1 /* $Header: /src/pub/tcsh/sh.c,v 3.95 2001/04/27 22:36:39 christos Exp $ */ 2 /* 3 * sh.c: Main shell routines 4 */ 5 /*- 6 * Copyright (c) 1980, 1991 The Regents of the University of California. 7 * All rights reserved. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 3. All advertising materials mentioning features or use of this software 18 * must display the following acknowledgement: 19 * This product includes software developed by the University of 20 * California, Berkeley and its contributors. 21 * 4. Neither the name of the University nor the names of its contributors 22 * may be used to endorse or promote products derived from this software 23 * without specific prior written permission. 24 * 25 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 26 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 27 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 28 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 30 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 31 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 32 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 33 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 34 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 35 * SUCH DAMAGE. 36 */ 37 #define EXTERN /* Intern */ 38 #include "sh.h" 39 40 #ifndef lint 41 char copyright[] = 42 "@(#) Copyright (c) 1991 The Regents of the University of California.\n\ 43 All rights reserved.\n"; 44 #endif /* not lint */ 45 46 RCSID("$Id: sh.c,v 3.95 2001/04/27 22:36:39 christos Exp $") 47 48 #include "tc.h" 49 #include "ed.h" 50 #include "tw.h" 51 52 extern bool MapsAreInited; 53 extern bool NLSMapsAreInited; 54 extern bool NoNLSRebind; 55 56 /* 57 * C Shell 58 * 59 * Bill Joy, UC Berkeley, California, USA 60 * October 1978, May 1980 61 * 62 * Jim Kulp, IIASA, Laxenburg, Austria 63 * April 1980 64 * 65 * Filename recognition added: 66 * Ken Greer, Ind. Consultant, Palo Alto CA 67 * October 1983. 68 * 69 * Karl Kleinpaste, Computer Consoles, Inc. 70 * Added precmd, periodic/tperiod, prompt changes, 71 * directory stack hack, and login watch. 72 * Sometime March 1983 - Feb 1984. 73 * 74 * Added scheduled commands, including the "sched" command, 75 * plus the call to sched_run near the precmd et al 76 * routines. 77 * Upgraded scheduled events for running events while 78 * sitting idle at command input. 79 * 80 * Paul Placeway, Ohio State 81 * added stuff for running with twenex/inputl 9 Oct 1984. 82 * 83 * ported to Apple Unix (TM) (OREO) 26 -- 29 Jun 1987 84 */ 85 86 jmp_buf_t reslab INIT_ZERO_STRUCT; 87 88 static const char tcshstr[] = "tcsh"; 89 #ifdef WINNT_NATIVE 90 static const char tcshstr_nt[] = "tcsh.exe"; 91 #endif /* WINNT_NATIVE */ 92 93 signalfun_t parintr = 0; /* Parents interrupt catch */ 94 signalfun_t parterm = 0; /* Parents terminate catch */ 95 96 #ifdef TESLA 97 int do_logout = 0; 98 #endif /* TESLA */ 99 100 101 bool use_fork = 0; /* use fork() instead of vfork()? */ 102 103 /* 104 * Magic pointer values. Used to specify other invalid conditions aside 105 * from null. 106 */ 107 static Char INVCHAR; 108 Char *INVPTR = &INVCHAR; 109 Char **INVPPTR = &INVPTR; 110 111 static int nofile = 0; 112 static bool reenter = 0; 113 static bool nverbose = 0; 114 static bool nexececho = 0; 115 static bool quitit = 0; 116 static bool rdirs = 0; 117 bool fast = 0; 118 static bool batch = 0; 119 static bool mflag = 0; 120 static bool prompt = 1; 121 static int enterhist = 0; 122 bool tellwhat = 0; 123 time_t t_period; 124 Char *ffile = NULL; 125 bool dolzero = 0; 126 int insource = 0; 127 int exitset = 0; 128 static time_t chktim; /* Time mail last checked */ 129 char *progname; 130 int tcsh; 131 extern char **environ; 132 133 /* 134 * This preserves the input state of the shell. It is used by 135 * st_save and st_restore to manupulate shell state. 136 */ 137 struct saved_state { 138 int insource; 139 int SHIN; 140 int intty; 141 struct whyle *whyles; 142 Char *gointr; 143 Char *arginp; 144 Char *evalp; 145 Char **evalvec; 146 Char *alvecp; 147 Char **alvec; 148 int onelflg; 149 bool enterhist; 150 Char **argv; 151 Char HIST; 152 bool cantell; 153 struct Bin B; 154 /* These keep signal state and setjump state */ 155 #ifdef BSDSIGS 156 sigmask_t mask; 157 #endif 158 jmp_buf_t oldexit; 159 int reenter; 160 }; 161 162 static int srccat __P((Char *, Char *)); 163 #ifndef WINNT_NATIVE 164 static int srcfile __P((char *, bool, int, Char **)); 165 #else 166 int srcfile __P((char *, bool, int, Char **)); 167 #endif /*WINNT_NATIVE*/ 168 static sigret_t phup __P((int)); 169 static void srcunit __P((int, bool, int, Char **)); 170 static void mailchk __P((void)); 171 #ifndef _PATH_DEFPATH 172 static Char **defaultpath __P((void)); 173 #endif 174 static void record __P((void)); 175 static void st_save __P((struct saved_state *, int, int, 176 Char **, Char **)); 177 static void st_restore __P((struct saved_state *, Char **)); 178 179 int main __P((int, char **)); 180 181 int 182 main(argc, argv) 183 int argc; 184 char **argv; 185 { 186 register Char *cp; 187 #ifdef AUTOLOGOUT 188 register Char *cp2; 189 #endif 190 register char *tcp, *ttyn; 191 register int f; 192 register char **tempv; 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(dup2(open("/tmp/tcsh.trace", 215 O_WRONLY|O_CREAT, 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)) == -1 && 243 (f = open("/", O_RDONLY)) == -1) 244 exit(1); 245 while (f < 3); 246 (void) close(f); 247 } 248 249 osinit(); /* Os dependent initialization */ 250 251 252 { 253 char *t; 254 255 t = strrchr(argv[0], '/'); 256 #ifdef WINNT_NATIVE 257 { 258 char *s = strrchr(argv[0], '\\'); 259 if (s) 260 t = s; 261 } 262 #endif /* WINNT_NATIVE */ 263 t = t ? t + 1 : argv[0]; 264 if (*t == '-') t++; 265 progname = strsave((t && *t) ? t : tcshstr); /* never want a null */ 266 tcsh = strcmp(progname, tcshstr) == 0; 267 } 268 269 /* 270 * Initialize non constant strings 271 */ 272 #ifdef _PATH_BSHELL 273 STR_BSHELL = SAVE(_PATH_BSHELL); 274 #endif 275 #ifdef _PATH_TCSHELL 276 STR_SHELLPATH = SAVE(_PATH_TCSHELL); 277 #else 278 # ifdef _PATH_CSHELL 279 STR_SHELLPATH = SAVE(_PATH_CSHELL); 280 # endif 281 #endif 282 STR_environ = blk2short(environ); 283 environ = short2blk(STR_environ); /* So that we can free it */ 284 STR_WORD_CHARS = SAVE(WORD_CHARS); 285 286 HIST = '!'; 287 HISTSUB = '^'; 288 PRCH = '>'; 289 PRCHROOT = '#'; 290 word_chars = STR_WORD_CHARS; 291 bslash_quote = 0; /* PWP: do tcsh-style backslash quoting? */ 292 293 /* Default history size to 100 */ 294 set(STRhistory, SAVE("100"), VAR_READWRITE); 295 296 tempv = argv; 297 ffile = SAVE(tempv[0]); 298 dolzero = 0; 299 if (eq(ffile, STRaout)) /* A.out's are quittable */ 300 quitit = 1; 301 uid = getuid(); 302 gid = getgid(); 303 euid = geteuid(); 304 egid = getegid(); 305 #if defined(OREO) || defined(DT_SUPPORT) 306 /* 307 * We are a login shell if: 1. we were invoked as -<something> with 308 * optional arguments 2. or we were invoked only with the -l flag 309 */ 310 loginsh = (**tempv == '-') || (argc == 2 && 311 tempv[1][0] == '-' && tempv[1][1] == 'l' && 312 tempv[1][2] == '\0'); 313 #else 314 /* 315 * We are a login shell if: 1. we were invoked as -<something> and we had 316 * no arguments 2. or we were invoked only with the -l flag 317 */ 318 loginsh = (**tempv == '-' && argc == 1) || (argc == 2 && 319 tempv[1][0] == '-' && tempv[1][1] == 'l' && 320 tempv[1][2] == '\0'); 321 #endif 322 323 #ifdef _VMS_POSIX 324 /* No better way to find if we are a login shell */ 325 if (!loginsh) { 326 loginsh = (argc == 1 && getppid() == 1); 327 **tempv = '-'; /* Avoid giving VMS an acidic stomach */ 328 } 329 #endif /* _VMS_POSIX */ 330 331 if (loginsh && **tempv != '-') { 332 /* 333 * Mangle the argv space 334 */ 335 tempv[1][0] = '\0'; 336 tempv[1][1] = '\0'; 337 tempv[1] = NULL; 338 for (tcp = *tempv; *tcp++;) 339 continue; 340 for (tcp--; tcp >= *tempv; tcp--) 341 tcp[1] = tcp[0]; 342 *++tcp = '-'; 343 argc--; 344 } 345 if (loginsh) { 346 (void) time(&chktim); 347 set(STRloginsh, Strsave(STRNULL), VAR_READWRITE); 348 } 349 350 AsciiOnly = 1; 351 NoNLSRebind = getenv("NOREBIND") != NULL; 352 #ifdef NLS 353 # ifdef SETLOCALEBUG 354 dont_free = 1; 355 # endif /* SETLOCALEBUG */ 356 (void) setlocale(LC_ALL, ""); 357 # ifdef LC_COLLATE 358 (void) setlocale(LC_COLLATE, ""); 359 # endif 360 # ifdef SETLOCALEBUG 361 dont_free = 0; 362 # endif /* SETLOCALEBUG */ 363 # ifdef STRCOLLBUG 364 fix_strcoll_bug(); 365 # endif /* STRCOLLBUG */ 366 367 { 368 int k; 369 370 for (k = 0200; k <= 0377 && !Isprint(k); k++) 371 continue; 372 AsciiOnly = k > 0377; 373 } 374 #else 375 AsciiOnly = getenv("LANG") == NULL && getenv("LC_CTYPE") == NULL; 376 #endif /* NLS */ 377 if (MapsAreInited && !NLSMapsAreInited) 378 ed_InitNLSMaps(); 379 ResetArrowKeys(); 380 381 /* 382 * Initialize for periodic command intervals. Also, initialize the dummy 383 * tty list for login-watch. 384 */ 385 (void) time(&t_period); 386 #ifndef HAVENOUTMP 387 initwatch(); 388 #endif /* !HAVENOUTMP */ 389 390 #if defined(alliant) 391 /* 392 * From: Jim Pace <jdp@research.att.com> 393 * tcsh does not work properly on the alliants through an rlogin session. 394 * The shell generally hangs. Also, reference to the controlling terminal 395 * does not work ( ie: echo foo > /dev/tty ). 396 * 397 * A security feature was added to rlogind affecting FX/80's Concentrix 398 * from revision 5.5.xx upwards (through 5.7 where this fix was implemented) 399 * This security change also affects the FX/2800 series. 400 * The security change to rlogind requires the process group of an rlogin 401 * session become disassociated with the tty in rlogind. 402 * 403 * The changes needed are: 404 * 1. set the process group 405 * 2. reenable the control terminal 406 */ 407 if (loginsh && isatty(SHIN)) { 408 ttyn = (char *) ttyname(SHIN); 409 (void) close(SHIN); 410 SHIN = open(ttyn, O_RDWR); 411 shpgrp = getpid(); 412 (void) ioctl (SHIN, TIOCSPGRP, (ioctl_t) &shpgrp); 413 (void) setpgid(0, shpgrp); 414 } 415 #endif /* alliant */ 416 417 /* 418 * Move the descriptors to safe places. The variable didfds is 0 while we 419 * have only FSH* to work with. When didfds is true, we have 0,1,2 and 420 * prefer to use these. 421 */ 422 initdesc(); 423 424 /* 425 * Get and set the tty now 426 */ 427 if ((ttyn = ttyname(SHIN)) != NULL) { 428 /* 429 * Could use rindex to get rid of other possible path components, but 430 * hpux preserves the subdirectory /pty/ when storing the tty name in 431 * utmp, so we keep it too. 432 */ 433 if (strncmp(ttyn, "/dev/", 5) == 0) 434 set(STRtty, cp = SAVE(ttyn + 5), VAR_READWRITE); 435 else 436 set(STRtty, cp = SAVE(ttyn), VAR_READWRITE); 437 } 438 else 439 set(STRtty, cp = SAVE(""), VAR_READWRITE); 440 /* 441 * Initialize the shell variables. ARGV and PROMPT are initialized later. 442 * STATUS is also munged in several places. CHILD is munged when 443 * forking/waiting 444 */ 445 446 /* 447 * 7-10-87 Paul Placeway autologout should be set ONLY on login shells and 448 * on shells running as root. Out of these, autologout should NOT be set 449 * for any psudo-terminals (this catches most window systems) and not for 450 * any terminal running X windows. 451 * 452 * At Ohio State, we have had problems with a user having his X session 453 * drop out from under him (on a Sun) because the shell in his master 454 * xterm timed out and exited. 455 * 456 * Really, this should be done with a program external to the shell, that 457 * watches for no activity (and NO running programs, such as dump) on a 458 * terminal for a long peroid of time, and then SIGHUPS the shell on that 459 * terminal. 460 * 461 * bugfix by Rich Salz <rsalz@PINEAPPLE.BBN.COM>: For root rsh things 462 * allways first check to see if loginsh or really root, then do things 463 * with ttyname() 464 * 465 * Also by Jean-Francois Lamy <lamy%ai.toronto.edu@RELAY.CS.NET>: check the 466 * value of cp before using it! ("root can rsh too") 467 * 468 * PWP: keep the nested ifs; the order of the tests matters and a good 469 * (smart) C compiler might re-arange things wrong. 470 */ 471 #ifdef AUTOLOGOUT 472 # ifdef convex 473 if (uid == 0) { 474 /* root always has a 15 minute autologout */ 475 set(STRautologout, Strsave(STRrootdefautologout), VAR_READWRITE); 476 } 477 else 478 if (loginsh) 479 /* users get autologout set to 0 */ 480 set(STRautologout, Strsave(STR0), VAR_READWRITE); 481 # else /* convex */ 482 if (loginsh || (uid == 0)) { 483 if (*cp) { 484 /* only for login shells or root and we must have a tty */ 485 if ((cp2 = Strrchr(cp, (Char) '/')) != NULL) { 486 cp = cp2 + 1; 487 } 488 else 489 cp2 = cp; 490 if (!(((Strncmp(cp2, STRtty, 3) == 0) && Isalpha(cp2[3])) || 491 ((Strncmp(cp, STRpts, 3) == 0) && cp[3] == '/'))) { 492 if (getenv("DISPLAY") == NULL) { 493 /* NOT on X window shells */ 494 set(STRautologout, Strsave(STRdefautologout), 495 VAR_READWRITE); 496 } 497 } 498 } 499 } 500 # endif /* convex */ 501 #endif /* AUTOLOGOUT */ 502 503 (void) sigset(SIGALRM, alrmcatch); 504 505 set(STRstatus, Strsave(STR0), VAR_READWRITE); 506 507 /* 508 * get and set machine specific envirnment variables 509 */ 510 getmachine(); 511 512 fix_version(); /* publish the shell version */ 513 514 /* 515 * Publish the selected echo style 516 */ 517 #if ECHO_STYLE == NONE_ECHO 518 set(STRecho_style, Strsave(STRnone), VAR_READWRITE); 519 #endif /* ECHO_STYLE == NONE_ECHO */ 520 #if ECHO_STYLE == BSD_ECHO 521 set(STRecho_style, Strsave(STRbsd), VAR_READWRITE); 522 #endif /* ECHO_STYLE == BSD_ECHO */ 523 #if ECHO_STYLE == SYSV_ECHO 524 set(STRecho_style, Strsave(STRsysv), VAR_READWRITE); 525 #endif /* ECHO_STYLE == SYSV_ECHO */ 526 #if ECHO_STYLE == BOTH_ECHO 527 set(STRecho_style, Strsave(STRboth), VAR_READWRITE); 528 #endif /* ECHO_STYLE == BOTH_ECHO */ 529 530 /* 531 * increment the shell level. 532 */ 533 shlvl(1); 534 535 if ((tcp = getenv("HOME")) != NULL) { 536 if (strlen(tcp) >= MAXPATHLEN) { 537 struct passwd *pw; 538 if ((pw = getpwuid(getuid())) != NULL) 539 cp = quote(SAVE(pw->pw_dir)); 540 else { 541 tcp[MAXPATHLEN-1] = '\0'; 542 cp = quote(SAVE(tcp)); 543 } 544 } else { 545 cp = quote(SAVE(tcp)); 546 } 547 } else 548 cp = NULL; 549 550 if (cp == NULL) 551 fast = 1; /* No home -> can't read scripts */ 552 else 553 set(STRhome, cp, VAR_READWRITE); 554 555 dinit(cp); /* dinit thinks that HOME == cwd in a login 556 * shell */ 557 /* 558 * Grab other useful things from the environment. Should we grab 559 * everything?? 560 */ 561 { 562 char *cln, *cus, *cgr; 563 Char buff[BUFSIZE]; 564 struct passwd *pw; 565 struct group *gr; 566 567 568 #ifdef apollo 569 int oid = getoid(); 570 571 (void) Itoa(oid, buff, 0, 0); 572 set(STRoid, Strsave(buff), VAR_READWRITE); 573 #endif /* apollo */ 574 575 (void) Itoa(uid, buff, 0, 0); 576 set(STRuid, Strsave(buff), VAR_READWRITE); 577 578 (void) Itoa(gid, buff, 0, 0); 579 set(STRgid, Strsave(buff), VAR_READWRITE); 580 581 cln = getenv("LOGNAME"); 582 cus = getenv("USER"); 583 if (cus != NULL) 584 set(STRuser, quote(SAVE(cus)), VAR_READWRITE); 585 else if (cln != NULL) 586 set(STRuser, quote(SAVE(cln)), VAR_READWRITE); 587 else if ((pw = getpwuid(uid)) == NULL) 588 set(STRuser, SAVE("unknown"), VAR_READWRITE); 589 else 590 set(STRuser, SAVE(pw->pw_name), VAR_READWRITE); 591 if (cln == NULL) 592 tsetenv(STRLOGNAME, varval(STRuser)); 593 if (cus == NULL) 594 tsetenv(STRKUSER, varval(STRuser)); 595 596 cgr = getenv("GROUP"); 597 if (cgr != NULL) 598 set(STRgroup, quote(SAVE(cgr)), VAR_READWRITE); 599 else if ((gr = getgrgid(gid)) == NULL) 600 set(STRgroup, SAVE("unknown"), VAR_READWRITE); 601 else 602 set(STRgroup, SAVE(gr->gr_name), VAR_READWRITE); 603 if (cgr == NULL) 604 tsetenv(STRKGROUP, varval(STRgroup)); 605 } 606 607 /* 608 * HOST may be wrong, since rexd transports the entire environment on sun 609 * 3.x Just set it again 610 */ 611 { 612 char cbuff[MAXHOSTNAMELEN]; 613 614 if (gethostname(cbuff, sizeof(cbuff)) >= 0) { 615 cbuff[sizeof(cbuff) - 1] = '\0'; /* just in case */ 616 tsetenv(STRHOST, str2short(cbuff)); 617 } 618 else 619 tsetenv(STRHOST, str2short("unknown")); 620 } 621 622 623 #ifdef REMOTEHOST 624 /* 625 * Try to determine the remote host we were logged in from. 626 */ 627 remotehost(); 628 #endif /* REMOTEHOST */ 629 630 #ifdef apollo 631 if ((tcp = getenv("SYSTYPE")) == NULL) 632 tcp = "bsd4.3"; 633 tsetenv(STRSYSTYPE, quote(str2short(tcp))); 634 #endif /* apollo */ 635 636 /* 637 * set editing on by default, unless running under Emacs as an inferior 638 * shell. 639 * We try to do this intelligently. If $TERM is available, then it 640 * should determine if we should edit or not. $TERM is preserved 641 * across rlogin sessions, so we will not get confused if we rlogin 642 * under an emacs shell. Another advantage is that if we run an 643 * xterm under an emacs shell, then the $TERM will be set to 644 * xterm, so we are going to want to edit. Unfortunately emacs 645 * does not restore all the tty modes, so xterm is not very well 646 * set up. But this is not the shell's fault. 647 * Also don't edit if $TERM == wm, for when we're running under an ATK app. 648 * Finally, emacs compiled under terminfo, sets the terminal to dumb, 649 * so disable editing for that too. 650 * 651 * Unfortunately, in some cases the initial $TERM setting is "unknown", 652 * "dumb", or "network" which is then changed in the user's startup files. 653 * We fix this by setting noediting here if $TERM is unknown/dumb and 654 * if noediting is set, we switch on editing if $TERM is changed. 655 */ 656 if ((tcp = getenv("TERM")) != NULL) { 657 set(STRterm, quote(SAVE(tcp)), VAR_READWRITE); 658 noediting = strcmp(tcp, "unknown") == 0 || strcmp(tcp, "dumb") == 0 || 659 strcmp(tcp, "network") == 0; 660 editing = strcmp(tcp, "emacs") != 0 && strcmp(tcp, "wm") != 0 && 661 !noediting; 662 } 663 else { 664 noediting = 0; 665 editing = ((tcp = getenv("EMACS")) == NULL || strcmp(tcp, "t") != 0); 666 } 667 668 /* 669 * The 'edit' variable is either set or unset. It doesn't 670 * need a value. Making it 'emacs' might be confusing. 671 */ 672 if (editing) 673 set(STRedit, Strsave(STRNULL), VAR_READWRITE); 674 675 676 /* 677 * still more mutability: make the complete routine automatically add the 678 * suffix of file names... 679 */ 680 set(STRaddsuffix, Strsave(STRNULL), VAR_READWRITE); 681 682 /* 683 * Random default kill ring size 684 */ 685 set(STRkillring, SAVE("30"), VAR_READWRITE); 686 687 /* 688 * Re-initialize path if set in environment 689 */ 690 if ((tcp = getenv("PATH")) == NULL) 691 #ifdef _PATH_DEFPATH 692 importpath(str2short(_PATH_DEFPATH)); 693 #else /* !_PATH_DEFPATH */ 694 setq(STRpath, defaultpath(), &shvhed, VAR_READWRITE); 695 #endif /* _PATH_DEFPATH */ 696 else 697 /* Importpath() allocates memory for the path, and the 698 * returned pointer from SAVE() was discarded, so 699 * this was a memory leak.. (sg) 700 * 701 * importpath(SAVE(tcp)); 702 */ 703 importpath(str2short(tcp)); 704 705 706 { 707 /* If the SHELL environment variable ends with "tcsh", set 708 * STRshell to the same path. This is to facilitate using 709 * the executable in environments where the compiled-in 710 * default isn't appropriate (sg). 711 */ 712 713 int sh_len = 0; 714 715 if ((tcp = getenv("SHELL")) != NULL) { 716 sh_len = strlen(tcp); 717 if ((sh_len >= 5 && strcmp(tcp + (sh_len - 5), "/tcsh") == 0) || 718 (!tcsh && sh_len >= 4 && strcmp(tcp + (sh_len - 4), "/csh") == 0)) 719 set(STRshell, quote(SAVE(tcp)), VAR_READWRITE); 720 else 721 sh_len = 0; 722 } 723 if (sh_len == 0) 724 set(STRshell, Strsave(STR_SHELLPATH), VAR_READWRITE); 725 } 726 727 #ifdef COLOR_LS_F 728 if ((tcp = getenv("LS_COLORS")) != NULL) 729 parseLS_COLORS(str2short(tcp)); 730 #endif /* COLOR_LS_F */ 731 732 doldol = putn((int) getpid()); /* For $$ */ 733 #ifdef WINNT_NATIVE 734 { 735 char *strtmp1, strtmp2[MAXPATHLEN]; 736 if ((strtmp1 = getenv("TMP")) != NULL) 737 wsprintf(strtmp2, "%s/%s", strtmp1, "sh"); 738 shtemp = Strspl(SAVE(strtmp2), doldol); /* For << */ 739 } 740 #else /* !WINNT_NATIVE */ 741 shtemp = Strspl(STRtmpsh, doldol); /* For << */ 742 #endif /* WINNT_NATIVE */ 743 744 /* 745 * Record the interrupt states from the parent process. If the parent is 746 * non-interruptible our hand must be forced or we (and our children) won't 747 * be either. Our children inherit termination from our parent. We catch it 748 * only if we are the login shell. 749 */ 750 #ifdef BSDSIGS 751 /* 752 * PURIFY-2 claims that osv does not get 753 * initialized after the sigvec call 754 */ 755 setzero((char*) &osv, sizeof(osv)); 756 /* parents interruptibility */ 757 (void) mysigvec(SIGINT, NULL, &osv); 758 parintr = (signalfun_t) osv.sv_handler; 759 (void) mysigvec(SIGTERM, NULL, &osv); 760 parterm = (signalfun_t) osv.sv_handler; 761 #else /* BSDSIGS */ 762 parintr = signal(SIGINT, SIG_IGN); /* parents interruptibility */ 763 (void) sigset(SIGINT, parintr); /* ... restore */ 764 765 # ifdef COHERENT 766 if (loginsh) /* it seems that SIGTERM is always set to SIG_IGN by */ 767 /* init/getty so it should be set to SIG_DFL - there may be */ 768 /* a better fix for this. */ 769 parterm = SIG_DFL; 770 else 771 # else /* !COHERENT */ 772 parterm = signal(SIGTERM, SIG_IGN); /* parents terminability */ 773 # endif /* COHERENT */ 774 (void) sigset(SIGTERM, parterm); /* ... restore */ 775 776 #endif /* BSDSIGS */ 777 778 779 #ifdef TCF 780 /* Enable process migration on ourselves and our progeny */ 781 (void) signal(SIGMIGRATE, SIG_DFL); 782 #endif /* TCF */ 783 784 /* 785 * dspkanji/dspmbyte autosetting 786 */ 787 /* PATCH IDEA FROM Issei.Suzuki VERY THANKS */ 788 #if defined(DSPMBYTE) 789 #if defined(NLS) && defined(LC_CTYPE) 790 if (((tcp = setlocale(LC_CTYPE, NULL)) != NULL || (tcp = getenv("LANG")) != NULL) && !adrof(CHECK_MBYTEVAR)) { 791 #else 792 if ((tcp = getenv("LANG")) != NULL && !adrof(CHECK_MBYTEVAR)) { 793 #endif 794 autoset_dspmbyte(str2short(tcp)); 795 } 796 #if defined(WINNT_NATIVE) 797 else if (!adrof(CHECK_MBYTEVAR)) 798 nt_autoset_dspmbyte(); 799 #endif /* WINNT_NATIVE */ 800 #endif 801 802 /* 803 * Process the arguments. 804 * 805 * Note that processing of -v/-x is actually delayed till after script 806 * processing. 807 * 808 * We set the first character of our name to be '-' if we are a shell 809 * running interruptible commands. Many programs which examine ps'es 810 * use this to filter such shells out. 811 */ 812 argc--, tempv++; 813 while (argc > 0 && (tcp = tempv[0])[0] == '-' && 814 *++tcp != '\0' && !batch) { 815 do 816 switch (*tcp++) { 817 818 case 0: /* - Interruptible, no prompt */ 819 prompt = 0; 820 setintr = 1; 821 nofile = 1; 822 break; 823 824 case 'b': /* -b Next arg is input file */ 825 batch = 1; 826 break; 827 828 case 'c': /* -c Command input from arg */ 829 if (argc == 1) 830 xexit(0); 831 argc--, tempv++; 832 #ifdef M_XENIX 833 /* Xenix Vi bug: 834 it relies on a 7 bit environment (/bin/sh), so it 835 pass ascii arguments with the 8th bit set */ 836 if (!strcmp(argv[0], "sh")) 837 { 838 char *p; 839 840 for (p = tempv[0]; *p; ++p) 841 *p &= ASCII; 842 } 843 #endif 844 arginp = SAVE(tempv[0]); 845 846 /* 847 * we put the command into a variable 848 */ 849 if (arginp != NULL) 850 set(STRcommand, quote(Strsave(arginp)), VAR_READWRITE); 851 852 /* 853 * * Give an error on -c arguments that end in * backslash to 854 * ensure that you don't make * nonportable csh scripts. 855 */ 856 { 857 register int count; 858 859 cp = arginp + Strlen(arginp); 860 count = 0; 861 while (cp > arginp && *--cp == '\\') 862 ++count; 863 if ((count & 1) != 0) { 864 exiterr = 1; 865 stderror(ERR_ARGC); 866 } 867 } 868 prompt = 0; 869 nofile = 1; 870 break; 871 case 'd': /* -d Load directory stack from file */ 872 rdirs = 1; 873 break; 874 875 #ifdef apollo 876 case 'D': /* -D Define environment variable */ 877 { 878 register Char *dp; 879 880 cp = str2short(tcp); 881 if (dp = Strchr(cp, '=')) { 882 *dp++ = '\0'; 883 tsetenv(cp, dp); 884 } 885 else 886 tsetenv(cp, STRNULL); 887 } 888 *tcp = '\0'; /* done with this argument */ 889 break; 890 #endif /* apollo */ 891 892 case 'e': /* -e Exit on any error */ 893 exiterr = 1; 894 break; 895 896 case 'f': /* -f Fast start */ 897 fast = 1; 898 break; 899 900 case 'i': /* -i Interactive, even if !intty */ 901 intact = 1; 902 nofile = 1; 903 break; 904 905 case 'm': /* -m read .cshrc (from su) */ 906 mflag = 1; 907 break; 908 909 case 'n': /* -n Don't execute */ 910 noexec = 1; 911 break; 912 913 case 'q': /* -q (Undoc'd) ... die on quit */ 914 quitit = 1; 915 break; 916 917 case 's': /* -s Read from std input */ 918 nofile = 1; 919 break; 920 921 case 't': /* -t Read one line from input */ 922 onelflg = 2; 923 prompt = 0; 924 nofile = 1; 925 break; 926 927 case 'v': /* -v Echo hist expanded input */ 928 nverbose = 1; /* ... later */ 929 break; 930 931 case 'x': /* -x Echo just before execution */ 932 nexececho = 1; /* ... later */ 933 break; 934 935 case 'V': /* -V Echo hist expanded input */ 936 setNS(STRverbose); /* NOW! */ 937 break; 938 939 case 'X': /* -X Echo just before execution */ 940 setNS(STRecho); /* NOW! */ 941 break; 942 943 case 'F': /* Undocumented flag */ 944 /* 945 * This will cause children to be created using fork instead of 946 * vfork. 947 */ 948 use_fork = 1; 949 break; 950 951 case ' ': 952 case '\t': 953 /* 954 * for O/S's that don't do the argument parsing right in 955 * "#!/foo -f " scripts 956 */ 957 break; 958 959 default: /* Unknown command option */ 960 exiterr = 1; 961 stderror(ERR_TCSHUSAGE, tcp-1, progname); 962 break; 963 964 } while (*tcp); 965 tempv++, argc--; 966 } 967 968 if (quitit) /* With all due haste, for debugging */ 969 (void) signal(SIGQUIT, SIG_DFL); 970 971 /* 972 * Unless prevented by -, -c, -i, -s, or -t, if there are remaining 973 * arguments the first of them is the name of a shell file from which to 974 * read commands. 975 */ 976 if (nofile == 0 && argc > 0) { 977 nofile = open(tempv[0], O_RDONLY); 978 if (nofile < 0) { 979 child = 1; /* So this ... */ 980 /* ... doesn't return */ 981 stderror(ERR_SYSTEM, tempv[0], strerror(errno)); 982 } 983 if (ffile != NULL) 984 xfree((ptr_t) ffile); 985 dolzero = 1; 986 ffile = SAVE(tempv[0]); 987 /* 988 * Replace FSHIN. Handle /dev/std{in,out,err} specially 989 * since once they are closed we cannot open them again. 990 * In that case we use our own saved descriptors 991 */ 992 if ((SHIN = dmove(nofile, FSHIN)) < 0) 993 switch(nofile) { 994 case 0: 995 SHIN = FSHIN; 996 break; 997 case 1: 998 SHIN = FSHOUT; 999 break; 1000 case 2: 1001 SHIN = FSHDIAG; 1002 break; 1003 default: 1004 stderror(ERR_SYSTEM, tempv[0], strerror(errno)); 1005 break; 1006 } 1007 (void) close_on_exec(SHIN, 1); 1008 prompt = 0; 1009 /* argc not used any more */ tempv++; 1010 } 1011 1012 1013 /* 1014 * Consider input a tty if it really is or we are interactive. but not for 1015 * editing (christos) 1016 */ 1017 if (!(intty = isatty(SHIN))) { 1018 if (adrof(STRedit)) 1019 unsetv(STRedit); 1020 editing = 0; 1021 } 1022 intty |= intact; 1023 #ifndef convex 1024 if (intty || (intact && isatty(SHOUT))) { 1025 if (!batch && (uid != euid || gid != egid)) { 1026 errno = EACCES; 1027 child = 1; /* So this ... */ 1028 /* ... doesn't return */ 1029 stderror(ERR_SYSTEM, progname, strerror(errno)); 1030 } 1031 } 1032 #endif /* convex */ 1033 isoutatty = isatty(SHOUT); 1034 isdiagatty = isatty(SHDIAG); 1035 /* 1036 * Decide whether we should play with signals or not. If we are explicitly 1037 * told (via -i, or -) or we are a login shell (arg0 starts with -) or the 1038 * input and output are both the ttys("csh", or "csh</dev/ttyx>/dev/ttyx") 1039 * Note that in only the login shell is it likely that parent may have set 1040 * signals to be ignored 1041 */ 1042 if (loginsh || intact || (intty && isatty(SHOUT))) 1043 setintr = 1; 1044 settell(); 1045 /* 1046 * Save the remaining arguments in argv. 1047 */ 1048 setq(STRargv, blk2short(tempv), &shvhed, VAR_READWRITE); 1049 1050 /* 1051 * Set up the prompt. 1052 */ 1053 if (prompt) { 1054 if (tcsh) 1055 set(STRprompt, Strsave(STRdeftcshprompt), VAR_READWRITE); 1056 else 1057 set(STRprompt, Strsave(STRdefcshprompt), VAR_READWRITE); 1058 /* that's a meta-questionmark */ 1059 set(STRprompt2, Strsave(STRmquestion), VAR_READWRITE); 1060 set(STRprompt3, Strsave(STRKCORRECT), VAR_READWRITE); 1061 } 1062 1063 /* 1064 * If we are an interactive shell, then start fiddling with the signals; 1065 * this is a tricky game. 1066 */ 1067 shpgrp = mygetpgrp(); 1068 opgrp = tpgrp = -1; 1069 if (setintr) { 1070 signalfun_t osig; 1071 **argv = '-'; 1072 if (!quitit) /* Wary! */ 1073 (void) signal(SIGQUIT, SIG_IGN); 1074 (void) sigset(SIGINT, pintr); 1075 (void) sighold(SIGINT); 1076 (void) signal(SIGTERM, SIG_IGN); 1077 1078 /* 1079 * No reason I can see not to save history on all these events.. 1080 * Most usual occurrence is in a window system, where we're not a login 1081 * shell, but might as well be... (sg) 1082 * But there might be races when lots of shells exit together... 1083 * [this is also incompatible]. 1084 * We have to be mre careful here. If the parent wants to 1085 * ignore the signals then we leave them untouched... 1086 * We also only setup the handlers for shells that are trully 1087 * interactive. 1088 */ 1089 osig = signal(SIGHUP, phup); /* exit processing on HUP */ 1090 if (!loginsh && osig == SIG_IGN) 1091 (void) signal(SIGHUP, osig); 1092 #ifdef SIGXCPU 1093 osig = signal(SIGXCPU, phup); /* exit processing on XCPU */ 1094 if (!loginsh && osig == SIG_IGN) 1095 (void) signal(SIGXCPU, osig); 1096 #endif 1097 #ifdef SIGXFSZ 1098 osig = signal(SIGXFSZ, phup); /* exit processing on XFSZ */ 1099 if (!loginsh && osig == SIG_IGN) 1100 (void) signal(SIGXFSZ, osig); 1101 #endif 1102 1103 if (quitit == 0 && arginp == 0) { 1104 #ifdef SIGTSTP 1105 (void) signal(SIGTSTP, SIG_IGN); 1106 #endif 1107 #ifdef SIGTTIN 1108 (void) signal(SIGTTIN, SIG_IGN); 1109 #endif 1110 #ifdef SIGTTOU 1111 (void) signal(SIGTTOU, SIG_IGN); 1112 #endif 1113 /* 1114 * Wait till in foreground, in case someone stupidly runs csh & 1115 * dont want to try to grab away the tty. 1116 */ 1117 if (isatty(FSHDIAG)) 1118 f = FSHDIAG; 1119 else if (isatty(FSHOUT)) 1120 f = FSHOUT; 1121 else if (isatty(OLDSTD)) 1122 f = OLDSTD; 1123 else 1124 f = -1; 1125 1126 #ifdef NeXT 1127 /* NeXT 2.0 /usr/etc/rlogind, does not set our process group! */ 1128 if (shpgrp == 0) { 1129 shpgrp = getpid(); 1130 (void) setpgid(0, shpgrp); 1131 (void) tcsetpgrp(f, shpgrp); 1132 } 1133 #endif /* NeXT */ 1134 #ifdef BSDJOBS /* if we have tty job control */ 1135 retry: 1136 if ((tpgrp = tcgetpgrp(f)) != -1) { 1137 if (tpgrp != shpgrp) { 1138 signalfun_t old = signal(SIGTTIN, SIG_DFL); 1139 (void) kill(0, SIGTTIN); 1140 (void) signal(SIGTTIN, old); 1141 goto retry; 1142 } 1143 /* 1144 * Thanks to Matt Day for the POSIX references, and to 1145 * Paul Close for the SGI clarification. 1146 */ 1147 if (setdisc(f) != -1) { 1148 opgrp = shpgrp; 1149 shpgrp = getpid(); 1150 tpgrp = shpgrp; 1151 if (tcsetpgrp(f, shpgrp) == -1) { 1152 /* 1153 * On hpux 7.03 this fails with EPERM. This happens on 1154 * the 800 when opgrp != shpgrp at this point. (we were 1155 * forked from a non job control shell) 1156 * POSIX 7.2.4, says we failed because the process 1157 * group specified did not belong to a process 1158 * in the same session with the tty. So we set our 1159 * process group and try again. 1160 */ 1161 if (setpgid(0, shpgrp) == -1) { 1162 xprintf("setpgid:"); 1163 goto notty; 1164 } 1165 if (tcsetpgrp(f, shpgrp) == -1) { 1166 xprintf("tcsetpgrp:"); 1167 goto notty; 1168 } 1169 } 1170 /* 1171 * We check the process group now. If it is the same, then 1172 * we don't need to set it again. On hpux 7.0 on the 300's 1173 * if we set it again it fails with EPERM. This is the 1174 * correct behavior according to POSIX 4.3.3 if the process 1175 * was a session leader . 1176 */ 1177 else if (shpgrp != mygetpgrp()) { 1178 if(setpgid(0, shpgrp) == -1) { 1179 xprintf("setpgid:"); 1180 goto notty; 1181 } 1182 } 1183 #ifdef IRIS4D 1184 /* 1185 * But on irix 3.3 we need to set it again, even if it is 1186 * the same. We do that to tell the system that we 1187 * need BSD process group compatibility. 1188 */ 1189 else 1190 (void) setpgid(0, shpgrp); 1191 #endif 1192 (void) close_on_exec(dcopy(f, FSHTTY), 1); 1193 } 1194 else 1195 tpgrp = -1; 1196 } 1197 if (tpgrp == -1) { 1198 notty: 1199 xprintf(CGETS(11, 1, "Warning: no access to tty (%s).\n"), 1200 strerror(errno)); 1201 xprintf(CGETS(11, 2, "Thus no job control in this shell.\n")); 1202 /* 1203 * Fix from:Sakari Jalovaara <sja@sirius.hut.fi> if we don't 1204 * have access to tty, disable editing too 1205 */ 1206 if (adrof(STRedit)) 1207 unsetv(STRedit); 1208 editing = 0; 1209 } 1210 #else /* BSDJOBS */ /* don't have job control, so frotz it */ 1211 tpgrp = -1; 1212 #endif /* BSDJOBS */ 1213 } 1214 } 1215 if ((setintr == 0) && (parintr == SIG_DFL)) 1216 setintr = 1; 1217 1218 /* 1219 * SVR4 doesn't send a SIGCHLD when a child is stopped or continued if the 1220 * handler is installed with signal(2) or sigset(2). sigaction(2) must 1221 * be used instead. 1222 * 1223 * David Dawes (dawes@physics.su.oz.au) Sept 1991 1224 */ 1225 1226 #if SYSVREL > 3 1227 { 1228 struct sigaction act; 1229 act.sa_handler=pchild; 1230 (void) sigemptyset(&(act.sa_mask)); /* Don't block any extra sigs 1231 * when the handler is called 1232 */ 1233 act.sa_flags=0; /* want behaviour of sigset() without 1234 * SA_NOCLDSTOP 1235 */ 1236 1237 if ((sigaction(SIGCHLD,&act,(struct sigaction *)NULL)) == -1) 1238 stderror(ERR_SYSTEM, "sigaction", strerror(errno)); 1239 } 1240 #else /* SYSVREL <= 3 */ 1241 (void) sigset(SIGCHLD, pchild); /* while signals not ready */ 1242 #endif /* SYSVREL <= 3 */ 1243 1244 1245 if (intty && !arginp) 1246 (void) ed_Setup(editing);/* Get the tty state, and set defaults */ 1247 /* Only alter the tty state if editing */ 1248 1249 /* 1250 * Set an exit here in case of an interrupt or error reading the shell 1251 * start-up scripts. 1252 */ 1253 reenter = setexit(); /* PWP */ 1254 exitset++; 1255 haderr = 0; /* In case second time through */ 1256 if (!fast && reenter == 0) { 1257 /* Will have varval(STRhome) here because set fast if don't */ 1258 { 1259 int osetintr = setintr; 1260 signalfun_t oparintr = parintr; 1261 1262 #ifdef BSDSIGS 1263 sigmask_t omask = sigblock(sigmask(SIGINT)); 1264 #else 1265 (void) sighold(SIGINT); 1266 #endif 1267 setintr = 0; 1268 parintr = SIG_IGN; /* onintr in /etc/ files has no effect */ 1269 #ifdef LOGINFIRST 1270 #ifdef _PATH_DOTLOGIN 1271 if (loginsh) 1272 (void) srcfile(_PATH_DOTLOGIN, 0, 0, NULL); 1273 #endif 1274 #endif 1275 1276 #ifdef _PATH_DOTCSHRC 1277 (void) srcfile(_PATH_DOTCSHRC, 0, 0, NULL); 1278 #endif 1279 if (!arginp && !onelflg && !havhash) 1280 dohash(NULL,NULL); 1281 #ifndef LOGINFIRST 1282 #ifdef _PATH_DOTLOGIN 1283 if (loginsh) 1284 (void) srcfile(_PATH_DOTLOGIN, 0, 0, NULL); 1285 #endif 1286 #endif 1287 #ifdef BSDSIGS 1288 (void) sigsetmask(omask); 1289 #else 1290 (void) sigrelse(SIGINT); 1291 #endif 1292 setintr = osetintr; 1293 parintr = oparintr; 1294 } 1295 #ifdef LOGINFIRST 1296 if (loginsh) 1297 (void) srccat(varval(STRhome), STRsldotlogin); 1298 #endif 1299 /* upward compat. */ 1300 if (!srccat(varval(STRhome), STRsldottcshrc)) 1301 (void) srccat(varval(STRhome), STRsldotcshrc); 1302 1303 if (!fast && !arginp && !onelflg && !havhash) 1304 dohash(NULL,NULL); 1305 1306 /* 1307 * Source history before .login so that it is available in .login 1308 */ 1309 loadhist(NULL, 0); 1310 #ifndef LOGINFIRST 1311 if (loginsh) 1312 (void) srccat(varval(STRhome), STRsldotlogin); 1313 #endif 1314 if (!fast && (loginsh || rdirs)) 1315 loaddirs(NULL); 1316 } 1317 /* Initing AFTER .cshrc is the Right Way */ 1318 if (intty && !arginp) { /* PWP setup stuff */ 1319 ed_Init(); /* init the new line editor */ 1320 #ifdef SIG_WINDOW 1321 check_window_size(1); /* mung environment */ 1322 #endif /* SIG_WINDOW */ 1323 } 1324 1325 /* 1326 * Now are ready for the -v and -x flags 1327 */ 1328 if (nverbose) 1329 setNS(STRverbose); 1330 if (nexececho) 1331 setNS(STRecho); 1332 1333 /* 1334 * All the rest of the world is inside this call. The argument to process 1335 * indicates whether it should catch "error unwinds". Thus if we are a 1336 * interactive shell our call here will never return by being blown past on 1337 * an error. 1338 */ 1339 process(setintr); 1340 1341 /* 1342 * Mop-up. 1343 */ 1344 if (intty) { 1345 if (loginsh) { 1346 xprintf("logout\n"); 1347 (void) close(SHIN); 1348 child = 1; 1349 #ifdef TESLA 1350 do_logout = 1; 1351 #endif /* TESLA */ 1352 goodbye(NULL, NULL); 1353 } 1354 else { 1355 xprintf("exit\n"); 1356 } 1357 } 1358 record(); 1359 exitstat(); 1360 return (0); 1361 } 1362 1363 void 1364 untty() 1365 { 1366 #ifdef BSDJOBS 1367 if (tpgrp > 0 && opgrp != shpgrp) { 1368 (void) setpgid(0, opgrp); 1369 (void) tcsetpgrp(FSHTTY, opgrp); 1370 (void) resetdisc(FSHTTY); 1371 } 1372 #endif /* BSDJOBS */ 1373 } 1374 1375 void 1376 importpath(cp) 1377 Char *cp; 1378 { 1379 register int i = 0; 1380 register Char *dp; 1381 register Char **pv; 1382 int c; 1383 1384 for (dp = cp; *dp; dp++) 1385 if (*dp == PATHSEP) 1386 i++; 1387 /* 1388 * i+2 where i is the number of colons in the path. There are i+1 1389 * directories in the path plus we need room for a zero terminator. 1390 */ 1391 pv = (Char **) xcalloc((size_t) (i + 2), sizeof(Char *)); 1392 dp = cp; 1393 i = 0; 1394 if (*dp) 1395 for (;;) { 1396 if ((c = *dp) == PATHSEP || c == 0) { 1397 *dp = 0; 1398 pv[i++] = Strsave(*cp ? cp : STRdot); 1399 if (c) { 1400 cp = dp + 1; 1401 *dp = PATHSEP; 1402 } 1403 else 1404 break; 1405 } 1406 #ifdef WINNT_NATIVE 1407 else if (*dp == '\\') 1408 *dp = '/'; 1409 #endif /* WINNT_NATIVE */ 1410 dp++; 1411 } 1412 pv[i] = 0; 1413 setq(STRpath, pv, &shvhed, VAR_READWRITE); 1414 } 1415 1416 /* 1417 * Source to the file which is the catenation of the argument names. 1418 */ 1419 static int 1420 srccat(cp, dp) 1421 Char *cp, *dp; 1422 { 1423 if (cp[0] == '/' && cp[1] == '\0') 1424 return srcfile(short2str(dp), (mflag ? 0 : 1), 0, NULL); 1425 else { 1426 register Char *ep; 1427 char *ptr; 1428 int rv; 1429 1430 #ifdef WINNT_NATIVE 1431 ep = cp; 1432 while(*ep) 1433 ep++; 1434 if (ep[-1] == '/' && dp[0] == '/') /* silly win95 */ 1435 dp++; 1436 #endif /* WINNT_NATIVE */ 1437 1438 ep = Strspl(cp, dp); 1439 ptr = short2str(ep); 1440 1441 rv = srcfile(ptr, (mflag ? 0 : 1), 0, NULL); 1442 xfree((ptr_t) ep); 1443 return rv; 1444 } 1445 } 1446 1447 /* 1448 * Source to a file putting the file descriptor in a safe place (> 2). 1449 */ 1450 #ifndef WINNT_NATIVE 1451 static int 1452 #else 1453 int 1454 #endif /*WINNT_NATIVE*/ 1455 srcfile(f, onlyown, flag, av) 1456 char *f; 1457 bool onlyown; 1458 int flag; 1459 Char **av; 1460 { 1461 register int unit; 1462 1463 if ((unit = open(f, O_RDONLY)) == -1) 1464 return 0; 1465 unit = dmove(unit, -1); 1466 1467 (void) close_on_exec(unit, 1); 1468 srcunit(unit, onlyown, flag, av); 1469 return 1; 1470 } 1471 1472 1473 /* 1474 * Save the shell state, and establish new argument vector, and new input 1475 * fd. 1476 */ 1477 static void 1478 st_save(st, unit, hflg, al, av) 1479 struct saved_state *st; 1480 int unit, hflg; 1481 Char **al, **av; 1482 { 1483 st->insource = insource; 1484 st->SHIN = SHIN; 1485 st->intty = intty; 1486 st->whyles = whyles; 1487 st->gointr = gointr; 1488 st->arginp = arginp; 1489 st->evalp = evalp; 1490 st->evalvec = evalvec; 1491 st->alvecp = alvecp; 1492 st->alvec = alvec; 1493 st->onelflg = onelflg; 1494 st->enterhist = enterhist; 1495 if (hflg) 1496 st->HIST = HIST; 1497 else 1498 st->HIST = '\0'; 1499 st->cantell = cantell; 1500 cpybin(st->B, B); 1501 1502 /* 1503 * we can now pass arguments to source. 1504 * For compatibility we do that only if arguments were really 1505 * passed, otherwise we keep the old, global $argv like before. 1506 */ 1507 if (av != NULL && *av != NULL) { 1508 struct varent *vp; 1509 if ((vp = adrof(STRargv)) != NULL) 1510 st->argv = saveblk(vp->vec); 1511 else 1512 st->argv = NULL; 1513 setq(STRargv, saveblk(av), &shvhed, VAR_READWRITE); 1514 } 1515 else 1516 st->argv = NULL; 1517 1518 SHIN = unit; /* Do this first */ 1519 1520 /* Establish new input arena */ 1521 { 1522 fbuf = NULL; 1523 fseekp = feobp = fblocks = 0; 1524 settell(); 1525 } 1526 1527 arginp = 0; 1528 onelflg = 0; 1529 intty = isatty(SHIN); 1530 whyles = 0; 1531 gointr = 0; 1532 evalvec = 0; 1533 evalp = 0; 1534 alvec = al; 1535 alvecp = 0; 1536 enterhist = hflg; 1537 if (enterhist) 1538 HIST = '\0'; 1539 insource = 1; 1540 } 1541 1542 1543 /* 1544 * Restore the shell to a saved state 1545 */ 1546 static void 1547 st_restore(st, av) 1548 struct saved_state *st; 1549 Char **av; 1550 { 1551 if (st->SHIN == -1) 1552 return; 1553 1554 /* Reset input arena */ 1555 { 1556 register int i; 1557 register Char** nfbuf = fbuf; 1558 register int nfblocks = fblocks; 1559 1560 fblocks = 0; 1561 fbuf = NULL; 1562 for (i = 0; i < nfblocks; i++) 1563 xfree((ptr_t) nfbuf[i]); 1564 xfree((ptr_t) nfbuf); 1565 } 1566 cpybin(B, st->B); 1567 1568 (void) close(SHIN); 1569 1570 insource = st->insource; 1571 SHIN = st->SHIN; 1572 arginp = st->arginp; 1573 onelflg = st->onelflg; 1574 evalp = st->evalp; 1575 evalvec = st->evalvec; 1576 alvecp = st->alvecp; 1577 alvec = st->alvec; 1578 intty = st->intty; 1579 whyles = st->whyles; 1580 gointr = st->gointr; 1581 if (st->HIST != '\0') 1582 HIST = st->HIST; 1583 enterhist = st->enterhist; 1584 cantell = st->cantell; 1585 1586 if (st->argv != NULL) 1587 setq(STRargv, st->argv, &shvhed, VAR_READWRITE); 1588 else if (av != NULL && *av != NULL && adrof(STRargv) != NULL) 1589 unsetv(STRargv); 1590 } 1591 1592 /* 1593 * Source to a unit. If onlyown it must be our file or our group or 1594 * we don't chance it. This occurs on ".cshrc"s and the like. 1595 */ 1596 static void 1597 srcunit(unit, onlyown, hflg, av) 1598 register int unit; 1599 bool onlyown; 1600 int hflg; 1601 Char **av; 1602 { 1603 struct saved_state st; 1604 st.SHIN = -1; /* st_restore checks this */ 1605 1606 if (unit < 0) 1607 return; 1608 1609 if (didfds) 1610 donefds(); 1611 1612 if (onlyown) { 1613 struct stat stb; 1614 1615 if (fstat(unit, &stb) < 0) { 1616 (void) close(unit); 1617 return; 1618 } 1619 } 1620 1621 getexit(st.oldexit); 1622 1623 if (setintr) 1624 #ifdef BSDSIGS 1625 st.mask = sigblock(sigmask(SIGINT)); 1626 #else 1627 (void) sighold(SIGINT); 1628 #endif 1629 1630 /* Save the current state and move us to a new state */ 1631 st_save(&st, unit, hflg, NULL, av); 1632 1633 /* 1634 * Now if we are allowing commands to be interrupted, we let ourselves be 1635 * interrupted. 1636 */ 1637 if (setintr) 1638 #ifdef BSDSIGS 1639 (void) sigsetmask(st.mask); 1640 #else 1641 (void) sigrelse(SIGINT); 1642 #endif 1643 1644 /* 1645 * Bugfix for running out of memory by: Jak Kirman 1646 * <jak%cs.brown.edu@RELAY.CS.NET>. Solution: pay attention to what 1647 * setexit() is returning because reenter _may_ be in a register, and 1648 * thus restored to 0 on a longjump(). (PWP: insert flames about 1649 * compiler-dependant code here) PWP: THANKS LOTS !!! 1650 * 1651 * PWP: think of this as like a LISP (unwind-protect ...) 1652 * thanks to Diana Smetters for pointing out how this _should_ be written 1653 */ 1654 #ifdef cray 1655 st.reenter = 1; /* assume non-zero return val */ 1656 if (setexit() == 0) { 1657 st.reenter = 0; /* Oh well, we were wrong */ 1658 #else 1659 if ((st.reenter = setexit()) == 0) { 1660 #endif 1661 process(0); /* 0 -> blow away on errors */ 1662 } 1663 1664 if (setintr) 1665 #ifdef BSDSIGS 1666 (void) sigsetmask(st.mask); 1667 #else 1668 (void) sigrelse(SIGINT); 1669 #endif 1670 1671 /* Restore the old state */ 1672 st_restore(&st, av); 1673 resexit(st.oldexit); 1674 /* 1675 * If process reset() (effectively an unwind) then we must also unwind. 1676 */ 1677 if (st.reenter) 1678 stderror(ERR_SILENT); 1679 } 1680 1681 1682 /*ARGSUSED*/ 1683 void 1684 goodbye(v, c) 1685 Char **v; 1686 struct command *c; 1687 { 1688 USE(c); 1689 record(); 1690 1691 if (loginsh) { 1692 (void) sigset(SIGQUIT, SIG_IGN); 1693 (void) sigset(SIGINT, SIG_IGN); 1694 (void) sigset(SIGTERM, SIG_IGN); 1695 (void) sigset(SIGHUP, SIG_IGN); 1696 setintr = 0; /* No interrupts after "logout" */ 1697 /* Trap errors inside .logout */ 1698 reenter = setexit(); 1699 if (reenter != 0) 1700 exitstat(); 1701 if (!(adrof(STRlogout))) 1702 set(STRlogout, Strsave(STRnormal), VAR_READWRITE); 1703 #ifdef _PATH_DOTLOGOUT 1704 (void) srcfile(_PATH_DOTLOGOUT, 0, 0, NULL); 1705 #endif 1706 if (adrof(STRhome)) 1707 (void) srccat(varval(STRhome), STRsldtlogout); 1708 #ifdef TESLA 1709 do_logout = 1; 1710 #endif /* TESLA */ 1711 } 1712 exitstat(); 1713 } 1714 1715 void 1716 exitstat() 1717 { 1718 #ifdef PROF 1719 monitor(0); 1720 #endif 1721 /* 1722 * Note that if STATUS is corrupted (i.e. getn bombs) then error will exit 1723 * directly because we poke child here. Otherwise we might continue 1724 * unwarrantedly (sic). 1725 */ 1726 child = 1; 1727 1728 xexit(getn(varval(STRstatus))); 1729 } 1730 1731 /* 1732 * in the event of a HUP we want to save the history 1733 */ 1734 static sigret_t 1735 phup(snum) 1736 int snum; 1737 { 1738 /* 1739 * There is no return from here, 1740 * so we are not going to release SIGHUP 1741 * anymore 1742 */ 1743 #ifdef UNRELSIGS 1744 if (snum) 1745 (void) sigset(snum, SIG_IGN); 1746 #else 1747 # ifdef BSDSIGS 1748 (void) sigblock(sigmask(SIGHUP)); 1749 # else 1750 (void) sighold(SIGHUP); 1751 # endif /* BSDSIGS */ 1752 #endif /* UNRELSIGS */ 1753 1754 if (loginsh) { 1755 set(STRlogout, Strsave(STRhangup), VAR_READWRITE); 1756 #ifdef _PATH_DOTLOGOUT 1757 (void) srcfile(_PATH_DOTLOGOUT, 0, 0, NULL); 1758 #endif 1759 if (adrof(STRhome)) 1760 (void) srccat(varval(STRhome), STRsldtlogout); 1761 } 1762 1763 record(); 1764 1765 #ifdef POSIXJOBS 1766 /* 1767 * We kill the last foreground process group. It then becomes 1768 * responsible to propagate the SIGHUP to its progeny. 1769 */ 1770 { 1771 struct process *pp, *np; 1772 1773 for (pp = proclist.p_next; pp; pp = pp->p_next) { 1774 np = pp; 1775 /* 1776 * Find if this job is in the foreground. It could be that 1777 * the process leader has exited and the foreground flag 1778 * is cleared for it. 1779 */ 1780 do 1781 /* 1782 * If a process is in the foreground we try to kill 1783 * it's process group. If we succeed, then the 1784 * whole job is gone. Otherwise we keep going... 1785 * But avoid sending HUP to the shell again. 1786 */ 1787 if (((np->p_flags & PFOREGND) != 0) && np->p_jobid != shpgrp) { 1788 np->p_flags &= ~PHUP; 1789 if (killpg(np->p_jobid, SIGHUP) != -1) { 1790 /* In case the job was suspended... */ 1791 #ifdef SIGCONT 1792 (void) killpg(np->p_jobid, SIGCONT); 1793 #endif 1794 break; 1795 } 1796 } 1797 while ((np = np->p_friends) != pp); 1798 } 1799 } 1800 #endif /* POSIXJOBS */ 1801 1802 xexit(snum); 1803 #ifndef SIGVOID 1804 return (snum); 1805 #endif 1806 } 1807 1808 static Char *jobargv[2] = {STRjobs, 0}; 1809 1810 /* 1811 * Catch an interrupt, e.g. during lexical input. 1812 * If we are an interactive shell, we reset the interrupt catch 1813 * immediately. In any case we drain the shell output, 1814 * and finally go through the normal error mechanism, which 1815 * gets a chance to make the shell go away. 1816 */ 1817 int just_signaled; /* bugfix by Michael Bloom (mg@ttidca.TTI.COM) */ 1818 1819 #ifdef SIGVOID 1820 /*ARGSUSED*/ 1821 #endif 1822 sigret_t 1823 pintr(snum) 1824 int snum; 1825 { 1826 #ifdef UNRELSIGS 1827 if (snum) 1828 (void) sigset(snum, pintr); 1829 #endif /* UNRELSIGS */ 1830 just_signaled = 1; 1831 pintr1(1); 1832 #ifndef SIGVOID 1833 return (snum); 1834 #endif 1835 } 1836 1837 void 1838 pintr1(wantnl) 1839 bool wantnl; 1840 { 1841 register Char **v; 1842 #ifdef BSDSIGS 1843 sigmask_t omask; 1844 #endif 1845 1846 #ifdef BSDSIGS 1847 omask = sigblock((sigmask_t) 0); 1848 #endif 1849 if (setintr) { 1850 #ifdef BSDSIGS 1851 (void) sigsetmask(omask & ~sigmask(SIGINT)); 1852 #else 1853 (void) sigrelse(SIGINT); 1854 #endif 1855 if (pjobs) { 1856 pjobs = 0; 1857 xputchar('\n'); 1858 dojobs(jobargv, NULL); 1859 stderror(ERR_NAME | ERR_INTR); 1860 } 1861 } 1862 /* MH - handle interrupted completions specially */ 1863 { 1864 extern int InsideCompletion; 1865 1866 if (InsideCompletion) 1867 stderror(ERR_SILENT); 1868 } 1869 /* JV - Make sure we shut off inputl */ 1870 { 1871 extern Char GettingInput; 1872 1873 (void) Cookedmode(); 1874 GettingInput = 0; 1875 } 1876 #ifdef BSDSIGS 1877 (void) sigsetmask(omask & ~sigmask(SIGCHLD)); 1878 #else 1879 if (setintr) 1880 (void) sighold(SIGINT); 1881 (void) sigrelse(SIGCHLD); 1882 #endif 1883 drainoline(); 1884 #if !defined(_VMS_POSIX) && !defined(WINNT_NATIVE) 1885 (void) endpwent(); 1886 #endif /* !_VMS_POSIX && !WINNT_NATIVE */ 1887 1888 /* 1889 * If we have an active "onintr" then we search for the label. Note that if 1890 * one does "onintr -" then we shan't be interruptible so we needn't worry 1891 * about that here. 1892 */ 1893 if (gointr) { 1894 gotolab(gointr); 1895 timflg = 0; 1896 if ((v = pargv) != 0) 1897 pargv = 0, blkfree(v); 1898 if ((v = gargv) != 0) 1899 gargv = 0, blkfree(v); 1900 reset(); 1901 } 1902 else if (intty && wantnl) { 1903 if (editing) { 1904 /* 1905 * If we are editing a multi-line input command, and move to 1906 * the beginning of the line, we don't want to trash it when 1907 * we hit ^C 1908 */ 1909 PastBottom(); 1910 ClearLines(); 1911 ClearDisp(); 1912 } 1913 else { 1914 /* xputchar('\n'); *//* Some like this, others don't */ 1915 (void) putraw('\r'); 1916 (void) putraw('\n'); 1917 } 1918 } 1919 stderror(ERR_SILENT); 1920 } 1921 1922 /* 1923 * Process is the main driving routine for the shell. 1924 * It runs all command processing, except for those within { ... } 1925 * in expressions (which is run by a routine evalav in sh.exp.c which 1926 * is a stripped down process), and `...` evaluation which is run 1927 * also by a subset of this code in sh.glob.c in the routine backeval. 1928 * 1929 * The code here is a little strange because part of it is interruptible 1930 * and hence freeing of structures appears to occur when none is necessary 1931 * if this is ignored. 1932 * 1933 * Note that if catch is not set then we will unwind on any error. 1934 * If an end-of-file occurs, we return. 1935 */ 1936 static struct command *savet = NULL; 1937 void 1938 process(catch) 1939 bool catch; 1940 { 1941 extern char Expand; 1942 jmp_buf_t osetexit; 1943 /* PWP: This might get nuked my longjmp so don't make it a register var */ 1944 struct command *t = savet; 1945 1946 savet = NULL; 1947 getexit(osetexit); 1948 for (;;) { 1949 1950 pendjob(); 1951 1952 /* This was leaking memory badly, particularly when sourcing 1953 * files, etc.. For whatever reason we were arriving here with 1954 * allocated pointers still active, and the code was simply 1955 * overwriting them. I can't say I fully understand the 1956 * control flow here, but according to Purify this particular 1957 * leak has been plugged, and I haven't noticed any ill 1958 * effects.. (sg) 1959 */ 1960 if (paraml.next && paraml.next != ¶ml) 1961 freelex(¶ml); 1962 1963 paraml.next = paraml.prev = ¶ml; 1964 paraml.word = STRNULL; 1965 (void) setexit(); 1966 justpr = enterhist; /* execute if not entering history */ 1967 1968 /* 1969 * Interruptible during interactive reads 1970 */ 1971 if (setintr) 1972 #ifdef BSDSIGS 1973 (void) sigsetmask(sigblock((sigmask_t) 0) & ~sigmask(SIGINT)); 1974 #else 1975 (void) sigrelse(SIGINT); 1976 #endif 1977 1978 1979 /* 1980 * For the sake of reset() 1981 */ 1982 freelex(¶ml); 1983 if (savet) 1984 freesyn(savet), savet = NULL; 1985 1986 if (haderr) { 1987 if (!catch) { 1988 /* unwind */ 1989 doneinp = 0; 1990 savet = t; 1991 resexit(osetexit); 1992 reset(); 1993 } 1994 haderr = 0; 1995 /* 1996 * Every error is eventually caught here or the shell dies. It is 1997 * at this point that we clean up any left-over open files, by 1998 * closing all but a fixed number of pre-defined files. Thus 1999 * routines don't have to worry about leaving files open due to 2000 * deeper errors... they will get closed here. 2001 */ 2002 closem(); 2003 continue; 2004 } 2005 if (doneinp) { 2006 doneinp = 0; 2007 break; 2008 } 2009 if (chkstop) 2010 chkstop--; 2011 if (neednote) 2012 pnote(); 2013 if (intty && prompt && evalvec == 0) { 2014 just_signaled = 0; 2015 mailchk(); 2016 /* 2017 * Watch for logins/logouts. Next is scheduled commands stored 2018 * previously using "sched." Then execute periodic commands. 2019 * Following that, the prompt precmd is run. 2020 */ 2021 #ifndef HAVENOUTMP 2022 watch_login(0); 2023 #endif /* !HAVENOUTMP */ 2024 sched_run(0); 2025 period_cmd(); 2026 precmd(); 2027 /* 2028 * If we are at the end of the input buffer then we are going to 2029 * read fresh stuff. Otherwise, we are rereading input and don't 2030 * need or want to prompt. 2031 */ 2032 if (fseekp == feobp && aret == TCSH_F_SEEK) 2033 printprompt(0, NULL); 2034 flush(); 2035 setalarm(1); 2036 } 2037 if (seterr) { 2038 xfree((ptr_t) seterr); 2039 seterr = NULL; 2040 } 2041 2042 /* 2043 * Echo not only on VERBOSE, but also with history expansion. If there 2044 * is a lexical error then we forego history echo. 2045 */ 2046 if ((lex(¶ml) && !seterr && intty && !tellwhat && !Expand && 2047 !whyles) || adrof(STRverbose)) { 2048 haderr = 1; 2049 prlex(¶ml); 2050 haderr = 0; 2051 } 2052 (void) alarm(0); /* Autologout OFF */ 2053 2054 /* 2055 * The parser may lose space if interrupted. 2056 */ 2057 if (setintr) 2058 #ifdef BSDSIGS 2059 (void) sigblock(sigmask(SIGINT)); 2060 #else 2061 (void) sighold(SIGINT); 2062 #endif 2063 2064 /* 2065 * Save input text on the history list if reading in old history, or it 2066 * is from the terminal at the top level and not in a loop. 2067 * 2068 * PWP: entry of items in the history list while in a while loop is done 2069 * elsewhere... 2070 */ 2071 if (enterhist || (catch && intty && !whyles && !tellwhat && !arun)) 2072 savehist(¶ml, enterhist > 1); 2073 2074 if (Expand && seterr) 2075 Expand = 0; 2076 2077 /* 2078 * Print lexical error messages, except when sourcing history lists. 2079 */ 2080 if (!enterhist && seterr) 2081 stderror(ERR_OLD); 2082 2083 /* 2084 * If had a history command :p modifier then this is as far as we 2085 * should go 2086 */ 2087 if (justpr) 2088 reset(); 2089 2090 /* 2091 * If had a tellwhat from twenex() then do 2092 */ 2093 if (tellwhat) { 2094 (void) tellmewhat(¶ml, NULL); 2095 reset(); 2096 } 2097 2098 alias(¶ml); 2099 2100 #ifdef BSDJOBS 2101 /* 2102 * If we are interactive, try to continue jobs that we have stopped 2103 */ 2104 if (prompt) 2105 continue_jobs(¶ml); 2106 #endif /* BSDJOBS */ 2107 2108 /* 2109 * Check to see if the user typed "rm * .o" or something 2110 */ 2111 if (prompt) 2112 rmstar(¶ml); 2113 /* 2114 * Parse the words of the input into a parse tree. 2115 */ 2116 savet = syntax(paraml.next, ¶ml, 0); 2117 if (seterr) 2118 stderror(ERR_OLD); 2119 2120 postcmd(); 2121 /* 2122 * Execute the parse tree From: Michael Schroeder 2123 * <mlschroe@immd4.informatik.uni-erlangen.de> was execute(t, tpgrp); 2124 */ 2125 execute(savet, (tpgrp > 0 ? tpgrp : -1), NULL, NULL); 2126 2127 /* 2128 * Made it! 2129 */ 2130 freelex(¶ml); 2131 freesyn(savet), savet = NULL; 2132 #ifdef SIG_WINDOW 2133 if (catch && intty && !whyles && !tellwhat) 2134 (void) window_change(0); /* for window systems */ 2135 #endif /* SIG_WINDOW */ 2136 set(STR_, Strsave(InputBuf), VAR_READWRITE | VAR_NOGLOB); 2137 } 2138 savet = t; 2139 resexit(osetexit); 2140 } 2141 2142 /*ARGSUSED*/ 2143 void 2144 dosource(t, c) 2145 register Char **t; 2146 struct command *c; 2147 { 2148 register Char *f; 2149 bool hflg = 0; 2150 extern int bequiet; 2151 char buf[BUFSIZE]; 2152 2153 USE(c); 2154 t++; 2155 if (*t && eq(*t, STRmh)) { 2156 if (*++t == NULL) 2157 stderror(ERR_NAME | ERR_HFLAG); 2158 hflg++; 2159 } 2160 else if (*t && eq(*t, STRmm)) { 2161 if (*++t == NULL) 2162 stderror(ERR_NAME | ERR_MFLAG); 2163 hflg = 2; 2164 } 2165 2166 f = globone(*t++, G_ERROR); 2167 (void) strcpy(buf, short2str(f)); 2168 xfree((ptr_t) f); 2169 if ((!srcfile(buf, 0, hflg, t)) && (!hflg) && (!bequiet)) 2170 stderror(ERR_SYSTEM, buf, strerror(errno)); 2171 } 2172 2173 /* 2174 * Check for mail. 2175 * If we are a login shell, then we don't want to tell 2176 * about any mail file unless its been modified 2177 * after the time we started. 2178 * This prevents us from telling the user things he already 2179 * knows, since the login program insists on saying 2180 * "You have mail." 2181 */ 2182 2183 /* 2184 * The AMS version. 2185 * This version checks if the file is a directory, and if so, 2186 * tells you the number of files in it, otherwise do the old thang. 2187 * The magic "+1" in the time calculation is to compensate for 2188 * an AFS bug where directory mtimes are set to 1 second in 2189 * the future. 2190 */ 2191 2192 static void 2193 mailchk() 2194 { 2195 register struct varent *v; 2196 register Char **vp; 2197 time_t t; 2198 int intvl, cnt; 2199 struct stat stb; 2200 bool new; 2201 2202 v = adrof(STRmail); 2203 if (v == 0) 2204 return; 2205 (void) time(&t); 2206 vp = v->vec; 2207 cnt = blklen(vp); 2208 intvl = (cnt && number(*vp)) ? (--cnt, getn(*vp++)) : MAILINTVL; 2209 if (intvl < 1) 2210 intvl = 1; 2211 if (chktim + intvl > t) 2212 return; 2213 for (; *vp; vp++) { 2214 char *filename = short2str(*vp); 2215 char *mboxdir = filename; 2216 2217 if (stat(filename, &stb) < 0) 2218 continue; 2219 #if defined(BSDTIMES) || defined(_SEQUENT_) 2220 new = stb.st_mtime > time0.tv_sec; 2221 #else 2222 new = stb.st_mtime > seconds0; 2223 #endif 2224 if (S_ISDIR(stb.st_mode)) { 2225 DIR *mailbox; 2226 int mailcount = 0; 2227 char tempfilename[MAXPATHLEN]; 2228 struct stat stc; 2229 2230 xsnprintf(tempfilename, MAXPATHLEN, "%s/new", filename); 2231 2232 if (stat(tempfilename, &stc) != -1 && S_ISDIR(stc.st_mode)) { 2233 /* 2234 * "filename/new" exists and is a directory; you are 2235 * using Qmail. 2236 */ 2237 stb = stc; 2238 #if defined(BSDTIMES) || defined(_SEQUENT_) 2239 new = stb.st_mtime > time0.tv_sec; 2240 #else 2241 new = stb.st_mtime > seconds0; 2242 #endif 2243 mboxdir = tempfilename; 2244 } 2245 2246 if (stb.st_mtime <= chktim + 1 || (loginsh && !new)) 2247 continue; 2248 2249 if ((mailbox = opendir(mboxdir)) == NULL) 2250 continue; 2251 2252 /* skip . and .. */ 2253 if (!readdir(mailbox) || !readdir(mailbox)) 2254 continue; 2255 2256 while (readdir(mailbox)) 2257 mailcount++; 2258 2259 if (mailcount == 0) 2260 continue; 2261 2262 if (cnt == 1) 2263 xprintf(CGETS(11, 3, "You have %d mail messages.\n"), 2264 mailcount); 2265 else 2266 xprintf(CGETS(11, 4, "You have %d mail messages in %s.\n"), 2267 mailcount, filename); 2268 } 2269 else { 2270 if (stb.st_size == 0 || stb.st_atime > stb.st_mtime || 2271 (stb.st_atime <= chktim && stb.st_mtime <= chktim) || 2272 (loginsh && !new)) 2273 continue; 2274 if (cnt == 1) 2275 xprintf(CGETS(11, 5, "You have %smail.\n"), 2276 new ? CGETS(11, 6, "new ") : ""); 2277 else 2278 xprintf(CGETS(11, 7, "You have %smail in %s.\n"), 2279 new ? CGETS(11, 6, "new ") : "", filename); 2280 } 2281 } 2282 chktim = t; 2283 } 2284 2285 /* 2286 * Extract a home directory from the password file 2287 * The argument points to a buffer where the name of the 2288 * user whose home directory is sought is currently. 2289 * We write the home directory of the user back there. 2290 */ 2291 int 2292 gethdir(home) 2293 Char *home; 2294 { 2295 Char *h; 2296 2297 /* 2298 * Is it us? 2299 */ 2300 if (*home == '\0') { 2301 if ((h = varval(STRhome)) != STRNULL) { 2302 (void) Strcpy(home, h); 2303 return 0; 2304 } 2305 else 2306 return 1; 2307 } 2308 2309 /* 2310 * Look in the cache 2311 */ 2312 if ((h = gettilde(home)) == NULL) 2313 return 1; 2314 else { 2315 (void) Strcpy(home, h); 2316 return 0; 2317 } 2318 } 2319 2320 /* 2321 * Move the initial descriptors to their eventual 2322 * resting places, closing all other units. 2323 */ 2324 void 2325 initdesc() 2326 { 2327 #ifdef NLS_BUGS 2328 #ifdef NLS_CATALOGS 2329 (void)catclose(catd); 2330 #endif /* NLS_CATALOGS */ 2331 #endif /* NLS_BUGS */ 2332 2333 2334 didfds = 0; /* 0, 1, 2 aren't set up */ 2335 (void) close_on_exec(SHIN = dcopy(0, FSHIN), 1); 2336 (void) close_on_exec(SHOUT = dcopy(1, FSHOUT), 1); 2337 (void) close_on_exec(SHDIAG = dcopy(2, FSHDIAG), 1); 2338 (void) close_on_exec(OLDSTD = dcopy(SHIN, FOLDSTD), 1); 2339 #ifndef CLOSE_ON_EXEC 2340 didcch = 0; /* Havent closed for child */ 2341 #endif /* CLOSE_ON_EXEC */ 2342 isdiagatty = isatty(SHDIAG); 2343 isoutatty = isatty(SHOUT); 2344 closem(); 2345 #ifdef NLS_BUGS 2346 #ifdef NLS_CATALOGS 2347 nlsinit(); 2348 #endif /* NLS_CATALOGS */ 2349 #endif /* NLS_BUGS */ 2350 } 2351 2352 2353 void 2354 #ifdef PROF 2355 done(i) 2356 #else 2357 xexit(i) 2358 #endif 2359 int i; 2360 { 2361 #ifdef TESLA 2362 if (loginsh && do_logout) { 2363 /* this is to send hangup signal to the develcon */ 2364 /* we toggle DTR. clear dtr - sleep 1 - set dtr */ 2365 /* ioctl will return ENOTTY for pty's but we ignore it */ 2366 /* exitstat will run after disconnect */ 2367 /* we sleep for 2 seconds to let things happen in */ 2368 /* .logout and rechist() */ 2369 #ifdef TIOCCDTR 2370 (void) sleep(2); 2371 (void) ioctl(FSHTTY, TIOCCDTR, NULL); 2372 (void) sleep(1); 2373 (void) ioctl(FSHTTY, TIOCSDTR, NULL); 2374 #endif /* TIOCCDTR */ 2375 } 2376 #endif /* TESLA */ 2377 2378 { 2379 struct process *pp, *np; 2380 2381 /* Kill all processes marked for hup'ing */ 2382 for (pp = proclist.p_next; pp; pp = pp->p_next) { 2383 np = pp; 2384 do 2385 if ((np->p_flags & PHUP) && np->p_jobid != shpgrp) { 2386 if (killpg(np->p_jobid, SIGHUP) != -1) { 2387 /* In case the job was suspended... */ 2388 #ifdef SIGCONT 2389 (void) killpg(np->p_jobid, SIGCONT); 2390 #endif 2391 break; 2392 } 2393 } 2394 while ((np = np->p_friends) != pp); 2395 } 2396 } 2397 untty(); 2398 #ifdef NLS_CATALOGS 2399 /* 2400 * We need to call catclose, because SVR4 leaves symlinks behind otherwise 2401 * in the catalog directories. We cannot close on a vforked() child, 2402 * because messages will stop working on the parent too. 2403 */ 2404 if (child == 0) 2405 (void) catclose(catd); 2406 #endif /* NLS_CATALOGS */ 2407 #ifdef WINNT_NATIVE 2408 nt_cleanup(); 2409 #endif /* WINNT_NATIVE */ 2410 _exit(i); 2411 } 2412 2413 #ifndef _PATH_DEFPATH 2414 static Char ** 2415 defaultpath() 2416 { 2417 char *ptr; 2418 Char **blk, **blkp; 2419 struct stat stb; 2420 2421 blkp = blk = (Char **) xmalloc((size_t) sizeof(Char *) * 10); 2422 2423 #ifndef NODOT 2424 # ifndef DOTLAST 2425 *blkp++ = Strsave(STRdot); 2426 # endif 2427 #endif 2428 2429 #define DIRAPPEND(a) \ 2430 if (stat(ptr = a, &stb) == 0 && S_ISDIR(stb.st_mode)) \ 2431 *blkp++ = SAVE(ptr) 2432 2433 #ifdef _PATH_LOCAL 2434 DIRAPPEND(_PATH_LOCAL); 2435 #endif 2436 2437 #ifdef _PATH_USRUCB 2438 DIRAPPEND(_PATH_USRUCB); 2439 #endif 2440 2441 #ifdef _PATH_USRBSD 2442 DIRAPPEND(_PATH_USRBSD); 2443 #endif 2444 2445 #ifdef _PATH_BIN 2446 DIRAPPEND(_PATH_BIN); 2447 #endif 2448 2449 #ifdef _PATH_USRBIN 2450 DIRAPPEND(_PATH_USRBIN); 2451 #endif 2452 2453 #undef DIRAPPEND 2454 2455 #ifndef NODOT 2456 # ifdef DOTLAST 2457 *blkp++ = Strsave(STRdot); 2458 # endif 2459 #endif 2460 *blkp = NULL; 2461 return (blk); 2462 } 2463 #endif 2464 2465 static void 2466 record() 2467 { 2468 if (!fast) { 2469 recdirs(NULL, adrof(STRsavedirs) != NULL); 2470 rechist(NULL, adrof(STRsavehist) != NULL); 2471 } 2472 } 2473