1 /* $Header: /p/tcsh/cvsroot/tcsh/sh.c,v 3.145 2009/06/25 21:15:37 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. Neither the name of the University nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 */ 33 #define EXTERN /* Intern */ 34 #include "sh.h" 35 36 #ifndef lint 37 char copyright[] = 38 "@(#) Copyright (c) 1991 The Regents of the University of California.\n\ 39 All rights reserved.\n"; 40 #endif /* not lint */ 41 42 RCSID("$tcsh: sh.c,v 3.145 2009/06/25 21:15:37 christos Exp $") 43 44 #include "tc.h" 45 #include "ed.h" 46 #include "tw.h" 47 48 extern int MapsAreInited; 49 extern int NLSMapsAreInited; 50 51 /* 52 * C Shell 53 * 54 * Bill Joy, UC Berkeley, California, USA 55 * October 1978, May 1980 56 * 57 * Jim Kulp, IIASA, Laxenburg, Austria 58 * April 1980 59 * 60 * Filename recognition added: 61 * Ken Greer, Ind. Consultant, Palo Alto CA 62 * October 1983. 63 * 64 * Karl Kleinpaste, Computer Consoles, Inc. 65 * Added precmd, periodic/tperiod, prompt changes, 66 * directory stack hack, and login watch. 67 * Sometime March 1983 - Feb 1984. 68 * 69 * Added scheduled commands, including the "sched" command, 70 * plus the call to sched_run near the precmd et al 71 * routines. 72 * Upgraded scheduled events for running events while 73 * sitting idle at command input. 74 * 75 * Paul Placeway, Ohio State 76 * added stuff for running with twenex/inputl 9 Oct 1984. 77 * 78 * ported to Apple Unix (TM) (OREO) 26 -- 29 Jun 1987 79 */ 80 81 jmp_buf_t reslab INIT_ZERO_STRUCT; 82 83 static const char tcshstr[] = "tcsh"; 84 85 struct sigaction parintr; /* Parents interrupt catch */ 86 struct sigaction parterm; /* Parents terminate catch */ 87 88 #ifdef TESLA 89 int do_logout = 0; 90 #endif /* TESLA */ 91 92 93 int use_fork = 0; /* use fork() instead of vfork()? */ 94 95 /* 96 * Magic pointer values. Used to specify other invalid conditions aside 97 * from null. 98 */ 99 static Char INVCHAR; 100 Char *INVPTR = &INVCHAR; 101 Char **INVPPTR = &INVPTR; 102 103 static int fast = 0; 104 static int mflag = 0; 105 static int prompt = 1; 106 int enterhist = 0; 107 int tellwhat = 0; 108 time_t t_period; 109 Char *ffile = NULL; 110 int dolzero = 0; 111 int insource = 0; 112 int exitset = 0; 113 static time_t chktim; /* Time mail last checked */ 114 char *progname; 115 int tcsh; 116 117 /* 118 * This preserves the input state of the shell. It is used by 119 * st_save and st_restore to manupulate shell state. 120 */ 121 struct saved_state { 122 int insource; 123 int OLDSTD; 124 int SHIN; 125 int SHOUT; 126 int SHDIAG; 127 int intty; 128 struct whyle *whyles; 129 Char *gointr; 130 Char *arginp; 131 Char *evalp; 132 Char **evalvec; 133 Char *alvecp; 134 Char **alvec; 135 int onelflg; 136 int enterhist; 137 Char **argv; 138 Char **av; 139 Char HIST; 140 int cantell; 141 struct Bin B; 142 int justpr; 143 }; 144 145 static int srccat (Char *, Char *); 146 #ifndef WINNT_NATIVE 147 static int srcfile (const char *, int, int, Char **); 148 #else 149 int srcfile (const char *, int, int, Char **); 150 #endif /*WINNT_NATIVE*/ 151 static void srcunit (int, int, int, Char **); 152 static void mailchk (void); 153 #ifndef _PATH_DEFPATH 154 static Char **defaultpath (void); 155 #endif 156 static void record (void); 157 static void st_save (struct saved_state *, int, int, 158 Char **, Char **); 159 static void st_restore (void *); 160 161 int main (int, char **); 162 163 int 164 main(int argc, char **argv) 165 { 166 int batch = 0; 167 volatile int nexececho = 0; 168 int nofile = 0; 169 volatile int nverbose = 0; 170 volatile int rdirs = 0; 171 int quitit = 0; 172 Char *cp; 173 #ifdef AUTOLOGOUT 174 Char *cp2; 175 #endif 176 char *tcp, *ttyn; 177 int f, reenter; 178 char **tempv; 179 int osetintr; 180 struct sigaction oparintr; 181 182 #ifdef WINNT_NATIVE 183 nt_init(); 184 #endif /* WINNT_NATIVE */ 185 #if defined(NLS_CATALOGS) && defined(LC_MESSAGES) 186 (void) setlocale(LC_MESSAGES, ""); 187 #endif /* NLS_CATALOGS && LC_MESSAGES */ 188 189 #ifdef NLS 190 # ifdef LC_CTYPE 191 (void) setlocale(LC_CTYPE, ""); /* for iscntrl */ 192 # endif /* LC_CTYPE */ 193 #endif /* NLS */ 194 195 nlsinit(); 196 197 #ifdef MALLOC_TRACE 198 mal_setstatsfile(fdopen(dmove(xopen("/tmp/tcsh.trace", 199 O_WRONLY|O_CREAT|O_LARGEFILE, 0666), 25), "w")); 200 mal_trace(1); 201 #endif /* MALLOC_TRACE */ 202 203 #if !(defined(BSDTIMES) || defined(_SEQUENT_)) && defined(POSIX) 204 # ifdef _SC_CLK_TCK 205 clk_tck = (clock_t) sysconf(_SC_CLK_TCK); 206 # else /* ! _SC_CLK_TCK */ 207 # ifdef CLK_TCK 208 clk_tck = CLK_TCK; 209 # else /* !CLK_TCK */ 210 clk_tck = HZ; 211 # endif /* CLK_TCK */ 212 # endif /* _SC_CLK_TCK */ 213 #endif /* !BSDTIMES && POSIX */ 214 215 settimes(); /* Immed. estab. timing base */ 216 #ifdef TESLA 217 do_logout = 0; 218 #endif /* TESLA */ 219 220 /* 221 * Make sure we have 0, 1, 2 open 222 * Otherwise `` jobs will not work... (From knaff@poly.polytechnique.fr) 223 */ 224 { 225 do 226 if ((f = xopen(_PATH_DEVNULL, O_RDONLY|O_LARGEFILE)) == -1 && 227 (f = xopen("/", O_RDONLY|O_LARGEFILE)) == -1) 228 exit(1); 229 while (f < 3); 230 xclose(f); 231 } 232 233 osinit(); /* Os dependent initialization */ 234 235 236 { 237 char *t; 238 239 t = strrchr(argv[0], '/'); 240 #ifdef WINNT_NATIVE 241 { 242 char *s = strrchr(argv[0], '\\'); 243 if (s) 244 t = s; 245 } 246 #endif /* WINNT_NATIVE */ 247 t = t ? t + 1 : argv[0]; 248 if (*t == '-') t++; 249 progname = strsave((t && *t) ? t : tcshstr); /* never want a null */ 250 tcsh = strcmp(progname, tcshstr) == 0; 251 } 252 253 /* 254 * Initialize non constant strings 255 */ 256 #ifdef _PATH_BSHELL 257 STR_BSHELL = SAVE(_PATH_BSHELL); 258 #endif 259 #ifdef _PATH_TCSHELL 260 STR_SHELLPATH = SAVE(_PATH_TCSHELL); 261 #else 262 # ifdef _PATH_CSHELL 263 STR_SHELLPATH = SAVE(_PATH_CSHELL); 264 # endif 265 #endif 266 STR_environ = blk2short(environ); 267 environ = short2blk(STR_environ); /* So that we can free it */ 268 STR_WORD_CHARS = SAVE(WORD_CHARS); 269 270 HIST = '!'; 271 HISTSUB = '^'; 272 PRCH = '>'; 273 PRCHROOT = '#'; 274 word_chars = STR_WORD_CHARS; 275 bslash_quote = 0; /* PWP: do tcsh-style backslash quoting? */ 276 277 /* Default history size to 100 */ 278 setcopy(STRhistory, str2short("100"), VAR_READWRITE); 279 280 tempv = argv; 281 ffile = SAVE(tempv[0]); 282 dolzero = 0; 283 if (eq(ffile, STRaout)) /* A.out's are quittable */ 284 quitit = 1; 285 uid = getuid(); 286 gid = getgid(); 287 euid = geteuid(); 288 egid = getegid(); 289 /* 290 * We are a login shell if: 1. we were invoked as -<something> with 291 * optional arguments 2. or we were invoked only with the -l flag 292 */ 293 loginsh = (**tempv == '-') || (argc == 2 && 294 tempv[1][0] == '-' && tempv[1][1] == 'l' && 295 tempv[1][2] == '\0'); 296 #ifdef _VMS_POSIX 297 /* No better way to find if we are a login shell */ 298 if (!loginsh) { 299 loginsh = (argc == 1 && getppid() == 1); 300 **tempv = '-'; /* Avoid giving VMS an acidic stomach */ 301 } 302 #endif /* _VMS_POSIX */ 303 304 if (loginsh && **tempv != '-') { 305 char *argv0; 306 307 /* 308 * Mangle the argv space 309 */ 310 tempv[1][0] = '\0'; 311 tempv[1][1] = '\0'; 312 tempv[1] = NULL; 313 argv0 = strspl("-", *tempv); 314 *tempv = argv0; 315 argc--; 316 } 317 if (loginsh) { 318 (void) time(&chktim); 319 setNS(STRloginsh); 320 } 321 322 AsciiOnly = 1; 323 NoNLSRebind = getenv("NOREBIND") != NULL; 324 #ifdef NLS 325 # ifdef SETLOCALEBUG 326 dont_free = 1; 327 # endif /* SETLOCALEBUG */ 328 (void) setlocale(LC_ALL, ""); 329 # ifdef LC_COLLATE 330 (void) setlocale(LC_COLLATE, ""); 331 # endif 332 # ifdef SETLOCALEBUG 333 dont_free = 0; 334 # endif /* SETLOCALEBUG */ 335 # ifdef STRCOLLBUG 336 fix_strcoll_bug(); 337 # endif /* STRCOLLBUG */ 338 339 { 340 int k; 341 342 for (k = 0200; k <= 0377 && !Isprint(CTL_ESC(k)); k++) 343 continue; 344 AsciiOnly = MB_CUR_MAX == 1 && k > 0377; 345 } 346 #else 347 AsciiOnly = getenv("LANG") == NULL && getenv("LC_CTYPE") == NULL; 348 #endif /* NLS */ 349 if (MapsAreInited && !NLSMapsAreInited) 350 ed_InitNLSMaps(); 351 ResetArrowKeys(); 352 353 /* 354 * Initialize for periodic command intervals. Also, initialize the dummy 355 * tty list for login-watch. 356 */ 357 (void) time(&t_period); 358 #ifndef HAVENOUTMP 359 initwatch(); 360 #endif /* !HAVENOUTMP */ 361 362 #if defined(alliant) 363 /* 364 * From: Jim Pace <jdp@research.att.com> 365 * tcsh does not work properly on the alliants through an rlogin session. 366 * The shell generally hangs. Also, reference to the controlling terminal 367 * does not work ( ie: echo foo > /dev/tty ). 368 * 369 * A security feature was added to rlogind affecting FX/80's Concentrix 370 * from revision 5.5.xx upwards (through 5.7 where this fix was implemented) 371 * This security change also affects the FX/2800 series. 372 * The security change to rlogind requires the process group of an rlogin 373 * session become disassociated with the tty in rlogind. 374 * 375 * The changes needed are: 376 * 1. set the process group 377 * 2. reenable the control terminal 378 */ 379 if (loginsh && isatty(SHIN)) { 380 ttyn = ttyname(SHIN); 381 xclose(SHIN); 382 SHIN = xopen(ttyn, O_RDWR|O_LARGEFILE); 383 shpgrp = getpid(); 384 (void) ioctl (SHIN, TIOCSPGRP, (ioctl_t) &shpgrp); 385 (void) setpgid(0, shpgrp); 386 } 387 #endif /* alliant */ 388 389 /* 390 * Move the descriptors to safe places. The variable didfds is 0 while we 391 * have only FSH* to work with. When didfds is true, we have 0,1,2 and 392 * prefer to use these. 393 */ 394 initdesc(); 395 396 /* 397 * Get and set the tty now 398 */ 399 if ((ttyn = ttyname(SHIN)) != NULL) { 400 /* 401 * Could use rindex to get rid of other possible path components, but 402 * hpux preserves the subdirectory /pty/ when storing the tty name in 403 * utmp, so we keep it too. 404 */ 405 if (strncmp(ttyn, "/dev/", 5) == 0) 406 setv(STRtty, cp = SAVE(ttyn + 5), VAR_READWRITE); 407 else 408 setv(STRtty, cp = SAVE(ttyn), VAR_READWRITE); 409 } 410 else 411 setv(STRtty, cp = SAVE(""), VAR_READWRITE); 412 /* 413 * Initialize the shell variables. ARGV and PROMPT are initialized later. 414 * STATUS is also munged in several places. CHILD is munged when 415 * forking/waiting 416 */ 417 418 /* 419 * 7-10-87 Paul Placeway autologout should be set ONLY on login shells and 420 * on shells running as root. Out of these, autologout should NOT be set 421 * for any psudo-terminals (this catches most window systems) and not for 422 * any terminal running X windows. 423 * 424 * At Ohio State, we have had problems with a user having his X session 425 * drop out from under him (on a Sun) because the shell in his master 426 * xterm timed out and exited. 427 * 428 * Really, this should be done with a program external to the shell, that 429 * watches for no activity (and NO running programs, such as dump) on a 430 * terminal for a long peroid of time, and then SIGHUPS the shell on that 431 * terminal. 432 * 433 * bugfix by Rich Salz <rsalz@PINEAPPLE.BBN.COM>: For root rsh things 434 * allways first check to see if loginsh or really root, then do things 435 * with ttyname() 436 * 437 * Also by Jean-Francois Lamy <lamy%ai.toronto.edu@RELAY.CS.NET>: check the 438 * value of cp before using it! ("root can rsh too") 439 * 440 * PWP: keep the nested ifs; the order of the tests matters and a good 441 * (smart) C compiler might re-arange things wrong. 442 */ 443 #ifdef AUTOLOGOUT 444 # ifdef convex 445 if (uid == 0) 446 /* root always has a 15 minute autologout */ 447 setcopy(STRautologout, STRrootdefautologout, VAR_READWRITE); 448 else 449 if (loginsh) 450 /* users get autologout set to 0 */ 451 setcopy(STRautologout, STR0, VAR_READWRITE); 452 # else /* convex */ 453 if (loginsh || (uid == 0)) { 454 if (*cp) { 455 /* only for login shells or root and we must have a tty */ 456 if ((cp2 = Strrchr(cp, (Char) '/')) != NULL) { 457 cp2 = cp2 + 1; 458 } 459 else 460 cp2 = cp; 461 if (!(((Strncmp(cp2, STRtty, 3) == 0) && Isalpha(cp2[3])) || 462 Strstr(cp, STRptssl) != NULL)) { 463 if (getenv("DISPLAY") == NULL) { 464 /* NOT on X window shells */ 465 setcopy(STRautologout, STRdefautologout, VAR_READWRITE); 466 } 467 } 468 } 469 } 470 # endif /* convex */ 471 #endif /* AUTOLOGOUT */ 472 473 sigset_interrupting(SIGALRM, queue_alrmcatch); 474 475 setcopy(STRstatus, STR0, VAR_READWRITE); 476 477 /* 478 * get and set machine specific environment variables 479 */ 480 getmachine(); 481 482 483 /* 484 * Publish the selected echo style 485 */ 486 #if ECHO_STYLE != BSD_ECHO 487 if (tcsh) { 488 # if ECHO_STYLE == NONE_ECHO 489 setcopy(STRecho_style, STRnone, VAR_READWRITE); 490 # endif /* ECHO_STYLE == NONE_ECHO */ 491 # if ECHO_STYLE == SYSV_ECHO 492 setcopy(STRecho_style, STRsysv, VAR_READWRITE); 493 # endif /* ECHO_STYLE == SYSV_ECHO */ 494 # if ECHO_STYLE == BOTH_ECHO 495 setcopy(STRecho_style, STRboth, VAR_READWRITE); 496 # endif /* ECHO_STYLE == BOTH_ECHO */ 497 } else 498 #endif /* ECHO_STYLE != BSD_ECHO */ 499 setcopy(STRecho_style, STRbsd, VAR_READWRITE); 500 501 /* 502 * increment the shell level. 503 */ 504 shlvl(1); 505 506 if ((tcp = getenv("HOME")) != NULL) 507 cp = quote(SAVE(tcp)); 508 else 509 cp = NULL; 510 511 if (cp == NULL) 512 fast = 1; /* No home -> can't read scripts */ 513 else 514 setv(STRhome, cp, VAR_READWRITE); 515 516 dinit(cp); /* dinit thinks that HOME == cwd in a login 517 * shell */ 518 /* 519 * Grab other useful things from the environment. Should we grab 520 * everything?? 521 */ 522 { 523 char *cln, *cus, *cgr; 524 struct passwd *pw; 525 struct group *gr; 526 527 528 #ifdef apollo 529 int oid = getoid(); 530 531 setv(STRoid, Itoa(oid, 0, 0), VAR_READWRITE); 532 #endif /* apollo */ 533 534 setv(STRuid, Itoa(uid, 0, 0), VAR_READWRITE); 535 536 setv(STRgid, Itoa(gid, 0, 0), VAR_READWRITE); 537 538 cln = getenv("LOGNAME"); 539 cus = getenv("USER"); 540 if (cus != NULL) 541 setv(STRuser, quote(SAVE(cus)), VAR_READWRITE); 542 else if (cln != NULL) 543 setv(STRuser, quote(SAVE(cln)), VAR_READWRITE); 544 else if ((pw = xgetpwuid(uid)) == NULL) 545 setcopy(STRuser, str2short("unknown"), VAR_READWRITE); 546 else 547 setcopy(STRuser, str2short(pw->pw_name), VAR_READWRITE); 548 if (cln == NULL) 549 tsetenv(STRLOGNAME, varval(STRuser)); 550 if (cus == NULL) 551 tsetenv(STRKUSER, varval(STRuser)); 552 553 cgr = getenv("GROUP"); 554 if (cgr != NULL) 555 setv(STRgroup, quote(SAVE(cgr)), VAR_READWRITE); 556 else if ((gr = xgetgrgid(gid)) == NULL) 557 setcopy(STRgroup, str2short("unknown"), VAR_READWRITE); 558 else 559 setcopy(STRgroup, str2short(gr->gr_name), VAR_READWRITE); 560 if (cgr == NULL) 561 tsetenv(STRKGROUP, varval(STRgroup)); 562 } 563 564 /* 565 * HOST may be wrong, since rexd transports the entire environment on sun 566 * 3.x Just set it again 567 */ 568 { 569 char cbuff[MAXHOSTNAMELEN]; 570 571 if (gethostname(cbuff, sizeof(cbuff)) >= 0) { 572 cbuff[sizeof(cbuff) - 1] = '\0'; /* just in case */ 573 tsetenv(STRHOST, str2short(cbuff)); 574 } 575 else 576 tsetenv(STRHOST, str2short("unknown")); 577 } 578 579 580 #ifdef REMOTEHOST 581 /* 582 * Try to determine the remote host we were logged in from. 583 */ 584 remotehost(); 585 #endif /* REMOTEHOST */ 586 587 #ifdef apollo 588 if ((tcp = getenv("SYSTYPE")) == NULL) 589 tcp = "bsd4.3"; 590 tsetenv(STRSYSTYPE, quote(str2short(tcp))); 591 #endif /* apollo */ 592 593 /* 594 * set editing on by default, unless running under Emacs as an inferior 595 * shell. 596 * We try to do this intelligently. If $TERM is available, then it 597 * should determine if we should edit or not. $TERM is preserved 598 * across rlogin sessions, so we will not get confused if we rlogin 599 * under an emacs shell. Another advantage is that if we run an 600 * xterm under an emacs shell, then the $TERM will be set to 601 * xterm, so we are going to want to edit. Unfortunately emacs 602 * does not restore all the tty modes, so xterm is not very well 603 * set up. But this is not the shell's fault. 604 * Also don't edit if $TERM == wm, for when we're running under an ATK app. 605 * Finally, emacs compiled under terminfo, sets the terminal to dumb, 606 * so disable editing for that too. 607 * 608 * Unfortunately, in some cases the initial $TERM setting is "unknown", 609 * "dumb", or "network" which is then changed in the user's startup files. 610 * We fix this by setting noediting here if $TERM is unknown/dumb and 611 * if noediting is set, we switch on editing if $TERM is changed. 612 */ 613 if ((tcp = getenv("TERM")) != NULL) { 614 setv(STRterm, quote(SAVE(tcp)), VAR_READWRITE); 615 noediting = strcmp(tcp, "unknown") == 0 || strcmp(tcp, "dumb") == 0 || 616 strcmp(tcp, "network") == 0; 617 editing = strcmp(tcp, "emacs") != 0 && strcmp(tcp, "wm") != 0 && 618 !noediting; 619 } 620 else { 621 noediting = 0; 622 editing = ((tcp = getenv("EMACS")) == NULL || strcmp(tcp, "t") != 0); 623 } 624 625 /* 626 * The 'edit' variable is either set or unset. It doesn't 627 * need a value. Making it 'emacs' might be confusing. 628 */ 629 if (editing) 630 setNS(STRedit); 631 632 633 /* 634 * still more mutability: make the complete routine automatically add the 635 * suffix of file names... 636 */ 637 setNS(STRaddsuffix); 638 639 /* 640 * Compatibility with tcsh >= 6.12 by default 641 */ 642 setNS(STRcsubstnonl); 643 644 /* 645 * Random default kill ring size 646 */ 647 setcopy(STRkillring, str2short("30"), VAR_READWRITE); 648 649 /* 650 * Re-initialize path if set in environment 651 */ 652 if ((tcp = getenv("PATH")) == NULL) { 653 #ifdef _PATH_DEFPATH 654 importpath(str2short(_PATH_DEFPATH)); 655 #else /* !_PATH_DEFPATH */ 656 setq(STRpath, defaultpath(), &shvhed, VAR_READWRITE); 657 #endif /* _PATH_DEFPATH */ 658 /* 659 * Export the path setting so that subsequent processes use the same path as we do. 660 */ 661 exportpath(adrof(STRpath)->vec); 662 } else 663 /* Importpath() allocates memory for the path, and the 664 * returned pointer from SAVE() was discarded, so 665 * this was a memory leak.. (sg) 666 * 667 * importpath(SAVE(tcp)); 668 */ 669 importpath(str2short(tcp)); 670 671 672 { 673 /* If the SHELL environment variable ends with "tcsh", set 674 * STRshell to the same path. This is to facilitate using 675 * the executable in environments where the compiled-in 676 * default isn't appropriate (sg). 677 */ 678 679 size_t sh_len = 0; 680 681 if ((tcp = getenv("SHELL")) != NULL) { 682 sh_len = strlen(tcp); 683 if ((sh_len >= 5 && strcmp(tcp + (sh_len - 5), "/tcsh") == 0) || 684 (!tcsh && sh_len >= 4 && strcmp(tcp + (sh_len - 4), "/csh") == 0)) 685 setv(STRshell, quote(SAVE(tcp)), VAR_READWRITE); 686 else 687 sh_len = 0; 688 } 689 if (sh_len == 0) 690 setcopy(STRshell, STR_SHELLPATH, VAR_READWRITE); 691 } 692 693 #ifdef _OSD_POSIX /* BS2000 needs this variable set to "SHELL" */ 694 if ((tcp = getenv("PROGRAM_ENVIRONMENT")) == NULL) 695 tcp = "SHELL"; 696 tsetenv(STRPROGRAM_ENVIRONMENT, quote(str2short(tcp))); 697 #endif /* _OSD_POSIX */ 698 699 #ifdef COLOR_LS_F 700 if ((tcp = getenv("LS_COLORS")) != NULL) 701 parseLS_COLORS(str2short(tcp)); 702 #endif /* COLOR_LS_F */ 703 704 doldol = putn((int) getpid()); /* For $$ */ 705 #ifdef WINNT_NATIVE 706 { 707 char *tmp; 708 Char *tmp2; 709 if ((tmp = getenv("TMP")) != NULL) { 710 tmp = xasprintf("%s/%s", tmp, "sh"); 711 tmp2 = SAVE(tmp); 712 xfree(tmp); 713 } 714 else { 715 tmp2 = SAVE(""); 716 } 717 shtemp = Strspl(tmp2, doldol); /* For << */ 718 xfree(tmp2); 719 } 720 #else /* !WINNT_NATIVE */ 721 shtemp = Strspl(STRtmpsh, doldol); /* For << */ 722 #endif /* WINNT_NATIVE */ 723 724 /* 725 * Record the interrupt states from the parent process. If the parent is 726 * non-interruptible our hand must be forced or we (and our children) won't 727 * be either. Our children inherit termination from our parent. We catch it 728 * only if we are the login shell. 729 */ 730 sigaction(SIGINT, NULL, &parintr); 731 sigaction(SIGTERM, NULL, &parterm); 732 733 734 #ifdef TCF 735 /* Enable process migration on ourselves and our progeny */ 736 (void) signal(SIGMIGRATE, SIG_DFL); 737 #endif /* TCF */ 738 739 /* 740 * dspkanji/dspmbyte autosetting 741 */ 742 /* PATCH IDEA FROM Issei.Suzuki VERY THANKS */ 743 #if defined(DSPMBYTE) 744 #if defined(NLS) && defined(LC_CTYPE) 745 if (((tcp = setlocale(LC_CTYPE, NULL)) != NULL || (tcp = getenv("LANG")) != NULL) && !adrof(CHECK_MBYTEVAR)) { 746 #else 747 if ((tcp = getenv("LANG")) != NULL && !adrof(CHECK_MBYTEVAR)) { 748 #endif 749 autoset_dspmbyte(str2short(tcp)); 750 } 751 #if defined(WINNT_NATIVE) 752 else if (!adrof(CHECK_MBYTEVAR)) 753 nt_autoset_dspmbyte(); 754 #endif /* WINNT_NATIVE */ 755 #endif 756 757 fix_version(); /* publish the shell version */ 758 759 if (argc > 1 && strcmp(argv[1], "--version") == 0) { 760 xprintf("%S\n", varval(STRversion)); 761 xexit(0); 762 } 763 if (argc > 1 && strcmp(argv[1], "--help") == 0) { 764 xprintf("%S\n\n", varval(STRversion)); 765 xprintf("%s", CGETS(11, 8, HELP_STRING)); 766 xexit(0); 767 } 768 /* 769 * Process the arguments. 770 * 771 * Note that processing of -v/-x is actually delayed till after script 772 * processing. 773 * 774 * We set the first character of our name to be '-' if we are a shell 775 * running interruptible commands. Many programs which examine ps'es 776 * use this to filter such shells out. 777 */ 778 argc--, tempv++; 779 while (argc > 0 && (tcp = tempv[0])[0] == '-' && 780 *++tcp != '\0' && !batch) { 781 do 782 switch (*tcp++) { 783 784 case 0: /* - Interruptible, no prompt */ 785 prompt = 0; 786 setintr = 1; 787 nofile = 1; 788 break; 789 790 case 'b': /* -b Next arg is input file */ 791 batch = 1; 792 break; 793 794 case 'c': /* -c Command input from arg */ 795 if (argc == 1) 796 xexit(0); 797 argc--, tempv++; 798 #ifdef M_XENIX 799 /* Xenix Vi bug: 800 it relies on a 7 bit environment (/bin/sh), so it 801 pass ascii arguments with the 8th bit set */ 802 if (!strcmp(argv[0], "sh")) 803 { 804 char *p; 805 806 for (p = tempv[0]; *p; ++p) 807 *p &= ASCII; 808 } 809 #endif 810 arginp = SAVE(tempv[0]); 811 812 /* 813 * we put the command into a variable 814 */ 815 if (arginp != NULL) 816 setv(STRcommand, quote(Strsave(arginp)), VAR_READWRITE); 817 818 /* 819 * * Give an error on -c arguments that end in * backslash to 820 * ensure that you don't make * nonportable csh scripts. 821 */ 822 { 823 int count; 824 825 cp = Strend(arginp); 826 count = 0; 827 while (cp > arginp && *--cp == '\\') 828 ++count; 829 if ((count & 1) != 0) { 830 exiterr = 1; 831 stderror(ERR_ARGC); 832 } 833 } 834 prompt = 0; 835 nofile = 1; 836 break; 837 case 'd': /* -d Load directory stack from file */ 838 rdirs = 1; 839 break; 840 841 #ifdef apollo 842 case 'D': /* -D Define environment variable */ 843 { 844 Char *dp; 845 846 cp = str2short(tcp); 847 if (dp = Strchr(cp, '=')) { 848 *dp++ = '\0'; 849 tsetenv(cp, dp); 850 } 851 else 852 tsetenv(cp, STRNULL); 853 } 854 *tcp = '\0'; /* done with this argument */ 855 break; 856 #endif /* apollo */ 857 858 case 'e': /* -e Exit on any error */ 859 exiterr = 1; 860 break; 861 862 case 'f': /* -f Fast start */ 863 fast = 1; 864 break; 865 866 case 'i': /* -i Interactive, even if !intty */ 867 intact = 1; 868 nofile = 1; 869 break; 870 871 case 'm': /* -m read .cshrc (from su) */ 872 mflag = 1; 873 break; 874 875 case 'n': /* -n Don't execute */ 876 noexec = 1; 877 break; 878 879 case 'q': /* -q (Undoc'd) ... die on quit */ 880 quitit = 1; 881 break; 882 883 case 's': /* -s Read from std input */ 884 nofile = 1; 885 break; 886 887 case 't': /* -t Read one line from input */ 888 onelflg = 2; 889 prompt = 0; 890 nofile = 1; 891 break; 892 893 case 'v': /* -v Echo hist expanded input */ 894 nverbose = 1; /* ... later */ 895 break; 896 897 case 'x': /* -x Echo just before execution */ 898 nexececho = 1; /* ... later */ 899 break; 900 901 case 'V': /* -V Echo hist expanded input */ 902 setNS(STRverbose); /* NOW! */ 903 break; 904 905 case 'X': /* -X Echo just before execution */ 906 setNS(STRecho); /* NOW! */ 907 break; 908 909 case 'F': 910 /* 911 * This will cause children to be created using fork instead of 912 * vfork. 913 */ 914 use_fork = 1; 915 break; 916 917 case ' ': 918 case '\t': 919 /* 920 * for O/S's that don't do the argument parsing right in 921 * "#!/foo -f " scripts 922 */ 923 break; 924 925 default: /* Unknown command option */ 926 exiterr = 1; 927 stderror(ERR_TCSHUSAGE, tcp-1, progname); 928 break; 929 930 } while (*tcp); 931 tempv++, argc--; 932 } 933 934 if (quitit) /* With all due haste, for debugging */ 935 (void) signal(SIGQUIT, SIG_DFL); 936 937 /* 938 * Unless prevented by -, -c, -i, -s, or -t, if there are remaining 939 * arguments the first of them is the name of a shell file from which to 940 * read commands. 941 */ 942 if (nofile == 0 && argc > 0) { 943 nofile = xopen(tempv[0], O_RDONLY|O_LARGEFILE); 944 if (nofile < 0) { 945 child = 1; /* So this ... */ 946 /* ... doesn't return */ 947 stderror(ERR_SYSTEM, tempv[0], strerror(errno)); 948 } 949 xfree(ffile); 950 dolzero = 1; 951 ffile = SAVE(tempv[0]); 952 /* 953 * Replace FSHIN. Handle /dev/std{in,out,err} specially 954 * since once they are closed we cannot open them again. 955 * In that case we use our own saved descriptors 956 */ 957 if ((SHIN = dmove(nofile, FSHIN)) < 0) 958 switch(nofile) { 959 case 0: 960 SHIN = FSHIN; 961 break; 962 case 1: 963 SHIN = FSHOUT; 964 break; 965 case 2: 966 SHIN = FSHDIAG; 967 break; 968 default: 969 stderror(ERR_SYSTEM, tempv[0], strerror(errno)); 970 break; 971 } 972 (void) close_on_exec(SHIN, 1); 973 prompt = 0; 974 /* argc not used any more */ tempv++; 975 } 976 977 /* 978 * Call to closem() used to be part of initdesc(). Now called below where 979 * the script name argument has become stdin. Kernel may have used a file 980 * descriptor to hold the name of the script (setuid case) and this name 981 * mustn't be lost by closing the fd too soon. 982 */ 983 closem(); 984 985 /* 986 * Consider input a tty if it really is or we are interactive. but not for 987 * editing (christos) 988 */ 989 if (!(intty = isatty(SHIN))) { 990 if (adrof(STRedit)) 991 unsetv(STRedit); 992 editing = 0; 993 } 994 intty |= intact; 995 #ifndef convex 996 if (intty || (intact && isatty(SHOUT))) { 997 if (!batch && (uid != euid || gid != egid)) { 998 errno = EACCES; 999 child = 1; /* So this ... */ 1000 /* ... doesn't return */ 1001 stderror(ERR_SYSTEM, progname, strerror(errno)); 1002 } 1003 } 1004 #endif /* convex */ 1005 isoutatty = isatty(SHOUT); 1006 isdiagatty = isatty(SHDIAG); 1007 /* 1008 * Decide whether we should play with signals or not. If we are explicitly 1009 * told (via -i, or -) or we are a login shell (arg0 starts with -) or the 1010 * input and output are both the ttys("csh", or "csh</dev/ttyx>/dev/ttyx") 1011 * Note that in only the login shell is it likely that parent may have set 1012 * signals to be ignored 1013 */ 1014 if (loginsh || intact || (intty && isatty(SHOUT))) 1015 setintr = 1; 1016 settell(); 1017 /* 1018 * Save the remaining arguments in argv. 1019 */ 1020 setq(STRargv, blk2short(tempv), &shvhed, VAR_READWRITE); 1021 1022 /* 1023 * Set up the prompt. 1024 */ 1025 if (prompt) { 1026 if (tcsh) 1027 setcopy(STRprompt, STRdeftcshprompt, VAR_READWRITE); 1028 else 1029 setcopy(STRprompt, STRdefcshprompt, VAR_READWRITE); 1030 /* that's a meta-questionmark */ 1031 setcopy(STRprompt2, STRmquestion, VAR_READWRITE); 1032 setcopy(STRprompt3, STRKCORRECT, VAR_READWRITE); 1033 } 1034 1035 /* 1036 * If we are an interactive shell, then start fiddling with the signals; 1037 * this is a tricky game. 1038 */ 1039 shpgrp = mygetpgrp(); 1040 opgrp = tpgrp = -1; 1041 if (setintr) { 1042 struct sigaction osig; 1043 1044 **argv = '-'; 1045 if (!quitit) /* Wary! */ 1046 (void) signal(SIGQUIT, SIG_IGN); 1047 pintr_disabled = 1; 1048 sigset_interrupting(SIGINT, queue_pintr); 1049 (void) signal(SIGTERM, SIG_IGN); 1050 1051 /* 1052 * No reason I can see not to save history on all these events.. 1053 * Most usual occurrence is in a window system, where we're not a login 1054 * shell, but might as well be... (sg) 1055 * But there might be races when lots of shells exit together... 1056 * [this is also incompatible]. 1057 * We have to be mre careful here. If the parent wants to 1058 * ignore the signals then we leave them untouched... 1059 * We also only setup the handlers for shells that are trully 1060 * interactive. 1061 */ 1062 sigaction(SIGHUP, NULL, &osig); 1063 if (loginsh || osig.sa_handler != SIG_IGN) 1064 /* exit processing on HUP */ 1065 sigset_interrupting(SIGHUP, queue_phup); 1066 #ifdef SIGXCPU 1067 sigaction(SIGXCPU, NULL, &osig); 1068 if (loginsh || osig.sa_handler != SIG_IGN) 1069 /* exit processing on XCPU */ 1070 sigset_interrupting(SIGXCPU, queue_phup); 1071 #endif 1072 #ifdef SIGXFSZ 1073 sigaction(SIGXFSZ, NULL, &osig); 1074 if (loginsh || osig.sa_handler != SIG_IGN) 1075 /* exit processing on XFSZ */ 1076 sigset_interrupting(SIGXFSZ, queue_phup); 1077 #endif 1078 1079 if (quitit == 0 && arginp == 0) { 1080 #ifdef SIGTSTP 1081 (void) signal(SIGTSTP, SIG_IGN); 1082 #endif 1083 #ifdef SIGTTIN 1084 (void) signal(SIGTTIN, SIG_IGN); 1085 #endif 1086 #ifdef SIGTTOU 1087 (void) signal(SIGTTOU, SIG_IGN); 1088 #endif 1089 /* 1090 * Wait till in foreground, in case someone stupidly runs csh & 1091 * dont want to try to grab away the tty. 1092 */ 1093 if (isatty(FSHDIAG)) 1094 f = FSHDIAG; 1095 else if (isatty(FSHOUT)) 1096 f = FSHOUT; 1097 else if (isatty(OLDSTD)) 1098 f = OLDSTD; 1099 else 1100 f = -1; 1101 1102 #ifdef NeXT 1103 /* NeXT 2.0 /usr/etc/rlogind, does not set our process group! */ 1104 if (shpgrp == 0) { 1105 shpgrp = getpid(); 1106 (void) setpgid(0, shpgrp); 1107 (void) tcsetpgrp(f, shpgrp); 1108 } 1109 #endif /* NeXT */ 1110 #ifdef BSDJOBS /* if we have tty job control */ 1111 if (grabpgrp(f, shpgrp) != -1) { 1112 /* 1113 * Thanks to Matt Day for the POSIX references, and to 1114 * Paul Close for the SGI clarification. 1115 */ 1116 if (setdisc(f) != -1) { 1117 opgrp = shpgrp; 1118 shpgrp = getpid(); 1119 tpgrp = shpgrp; 1120 if (tcsetpgrp(f, shpgrp) == -1) { 1121 /* 1122 * On hpux 7.03 this fails with EPERM. This happens on 1123 * the 800 when opgrp != shpgrp at this point. (we were 1124 * forked from a non job control shell) 1125 * POSIX 7.2.4, says we failed because the process 1126 * group specified did not belong to a process 1127 * in the same session with the tty. So we set our 1128 * process group and try again. 1129 */ 1130 if (setpgid(0, shpgrp) == -1) { 1131 xprintf("setpgid:"); 1132 goto notty; 1133 } 1134 if (tcsetpgrp(f, shpgrp) == -1) { 1135 xprintf("tcsetpgrp:"); 1136 goto notty; 1137 } 1138 } 1139 /* 1140 * We check the process group now. If it is the same, then 1141 * we don't need to set it again. On hpux 7.0 on the 300's 1142 * if we set it again it fails with EPERM. This is the 1143 * correct behavior according to POSIX 4.3.3 if the process 1144 * was a session leader . 1145 */ 1146 else if (shpgrp != mygetpgrp()) { 1147 if(setpgid(0, shpgrp) == -1) { 1148 xprintf("setpgid:"); 1149 goto notty; 1150 } 1151 } 1152 #ifdef IRIS4D 1153 /* 1154 * But on irix 3.3 we need to set it again, even if it is 1155 * the same. We do that to tell the system that we 1156 * need BSD process group compatibility. 1157 */ 1158 else 1159 (void) setpgid(0, shpgrp); 1160 #endif 1161 (void) close_on_exec(dcopy(f, FSHTTY), 1); 1162 } 1163 else 1164 tpgrp = -1; 1165 } 1166 if (tpgrp == -1) { 1167 notty: 1168 xprintf(CGETS(11, 1, "Warning: no access to tty (%s).\n"), 1169 strerror(errno)); 1170 xprintf("%s", 1171 CGETS(11, 2, "Thus no job control in this shell.\n")); 1172 /* 1173 * Fix from:Sakari Jalovaara <sja@sirius.hut.fi> if we don't 1174 * have access to tty, disable editing too 1175 */ 1176 if (adrof(STRedit)) 1177 unsetv(STRedit); 1178 editing = 0; 1179 } 1180 #else /* BSDJOBS */ /* don't have job control, so frotz it */ 1181 tpgrp = -1; 1182 #endif /* BSDJOBS */ 1183 } 1184 } 1185 if (setintr == 0 && parintr.sa_handler == SIG_DFL) 1186 setintr = 1; 1187 1188 /* 1189 * SVR4 doesn't send a SIGCHLD when a child is stopped or continued if the 1190 * handler is installed with signal(2) or sigset(2). sigaction(2) must 1191 * be used instead. 1192 * 1193 * David Dawes (dawes@physics.su.oz.au) Sept 1991 1194 */ 1195 sigset_interrupting(SIGCHLD, queue_pchild); 1196 1197 if (intty && !arginp) 1198 (void) ed_Setup(editing);/* Get the tty state, and set defaults */ 1199 /* Only alter the tty state if editing */ 1200 1201 /* 1202 * Set an exit here in case of an interrupt or error reading the shell 1203 * start-up scripts. 1204 */ 1205 osetintr = setintr; 1206 oparintr = parintr; 1207 (void)cleanup_push_mark(); /* There is no outer handler */ 1208 if (setexit() != 0) /* PWP */ 1209 reenter = 1; 1210 else 1211 reenter = 0; 1212 exitset++; 1213 haderr = 0; /* In case second time through */ 1214 if (!fast && reenter == 0) { 1215 /* Will have varval(STRhome) here because set fast if don't */ 1216 { 1217 pintr_disabled++; 1218 cleanup_push(&pintr_disabled, disabled_cleanup); 1219 setintr = 0;/*FIXRESET:cleanup*/ 1220 /* onintr in /etc/ files has no effect */ 1221 parintr.sa_handler = SIG_IGN;/*FIXRESET: cleanup*/ 1222 #ifdef LOGINFIRST 1223 #ifdef _PATH_DOTLOGIN 1224 if (loginsh) 1225 (void) srcfile(_PATH_DOTLOGIN, 0, 0, NULL); 1226 #endif 1227 #endif 1228 1229 #ifdef _PATH_DOTCSHRC 1230 (void) srcfile(_PATH_DOTCSHRC, 0, 0, NULL); 1231 #endif 1232 if (!arginp && !onelflg && !havhash) 1233 dohash(NULL,NULL); 1234 #ifndef LOGINFIRST 1235 #ifdef _PATH_DOTLOGIN 1236 if (loginsh) 1237 (void) srcfile(_PATH_DOTLOGIN, 0, 0, NULL); 1238 #endif 1239 #endif 1240 cleanup_until(&pintr_disabled); 1241 setintr = osetintr; 1242 parintr = oparintr; 1243 } 1244 #ifdef LOGINFIRST 1245 if (loginsh) 1246 (void) srccat(varval(STRhome), STRsldotlogin); 1247 #endif 1248 /* upward compat. */ 1249 if (!srccat(varval(STRhome), STRsldottcshrc)) 1250 (void) srccat(varval(STRhome), STRsldotcshrc); 1251 1252 if (!arginp && !onelflg && !havhash) 1253 dohash(NULL,NULL); 1254 1255 /* 1256 * Source history before .login so that it is available in .login 1257 */ 1258 loadhist(NULL, 0); 1259 #ifndef LOGINFIRST 1260 if (loginsh) 1261 (void) srccat(varval(STRhome), STRsldotlogin); 1262 #endif 1263 if (loginsh || rdirs) 1264 loaddirs(NULL); 1265 } 1266 /* Reset interrupt flag */ 1267 setintr = osetintr; 1268 parintr = oparintr; 1269 exitset--; 1270 1271 /* Initing AFTER .cshrc is the Right Way */ 1272 if (intty && !arginp) { /* PWP setup stuff */ 1273 ed_Init(); /* init the new line editor */ 1274 #ifdef SIG_WINDOW 1275 check_window_size(1); /* mung environment */ 1276 #endif /* SIG_WINDOW */ 1277 } 1278 1279 /* 1280 * Now are ready for the -v and -x flags 1281 */ 1282 if (nverbose) 1283 setNS(STRverbose); 1284 if (nexececho) 1285 setNS(STRecho); 1286 1287 /* 1288 * All the rest of the world is inside this call. The argument to process 1289 * indicates whether it should catch "error unwinds". Thus if we are a 1290 * interactive shell our call here will never return by being blown past on 1291 * an error. 1292 */ 1293 process(setintr); 1294 1295 /* 1296 * Mop-up. 1297 */ 1298 if (intty) { 1299 if (loginsh) { 1300 xprintf("logout\n"); 1301 xclose(SHIN); 1302 child = 1; 1303 #ifdef TESLA 1304 do_logout = 1; 1305 #endif /* TESLA */ 1306 goodbye(NULL, NULL); 1307 } 1308 else { 1309 xprintf("exit\n"); 1310 } 1311 } 1312 record(); 1313 exitstat(); 1314 return (0); 1315 } 1316 1317 void 1318 untty(void) 1319 { 1320 #ifdef BSDJOBS 1321 if (tpgrp > 0 && opgrp != shpgrp) { 1322 (void) setpgid(0, opgrp); 1323 (void) tcsetpgrp(FSHTTY, opgrp); 1324 (void) resetdisc(FSHTTY); 1325 } 1326 #endif /* BSDJOBS */ 1327 } 1328 1329 void 1330 importpath(Char *cp) 1331 { 1332 size_t i = 0; 1333 Char *dp; 1334 Char **pv; 1335 int c; 1336 1337 for (dp = cp; *dp; dp++) 1338 if (*dp == PATHSEP) 1339 i++; 1340 /* 1341 * i+2 where i is the number of colons in the path. There are i+1 1342 * directories in the path plus we need room for a zero terminator. 1343 */ 1344 pv = xcalloc(i + 2, sizeof(Char *)); 1345 dp = cp; 1346 i = 0; 1347 if (*dp) 1348 for (;;) { 1349 if ((c = *dp) == PATHSEP || c == 0) { 1350 *dp = 0; 1351 pv[i++] = Strsave(*cp ? cp : STRdot); 1352 if (c) { 1353 cp = dp + 1; 1354 *dp = PATHSEP; 1355 } 1356 else 1357 break; 1358 } 1359 #ifdef WINNT_NATIVE 1360 else if (*dp == '\\') 1361 *dp = '/'; 1362 #endif /* WINNT_NATIVE */ 1363 dp++; 1364 } 1365 pv[i] = 0; 1366 cleanup_push(pv, blk_cleanup); 1367 setq(STRpath, pv, &shvhed, VAR_READWRITE); 1368 cleanup_ignore(pv); 1369 cleanup_until(pv); 1370 } 1371 1372 /* 1373 * Source to the file which is the catenation of the argument names. 1374 */ 1375 static int 1376 srccat(Char *cp, Char *dp) 1377 { 1378 if (cp[0] == '/' && cp[1] == '\0') 1379 return srcfile(short2str(dp), (mflag ? 0 : 1), 0, NULL); 1380 else { 1381 Char *ep; 1382 char *ptr; 1383 int rv; 1384 1385 #ifdef WINNT_NATIVE 1386 ep = Strend(cp); 1387 if (ep != cp && ep[-1] == '/' && dp[0] == '/') /* silly win95 */ 1388 dp++; 1389 #endif /* WINNT_NATIVE */ 1390 1391 ep = Strspl(cp, dp); 1392 cleanup_push(ep, xfree); 1393 ptr = short2str(ep); 1394 1395 rv = srcfile(ptr, (mflag ? 0 : 1), 0, NULL); 1396 cleanup_until(ep); 1397 return rv; 1398 } 1399 } 1400 1401 /* 1402 * Source to a file putting the file descriptor in a safe place (> 2). 1403 */ 1404 #ifndef WINNT_NATIVE 1405 static int 1406 #else 1407 int 1408 #endif /*WINNT_NATIVE*/ 1409 srcfile(const char *f, int onlyown, int flag, Char **av) 1410 { 1411 int unit; 1412 1413 if ((unit = xopen(f, O_RDONLY|O_LARGEFILE)) == -1) 1414 return 0; 1415 cleanup_push(&unit, open_cleanup); 1416 unit = dmove(unit, -1); 1417 cleanup_ignore(&unit); 1418 cleanup_until(&unit); 1419 1420 (void) close_on_exec(unit, 1); 1421 srcunit(unit, onlyown, flag, av); 1422 return 1; 1423 } 1424 1425 1426 /* 1427 * Save the shell state, and establish new argument vector, and new input 1428 * fd. 1429 */ 1430 static void 1431 st_save(struct saved_state *st, int unit, int hflg, Char **al, Char **av) 1432 { 1433 st->insource = insource; 1434 st->SHIN = SHIN; 1435 /* Want to preserve the meaning of "source file >output". 1436 * Save old descriptors, move new 0,1,2 to safe places and assign 1437 * them to SH* and let process() redo 0,1,2 from them. 1438 * 1439 * The macro returns true if d1 and d2 are good and they point to 1440 * different things. If you don't avoid saving duplicate 1441 * descriptors, you really limit the depth of "source" recursion 1442 * you can do because of all the open file descriptors. -IAN! 1443 */ 1444 #define NEED_SAVE_FD(d1,d2) \ 1445 (fstat(d1, &s1) != -1 && fstat(d2, &s2) != -1 \ 1446 && (s1.st_ino != s2.st_ino || s1.st_dev != s2.st_dev) ) 1447 1448 st->OLDSTD = st->SHOUT = st->SHDIAG = -1;/* test later to restore these */ 1449 if (didfds) { 1450 struct stat s1, s2; 1451 if (NEED_SAVE_FD(0,OLDSTD)) { 1452 st->OLDSTD = OLDSTD; 1453 OLDSTD = dmove(0, -1); 1454 (void)close_on_exec(OLDSTD, 1); 1455 } 1456 if (NEED_SAVE_FD(1,SHOUT)) { 1457 st->SHOUT = SHOUT; 1458 SHOUT = dmove(1, -1); 1459 (void)close_on_exec(SHOUT, 1); 1460 } 1461 if (NEED_SAVE_FD(2,SHDIAG)) { 1462 st->SHDIAG = SHDIAG; 1463 SHDIAG = dmove(2, -1); 1464 (void)close_on_exec(SHDIAG, 1); 1465 } 1466 donefds(); 1467 } 1468 1469 st->intty = intty; 1470 st->whyles = whyles; 1471 st->gointr = gointr; 1472 st->arginp = arginp; 1473 st->evalp = evalp; 1474 st->evalvec = evalvec; 1475 st->alvecp = alvecp; 1476 st->alvec = alvec; 1477 st->onelflg = onelflg; 1478 st->enterhist = enterhist; 1479 st->justpr = justpr; 1480 if (hflg) 1481 st->HIST = HIST; 1482 else 1483 st->HIST = '\0'; 1484 st->cantell = cantell; 1485 cpybin(st->B, B); 1486 1487 /* 1488 * we can now pass arguments to source. 1489 * For compatibility we do that only if arguments were really 1490 * passed, otherwise we keep the old, global $argv like before. 1491 */ 1492 if (av != NULL && *av != NULL) { 1493 struct varent *vp; 1494 if ((vp = adrof(STRargv)) != NULL && vp->vec != NULL) 1495 st->argv = saveblk(vp->vec); 1496 else 1497 st->argv = NULL; 1498 setq(STRargv, saveblk(av), &shvhed, VAR_READWRITE); 1499 } 1500 else 1501 st->argv = NULL; 1502 st->av = av; 1503 1504 SHIN = unit; /* Do this first */ 1505 1506 /* Establish new input arena */ 1507 { 1508 fbuf = NULL; 1509 fseekp = feobp = fblocks = 0; 1510 settell(); 1511 } 1512 1513 arginp = 0; 1514 onelflg = 0; 1515 intty = isatty(SHIN); 1516 whyles = 0; 1517 gointr = 0; 1518 evalvec = 0; 1519 evalp = 0; 1520 alvec = al; 1521 alvecp = 0; 1522 enterhist = hflg; 1523 if (enterhist) 1524 HIST = '\0'; 1525 insource = 1; 1526 } 1527 1528 1529 /* 1530 * Restore the shell to a saved state 1531 */ 1532 static void 1533 st_restore(void *xst) 1534 { 1535 struct saved_state *st; 1536 1537 st = xst; 1538 if (st->SHIN == -1) 1539 return; 1540 1541 /* Reset input arena */ 1542 { 1543 int i; 1544 Char** nfbuf = fbuf; 1545 int nfblocks = fblocks; 1546 1547 fblocks = 0; 1548 fbuf = NULL; 1549 for (i = 0; i < nfblocks; i++) 1550 xfree(nfbuf[i]); 1551 xfree(nfbuf); 1552 } 1553 cpybin(B, st->B); 1554 1555 xclose(SHIN); 1556 1557 insource = st->insource; 1558 SHIN = st->SHIN; 1559 if (st->OLDSTD != -1) 1560 xclose(OLDSTD), OLDSTD = st->OLDSTD; 1561 if (st->SHOUT != -1) 1562 xclose(SHOUT), SHOUT = st->SHOUT; 1563 if (st->SHDIAG != -1) 1564 xclose(SHDIAG), SHDIAG = st->SHDIAG; 1565 arginp = st->arginp; 1566 onelflg = st->onelflg; 1567 evalp = st->evalp; 1568 evalvec = st->evalvec; 1569 alvecp = st->alvecp; 1570 alvec = st->alvec; 1571 intty = st->intty; 1572 whyles = st->whyles; 1573 gointr = st->gointr; 1574 if (st->HIST != '\0') 1575 HIST = st->HIST; 1576 enterhist = st->enterhist; 1577 cantell = st->cantell; 1578 justpr = st->justpr; 1579 1580 if (st->argv != NULL) 1581 setq(STRargv, st->argv, &shvhed, VAR_READWRITE); 1582 else if (st->av != NULL && *st->av != NULL && adrof(STRargv) != NULL) 1583 unsetv(STRargv); 1584 } 1585 1586 /* 1587 * Source to a unit. If onlyown it must be our file or our group or 1588 * we don't chance it. This occurs on ".cshrc"s and the like. 1589 */ 1590 static void 1591 srcunit(int unit, int onlyown, int hflg, Char **av) 1592 { 1593 struct saved_state st; 1594 1595 st.SHIN = -1; /* st_restore checks this */ 1596 1597 if (unit < 0) 1598 return; 1599 1600 if (onlyown) { 1601 struct stat stb; 1602 1603 if (fstat(unit, &stb) < 0) { 1604 xclose(unit); 1605 return; 1606 } 1607 } 1608 1609 /* Does nothing before st_save() because st.SHIN == -1 */ 1610 cleanup_push(&st, st_restore); 1611 if (setintr) { 1612 pintr_disabled++; 1613 cleanup_push(&pintr_disabled, disabled_cleanup); 1614 } 1615 1616 /* Save the current state and move us to a new state */ 1617 st_save(&st, unit, hflg, NULL, av); 1618 1619 /* 1620 * Now if we are allowing commands to be interrupted, we let ourselves be 1621 * interrupted. 1622 */ 1623 if (setintr) { 1624 cleanup_until(&pintr_disabled); 1625 pintr_disabled++; 1626 cleanup_push(&pintr_disabled, disabled_cleanup); 1627 } 1628 1629 process(0); /* 0 -> blow away on errors */ 1630 1631 /* Restore the old state */ 1632 cleanup_until(&st); 1633 } 1634 1635 1636 /*ARGSUSED*/ 1637 void 1638 goodbye(Char **v, struct command *c) 1639 { 1640 USE(v); 1641 USE(c); 1642 record(); 1643 1644 if (loginsh) { 1645 size_t omark; 1646 sigset_t set; 1647 1648 sigemptyset(&set); 1649 signal(SIGQUIT, SIG_IGN); 1650 sigaddset(&set, SIGQUIT); 1651 sigprocmask(SIG_UNBLOCK, &set, NULL); 1652 signal(SIGINT, SIG_IGN); 1653 sigaddset(&set, SIGINT); 1654 signal(SIGTERM, SIG_IGN); 1655 sigaddset(&set, SIGTERM); 1656 signal(SIGHUP, SIG_IGN); 1657 sigaddset(&set, SIGHUP); 1658 sigprocmask(SIG_UNBLOCK, &set, NULL); 1659 phup_disabled = 1; 1660 setintr = 0; /* No interrupts after "logout" */ 1661 /* Trap errors inside .logout */ 1662 omark = cleanup_push_mark(); 1663 if (setexit() == 0) { 1664 if (!(adrof(STRlogout))) 1665 setcopy(STRlogout, STRnormal, VAR_READWRITE); 1666 #ifdef _PATH_DOTLOGOUT 1667 (void) srcfile(_PATH_DOTLOGOUT, 0, 0, NULL); 1668 #endif 1669 if (adrof(STRhome)) 1670 (void) srccat(varval(STRhome), STRsldtlogout); 1671 #ifdef TESLA 1672 do_logout = 1; 1673 #endif /* TESLA */ 1674 } 1675 cleanup_pop_mark(omark); 1676 } 1677 exitstat(); 1678 } 1679 1680 void 1681 exitstat(void) 1682 { 1683 #ifdef PROF 1684 monitor(0); 1685 #endif 1686 /* 1687 * Note that if STATUS is corrupted (i.e. getn bombs) then error will exit 1688 * directly because we poke child here. Otherwise we might continue 1689 * unwarrantedly (sic). 1690 */ 1691 child = 1; 1692 1693 xexit(getn(varval(STRstatus))); 1694 } 1695 1696 /* 1697 * in the event of a HUP we want to save the history 1698 */ 1699 void 1700 phup(void) 1701 { 1702 if (loginsh) { 1703 setcopy(STRlogout, STRhangup, VAR_READWRITE); 1704 #ifdef _PATH_DOTLOGOUT 1705 (void) srcfile(_PATH_DOTLOGOUT, 0, 0, NULL); 1706 #endif 1707 if (adrof(STRhome)) 1708 (void) srccat(varval(STRhome), STRsldtlogout); 1709 } 1710 1711 record(); 1712 1713 #ifdef POSIXJOBS 1714 /* 1715 * We kill the last foreground process group. It then becomes 1716 * responsible to propagate the SIGHUP to its progeny. 1717 */ 1718 { 1719 struct process *pp, *np; 1720 1721 for (pp = proclist.p_next; pp; pp = pp->p_next) { 1722 np = pp; 1723 /* 1724 * Find if this job is in the foreground. It could be that 1725 * the process leader has exited and the foreground flag 1726 * is cleared for it. 1727 */ 1728 do 1729 /* 1730 * If a process is in the foreground we try to kill 1731 * it's process group. If we succeed, then the 1732 * whole job is gone. Otherwise we keep going... 1733 * But avoid sending HUP to the shell again. 1734 */ 1735 if (((np->p_flags & PFOREGND) != 0) && np->p_jobid != shpgrp) { 1736 np->p_flags &= ~PHUP; 1737 if (killpg(np->p_jobid, SIGHUP) != -1) { 1738 /* In case the job was suspended... */ 1739 #ifdef SIGCONT 1740 (void) killpg(np->p_jobid, SIGCONT); 1741 #endif 1742 break; 1743 } 1744 } 1745 while ((np = np->p_friends) != pp); 1746 } 1747 } 1748 #endif /* POSIXJOBS */ 1749 1750 xexit(SIGHUP); 1751 } 1752 1753 static Char *jobargv[2] = {STRjobs, 0}; 1754 1755 /* 1756 * Catch an interrupt, e.g. during lexical input. 1757 * If we are an interactive shell, we reset the interrupt catch 1758 * immediately. In any case we drain the shell output, 1759 * and finally go through the normal error mechanism, which 1760 * gets a chance to make the shell go away. 1761 */ 1762 int just_signaled; /* bugfix by Michael Bloom (mg@ttidca.TTI.COM) */ 1763 1764 void 1765 pintr(void) 1766 { 1767 just_signaled = 1; 1768 pintr1(1); 1769 } 1770 1771 void 1772 pintr1(int wantnl) 1773 { 1774 if (setintr) { 1775 if (pjobs) { 1776 pjobs = 0; 1777 xputchar('\n'); 1778 dojobs(jobargv, NULL); 1779 stderror(ERR_NAME | ERR_INTR); 1780 } 1781 } 1782 /* MH - handle interrupted completions specially */ 1783 { 1784 if (InsideCompletion) 1785 stderror(ERR_SILENT); 1786 } 1787 /* JV - Make sure we shut off inputl */ 1788 { 1789 (void) Cookedmode(); 1790 GettingInput = 0; 1791 } 1792 drainoline(); 1793 #ifdef HAVE_GETPWENT 1794 (void) endpwent(); 1795 #endif 1796 1797 /* 1798 * If we have an active "onintr" then we search for the label. Note that if 1799 * one does "onintr -" then we shan't be interruptible so we needn't worry 1800 * about that here. 1801 */ 1802 if (gointr) { 1803 gotolab(gointr); 1804 reset(); 1805 } 1806 else if (intty && wantnl) { 1807 if (editing) { 1808 /* 1809 * If we are editing a multi-line input command, and move to 1810 * the beginning of the line, we don't want to trash it when 1811 * we hit ^C 1812 */ 1813 PastBottom(); 1814 ClearLines(); 1815 ClearDisp(); 1816 } 1817 else { 1818 /* xputchar('\n'); *//* Some like this, others don't */ 1819 (void) putraw('\r'); 1820 (void) putraw('\n'); 1821 } 1822 } 1823 stderror(ERR_SILENT); 1824 } 1825 1826 /* 1827 * Process is the main driving routine for the shell. 1828 * It runs all command processing, except for those within { ... } 1829 * in expressions (which is run by a routine evalav in sh.exp.c which 1830 * is a stripped down process), and `...` evaluation which is run 1831 * also by a subset of this code in sh.glob.c in the routine backeval. 1832 * 1833 * The code here is a little strange because part of it is interruptible 1834 * and hence freeing of structures appears to occur when none is necessary 1835 * if this is ignored. 1836 * 1837 * Note that if catch is not set then we will unwind on any error. 1838 * If an end-of-file occurs, we return. 1839 */ 1840 void 1841 process(int catch) 1842 { 1843 jmp_buf_t osetexit; 1844 /* PWP: This might get nuked my longjmp so don't make it a register var */ 1845 size_t omark; 1846 volatile int didexitset = 0; 1847 1848 getexit(osetexit); 1849 omark = cleanup_push_mark(); 1850 for (;;) { 1851 struct command *t; 1852 int hadhist, old_pintr_disabled; 1853 1854 (void)setexit(); 1855 if (didexitset == 0) { 1856 exitset++; 1857 didexitset++; 1858 } 1859 pendjob(); 1860 1861 justpr = enterhist; /* execute if not entering history */ 1862 1863 if (haderr) { 1864 if (!catch) { 1865 /* unwind */ 1866 doneinp = 0; 1867 cleanup_pop_mark(omark); 1868 resexit(osetexit); 1869 reset(); 1870 } 1871 haderr = 0; 1872 /* 1873 * Every error is eventually caught here or the shell dies. It is 1874 * at this point that we clean up any left-over open files, by 1875 * closing all but a fixed number of pre-defined files. Thus 1876 * routines don't have to worry about leaving files open due to 1877 * deeper errors... they will get closed here. 1878 */ 1879 closem(); 1880 continue; 1881 } 1882 if (doneinp) { 1883 doneinp = 0; 1884 break; 1885 } 1886 if (chkstop) 1887 chkstop--; 1888 if (neednote) 1889 pnote(); 1890 if (intty && prompt && evalvec == 0) { 1891 just_signaled = 0; 1892 mailchk(); 1893 /* 1894 * Watch for logins/logouts. Next is scheduled commands stored 1895 * previously using "sched." Then execute periodic commands. 1896 * Following that, the prompt precmd is run. 1897 */ 1898 #ifndef HAVENOUTMP 1899 watch_login(0); 1900 #endif /* !HAVENOUTMP */ 1901 sched_run(); 1902 period_cmd(); 1903 precmd(); 1904 /* 1905 * If we are at the end of the input buffer then we are going to 1906 * read fresh stuff. Otherwise, we are rereading input and don't 1907 * need or want to prompt. 1908 */ 1909 if (fseekp == feobp && aret == TCSH_F_SEEK) 1910 printprompt(0, NULL); 1911 flush(); 1912 setalarm(1); 1913 } 1914 if (seterr) { 1915 xfree(seterr); 1916 seterr = NULL; 1917 } 1918 1919 /* 1920 * Interruptible during interactive reads 1921 */ 1922 if (setintr) 1923 pintr_push_enable(&old_pintr_disabled); 1924 hadhist = lex(¶ml); 1925 if (setintr) 1926 cleanup_until(&old_pintr_disabled); 1927 cleanup_push(¶ml, lex_cleanup); 1928 1929 /* 1930 * Echo not only on VERBOSE, but also with history expansion. If there 1931 * is a lexical error then we forego history echo. 1932 */ 1933 if ((hadhist && !seterr && intty && !tellwhat && !Expand && !whyles) || 1934 adrof(STRverbose)) { 1935 int odidfds = didfds; 1936 haderr = 1; 1937 didfds = 0; 1938 prlex(¶ml); 1939 flush(); 1940 haderr = 0; 1941 didfds = odidfds; 1942 } 1943 (void) alarm(0); /* Autologout OFF */ 1944 alrmcatch_disabled = 1; 1945 1946 /* 1947 * Save input text on the history list if reading in old history, or it 1948 * is from the terminal at the top level and not in a loop. 1949 * 1950 * PWP: entry of items in the history list while in a while loop is done 1951 * elsewhere... 1952 */ 1953 if (enterhist || (catch && intty && !whyles && !tellwhat && !arun)) 1954 savehist(¶ml, enterhist > 1); 1955 1956 if (Expand && seterr) 1957 Expand = 0; 1958 1959 /* 1960 * Print lexical error messages, except when sourcing history lists. 1961 */ 1962 if (!enterhist && seterr) 1963 stderror(ERR_OLD); 1964 1965 /* 1966 * If had a history command :p modifier then this is as far as we 1967 * should go 1968 */ 1969 if (justpr) 1970 goto cmd_done; 1971 1972 /* 1973 * If had a tellwhat from twenex() then do 1974 */ 1975 if (tellwhat) { 1976 (void) tellmewhat(¶ml, NULL); 1977 goto cmd_done; 1978 } 1979 1980 alias(¶ml); 1981 1982 #ifdef BSDJOBS 1983 /* 1984 * If we are interactive, try to continue jobs that we have stopped 1985 */ 1986 if (prompt) 1987 continue_jobs(¶ml); 1988 #endif /* BSDJOBS */ 1989 1990 /* 1991 * Check to see if the user typed "rm * .o" or something 1992 */ 1993 if (prompt) 1994 rmstar(¶ml); 1995 /* 1996 * Parse the words of the input into a parse tree. 1997 */ 1998 t = syntax(paraml.next, ¶ml, 0); 1999 cleanup_push(t, syntax_cleanup); 2000 if (seterr) 2001 stderror(ERR_OLD); 2002 2003 postcmd(); 2004 /* 2005 * Execute the parse tree From: Michael Schroeder 2006 * <mlschroe@immd4.informatik.uni-erlangen.de> was execute(t, tpgrp); 2007 */ 2008 execute(t, (tpgrp > 0 ? tpgrp : -1), NULL, NULL, TRUE); 2009 2010 /* 2011 * Made it! 2012 */ 2013 #ifdef SIG_WINDOW 2014 if (windowchg || (catch && intty && !whyles && !tellwhat)) { 2015 (void) check_window_size(0); /* for window systems */ 2016 } 2017 #endif /* SIG_WINDOW */ 2018 setcopy(STR_, InputBuf, VAR_READWRITE | VAR_NOGLOB); 2019 cmd_done: 2020 cleanup_until(¶ml); 2021 } 2022 cleanup_pop_mark(omark); 2023 resexit(osetexit); 2024 exitset--; 2025 } 2026 2027 /*ARGSUSED*/ 2028 void 2029 dosource(Char **t, struct command *c) 2030 { 2031 Char *f; 2032 int hflg = 0; 2033 char *file; 2034 2035 USE(c); 2036 t++; 2037 if (*t && eq(*t, STRmh)) { 2038 if (*++t == NULL) 2039 stderror(ERR_NAME | ERR_HFLAG); 2040 hflg++; 2041 } 2042 else if (*t && eq(*t, STRmm)) { 2043 if (*++t == NULL) 2044 stderror(ERR_NAME | ERR_MFLAG); 2045 hflg = 2; 2046 } 2047 2048 f = globone(*t++, G_ERROR); 2049 file = strsave(short2str(f)); 2050 cleanup_push(file, xfree); 2051 xfree(f); 2052 t = glob_all_or_error(t); 2053 if ((!srcfile(file, 0, hflg, t)) && (!hflg) && (!bequiet)) 2054 stderror(ERR_SYSTEM, file, strerror(errno)); 2055 cleanup_until(file); 2056 } 2057 2058 /* 2059 * Check for mail. 2060 * If we are a login shell, then we don't want to tell 2061 * about any mail file unless its been modified 2062 * after the time we started. 2063 * This prevents us from telling the user things he already 2064 * knows, since the login program insists on saying 2065 * "You have mail." 2066 */ 2067 2068 /* 2069 * The AMS version. 2070 * This version checks if the file is a directory, and if so, 2071 * tells you the number of files in it, otherwise do the old thang. 2072 * The magic "+1" in the time calculation is to compensate for 2073 * an AFS bug where directory mtimes are set to 1 second in 2074 * the future. 2075 */ 2076 2077 static void 2078 mailchk(void) 2079 { 2080 struct varent *v; 2081 Char **vp; 2082 time_t t; 2083 int intvl, cnt; 2084 struct stat stb; 2085 int new; 2086 2087 v = adrof(STRmail); 2088 if (v == NULL || v->vec == NULL) 2089 return; 2090 (void) time(&t); 2091 vp = v->vec; 2092 cnt = blklen(vp); 2093 intvl = (cnt && number(*vp)) ? (--cnt, getn(*vp++)) : MAILINTVL; 2094 if (intvl < 1) 2095 intvl = 1; 2096 if (chktim + intvl > t) 2097 return; 2098 for (; *vp; vp++) { 2099 char *filename = short2str(*vp); 2100 char *mboxdir = filename; 2101 2102 if (stat(filename, &stb) < 0) 2103 continue; 2104 #if defined(BSDTIMES) || defined(_SEQUENT_) 2105 new = stb.st_mtime > time0.tv_sec; 2106 #else 2107 new = stb.st_mtime > seconds0; 2108 #endif 2109 if (S_ISDIR(stb.st_mode)) { 2110 DIR *mailbox; 2111 int mailcount = 0; 2112 char *tempfilename; 2113 struct stat stc; 2114 2115 tempfilename = xasprintf("%s/new", filename); 2116 2117 if (stat(tempfilename, &stc) != -1 && S_ISDIR(stc.st_mode)) { 2118 /* 2119 * "filename/new" exists and is a directory; you are 2120 * using Qmail. 2121 */ 2122 stb = stc; 2123 #if defined(BSDTIMES) || defined(_SEQUENT_) 2124 new = stb.st_mtime > time0.tv_sec; 2125 #else 2126 new = stb.st_mtime > seconds0; 2127 #endif 2128 mboxdir = tempfilename; 2129 } 2130 2131 if (stb.st_mtime <= chktim + 1 || (loginsh && !new)) { 2132 xfree(tempfilename); 2133 continue; 2134 } 2135 2136 mailbox = opendir(mboxdir); 2137 xfree(tempfilename); 2138 if (mailbox == NULL) 2139 continue; 2140 2141 /* skip . and .. */ 2142 if (!readdir(mailbox) || !readdir(mailbox)) 2143 continue; 2144 2145 while (readdir(mailbox)) 2146 mailcount++; 2147 2148 if (mailcount == 0) 2149 continue; 2150 2151 if (cnt == 1) 2152 xprintf(CGETS(11, 3, "You have %d mail messages.\n"), 2153 mailcount); 2154 else 2155 xprintf(CGETS(11, 4, "You have %d mail messages in %s.\n"), 2156 mailcount, filename); 2157 } 2158 else { 2159 char *type; 2160 2161 if (stb.st_size == 0 || stb.st_atime > stb.st_mtime || 2162 (stb.st_atime <= chktim && stb.st_mtime <= chktim) || 2163 (loginsh && !new)) 2164 continue; 2165 type = strsave(new ? CGETS(11, 6, "new ") : ""); 2166 cleanup_push(type, xfree); 2167 if (cnt == 1) 2168 xprintf(CGETS(11, 5, "You have %smail.\n"), type); 2169 else 2170 xprintf(CGETS(11, 7, "You have %smail in %s.\n"), type, filename); 2171 cleanup_until(type); 2172 } 2173 } 2174 chktim = t; 2175 } 2176 2177 /* 2178 * Extract a home directory from the password file 2179 * The argument points to a buffer where the name of the 2180 * user whose home directory is sought is currently. 2181 * We return home directory of the user, or NULL. 2182 */ 2183 Char * 2184 gethdir(const Char *home) 2185 { 2186 Char *h; 2187 2188 /* 2189 * Is it us? 2190 */ 2191 if (*home == '\0') { 2192 if ((h = varval(STRhome)) != STRNULL) 2193 return Strsave(h); 2194 else 2195 return NULL; 2196 } 2197 2198 /* 2199 * Look in the cache 2200 */ 2201 if ((h = gettilde(home)) == NULL) 2202 return NULL; 2203 else 2204 return Strsave(h); 2205 } 2206 2207 /* 2208 * Move the initial descriptors to their eventual 2209 * resting places, closing all other units. 2210 */ 2211 void 2212 initdesc(void) 2213 { 2214 #ifdef NLS_BUGS 2215 #ifdef NLS_CATALOGS 2216 nlsclose(); 2217 #endif /* NLS_CATALOGS */ 2218 #endif /* NLS_BUGS */ 2219 2220 2221 didfds = 0; /* 0, 1, 2 aren't set up */ 2222 (void) close_on_exec(SHIN = dcopy(0, FSHIN), 1); 2223 (void) close_on_exec(SHOUT = dcopy(1, FSHOUT), 1); 2224 (void) close_on_exec(SHDIAG = dcopy(2, FSHDIAG), 1); 2225 (void) close_on_exec(OLDSTD = dcopy(SHIN, FOLDSTD), 1); 2226 #ifndef CLOSE_ON_EXEC 2227 didcch = 0; /* Havent closed for child */ 2228 #endif /* CLOSE_ON_EXEC */ 2229 isdiagatty = isatty(SHDIAG); 2230 isoutatty = isatty(SHOUT); 2231 #ifdef NLS_BUGS 2232 #ifdef NLS_CATALOGS 2233 nlsinit(); 2234 #endif /* NLS_CATALOGS */ 2235 #endif /* NLS_BUGS */ 2236 } 2237 2238 2239 void 2240 #ifdef PROF 2241 done(int i) 2242 #else 2243 xexit(int i) 2244 #endif 2245 { 2246 #ifdef TESLA 2247 if (loginsh && do_logout) { 2248 /* this is to send hangup signal to the develcon */ 2249 /* we toggle DTR. clear dtr - sleep 1 - set dtr */ 2250 /* ioctl will return ENOTTY for pty's but we ignore it */ 2251 /* exitstat will run after disconnect */ 2252 /* we sleep for 2 seconds to let things happen in */ 2253 /* .logout and rechist() */ 2254 #ifdef TIOCCDTR 2255 (void) sleep(2); 2256 (void) ioctl(FSHTTY, TIOCCDTR, NULL); 2257 (void) sleep(1); 2258 (void) ioctl(FSHTTY, TIOCSDTR, NULL); 2259 #endif /* TIOCCDTR */ 2260 } 2261 #endif /* TESLA */ 2262 2263 { 2264 struct process *pp, *np; 2265 2266 /* Kill all processes marked for hup'ing */ 2267 for (pp = proclist.p_next; pp; pp = pp->p_next) { 2268 np = pp; 2269 do 2270 if ((np->p_flags & PHUP) && np->p_jobid != shpgrp) { 2271 if (killpg(np->p_jobid, SIGHUP) != -1) { 2272 /* In case the job was suspended... */ 2273 #ifdef SIGCONT 2274 (void) killpg(np->p_jobid, SIGCONT); 2275 #endif 2276 break; 2277 } 2278 } 2279 while ((np = np->p_friends) != pp); 2280 } 2281 } 2282 untty(); 2283 #ifdef NLS_CATALOGS 2284 /* 2285 * We need to call catclose, because SVR4 leaves symlinks behind otherwise 2286 * in the catalog directories. We cannot close on a vforked() child, 2287 * because messages will stop working on the parent too. 2288 */ 2289 if (child == 0) 2290 nlsclose(); 2291 #endif /* NLS_CATALOGS */ 2292 #ifdef WINNT_NATIVE 2293 nt_cleanup(); 2294 #endif /* WINNT_NATIVE */ 2295 _exit(i); 2296 } 2297 2298 #ifndef _PATH_DEFPATH 2299 static Char ** 2300 defaultpath(void) 2301 { 2302 char *ptr; 2303 Char **blk, **blkp; 2304 struct stat stb; 2305 2306 blkp = blk = xmalloc(sizeof(Char *) * 10); 2307 2308 #ifndef NODOT 2309 # ifndef DOTLAST 2310 *blkp++ = Strsave(STRdot); 2311 # endif 2312 #endif 2313 2314 #define DIRAPPEND(a) \ 2315 if (stat(ptr = a, &stb) == 0 && S_ISDIR(stb.st_mode)) \ 2316 *blkp++ = SAVE(ptr) 2317 2318 #ifdef _PATH_LOCAL 2319 DIRAPPEND(_PATH_LOCAL); 2320 #endif 2321 2322 #ifdef _PATH_USRUCB 2323 DIRAPPEND(_PATH_USRUCB); 2324 #endif 2325 2326 #ifdef _PATH_USRBSD 2327 DIRAPPEND(_PATH_USRBSD); 2328 #endif 2329 2330 #ifdef _PATH_BIN 2331 DIRAPPEND(_PATH_BIN); 2332 #endif 2333 2334 #ifdef _PATH_USRBIN 2335 DIRAPPEND(_PATH_USRBIN); 2336 #endif 2337 2338 #undef DIRAPPEND 2339 2340 #ifndef NODOT 2341 # ifdef DOTLAST 2342 *blkp++ = Strsave(STRdot); 2343 # endif 2344 #endif 2345 *blkp = NULL; 2346 return (blk); 2347 } 2348 #endif 2349 2350 static void 2351 record(void) 2352 { 2353 if (!fast) { 2354 recdirs(NULL, adrof(STRsavedirs) != NULL); 2355 rechist(NULL, adrof(STRsavehist) != NULL); 2356 } 2357 } 2358 2359 /* 2360 * Grab the tty repeatedly, and give up if we are not in the correct 2361 * tty process group. 2362 */ 2363 int 2364 grabpgrp(int fd, pid_t desired) 2365 { 2366 struct sigaction old; 2367 pid_t pgrp; 2368 size_t i; 2369 2370 for (i = 0; i < 100; i++) { 2371 if ((pgrp = tcgetpgrp(fd)) == -1) 2372 return -1; 2373 if (pgrp == desired) 2374 return 0; 2375 (void)sigaction(SIGTTIN, NULL, &old); 2376 (void)signal(SIGTTIN, SIG_DFL); 2377 (void)kill(0, SIGTTIN); 2378 (void)sigaction(SIGTTIN, &old, NULL); 2379 } 2380 errno = EPERM; 2381 return -1; 2382 } 2383