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 else 659 /* Importpath() allocates memory for the path, and the 660 * returned pointer from SAVE() was discarded, so 661 * this was a memory leak.. (sg) 662 * 663 * importpath(SAVE(tcp)); 664 */ 665 importpath(str2short(tcp)); 666 667 668 { 669 /* If the SHELL environment variable ends with "tcsh", set 670 * STRshell to the same path. This is to facilitate using 671 * the executable in environments where the compiled-in 672 * default isn't appropriate (sg). 673 */ 674 675 size_t sh_len = 0; 676 677 if ((tcp = getenv("SHELL")) != NULL) { 678 sh_len = strlen(tcp); 679 if ((sh_len >= 5 && strcmp(tcp + (sh_len - 5), "/tcsh") == 0) || 680 (!tcsh && sh_len >= 4 && strcmp(tcp + (sh_len - 4), "/csh") == 0)) 681 setv(STRshell, quote(SAVE(tcp)), VAR_READWRITE); 682 else 683 sh_len = 0; 684 } 685 if (sh_len == 0) 686 setcopy(STRshell, STR_SHELLPATH, VAR_READWRITE); 687 } 688 689 #ifdef _OSD_POSIX /* BS2000 needs this variable set to "SHELL" */ 690 if ((tcp = getenv("PROGRAM_ENVIRONMENT")) == NULL) 691 tcp = "SHELL"; 692 tsetenv(STRPROGRAM_ENVIRONMENT, quote(str2short(tcp))); 693 #endif /* _OSD_POSIX */ 694 695 #ifdef COLOR_LS_F 696 if ((tcp = getenv("LS_COLORS")) != NULL) 697 parseLS_COLORS(str2short(tcp)); 698 #endif /* COLOR_LS_F */ 699 700 doldol = putn((int) getpid()); /* For $$ */ 701 #ifdef WINNT_NATIVE 702 { 703 char *tmp; 704 Char *tmp2; 705 if ((tmp = getenv("TMP")) != NULL) { 706 tmp = xasprintf("%s/%s", tmp, "sh"); 707 tmp2 = SAVE(tmp); 708 xfree(tmp); 709 } 710 else { 711 tmp2 = SAVE(""); 712 } 713 shtemp = Strspl(tmp2, doldol); /* For << */ 714 xfree(tmp2); 715 } 716 #else /* !WINNT_NATIVE */ 717 shtemp = Strspl(STRtmpsh, doldol); /* For << */ 718 #endif /* WINNT_NATIVE */ 719 720 /* 721 * Record the interrupt states from the parent process. If the parent is 722 * non-interruptible our hand must be forced or we (and our children) won't 723 * be either. Our children inherit termination from our parent. We catch it 724 * only if we are the login shell. 725 */ 726 sigaction(SIGINT, NULL, &parintr); 727 sigaction(SIGTERM, NULL, &parterm); 728 729 730 #ifdef TCF 731 /* Enable process migration on ourselves and our progeny */ 732 (void) signal(SIGMIGRATE, SIG_DFL); 733 #endif /* TCF */ 734 735 /* 736 * dspkanji/dspmbyte autosetting 737 */ 738 /* PATCH IDEA FROM Issei.Suzuki VERY THANKS */ 739 #if defined(DSPMBYTE) 740 #if defined(NLS) && defined(LC_CTYPE) 741 if (((tcp = setlocale(LC_CTYPE, NULL)) != NULL || (tcp = getenv("LANG")) != NULL) && !adrof(CHECK_MBYTEVAR)) { 742 #else 743 if ((tcp = getenv("LANG")) != NULL && !adrof(CHECK_MBYTEVAR)) { 744 #endif 745 autoset_dspmbyte(str2short(tcp)); 746 } 747 #if defined(WINNT_NATIVE) 748 else if (!adrof(CHECK_MBYTEVAR)) 749 nt_autoset_dspmbyte(); 750 #endif /* WINNT_NATIVE */ 751 #endif 752 753 fix_version(); /* publish the shell version */ 754 755 if (argc > 1 && strcmp(argv[1], "--version") == 0) { 756 xprintf("%S\n", varval(STRversion)); 757 xexit(0); 758 } 759 if (argc > 1 && strcmp(argv[1], "--help") == 0) { 760 xprintf("%S\n\n", varval(STRversion)); 761 xprintf("%s", CGETS(11, 8, HELP_STRING)); 762 xexit(0); 763 } 764 /* 765 * Process the arguments. 766 * 767 * Note that processing of -v/-x is actually delayed till after script 768 * processing. 769 * 770 * We set the first character of our name to be '-' if we are a shell 771 * running interruptible commands. Many programs which examine ps'es 772 * use this to filter such shells out. 773 */ 774 argc--, tempv++; 775 while (argc > 0 && (tcp = tempv[0])[0] == '-' && 776 *++tcp != '\0' && !batch) { 777 do 778 switch (*tcp++) { 779 780 case 0: /* - Interruptible, no prompt */ 781 prompt = 0; 782 setintr = 1; 783 nofile = 1; 784 break; 785 786 case 'b': /* -b Next arg is input file */ 787 batch = 1; 788 break; 789 790 case 'c': /* -c Command input from arg */ 791 if (argc == 1) 792 xexit(0); 793 argc--, tempv++; 794 #ifdef M_XENIX 795 /* Xenix Vi bug: 796 it relies on a 7 bit environment (/bin/sh), so it 797 pass ascii arguments with the 8th bit set */ 798 if (!strcmp(argv[0], "sh")) 799 { 800 char *p; 801 802 for (p = tempv[0]; *p; ++p) 803 *p &= ASCII; 804 } 805 #endif 806 arginp = SAVE(tempv[0]); 807 808 /* 809 * we put the command into a variable 810 */ 811 if (arginp != NULL) 812 setv(STRcommand, quote(Strsave(arginp)), VAR_READWRITE); 813 814 /* 815 * * Give an error on -c arguments that end in * backslash to 816 * ensure that you don't make * nonportable csh scripts. 817 */ 818 { 819 int count; 820 821 cp = Strend(arginp); 822 count = 0; 823 while (cp > arginp && *--cp == '\\') 824 ++count; 825 if ((count & 1) != 0) { 826 exiterr = 1; 827 stderror(ERR_ARGC); 828 } 829 } 830 prompt = 0; 831 nofile = 1; 832 break; 833 case 'd': /* -d Load directory stack from file */ 834 rdirs = 1; 835 break; 836 837 #ifdef apollo 838 case 'D': /* -D Define environment variable */ 839 { 840 Char *dp; 841 842 cp = str2short(tcp); 843 if (dp = Strchr(cp, '=')) { 844 *dp++ = '\0'; 845 tsetenv(cp, dp); 846 } 847 else 848 tsetenv(cp, STRNULL); 849 } 850 *tcp = '\0'; /* done with this argument */ 851 break; 852 #endif /* apollo */ 853 854 case 'e': /* -e Exit on any error */ 855 exiterr = 1; 856 break; 857 858 case 'f': /* -f Fast start */ 859 fast = 1; 860 break; 861 862 case 'i': /* -i Interactive, even if !intty */ 863 intact = 1; 864 nofile = 1; 865 break; 866 867 case 'm': /* -m read .cshrc (from su) */ 868 mflag = 1; 869 break; 870 871 case 'n': /* -n Don't execute */ 872 noexec = 1; 873 break; 874 875 case 'q': /* -q (Undoc'd) ... die on quit */ 876 quitit = 1; 877 break; 878 879 case 's': /* -s Read from std input */ 880 nofile = 1; 881 break; 882 883 case 't': /* -t Read one line from input */ 884 onelflg = 2; 885 prompt = 0; 886 nofile = 1; 887 break; 888 889 case 'v': /* -v Echo hist expanded input */ 890 nverbose = 1; /* ... later */ 891 break; 892 893 case 'x': /* -x Echo just before execution */ 894 nexececho = 1; /* ... later */ 895 break; 896 897 case 'V': /* -V Echo hist expanded input */ 898 setNS(STRverbose); /* NOW! */ 899 break; 900 901 case 'X': /* -X Echo just before execution */ 902 setNS(STRecho); /* NOW! */ 903 break; 904 905 case 'F': 906 /* 907 * This will cause children to be created using fork instead of 908 * vfork. 909 */ 910 use_fork = 1; 911 break; 912 913 case ' ': 914 case '\t': 915 /* 916 * for O/S's that don't do the argument parsing right in 917 * "#!/foo -f " scripts 918 */ 919 break; 920 921 default: /* Unknown command option */ 922 exiterr = 1; 923 stderror(ERR_TCSHUSAGE, tcp-1, progname); 924 break; 925 926 } while (*tcp); 927 tempv++, argc--; 928 } 929 930 if (quitit) /* With all due haste, for debugging */ 931 (void) signal(SIGQUIT, SIG_DFL); 932 933 /* 934 * Unless prevented by -, -c, -i, -s, or -t, if there are remaining 935 * arguments the first of them is the name of a shell file from which to 936 * read commands. 937 */ 938 if (nofile == 0 && argc > 0) { 939 nofile = xopen(tempv[0], O_RDONLY|O_LARGEFILE); 940 if (nofile < 0) { 941 child = 1; /* So this ... */ 942 /* ... doesn't return */ 943 stderror(ERR_SYSTEM, tempv[0], strerror(errno)); 944 } 945 xfree(ffile); 946 dolzero = 1; 947 ffile = SAVE(tempv[0]); 948 /* 949 * Replace FSHIN. Handle /dev/std{in,out,err} specially 950 * since once they are closed we cannot open them again. 951 * In that case we use our own saved descriptors 952 */ 953 if ((SHIN = dmove(nofile, FSHIN)) < 0) 954 switch(nofile) { 955 case 0: 956 SHIN = FSHIN; 957 break; 958 case 1: 959 SHIN = FSHOUT; 960 break; 961 case 2: 962 SHIN = FSHDIAG; 963 break; 964 default: 965 stderror(ERR_SYSTEM, tempv[0], strerror(errno)); 966 break; 967 } 968 (void) close_on_exec(SHIN, 1); 969 prompt = 0; 970 /* argc not used any more */ tempv++; 971 } 972 973 /* 974 * Call to closem() used to be part of initdesc(). Now called below where 975 * the script name argument has become stdin. Kernel may have used a file 976 * descriptor to hold the name of the script (setuid case) and this name 977 * mustn't be lost by closing the fd too soon. 978 */ 979 closem(); 980 981 /* 982 * Consider input a tty if it really is or we are interactive. but not for 983 * editing (christos) 984 */ 985 if (!(intty = isatty(SHIN))) { 986 if (adrof(STRedit)) 987 unsetv(STRedit); 988 editing = 0; 989 } 990 intty |= intact; 991 #ifndef convex 992 if (intty || (intact && isatty(SHOUT))) { 993 if (!batch && (uid != euid || gid != egid)) { 994 errno = EACCES; 995 child = 1; /* So this ... */ 996 /* ... doesn't return */ 997 stderror(ERR_SYSTEM, progname, strerror(errno)); 998 } 999 } 1000 #endif /* convex */ 1001 isoutatty = isatty(SHOUT); 1002 isdiagatty = isatty(SHDIAG); 1003 /* 1004 * Decide whether we should play with signals or not. If we are explicitly 1005 * told (via -i, or -) or we are a login shell (arg0 starts with -) or the 1006 * input and output are both the ttys("csh", or "csh</dev/ttyx>/dev/ttyx") 1007 * Note that in only the login shell is it likely that parent may have set 1008 * signals to be ignored 1009 */ 1010 if (loginsh || intact || (intty && isatty(SHOUT))) 1011 setintr = 1; 1012 settell(); 1013 /* 1014 * Save the remaining arguments in argv. 1015 */ 1016 setq(STRargv, blk2short(tempv), &shvhed, VAR_READWRITE); 1017 1018 /* 1019 * Set up the prompt. 1020 */ 1021 if (prompt) { 1022 if (tcsh) 1023 setcopy(STRprompt, STRdeftcshprompt, VAR_READWRITE); 1024 else 1025 setcopy(STRprompt, STRdefcshprompt, VAR_READWRITE); 1026 /* that's a meta-questionmark */ 1027 setcopy(STRprompt2, STRmquestion, VAR_READWRITE); 1028 setcopy(STRprompt3, STRKCORRECT, VAR_READWRITE); 1029 } 1030 1031 /* 1032 * If we are an interactive shell, then start fiddling with the signals; 1033 * this is a tricky game. 1034 */ 1035 shpgrp = mygetpgrp(); 1036 opgrp = tpgrp = -1; 1037 if (setintr) { 1038 struct sigaction osig; 1039 1040 **argv = '-'; 1041 if (!quitit) /* Wary! */ 1042 (void) signal(SIGQUIT, SIG_IGN); 1043 pintr_disabled = 1; 1044 sigset_interrupting(SIGINT, queue_pintr); 1045 (void) signal(SIGTERM, SIG_IGN); 1046 1047 /* 1048 * No reason I can see not to save history on all these events.. 1049 * Most usual occurrence is in a window system, where we're not a login 1050 * shell, but might as well be... (sg) 1051 * But there might be races when lots of shells exit together... 1052 * [this is also incompatible]. 1053 * We have to be mre careful here. If the parent wants to 1054 * ignore the signals then we leave them untouched... 1055 * We also only setup the handlers for shells that are trully 1056 * interactive. 1057 */ 1058 sigaction(SIGHUP, NULL, &osig); 1059 if (loginsh || osig.sa_handler != SIG_IGN) 1060 /* exit processing on HUP */ 1061 sigset_interrupting(SIGHUP, queue_phup); 1062 #ifdef SIGXCPU 1063 sigaction(SIGXCPU, NULL, &osig); 1064 if (loginsh || osig.sa_handler != SIG_IGN) 1065 /* exit processing on XCPU */ 1066 sigset_interrupting(SIGXCPU, queue_phup); 1067 #endif 1068 #ifdef SIGXFSZ 1069 sigaction(SIGXFSZ, NULL, &osig); 1070 if (loginsh || osig.sa_handler != SIG_IGN) 1071 /* exit processing on XFSZ */ 1072 sigset_interrupting(SIGXFSZ, queue_phup); 1073 #endif 1074 1075 if (quitit == 0 && arginp == 0) { 1076 #ifdef SIGTSTP 1077 (void) signal(SIGTSTP, SIG_IGN); 1078 #endif 1079 #ifdef SIGTTIN 1080 (void) signal(SIGTTIN, SIG_IGN); 1081 #endif 1082 #ifdef SIGTTOU 1083 (void) signal(SIGTTOU, SIG_IGN); 1084 #endif 1085 /* 1086 * Wait till in foreground, in case someone stupidly runs csh & 1087 * dont want to try to grab away the tty. 1088 */ 1089 if (isatty(FSHDIAG)) 1090 f = FSHDIAG; 1091 else if (isatty(FSHOUT)) 1092 f = FSHOUT; 1093 else if (isatty(OLDSTD)) 1094 f = OLDSTD; 1095 else 1096 f = -1; 1097 1098 #ifdef NeXT 1099 /* NeXT 2.0 /usr/etc/rlogind, does not set our process group! */ 1100 if (shpgrp == 0) { 1101 shpgrp = getpid(); 1102 (void) setpgid(0, shpgrp); 1103 (void) tcsetpgrp(f, shpgrp); 1104 } 1105 #endif /* NeXT */ 1106 #ifdef BSDJOBS /* if we have tty job control */ 1107 if (grabpgrp(f, shpgrp) != -1) { 1108 /* 1109 * Thanks to Matt Day for the POSIX references, and to 1110 * Paul Close for the SGI clarification. 1111 */ 1112 if (setdisc(f) != -1) { 1113 opgrp = shpgrp; 1114 shpgrp = getpid(); 1115 tpgrp = shpgrp; 1116 if (tcsetpgrp(f, shpgrp) == -1) { 1117 /* 1118 * On hpux 7.03 this fails with EPERM. This happens on 1119 * the 800 when opgrp != shpgrp at this point. (we were 1120 * forked from a non job control shell) 1121 * POSIX 7.2.4, says we failed because the process 1122 * group specified did not belong to a process 1123 * in the same session with the tty. So we set our 1124 * process group and try again. 1125 */ 1126 if (setpgid(0, shpgrp) == -1) { 1127 xprintf("setpgid:"); 1128 goto notty; 1129 } 1130 if (tcsetpgrp(f, shpgrp) == -1) { 1131 xprintf("tcsetpgrp:"); 1132 goto notty; 1133 } 1134 } 1135 /* 1136 * We check the process group now. If it is the same, then 1137 * we don't need to set it again. On hpux 7.0 on the 300's 1138 * if we set it again it fails with EPERM. This is the 1139 * correct behavior according to POSIX 4.3.3 if the process 1140 * was a session leader . 1141 */ 1142 else if (shpgrp != mygetpgrp()) { 1143 if(setpgid(0, shpgrp) == -1) { 1144 xprintf("setpgid:"); 1145 goto notty; 1146 } 1147 } 1148 #ifdef IRIS4D 1149 /* 1150 * But on irix 3.3 we need to set it again, even if it is 1151 * the same. We do that to tell the system that we 1152 * need BSD process group compatibility. 1153 */ 1154 else 1155 (void) setpgid(0, shpgrp); 1156 #endif 1157 (void) close_on_exec(dcopy(f, FSHTTY), 1); 1158 } 1159 else 1160 tpgrp = -1; 1161 } 1162 if (tpgrp == -1) { 1163 notty: 1164 xprintf(CGETS(11, 1, "Warning: no access to tty (%s).\n"), 1165 strerror(errno)); 1166 xprintf("%s", 1167 CGETS(11, 2, "Thus no job control in this shell.\n")); 1168 /* 1169 * Fix from:Sakari Jalovaara <sja@sirius.hut.fi> if we don't 1170 * have access to tty, disable editing too 1171 */ 1172 if (adrof(STRedit)) 1173 unsetv(STRedit); 1174 editing = 0; 1175 } 1176 #else /* BSDJOBS */ /* don't have job control, so frotz it */ 1177 tpgrp = -1; 1178 #endif /* BSDJOBS */ 1179 } 1180 } 1181 if (setintr == 0 && parintr.sa_handler == SIG_DFL) 1182 setintr = 1; 1183 1184 /* 1185 * SVR4 doesn't send a SIGCHLD when a child is stopped or continued if the 1186 * handler is installed with signal(2) or sigset(2). sigaction(2) must 1187 * be used instead. 1188 * 1189 * David Dawes (dawes@physics.su.oz.au) Sept 1991 1190 */ 1191 sigset_interrupting(SIGCHLD, queue_pchild); 1192 1193 if (intty && !arginp) 1194 (void) ed_Setup(editing);/* Get the tty state, and set defaults */ 1195 /* Only alter the tty state if editing */ 1196 1197 /* 1198 * Set an exit here in case of an interrupt or error reading the shell 1199 * start-up scripts. 1200 */ 1201 osetintr = setintr; 1202 oparintr = parintr; 1203 (void)cleanup_push_mark(); /* There is no outer handler */ 1204 if (setexit() != 0) /* PWP */ 1205 reenter = 1; 1206 else 1207 reenter = 0; 1208 exitset++; 1209 haderr = 0; /* In case second time through */ 1210 if (!fast && reenter == 0) { 1211 /* Will have varval(STRhome) here because set fast if don't */ 1212 { 1213 pintr_disabled++; 1214 cleanup_push(&pintr_disabled, disabled_cleanup); 1215 setintr = 0;/*FIXRESET:cleanup*/ 1216 /* onintr in /etc/ files has no effect */ 1217 parintr.sa_handler = SIG_IGN;/*FIXRESET: cleanup*/ 1218 #ifdef LOGINFIRST 1219 #ifdef _PATH_DOTLOGIN 1220 if (loginsh) 1221 (void) srcfile(_PATH_DOTLOGIN, 0, 0, NULL); 1222 #endif 1223 #endif 1224 1225 #ifdef _PATH_DOTCSHRC 1226 (void) srcfile(_PATH_DOTCSHRC, 0, 0, NULL); 1227 #endif 1228 if (!arginp && !onelflg && !havhash) 1229 dohash(NULL,NULL); 1230 #ifndef LOGINFIRST 1231 #ifdef _PATH_DOTLOGIN 1232 if (loginsh) 1233 (void) srcfile(_PATH_DOTLOGIN, 0, 0, NULL); 1234 #endif 1235 #endif 1236 cleanup_until(&pintr_disabled); 1237 setintr = osetintr; 1238 parintr = oparintr; 1239 } 1240 #ifdef LOGINFIRST 1241 if (loginsh) 1242 (void) srccat(varval(STRhome), STRsldotlogin); 1243 #endif 1244 /* upward compat. */ 1245 if (!srccat(varval(STRhome), STRsldottcshrc)) 1246 (void) srccat(varval(STRhome), STRsldotcshrc); 1247 1248 if (!arginp && !onelflg && !havhash) 1249 dohash(NULL,NULL); 1250 1251 /* 1252 * Source history before .login so that it is available in .login 1253 */ 1254 loadhist(NULL, 0); 1255 #ifndef LOGINFIRST 1256 if (loginsh) 1257 (void) srccat(varval(STRhome), STRsldotlogin); 1258 #endif 1259 if (loginsh || rdirs) 1260 loaddirs(NULL); 1261 } 1262 /* Reset interrupt flag */ 1263 setintr = osetintr; 1264 parintr = oparintr; 1265 exitset--; 1266 1267 /* Initing AFTER .cshrc is the Right Way */ 1268 if (intty && !arginp) { /* PWP setup stuff */ 1269 ed_Init(); /* init the new line editor */ 1270 #ifdef SIG_WINDOW 1271 check_window_size(1); /* mung environment */ 1272 #endif /* SIG_WINDOW */ 1273 } 1274 1275 /* 1276 * Now are ready for the -v and -x flags 1277 */ 1278 if (nverbose) 1279 setNS(STRverbose); 1280 if (nexececho) 1281 setNS(STRecho); 1282 1283 /* 1284 * All the rest of the world is inside this call. The argument to process 1285 * indicates whether it should catch "error unwinds". Thus if we are a 1286 * interactive shell our call here will never return by being blown past on 1287 * an error. 1288 */ 1289 process(setintr); 1290 1291 /* 1292 * Mop-up. 1293 */ 1294 /* Take care of these (especially HUP) here instead of inside flush. */ 1295 handle_pending_signals(); 1296 if (intty) { 1297 if (loginsh) { 1298 xprintf("logout\n"); 1299 xclose(SHIN); 1300 child = 1; 1301 #ifdef TESLA 1302 do_logout = 1; 1303 #endif /* TESLA */ 1304 goodbye(NULL, NULL); 1305 } 1306 else { 1307 xprintf("exit\n"); 1308 } 1309 } 1310 record(); 1311 exitstat(); 1312 return (0); 1313 } 1314 1315 void 1316 untty(void) 1317 { 1318 #ifdef BSDJOBS 1319 if (tpgrp > 0 && opgrp != shpgrp) { 1320 (void) setpgid(0, opgrp); 1321 (void) tcsetpgrp(FSHTTY, opgrp); 1322 (void) resetdisc(FSHTTY); 1323 } 1324 #endif /* BSDJOBS */ 1325 } 1326 1327 void 1328 importpath(Char *cp) 1329 { 1330 size_t i = 0; 1331 Char *dp; 1332 Char **pv; 1333 int c; 1334 1335 for (dp = cp; *dp; dp++) 1336 if (*dp == PATHSEP) 1337 i++; 1338 /* 1339 * i+2 where i is the number of colons in the path. There are i+1 1340 * directories in the path plus we need room for a zero terminator. 1341 */ 1342 pv = xcalloc(i + 2, sizeof(Char *)); 1343 dp = cp; 1344 i = 0; 1345 if (*dp) 1346 for (;;) { 1347 if ((c = *dp) == PATHSEP || c == 0) { 1348 *dp = 0; 1349 pv[i++] = Strsave(*cp ? cp : STRdot); 1350 if (c) { 1351 cp = dp + 1; 1352 *dp = PATHSEP; 1353 } 1354 else 1355 break; 1356 } 1357 #ifdef WINNT_NATIVE 1358 else if (*dp == '\\') 1359 *dp = '/'; 1360 #endif /* WINNT_NATIVE */ 1361 dp++; 1362 } 1363 pv[i] = 0; 1364 cleanup_push(pv, blk_cleanup); 1365 setq(STRpath, pv, &shvhed, VAR_READWRITE); 1366 cleanup_ignore(pv); 1367 cleanup_until(pv); 1368 } 1369 1370 /* 1371 * Source to the file which is the catenation of the argument names. 1372 */ 1373 static int 1374 srccat(Char *cp, Char *dp) 1375 { 1376 if (cp[0] == '/' && cp[1] == '\0') 1377 return srcfile(short2str(dp), (mflag ? 0 : 1), 0, NULL); 1378 else { 1379 Char *ep; 1380 char *ptr; 1381 int rv; 1382 1383 #ifdef WINNT_NATIVE 1384 ep = Strend(cp); 1385 if (ep != cp && ep[-1] == '/' && dp[0] == '/') /* silly win95 */ 1386 dp++; 1387 #endif /* WINNT_NATIVE */ 1388 1389 ep = Strspl(cp, dp); 1390 cleanup_push(ep, xfree); 1391 ptr = short2str(ep); 1392 1393 rv = srcfile(ptr, (mflag ? 0 : 1), 0, NULL); 1394 cleanup_until(ep); 1395 return rv; 1396 } 1397 } 1398 1399 /* 1400 * Source to a file putting the file descriptor in a safe place (> 2). 1401 */ 1402 #ifndef WINNT_NATIVE 1403 static int 1404 #else 1405 int 1406 #endif /*WINNT_NATIVE*/ 1407 srcfile(const char *f, int onlyown, int flag, Char **av) 1408 { 1409 int unit; 1410 1411 if ((unit = xopen(f, O_RDONLY|O_LARGEFILE)) == -1) 1412 return 0; 1413 cleanup_push(&unit, open_cleanup); 1414 unit = dmove(unit, -1); 1415 cleanup_ignore(&unit); 1416 cleanup_until(&unit); 1417 1418 (void) close_on_exec(unit, 1); 1419 srcunit(unit, onlyown, flag, av); 1420 return 1; 1421 } 1422 1423 1424 /* 1425 * Save the shell state, and establish new argument vector, and new input 1426 * fd. 1427 */ 1428 static void 1429 st_save(struct saved_state *st, int unit, int hflg, Char **al, Char **av) 1430 { 1431 st->insource = insource; 1432 st->SHIN = SHIN; 1433 /* Want to preserve the meaning of "source file >output". 1434 * Save old descriptors, move new 0,1,2 to safe places and assign 1435 * them to SH* and let process() redo 0,1,2 from them. 1436 * 1437 * The macro returns true if d1 and d2 are good and they point to 1438 * different things. If you don't avoid saving duplicate 1439 * descriptors, you really limit the depth of "source" recursion 1440 * you can do because of all the open file descriptors. -IAN! 1441 */ 1442 #define NEED_SAVE_FD(d1,d2) \ 1443 (fstat(d1, &s1) != -1 && fstat(d2, &s2) != -1 \ 1444 && (s1.st_ino != s2.st_ino || s1.st_dev != s2.st_dev) ) 1445 1446 st->OLDSTD = st->SHOUT = st->SHDIAG = -1;/* test later to restore these */ 1447 if (didfds) { 1448 struct stat s1, s2; 1449 if (NEED_SAVE_FD(0,OLDSTD)) { 1450 st->OLDSTD = OLDSTD; 1451 OLDSTD = dmove(0, -1); 1452 (void)close_on_exec(OLDSTD, 1); 1453 } 1454 if (NEED_SAVE_FD(1,SHOUT)) { 1455 st->SHOUT = SHOUT; 1456 SHOUT = dmove(1, -1); 1457 (void)close_on_exec(SHOUT, 1); 1458 } 1459 if (NEED_SAVE_FD(2,SHDIAG)) { 1460 st->SHDIAG = SHDIAG; 1461 SHDIAG = dmove(2, -1); 1462 (void)close_on_exec(SHDIAG, 1); 1463 } 1464 donefds(); 1465 } 1466 1467 st->intty = intty; 1468 st->whyles = whyles; 1469 st->gointr = gointr; 1470 st->arginp = arginp; 1471 st->evalp = evalp; 1472 st->evalvec = evalvec; 1473 st->alvecp = alvecp; 1474 st->alvec = alvec; 1475 st->onelflg = onelflg; 1476 st->enterhist = enterhist; 1477 st->justpr = justpr; 1478 if (hflg) 1479 st->HIST = HIST; 1480 else 1481 st->HIST = '\0'; 1482 st->cantell = cantell; 1483 cpybin(st->B, B); 1484 1485 /* 1486 * we can now pass arguments to source. 1487 * For compatibility we do that only if arguments were really 1488 * passed, otherwise we keep the old, global $argv like before. 1489 */ 1490 if (av != NULL && *av != NULL) { 1491 struct varent *vp; 1492 if ((vp = adrof(STRargv)) != NULL && vp->vec != NULL) 1493 st->argv = saveblk(vp->vec); 1494 else 1495 st->argv = NULL; 1496 setq(STRargv, saveblk(av), &shvhed, VAR_READWRITE); 1497 } 1498 else 1499 st->argv = NULL; 1500 st->av = av; 1501 1502 SHIN = unit; /* Do this first */ 1503 1504 /* Establish new input arena */ 1505 { 1506 fbuf = NULL; 1507 fseekp = feobp = fblocks = 0; 1508 settell(); 1509 } 1510 1511 arginp = 0; 1512 onelflg = 0; 1513 intty = isatty(SHIN); 1514 whyles = 0; 1515 gointr = 0; 1516 evalvec = 0; 1517 evalp = 0; 1518 alvec = al; 1519 alvecp = 0; 1520 enterhist = hflg; 1521 if (enterhist) 1522 HIST = '\0'; 1523 insource = 1; 1524 } 1525 1526 1527 /* 1528 * Restore the shell to a saved state 1529 */ 1530 static void 1531 st_restore(void *xst) 1532 { 1533 struct saved_state *st; 1534 1535 st = xst; 1536 if (st->SHIN == -1) 1537 return; 1538 1539 /* Reset input arena */ 1540 { 1541 int i; 1542 Char** nfbuf = fbuf; 1543 int nfblocks = fblocks; 1544 1545 fblocks = 0; 1546 fbuf = NULL; 1547 for (i = 0; i < nfblocks; i++) 1548 xfree(nfbuf[i]); 1549 xfree(nfbuf); 1550 } 1551 cpybin(B, st->B); 1552 1553 xclose(SHIN); 1554 1555 insource = st->insource; 1556 SHIN = st->SHIN; 1557 if (st->OLDSTD != -1) 1558 xclose(OLDSTD), OLDSTD = st->OLDSTD; 1559 if (st->SHOUT != -1) 1560 xclose(SHOUT), SHOUT = st->SHOUT; 1561 if (st->SHDIAG != -1) 1562 xclose(SHDIAG), SHDIAG = st->SHDIAG; 1563 arginp = st->arginp; 1564 onelflg = st->onelflg; 1565 evalp = st->evalp; 1566 evalvec = st->evalvec; 1567 alvecp = st->alvecp; 1568 alvec = st->alvec; 1569 intty = st->intty; 1570 whyles = st->whyles; 1571 gointr = st->gointr; 1572 if (st->HIST != '\0') 1573 HIST = st->HIST; 1574 enterhist = st->enterhist; 1575 cantell = st->cantell; 1576 justpr = st->justpr; 1577 1578 if (st->argv != NULL) 1579 setq(STRargv, st->argv, &shvhed, VAR_READWRITE); 1580 else if (st->av != NULL && *st->av != NULL && adrof(STRargv) != NULL) 1581 unsetv(STRargv); 1582 } 1583 1584 /* 1585 * Source to a unit. If onlyown it must be our file or our group or 1586 * we don't chance it. This occurs on ".cshrc"s and the like. 1587 */ 1588 static void 1589 srcunit(int unit, int onlyown, int hflg, Char **av) 1590 { 1591 struct saved_state st; 1592 1593 st.SHIN = -1; /* st_restore checks this */ 1594 1595 if (unit < 0) 1596 return; 1597 1598 if (onlyown) { 1599 struct stat stb; 1600 1601 if (fstat(unit, &stb) < 0) { 1602 xclose(unit); 1603 return; 1604 } 1605 } 1606 1607 /* Does nothing before st_save() because st.SHIN == -1 */ 1608 cleanup_push(&st, st_restore); 1609 if (setintr) { 1610 pintr_disabled++; 1611 cleanup_push(&pintr_disabled, disabled_cleanup); 1612 } 1613 1614 /* Save the current state and move us to a new state */ 1615 st_save(&st, unit, hflg, NULL, av); 1616 1617 /* 1618 * Now if we are allowing commands to be interrupted, we let ourselves be 1619 * interrupted. 1620 */ 1621 if (setintr) { 1622 cleanup_until(&pintr_disabled); 1623 pintr_disabled++; 1624 cleanup_push(&pintr_disabled, disabled_cleanup); 1625 } 1626 1627 process(0); /* 0 -> blow away on errors */ 1628 1629 /* Restore the old state */ 1630 cleanup_until(&st); 1631 } 1632 1633 1634 /*ARGSUSED*/ 1635 void 1636 goodbye(Char **v, struct command *c) 1637 { 1638 USE(v); 1639 USE(c); 1640 record(); 1641 1642 if (loginsh) { 1643 size_t omark; 1644 sigset_t set; 1645 1646 sigemptyset(&set); 1647 signal(SIGQUIT, SIG_IGN); 1648 sigaddset(&set, SIGQUIT); 1649 sigprocmask(SIG_UNBLOCK, &set, NULL); 1650 signal(SIGINT, SIG_IGN); 1651 sigaddset(&set, SIGINT); 1652 signal(SIGTERM, SIG_IGN); 1653 sigaddset(&set, SIGTERM); 1654 signal(SIGHUP, SIG_IGN); 1655 sigaddset(&set, SIGHUP); 1656 sigprocmask(SIG_UNBLOCK, &set, NULL); 1657 phup_disabled = 1; 1658 setintr = 0; /* No interrupts after "logout" */ 1659 /* Trap errors inside .logout */ 1660 omark = cleanup_push_mark(); 1661 if (setexit() == 0) { 1662 if (!(adrof(STRlogout))) 1663 setcopy(STRlogout, STRnormal, VAR_READWRITE); 1664 #ifdef _PATH_DOTLOGOUT 1665 (void) srcfile(_PATH_DOTLOGOUT, 0, 0, NULL); 1666 #endif 1667 if (adrof(STRhome)) 1668 (void) srccat(varval(STRhome), STRsldtlogout); 1669 #ifdef TESLA 1670 do_logout = 1; 1671 #endif /* TESLA */ 1672 } 1673 cleanup_pop_mark(omark); 1674 } 1675 exitstat(); 1676 } 1677 1678 void 1679 exitstat(void) 1680 { 1681 #ifdef PROF 1682 monitor(0); 1683 #endif 1684 /* 1685 * Note that if STATUS is corrupted (i.e. getn bombs) then error will exit 1686 * directly because we poke child here. Otherwise we might continue 1687 * unwarrantedly (sic). 1688 */ 1689 child = 1; 1690 1691 xexit(getn(varval(STRstatus))); 1692 } 1693 1694 /* 1695 * in the event of a HUP we want to save the history 1696 */ 1697 void 1698 phup(void) 1699 { 1700 if (loginsh) { 1701 setcopy(STRlogout, STRhangup, VAR_READWRITE); 1702 #ifdef _PATH_DOTLOGOUT 1703 (void) srcfile(_PATH_DOTLOGOUT, 0, 0, NULL); 1704 #endif 1705 if (adrof(STRhome)) 1706 (void) srccat(varval(STRhome), STRsldtlogout); 1707 } 1708 1709 record(); 1710 1711 #ifdef POSIXJOBS 1712 /* 1713 * We kill the last foreground process group. It then becomes 1714 * responsible to propagate the SIGHUP to its progeny. 1715 */ 1716 { 1717 struct process *pp, *np; 1718 1719 for (pp = proclist.p_next; pp; pp = pp->p_next) { 1720 np = pp; 1721 /* 1722 * Find if this job is in the foreground. It could be that 1723 * the process leader has exited and the foreground flag 1724 * is cleared for it. 1725 */ 1726 do 1727 /* 1728 * If a process is in the foreground we try to kill 1729 * it's process group. If we succeed, then the 1730 * whole job is gone. Otherwise we keep going... 1731 * But avoid sending HUP to the shell again. 1732 */ 1733 if (((np->p_flags & PFOREGND) != 0) && np->p_jobid != shpgrp) { 1734 np->p_flags &= ~PHUP; 1735 if (killpg(np->p_jobid, SIGHUP) != -1) { 1736 /* In case the job was suspended... */ 1737 #ifdef SIGCONT 1738 (void) killpg(np->p_jobid, SIGCONT); 1739 #endif 1740 break; 1741 } 1742 } 1743 while ((np = np->p_friends) != pp); 1744 } 1745 } 1746 #endif /* POSIXJOBS */ 1747 1748 xexit(SIGHUP); 1749 } 1750 1751 static Char *jobargv[2] = {STRjobs, 0}; 1752 1753 /* 1754 * Catch an interrupt, e.g. during lexical input. 1755 * If we are an interactive shell, we reset the interrupt catch 1756 * immediately. In any case we drain the shell output, 1757 * and finally go through the normal error mechanism, which 1758 * gets a chance to make the shell go away. 1759 */ 1760 int just_signaled; /* bugfix by Michael Bloom (mg@ttidca.TTI.COM) */ 1761 1762 void 1763 pintr(void) 1764 { 1765 just_signaled = 1; 1766 pintr1(1); 1767 } 1768 1769 void 1770 pintr1(int wantnl) 1771 { 1772 if (setintr) { 1773 if (pjobs) { 1774 pjobs = 0; 1775 xputchar('\n'); 1776 dojobs(jobargv, NULL); 1777 stderror(ERR_NAME | ERR_INTR); 1778 } 1779 } 1780 /* MH - handle interrupted completions specially */ 1781 { 1782 if (InsideCompletion) 1783 stderror(ERR_SILENT); 1784 } 1785 /* JV - Make sure we shut off inputl */ 1786 { 1787 (void) Cookedmode(); 1788 GettingInput = 0; 1789 } 1790 drainoline(); 1791 #ifdef HAVE_GETPWENT 1792 (void) endpwent(); 1793 #endif 1794 1795 /* 1796 * If we have an active "onintr" then we search for the label. Note that if 1797 * one does "onintr -" then we shan't be interruptible so we needn't worry 1798 * about that here. 1799 */ 1800 if (gointr) { 1801 gotolab(gointr); 1802 reset(); 1803 } 1804 else if (intty && wantnl) { 1805 if (editing) { 1806 /* 1807 * If we are editing a multi-line input command, and move to 1808 * the beginning of the line, we don't want to trash it when 1809 * we hit ^C 1810 */ 1811 PastBottom(); 1812 ClearLines(); 1813 ClearDisp(); 1814 } 1815 else { 1816 /* xputchar('\n'); *//* Some like this, others don't */ 1817 (void) putraw('\r'); 1818 (void) putraw('\n'); 1819 } 1820 } 1821 stderror(ERR_SILENT); 1822 } 1823 1824 /* 1825 * Process is the main driving routine for the shell. 1826 * It runs all command processing, except for those within { ... } 1827 * in expressions (which is run by a routine evalav in sh.exp.c which 1828 * is a stripped down process), and `...` evaluation which is run 1829 * also by a subset of this code in sh.glob.c in the routine backeval. 1830 * 1831 * The code here is a little strange because part of it is interruptible 1832 * and hence freeing of structures appears to occur when none is necessary 1833 * if this is ignored. 1834 * 1835 * Note that if catch is not set then we will unwind on any error. 1836 * If an end-of-file occurs, we return. 1837 */ 1838 void 1839 process(int catch) 1840 { 1841 jmp_buf_t osetexit; 1842 /* PWP: This might get nuked my longjmp so don't make it a register var */ 1843 size_t omark; 1844 volatile int didexitset = 0; 1845 1846 getexit(osetexit); 1847 omark = cleanup_push_mark(); 1848 for (;;) { 1849 struct command *t; 1850 int hadhist, old_pintr_disabled; 1851 1852 (void)setexit(); 1853 if (didexitset == 0) { 1854 exitset++; 1855 didexitset++; 1856 } 1857 pendjob(); 1858 1859 justpr = enterhist; /* execute if not entering history */ 1860 1861 if (haderr) { 1862 if (!catch) { 1863 /* unwind */ 1864 doneinp = 0; 1865 cleanup_pop_mark(omark); 1866 resexit(osetexit); 1867 reset(); 1868 } 1869 haderr = 0; 1870 /* 1871 * Every error is eventually caught here or the shell dies. It is 1872 * at this point that we clean up any left-over open files, by 1873 * closing all but a fixed number of pre-defined files. Thus 1874 * routines don't have to worry about leaving files open due to 1875 * deeper errors... they will get closed here. 1876 */ 1877 closem(); 1878 continue; 1879 } 1880 if (doneinp) { 1881 doneinp = 0; 1882 break; 1883 } 1884 if (chkstop) 1885 chkstop--; 1886 if (neednote) 1887 pnote(); 1888 if (intty && prompt && evalvec == 0) { 1889 just_signaled = 0; 1890 mailchk(); 1891 /* 1892 * Watch for logins/logouts. Next is scheduled commands stored 1893 * previously using "sched." Then execute periodic commands. 1894 * Following that, the prompt precmd is run. 1895 */ 1896 #ifndef HAVENOUTMP 1897 watch_login(0); 1898 #endif /* !HAVENOUTMP */ 1899 sched_run(); 1900 period_cmd(); 1901 precmd(); 1902 /* 1903 * If we are at the end of the input buffer then we are going to 1904 * read fresh stuff. Otherwise, we are rereading input and don't 1905 * need or want to prompt. 1906 */ 1907 if (fseekp == feobp && aret == TCSH_F_SEEK) 1908 printprompt(0, NULL); 1909 flush(); 1910 setalarm(1); 1911 } 1912 if (seterr) { 1913 xfree(seterr); 1914 seterr = NULL; 1915 } 1916 1917 /* 1918 * Interruptible during interactive reads 1919 */ 1920 if (setintr) 1921 pintr_push_enable(&old_pintr_disabled); 1922 hadhist = lex(¶ml); 1923 if (setintr) 1924 cleanup_until(&old_pintr_disabled); 1925 cleanup_push(¶ml, lex_cleanup); 1926 1927 /* 1928 * Echo not only on VERBOSE, but also with history expansion. If there 1929 * is a lexical error then we forego history echo. 1930 */ 1931 if ((hadhist && !seterr && intty && !tellwhat && !Expand && !whyles) || 1932 adrof(STRverbose)) { 1933 int odidfds = didfds; 1934 haderr = 1; 1935 didfds = 0; 1936 prlex(¶ml); 1937 flush(); 1938 haderr = 0; 1939 didfds = odidfds; 1940 } 1941 (void) alarm(0); /* Autologout OFF */ 1942 alrmcatch_disabled = 1; 1943 1944 /* 1945 * Save input text on the history list if reading in old history, or it 1946 * is from the terminal at the top level and not in a loop. 1947 * 1948 * PWP: entry of items in the history list while in a while loop is done 1949 * elsewhere... 1950 */ 1951 if (enterhist || (catch && intty && !whyles && !tellwhat && !arun)) 1952 savehist(¶ml, enterhist > 1); 1953 1954 if (Expand && seterr) 1955 Expand = 0; 1956 1957 /* 1958 * Print lexical error messages, except when sourcing history lists. 1959 */ 1960 if (!enterhist && seterr) 1961 stderror(ERR_OLD); 1962 1963 /* 1964 * If had a history command :p modifier then this is as far as we 1965 * should go 1966 */ 1967 if (justpr) 1968 goto cmd_done; 1969 1970 /* 1971 * If had a tellwhat from twenex() then do 1972 */ 1973 if (tellwhat) { 1974 (void) tellmewhat(¶ml, NULL); 1975 goto cmd_done; 1976 } 1977 1978 alias(¶ml); 1979 1980 #ifdef BSDJOBS 1981 /* 1982 * If we are interactive, try to continue jobs that we have stopped 1983 */ 1984 if (prompt) 1985 continue_jobs(¶ml); 1986 #endif /* BSDJOBS */ 1987 1988 /* 1989 * Check to see if the user typed "rm * .o" or something 1990 */ 1991 if (prompt) 1992 rmstar(¶ml); 1993 /* 1994 * Parse the words of the input into a parse tree. 1995 */ 1996 t = syntax(paraml.next, ¶ml, 0); 1997 cleanup_push(t, syntax_cleanup); 1998 if (seterr) 1999 stderror(ERR_OLD); 2000 2001 postcmd(); 2002 /* 2003 * Execute the parse tree From: Michael Schroeder 2004 * <mlschroe@immd4.informatik.uni-erlangen.de> was execute(t, tpgrp); 2005 */ 2006 execute(t, (tpgrp > 0 ? tpgrp : -1), NULL, NULL, TRUE); 2007 2008 /* 2009 * Made it! 2010 */ 2011 #ifdef SIG_WINDOW 2012 if (windowchg || (catch && intty && !whyles && !tellwhat)) { 2013 (void) check_window_size(0); /* for window systems */ 2014 } 2015 #endif /* SIG_WINDOW */ 2016 setcopy(STR_, InputBuf, VAR_READWRITE | VAR_NOGLOB); 2017 cmd_done: 2018 cleanup_until(¶ml); 2019 } 2020 cleanup_pop_mark(omark); 2021 resexit(osetexit); 2022 exitset--; 2023 } 2024 2025 /*ARGSUSED*/ 2026 void 2027 dosource(Char **t, struct command *c) 2028 { 2029 Char *f; 2030 int hflg = 0; 2031 char *file; 2032 2033 USE(c); 2034 t++; 2035 if (*t && eq(*t, STRmh)) { 2036 if (*++t == NULL) 2037 stderror(ERR_NAME | ERR_HFLAG); 2038 hflg++; 2039 } 2040 else if (*t && eq(*t, STRmm)) { 2041 if (*++t == NULL) 2042 stderror(ERR_NAME | ERR_MFLAG); 2043 hflg = 2; 2044 } 2045 2046 f = globone(*t++, G_ERROR); 2047 file = strsave(short2str(f)); 2048 cleanup_push(file, xfree); 2049 xfree(f); 2050 t = glob_all_or_error(t); 2051 if ((!srcfile(file, 0, hflg, t)) && (!hflg) && (!bequiet)) 2052 stderror(ERR_SYSTEM, file, strerror(errno)); 2053 cleanup_until(file); 2054 } 2055 2056 /* 2057 * Check for mail. 2058 * If we are a login shell, then we don't want to tell 2059 * about any mail file unless its been modified 2060 * after the time we started. 2061 * This prevents us from telling the user things he already 2062 * knows, since the login program insists on saying 2063 * "You have mail." 2064 */ 2065 2066 /* 2067 * The AMS version. 2068 * This version checks if the file is a directory, and if so, 2069 * tells you the number of files in it, otherwise do the old thang. 2070 * The magic "+1" in the time calculation is to compensate for 2071 * an AFS bug where directory mtimes are set to 1 second in 2072 * the future. 2073 */ 2074 2075 static void 2076 mailchk(void) 2077 { 2078 struct varent *v; 2079 Char **vp; 2080 time_t t; 2081 int intvl, cnt; 2082 struct stat stb; 2083 int new; 2084 2085 v = adrof(STRmail); 2086 if (v == NULL || v->vec == NULL) 2087 return; 2088 (void) time(&t); 2089 vp = v->vec; 2090 cnt = blklen(vp); 2091 intvl = (cnt && number(*vp)) ? (--cnt, getn(*vp++)) : MAILINTVL; 2092 if (intvl < 1) 2093 intvl = 1; 2094 if (chktim + intvl > t) 2095 return; 2096 for (; *vp; vp++) { 2097 char *filename = short2str(*vp); 2098 char *mboxdir = filename; 2099 2100 if (stat(filename, &stb) < 0) 2101 continue; 2102 #if defined(BSDTIMES) || defined(_SEQUENT_) 2103 new = stb.st_mtime > time0.tv_sec; 2104 #else 2105 new = stb.st_mtime > seconds0; 2106 #endif 2107 if (S_ISDIR(stb.st_mode)) { 2108 DIR *mailbox; 2109 int mailcount = 0; 2110 char *tempfilename; 2111 struct stat stc; 2112 2113 tempfilename = xasprintf("%s/new", filename); 2114 2115 if (stat(tempfilename, &stc) != -1 && S_ISDIR(stc.st_mode)) { 2116 /* 2117 * "filename/new" exists and is a directory; you are 2118 * using Qmail. 2119 */ 2120 stb = stc; 2121 #if defined(BSDTIMES) || defined(_SEQUENT_) 2122 new = stb.st_mtime > time0.tv_sec; 2123 #else 2124 new = stb.st_mtime > seconds0; 2125 #endif 2126 mboxdir = tempfilename; 2127 } 2128 2129 if (stb.st_mtime <= chktim + 1 || (loginsh && !new)) { 2130 xfree(tempfilename); 2131 continue; 2132 } 2133 2134 mailbox = opendir(mboxdir); 2135 xfree(tempfilename); 2136 if (mailbox == NULL) 2137 continue; 2138 2139 /* skip . and .. */ 2140 if (!readdir(mailbox) || !readdir(mailbox)) 2141 continue; 2142 2143 while (readdir(mailbox)) 2144 mailcount++; 2145 2146 if (mailcount == 0) 2147 continue; 2148 2149 if (cnt == 1) 2150 xprintf(CGETS(11, 3, "You have %d mail messages.\n"), 2151 mailcount); 2152 else 2153 xprintf(CGETS(11, 4, "You have %d mail messages in %s.\n"), 2154 mailcount, filename); 2155 } 2156 else { 2157 char *type; 2158 2159 if (stb.st_size == 0 || stb.st_atime > stb.st_mtime || 2160 (stb.st_atime <= chktim && stb.st_mtime <= chktim) || 2161 (loginsh && !new)) 2162 continue; 2163 type = strsave(new ? CGETS(11, 6, "new ") : ""); 2164 cleanup_push(type, xfree); 2165 if (cnt == 1) 2166 xprintf(CGETS(11, 5, "You have %smail.\n"), type); 2167 else 2168 xprintf(CGETS(11, 7, "You have %smail in %s.\n"), type, filename); 2169 cleanup_until(type); 2170 } 2171 } 2172 chktim = t; 2173 } 2174 2175 /* 2176 * Extract a home directory from the password file 2177 * The argument points to a buffer where the name of the 2178 * user whose home directory is sought is currently. 2179 * We return home directory of the user, or NULL. 2180 */ 2181 Char * 2182 gethdir(const Char *home) 2183 { 2184 Char *h; 2185 2186 /* 2187 * Is it us? 2188 */ 2189 if (*home == '\0') { 2190 if ((h = varval(STRhome)) != STRNULL) 2191 return Strsave(h); 2192 else 2193 return NULL; 2194 } 2195 2196 /* 2197 * Look in the cache 2198 */ 2199 if ((h = gettilde(home)) == NULL) 2200 return NULL; 2201 else 2202 return Strsave(h); 2203 } 2204 2205 /* 2206 * Move the initial descriptors to their eventual 2207 * resting places, closing all other units. 2208 */ 2209 void 2210 initdesc(void) 2211 { 2212 #ifdef NLS_BUGS 2213 #ifdef NLS_CATALOGS 2214 nlsclose(); 2215 #endif /* NLS_CATALOGS */ 2216 #endif /* NLS_BUGS */ 2217 2218 2219 didfds = 0; /* 0, 1, 2 aren't set up */ 2220 (void) close_on_exec(SHIN = dcopy(0, FSHIN), 1); 2221 (void) close_on_exec(SHOUT = dcopy(1, FSHOUT), 1); 2222 (void) close_on_exec(SHDIAG = dcopy(2, FSHDIAG), 1); 2223 (void) close_on_exec(OLDSTD = dcopy(SHIN, FOLDSTD), 1); 2224 #ifndef CLOSE_ON_EXEC 2225 didcch = 0; /* Havent closed for child */ 2226 #endif /* CLOSE_ON_EXEC */ 2227 isdiagatty = isatty(SHDIAG); 2228 isoutatty = isatty(SHOUT); 2229 #ifdef NLS_BUGS 2230 #ifdef NLS_CATALOGS 2231 nlsinit(); 2232 #endif /* NLS_CATALOGS */ 2233 #endif /* NLS_BUGS */ 2234 } 2235 2236 2237 void 2238 #ifdef PROF 2239 done(int i) 2240 #else 2241 xexit(int i) 2242 #endif 2243 { 2244 #ifdef TESLA 2245 if (loginsh && do_logout) { 2246 /* this is to send hangup signal to the develcon */ 2247 /* we toggle DTR. clear dtr - sleep 1 - set dtr */ 2248 /* ioctl will return ENOTTY for pty's but we ignore it */ 2249 /* exitstat will run after disconnect */ 2250 /* we sleep for 2 seconds to let things happen in */ 2251 /* .logout and rechist() */ 2252 #ifdef TIOCCDTR 2253 (void) sleep(2); 2254 (void) ioctl(FSHTTY, TIOCCDTR, NULL); 2255 (void) sleep(1); 2256 (void) ioctl(FSHTTY, TIOCSDTR, NULL); 2257 #endif /* TIOCCDTR */ 2258 } 2259 #endif /* TESLA */ 2260 2261 { 2262 struct process *pp, *np; 2263 2264 /* Kill all processes marked for hup'ing */ 2265 for (pp = proclist.p_next; pp; pp = pp->p_next) { 2266 np = pp; 2267 do 2268 if ((np->p_flags & PHUP) && np->p_jobid != shpgrp) { 2269 if (killpg(np->p_jobid, SIGHUP) != -1) { 2270 /* In case the job was suspended... */ 2271 #ifdef SIGCONT 2272 (void) killpg(np->p_jobid, SIGCONT); 2273 #endif 2274 break; 2275 } 2276 } 2277 while ((np = np->p_friends) != pp); 2278 } 2279 } 2280 untty(); 2281 #ifdef NLS_CATALOGS 2282 /* 2283 * We need to call catclose, because SVR4 leaves symlinks behind otherwise 2284 * in the catalog directories. We cannot close on a vforked() child, 2285 * because messages will stop working on the parent too. 2286 */ 2287 if (child == 0) 2288 nlsclose(); 2289 #endif /* NLS_CATALOGS */ 2290 #ifdef WINNT_NATIVE 2291 nt_cleanup(); 2292 #endif /* WINNT_NATIVE */ 2293 _exit(i); 2294 } 2295 2296 #ifndef _PATH_DEFPATH 2297 static Char ** 2298 defaultpath(void) 2299 { 2300 char *ptr; 2301 Char **blk, **blkp; 2302 struct stat stb; 2303 2304 blkp = blk = xmalloc(sizeof(Char *) * 10); 2305 2306 #ifndef NODOT 2307 # ifndef DOTLAST 2308 *blkp++ = Strsave(STRdot); 2309 # endif 2310 #endif 2311 2312 #define DIRAPPEND(a) \ 2313 if (stat(ptr = a, &stb) == 0 && S_ISDIR(stb.st_mode)) \ 2314 *blkp++ = SAVE(ptr) 2315 2316 #ifdef _PATH_LOCAL 2317 DIRAPPEND(_PATH_LOCAL); 2318 #endif 2319 2320 #ifdef _PATH_USRUCB 2321 DIRAPPEND(_PATH_USRUCB); 2322 #endif 2323 2324 #ifdef _PATH_USRBSD 2325 DIRAPPEND(_PATH_USRBSD); 2326 #endif 2327 2328 #ifdef _PATH_BIN 2329 DIRAPPEND(_PATH_BIN); 2330 #endif 2331 2332 #ifdef _PATH_USRBIN 2333 DIRAPPEND(_PATH_USRBIN); 2334 #endif 2335 2336 #undef DIRAPPEND 2337 2338 #ifndef NODOT 2339 # ifdef DOTLAST 2340 *blkp++ = Strsave(STRdot); 2341 # endif 2342 #endif 2343 *blkp = NULL; 2344 return (blk); 2345 } 2346 #endif 2347 2348 static void 2349 record(void) 2350 { 2351 if (!fast) { 2352 recdirs(NULL, adrof(STRsavedirs) != NULL); 2353 rechist(NULL, adrof(STRsavehist) != NULL); 2354 } 2355 } 2356 2357 /* 2358 * Grab the tty repeatedly, and give up if we are not in the correct 2359 * tty process group. 2360 */ 2361 int 2362 grabpgrp(int fd, pid_t desired) 2363 { 2364 struct sigaction old; 2365 pid_t pgrp; 2366 size_t i; 2367 2368 for (i = 0; i < 100; i++) { 2369 if ((pgrp = tcgetpgrp(fd)) == -1) 2370 return -1; 2371 if (pgrp == desired) 2372 return 0; 2373 (void)sigaction(SIGTTIN, NULL, &old); 2374 (void)signal(SIGTTIN, SIG_DFL); 2375 (void)kill(0, SIGTTIN); 2376 (void)sigaction(SIGTTIN, &old, NULL); 2377 } 2378 errno = EPERM; 2379 return -1; 2380 } 2381