1 /* $Header: /src/pub/tcsh/sh.c,v 3.92 2000/11/11 23:03:35 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 3.92 2000/11/11 23:03:35 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 static int srcfile __P((char *, bool, int, Char **)); 164 static sigret_t phup __P((int)); 165 static void srcunit __P((int, bool, int, Char **)); 166 static void mailchk __P((void)); 167 #ifndef _PATH_DEFPATH 168 static Char **defaultpath __P((void)); 169 #endif 170 static void record __P((void)); 171 static void st_save __P((struct saved_state *, int, int, 172 Char **, Char **)); 173 static void st_restore __P((struct saved_state *, Char **)); 174 175 int main __P((int, char **)); 176 177 int 178 main(argc, argv) 179 int argc; 180 char **argv; 181 { 182 register Char *cp; 183 #ifdef AUTOLOGOUT 184 register Char *cp2; 185 #endif 186 register char *tcp, *ttyn; 187 register int f; 188 register char **tempv; 189 190 #ifdef BSDSIGS 191 sigvec_t osv; 192 #endif /* BSDSIGS */ 193 194 #ifdef WINNT_NATIVE 195 nt_init(); 196 #endif /* WINNT_NATIVE */ 197 #if defined(NLS_CATALOGS) && defined(LC_MESSAGES) 198 (void) setlocale(LC_MESSAGES, ""); 199 #endif /* NLS_CATALOGS && LC_MESSAGES */ 200 201 #ifdef NLS 202 # ifdef LC_CTYPE 203 (void) setlocale(LC_CTYPE, ""); /* for iscntrl */ 204 # endif /* LC_CTYPE */ 205 #endif /* NLS */ 206 207 nlsinit(); 208 209 #ifdef MALLOC_TRACE 210 mal_setstatsfile(fdopen(dup2(open("/tmp/tcsh.trace", 211 O_WRONLY|O_CREAT, 0666), 25), "w")); 212 mal_trace(1); 213 #endif /* MALLOC_TRACE */ 214 215 #if !(defined(BSDTIMES) || defined(_SEQUENT_)) && defined(POSIX) 216 # ifdef _SC_CLK_TCK 217 clk_tck = (clock_t) sysconf(_SC_CLK_TCK); 218 # else /* ! _SC_CLK_TCK */ 219 # ifdef CLK_TCK 220 clk_tck = CLK_TCK; 221 # else /* !CLK_TCK */ 222 clk_tck = HZ; 223 # endif /* CLK_TCK */ 224 # endif /* _SC_CLK_TCK */ 225 #endif /* !BSDTIMES && POSIX */ 226 227 settimes(); /* Immed. estab. timing base */ 228 #ifdef TESLA 229 do_logout = 0; 230 #endif /* TESLA */ 231 232 /* 233 * Make sure we have 0, 1, 2 open 234 * Otherwise `` jobs will not work... (From knaff@poly.polytechnique.fr) 235 */ 236 { 237 do 238 if ((f = open(_PATH_DEVNULL, O_RDONLY)) == -1 && 239 (f = open("/", O_RDONLY)) == -1) 240 exit(1); 241 while (f < 3); 242 (void) close(f); 243 } 244 245 osinit(); /* Os dependent initialization */ 246 247 248 { 249 char *t; 250 251 t = strrchr(argv[0], '/'); 252 #ifdef WINNT_NATIVE 253 { 254 char *s = strrchr(argv[0], '\\'); 255 if (s) 256 t = s; 257 } 258 #endif /* WINNT_NATIVE */ 259 t = t ? t + 1 : argv[0]; 260 if (*t == '-') t++; 261 progname = strsave((t && *t) ? t : tcshstr); /* never want a null */ 262 tcsh = strcmp(progname, tcshstr) == 0; 263 } 264 265 /* 266 * Initialize non constant strings 267 */ 268 #ifdef _PATH_BSHELL 269 STR_BSHELL = SAVE(_PATH_BSHELL); 270 #endif 271 #ifdef _PATH_TCSHELL 272 STR_SHELLPATH = SAVE(_PATH_TCSHELL); 273 #else 274 # ifdef _PATH_CSHELL 275 STR_SHELLPATH = SAVE(_PATH_CSHELL); 276 # endif 277 #endif 278 STR_environ = blk2short(environ); 279 environ = short2blk(STR_environ); /* So that we can free it */ 280 STR_WORD_CHARS = SAVE(WORD_CHARS); 281 282 HIST = '!'; 283 HISTSUB = '^'; 284 PRCH = '>'; 285 PRCHROOT = '#'; 286 word_chars = STR_WORD_CHARS; 287 bslash_quote = 0; /* PWP: do tcsh-style backslash quoting? */ 288 289 /* Default history size to 100 */ 290 set(STRhistory, SAVE("100"), VAR_READWRITE); 291 292 tempv = argv; 293 ffile = SAVE(tempv[0]); 294 dolzero = 0; 295 if (eq(ffile, STRaout)) /* A.out's are quittable */ 296 quitit = 1; 297 uid = getuid(); 298 gid = getgid(); 299 euid = geteuid(); 300 egid = getegid(); 301 #if defined(OREO) || defined(DT_SUPPORT) 302 /* 303 * We are a login shell if: 1. we were invoked as -<something> with 304 * optional arguments 2. or we were invoked only with the -l flag 305 */ 306 loginsh = (**tempv == '-') || (argc == 2 && 307 tempv[1][0] == '-' && tempv[1][1] == 'l' && 308 tempv[1][2] == '\0'); 309 #else 310 /* 311 * We are a login shell if: 1. we were invoked as -<something> and we had 312 * no arguments 2. or we were invoked only with the -l flag 313 */ 314 loginsh = (**tempv == '-' && argc == 1) || (argc == 2 && 315 tempv[1][0] == '-' && tempv[1][1] == 'l' && 316 tempv[1][2] == '\0'); 317 #endif 318 319 #ifdef _VMS_POSIX 320 /* No better way to find if we are a login shell */ 321 if (!loginsh) { 322 loginsh = (argc == 1 && getppid() == 1); 323 **tempv = '-'; /* Avoid giving VMS an acidic stomach */ 324 } 325 #endif /* _VMS_POSIX */ 326 327 if (loginsh && **tempv != '-') { 328 /* 329 * Mangle the argv space 330 */ 331 tempv[1][0] = '\0'; 332 tempv[1][1] = '\0'; 333 tempv[1] = NULL; 334 for (tcp = *tempv; *tcp++;) 335 continue; 336 for (tcp--; tcp >= *tempv; tcp--) 337 tcp[1] = tcp[0]; 338 *++tcp = '-'; 339 argc--; 340 } 341 if (loginsh) { 342 (void) time(&chktim); 343 set(STRloginsh, Strsave(STRNULL), VAR_READWRITE); 344 } 345 346 AsciiOnly = 1; 347 NoNLSRebind = getenv("NOREBIND") != NULL; 348 #ifdef NLS 349 # ifdef SETLOCALEBUG 350 dont_free = 1; 351 # endif /* SETLOCALEBUG */ 352 (void) setlocale(LC_ALL, ""); 353 # ifdef LC_COLLATE 354 (void) setlocale(LC_COLLATE, ""); 355 # endif 356 # ifdef SETLOCALEBUG 357 dont_free = 0; 358 # endif /* SETLOCALEBUG */ 359 # ifdef STRCOLLBUG 360 fix_strcoll_bug(); 361 # endif /* STRCOLLBUG */ 362 363 { 364 int k; 365 366 for (k = 0200; k <= 0377 && !Isprint(k); k++) 367 continue; 368 AsciiOnly = k > 0377; 369 } 370 #else 371 AsciiOnly = getenv("LANG") == NULL && getenv("LC_CTYPE") == NULL; 372 #endif /* NLS */ 373 if (MapsAreInited && !NLSMapsAreInited) 374 ed_InitNLSMaps(); 375 ResetArrowKeys(); 376 377 /* 378 * Initialize for periodic command intervals. Also, initialize the dummy 379 * tty list for login-watch. 380 */ 381 (void) time(&t_period); 382 #ifndef HAVENOUTMP 383 initwatch(); 384 #endif /* !HAVENOUTMP */ 385 386 #if defined(alliant) 387 /* 388 * From: Jim Pace <jdp@research.att.com> 389 * tcsh does not work properly on the alliants through an rlogin session. 390 * The shell generally hangs. Also, reference to the controlling terminal 391 * does not work ( ie: echo foo > /dev/tty ). 392 * 393 * A security feature was added to rlogind affecting FX/80's Concentrix 394 * from revision 5.5.xx upwards (through 5.7 where this fix was implemented) 395 * This security change also affects the FX/2800 series. 396 * The security change to rlogind requires the process group of an rlogin 397 * session become disassociated with the tty in rlogind. 398 * 399 * The changes needed are: 400 * 1. set the process group 401 * 2. reenable the control terminal 402 */ 403 if (loginsh && isatty(SHIN)) { 404 ttyn = (char *) ttyname(SHIN); 405 (void) close(SHIN); 406 SHIN = open(ttyn, O_RDWR); 407 shpgrp = getpid(); 408 (void) ioctl (SHIN, TIOCSPGRP, (ioctl_t) &shpgrp); 409 (void) setpgid(0, shpgrp); 410 } 411 #endif /* alliant */ 412 413 /* 414 * Move the descriptors to safe places. The variable didfds is 0 while we 415 * have only FSH* to work with. When didfds is true, we have 0,1,2 and 416 * prefer to use these. 417 */ 418 initdesc(); 419 420 /* 421 * Get and set the tty now 422 */ 423 if ((ttyn = ttyname(SHIN)) != NULL) { 424 /* 425 * Could use rindex to get rid of other possible path components, but 426 * hpux preserves the subdirectory /pty/ when storing the tty name in 427 * utmp, so we keep it too. 428 */ 429 if (strncmp(ttyn, "/dev/", 5) == 0) 430 set(STRtty, cp = SAVE(ttyn + 5), VAR_READWRITE); 431 else 432 set(STRtty, cp = SAVE(ttyn), VAR_READWRITE); 433 } 434 else 435 set(STRtty, cp = SAVE(""), VAR_READWRITE); 436 /* 437 * Initialize the shell variables. ARGV and PROMPT are initialized later. 438 * STATUS is also munged in several places. CHILD is munged when 439 * forking/waiting 440 */ 441 442 /* 443 * 7-10-87 Paul Placeway autologout should be set ONLY on login shells and 444 * on shells running as root. Out of these, autologout should NOT be set 445 * for any psudo-terminals (this catches most window systems) and not for 446 * any terminal running X windows. 447 * 448 * At Ohio State, we have had problems with a user having his X session 449 * drop out from under him (on a Sun) because the shell in his master 450 * xterm timed out and exited. 451 * 452 * Really, this should be done with a program external to the shell, that 453 * watches for no activity (and NO running programs, such as dump) on a 454 * terminal for a long peroid of time, and then SIGHUPS the shell on that 455 * terminal. 456 * 457 * bugfix by Rich Salz <rsalz@PINEAPPLE.BBN.COM>: For root rsh things 458 * allways first check to see if loginsh or really root, then do things 459 * with ttyname() 460 * 461 * Also by Jean-Francois Lamy <lamy%ai.toronto.edu@RELAY.CS.NET>: check the 462 * value of cp before using it! ("root can rsh too") 463 * 464 * PWP: keep the nested ifs; the order of the tests matters and a good 465 * (smart) C compiler might re-arange things wrong. 466 */ 467 #ifdef AUTOLOGOUT 468 # ifdef convex 469 if (uid == 0) { 470 /* root always has a 15 minute autologout */ 471 set(STRautologout, Strsave(STRrootdefautologout), VAR_READWRITE); 472 } 473 else 474 if (loginsh) 475 /* users get autologout set to 0 */ 476 set(STRautologout, Strsave(STR0), VAR_READWRITE); 477 # else /* convex */ 478 if (loginsh || (uid == 0)) { 479 if (*cp) { 480 /* only for login shells or root and we must have a tty */ 481 if ((cp2 = Strrchr(cp, (Char) '/')) != NULL) { 482 cp = cp2 + 1; 483 } 484 else 485 cp2 = cp; 486 if (!(((Strncmp(cp2, STRtty, 3) == 0) && Isalpha(cp2[3])) || 487 ((Strncmp(cp, STRpts, 3) == 0) && cp[3] == '/'))) { 488 if (getenv("DISPLAY") == NULL) { 489 /* NOT on X window shells */ 490 set(STRautologout, Strsave(STRdefautologout), 491 VAR_READWRITE); 492 } 493 } 494 } 495 } 496 # endif /* convex */ 497 #endif /* AUTOLOGOUT */ 498 499 (void) sigset(SIGALRM, alrmcatch); 500 501 set(STRstatus, Strsave(STR0), VAR_READWRITE); 502 503 /* 504 * get and set machine specific envirnment variables 505 */ 506 getmachine(); 507 508 fix_version(); /* publish the shell version */ 509 510 /* 511 * Publish the selected echo style 512 */ 513 #if ECHO_STYLE == NONE_ECHO 514 set(STRecho_style, Strsave(STRnone), VAR_READWRITE); 515 #endif /* ECHO_STYLE == NONE_ECHO */ 516 #if ECHO_STYLE == BSD_ECHO 517 set(STRecho_style, Strsave(STRbsd), VAR_READWRITE); 518 #endif /* ECHO_STYLE == BSD_ECHO */ 519 #if ECHO_STYLE == SYSV_ECHO 520 set(STRecho_style, Strsave(STRsysv), VAR_READWRITE); 521 #endif /* ECHO_STYLE == SYSV_ECHO */ 522 #if ECHO_STYLE == BOTH_ECHO 523 set(STRecho_style, Strsave(STRboth), VAR_READWRITE); 524 #endif /* ECHO_STYLE == BOTH_ECHO */ 525 526 /* 527 * increment the shell level. 528 */ 529 shlvl(1); 530 531 if ((tcp = getenv("HOME")) != NULL) { 532 if (strlen(tcp) >= MAXPATHLEN) { 533 struct passwd *pw; 534 if ((pw = getpwuid(getuid())) != NULL) 535 cp = quote(SAVE(pw->pw_dir)); 536 else { 537 tcp[MAXPATHLEN-1] = '\0'; 538 cp = quote(SAVE(tcp)); 539 } 540 } else { 541 cp = quote(SAVE(tcp)); 542 } 543 } else 544 cp = NULL; 545 546 if (cp == NULL) 547 fast = 1; /* No home -> can't read scripts */ 548 else 549 set(STRhome, cp, VAR_READWRITE); 550 551 dinit(cp); /* dinit thinks that HOME == cwd in a login 552 * shell */ 553 /* 554 * Grab other useful things from the environment. Should we grab 555 * everything?? 556 */ 557 { 558 char *cln, *cus, *cgr; 559 Char buff[BUFSIZE]; 560 struct passwd *pw; 561 struct group *gr; 562 563 564 #ifdef apollo 565 int oid = getoid(); 566 567 (void) Itoa(oid, buff, 0, 0); 568 set(STRoid, Strsave(buff), VAR_READWRITE); 569 #endif /* apollo */ 570 571 (void) Itoa(uid, buff, 0, 0); 572 set(STRuid, Strsave(buff), VAR_READWRITE); 573 574 (void) Itoa(gid, buff, 0, 0); 575 set(STRgid, Strsave(buff), VAR_READWRITE); 576 577 cln = getenv("LOGNAME"); 578 cus = getenv("USER"); 579 if (cus != NULL) 580 set(STRuser, quote(SAVE(cus)), VAR_READWRITE); 581 else if (cln != NULL) 582 set(STRuser, quote(SAVE(cln)), VAR_READWRITE); 583 else if ((pw = getpwuid(uid)) == NULL) 584 set(STRuser, SAVE("unknown"), VAR_READWRITE); 585 else 586 set(STRuser, SAVE(pw->pw_name), VAR_READWRITE); 587 if (cln == NULL) 588 tsetenv(STRLOGNAME, varval(STRuser)); 589 if (cus == NULL) 590 tsetenv(STRKUSER, varval(STRuser)); 591 592 cgr = getenv("GROUP"); 593 if (cgr != NULL) 594 set(STRgroup, quote(SAVE(cgr)), VAR_READWRITE); 595 else if ((gr = getgrgid(gid)) == NULL) 596 set(STRgroup, SAVE("unknown"), VAR_READWRITE); 597 else 598 set(STRgroup, SAVE(gr->gr_name), VAR_READWRITE); 599 if (cgr == NULL) 600 tsetenv(STRKGROUP, varval(STRgroup)); 601 } 602 603 /* 604 * HOST may be wrong, since rexd transports the entire environment on sun 605 * 3.x Just set it again 606 */ 607 { 608 char cbuff[MAXHOSTNAMELEN]; 609 610 if (gethostname(cbuff, sizeof(cbuff)) >= 0) { 611 cbuff[sizeof(cbuff) - 1] = '\0'; /* just in case */ 612 tsetenv(STRHOST, str2short(cbuff)); 613 } 614 else 615 tsetenv(STRHOST, str2short("unknown")); 616 } 617 618 619 #ifdef REMOTEHOST 620 /* 621 * Try to determine the remote host we were logged in from. 622 */ 623 remotehost(); 624 #endif /* REMOTEHOST */ 625 626 #ifdef apollo 627 if ((tcp = getenv("SYSTYPE")) == NULL) 628 tcp = "bsd4.3"; 629 tsetenv(STRSYSTYPE, quote(str2short(tcp))); 630 #endif /* apollo */ 631 632 /* 633 * set editing on by default, unless running under Emacs as an inferior 634 * shell. 635 * We try to do this intelligently. If $TERM is available, then it 636 * should determine if we should edit or not. $TERM is preserved 637 * across rlogin sessions, so we will not get confused if we rlogin 638 * under an emacs shell. Another advantage is that if we run an 639 * xterm under an emacs shell, then the $TERM will be set to 640 * xterm, so we are going to want to edit. Unfortunately emacs 641 * does not restore all the tty modes, so xterm is not very well 642 * set up. But this is not the shell's fault. 643 * Also don't edit if $TERM == wm, for when we're running under an ATK app. 644 * Finally, emacs compiled under terminfo, sets the terminal to dumb, 645 * so disable editing for that too. 646 * 647 * Unfortunately, in some cases the initial $TERM setting is "unknown", 648 * "dumb", or "network" which is then changed in the user's startup files. 649 * We fix this by setting noediting here if $TERM is unknown/dumb and 650 * if noediting is set, we switch on editing if $TERM is changed. 651 */ 652 if ((tcp = getenv("TERM")) != NULL) { 653 set(STRterm, quote(SAVE(tcp)), VAR_READWRITE); 654 noediting = strcmp(tcp, "unknown") == 0 || strcmp(tcp, "dumb") == 0 || 655 strcmp(tcp, "network") == 0; 656 editing = strcmp(tcp, "emacs") != 0 && strcmp(tcp, "wm") != 0 && 657 !noediting; 658 } 659 else { 660 noediting = 0; 661 editing = ((tcp = getenv("EMACS")) == NULL || strcmp(tcp, "t") != 0); 662 } 663 664 /* 665 * The 'edit' variable is either set or unset. It doesn't 666 * need a value. Making it 'emacs' might be confusing. 667 */ 668 if (editing) 669 set(STRedit, Strsave(STRNULL), VAR_READWRITE); 670 671 672 /* 673 * still more mutability: make the complete routine automatically add the 674 * suffix of file names... 675 */ 676 set(STRaddsuffix, Strsave(STRNULL), VAR_READWRITE); 677 678 /* 679 * Re-initialize path if set in environment 680 */ 681 if ((tcp = getenv("PATH")) == NULL) 682 #ifdef _PATH_DEFPATH 683 importpath(str2short(_PATH_DEFPATH)); 684 #else /* !_PATH_DEFPATH */ 685 setq(STRpath, defaultpath(), &shvhed, VAR_READWRITE); 686 #endif /* _PATH_DEFPATH */ 687 else 688 /* Importpath() allocates memory for the path, and the 689 * returned pointer from SAVE() was discarded, so 690 * this was a memory leak.. (sg) 691 * 692 * importpath(SAVE(tcp)); 693 */ 694 importpath(str2short(tcp)); 695 696 697 { 698 /* If the SHELL environment variable ends with "tcsh", set 699 * STRshell to the same path. This is to facilitate using 700 * the executable in environments where the compiled-in 701 * default isn't appropriate (sg). 702 */ 703 704 int sh_len = 0; 705 706 if ((tcp = getenv("SHELL")) != NULL) { 707 sh_len = strlen(tcp); 708 if ((sh_len >= 5 && strcmp(tcp + (sh_len - 5), "/tcsh") == 0) || 709 (!tcsh && sh_len >= 4 && strcmp(tcp + (sh_len - 4), "/csh") == 0)) 710 set(STRshell, quote(SAVE(tcp)), VAR_READWRITE); 711 else 712 sh_len = 0; 713 } 714 if (sh_len == 0) 715 set(STRshell, Strsave(STR_SHELLPATH), VAR_READWRITE); 716 } 717 718 #ifdef COLOR_LS_F 719 if ((tcp = getenv("LS_COLORS")) != NULL) 720 parseLS_COLORS(str2short(tcp)); 721 #endif /* COLOR_LS_F */ 722 723 doldol = putn((int) getpid()); /* For $$ */ 724 #ifdef WINNT_NATIVE 725 { 726 char *strtmp1, strtmp2[MAXPATHLEN]; 727 if ((strtmp1 = getenv("TMP")) != NULL) 728 wsprintf(strtmp2, "%s/%s", strtmp1, "sh"); 729 shtemp = Strspl(SAVE(strtmp2), doldol); /* For << */ 730 } 731 #else /* !WINNT_NATIVE */ 732 shtemp = Strspl(STRtmpsh, doldol); /* For << */ 733 #endif /* WINNT_NATIVE */ 734 735 /* 736 * Record the interrupt states from the parent process. If the parent is 737 * non-interruptible our hand must be forced or we (and our children) won't 738 * be either. Our children inherit termination from our parent. We catch it 739 * only if we are the login shell. 740 */ 741 #ifdef BSDSIGS 742 /* 743 * PURIFY-2 claims that osv does not get 744 * initialized after the sigvec call 745 */ 746 setzero((char*) &osv, sizeof(osv)); 747 /* parents interruptibility */ 748 (void) mysigvec(SIGINT, NULL, &osv); 749 parintr = (signalfun_t) osv.sv_handler; 750 (void) mysigvec(SIGTERM, NULL, &osv); 751 parterm = (signalfun_t) osv.sv_handler; 752 #else /* BSDSIGS */ 753 parintr = signal(SIGINT, SIG_IGN); /* parents interruptibility */ 754 (void) sigset(SIGINT, parintr); /* ... restore */ 755 756 # ifdef COHERENT 757 if (loginsh) /* it seems that SIGTERM is always set to SIG_IGN by */ 758 /* init/getty so it should be set to SIG_DFL - there may be */ 759 /* a better fix for this. */ 760 parterm = SIG_DFL; 761 else 762 # else /* !COHERENT */ 763 parterm = signal(SIGTERM, SIG_IGN); /* parents terminability */ 764 # endif /* COHERENT */ 765 (void) sigset(SIGTERM, parterm); /* ... restore */ 766 767 #endif /* BSDSIGS */ 768 769 770 #ifdef TCF 771 /* Enable process migration on ourselves and our progeny */ 772 (void) signal(SIGMIGRATE, SIG_DFL); 773 #endif /* TCF */ 774 775 /* 776 * dspkanji/dspmbyte autosetting 777 */ 778 /* PATCH IDEA FROM Issei.Suzuki VERY THANKS */ 779 #if defined(DSPMBYTE) 780 #if defined(NLS) && defined(LC_CTYPE) 781 if (((tcp = setlocale(LC_CTYPE, NULL)) != NULL || (tcp = getenv("LANG")) != NULL) && !adrof(CHECK_MBYTEVAR)) { 782 #else 783 if ((tcp = getenv("LANG")) != NULL && !adrof(CHECK_MBYTEVAR)) { 784 #endif 785 autoset_dspmbyte(str2short(tcp)); 786 } 787 #if defined(WINNT_NATIVE) 788 else if (!adrof(CHECK_MBYTEVAR)) 789 nt_autoset_dspmbyte(); 790 #endif /* WINNT_NATIVE */ 791 #endif 792 793 /* 794 * Process the arguments. 795 * 796 * Note that processing of -v/-x is actually delayed till after script 797 * processing. 798 * 799 * We set the first character of our name to be '-' if we are a shell 800 * running interruptible commands. Many programs which examine ps'es 801 * use this to filter such shells out. 802 */ 803 argc--, tempv++; 804 while (argc > 0 && (tcp = tempv[0])[0] == '-' && 805 *++tcp != '\0' && !batch) { 806 do 807 switch (*tcp++) { 808 809 case 0: /* - Interruptible, no prompt */ 810 prompt = 0; 811 setintr = 1; 812 nofile = 1; 813 break; 814 815 case 'b': /* -b Next arg is input file */ 816 batch = 1; 817 break; 818 819 case 'c': /* -c Command input from arg */ 820 if (argc == 1) 821 xexit(0); 822 argc--, tempv++; 823 #ifdef M_XENIX 824 /* Xenix Vi bug: 825 it relies on a 7 bit environment (/bin/sh), so it 826 pass ascii arguments with the 8th bit set */ 827 if (!strcmp(argv[0], "sh")) 828 { 829 char *p; 830 831 for (p = tempv[0]; *p; ++p) 832 *p &= ASCII; 833 } 834 #endif 835 arginp = SAVE(tempv[0]); 836 837 /* 838 * we put the command into a variable 839 */ 840 if (arginp != NULL) 841 set(STRcommand, quote(Strsave(arginp)), VAR_READWRITE); 842 843 /* 844 * * Give an error on -c arguments that end in * backslash to 845 * ensure that you don't make * nonportable csh scripts. 846 */ 847 { 848 register int count; 849 850 cp = arginp + Strlen(arginp); 851 count = 0; 852 while (cp > arginp && *--cp == '\\') 853 ++count; 854 if ((count & 1) != 0) { 855 exiterr = 1; 856 stderror(ERR_ARGC); 857 } 858 } 859 prompt = 0; 860 nofile = 1; 861 break; 862 case 'd': /* -d Load directory stack from file */ 863 rdirs = 1; 864 break; 865 866 #ifdef apollo 867 case 'D': /* -D Define environment variable */ 868 { 869 register Char *dp; 870 871 cp = str2short(tcp); 872 if (dp = Strchr(cp, '=')) { 873 *dp++ = '\0'; 874 tsetenv(cp, dp); 875 } 876 else 877 tsetenv(cp, STRNULL); 878 } 879 *tcp = '\0'; /* done with this argument */ 880 break; 881 #endif /* apollo */ 882 883 case 'e': /* -e Exit on any error */ 884 exiterr = 1; 885 break; 886 887 case 'f': /* -f Fast start */ 888 fast = 1; 889 break; 890 891 case 'i': /* -i Interactive, even if !intty */ 892 intact = 1; 893 nofile = 1; 894 break; 895 896 case 'm': /* -m read .cshrc (from su) */ 897 mflag = 1; 898 break; 899 900 case 'n': /* -n Don't execute */ 901 noexec = 1; 902 break; 903 904 case 'q': /* -q (Undoc'd) ... die on quit */ 905 quitit = 1; 906 break; 907 908 case 's': /* -s Read from std input */ 909 nofile = 1; 910 break; 911 912 case 't': /* -t Read one line from input */ 913 onelflg = 2; 914 prompt = 0; 915 nofile = 1; 916 break; 917 918 case 'v': /* -v Echo hist expanded input */ 919 nverbose = 1; /* ... later */ 920 break; 921 922 case 'x': /* -x Echo just before execution */ 923 nexececho = 1; /* ... later */ 924 break; 925 926 case 'V': /* -V Echo hist expanded input */ 927 setNS(STRverbose); /* NOW! */ 928 break; 929 930 case 'X': /* -X Echo just before execution */ 931 setNS(STRecho); /* NOW! */ 932 break; 933 934 case 'F': /* Undocumented flag */ 935 /* 936 * This will cause children to be created using fork instead of 937 * vfork. 938 */ 939 use_fork = 1; 940 break; 941 942 case ' ': 943 case '\t': 944 /* 945 * for O/S's that don't do the argument parsing right in 946 * "#!/foo -f " scripts 947 */ 948 break; 949 950 default: /* Unknown command option */ 951 exiterr = 1; 952 stderror(ERR_TCSHUSAGE, tcp-1, progname); 953 break; 954 955 } while (*tcp); 956 tempv++, argc--; 957 } 958 959 if (quitit) /* With all due haste, for debugging */ 960 (void) signal(SIGQUIT, SIG_DFL); 961 962 /* 963 * Unless prevented by -, -c, -i, -s, or -t, if there are remaining 964 * arguments the first of them is the name of a shell file from which to 965 * read commands. 966 */ 967 if (nofile == 0 && argc > 0) { 968 nofile = open(tempv[0], O_RDONLY); 969 if (nofile < 0) { 970 child = 1; /* So this ... */ 971 /* ... doesn't return */ 972 stderror(ERR_SYSTEM, tempv[0], strerror(errno)); 973 } 974 if (ffile != NULL) 975 xfree((ptr_t) ffile); 976 dolzero = 1; 977 ffile = SAVE(tempv[0]); 978 /* 979 * Replace FSHIN. Handle /dev/std{in,out,err} specially 980 * since once they are closed we cannot open them again. 981 * In that case we use our own saved descriptors 982 */ 983 if ((SHIN = dmove(nofile, FSHIN)) < 0) 984 switch(nofile) { 985 case 0: 986 SHIN = FSHIN; 987 break; 988 case 1: 989 SHIN = FSHOUT; 990 break; 991 case 2: 992 SHIN = FSHDIAG; 993 break; 994 default: 995 stderror(ERR_SYSTEM, tempv[0], strerror(errno)); 996 break; 997 } 998 (void) close_on_exec(SHIN, 1); 999 prompt = 0; 1000 /* argc not used any more */ tempv++; 1001 } 1002 1003 1004 /* 1005 * Consider input a tty if it really is or we are interactive. but not for 1006 * editing (christos) 1007 */ 1008 if (!(intty = isatty(SHIN))) { 1009 if (adrof(STRedit)) 1010 unsetv(STRedit); 1011 editing = 0; 1012 } 1013 intty |= intact; 1014 #ifndef convex 1015 if (intty || (intact && isatty(SHOUT))) { 1016 if (!batch && (uid != euid || gid != egid)) { 1017 errno = EACCES; 1018 child = 1; /* So this ... */ 1019 /* ... doesn't return */ 1020 stderror(ERR_SYSTEM, progname, strerror(errno)); 1021 } 1022 } 1023 #endif /* convex */ 1024 isoutatty = isatty(SHOUT); 1025 isdiagatty = isatty(SHDIAG); 1026 /* 1027 * Decide whether we should play with signals or not. If we are explicitly 1028 * told (via -i, or -) or we are a login shell (arg0 starts with -) or the 1029 * input and output are both the ttys("csh", or "csh</dev/ttyx>/dev/ttyx") 1030 * Note that in only the login shell is it likely that parent may have set 1031 * signals to be ignored 1032 */ 1033 if (loginsh || intact || (intty && isatty(SHOUT))) 1034 setintr = 1; 1035 settell(); 1036 /* 1037 * Save the remaining arguments in argv. 1038 */ 1039 setq(STRargv, blk2short(tempv), &shvhed, VAR_READWRITE); 1040 1041 /* 1042 * Set up the prompt. 1043 */ 1044 if (prompt) { 1045 if (tcsh) 1046 set(STRprompt, Strsave(STRdeftcshprompt), VAR_READWRITE); 1047 else 1048 set(STRprompt, Strsave(STRdefcshprompt), VAR_READWRITE); 1049 /* that's a meta-questionmark */ 1050 set(STRprompt2, Strsave(STRmquestion), VAR_READWRITE); 1051 set(STRprompt3, Strsave(STRKCORRECT), VAR_READWRITE); 1052 } 1053 1054 /* 1055 * If we are an interactive shell, then start fiddling with the signals; 1056 * this is a tricky game. 1057 */ 1058 shpgrp = mygetpgrp(); 1059 opgrp = tpgrp = -1; 1060 if (setintr) { 1061 signalfun_t osig; 1062 **argv = '-'; 1063 if (!quitit) /* Wary! */ 1064 (void) signal(SIGQUIT, SIG_IGN); 1065 (void) sigset(SIGINT, pintr); 1066 (void) sighold(SIGINT); 1067 (void) signal(SIGTERM, SIG_IGN); 1068 1069 /* 1070 * No reason I can see not to save history on all these events.. 1071 * Most usual occurrence is in a window system, where we're not a login 1072 * shell, but might as well be... (sg) 1073 * But there might be races when lots of shells exit together... 1074 * [this is also incompatible]. 1075 * We have to be mre careful here. If the parent wants to 1076 * ignore the signals then we leave them untouched... 1077 * We also only setup the handlers for shells that are trully 1078 * interactive. 1079 */ 1080 osig = signal(SIGHUP, phup); /* exit processing on HUP */ 1081 if (!loginsh && osig == SIG_IGN) 1082 (void) signal(SIGHUP, osig); 1083 #ifdef SIGXCPU 1084 osig = signal(SIGXCPU, phup); /* exit processing on XCPU */ 1085 if (!loginsh && osig == SIG_IGN) 1086 (void) signal(SIGXCPU, osig); 1087 #endif 1088 #ifdef SIGXFSZ 1089 osig = signal(SIGXFSZ, phup); /* exit processing on XFSZ */ 1090 if (!loginsh && osig == SIG_IGN) 1091 (void) signal(SIGXFSZ, osig); 1092 #endif 1093 1094 if (quitit == 0 && arginp == 0) { 1095 #ifdef SIGTSTP 1096 (void) signal(SIGTSTP, SIG_IGN); 1097 #endif 1098 #ifdef SIGTTIN 1099 (void) signal(SIGTTIN, SIG_IGN); 1100 #endif 1101 #ifdef SIGTTOU 1102 (void) signal(SIGTTOU, SIG_IGN); 1103 #endif 1104 /* 1105 * Wait till in foreground, in case someone stupidly runs csh & 1106 * dont want to try to grab away the tty. 1107 */ 1108 if (isatty(FSHDIAG)) 1109 f = FSHDIAG; 1110 else if (isatty(FSHOUT)) 1111 f = FSHOUT; 1112 else if (isatty(OLDSTD)) 1113 f = OLDSTD; 1114 else 1115 f = -1; 1116 1117 #ifdef NeXT 1118 /* NeXT 2.0 /usr/etc/rlogind, does not set our process group! */ 1119 if (shpgrp == 0) { 1120 shpgrp = getpid(); 1121 (void) setpgid(0, shpgrp); 1122 (void) tcsetpgrp(f, shpgrp); 1123 } 1124 #endif /* NeXT */ 1125 #ifdef BSDJOBS /* if we have tty job control */ 1126 retry: 1127 if ((tpgrp = tcgetpgrp(f)) != -1) { 1128 if (tpgrp != shpgrp) { 1129 signalfun_t old = signal(SIGTTIN, SIG_DFL); 1130 (void) kill(0, SIGTTIN); 1131 (void) signal(SIGTTIN, old); 1132 goto retry; 1133 } 1134 /* 1135 * Thanks to Matt Day for the POSIX references, and to 1136 * Paul Close for the SGI clarification. 1137 */ 1138 if (setdisc(f) != -1) { 1139 opgrp = shpgrp; 1140 shpgrp = getpid(); 1141 tpgrp = shpgrp; 1142 if (tcsetpgrp(f, shpgrp) == -1) { 1143 /* 1144 * On hpux 7.03 this fails with EPERM. This happens on 1145 * the 800 when opgrp != shpgrp at this point. (we were 1146 * forked from a non job control shell) 1147 * POSIX 7.2.4, says we failed because the process 1148 * group specified did not belong to a process 1149 * in the same session with the tty. So we set our 1150 * process group and try again. 1151 */ 1152 if (setpgid(0, shpgrp) == -1) { 1153 xprintf("setpgid:"); 1154 goto notty; 1155 } 1156 if (tcsetpgrp(f, shpgrp) == -1) { 1157 xprintf("tcsetpgrp:"); 1158 goto notty; 1159 } 1160 } 1161 /* 1162 * We check the process group now. If it is the same, then 1163 * we don't need to set it again. On hpux 7.0 on the 300's 1164 * if we set it again it fails with EPERM. This is the 1165 * correct behavior according to POSIX 4.3.3 if the process 1166 * was a session leader . 1167 */ 1168 else if (shpgrp != mygetpgrp()) { 1169 if(setpgid(0, shpgrp) == -1) { 1170 xprintf("setpgid:"); 1171 goto notty; 1172 } 1173 } 1174 #ifdef IRIS4D 1175 /* 1176 * But on irix 3.3 we need to set it again, even if it is 1177 * the same. We do that to tell the system that we 1178 * need BSD process group compatibility. 1179 */ 1180 else 1181 (void) setpgid(0, shpgrp); 1182 #endif 1183 (void) close_on_exec(dcopy(f, FSHTTY), 1); 1184 } 1185 else 1186 tpgrp = -1; 1187 } 1188 if (tpgrp == -1) { 1189 notty: 1190 xprintf(CGETS(11, 1, "Warning: no access to tty (%s).\n"), 1191 strerror(errno)); 1192 xprintf(CGETS(11, 2, "Thus no job control in this shell.\n")); 1193 /* 1194 * Fix from:Sakari Jalovaara <sja@sirius.hut.fi> if we don't 1195 * have access to tty, disable editing too 1196 */ 1197 if (adrof(STRedit)) 1198 unsetv(STRedit); 1199 editing = 0; 1200 } 1201 #else /* BSDJOBS */ /* don't have job control, so frotz it */ 1202 tpgrp = -1; 1203 #endif /* BSDJOBS */ 1204 } 1205 } 1206 if ((setintr == 0) && (parintr == SIG_DFL)) 1207 setintr = 1; 1208 1209 /* 1210 * SVR4 doesn't send a SIGCHLD when a child is stopped or continued if the 1211 * handler is installed with signal(2) or sigset(2). sigaction(2) must 1212 * be used instead. 1213 * 1214 * David Dawes (dawes@physics.su.oz.au) Sept 1991 1215 */ 1216 1217 #if SYSVREL > 3 1218 { 1219 struct sigaction act; 1220 act.sa_handler=pchild; 1221 (void) sigemptyset(&(act.sa_mask)); /* Don't block any extra sigs 1222 * when the handler is called 1223 */ 1224 act.sa_flags=0; /* want behaviour of sigset() without 1225 * SA_NOCLDSTOP 1226 */ 1227 1228 if ((sigaction(SIGCHLD,&act,(struct sigaction *)NULL)) == -1) 1229 stderror(ERR_SYSTEM, "sigaction", strerror(errno)); 1230 } 1231 #else /* SYSVREL <= 3 */ 1232 (void) sigset(SIGCHLD, pchild); /* while signals not ready */ 1233 #endif /* SYSVREL <= 3 */ 1234 1235 1236 if (intty && !arginp) 1237 (void) ed_Setup(editing);/* Get the tty state, and set defaults */ 1238 /* Only alter the tty state if editing */ 1239 1240 /* 1241 * Set an exit here in case of an interrupt or error reading the shell 1242 * start-up scripts. 1243 */ 1244 reenter = setexit(); /* PWP */ 1245 exitset++; 1246 haderr = 0; /* In case second time through */ 1247 if (!fast && reenter == 0) { 1248 /* Will have varval(STRhome) here because set fast if don't */ 1249 { 1250 int osetintr = setintr; 1251 signalfun_t oparintr = parintr; 1252 1253 #ifdef BSDSIGS 1254 sigmask_t omask = sigblock(sigmask(SIGINT)); 1255 #else 1256 (void) sighold(SIGINT); 1257 #endif 1258 setintr = 0; 1259 parintr = SIG_IGN; /* onintr in /etc/ files has no effect */ 1260 #ifdef LOGINFIRST 1261 #ifdef _PATH_DOTLOGIN 1262 if (loginsh) 1263 (void) srcfile(_PATH_DOTLOGIN, 0, 0, NULL); 1264 #endif 1265 #endif 1266 1267 #ifdef _PATH_DOTCSHRC 1268 (void) srcfile(_PATH_DOTCSHRC, 0, 0, NULL); 1269 #endif 1270 if (!arginp && !onelflg && !havhash) 1271 dohash(NULL,NULL); 1272 #ifndef LOGINFIRST 1273 #ifdef _PATH_DOTLOGIN 1274 if (loginsh) 1275 (void) srcfile(_PATH_DOTLOGIN, 0, 0, NULL); 1276 #endif 1277 #endif 1278 #ifdef BSDSIGS 1279 (void) sigsetmask(omask); 1280 #else 1281 (void) sigrelse(SIGINT); 1282 #endif 1283 setintr = osetintr; 1284 parintr = oparintr; 1285 } 1286 #ifdef LOGINFIRST 1287 if (loginsh) 1288 (void) srccat(varval(STRhome), STRsldotlogin); 1289 #endif 1290 /* upward compat. */ 1291 if (!srccat(varval(STRhome), STRsldottcshrc)) 1292 (void) srccat(varval(STRhome), STRsldotcshrc); 1293 1294 if (!fast && !arginp && !onelflg && !havhash) 1295 dohash(NULL,NULL); 1296 1297 /* 1298 * Source history before .login so that it is available in .login 1299 */ 1300 loadhist(NULL, 0); 1301 #ifndef LOGINFIRST 1302 if (loginsh) 1303 (void) srccat(varval(STRhome), STRsldotlogin); 1304 #endif 1305 if (!fast && (loginsh || rdirs)) 1306 loaddirs(NULL); 1307 } 1308 /* Initing AFTER .cshrc is the Right Way */ 1309 if (intty && !arginp) { /* PWP setup stuff */ 1310 ed_Init(); /* init the new line editor */ 1311 #ifdef SIG_WINDOW 1312 check_window_size(1); /* mung environment */ 1313 #endif /* SIG_WINDOW */ 1314 } 1315 1316 /* 1317 * Now are ready for the -v and -x flags 1318 */ 1319 if (nverbose) 1320 setNS(STRverbose); 1321 if (nexececho) 1322 setNS(STRecho); 1323 1324 /* 1325 * All the rest of the world is inside this call. The argument to process 1326 * indicates whether it should catch "error unwinds". Thus if we are a 1327 * interactive shell our call here will never return by being blown past on 1328 * an error. 1329 */ 1330 process(setintr); 1331 1332 /* 1333 * Mop-up. 1334 */ 1335 if (intty) { 1336 if (loginsh) { 1337 xprintf("logout\n"); 1338 (void) close(SHIN); 1339 child = 1; 1340 #ifdef TESLA 1341 do_logout = 1; 1342 #endif /* TESLA */ 1343 goodbye(NULL, NULL); 1344 } 1345 else { 1346 xprintf("exit\n"); 1347 } 1348 } 1349 record(); 1350 exitstat(); 1351 return (0); 1352 } 1353 1354 void 1355 untty() 1356 { 1357 #ifdef BSDJOBS 1358 if (tpgrp > 0 && opgrp != shpgrp) { 1359 (void) setpgid(0, opgrp); 1360 (void) tcsetpgrp(FSHTTY, opgrp); 1361 (void) resetdisc(FSHTTY); 1362 } 1363 #endif /* BSDJOBS */ 1364 } 1365 1366 void 1367 importpath(cp) 1368 Char *cp; 1369 { 1370 register int i = 0; 1371 register Char *dp; 1372 register Char **pv; 1373 int c; 1374 1375 for (dp = cp; *dp; dp++) 1376 if (*dp == PATHSEP) 1377 i++; 1378 /* 1379 * i+2 where i is the number of colons in the path. There are i+1 1380 * directories in the path plus we need room for a zero terminator. 1381 */ 1382 pv = (Char **) xcalloc((size_t) (i + 2), sizeof(Char *)); 1383 dp = cp; 1384 i = 0; 1385 if (*dp) 1386 for (;;) { 1387 if ((c = *dp) == PATHSEP || c == 0) { 1388 *dp = 0; 1389 pv[i++] = Strsave(*cp ? cp : STRdot); 1390 if (c) { 1391 cp = dp + 1; 1392 *dp = PATHSEP; 1393 } 1394 else 1395 break; 1396 } 1397 #ifdef WINNT_NATIVE 1398 else if (*dp == '\\') 1399 *dp = '/'; 1400 #endif /* WINNT_NATIVE */ 1401 dp++; 1402 } 1403 pv[i] = 0; 1404 setq(STRpath, pv, &shvhed, VAR_READWRITE); 1405 } 1406 1407 /* 1408 * Source to the file which is the catenation of the argument names. 1409 */ 1410 static int 1411 srccat(cp, dp) 1412 Char *cp, *dp; 1413 { 1414 if (cp[0] == '/' && cp[1] == '\0') 1415 return srcfile(short2str(dp), (mflag ? 0 : 1), 0, NULL); 1416 else { 1417 register Char *ep; 1418 char *ptr; 1419 int rv; 1420 1421 #ifdef WINNT_NATIVE 1422 ep = cp; 1423 while(*ep) 1424 ep++; 1425 if (ep[-1] == '/' && dp[0] == '/') /* silly win95 */ 1426 dp++; 1427 #endif /* WINNT_NATIVE */ 1428 1429 ep = Strspl(cp, dp); 1430 ptr = short2str(ep); 1431 1432 rv = srcfile(ptr, (mflag ? 0 : 1), 0, NULL); 1433 xfree((ptr_t) ep); 1434 return rv; 1435 } 1436 } 1437 1438 /* 1439 * Source to a file putting the file descriptor in a safe place (> 2). 1440 */ 1441 static int 1442 srcfile(f, onlyown, flag, av) 1443 char *f; 1444 bool onlyown; 1445 int flag; 1446 Char **av; 1447 { 1448 register int unit; 1449 1450 if ((unit = open(f, O_RDONLY)) == -1) 1451 return 0; 1452 unit = dmove(unit, -1); 1453 1454 (void) close_on_exec(unit, 1); 1455 srcunit(unit, onlyown, flag, av); 1456 return 1; 1457 } 1458 1459 1460 /* 1461 * Save the shell state, and establish new argument vector, and new input 1462 * fd. 1463 */ 1464 static void 1465 st_save(st, unit, hflg, al, av) 1466 struct saved_state *st; 1467 int unit, hflg; 1468 Char **al, **av; 1469 { 1470 st->insource = insource; 1471 st->SHIN = SHIN; 1472 st->intty = intty; 1473 st->whyles = whyles; 1474 st->gointr = gointr; 1475 st->arginp = arginp; 1476 st->evalp = evalp; 1477 st->evalvec = evalvec; 1478 st->alvecp = alvecp; 1479 st->alvec = alvec; 1480 st->onelflg = onelflg; 1481 st->enterhist = enterhist; 1482 if (hflg) 1483 st->HIST = HIST; 1484 else 1485 st->HIST = '\0'; 1486 st->cantell = cantell; 1487 cpybin(st->B, B); 1488 1489 /* 1490 * we can now pass arguments to source. 1491 * For compatibility we do that only if arguments were really 1492 * passed, otherwise we keep the old, global $argv like before. 1493 */ 1494 if (av != NULL && *av != NULL) { 1495 struct varent *vp; 1496 if ((vp = adrof(STRargv)) != NULL) 1497 st->argv = saveblk(vp->vec); 1498 else 1499 st->argv = NULL; 1500 setq(STRargv, saveblk(av), &shvhed, VAR_READWRITE); 1501 } 1502 else 1503 st->argv = NULL; 1504 1505 SHIN = unit; /* Do this first */ 1506 1507 /* Establish new input arena */ 1508 { 1509 fbuf = NULL; 1510 fseekp = feobp = fblocks = 0; 1511 settell(); 1512 } 1513 1514 arginp = 0; 1515 onelflg = 0; 1516 intty = isatty(SHIN); 1517 whyles = 0; 1518 gointr = 0; 1519 evalvec = 0; 1520 evalp = 0; 1521 alvec = al; 1522 alvecp = 0; 1523 enterhist = hflg; 1524 if (enterhist) 1525 HIST = '\0'; 1526 insource = 1; 1527 } 1528 1529 1530 /* 1531 * Restore the shell to a saved state 1532 */ 1533 static void 1534 st_restore(st, av) 1535 struct saved_state *st; 1536 Char **av; 1537 { 1538 if (st->SHIN == -1) 1539 return; 1540 1541 /* Reset input arena */ 1542 { 1543 register int i; 1544 register Char** nfbuf = fbuf; 1545 register int nfblocks = fblocks; 1546 1547 fblocks = 0; 1548 fbuf = NULL; 1549 for (i = 0; i < nfblocks; i++) 1550 xfree((ptr_t) nfbuf[i]); 1551 xfree((ptr_t) nfbuf); 1552 } 1553 cpybin(B, st->B); 1554 1555 (void) close(SHIN); 1556 1557 insource = st->insource; 1558 SHIN = st->SHIN; 1559 arginp = st->arginp; 1560 onelflg = st->onelflg; 1561 evalp = st->evalp; 1562 evalvec = st->evalvec; 1563 alvecp = st->alvecp; 1564 alvec = st->alvec; 1565 intty = st->intty; 1566 whyles = st->whyles; 1567 gointr = st->gointr; 1568 if (st->HIST != '\0') 1569 HIST = st->HIST; 1570 enterhist = st->enterhist; 1571 cantell = st->cantell; 1572 1573 if (st->argv != NULL) 1574 setq(STRargv, st->argv, &shvhed, VAR_READWRITE); 1575 else if (av != NULL && *av != NULL && adrof(STRargv) != NULL) 1576 unsetv(STRargv); 1577 } 1578 1579 /* 1580 * Source to a unit. If onlyown it must be our file or our group or 1581 * we don't chance it. This occurs on ".cshrc"s and the like. 1582 */ 1583 static void 1584 srcunit(unit, onlyown, hflg, av) 1585 register int unit; 1586 bool onlyown; 1587 int hflg; 1588 Char **av; 1589 { 1590 struct saved_state st; 1591 st.SHIN = -1; /* st_restore checks this */ 1592 1593 if (unit < 0) 1594 return; 1595 1596 if (didfds) 1597 donefds(); 1598 1599 if (onlyown) { 1600 struct stat stb; 1601 1602 if (fstat(unit, &stb) < 0) { 1603 (void) close(unit); 1604 return; 1605 } 1606 } 1607 1608 getexit(st.oldexit); 1609 1610 if (setintr) 1611 #ifdef BSDSIGS 1612 st.mask = sigblock(sigmask(SIGINT)); 1613 #else 1614 (void) sighold(SIGINT); 1615 #endif 1616 1617 /* Save the current state and move us to a new state */ 1618 st_save(&st, unit, hflg, NULL, av); 1619 1620 /* 1621 * Now if we are allowing commands to be interrupted, we let ourselves be 1622 * interrupted. 1623 */ 1624 if (setintr) 1625 #ifdef BSDSIGS 1626 (void) sigsetmask(st.mask); 1627 #else 1628 (void) sigrelse(SIGINT); 1629 #endif 1630 1631 /* 1632 * Bugfix for running out of memory by: Jak Kirman 1633 * <jak%cs.brown.edu@RELAY.CS.NET>. Solution: pay attention to what 1634 * setexit() is returning because reenter _may_ be in a register, and 1635 * thus restored to 0 on a longjump(). (PWP: insert flames about 1636 * compiler-dependant code here) PWP: THANKS LOTS !!! 1637 * 1638 * PWP: think of this as like a LISP (unwind-protect ...) 1639 * thanks to Diana Smetters for pointing out how this _should_ be written 1640 */ 1641 #ifdef cray 1642 st.reenter = 1; /* assume non-zero return val */ 1643 if (setexit() == 0) { 1644 st.reenter = 0; /* Oh well, we were wrong */ 1645 #else 1646 if ((st.reenter = setexit()) == 0) { 1647 #endif 1648 process(0); /* 0 -> blow away on errors */ 1649 } 1650 1651 if (setintr) 1652 #ifdef BSDSIGS 1653 (void) sigsetmask(st.mask); 1654 #else 1655 (void) sigrelse(SIGINT); 1656 #endif 1657 1658 /* Restore the old state */ 1659 st_restore(&st, av); 1660 resexit(st.oldexit); 1661 /* 1662 * If process reset() (effectively an unwind) then we must also unwind. 1663 */ 1664 if (st.reenter) 1665 stderror(ERR_SILENT); 1666 } 1667 1668 1669 /*ARGSUSED*/ 1670 void 1671 goodbye(v, c) 1672 Char **v; 1673 struct command *c; 1674 { 1675 USE(c); 1676 record(); 1677 1678 if (loginsh) { 1679 (void) sigset(SIGQUIT, SIG_IGN); 1680 (void) sigset(SIGINT, SIG_IGN); 1681 (void) sigset(SIGTERM, SIG_IGN); 1682 (void) sigset(SIGHUP, SIG_IGN); 1683 setintr = 0; /* No interrupts after "logout" */ 1684 /* Trap errors inside .logout */ 1685 reenter = setexit(); 1686 if (reenter != 0) 1687 exitstat(); 1688 if (!(adrof(STRlogout))) 1689 set(STRlogout, Strsave(STRnormal), VAR_READWRITE); 1690 #ifdef _PATH_DOTLOGOUT 1691 (void) srcfile(_PATH_DOTLOGOUT, 0, 0, NULL); 1692 #endif 1693 if (adrof(STRhome)) 1694 (void) srccat(varval(STRhome), STRsldtlogout); 1695 #ifdef TESLA 1696 do_logout = 1; 1697 #endif /* TESLA */ 1698 } 1699 exitstat(); 1700 } 1701 1702 void 1703 exitstat() 1704 { 1705 #ifdef PROF 1706 monitor(0); 1707 #endif 1708 /* 1709 * Note that if STATUS is corrupted (i.e. getn bombs) then error will exit 1710 * directly because we poke child here. Otherwise we might continue 1711 * unwarrantedly (sic). 1712 */ 1713 child = 1; 1714 1715 xexit(getn(varval(STRstatus))); 1716 } 1717 1718 /* 1719 * in the event of a HUP we want to save the history 1720 */ 1721 static sigret_t 1722 phup(snum) 1723 int snum; 1724 { 1725 /* 1726 * There is no return from here, 1727 * so we are not going to release SIGHUP 1728 * anymore 1729 */ 1730 #ifdef UNRELSIGS 1731 if (snum) 1732 (void) sigset(snum, SIG_IGN); 1733 #else 1734 # ifdef BSDSIGS 1735 (void) sigblock(sigmask(SIGHUP)); 1736 # else 1737 (void) sighold(SIGHUP); 1738 # endif /* BSDSIGS */ 1739 #endif /* UNRELSIGS */ 1740 1741 if (loginsh) { 1742 set(STRlogout, Strsave(STRhangup), VAR_READWRITE); 1743 #ifdef _PATH_DOTLOGOUT 1744 (void) srcfile(_PATH_DOTLOGOUT, 0, 0, NULL); 1745 #endif 1746 if (adrof(STRhome)) 1747 (void) srccat(varval(STRhome), STRsldtlogout); 1748 } 1749 1750 record(); 1751 1752 #ifdef POSIXJOBS 1753 /* 1754 * We kill the last foreground process group. It then becomes 1755 * responsible to propagate the SIGHUP to its progeny. 1756 */ 1757 { 1758 struct process *pp, *np; 1759 1760 for (pp = proclist.p_next; pp; pp = pp->p_next) { 1761 np = pp; 1762 /* 1763 * Find if this job is in the foreground. It could be that 1764 * the process leader has exited and the foreground flag 1765 * is cleared for it. 1766 */ 1767 do 1768 /* 1769 * If a process is in the foreground we try to kill 1770 * it's process group. If we succeed, then the 1771 * whole job is gone. Otherwise we keep going... 1772 * But avoid sending HUP to the shell again. 1773 */ 1774 if (((np->p_flags & PFOREGND) != 0) && np->p_jobid != shpgrp) { 1775 np->p_flags &= ~PHUP; 1776 if (killpg(np->p_jobid, SIGHUP) != -1) { 1777 /* In case the job was suspended... */ 1778 #ifdef SIGCONT 1779 (void) killpg(np->p_jobid, SIGCONT); 1780 #endif 1781 break; 1782 } 1783 } 1784 while ((np = np->p_friends) != pp); 1785 } 1786 } 1787 #endif /* POSIXJOBS */ 1788 1789 xexit(snum); 1790 #ifndef SIGVOID 1791 return (snum); 1792 #endif 1793 } 1794 1795 static Char *jobargv[2] = {STRjobs, 0}; 1796 1797 /* 1798 * Catch an interrupt, e.g. during lexical input. 1799 * If we are an interactive shell, we reset the interrupt catch 1800 * immediately. In any case we drain the shell output, 1801 * and finally go through the normal error mechanism, which 1802 * gets a chance to make the shell go away. 1803 */ 1804 int just_signaled; /* bugfix by Michael Bloom (mg@ttidca.TTI.COM) */ 1805 1806 #ifdef SIGVOID 1807 /*ARGSUSED*/ 1808 #endif 1809 sigret_t 1810 pintr(snum) 1811 int snum; 1812 { 1813 #ifdef UNRELSIGS 1814 if (snum) 1815 (void) sigset(snum, pintr); 1816 #endif /* UNRELSIGS */ 1817 just_signaled = 1; 1818 pintr1(1); 1819 #ifndef SIGVOID 1820 return (snum); 1821 #endif 1822 } 1823 1824 void 1825 pintr1(wantnl) 1826 bool wantnl; 1827 { 1828 register Char **v; 1829 #ifdef BSDSIGS 1830 sigmask_t omask; 1831 #endif 1832 1833 #ifdef BSDSIGS 1834 omask = sigblock((sigmask_t) 0); 1835 #endif 1836 if (setintr) { 1837 #ifdef BSDSIGS 1838 (void) sigsetmask(omask & ~sigmask(SIGINT)); 1839 #else 1840 (void) sigrelse(SIGINT); 1841 #endif 1842 if (pjobs) { 1843 pjobs = 0; 1844 xputchar('\n'); 1845 dojobs(jobargv, NULL); 1846 stderror(ERR_NAME | ERR_INTR); 1847 } 1848 } 1849 /* MH - handle interrupted completions specially */ 1850 { 1851 extern int InsideCompletion; 1852 1853 if (InsideCompletion) 1854 stderror(ERR_SILENT); 1855 } 1856 /* JV - Make sure we shut off inputl */ 1857 { 1858 extern Char GettingInput; 1859 1860 (void) Cookedmode(); 1861 GettingInput = 0; 1862 } 1863 #ifdef BSDSIGS 1864 (void) sigsetmask(omask & ~sigmask(SIGCHLD)); 1865 #else 1866 if (setintr) 1867 (void) sighold(SIGINT); 1868 (void) sigrelse(SIGCHLD); 1869 #endif 1870 drainoline(); 1871 #if !defined(_VMS_POSIX) && !defined(WINNT_NATIVE) 1872 (void) endpwent(); 1873 #endif /* !_VMS_POSIX && !WINNT_NATIVE */ 1874 1875 /* 1876 * If we have an active "onintr" then we search for the label. Note that if 1877 * one does "onintr -" then we shan't be interruptible so we needn't worry 1878 * about that here. 1879 */ 1880 if (gointr) { 1881 gotolab(gointr); 1882 timflg = 0; 1883 if ((v = pargv) != 0) 1884 pargv = 0, blkfree(v); 1885 if ((v = gargv) != 0) 1886 gargv = 0, blkfree(v); 1887 reset(); 1888 } 1889 else if (intty && wantnl) { 1890 if (editing) { 1891 /* 1892 * If we are editing a multi-line input command, and move to 1893 * the beginning of the line, we don't want to trash it when 1894 * we hit ^C 1895 */ 1896 PastBottom(); 1897 ClearLines(); 1898 ClearDisp(); 1899 } 1900 else { 1901 /* xputchar('\n'); *//* Some like this, others don't */ 1902 (void) putraw('\r'); 1903 (void) putraw('\n'); 1904 } 1905 } 1906 stderror(ERR_SILENT); 1907 } 1908 1909 /* 1910 * Process is the main driving routine for the shell. 1911 * It runs all command processing, except for those within { ... } 1912 * in expressions (which is run by a routine evalav in sh.exp.c which 1913 * is a stripped down process), and `...` evaluation which is run 1914 * also by a subset of this code in sh.glob.c in the routine backeval. 1915 * 1916 * The code here is a little strange because part of it is interruptible 1917 * and hence freeing of structures appears to occur when none is necessary 1918 * if this is ignored. 1919 * 1920 * Note that if catch is not set then we will unwind on any error. 1921 * If an end-of-file occurs, we return. 1922 */ 1923 static struct command *savet = NULL; 1924 void 1925 process(catch) 1926 bool catch; 1927 { 1928 extern char Expand; 1929 jmp_buf_t osetexit; 1930 /* PWP: This might get nuked my longjmp so don't make it a register var */ 1931 struct command *t = savet; 1932 1933 savet = NULL; 1934 getexit(osetexit); 1935 for (;;) { 1936 1937 pendjob(); 1938 1939 /* This was leaking memory badly, particularly when sourcing 1940 * files, etc.. For whatever reason we were arriving here with 1941 * allocated pointers still active, and the code was simply 1942 * overwriting them. I can't say I fully understand the 1943 * control flow here, but according to Purify this particular 1944 * leak has been plugged, and I haven't noticed any ill 1945 * effects.. (sg) 1946 */ 1947 if (paraml.next && paraml.next != ¶ml) 1948 freelex(¶ml); 1949 1950 paraml.next = paraml.prev = ¶ml; 1951 paraml.word = STRNULL; 1952 (void) setexit(); 1953 justpr = enterhist; /* execute if not entering history */ 1954 1955 /* 1956 * Interruptible during interactive reads 1957 */ 1958 if (setintr) 1959 #ifdef BSDSIGS 1960 (void) sigsetmask(sigblock((sigmask_t) 0) & ~sigmask(SIGINT)); 1961 #else 1962 (void) sigrelse(SIGINT); 1963 #endif 1964 1965 1966 /* 1967 * For the sake of reset() 1968 */ 1969 freelex(¶ml); 1970 if (savet) 1971 freesyn(savet), savet = NULL; 1972 1973 if (haderr) { 1974 if (!catch) { 1975 /* unwind */ 1976 doneinp = 0; 1977 savet = t; 1978 resexit(osetexit); 1979 reset(); 1980 } 1981 haderr = 0; 1982 /* 1983 * Every error is eventually caught here or the shell dies. It is 1984 * at this point that we clean up any left-over open files, by 1985 * closing all but a fixed number of pre-defined files. Thus 1986 * routines don't have to worry about leaving files open due to 1987 * deeper errors... they will get closed here. 1988 */ 1989 closem(); 1990 continue; 1991 } 1992 if (doneinp) { 1993 doneinp = 0; 1994 break; 1995 } 1996 if (chkstop) 1997 chkstop--; 1998 if (neednote) 1999 pnote(); 2000 if (intty && prompt && evalvec == 0) { 2001 just_signaled = 0; 2002 mailchk(); 2003 /* 2004 * Watch for logins/logouts. Next is scheduled commands stored 2005 * previously using "sched." Then execute periodic commands. 2006 * Following that, the prompt precmd is run. 2007 */ 2008 #ifndef HAVENOUTMP 2009 watch_login(0); 2010 #endif /* !HAVENOUTMP */ 2011 sched_run(0); 2012 period_cmd(); 2013 precmd(); 2014 /* 2015 * If we are at the end of the input buffer then we are going to 2016 * read fresh stuff. Otherwise, we are rereading input and don't 2017 * need or want to prompt. 2018 */ 2019 if (fseekp == feobp && aret == TCSH_F_SEEK) 2020 printprompt(0, NULL); 2021 flush(); 2022 setalarm(1); 2023 } 2024 if (seterr) { 2025 xfree((ptr_t) seterr); 2026 seterr = NULL; 2027 } 2028 2029 /* 2030 * Echo not only on VERBOSE, but also with history expansion. If there 2031 * is a lexical error then we forego history echo. 2032 */ 2033 if ((lex(¶ml) && !seterr && intty && !tellwhat && !Expand && 2034 !whyles) || adrof(STRverbose)) { 2035 haderr = 1; 2036 prlex(¶ml); 2037 haderr = 0; 2038 } 2039 (void) alarm(0); /* Autologout OFF */ 2040 2041 /* 2042 * The parser may lose space if interrupted. 2043 */ 2044 if (setintr) 2045 #ifdef BSDSIGS 2046 (void) sigblock(sigmask(SIGINT)); 2047 #else 2048 (void) sighold(SIGINT); 2049 #endif 2050 2051 /* 2052 * Save input text on the history list if reading in old history, or it 2053 * is from the terminal at the top level and not in a loop. 2054 * 2055 * PWP: entry of items in the history list while in a while loop is done 2056 * elsewhere... 2057 */ 2058 if (enterhist || (catch && intty && !whyles && !tellwhat && !arun)) 2059 savehist(¶ml, enterhist > 1); 2060 2061 if (Expand && seterr) 2062 Expand = 0; 2063 2064 /* 2065 * Print lexical error messages, except when sourcing history lists. 2066 */ 2067 if (!enterhist && seterr) 2068 stderror(ERR_OLD); 2069 2070 /* 2071 * If had a history command :p modifier then this is as far as we 2072 * should go 2073 */ 2074 if (justpr) 2075 reset(); 2076 2077 /* 2078 * If had a tellwhat from twenex() then do 2079 */ 2080 if (tellwhat) { 2081 (void) tellmewhat(¶ml, NULL); 2082 reset(); 2083 } 2084 2085 alias(¶ml); 2086 2087 #ifdef BSDJOBS 2088 /* 2089 * If we are interactive, try to continue jobs that we have stopped 2090 */ 2091 if (prompt) 2092 continue_jobs(¶ml); 2093 #endif /* BSDJOBS */ 2094 2095 /* 2096 * Check to see if the user typed "rm * .o" or something 2097 */ 2098 if (prompt) 2099 rmstar(¶ml); 2100 /* 2101 * Parse the words of the input into a parse tree. 2102 */ 2103 savet = syntax(paraml.next, ¶ml, 0); 2104 if (seterr) 2105 stderror(ERR_OLD); 2106 2107 postcmd(); 2108 /* 2109 * Execute the parse tree From: Michael Schroeder 2110 * <mlschroe@immd4.informatik.uni-erlangen.de> was execute(t, tpgrp); 2111 */ 2112 execute(savet, (tpgrp > 0 ? tpgrp : -1), NULL, NULL); 2113 2114 /* 2115 * Made it! 2116 */ 2117 freelex(¶ml); 2118 freesyn(savet), savet = NULL; 2119 #ifdef SIG_WINDOW 2120 if (catch && intty && !whyles && !tellwhat) 2121 (void) window_change(0); /* for window systems */ 2122 #endif /* SIG_WINDOW */ 2123 set(STR_, Strsave(InputBuf), VAR_READWRITE | VAR_NOGLOB); 2124 } 2125 savet = t; 2126 resexit(osetexit); 2127 } 2128 2129 /*ARGSUSED*/ 2130 void 2131 dosource(t, c) 2132 register Char **t; 2133 struct command *c; 2134 { 2135 register Char *f; 2136 bool hflg = 0; 2137 extern int bequiet; 2138 char buf[BUFSIZE]; 2139 2140 USE(c); 2141 t++; 2142 if (*t && eq(*t, STRmh)) { 2143 if (*++t == NULL) 2144 stderror(ERR_NAME | ERR_HFLAG); 2145 hflg++; 2146 } 2147 else if (*t && eq(*t, STRmm)) { 2148 if (*++t == NULL) 2149 stderror(ERR_NAME | ERR_MFLAG); 2150 hflg = 2; 2151 } 2152 2153 f = globone(*t++, G_ERROR); 2154 (void) strcpy(buf, short2str(f)); 2155 xfree((ptr_t) f); 2156 if ((!srcfile(buf, 0, hflg, t)) && (!hflg) && (!bequiet)) 2157 stderror(ERR_SYSTEM, buf, strerror(errno)); 2158 } 2159 2160 /* 2161 * Check for mail. 2162 * If we are a login shell, then we don't want to tell 2163 * about any mail file unless its been modified 2164 * after the time we started. 2165 * This prevents us from telling the user things he already 2166 * knows, since the login program insists on saying 2167 * "You have mail." 2168 */ 2169 2170 /* 2171 * The AMS version. 2172 * This version checks if the file is a directory, and if so, 2173 * tells you the number of files in it, otherwise do the old thang. 2174 * The magic "+1" in the time calculation is to compensate for 2175 * an AFS bug where directory mtimes are set to 1 second in 2176 * the future. 2177 */ 2178 2179 static void 2180 mailchk() 2181 { 2182 register struct varent *v; 2183 register Char **vp; 2184 time_t t; 2185 int intvl, cnt; 2186 struct stat stb; 2187 bool new; 2188 2189 v = adrof(STRmail); 2190 if (v == 0) 2191 return; 2192 (void) time(&t); 2193 vp = v->vec; 2194 cnt = blklen(vp); 2195 intvl = (cnt && number(*vp)) ? (--cnt, getn(*vp++)) : MAILINTVL; 2196 if (intvl < 1) 2197 intvl = 1; 2198 if (chktim + intvl > t) 2199 return; 2200 for (; *vp; vp++) { 2201 char *filename = short2str(*vp); 2202 char *mboxdir = filename; 2203 2204 if (stat(filename, &stb) < 0) 2205 continue; 2206 #if defined(BSDTIMES) || defined(_SEQUENT_) 2207 new = stb.st_mtime > time0.tv_sec; 2208 #else 2209 new = stb.st_mtime > seconds0; 2210 #endif 2211 if (S_ISDIR(stb.st_mode)) { 2212 DIR *mailbox; 2213 int mailcount = 0; 2214 char tempfilename[MAXPATHLEN]; 2215 struct stat stc; 2216 2217 xsnprintf(tempfilename, MAXPATHLEN, "%s/new", filename); 2218 2219 if (stat(tempfilename, &stc) != -1 && S_ISDIR(stc.st_mode)) { 2220 /* 2221 * "filename/new" exists and is a directory; you are 2222 * using Qmail. 2223 */ 2224 stb = stc; 2225 #if defined(BSDTIMES) || defined(_SEQUENT_) 2226 new = stb.st_mtime > time0.tv_sec; 2227 #else 2228 new = stb.st_mtime > seconds0; 2229 #endif 2230 mboxdir = tempfilename; 2231 } 2232 2233 if (stb.st_mtime <= chktim + 1 || (loginsh && !new)) 2234 continue; 2235 2236 if ((mailbox = opendir(mboxdir)) == NULL) 2237 continue; 2238 2239 /* skip . and .. */ 2240 if (!readdir(mailbox) || !readdir(mailbox)) 2241 continue; 2242 2243 while (readdir(mailbox)) 2244 mailcount++; 2245 2246 if (mailcount == 0) 2247 continue; 2248 2249 if (cnt == 1) 2250 xprintf(CGETS(11, 3, "You have %d mail messages.\n"), 2251 mailcount); 2252 else 2253 xprintf(CGETS(11, 4, "You have %d mail messages in %s.\n"), 2254 mailcount, filename); 2255 } 2256 else { 2257 if (stb.st_size == 0 || stb.st_atime > stb.st_mtime || 2258 (stb.st_atime <= chktim && stb.st_mtime <= chktim) || 2259 (loginsh && !new)) 2260 continue; 2261 if (cnt == 1) 2262 xprintf(CGETS(11, 5, "You have %smail.\n"), 2263 new ? CGETS(11, 6, "new ") : ""); 2264 else 2265 xprintf(CGETS(11, 7, "You have %smail in %s.\n"), 2266 new ? CGETS(11, 6, "new ") : "", filename); 2267 } 2268 } 2269 chktim = t; 2270 } 2271 2272 /* 2273 * Extract a home directory from the password file 2274 * The argument points to a buffer where the name of the 2275 * user whose home directory is sought is currently. 2276 * We write the home directory of the user back there. 2277 */ 2278 int 2279 gethdir(home) 2280 Char *home; 2281 { 2282 Char *h; 2283 2284 /* 2285 * Is it us? 2286 */ 2287 if (*home == '\0') { 2288 if ((h = varval(STRhome)) != STRNULL) { 2289 (void) Strcpy(home, h); 2290 return 0; 2291 } 2292 else 2293 return 1; 2294 } 2295 2296 /* 2297 * Look in the cache 2298 */ 2299 if ((h = gettilde(home)) == NULL) 2300 return 1; 2301 else { 2302 (void) Strcpy(home, h); 2303 return 0; 2304 } 2305 } 2306 2307 /* 2308 * Move the initial descriptors to their eventual 2309 * resting places, closing all other units. 2310 */ 2311 void 2312 initdesc() 2313 { 2314 #ifdef NLS_BUGS 2315 #ifdef NLS_CATALOGS 2316 (void)catclose(catd); 2317 #endif /* NLS_CATALOGS */ 2318 #endif /* NLS_BUGS */ 2319 2320 2321 didfds = 0; /* 0, 1, 2 aren't set up */ 2322 (void) close_on_exec(SHIN = dcopy(0, FSHIN), 1); 2323 (void) close_on_exec(SHOUT = dcopy(1, FSHOUT), 1); 2324 (void) close_on_exec(SHDIAG = dcopy(2, FSHDIAG), 1); 2325 (void) close_on_exec(OLDSTD = dcopy(SHIN, FOLDSTD), 1); 2326 #ifndef CLOSE_ON_EXEC 2327 didcch = 0; /* Havent closed for child */ 2328 #endif /* CLOSE_ON_EXEC */ 2329 isdiagatty = isatty(SHDIAG); 2330 isoutatty = isatty(SHOUT); 2331 closem(); 2332 #ifdef NLS_BUGS 2333 #ifdef NLS_CATALOGS 2334 nlsinit(); 2335 #endif /* NLS_CATALOGS */ 2336 #endif /* NLS_BUGS */ 2337 } 2338 2339 2340 void 2341 #ifdef PROF 2342 done(i) 2343 #else 2344 xexit(i) 2345 #endif 2346 int i; 2347 { 2348 #ifdef TESLA 2349 if (loginsh && do_logout) { 2350 /* this is to send hangup signal to the develcon */ 2351 /* we toggle DTR. clear dtr - sleep 1 - set dtr */ 2352 /* ioctl will return ENOTTY for pty's but we ignore it */ 2353 /* exitstat will run after disconnect */ 2354 /* we sleep for 2 seconds to let things happen in */ 2355 /* .logout and rechist() */ 2356 #ifdef TIOCCDTR 2357 (void) sleep(2); 2358 (void) ioctl(FSHTTY, TIOCCDTR, NULL); 2359 (void) sleep(1); 2360 (void) ioctl(FSHTTY, TIOCSDTR, NULL); 2361 #endif /* TIOCCDTR */ 2362 } 2363 #endif /* TESLA */ 2364 2365 { 2366 struct process *pp, *np; 2367 2368 /* Kill all processes marked for hup'ing */ 2369 for (pp = proclist.p_next; pp; pp = pp->p_next) { 2370 np = pp; 2371 do 2372 if ((np->p_flags & PHUP) && np->p_jobid != shpgrp) { 2373 if (killpg(np->p_jobid, SIGHUP) != -1) { 2374 /* In case the job was suspended... */ 2375 #ifdef SIGCONT 2376 (void) killpg(np->p_jobid, SIGCONT); 2377 #endif 2378 break; 2379 } 2380 } 2381 while ((np = np->p_friends) != pp); 2382 } 2383 } 2384 untty(); 2385 #ifdef NLS_CATALOGS 2386 /* 2387 * We need to call catclose, because SVR4 leaves symlinks behind otherwise 2388 * in the catalog directories. We cannot close on a vforked() child, 2389 * because messages will stop working on the parent too. 2390 */ 2391 if (child == 0) 2392 (void) catclose(catd); 2393 #endif /* NLS_CATALOGS */ 2394 #ifdef WINNT_NATIVE 2395 nt_cleanup(); 2396 #endif /* WINNT_NATIVE */ 2397 _exit(i); 2398 } 2399 2400 #ifndef _PATH_DEFPATH 2401 static Char ** 2402 defaultpath() 2403 { 2404 char *ptr; 2405 Char **blk, **blkp; 2406 struct stat stb; 2407 2408 blkp = blk = (Char **) xmalloc((size_t) sizeof(Char *) * 10); 2409 2410 #ifndef NODOT 2411 # ifndef DOTLAST 2412 *blkp++ = Strsave(STRdot); 2413 # endif 2414 #endif 2415 2416 #define DIRAPPEND(a) \ 2417 if (stat(ptr = a, &stb) == 0 && S_ISDIR(stb.st_mode)) \ 2418 *blkp++ = SAVE(ptr) 2419 2420 #ifdef _PATH_LOCAL 2421 DIRAPPEND(_PATH_LOCAL); 2422 #endif 2423 2424 #ifdef _PATH_USRUCB 2425 DIRAPPEND(_PATH_USRUCB); 2426 #endif 2427 2428 #ifdef _PATH_USRBSD 2429 DIRAPPEND(_PATH_USRBSD); 2430 #endif 2431 2432 #ifdef _PATH_BIN 2433 DIRAPPEND(_PATH_BIN); 2434 #endif 2435 2436 #ifdef _PATH_USRBIN 2437 DIRAPPEND(_PATH_USRBIN); 2438 #endif 2439 2440 #undef DIRAPPEND 2441 2442 #ifndef NODOT 2443 # ifdef DOTLAST 2444 *blkp++ = Strsave(STRdot); 2445 # endif 2446 #endif 2447 *blkp = NULL; 2448 return (blk); 2449 } 2450 #endif 2451 2452 static void 2453 record() 2454 { 2455 if (!fast) { 2456 recdirs(NULL, adrof(STRsavedirs) != NULL); 2457 rechist(NULL, adrof(STRsavehist) != NULL); 2458 } 2459 } 2460