@immd4.informatik.uni-erlangen.de> was execute(t, tpgrp); 2179 */ 2180 execute(savet, (tpgrp > 0 ? tpgrp : -1), NULL, NULL, TRUE); 2181 2182 /* 2183 * Made it! 2184 */ 2185 freelex(¶ml); 2186 freesyn(savet), savet = NULL; 2187 #ifdef SIG_WINDOW 2188 if (windowchg || (catch && intty && !whyles && !tellwhat)) { 2189 (void) check_window_size(0); /* for window systems */ 2190 } 2191 #endif /* SIG_WINDOW */ 2192 set(STR_, Strsave(InputBuf), VAR_READWRITE | VAR_NOGLOB); 2193 } 2194 savet = t; 2195 resexit(osetexit); 2196 } 2197 2198 /*ARGSUSED*/ 2199 void 2200 dosource(t, c) 2201 Char **t; 2202 struct command *c; 2203 { 2204 Char *f; 2205 int hflg = 0; 2206 char buf[BUFSIZE]; 2207 2208 USE(c); 2209 t++; 2210 if (*t && eq(*t, STRmh)) { 2211 if (*++t == NULL) 2212 stderror(ERR_NAME | ERR_HFLAG); 2213 hflg++; 2214 } 2215 else if (*t && eq(*t, STRmm)) { 2216 if (*++t == NULL) 2217 stderror(ERR_NAME | ERR_MFLAG); 2218 hflg = 2; 2219 } 2220 2221 f = globone(*t++, G_ERROR); 2222 (void) strcpy(buf, short2str(f)); 2223 xfree((ptr_t) f); 2224 gflag = 0, tglob(t); 2225 if (gflag) { 2226 t = globall(t); 2227 if (t == 0) 2228 stderror(ERR_NAME | ERR_NOMATCH); 2229 } else { 2230 t = saveblk(t); 2231 trim(t); 2232 } 2233 if ((!srcfile(buf, 0, hflg, t)) && (!hflg) && (!bequiet)) 2234 stderror(ERR_SYSTEM, buf, strerror(errno)); 2235 } 2236 2237 /* 2238 * Check for mail. 2239 * If we are a login shell, then we don't want to tell 2240 * about any mail file unless its been modified 2241 * after the time we started. 2242 * This prevents us from telling the user things he already 2243 * knows, since the login program insists on saying 2244 * "You have mail." 2245 */ 2246 2247 /* 2248 * The AMS version. 2249 * This version checks if the file is a directory, and if so, 2250 * tells you the number of files in it, otherwise do the old thang. 2251 * The magic "+1" in the time calculation is to compensate for 2252 * an AFS bug where directory mtimes are set to 1 second in 2253 * the future. 2254 */ 2255 2256 static void 2257 mailchk() 2258 { 2259 struct varent *v; 2260 Char **vp; 2261 time_t t; 2262 int intvl, cnt; 2263 struct stat stb; 2264 int new; 2265 2266 v = adrof(STRmail); 2267 if (v == NULL || v->vec == NULL) 2268 return; 2269 (void) time(&t); 2270 vp = v->vec; 2271 cnt = blklen(vp); 2272 intvl = (cnt && number(*vp)) ? (--cnt, getn(*vp++)) : MAILINTVL; 2273 if (intvl < 1) 2274 intvl = 1; 2275 if (chktim + intvl > t) 2276 return; 2277 for (; *vp; vp++) { 2278 char *filename = short2str(*vp); 2279 char *mboxdir = filename; 2280 2281 if (stat(filename, &stb) < 0) 2282 continue; 2283 #if defined(BSDTIMES) || defined(_SEQUENT_) 2284 new = stb.st_mtime > time0.tv_sec; 2285 #else 2286 new = stb.st_mtime > seconds0; 2287 #endif 2288 if (S_ISDIR(stb.st_mode)) { 2289 DIR *mailbox; 2290 int mailcount = 0; 2291 char tempfilename[MAXPATHLEN]; 2292 struct stat stc; 2293 2294 xsnprintf(tempfilename, MAXPATHLEN, "%s/new", filename); 2295 2296 if (stat(tempfilename, &stc) != -1 && S_ISDIR(stc.st_mode)) { 2297 /* 2298 * "filename/new" exists and is a directory; you are 2299 * using Qmail. 2300 */ 2301 stb = stc; 2302 #if defined(BSDTIMES) || defined(_SEQUENT_) 2303 new = stb.st_mtime > time0.tv_sec; 2304 #else 2305 new = stb.st_mtime > seconds0; 2306 #endif 2307 mboxdir = tempfilename; 2308 } 2309 2310 if (stb.st_mtime <= chktim + 1 || (loginsh && !new)) 2311 continue; 2312 2313 if ((mailbox = opendir(mboxdir)) == NULL) 2314 continue; 2315 2316 /* skip . and .. */ 2317 if (!readdir(mailbox) || !readdir(mailbox)) 2318 continue; 2319 2320 while (readdir(mailbox)) 2321 mailcount++; 2322 2323 if (mailcount == 0) 2324 continue; 2325 2326 if (cnt == 1) 2327 xprintf(CGETS(11, 3, "You have %d mail messages.\n"), 2328 mailcount); 2329 else 2330 xprintf(CGETS(11, 4, "You have %d mail messages in %s.\n"), 2331 mailcount, filename); 2332 } 2333 else { 2334 char *type; 2335 2336 if (stb.st_size == 0 || stb.st_atime > stb.st_mtime || 2337 (stb.st_atime <= chktim && stb.st_mtime <= chktim) || 2338 (loginsh && !new)) 2339 continue; 2340 type = strsave(new ? CGETS(11, 6, "new ") : ""); 2341 if (cnt == 1) 2342 xprintf(CGETS(11, 5, "You have %smail.\n"), type); 2343 else 2344 xprintf(CGETS(11, 7, "You have %smail in %s.\n"), type, filename); 2345 xfree(type); 2346 } 2347 } 2348 chktim = t; 2349 } 2350 2351 /* 2352 * Extract a home directory from the password file 2353 * The argument points to a buffer where the name of the 2354 * user whose home directory is sought is currently. 2355 * We write the home directory of the user back there. 2356 */ 2357 int 2358 gethdir(home) 2359 Char *home; 2360 { 2361 Char *h; 2362 2363 /* 2364 * Is it us? 2365 */ 2366 if (*home == '\0') { 2367 if ((h = varval(STRhome)) != STRNULL) { 2368 (void) Strcpy(home, h); 2369 return 0; 2370 } 2371 else 2372 return 1; 2373 } 2374 2375 /* 2376 * Look in the cache 2377 */ 2378 if ((h = gettilde(home)) == NULL) 2379 return 1; 2380 else { 2381 (void) Strcpy(home, h); 2382 return 0; 2383 } 2384 } 2385 2386 /* 2387 * Move the initial descriptors to their eventual 2388 * resting places, closing all other units. 2389 */ 2390 void 2391 initdesc() 2392 { 2393 #ifdef NLS_BUGS 2394 #ifdef NLS_CATALOGS 2395 nlsclose(); 2396 #endif /* NLS_CATALOGS */ 2397 #endif /* NLS_BUGS */ 2398 2399 2400 didfds = 0; /* 0, 1, 2 aren't set up */ 2401 (void) close_on_exec(SHIN = dcopy(0, FSHIN), 1); 2402 (void) close_on_exec(SHOUT = dcopy(1, FSHOUT), 1); 2403 (void) close_on_exec(SHDIAG = dcopy(2, FSHDIAG), 1); 2404 (void) close_on_exec(OLDSTD = dcopy(SHIN, FOLDSTD), 1); 2405 #ifndef CLOSE_ON_EXEC 2406 didcch = 0; /* Havent closed for child */ 2407 #endif /* CLOSE_ON_EXEC */ 2408 isdiagatty = isatty(SHDIAG); 2409 isoutatty = isatty(SHOUT); 2410 #ifdef NLS_BUGS 2411 #ifdef NLS_CATALOGS 2412 nlsinit(); 2413 #endif /* NLS_CATALOGS */ 2414 #endif /* NLS_BUGS */ 2415 } 2416 2417 2418 void 2419 #ifdef PROF 2420 done(i) 2421 #else 2422 xexit(i) 2423 #endif 2424 int i; 2425 { 2426 #ifdef TESLA 2427 if (loginsh && do_logout) { 2428 /* this is to send hangup signal to the develcon */ 2429 /* we toggle DTR. clear dtr - sleep 1 - set dtr */ 2430 /* ioctl will return ENOTTY for pty's but we ignore it */ 2431 /* exitstat will run after disconnect */ 2432 /* we sleep for 2 seconds to let things happen in */ 2433 /* .logout and rechist() */ 2434 #ifdef TIOCCDTR 2435 (void) sleep(2); 2436 (void) ioctl(FSHTTY, TIOCCDTR, NULL); 2437 (void) sleep(1); 2438 (void) ioctl(FSHTTY, TIOCSDTR, NULL); 2439 #endif /* TIOCCDTR */ 2440 } 2441 #endif /* TESLA */ 2442 2443 { 2444 struct process *pp, *np; 2445 2446 /* Kill all processes marked for hup'ing */ 2447 for (pp = proclist.p_next; pp; pp = pp->p_next) { 2448 np = pp; 2449 do 2450 if ((np->p_flags & PHUP) && np->p_jobid != shpgrp) { 2451 if (killpg(np->p_jobid, SIGHUP) != -1) { 2452 /* In case the job was suspended... */ 2453 #ifdef SIGCONT 2454 (void) killpg(np->p_jobid, SIGCONT); 2455 #endif 2456 break; 2457 } 2458 } 2459 while ((np = np->p_friends) != pp); 2460 } 2461 } 2462 untty(); 2463 #ifdef NLS_CATALOGS 2464 /* 2465 * We need to call catclose, because SVR4 leaves symlinks behind otherwise 2466 * in the catalog directories. We cannot close on a vforked() child, 2467 * because messages will stop working on the parent too. 2468 */ 2469 if (child == 0) 2470 nlsclose(); 2471 #endif /* NLS_CATALOGS */ 2472 #ifdef WINNT_NATIVE 2473 nt_cleanup(); 2474 #endif /* WINNT_NATIVE */ 2475 _exit(i); 2476 } 2477 2478 #ifndef _PATH_DEFPATH 2479 static Char ** 2480 defaultpath() 2481 { 2482 char *ptr; 2483 Char **blk, **blkp; 2484 struct stat stb; 2485 2486 blkp = blk = (Char **) xmalloc((size_t) sizeof(Char *) * 10); 2487 2488 #ifndef NODOT 2489 # ifndef DOTLAST 2490 *blkp++ = Strsave(STRdot); 2491 # endif 2492 #endif 2493 2494 #define DIRAPPEND(a) \ 2495 if (stat(ptr = a, &stb) == 0 && S_ISDIR(stb.st_mode)) \ 2496 *blkp++ = SAVE(ptr) 2497 2498 #ifdef _PATH_LOCAL 2499 DIRAPPEND(_PATH_LOCAL); 2500 #endif 2501 2502 #ifdef _PATH_USRUCB 2503 DIRAPPEND(_PATH_USRUCB); 2504 #endif 2505 2506 #ifdef _PATH_USRBSD 2507 DIRAPPEND(_PATH_USRBSD); 2508 #endif 2509 2510 #ifdef _PATH_BIN 2511 DIRAPPEND(_PATH_BIN); 2512 #endif 2513 2514 #ifdef _PATH_USRBIN 2515 DIRAPPEND(_PATH_USRBIN); 2516 #endif 2517 2518 #undef DIRAPPEND 2519 2520 #ifndef NODOT 2521 # ifdef DOTLAST 2522 *blkp++ = Strsave(STRdot); 2523 # endif 2524 #endif 2525 *blkp = NULL; 2526 return (blk); 2527 } 2528 #endif 2529 2530 static void 2531 record() 2532 { 2533 if (!fast) { 2534 recdirs(NULL, adrof(STRsavedirs) != NULL); 2535 rechist(NULL, adrof(STRsavehist) != NULL); 2536 } 2537 } 2538