1 /* $Header: /p/tcsh/cvsroot/tcsh/sh.c,v 3.136 2007/02/22 21:57:37 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 3.136 2007/02/22 21:57:37 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 }; 143 144 static int srccat (Char *, Char *); 145 #ifndef WINNT_NATIVE 146 static int srcfile (const char *, int, int, Char **); 147 #else 148 int srcfile (const char *, int, int, Char **); 149 #endif /*WINNT_NATIVE*/ 150 static void srcunit (int, int, int, Char **); 151 static void mailchk (void); 152 #ifndef _PATH_DEFPATH 153 static Char **defaultpath (void); 154 #endif 155 static void record (void); 156 static void st_save (struct saved_state *, int, int, 157 Char **, Char **); 158 static void st_restore (void *); 159 160 int main (int, char **); 161 162 int 163 main(int argc, char **argv) 164 { 165 int batch = 0; 166 volatile int nexececho = 0; 167 int nofile = 0; 168 volatile int nverbose = 0; 169 volatile int rdirs = 0; 170 int quitit = 0; 171 Char *cp; 172 #ifdef AUTOLOGOUT 173 Char *cp2; 174 #endif 175 char *tcp, *ttyn; 176 int f, reenter; 177 char **tempv; 178 int osetintr; 179 struct sigaction oparintr; 180 181 #ifdef WINNT_NATIVE 182 nt_init(); 183 #endif /* WINNT_NATIVE */ 184 #if defined(NLS_CATALOGS) && defined(LC_MESSAGES) 185 (void) setlocale(LC_MESSAGES, ""); 186 #endif /* NLS_CATALOGS && LC_MESSAGES */ 187 188 #ifdef NLS 189 # ifdef LC_CTYPE 190 (void) setlocale(LC_CTYPE, ""); /* for iscntrl */ 191 # endif /* LC_CTYPE */ 192 #endif /* NLS */ 193 194 nlsinit(); 195 196 #ifdef MALLOC_TRACE 197 mal_setstatsfile(fdopen(dmove(xopen("/tmp/tcsh.trace", 198 O_WRONLY|O_CREAT|O_LARGEFILE, 0666), 25), "w")); 199 mal_trace(1); 200 #endif /* MALLOC_TRACE */ 201 202 #if !(defined(BSDTIMES) || defined(_SEQUENT_)) && defined(POSIX) 203 # ifdef _SC_CLK_TCK 204 clk_tck = (clock_t) sysconf(_SC_CLK_TCK); 205 # else /* ! _SC_CLK_TCK */ 206 # ifdef CLK_TCK 207 clk_tck = CLK_TCK; 208 # else /* !CLK_TCK */ 209 clk_tck = HZ; 210 # endif /* CLK_TCK */ 211 # endif /* _SC_CLK_TCK */ 212 #endif /* !BSDTIMES && POSIX */ 213 214 settimes(); /* Immed. estab. timing base */ 215 #ifdef TESLA 216 do_logout = 0; 217 #endif /* TESLA */ 218 219 /* 220 * Make sure we have 0, 1, 2 open 221 * Otherwise `` jobs will not work... (From knaff@poly.polytechnique.fr) 222 */ 223 { 224 do 225 if ((f = xopen(_PATH_DEVNULL, O_RDONLY|O_LARGEFILE)) == -1 && 226 (f = xopen("/", O_RDONLY|O_LARGEFILE)) == -1) 227 exit(1); 228 while (f < 3); 229 xclose(f); 230 } 231 232 #ifdef O_TEXT 233 setmode(0, O_TEXT); 234 #endif 235 236 osinit(); /* Os dependent initialization */ 237 238 239 { 240 char *t; 241 242 t = strrchr(argv[0], '/'); 243 #ifdef WINNT_NATIVE 244 { 245 char *s = strrchr(argv[0], '\\'); 246 if (s) 247 t = s; 248 } 249 #endif /* WINNT_NATIVE */ 250 t = t ? t + 1 : argv[0]; 251 if (*t == '-') t++; 252 progname = strsave((t && *t) ? t : tcshstr); /* never want a null */ 253 tcsh = strcmp(progname, tcshstr) == 0; 254 } 255 256 /* 257 * Initialize non constant strings 258 */ 259 #ifdef _PATH_BSHELL 260 STR_BSHELL = SAVE(_PATH_BSHELL); 261 #endif 262 #ifdef _PATH_TCSHELL 263 STR_SHELLPATH = SAVE(_PATH_TCSHELL); 264 #else 265 # ifdef _PATH_CSHELL 266 STR_SHELLPATH = SAVE(_PATH_CSHELL); 267 # endif 268 #endif 269 STR_environ = blk2short(environ); 270 environ = short2blk(STR_environ); /* So that we can free it */ 271 STR_WORD_CHARS = SAVE(WORD_CHARS); 272 273 HIST = '!'; 274 HISTSUB = '^'; 275 PRCH = '>'; 276 PRCHROOT = '#'; 277 word_chars = STR_WORD_CHARS; 278 bslash_quote = 0; /* PWP: do tcsh-style backslash quoting? */ 279 280 /* Default history size to 100 */ 281 setcopy(STRhistory, str2short("100"), VAR_READWRITE); 282 283 tempv = argv; 284 ffile = SAVE(tempv[0]); 285 dolzero = 0; 286 if (eq(ffile, STRaout)) /* A.out's are quittable */ 287 quitit = 1; 288 uid = getuid(); 289 gid = getgid(); 290 euid = geteuid(); 291 egid = getegid(); 292 /* 293 * We are a login shell if: 1. we were invoked as -<something> with 294 * optional arguments 2. or we were invoked only with the -l flag 295 */ 296 loginsh = (**tempv == '-') || (argc == 2 && 297 tempv[1][0] == '-' && tempv[1][1] == 'l' && 298 tempv[1][2] == '\0'); 299 #ifdef _VMS_POSIX 300 /* No better way to find if we are a login shell */ 301 if (!loginsh) { 302 loginsh = (argc == 1 && getppid() == 1); 303 **tempv = '-'; /* Avoid giving VMS an acidic stomach */ 304 } 305 #endif /* _VMS_POSIX */ 306 307 if (loginsh && **tempv != '-') { 308 char *argv0; 309 310 /* 311 * Mangle the argv space 312 */ 313 tempv[1][0] = '\0'; 314 tempv[1][1] = '\0'; 315 tempv[1] = NULL; 316 argv0 = strspl("-", *tempv); 317 *tempv = argv0; 318 argc--; 319 } 320 if (loginsh) { 321 (void) time(&chktim); 322 setNS(STRloginsh); 323 } 324 325 AsciiOnly = 1; 326 NoNLSRebind = getenv("NOREBIND") != NULL; 327 #ifdef NLS 328 # ifdef SETLOCALEBUG 329 dont_free = 1; 330 # endif /* SETLOCALEBUG */ 331 (void) setlocale(LC_ALL, ""); 332 # ifdef LC_COLLATE 333 (void) setlocale(LC_COLLATE, ""); 334 # endif 335 # ifdef SETLOCALEBUG 336 dont_free = 0; 337 # endif /* SETLOCALEBUG */ 338 # ifdef STRCOLLBUG 339 fix_strcoll_bug(); 340 # endif /* STRCOLLBUG */ 341 342 { 343 int k; 344 345 for (k = 0200; k <= 0377 && !Isprint(CTL_ESC(k)); k++) 346 continue; 347 AsciiOnly = MB_CUR_MAX == 1 && k > 0377; 348 } 349 #else 350 AsciiOnly = getenv("LANG") == NULL && getenv("LC_CTYPE") == NULL; 351 #endif /* NLS */ 352 if (MapsAreInited && !NLSMapsAreInited) 353 ed_InitNLSMaps(); 354 ResetArrowKeys(); 355 356 /* 357 * Initialize for periodic command intervals. Also, initialize the dummy 358 * tty list for login-watch. 359 */ 360 (void) time(&t_period); 361 #ifndef HAVENOUTMP 362 initwatch(); 363 #endif /* !HAVENOUTMP */ 364 365 #if defined(alliant) 366 /* 367 * From: Jim Pace <jdp@research.att.com> 368 * tcsh does not work properly on the alliants through an rlogin session. 369 * The shell generally hangs. Also, reference to the controlling terminal 370 * does not work ( ie: echo foo > /dev/tty ). 371 * 372 * A security feature was added to rlogind affecting FX/80's Concentrix 373 * from revision 5.5.xx upwards (through 5.7 where this fix was implemented) 374 * This security change also affects the FX/2800 series. 375 * The security change to rlogind requires the process group of an rlogin 376 * session become disassociated with the tty in rlogind. 377 * 378 * The changes needed are: 379 * 1. set the process group 380 * 2. reenable the control terminal 381 */ 382 if (loginsh && isatty(SHIN)) { 383 ttyn = ttyname(SHIN); 384 xclose(SHIN); 385 SHIN = xopen(ttyn, O_RDWR|O_LARGEFILE); 386 shpgrp = getpid(); 387 (void) ioctl (SHIN, TIOCSPGRP, (ioctl_t) &shpgrp); 388 (void) setpgid(0, shpgrp); 389 } 390 #endif /* alliant */ 391 392 /* 393 * Move the descriptors to safe places. The variable didfds is 0 while we 394 * have only FSH* to work with. When didfds is true, we have 0,1,2 and 395 * prefer to use these. 396 */ 397 initdesc(); 398 399 /* 400 * Get and set the tty now 401 */ 402 if ((ttyn = ttyname(SHIN)) != NULL) { 403 /* 404 * Could use rindex to get rid of other possible path components, but 405 * hpux preserves the subdirectory /pty/ when storing the tty name in 406 * utmp, so we keep it too. 407 */ 408 if (strncmp(ttyn, "/dev/", 5) == 0) 409 setv(STRtty, cp = SAVE(ttyn + 5), VAR_READWRITE); 410 else 411 setv(STRtty, cp = SAVE(ttyn), VAR_READWRITE); 412 } 413 else 414 setv(STRtty, cp = SAVE(""), VAR_READWRITE); 415 /* 416 * Initialize the shell variables. ARGV and PROMPT are initialized later. 417 * STATUS is also munged in several places. CHILD is munged when 418 * forking/waiting 419 */ 420 421 /* 422 * 7-10-87 Paul Placeway autologout should be set ONLY on login shells and 423 * on shells running as root. Out of these, autologout should NOT be set 424 * for any psudo-terminals (this catches most window systems) and not for 425 * any terminal running X windows. 426 * 427 * At Ohio State, we have had problems with a user having his X session 428 * drop out from under him (on a Sun) because the shell in his master 429 * xterm timed out and exited. 430 * 431 * Really, this should be done with a program external to the shell, that 432 * watches for no activity (and NO running programs, such as dump) on a 433 * terminal for a long peroid of time, and then SIGHUPS the shell on that 434 * terminal. 435 * 436 * bugfix by Rich Salz <rsalz@PINEAPPLE.BBN.COM>: For root rsh things 437 * allways first check to see if loginsh or really root, then do things 438 * with ttyname() 439 * 440 * Also by Jean-Francois Lamy <lamy%ai.toronto.edu@RELAY.CS.NET>: check the 441 * value of cp before using it! ("root can rsh too") 442 * 443 * PWP: keep the nested ifs; the order of the tests matters and a good 444 * (smart) C compiler might re-arange things wrong. 445 */ 446 #ifdef AUTOLOGOUT 447 # ifdef convex 448 if (uid == 0) 449 /* root always has a 15 minute autologout */ 450 setcopy(STRautologout, STRrootdefautologout, VAR_READWRITE); 451 else 452 if (loginsh) 453 /* users get autologout set to 0 */ 454 setcopy(STRautologout, STR0, VAR_READWRITE); 455 # else /* convex */ 456 if (loginsh || (uid == 0)) { 457 if (*cp) { 458 /* only for login shells or root and we must have a tty */ 459 if ((cp2 = Strrchr(cp, (Char) '/')) != NULL) { 460 cp = cp2 + 1; 461 } 462 else 463 cp2 = cp; 464 if (!(((Strncmp(cp2, STRtty, 3) == 0) && Isalpha(cp2[3])) || 465 ((Strncmp(cp, STRpts, 3) == 0) && cp[3] == '/'))) { 466 if (getenv("DISPLAY") == NULL) { 467 /* NOT on X window shells */ 468 setcopy(STRautologout, STRdefautologout, VAR_READWRITE); 469 } 470 } 471 } 472 } 473 # endif /* convex */ 474 #endif /* AUTOLOGOUT */ 475 476 sigset_interrupting(SIGALRM, queue_alrmcatch); 477 478 setcopy(STRstatus, STR0, VAR_READWRITE); 479 480 /* 481 * get and set machine specific environment variables 482 */ 483 getmachine(); 484 485 486 /* 487 * Publish the selected echo style 488 */ 489 #if ECHO_STYLE != BSD_ECHO 490 if (tcsh) { 491 # if ECHO_STYLE == NONE_ECHO 492 setcopy(STRecho_style, STRnone, VAR_READWRITE); 493 # endif /* ECHO_STYLE == NONE_ECHO */ 494 # if ECHO_STYLE == SYSV_ECHO 495 setcopy(STRecho_style, STRsysv, VAR_READWRITE); 496 # endif /* ECHO_STYLE == SYSV_ECHO */ 497 # if ECHO_STYLE == BOTH_ECHO 498 setcopy(STRecho_style, STRboth, VAR_READWRITE); 499 # endif /* ECHO_STYLE == BOTH_ECHO */ 500 } else 501 #endif /* ECHO_STYLE != BSD_ECHO */ 502 setcopy(STRecho_style, STRbsd, VAR_READWRITE); 503 504 /* 505 * increment the shell level. 506 */ 507 shlvl(1); 508 509 if ((tcp = getenv("HOME")) != NULL) 510 cp = quote(SAVE(tcp)); 511 else 512 cp = NULL; 513 514 if (cp == NULL) 515 fast = 1; /* No home -> can't read scripts */ 516 else 517 setv(STRhome, cp, VAR_READWRITE); 518 519 dinit(cp); /* dinit thinks that HOME == cwd in a login 520 * shell */ 521 /* 522 * Grab other useful things from the environment. Should we grab 523 * everything?? 524 */ 525 { 526 char *cln, *cus, *cgr; 527 struct passwd *pw; 528 struct group *gr; 529 530 531 #ifdef apollo 532 int oid = getoid(); 533 534 setv(STRoid, Itoa(oid, 0, 0), VAR_READWRITE); 535 #endif /* apollo */ 536 537 setv(STRuid, Itoa(uid, 0, 0), VAR_READWRITE); 538 539 setv(STRgid, Itoa(gid, 0, 0), VAR_READWRITE); 540 541 cln = getenv("LOGNAME"); 542 cus = getenv("USER"); 543 if (cus != NULL) 544 setv(STRuser, quote(SAVE(cus)), VAR_READWRITE); 545 else if (cln != NULL) 546 setv(STRuser, quote(SAVE(cln)), VAR_READWRITE); 547 else if ((pw = xgetpwuid(uid)) == NULL) 548 setcopy(STRuser, str2short("unknown"), VAR_READWRITE); 549 else 550 setcopy(STRuser, str2short(pw->pw_name), VAR_READWRITE); 551 if (cln == NULL) 552 tsetenv(STRLOGNAME, varval(STRuser)); 553 if (cus == NULL) 554 tsetenv(STRKUSER, varval(STRuser)); 555 556 cgr = getenv("GROUP"); 557 if (cgr != NULL) 558 setv(STRgroup, quote(SAVE(cgr)), VAR_READWRITE); 559 else if ((gr = xgetgrgid(gid)) == NULL) 560 setcopy(STRgroup, str2short("unknown"), VAR_READWRITE); 561 else 562 setcopy(STRgroup, str2short(gr->gr_name), VAR_READWRITE); 563 if (cgr == NULL) 564 tsetenv(STRKGROUP, varval(STRgroup)); 565 } 566 567 /* 568 * HOST may be wrong, since rexd transports the entire environment on sun 569 * 3.x Just set it again 570 */ 571 { 572 char cbuff[MAXHOSTNAMELEN]; 573 574 if (gethostname(cbuff, sizeof(cbuff)) >= 0) { 575 cbuff[sizeof(cbuff) - 1] = '\0'; /* just in case */ 576 tsetenv(STRHOST, str2short(cbuff)); 577 } 578 else 579 tsetenv(STRHOST, str2short("unknown")); 580 } 581 582 583 #ifdef REMOTEHOST 584 /* 585 * Try to determine the remote host we were logged in from. 586 */ 587 remotehost(); 588 #endif /* REMOTEHOST */ 589 590 #ifdef apollo 591 if ((tcp = getenv("SYSTYPE")) == NULL) 592 tcp = "bsd4.3"; 593 tsetenv(STRSYSTYPE, quote(str2short(tcp))); 594 #endif /* apollo */ 595 596 /* 597 * set editing on by default, unless running under Emacs as an inferior 598 * shell. 599 * We try to do this intelligently. If $TERM is available, then it 600 * should determine if we should edit or not. $TERM is preserved 601 * across rlogin sessions, so we will not get confused if we rlogin 602 * under an emacs shell. Another advantage is that if we run an 603 * xterm under an emacs shell, then the $TERM will be set to 604 * xterm, so we are going to want to edit. Unfortunately emacs 605 * does not restore all the tty modes, so xterm is not very well 606 * set up. But this is not the shell's fault. 607 * Also don't edit if $TERM == wm, for when we're running under an ATK app. 608 * Finally, emacs compiled under terminfo, sets the terminal to dumb, 609 * so disable editing for that too. 610 * 611 * Unfortunately, in some cases the initial $TERM setting is "unknown", 612 * "dumb", or "network" which is then changed in the user's startup files. 613 * We fix this by setting noediting here if $TERM is unknown/dumb and 614 * if noediting is set, we switch on editing if $TERM is changed. 615 */ 616 if ((tcp = getenv("TERM")) != NULL) { 617 setv(STRterm, quote(SAVE(tcp)), VAR_READWRITE); 618 noediting = strcmp(tcp, "unknown") == 0 || strcmp(tcp, "dumb") == 0 || 619 strcmp(tcp, "network") == 0; 620 editing = strcmp(tcp, "emacs") != 0 && strcmp(tcp, "wm") != 0 && 621 !noediting; 622 } 623 else { 624 noediting = 0; 625 editing = ((tcp = getenv("EMACS")) == NULL || strcmp(tcp, "t") != 0); 626 } 627 628 /* 629 * The 'edit' variable is either set or unset. It doesn't 630 * need a value. Making it 'emacs' might be confusing. 631 */ 632 if (editing) 633 setNS(STRedit); 634 635 636 /* 637 * still more mutability: make the complete routine automatically add the 638 * suffix of file names... 639 */ 640 setNS(STRaddsuffix); 641 642 /* 643 * Compatibility with tcsh >= 6.12 by default 644 */ 645 setNS(STRcsubstnonl); 646 647 /* 648 * Random default kill ring size 649 */ 650 setcopy(STRkillring, str2short("30"), VAR_READWRITE); 651 652 /* 653 * Re-initialize path if set in environment 654 */ 655 if ((tcp = getenv("PATH")) == NULL) 656 #ifdef _PATH_DEFPATH 657 importpath(str2short(_PATH_DEFPATH)); 658 #else /* !_PATH_DEFPATH */ 659 setq(STRpath, defaultpath(), &shvhed, VAR_READWRITE); 660 #endif /* _PATH_DEFPATH */ 661 else 662 /* Importpath() allocates memory for the path, and the 663 * returned pointer from SAVE() was discarded, so 664 * this was a memory leak.. (sg) 665 * 666 * importpath(SAVE(tcp)); 667 */ 668 importpath(str2short(tcp)); 669 670 671 { 672 /* If the SHELL environment variable ends with "tcsh", set 673 * STRshell to the same path. This is to facilitate using 674 * the executable in environments where the compiled-in 675 * default isn't appropriate (sg). 676 */ 677 678 size_t sh_len = 0; 679 680 if ((tcp = getenv("SHELL")) != NULL) { 681 sh_len = strlen(tcp); 682 if ((sh_len >= 5 && strcmp(tcp + (sh_len - 5), "/tcsh") == 0) || 683 (!tcsh && sh_len >= 4 && strcmp(tcp + (sh_len - 4), "/csh") == 0)) 684 setv(STRshell, quote(SAVE(tcp)), VAR_READWRITE); 685 else 686 sh_len = 0; 687 } 688 if (sh_len == 0) 689 setcopy(STRshell, STR_SHELLPATH, VAR_READWRITE); 690 } 691 692 #ifdef _OSD_POSIX /* BS2000 needs this variable set to "SHELL" */ 693 if ((tcp = getenv("PROGRAM_ENVIRONMENT")) == NULL) 694 tcp = "SHELL"; 695 tsetenv(STRPROGRAM_ENVIRONMENT, quote(str2short(tcp))); 696 #endif /* _OSD_POSIX */ 697 698 #ifdef COLOR_LS_F 699 if ((tcp = getenv("LS_COLORS")) != NULL) 700 parseLS_COLORS(str2short(tcp)); 701 #endif /* COLOR_LS_F */ 702 703 doldol = putn((int) getpid()); /* For $$ */ 704 #ifdef WINNT_NATIVE 705 { 706 char *tmp; 707 Char *tmp2; 708 if ((tmp = getenv("TMP")) != NULL) { 709 tmp = xasprintf("%s/%s", tmp, "sh"); 710 tmp2 = SAVE(tmp); 711 xfree(tmp); 712 } 713 else { 714 tmp2 = SAVE(""); 715 } 716 shtemp = Strspl(tmp2, doldol); /* For << */ 717 xfree(tmp2); 718 } 719 #else /* !WINNT_NATIVE */ 720 shtemp = Strspl(STRtmpsh, doldol); /* For << */ 721 #endif /* WINNT_NATIVE */ 722 723 /* 724 * Record the interrupt states from the parent process. If the parent is 725 * non-interruptible our hand must be forced or we (and our children) won't 726 * be either. Our children inherit termination from our parent. We catch it 727 * only if we are the login shell. 728 */ 729 sigaction(SIGINT, NULL, &parintr); 730 sigaction(SIGTERM, NULL, &parterm); 731 732 733 #ifdef TCF 734 /* Enable process migration on ourselves and our progeny */ 735 (void) signal(SIGMIGRATE, SIG_DFL); 736 #endif /* TCF */ 737 738 /* 739 * dspkanji/dspmbyte autosetting 740 */ 741 /* PATCH IDEA FROM Issei.Suzuki VERY THANKS */ 742 #if defined(DSPMBYTE) 743 #if defined(NLS) && defined(LC_CTYPE) 744 if (((tcp = setlocale(LC_CTYPE, NULL)) != NULL || (tcp = getenv("LANG")) != NULL) && !adrof(CHECK_MBYTEVAR)) { 745 #else 746 if ((tcp = getenv("LANG")) != NULL && !adrof(CHECK_MBYTEVAR)) { 747 #endif 748 autoset_dspmbyte(str2short(tcp)); 749 } 750 #if defined(WINNT_NATIVE) 751 else if (!adrof(CHECK_MBYTEVAR)) 752 nt_autoset_dspmbyte(); 753 #endif /* WINNT_NATIVE */ 754 #endif 755 756 fix_version(); /* publish the shell version */ 757 758 if (argc > 1 && strcmp(argv[1], "--version") == 0) { 759 xprintf("%S\n", varval(STRversion)); 760 xexit(0); 761 } 762 if (argc > 1 && strcmp(argv[1], "--help") == 0) { 763 xprintf("%S\n\n", varval(STRversion)); 764 xprintf(CGETS(11, 8, HELP_STRING)); 765 xexit(0); 766 } 767 /* 768 * Process the arguments. 769 * 770 * Note that processing of -v/-x is actually delayed till after script 771 * processing. 772 * 773 * We set the first character of our name to be '-' if we are a shell 774 * running interruptible commands. Many programs which examine ps'es 775 * use this to filter such shells out. 776 */ 777 argc--, tempv++; 778 while (argc > 0 && (tcp = tempv[0])[0] == '-' && 779 *++tcp != '\0' && !batch) { 780 do 781 switch (*tcp++) { 782 783 case 0: /* - Interruptible, no prompt */ 784 prompt = 0; 785 setintr = 1; 786 nofile = 1; 787 break; 788 789 case 'b': /* -b Next arg is input file */ 790 batch = 1; 791 break; 792 793 case 'c': /* -c Command input from arg */ 794 if (argc == 1) 795 xexit(0); 796 argc--, tempv++; 797 #ifdef M_XENIX 798 /* Xenix Vi bug: 799 it relies on a 7 bit environment (/bin/sh), so it 800 pass ascii arguments with the 8th bit set */ 801 if (!strcmp(argv[0], "sh")) 802 { 803 char *p; 804 805 for (p = tempv[0]; *p; ++p) 806 *p &= ASCII; 807 } 808 #endif 809 arginp = SAVE(tempv[0]); 810 811 /* 812 * we put the command into a variable 813 */ 814 if (arginp != NULL) 815 setv(STRcommand, quote(Strsave(arginp)), VAR_READWRITE); 816 817 /* 818 * * Give an error on -c arguments that end in * backslash to 819 * ensure that you don't make * nonportable csh scripts. 820 */ 821 { 822 int count; 823 824 cp = Strend(arginp); 825 count = 0; 826 while (cp > arginp && *--cp == '\\') 827 ++count; 828 if ((count & 1) != 0) { 829 exiterr = 1; 830 stderror(ERR_ARGC); 831 } 832 } 833 prompt = 0; 834 nofile = 1; 835 break; 836 case 'd': /* -d Load directory stack from file */ 837 rdirs = 1; 838 break; 839 840 #ifdef apollo 841 case 'D': /* -D Define environment variable */ 842 { 843 Char *dp; 844 845 cp = str2short(tcp); 846 if (dp = Strchr(cp, '=')) { 847 *dp++ = '\0'; 848 tsetenv(cp, dp); 849 } 850 else 851 tsetenv(cp, STRNULL); 852 } 853 *tcp = '\0'; /* done with this argument */ 854 break; 855 #endif /* apollo */ 856 857 case 'e': /* -e Exit on any error */ 858 exiterr = 1; 859 break; 860 861 case 'f': /* -f Fast start */ 862 fast = 1; 863 break; 864 865 case 'i': /* -i Interactive, even if !intty */ 866 intact = 1; 867 nofile = 1; 868 break; 869 870 case 'm': /* -m read .cshrc (from su) */ 871 mflag = 1; 872 break; 873 874 case 'n': /* -n Don't execute */ 875 noexec = 1; 876 break; 877 878 case 'q': /* -q (Undoc'd) ... die on quit */ 879 quitit = 1; 880 break; 881 882 case 's': /* -s Read from std input */ 883 nofile = 1; 884 break; 885 886 case 't': /* -t Read one line from input */ 887 onelflg = 2; 888 prompt = 0; 889 nofile = 1; 890 break; 891 892 case 'v': /* -v Echo hist expanded input */ 893 nverbose = 1; /* ... later */ 894 break; 895 896 case 'x': /* -x Echo just before execution */ 897 nexececho = 1; /* ... later */ 898 break; 899 900 case 'V': /* -V Echo hist expanded input */ 901 setNS(STRverbose); /* NOW! */ 902 break; 903 904 case 'X': /* -X Echo just before execution */ 905 setNS(STRecho); /* NOW! */ 906 break; 907 908 case 'F': 909 /* 910 * This will cause children to be created using fork instead of 911 * vfork. 912 */ 913 use_fork = 1; 914 break; 915 916 case ' ': 917 case '\t': 918 /* 919 * for O/S's that don't do the argument parsing right in 920 * "#!/foo -f " scripts 921 */ 922 break; 923 924 default: /* Unknown command option */ 925 exiterr = 1; 926 stderror(ERR_TCSHUSAGE, tcp-1, progname); 927 break; 928 929 } while (*tcp); 930 tempv++, argc--; 931 } 932 933 if (quitit) /* With all due haste, for debugging */ 934 (void) signal(SIGQUIT, SIG_DFL); 935 936 /* 937 * Unless prevented by -, -c, -i, -s, or -t, if there are remaining 938 * arguments the first of them is the name of a shell file from which to 939 * read commands. 940 */ 941 if (nofile == 0 && argc > 0) { 942 nofile = xopen(tempv[0], O_RDONLY|O_LARGEFILE); 943 if (nofile < 0) { 944 child = 1; /* So this ... */ 945 /* ... doesn't return */ 946 stderror(ERR_SYSTEM, tempv[0], strerror(errno)); 947 } 948 #ifdef O_TEXT 949 setmode(nofile, O_TEXT); 950 #endif 951 xfree(ffile); 952 dolzero = 1; 953 ffile = SAVE(tempv[0]); 954 /* 955 * Replace FSHIN. Handle /dev/std{in,out,err} specially 956 * since once they are closed we cannot open them again. 957 * In that case we use our own saved descriptors 958 */ 959 if ((SHIN = dmove(nofile, FSHIN)) < 0) 960 switch(nofile) { 961 case 0: 962 SHIN = FSHIN; 963 break; 964 case 1: 965 SHIN = FSHOUT; 966 break; 967 case 2: 968 SHIN = FSHDIAG; 969 break; 970 default: 971 stderror(ERR_SYSTEM, tempv[0], strerror(errno)); 972 break; 973 } 974 (void) close_on_exec(SHIN, 1); 975 prompt = 0; 976 /* argc not used any more */ tempv++; 977 } 978 979 /* 980 * Call to closem() used to be part of initdesc(). Now called below where 981 * the script name argument has become stdin. Kernel may have used a file 982 * descriptor to hold the name of the script (setuid case) and this name 983 * mustn't be lost by closing the fd too soon. 984 */ 985 closem(); 986 987 /* 988 * Consider input a tty if it really is or we are interactive. but not for 989 * editing (christos) 990 */ 991 if (!(intty = isatty(SHIN))) { 992 if (adrof(STRedit)) 993 unsetv(STRedit); 994 editing = 0; 995 } 996 intty |= intact; 997 #ifndef convex 998 if (intty || (intact && isatty(SHOUT))) { 999 if (!batch && (uid != euid || gid != egid)) { 1000 errno = EACCES; 1001 child = 1; /* So this ... */ 1002 /* ... doesn't return */ 1003 stderror(ERR_SYSTEM, progname, strerror(errno)); 1004 } 1005 } 1006 #endif /* convex */ 1007 isoutatty = isatty(SHOUT); 1008 isdiagatty = isatty(SHDIAG); 1009 /* 1010 * Decide whether we should play with signals or not. If we are explicitly 1011 * told (via -i, or -) or we are a login shell (arg0 starts with -) or the 1012 * input and output are both the ttys("csh", or "csh</dev/ttyx>/dev/ttyx") 1013 * Note that in only the login shell is it likely that parent may have set 1014 * signals to be ignored 1015 */ 1016 if (loginsh || intact || (intty && isatty(SHOUT))) 1017 setintr = 1; 1018 settell(); 1019 /* 1020 * Save the remaining arguments in argv. 1021 */ 1022 setq(STRargv, blk2short(tempv), &shvhed, VAR_READWRITE); 1023 1024 /* 1025 * Set up the prompt. 1026 */ 1027 if (prompt) { 1028 if (tcsh) 1029 setcopy(STRprompt, STRdeftcshprompt, VAR_READWRITE); 1030 else 1031 setcopy(STRprompt, STRdefcshprompt, VAR_READWRITE); 1032 /* that's a meta-questionmark */ 1033 setcopy(STRprompt2, STRmquestion, VAR_READWRITE); 1034 setcopy(STRprompt3, STRKCORRECT, VAR_READWRITE); 1035 } 1036 1037 /* 1038 * If we are an interactive shell, then start fiddling with the signals; 1039 * this is a tricky game. 1040 */ 1041 shpgrp = mygetpgrp(); 1042 opgrp = tpgrp = -1; 1043 if (setintr) { 1044 struct sigaction osig; 1045 1046 **argv = '-'; 1047 if (!quitit) /* Wary! */ 1048 (void) signal(SIGQUIT, SIG_IGN); 1049 pintr_disabled = 1; 1050 sigset_interrupting(SIGINT, queue_pintr); 1051 (void) signal(SIGTERM, SIG_IGN); 1052 1053 /* 1054 * No reason I can see not to save history on all these events.. 1055 * Most usual occurrence is in a window system, where we're not a login 1056 * shell, but might as well be... (sg) 1057 * But there might be races when lots of shells exit together... 1058 * [this is also incompatible]. 1059 * We have to be mre careful here. If the parent wants to 1060 * ignore the signals then we leave them untouched... 1061 * We also only setup the handlers for shells that are trully 1062 * interactive. 1063 */ 1064 sigaction(SIGHUP, NULL, &osig); 1065 if (loginsh || osig.sa_handler != SIG_IGN) 1066 /* exit processing on HUP */ 1067 sigset_interrupting(SIGHUP, queue_phup); 1068 #ifdef SIGXCPU 1069 sigaction(SIGXCPU, NULL, &osig); 1070 if (loginsh || osig.sa_handler != SIG_IGN) 1071 /* exit processing on XCPU */ 1072 sigset_interrupting(SIGXCPU, queue_phup); 1073 #endif 1074 #ifdef SIGXFSZ 1075 sigaction(SIGXFSZ, NULL, &osig); 1076 if (loginsh || osig.sa_handler != SIG_IGN) 1077 /* exit processing on XFSZ */ 1078 sigset_interrupting(SIGXFSZ, queue_phup); 1079 #endif 1080 1081 if (quitit == 0 && arginp == 0) { 1082 #ifdef SIGTSTP 1083 (void) signal(SIGTSTP, SIG_IGN); 1084 #endif 1085 #ifdef SIGTTIN 1086 (void) signal(SIGTTIN, SIG_IGN); 1087 #endif 1088 #ifdef SIGTTOU 1089 (void) signal(SIGTTOU, SIG_IGN); 1090 #endif 1091 /* 1092 * Wait till in foreground, in case someone stupidly runs csh & 1093 * dont want to try to grab away the tty. 1094 */ 1095 if (isatty(FSHDIAG)) 1096 f = FSHDIAG; 1097 else if (isatty(FSHOUT)) 1098 f = FSHOUT; 1099 else if (isatty(OLDSTD)) 1100 f = OLDSTD; 1101 else 1102 f = -1; 1103 1104 #ifdef NeXT 1105 /* NeXT 2.0 /usr/etc/rlogind, does not set our process group! */ 1106 if (shpgrp == 0) { 1107 shpgrp = getpid(); 1108 (void) setpgid(0, shpgrp); 1109 (void) tcsetpgrp(f, shpgrp); 1110 } 1111 #endif /* NeXT */ 1112 #ifdef BSDJOBS /* if we have tty job control */ 1113 retry: 1114 if ((tpgrp = tcgetpgrp(f)) != -1) { 1115 if (tpgrp != shpgrp) { 1116 struct sigaction old; 1117 1118 sigaction(SIGTTIN, NULL, &old); 1119 signal(SIGTTIN, SIG_DFL); 1120 (void) kill(0, SIGTTIN); 1121 sigaction(SIGTTIN, &old, NULL); 1122 goto retry; 1123 } 1124 /* 1125 * Thanks to Matt Day for the POSIX references, and to 1126 * Paul Close for the SGI clarification. 1127 */ 1128 if (setdisc(f) != -1) { 1129 opgrp = shpgrp; 1130 shpgrp = getpid(); 1131 tpgrp = shpgrp; 1132 if (tcsetpgrp(f, shpgrp) == -1) { 1133 /* 1134 * On hpux 7.03 this fails with EPERM. This happens on 1135 * the 800 when opgrp != shpgrp at this point. (we were 1136 * forked from a non job control shell) 1137 * POSIX 7.2.4, says we failed because the process 1138 * group specified did not belong to a process 1139 * in the same session with the tty. So we set our 1140 * process group and try again. 1141 */ 1142 if (setpgid(0, shpgrp) == -1) { 1143 xprintf("setpgid:"); 1144 goto notty; 1145 } 1146 if (tcsetpgrp(f, shpgrp) == -1) { 1147 xprintf("tcsetpgrp:"); 1148 goto notty; 1149 } 1150 } 1151 /* 1152 * We check the process group now. If it is the same, then 1153 * we don't need to set it again. On hpux 7.0 on the 300's 1154 * if we set it again it fails with EPERM. This is the 1155 * correct behavior according to POSIX 4.3.3 if the process 1156 * was a session leader . 1157 */ 1158 else if (shpgrp != mygetpgrp()) { 1159 if(setpgid(0, shpgrp) == -1) { 1160 xprintf("setpgid:"); 1161 goto notty; 1162 } 1163 } 1164 #ifdef IRIS4D 1165 /* 1166 * But on irix 3.3 we need to set it again, even if it is 1167 * the same. We do that to tell the system that we 1168 * need BSD process group compatibility. 1169 */ 1170 else 1171 (void) setpgid(0, shpgrp); 1172 #endif 1173 (void) close_on_exec(dcopy(f, FSHTTY), 1); 1174 } 1175 else 1176 tpgrp = -1; 1177 } 1178 if (tpgrp == -1) { 1179 notty: 1180 xprintf(CGETS(11, 1, "Warning: no access to tty (%s).\n"), 1181 strerror(errno)); 1182 xprintf(CGETS(11, 2, "Thus no job control in this shell.\n")); 1183 /* 1184 * Fix from:Sakari Jalovaara <sja@sirius.hut.fi> if we don't 1185 * have access to tty, disable editing too 1186 */ 1187 if (adrof(STRedit)) 1188 unsetv(STRedit); 1189 editing = 0; 1190 } 1191 #else /* BSDJOBS */ /* don't have job control, so frotz it */ 1192 tpgrp = -1; 1193 #endif /* BSDJOBS */ 1194 } 1195 } 1196 if (setintr == 0 && parintr.sa_handler == SIG_DFL) 1197 setintr = 1; 1198 1199 /* 1200 * SVR4 doesn't send a SIGCHLD when a child is stopped or continued if the 1201 * handler is installed with signal(2) or sigset(2). sigaction(2) must 1202 * be used instead. 1203 * 1204 * David Dawes (dawes@physics.su.oz.au) Sept 1991 1205 */ 1206 sigset_interrupting(SIGCHLD, queue_pchild); 1207 1208 if (intty && !arginp) 1209 (void) ed_Setup(editing);/* Get the tty state, and set defaults */ 1210 /* Only alter the tty state if editing */ 1211 1212 /* 1213 * Set an exit here in case of an interrupt or error reading the shell 1214 * start-up scripts. 1215 */ 1216 osetintr = setintr; 1217 oparintr = parintr; 1218 (void)cleanup_push_mark(); /* There is no outer handler */ 1219 if (setexit() != 0) /* PWP */ 1220 reenter = 1; 1221 else 1222 reenter = 0; 1223 exitset++; 1224 haderr = 0; /* In case second time through */ 1225 if (!fast && reenter == 0) { 1226 /* Will have varval(STRhome) here because set fast if don't */ 1227 { 1228 pintr_disabled++; 1229 cleanup_push(&pintr_disabled, disabled_cleanup); 1230 setintr = 0;/*FIXRESET:cleanup*/ 1231 /* onintr in /etc/ files has no effect */ 1232 parintr.sa_handler = SIG_IGN;/*FIXRESET: cleanup*/ 1233 #ifdef LOGINFIRST 1234 #ifdef _PATH_DOTLOGIN 1235 if (loginsh) 1236 (void) srcfile(_PATH_DOTLOGIN, 0, 0, NULL); 1237 #endif 1238 #endif 1239 1240 #ifdef _PATH_DOTCSHRC 1241 (void) srcfile(_PATH_DOTCSHRC, 0, 0, NULL); 1242 #endif 1243 if (!arginp && !onelflg && !havhash) 1244 dohash(NULL,NULL); 1245 #ifndef LOGINFIRST 1246 #ifdef _PATH_DOTLOGIN 1247 if (loginsh) 1248 (void) srcfile(_PATH_DOTLOGIN, 0, 0, NULL); 1249 #endif 1250 #endif 1251 cleanup_until(&pintr_disabled); 1252 setintr = osetintr; 1253 parintr = oparintr; 1254 } 1255 #ifdef LOGINFIRST 1256 if (loginsh) 1257 (void) srccat(varval(STRhome), STRsldotlogin); 1258 #endif 1259 /* upward compat. */ 1260 if (!srccat(varval(STRhome), STRsldottcshrc)) 1261 (void) srccat(varval(STRhome), STRsldotcshrc); 1262 1263 if (!arginp && !onelflg && !havhash) 1264 dohash(NULL,NULL); 1265 1266 /* 1267 * Source history before .login so that it is available in .login 1268 */ 1269 loadhist(NULL, 0); 1270 #ifndef LOGINFIRST 1271 if (loginsh) 1272 (void) srccat(varval(STRhome), STRsldotlogin); 1273 #endif 1274 if (loginsh || rdirs) 1275 loaddirs(NULL); 1276 } 1277 /* Reset interrupt flag */ 1278 setintr = osetintr; 1279 parintr = oparintr; 1280 exitset--; 1281 1282 /* Initing AFTER .cshrc is the Right Way */ 1283 if (intty && !arginp) { /* PWP setup stuff */ 1284 ed_Init(); /* init the new line editor */ 1285 #ifdef SIG_WINDOW 1286 check_window_size(1); /* mung environment */ 1287 #endif /* SIG_WINDOW */ 1288 } 1289 1290 /* 1291 * Now are ready for the -v and -x flags 1292 */ 1293 if (nverbose) 1294 setNS(STRverbose); 1295 if (nexececho) 1296 setNS(STRecho); 1297 1298 /* 1299 * All the rest of the world is inside this call. The argument to process 1300 * indicates whether it should catch "error unwinds". Thus if we are a 1301 * interactive shell our call here will never return by being blown past on 1302 * an error. 1303 */ 1304 process(setintr); 1305 1306 /* 1307 * Mop-up. 1308 */ 1309 if (intty) { 1310 if (loginsh) { 1311 xprintf("logout\n"); 1312 xclose(SHIN); 1313 child = 1; 1314 #ifdef TESLA 1315 do_logout = 1; 1316 #endif /* TESLA */ 1317 goodbye(NULL, NULL); 1318 } 1319 else { 1320 xprintf("exit\n"); 1321 } 1322 } 1323 record(); 1324 exitstat(); 1325 return (0); 1326 } 1327 1328 void 1329 untty(void) 1330 { 1331 #ifdef BSDJOBS 1332 if (tpgrp > 0 && opgrp != shpgrp) { 1333 (void) setpgid(0, opgrp); 1334 (void) tcsetpgrp(FSHTTY, opgrp); 1335 (void) resetdisc(FSHTTY); 1336 } 1337 #endif /* BSDJOBS */ 1338 } 1339 1340 void 1341 importpath(Char *cp) 1342 { 1343 size_t i = 0; 1344 Char *dp; 1345 Char **pv; 1346 int c; 1347 1348 for (dp = cp; *dp; dp++) 1349 if (*dp == PATHSEP) 1350 i++; 1351 /* 1352 * i+2 where i is the number of colons in the path. There are i+1 1353 * directories in the path plus we need room for a zero terminator. 1354 */ 1355 pv = xcalloc(i + 2, sizeof(Char *)); 1356 dp = cp; 1357 i = 0; 1358 if (*dp) 1359 for (;;) { 1360 if ((c = *dp) == PATHSEP || c == 0) { 1361 *dp = 0; 1362 pv[i++] = Strsave(*cp ? cp : STRdot); 1363 if (c) { 1364 cp = dp + 1; 1365 *dp = PATHSEP; 1366 } 1367 else 1368 break; 1369 } 1370 #ifdef WINNT_NATIVE 1371 else if (*dp == '\\') 1372 *dp = '/'; 1373 #endif /* WINNT_NATIVE */ 1374 dp++; 1375 } 1376 pv[i] = 0; 1377 cleanup_push(pv, blk_cleanup); 1378 setq(STRpath, pv, &shvhed, VAR_READWRITE); 1379 cleanup_ignore(pv); 1380 cleanup_until(pv); 1381 } 1382 1383 /* 1384 * Source to the file which is the catenation of the argument names. 1385 */ 1386 static int 1387 srccat(Char *cp, Char *dp) 1388 { 1389 if (cp[0] == '/' && cp[1] == '\0') 1390 return srcfile(short2str(dp), (mflag ? 0 : 1), 0, NULL); 1391 else { 1392 Char *ep; 1393 char *ptr; 1394 int rv; 1395 1396 #ifdef WINNT_NATIVE 1397 ep = Strend(cp); 1398 if (ep != cp && ep[-1] == '/' && dp[0] == '/') /* silly win95 */ 1399 dp++; 1400 #endif /* WINNT_NATIVE */ 1401 1402 ep = Strspl(cp, dp); 1403 cleanup_push(ep, xfree); 1404 ptr = short2str(ep); 1405 1406 rv = srcfile(ptr, (mflag ? 0 : 1), 0, NULL); 1407 cleanup_until(ep); 1408 return rv; 1409 } 1410 } 1411 1412 /* 1413 * Source to a file putting the file descriptor in a safe place (> 2). 1414 */ 1415 #ifndef WINNT_NATIVE 1416 static int 1417 #else 1418 int 1419 #endif /*WINNT_NATIVE*/ 1420 srcfile(const char *f, int onlyown, int flag, Char **av) 1421 { 1422 int unit; 1423 1424 if ((unit = xopen(f, O_RDONLY|O_LARGEFILE)) == -1) 1425 return 0; 1426 #ifdef O_TEXT 1427 setmode(unit, O_TEXT); 1428 #endif 1429 cleanup_push(&unit, open_cleanup); 1430 unit = dmove(unit, -1); 1431 cleanup_ignore(&unit); 1432 cleanup_until(&unit); 1433 1434 (void) close_on_exec(unit, 1); 1435 srcunit(unit, onlyown, flag, av); 1436 return 1; 1437 } 1438 1439 1440 /* 1441 * Save the shell state, and establish new argument vector, and new input 1442 * fd. 1443 */ 1444 static void 1445 st_save(struct saved_state *st, int unit, int hflg, Char **al, Char **av) 1446 { 1447 st->insource = insource; 1448 st->SHIN = SHIN; 1449 /* Want to preserve the meaning of "source file >output". 1450 * Save old descriptors, move new 0,1,2 to safe places and assign 1451 * them to SH* and let process() redo 0,1,2 from them. 1452 * 1453 * The macro returns true if d1 and d2 are good and they point to 1454 * different things. If you don't avoid saving duplicate 1455 * descriptors, you really limit the depth of "source" recursion 1456 * you can do because of all the open file descriptors. -IAN! 1457 */ 1458 #define NEED_SAVE_FD(d1,d2) \ 1459 (fstat(d1, &s1) != -1 && fstat(d2, &s2) != -1 \ 1460 && (s1.st_ino != s2.st_ino || s1.st_dev != s2.st_dev) ) 1461 1462 st->OLDSTD = st->SHOUT = st->SHDIAG = -1;/* test later to restore these */ 1463 if (didfds) { 1464 struct stat s1, s2; 1465 if (NEED_SAVE_FD(0,OLDSTD)) { 1466 st->OLDSTD = OLDSTD; 1467 OLDSTD = dmove(0, -1); 1468 (void)close_on_exec(OLDSTD, 1); 1469 } 1470 if (NEED_SAVE_FD(1,SHOUT)) { 1471 st->SHOUT = SHOUT; 1472 SHOUT = dmove(1, -1); 1473 (void)close_on_exec(SHOUT, 1); 1474 } 1475 if (NEED_SAVE_FD(2,SHDIAG)) { 1476 st->SHDIAG = SHDIAG; 1477 SHDIAG = dmove(2, -1); 1478 (void)close_on_exec(SHDIAG, 1); 1479 } 1480 donefds(); 1481 } 1482 1483 st->intty = intty; 1484 st->whyles = whyles; 1485 st->gointr = gointr; 1486 st->arginp = arginp; 1487 st->evalp = evalp; 1488 st->evalvec = evalvec; 1489 st->alvecp = alvecp; 1490 st->alvec = alvec; 1491 st->onelflg = onelflg; 1492 st->enterhist = enterhist; 1493 if (hflg) 1494 st->HIST = HIST; 1495 else 1496 st->HIST = '\0'; 1497 st->cantell = cantell; 1498 cpybin(st->B, B); 1499 1500 /* 1501 * we can now pass arguments to source. 1502 * For compatibility we do that only if arguments were really 1503 * passed, otherwise we keep the old, global $argv like before. 1504 */ 1505 if (av != NULL && *av != NULL) { 1506 struct varent *vp; 1507 if ((vp = adrof(STRargv)) != NULL && vp->vec != NULL) 1508 st->argv = saveblk(vp->vec); 1509 else 1510 st->argv = NULL; 1511 setq(STRargv, saveblk(av), &shvhed, VAR_READWRITE); 1512 } 1513 else 1514 st->argv = NULL; 1515 st->av = av; 1516 1517 SHIN = unit; /* Do this first */ 1518 1519 /* Establish new input arena */ 1520 { 1521 fbuf = NULL; 1522 fseekp = feobp = fblocks = 0; 1523 settell(); 1524 } 1525 1526 arginp = 0; 1527 onelflg = 0; 1528 intty = isatty(SHIN); 1529 whyles = 0; 1530 gointr = 0; 1531 evalvec = 0; 1532 evalp = 0; 1533 alvec = al; 1534 alvecp = 0; 1535 enterhist = hflg; 1536 if (enterhist) 1537 HIST = '\0'; 1538 insource = 1; 1539 } 1540 1541 1542 /* 1543 * Restore the shell to a saved state 1544 */ 1545 static void 1546 st_restore(void *xst) 1547 { 1548 struct saved_state *st; 1549 1550 st = xst; 1551 if (st->SHIN == -1) 1552 return; 1553 1554 /* Reset input arena */ 1555 { 1556 int i; 1557 Char** nfbuf = fbuf; 1558 int nfblocks = fblocks; 1559 1560 fblocks = 0; 1561 fbuf = NULL; 1562 for (i = 0; i < nfblocks; i++) 1563 xfree(nfbuf[i]); 1564 xfree(nfbuf); 1565 } 1566 cpybin(B, st->B); 1567 1568 xclose(SHIN); 1569 1570 insource = st->insource; 1571 SHIN = st->SHIN; 1572 if (st->OLDSTD != -1) 1573 xclose(OLDSTD), OLDSTD = st->OLDSTD; 1574 if (st->SHOUT != -1) 1575 xclose(SHOUT), SHOUT = st->SHOUT; 1576 if (st->SHDIAG != -1) 1577 xclose(SHDIAG), SHDIAG = st->SHDIAG; 1578 arginp = st->arginp; 1579 onelflg = st->onelflg; 1580 evalp = st->evalp; 1581 evalvec = st->evalvec; 1582 alvecp = st->alvecp; 1583 alvec = st->alvec; 1584 intty = st->intty; 1585 whyles = st->whyles; 1586 gointr = st->gointr; 1587 if (st->HIST != '\0') 1588 HIST = st->HIST; 1589 enterhist = st->enterhist; 1590 cantell = st->cantell; 1591 1592 if (st->argv != NULL) 1593 setq(STRargv, st->argv, &shvhed, VAR_READWRITE); 1594 else if (st->av != NULL && *st->av != NULL && adrof(STRargv) != NULL) 1595 unsetv(STRargv); 1596 } 1597 1598 /* 1599 * Source to a unit. If onlyown it must be our file or our group or 1600 * we don't chance it. This occurs on ".cshrc"s and the like. 1601 */ 1602 static void 1603 srcunit(int unit, int onlyown, int hflg, Char **av) 1604 { 1605 struct saved_state st; 1606 1607 st.SHIN = -1; /* st_restore checks this */ 1608 1609 if (unit < 0) 1610 return; 1611 1612 if (onlyown) { 1613 struct stat stb; 1614 1615 if (fstat(unit, &stb) < 0) { 1616 xclose(unit); 1617 return; 1618 } 1619 } 1620 1621 /* Does nothing before st_save() because st.SHIN == -1 */ 1622 cleanup_push(&st, st_restore); 1623 if (setintr) { 1624 pintr_disabled++; 1625 cleanup_push(&pintr_disabled, disabled_cleanup); 1626 } 1627 1628 /* Save the current state and move us to a new state */ 1629 st_save(&st, unit, hflg, NULL, av); 1630 1631 /* 1632 * Now if we are allowing commands to be interrupted, we let ourselves be 1633 * interrupted. 1634 */ 1635 if (setintr) { 1636 cleanup_until(&pintr_disabled); 1637 pintr_disabled++; 1638 cleanup_push(&pintr_disabled, disabled_cleanup); 1639 } 1640 1641 process(0); /* 0 -> blow away on errors */ 1642 1643 /* Restore the old state */ 1644 cleanup_until(&st); 1645 } 1646 1647 1648 /*ARGSUSED*/ 1649 void 1650 goodbye(Char **v, struct command *c) 1651 { 1652 USE(v); 1653 USE(c); 1654 record(); 1655 1656 if (loginsh) { 1657 size_t omark; 1658 sigset_t set; 1659 1660 signal(SIGQUIT, SIG_IGN); 1661 sigaddset(&set, SIGQUIT); 1662 sigprocmask(SIG_UNBLOCK, &set, NULL); 1663 signal(SIGINT, SIG_IGN); 1664 sigaddset(&set, SIGINT); 1665 signal(SIGTERM, SIG_IGN); 1666 sigaddset(&set, SIGTERM); 1667 signal(SIGHUP, SIG_IGN); 1668 sigaddset(&set, SIGHUP); 1669 sigprocmask(SIG_UNBLOCK, &set, NULL); 1670 phup_disabled = 1; 1671 setintr = 0; /* No interrupts after "logout" */ 1672 /* Trap errors inside .logout */ 1673 omark = cleanup_push_mark(); 1674 if (setexit() == 0) { 1675 if (!(adrof(STRlogout))) 1676 setcopy(STRlogout, STRnormal, VAR_READWRITE); 1677 #ifdef _PATH_DOTLOGOUT 1678 (void) srcfile(_PATH_DOTLOGOUT, 0, 0, NULL); 1679 #endif 1680 if (adrof(STRhome)) 1681 (void) srccat(varval(STRhome), STRsldtlogout); 1682 #ifdef TESLA 1683 do_logout = 1; 1684 #endif /* TESLA */ 1685 } 1686 cleanup_pop_mark(omark); 1687 } 1688 exitstat(); 1689 } 1690 1691 void 1692 exitstat(void) 1693 { 1694 #ifdef PROF 1695 monitor(0); 1696 #endif 1697 /* 1698 * Note that if STATUS is corrupted (i.e. getn bombs) then error will exit 1699 * directly because we poke child here. Otherwise we might continue 1700 * unwarrantedly (sic). 1701 */ 1702 child = 1; 1703 1704 xexit(getn(varval(STRstatus))); 1705 } 1706 1707 /* 1708 * in the event of a HUP we want to save the history 1709 */ 1710 void 1711 phup(void) 1712 { 1713 if (loginsh) { 1714 setcopy(STRlogout, STRhangup, VAR_READWRITE); 1715 #ifdef _PATH_DOTLOGOUT 1716 (void) srcfile(_PATH_DOTLOGOUT, 0, 0, NULL); 1717 #endif 1718 if (adrof(STRhome)) 1719 (void) srccat(varval(STRhome), STRsldtlogout); 1720 } 1721 1722 record(); 1723 1724 #ifdef POSIXJOBS 1725 /* 1726 * We kill the last foreground process group. It then becomes 1727 * responsible to propagate the SIGHUP to its progeny. 1728 */ 1729 { 1730 struct process *pp, *np; 1731 1732 for (pp = proclist.p_next; pp; pp = pp->p_next) { 1733 np = pp; 1734 /* 1735 * Find if this job is in the foreground. It could be that 1736 * the process leader has exited and the foreground flag 1737 * is cleared for it. 1738 */ 1739 do 1740 /* 1741 * If a process is in the foreground we try to kill 1742 * it's process group. If we succeed, then the 1743 * whole job is gone. Otherwise we keep going... 1744 * But avoid sending HUP to the shell again. 1745 */ 1746 if (((np->p_flags & PFOREGND) != 0) && np->p_jobid != shpgrp) { 1747 np->p_flags &= ~PHUP; 1748 if (killpg(np->p_jobid, SIGHUP) != -1) { 1749 /* In case the job was suspended... */ 1750 #ifdef SIGCONT 1751 (void) killpg(np->p_jobid, SIGCONT); 1752 #endif 1753 break; 1754 } 1755 } 1756 while ((np = np->p_friends) != pp); 1757 } 1758 } 1759 #endif /* POSIXJOBS */ 1760 1761 xexit(SIGHUP); 1762 } 1763 1764 static Char *jobargv[2] = {STRjobs, 0}; 1765 1766 /* 1767 * Catch an interrupt, e.g. during lexical input. 1768 * If we are an interactive shell, we reset the interrupt catch 1769 * immediately. In any case we drain the shell output, 1770 * and finally go through the normal error mechanism, which 1771 * gets a chance to make the shell go away. 1772 */ 1773 int just_signaled; /* bugfix by Michael Bloom (mg@ttidca.TTI.COM) */ 1774 1775 void 1776 pintr(void) 1777 { 1778 just_signaled = 1; 1779 pintr1(1); 1780 } 1781 1782 void 1783 pintr1(int wantnl) 1784 { 1785 if (setintr) { 1786 if (pjobs) { 1787 pjobs = 0; 1788 xputchar('\n'); 1789 dojobs(jobargv, NULL); 1790 stderror(ERR_NAME | ERR_INTR); 1791 } 1792 } 1793 /* MH - handle interrupted completions specially */ 1794 { 1795 if (InsideCompletion) 1796 stderror(ERR_SILENT); 1797 } 1798 /* JV - Make sure we shut off inputl */ 1799 { 1800 (void) Cookedmode(); 1801 GettingInput = 0; 1802 } 1803 drainoline(); 1804 #ifdef HAVE_GETPWENT 1805 (void) endpwent(); 1806 #endif 1807 1808 /* 1809 * If we have an active "onintr" then we search for the label. Note that if 1810 * one does "onintr -" then we shan't be interruptible so we needn't worry 1811 * about that here. 1812 */ 1813 if (gointr) { 1814 gotolab(gointr); 1815 reset(); 1816 } 1817 else if (intty && wantnl) { 1818 if (editing) { 1819 /* 1820 * If we are editing a multi-line input command, and move to 1821 * the beginning of the line, we don't want to trash it when 1822 * we hit ^C 1823 */ 1824 PastBottom(); 1825 ClearLines(); 1826 ClearDisp(); 1827 } 1828 else { 1829 /* xputchar('\n'); *//* Some like this, others don't */ 1830 (void) putraw('\r'); 1831 (void) putraw('\n'); 1832 } 1833 } 1834 stderror(ERR_SILENT); 1835 } 1836 1837 /* 1838 * Process is the main driving routine for the shell. 1839 * It runs all command processing, except for those within { ... } 1840 * in expressions (which is run by a routine evalav in sh.exp.c which 1841 * is a stripped down process), and `...` evaluation which is run 1842 * also by a subset of this code in sh.glob.c in the routine backeval. 1843 * 1844 * The code here is a little strange because part of it is interruptible 1845 * and hence freeing of structures appears to occur when none is necessary 1846 * if this is ignored. 1847 * 1848 * Note that if catch is not set then we will unwind on any error. 1849 * If an end-of-file occurs, we return. 1850 */ 1851 void 1852 process(int catch) 1853 { 1854 jmp_buf_t osetexit; 1855 /* PWP: This might get nuked my longjmp so don't make it a register var */ 1856 size_t omark; 1857 1858 getexit(osetexit); 1859 omark = cleanup_push_mark(); 1860 exitset++; 1861 for (;;) { 1862 struct command *t; 1863 int hadhist, old_pintr_disabled; 1864 1865 (void) setexit(); 1866 pendjob(); 1867 1868 justpr = enterhist; /* execute if not entering history */ 1869 1870 if (haderr) { 1871 if (!catch) { 1872 /* unwind */ 1873 doneinp = 0; 1874 cleanup_pop_mark(omark); 1875 resexit(osetexit); 1876 reset(); 1877 } 1878 haderr = 0; 1879 /* 1880 * Every error is eventually caught here or the shell dies. It is 1881 * at this point that we clean up any left-over open files, by 1882 * closing all but a fixed number of pre-defined files. Thus 1883 * routines don't have to worry about leaving files open due to 1884 * deeper errors... they will get closed here. 1885 */ 1886 closem(); 1887 continue; 1888 } 1889 if (doneinp) { 1890 doneinp = 0; 1891 break; 1892 } 1893 if (chkstop) 1894 chkstop--; 1895 if (neednote) 1896 pnote(); 1897 if (intty && prompt && evalvec == 0) { 1898 just_signaled = 0; 1899 mailchk(); 1900 /* 1901 * Watch for logins/logouts. Next is scheduled commands stored 1902 * previously using "sched." Then execute periodic commands. 1903 * Following that, the prompt precmd is run. 1904 */ 1905 #ifndef HAVENOUTMP 1906 watch_login(0); 1907 #endif /* !HAVENOUTMP */ 1908 sched_run(); 1909 period_cmd(); 1910 precmd(); 1911 /* 1912 * If we are at the end of the input buffer then we are going to 1913 * read fresh stuff. Otherwise, we are rereading input and don't 1914 * need or want to prompt. 1915 */ 1916 if (fseekp == feobp && aret == TCSH_F_SEEK) 1917 printprompt(0, NULL); 1918 flush(); 1919 setalarm(1); 1920 } 1921 if (seterr) { 1922 xfree(seterr); 1923 seterr = NULL; 1924 } 1925 1926 /* 1927 * Interruptible during interactive reads 1928 */ 1929 if (setintr) 1930 pintr_push_enable(&old_pintr_disabled); 1931 hadhist = lex(¶ml); 1932 if (setintr) 1933 cleanup_until(&old_pintr_disabled); 1934 cleanup_push(¶ml, lex_cleanup); 1935 1936 /* 1937 * Echo not only on VERBOSE, but also with history expansion. If there 1938 * is a lexical error then we forego history echo. 1939 */ 1940 if ((hadhist && !seterr && intty && !tellwhat && !Expand && !whyles) || 1941 adrof(STRverbose)) { 1942 int odidfds = didfds; 1943 haderr = 1; 1944 didfds = 0; 1945 prlex(¶ml); 1946 flush(); 1947 haderr = 0; 1948 didfds = odidfds; 1949 } 1950 (void) alarm(0); /* Autologout OFF */ 1951 alrmcatch_disabled = 1; 1952 1953 /* 1954 * Save input text on the history list if reading in old history, or it 1955 * is from the terminal at the top level and not in a loop. 1956 * 1957 * PWP: entry of items in the history list while in a while loop is done 1958 * elsewhere... 1959 */ 1960 if (enterhist || (catch && intty && !whyles && !tellwhat && !arun)) 1961 savehist(¶ml, enterhist > 1); 1962 1963 if (Expand && seterr) 1964 Expand = 0; 1965 1966 /* 1967 * Print lexical error messages, except when sourcing history lists. 1968 */ 1969 if (!enterhist && seterr) 1970 stderror(ERR_OLD); 1971 1972 /* 1973 * If had a history command :p modifier then this is as far as we 1974 * should go 1975 */ 1976 if (justpr) 1977 goto cmd_done; 1978 1979 /* 1980 * If had a tellwhat from twenex() then do 1981 */ 1982 if (tellwhat) { 1983 (void) tellmewhat(¶ml, NULL); 1984 goto cmd_done; 1985 } 1986 1987 alias(¶ml); 1988 1989 #ifdef BSDJOBS 1990 /* 1991 * If we are interactive, try to continue jobs that we have stopped 1992 */ 1993 if (prompt) 1994 continue_jobs(¶ml); 1995 #endif /* BSDJOBS */ 1996 1997 /* 1998 * Check to see if the user typed "rm * .o" or something 1999 */ 2000 if (prompt) 2001 rmstar(¶ml); 2002 /* 2003 * Parse the words of the input into a parse tree. 2004 */ 2005 t = syntax(paraml.next, ¶ml, 0); 2006 cleanup_push(t, syntax_cleanup); 2007 if (seterr) 2008 stderror(ERR_OLD); 2009 2010 postcmd(); 2011 /* 2012 * Execute the parse tree From: Michael Schroeder 2013 * <mlschroe@immd4.informatik.uni-erlangen.de> was execute(t, tpgrp); 2014 */ 2015 execute(t, (tpgrp > 0 ? tpgrp : -1), NULL, NULL, TRUE); 2016 2017 /* 2018 * Made it! 2019 */ 2020 #ifdef SIG_WINDOW 2021 if (windowchg || (catch && intty && !whyles && !tellwhat)) { 2022 (void) check_window_size(0); /* for window systems */ 2023 } 2024 #endif /* SIG_WINDOW */ 2025 setcopy(STR_, InputBuf, VAR_READWRITE | VAR_NOGLOB); 2026 cmd_done: 2027 cleanup_until(¶ml); 2028 } 2029 exitset--; 2030 cleanup_pop_mark(omark); 2031 resexit(osetexit); 2032 } 2033 2034 /*ARGSUSED*/ 2035 void 2036 dosource(Char **t, struct command *c) 2037 { 2038 Char *f; 2039 int hflg = 0; 2040 char *file; 2041 2042 USE(c); 2043 t++; 2044 if (*t && eq(*t, STRmh)) { 2045 if (*++t == NULL) 2046 stderror(ERR_NAME | ERR_HFLAG); 2047 hflg++; 2048 } 2049 else if (*t && eq(*t, STRmm)) { 2050 if (*++t == NULL) 2051 stderror(ERR_NAME | ERR_MFLAG); 2052 hflg = 2; 2053 } 2054 2055 f = globone(*t++, G_ERROR); 2056 file = strsave(short2str(f)); 2057 cleanup_push(file, xfree); 2058 xfree(f); 2059 t = glob_all_or_error(t); 2060 if ((!srcfile(file, 0, hflg, t)) && (!hflg) && (!bequiet)) 2061 stderror(ERR_SYSTEM, file, strerror(errno)); 2062 cleanup_until(file); 2063 } 2064 2065 /* 2066 * Check for mail. 2067 * If we are a login shell, then we don't want to tell 2068 * about any mail file unless its been modified 2069 * after the time we started. 2070 * This prevents us from telling the user things he already 2071 * knows, since the login program insists on saying 2072 * "You have mail." 2073 */ 2074 2075 /* 2076 * The AMS version. 2077 * This version checks if the file is a directory, and if so, 2078 * tells you the number of files in it, otherwise do the old thang. 2079 * The magic "+1" in the time calculation is to compensate for 2080 * an AFS bug where directory mtimes are set to 1 second in 2081 * the future. 2082 */ 2083 2084 static void 2085 mailchk(void) 2086 { 2087 struct varent *v; 2088 Char **vp; 2089 time_t t; 2090 int intvl, cnt; 2091 struct stat stb; 2092 int new; 2093 2094 v = adrof(STRmail); 2095 if (v == NULL || v->vec == NULL) 2096 return; 2097 (void) time(&t); 2098 vp = v->vec; 2099 cnt = blklen(vp); 2100 intvl = (cnt && number(*vp)) ? (--cnt, getn(*vp++)) : MAILINTVL; 2101 if (intvl < 1) 2102 intvl = 1; 2103 if (chktim + intvl > t) 2104 return; 2105 for (; *vp; vp++) { 2106 char *filename = short2str(*vp); 2107 char *mboxdir = filename; 2108 2109 if (stat(filename, &stb) < 0) 2110 continue; 2111 #if defined(BSDTIMES) || defined(_SEQUENT_) 2112 new = stb.st_mtime > time0.tv_sec; 2113 #else 2114 new = stb.st_mtime > seconds0; 2115 #endif 2116 if (S_ISDIR(stb.st_mode)) { 2117 DIR *mailbox; 2118 int mailcount = 0; 2119 char *tempfilename; 2120 struct stat stc; 2121 2122 tempfilename = xasprintf("%s/new", filename); 2123 2124 if (stat(tempfilename, &stc) != -1 && S_ISDIR(stc.st_mode)) { 2125 /* 2126 * "filename/new" exists and is a directory; you are 2127 * using Qmail. 2128 */ 2129 stb = stc; 2130 #if defined(BSDTIMES) || defined(_SEQUENT_) 2131 new = stb.st_mtime > time0.tv_sec; 2132 #else 2133 new = stb.st_mtime > seconds0; 2134 #endif 2135 mboxdir = tempfilename; 2136 } 2137 2138 if (stb.st_mtime <= chktim + 1 || (loginsh && !new)) { 2139 xfree(tempfilename); 2140 continue; 2141 } 2142 2143 mailbox = opendir(mboxdir); 2144 xfree(tempfilename); 2145 if (mailbox == NULL) 2146 continue; 2147 2148 /* skip . and .. */ 2149 if (!readdir(mailbox) || !readdir(mailbox)) 2150 continue; 2151 2152 while (readdir(mailbox)) 2153 mailcount++; 2154 2155 if (mailcount == 0) 2156 continue; 2157 2158 if (cnt == 1) 2159 xprintf(CGETS(11, 3, "You have %d mail messages.\n"), 2160 mailcount); 2161 else 2162 xprintf(CGETS(11, 4, "You have %d mail messages in %s.\n"), 2163 mailcount, filename); 2164 } 2165 else { 2166 char *type; 2167 2168 if (stb.st_size == 0 || stb.st_atime > stb.st_mtime || 2169 (stb.st_atime <= chktim && stb.st_mtime <= chktim) || 2170 (loginsh && !new)) 2171 continue; 2172 type = strsave(new ? CGETS(11, 6, "new ") : ""); 2173 cleanup_push(type, xfree); 2174 if (cnt == 1) 2175 xprintf(CGETS(11, 5, "You have %smail.\n"), type); 2176 else 2177 xprintf(CGETS(11, 7, "You have %smail in %s.\n"), type, filename); 2178 cleanup_until(type); 2179 } 2180 } 2181 chktim = t; 2182 } 2183 2184 /* 2185 * Extract a home directory from the password file 2186 * The argument points to a buffer where the name of the 2187 * user whose home directory is sought is currently. 2188 * We return home directory of the user, or NULL. 2189 */ 2190 Char * 2191 gethdir(const Char *home) 2192 { 2193 Char *h; 2194 2195 /* 2196 * Is it us? 2197 */ 2198 if (*home == '\0') { 2199 if ((h = varval(STRhome)) != STRNULL) 2200 return Strsave(h); 2201 else 2202 return NULL; 2203 } 2204 2205 /* 2206 * Look in the cache 2207 */ 2208 if ((h = gettilde(home)) == NULL) 2209 return NULL; 2210 else 2211 return Strsave(h); 2212 } 2213 2214 /* 2215 * Move the initial descriptors to their eventual 2216 * resting places, closing all other units. 2217 */ 2218 void 2219 initdesc(void) 2220 { 2221 #ifdef NLS_BUGS 2222 #ifdef NLS_CATALOGS 2223 nlsclose(); 2224 #endif /* NLS_CATALOGS */ 2225 #endif /* NLS_BUGS */ 2226 2227 2228 didfds = 0; /* 0, 1, 2 aren't set up */ 2229 (void) close_on_exec(SHIN = dcopy(0, FSHIN), 1); 2230 (void) close_on_exec(SHOUT = dcopy(1, FSHOUT), 1); 2231 (void) close_on_exec(SHDIAG = dcopy(2, FSHDIAG), 1); 2232 (void) close_on_exec(OLDSTD = dcopy(SHIN, FOLDSTD), 1); 2233 #ifndef CLOSE_ON_EXEC 2234 didcch = 0; /* Havent closed for child */ 2235 #endif /* CLOSE_ON_EXEC */ 2236 isdiagatty = isatty(SHDIAG); 2237 isoutatty = isatty(SHOUT); 2238 #ifdef NLS_BUGS 2239 #ifdef NLS_CATALOGS 2240 nlsinit(); 2241 #endif /* NLS_CATALOGS */ 2242 #endif /* NLS_BUGS */ 2243 } 2244 2245 2246 void 2247 #ifdef PROF 2248 done(int i) 2249 #else 2250 xexit(int i) 2251 #endif 2252 { 2253 #ifdef TESLA 2254 if (loginsh && do_logout) { 2255 /* this is to send hangup signal to the develcon */ 2256 /* we toggle DTR. clear dtr - sleep 1 - set dtr */ 2257 /* ioctl will return ENOTTY for pty's but we ignore it */ 2258 /* exitstat will run after disconnect */ 2259 /* we sleep for 2 seconds to let things happen in */ 2260 /* .logout and rechist() */ 2261 #ifdef TIOCCDTR 2262 (void) sleep(2); 2263 (void) ioctl(FSHTTY, TIOCCDTR, NULL); 2264 (void) sleep(1); 2265 (void) ioctl(FSHTTY, TIOCSDTR, NULL); 2266 #endif /* TIOCCDTR */ 2267 } 2268 #endif /* TESLA */ 2269 2270 { 2271 struct process *pp, *np; 2272 2273 /* Kill all processes marked for hup'ing */ 2274 for (pp = proclist.p_next; pp; pp = pp->p_next) { 2275 np = pp; 2276 do 2277 if ((np->p_flags & PHUP) && np->p_jobid != shpgrp) { 2278 if (killpg(np->p_jobid, SIGHUP) != -1) { 2279 /* In case the job was suspended... */ 2280 #ifdef SIGCONT 2281 (void) killpg(np->p_jobid, SIGCONT); 2282 #endif 2283 break; 2284 } 2285 } 2286 while ((np = np->p_friends) != pp); 2287 } 2288 } 2289 untty(); 2290 #ifdef NLS_CATALOGS 2291 /* 2292 * We need to call catclose, because SVR4 leaves symlinks behind otherwise 2293 * in the catalog directories. We cannot close on a vforked() child, 2294 * because messages will stop working on the parent too. 2295 */ 2296 if (child == 0) 2297 nlsclose(); 2298 #endif /* NLS_CATALOGS */ 2299 #ifdef WINNT_NATIVE 2300 nt_cleanup(); 2301 #endif /* WINNT_NATIVE */ 2302 _exit(i); 2303 } 2304 2305 #ifndef _PATH_DEFPATH 2306 static Char ** 2307 defaultpath(void) 2308 { 2309 char *ptr; 2310 Char **blk, **blkp; 2311 struct stat stb; 2312 2313 blkp = blk = xmalloc(sizeof(Char *) * 10); 2314 2315 #ifndef NODOT 2316 # ifndef DOTLAST 2317 *blkp++ = Strsave(STRdot); 2318 # endif 2319 #endif 2320 2321 #define DIRAPPEND(a) \ 2322 if (stat(ptr = a, &stb) == 0 && S_ISDIR(stb.st_mode)) \ 2323 *blkp++ = SAVE(ptr) 2324 2325 #ifdef _PATH_LOCAL 2326 DIRAPPEND(_PATH_LOCAL); 2327 #endif 2328 2329 #ifdef _PATH_USRUCB 2330 DIRAPPEND(_PATH_USRUCB); 2331 #endif 2332 2333 #ifdef _PATH_USRBSD 2334 DIRAPPEND(_PATH_USRBSD); 2335 #endif 2336 2337 #ifdef _PATH_BIN 2338 DIRAPPEND(_PATH_BIN); 2339 #endif 2340 2341 #ifdef _PATH_USRBIN 2342 DIRAPPEND(_PATH_USRBIN); 2343 #endif 2344 2345 #undef DIRAPPEND 2346 2347 #ifndef NODOT 2348 # ifdef DOTLAST 2349 *blkp++ = Strsave(STRdot); 2350 # endif 2351 #endif 2352 *blkp = NULL; 2353 return (blk); 2354 } 2355 #endif 2356 2357 static void 2358 record(void) 2359 { 2360 if (!fast) { 2361 recdirs(NULL, adrof(STRsavedirs) != NULL); 2362 rechist(NULL, adrof(STRsavehist) != NULL); 2363 } 2364 } 2365