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