1 /* 2 * sh.c: Main shell routines 3 */ 4 /*- 5 * Copyright (c) 1980, 1991 The Regents of the University of California. 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. Neither the name of the University nor the names of its contributors 17 * may be used to endorse or promote products derived from this software 18 * without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30 * SUCH DAMAGE. 31 */ 32 #define EXTERN /* Intern */ 33 #include "sh.h" 34 35 #ifndef lint 36 char copyright[] = 37 "@(#) Copyright (c) 1991 The Regents of the University of California.\n\ 38 All rights reserved.\n"; 39 #endif /* not lint */ 40 41 #include "tc.h" 42 #include "ed.h" 43 #include "tw.h" 44 45 extern int MapsAreInited; 46 extern int NLSMapsAreInited; 47 48 /* 49 * C Shell 50 * 51 * Bill Joy, UC Berkeley, California, USA 52 * October 1978, May 1980 53 * 54 * Jim Kulp, IIASA, Laxenburg, Austria 55 * April 1980 56 * 57 * Filename recognition added: 58 * Ken Greer, Ind. Consultant, Palo Alto CA 59 * October 1983. 60 * 61 * Karl Kleinpaste, Computer Consoles, Inc. 62 * Added precmd, periodic/tperiod, prompt changes, 63 * directory stack hack, and login watch. 64 * Sometime March 1983 - Feb 1984. 65 * 66 * Added scheduled commands, including the "sched" command, 67 * plus the call to sched_run near the precmd et al 68 * routines. 69 * Upgraded scheduled events for running events while 70 * sitting idle at command input. 71 * 72 * Paul Placeway, Ohio State 73 * added stuff for running with twenex/inputl 9 Oct 1984. 74 * 75 * ported to Apple Unix (TM) (OREO) 26 -- 29 Jun 1987 76 */ 77 78 jmp_buf_t reslab IZERO_STRUCT; 79 struct wordent paraml IZERO_STRUCT; 80 81 static const char tcshstr[] = "tcsh"; 82 83 struct sigaction parintr; /* Parents interrupt catch */ 84 struct sigaction parterm; /* Parents terminate catch */ 85 86 #ifdef TESLA 87 int do_logout = 0; 88 #endif /* TESLA */ 89 90 91 int use_fork = 0; /* use fork() instead of vfork()? */ 92 93 /* 94 * Magic pointer values. Used to specify other invalid conditions aside 95 * from null. 96 */ 97 static Char INVCHAR; 98 Char *INVPTR = &INVCHAR; 99 Char **INVPPTR = &INVPTR; 100 101 static int fast = 0; 102 static int mflag = 0; 103 static int prompt = 1; 104 int enterhist = 0; 105 int tellwhat = 0; 106 time_t t_period; 107 Char *ffile = NULL; 108 int dolzero = 0; 109 int insource = 0; 110 int exitset = 0; 111 static time_t chktim; /* Time mail last checked */ 112 char *progname; 113 int tcsh; 114 115 /* 116 * This preserves the input state of the shell. It is used by 117 * st_save and st_restore to manupulate shell state. 118 */ 119 struct saved_state { 120 int insource; 121 int OLDSTD; 122 int SHIN; 123 int SHOUT; 124 int SHDIAG; 125 int intty; 126 struct whyle *whyles; 127 Char *gointr; 128 Char *arginp; 129 Char *evalp; 130 Char **evalvec; 131 Char *alvecp; 132 Char **alvec; 133 int onelflg; 134 int enterhist; 135 Char **argv; 136 Char **av; 137 Char HIST; 138 int cantell; 139 struct Bin B; 140 int justpr; 141 }; 142 143 static int srccat (Char *, Char *); 144 #ifndef WINNT_NATIVE 145 static int srcfile (const char *, int, int, Char **); 146 #else 147 int srcfile (const char *, int, int, Char **); 148 #endif /*WINNT_NATIVE*/ 149 static void srcunit (int, int, int, Char **); 150 static void mailchk (void); 151 #ifndef _PATH_DEFPATH 152 static Char **defaultpath (void); 153 #endif 154 static void record (void); 155 static void st_save (struct saved_state *, int, int, 156 Char **, Char **); 157 static void st_restore (void *); 158 159 int main (int, char **); 160 161 #ifndef LOCALEDIR 162 #define LOCALEDIR "/usr/share/locale" 163 #endif 164 165 #ifdef NLS_CATALOGS 166 static void 167 add_localedir_to_nlspath(const char *path) 168 { 169 static const char msgs_LOC[] = "/%L/LC_MESSAGES/%N.cat"; 170 static const char msgs_lang[] = "/%l/LC_MESSAGES/%N.cat"; 171 char *old; 172 char *new, *new_p; 173 size_t len; 174 int add_LOC = 1; 175 int add_lang = 1; 176 char trypath[MAXPATHLEN]; 177 struct stat st; 178 179 if (path == NULL) 180 return; 181 182 (void) xsnprintf(trypath, sizeof(trypath), "%s/C/LC_MESSAGES/tcsh.cat", 183 path); 184 if (stat(trypath, &st) == -1) 185 return; 186 187 if ((old = getenv("NLSPATH")) != NULL) 188 len = strlen(old) + 1; /* don't forget the colon. */ 189 else 190 len = 0; 191 192 len += 2 * strlen(path) + 193 sizeof(msgs_LOC) + sizeof(msgs_lang); /* includes the extra colon */ 194 195 new = new_p = xcalloc(len, 1); 196 197 if (old != NULL) { 198 size_t pathlen = strlen(path); 199 char *old_p; 200 201 (void) xsnprintf(new_p, len, "%s", old); 202 new_p += strlen(new_p); 203 len -= new_p - new; 204 205 /* Check if the paths we try to add are already present in NLSPATH. 206 If so, note it by setting the appropriate flag to 0. */ 207 for (old_p = old; old_p; old_p = strchr(old_p, ':'), 208 old_p = old_p ? old_p + 1 : NULL) { 209 if (strncmp(old_p, path, pathlen) != 0) 210 continue; 211 if (strncmp(old_p + pathlen, msgs_LOC, sizeof(msgs_LOC) - 1) == 0) 212 add_LOC = 0; 213 else if (strncmp(old_p + pathlen, msgs_lang, 214 sizeof(msgs_lang) - 1) == 0) 215 add_lang = 0; 216 } 217 } 218 219 /* Add the message catalog paths not already present to NLSPATH. */ 220 if (add_LOC || add_lang) 221 (void) xsnprintf(new_p, len, "%s%s%s%s%s%s", 222 old ? ":" : "", 223 add_LOC ? path : "", add_LOC ? msgs_LOC : "", 224 add_LOC && add_lang ? ":" : "", 225 add_lang ? path : "", add_lang ? msgs_lang : ""); 226 227 tsetenv(STRNLSPATH, str2short(new)); 228 free(new); 229 } 230 #endif 231 232 int 233 main(int argc, char **argv) 234 { 235 int batch = 0; 236 volatile int nexececho = 0; 237 int nofile = 0; 238 volatile int nverbose = 0; 239 volatile int rdirs = 0; 240 volatile int exitcode = 0; 241 int quitit = 0; 242 Char *cp; 243 #ifdef AUTOLOGOUT 244 Char *cp2; 245 #endif 246 char *tcp, *ttyn; 247 int f, reenter; 248 char **tempv; 249 static const char *targinp = NULL; 250 int osetintr; 251 struct sigaction oparintr; 252 253 #ifdef WINNT_NATIVE 254 nt_init(); 255 #endif /* WINNT_NATIVE */ 256 257 (void)memset(&reslab, 0, sizeof(reslab)); 258 #if defined(NLS_CATALOGS) && defined(LC_MESSAGES) 259 (void) setlocale(LC_MESSAGES, ""); 260 #endif /* NLS_CATALOGS && LC_MESSAGES */ 261 262 #ifdef NLS 263 # ifdef LC_CTYPE 264 (void) setlocale(LC_CTYPE, ""); /* for iscntrl */ 265 # endif /* LC_CTYPE */ 266 #endif /* NLS */ 267 268 STR_environ = blk2short(environ); 269 environ = short2blk(STR_environ); /* So that we can free it */ 270 271 #ifdef NLS_CATALOGS 272 add_localedir_to_nlspath(LOCALEDIR); 273 #endif 274 275 nlsinit(); 276 initlex(¶ml); 277 278 #ifdef MALLOC_TRACE 279 mal_setstatsfile(fdopen(dmove(xopen("/tmp/tcsh.trace", 280 O_WRONLY|O_CREAT|O_LARGEFILE, 0666), 25), "w")); 281 mal_trace(1); 282 #endif /* MALLOC_TRACE */ 283 284 #if !(defined(BSDTIMES) || defined(_SEQUENT_)) && defined(POSIX) 285 # ifdef _SC_CLK_TCK 286 clk_tck = (clock_t) sysconf(_SC_CLK_TCK); 287 # else /* ! _SC_CLK_TCK */ 288 # ifdef CLK_TCK 289 clk_tck = CLK_TCK; 290 # else /* !CLK_TCK */ 291 clk_tck = HZ; 292 # endif /* CLK_TCK */ 293 # endif /* _SC_CLK_TCK */ 294 #endif /* !BSDTIMES && POSIX */ 295 296 settimes(); /* Immed. estab. timing base */ 297 #ifdef TESLA 298 do_logout = 0; 299 #endif /* TESLA */ 300 301 /* 302 * Make sure we have 0, 1, 2 open 303 * Otherwise `` jobs will not work... (From knaff@poly.polytechnique.fr) 304 */ 305 { 306 do 307 if ((f = xopen(_PATH_DEVNULL, O_RDONLY|O_LARGEFILE)) == -1 && 308 (f = xopen("/", O_RDONLY|O_LARGEFILE)) == -1) 309 exit(1); 310 while (f < 3); 311 xclose(f); 312 } 313 314 osinit(); /* Os dependent initialization */ 315 316 317 { 318 char *t; 319 320 t = strrchr(argv[0], '/'); 321 #ifdef WINNT_NATIVE 322 { 323 char *s = strrchr(argv[0], '\\'); 324 if (s) 325 t = s; 326 } 327 #endif /* WINNT_NATIVE */ 328 t = t ? t + 1 : argv[0]; 329 if (*t == '-') t++; 330 progname = strsave((t && *t) ? t : tcshstr); /* never want a null */ 331 tcsh = strncmp(progname, tcshstr, sizeof(tcshstr) - 1) == 0; 332 } 333 334 /* 335 * Initialize non constant strings 336 */ 337 #ifdef _PATH_BSHELL 338 STR_BSHELL = SAVE(_PATH_BSHELL); 339 #endif 340 #ifdef _PATH_TCSHELL 341 STR_SHELLPATH = SAVE(_PATH_TCSHELL); 342 #else 343 # ifdef _PATH_CSHELL 344 STR_SHELLPATH = SAVE(_PATH_CSHELL); 345 # endif 346 #endif 347 STR_WORD_CHARS = SAVE(WORD_CHARS); 348 STR_WORD_CHARS_VI = SAVE(WORD_CHARS_VI); 349 350 HIST = '!'; 351 HISTSUB = '^'; 352 PRCH = tcsh ? '>' : '%'; /* to replace %# in $prompt for normal users */ 353 PRCHROOT = '#'; /* likewise for root */ 354 word_chars = STR_WORD_CHARS; 355 bslash_quote = 0; /* PWP: do tcsh-style backslash quoting? */ 356 anyerror = 1; /* for compatibility */ 357 setcopy(STRanyerror, STRNULL, VAR_READWRITE); 358 359 /* Default history size to 100 */ 360 setcopy(STRhistory, str2short("100"), VAR_READWRITE); 361 sethistory(100); 362 363 tempv = argv; 364 ffile = SAVE(tempv[0]); 365 dolzero = 0; 366 if (eq(ffile, STRaout)) /* A.out's are quittable */ 367 quitit = 1; 368 uid = getuid(); 369 gid = getgid(); 370 euid = geteuid(); 371 egid = getegid(); 372 /* 373 * We are a login shell if: 1. we were invoked as -<something> with 374 * optional arguments 2. or we were invoked only with the -l flag 375 */ 376 loginsh = (**tempv == '-') || (argc == 2 && 377 tempv[1][0] == '-' && tempv[1][1] == 'l' && 378 tempv[1][2] == '\0'); 379 #ifdef _VMS_POSIX 380 /* No better way to find if we are a login shell */ 381 if (!loginsh) { 382 loginsh = (argc == 1 && getppid() == 1); 383 **tempv = '-'; /* Avoid giving VMS an acidic stomach */ 384 } 385 #endif /* _VMS_POSIX */ 386 387 if (loginsh && **tempv != '-') { 388 char *argv0; 389 390 /* 391 * Mangle the argv space 392 */ 393 tempv[1][0] = '\0'; 394 tempv[1][1] = '\0'; 395 tempv[1] = NULL; 396 argv0 = strspl("-", *tempv); 397 *tempv = argv0; 398 argc--; 399 } 400 if (loginsh) { 401 (void) time(&chktim); 402 setNS(STRloginsh); 403 } 404 405 NoNLSRebind = getenv("NOREBIND") != NULL; 406 #ifdef NLS 407 # ifdef SETLOCALEBUG 408 dont_free = 1; 409 # endif /* SETLOCALEBUG */ 410 (void) setlocale(LC_ALL, ""); 411 # ifdef LC_COLLATE 412 (void) setlocale(LC_COLLATE, ""); 413 # endif 414 # ifdef SETLOCALEBUG 415 dont_free = 0; 416 # endif /* SETLOCALEBUG */ 417 # ifdef STRCOLLBUG 418 fix_strcoll_bug(); 419 # endif /* STRCOLLBUG */ 420 421 /* 422 * On solaris ISO8859-1 contains no printable characters in the upper half 423 * so we need to test only for MB_CUR_MAX == 1, otherwise for multi-byte 424 * locales we are always AsciiOnly == 0. 425 */ 426 if (MB_CUR_MAX == 1) { 427 int k; 428 429 for (k = 0200; k <= 0377 && !isprint(CTL_ESC(k)); k++) 430 continue; 431 AsciiOnly = k > 0377; 432 } else 433 AsciiOnly = 0; 434 #else 435 AsciiOnly = getenv("LANG") == NULL && getenv("LC_CTYPE") == NULL; 436 #endif /* NLS */ 437 if (MapsAreInited && !NLSMapsAreInited) 438 ed_InitNLSMaps(); 439 ResetArrowKeys(); 440 441 /* 442 * Initialize for periodic command intervals. Also, initialize the dummy 443 * tty list for login-watch. 444 */ 445 (void) time(&t_period); 446 #ifndef HAVENOUTMP 447 initwatch(); 448 #endif /* !HAVENOUTMP */ 449 450 #if defined(alliant) 451 /* 452 * From: Jim Pace <jdp@research.att.com> 453 * tcsh does not work properly on the alliants through an rlogin session. 454 * The shell generally hangs. Also, reference to the controlling terminal 455 * does not work ( ie: echo foo > /dev/tty ). 456 * 457 * A security feature was added to rlogind affecting FX/80's Concentrix 458 * from revision 5.5.xx upwards (through 5.7 where this fix was implemented) 459 * This security change also affects the FX/2800 series. 460 * The security change to rlogind requires the process group of an rlogin 461 * session become disassociated with the tty in rlogind. 462 * 463 * The changes needed are: 464 * 1. set the process group 465 * 2. reenable the control terminal 466 */ 467 if (loginsh && isatty(SHIN)) { 468 ttyn = ttyname(SHIN); 469 xclose(SHIN); 470 SHIN = xopen(ttyn, O_RDWR|O_LARGEFILE); 471 shpgrp = getpid(); 472 (void) ioctl (SHIN, TIOCSPGRP, (ioctl_t) &shpgrp); 473 (void) setpgid(0, shpgrp); 474 } 475 #endif /* alliant */ 476 477 /* 478 * Move the descriptors to safe places. The variable didfds is 0 while we 479 * have only FSH* to work with. When didfds is true, we have 0,1,2 and 480 * prefer to use these. 481 */ 482 initdesc(); 483 484 cdtohome = 1; 485 setv(STRcdtohome, SAVE(""), VAR_READWRITE); 486 487 /* 488 * Get and set the tty now 489 */ 490 if ((ttyn = ttyname(SHIN)) != NULL) { 491 /* 492 * Could use rindex to get rid of other possible path components, but 493 * hpux preserves the subdirectory /pty/ when storing the tty name in 494 * utmp, so we keep it too. 495 */ 496 if (strncmp(ttyn, "/dev/", 5) == 0) 497 setv(STRtty, cp = SAVE(ttyn + 5), VAR_READWRITE); 498 else 499 setv(STRtty, cp = SAVE(ttyn), VAR_READWRITE); 500 } 501 else 502 setv(STRtty, cp = SAVE(""), VAR_READWRITE); 503 504 /* 505 * Initialize the shell variables. ARGV and PROMPT are initialized later. 506 * STATUS is also munged in several places. CHILD is munged when 507 * forking/waiting 508 */ 509 510 /* 511 * 7-10-87 Paul Placeway autologout should be set ONLY on login shells and 512 * on shells running as root. Out of these, autologout should NOT be set 513 * for any psudo-terminals (this catches most window systems) and not for 514 * any terminal running X windows. 515 * 516 * At Ohio State, we have had problems with a user having his X session 517 * drop out from under him (on a Sun) because the shell in his master 518 * xterm timed out and exited. 519 * 520 * Really, this should be done with a program external to the shell, that 521 * watches for no activity (and NO running programs, such as dump) on a 522 * terminal for a long peroid of time, and then SIGHUPS the shell on that 523 * terminal. 524 * 525 * bugfix by Rich Salz <rsalz@PINEAPPLE.BBN.COM>: For root rsh things 526 * allways first check to see if loginsh or really root, then do things 527 * with ttyname() 528 * 529 * Also by Jean-Francois Lamy <lamy%ai.toronto.edu@RELAY.CS.NET>: check the 530 * value of cp before using it! ("root can rsh too") 531 * 532 * PWP: keep the nested ifs; the order of the tests matters and a good 533 * (smart) C compiler might re-arange things wrong. 534 */ 535 #ifdef AUTOLOGOUT 536 # ifdef convex 537 if (uid == 0) 538 /* root always has a 15 minute autologout */ 539 setcopy(STRautologout, STRrootdefautologout, VAR_READWRITE); 540 else 541 if (loginsh) 542 /* users get autologout set to 0 */ 543 setcopy(STRautologout, STR0, VAR_READWRITE); 544 # else /* convex */ 545 if (loginsh || (uid == 0)) { 546 if (*cp) { 547 /* only for login shells or root and we must have a tty */ 548 if (((cp2 = Strrchr(cp, (Char) '/')) != NULL) && 549 (Strncmp(cp, STRptssl, 3) != 0)) { 550 cp2 = cp2 + 1; 551 } 552 else 553 cp2 = cp; 554 if (!(((Strncmp(cp2, STRtty, 3) == 0) && Isalpha(cp2[3])) || 555 Strstr(cp, STRptssl) != NULL)) { 556 if (getenv("DISPLAY") == NULL) { 557 /* NOT on X window shells */ 558 setcopy(STRautologout, STRdefautologout, VAR_READWRITE); 559 } 560 } 561 } 562 } 563 # endif /* convex */ 564 #endif /* AUTOLOGOUT */ 565 566 sigset_interrupting(SIGALRM, queue_alrmcatch); 567 568 setstatus(0); 569 570 /* 571 * get and set machine specific environment variables 572 */ 573 getmachine(); 574 575 576 /* 577 * Publish the selected echo style 578 */ 579 #if ECHO_STYLE != BSD_ECHO 580 if (tcsh) { 581 # if ECHO_STYLE == NONE_ECHO 582 setcopy(STRecho_style, STRnone, VAR_READWRITE); 583 # endif /* ECHO_STYLE == NONE_ECHO */ 584 # if ECHO_STYLE == SYSV_ECHO 585 setcopy(STRecho_style, STRsysv, VAR_READWRITE); 586 # endif /* ECHO_STYLE == SYSV_ECHO */ 587 # if ECHO_STYLE == BOTH_ECHO 588 setcopy(STRecho_style, STRboth, VAR_READWRITE); 589 # endif /* ECHO_STYLE == BOTH_ECHO */ 590 } else 591 #endif /* ECHO_STYLE != BSD_ECHO */ 592 setcopy(STRecho_style, STRbsd, VAR_READWRITE); 593 594 /* 595 * increment the shell level. 596 */ 597 shlvl(1); 598 599 #ifdef __ANDROID__ 600 /* On Android, $HOME either isn't set or set to /data, a R/O location. 601 Check for the environment variable EXTERNAL_STORAGE, which contains 602 the mount point of the external storage (SD card, mostly). If 603 EXTERNAL_STORAGE isn't set fall back to "/sdcard". Eventually 604 override $HOME so the environment is on the same page. */ 605 if (((tcp = getenv("HOME")) != NULL && strcmp (tcp, "/data") != 0) 606 || (tcp = getenv("EXTERNAL_STORAGE")) != NULL) { 607 cp = quote(SAVE(tcp)); 608 } else 609 cp = quote(SAVE("/sdcard")); 610 tsetenv(STRKHOME, cp); 611 #else 612 if ((tcp = getenv("HOME")) != NULL) 613 cp = quote(SAVE(tcp)); 614 else 615 cp = NULL; 616 #endif 617 618 if (cp == NULL) 619 fast = 1; /* No home -> can't read scripts */ 620 else 621 setv(STRhome, cp, VAR_READWRITE); 622 623 dinit(cp); /* dinit thinks that HOME == cwd in a login 624 * shell */ 625 /* 626 * Grab other useful things from the environment. Should we grab 627 * everything?? 628 */ 629 { 630 char *cln, *cus, *cgr; 631 struct passwd *pw; 632 struct group *gr; 633 634 635 #ifdef apollo 636 int oid = getoid(); 637 638 setv(STRoid, Itoa(oid, 0, 0), VAR_READWRITE); 639 #endif /* apollo */ 640 641 setv(STReuid, Itoa(euid, 0, 0), VAR_READWRITE); 642 if ((pw = xgetpwuid(euid)) == NULL) 643 setcopy(STReuser, STRunknown, VAR_READWRITE); 644 else 645 setcopy(STReuser, str2short(pw->pw_name), VAR_READWRITE); 646 647 setv(STRuid, Itoa(uid, 0, 0), VAR_READWRITE); 648 649 setv(STRgid, Itoa(gid, 0, 0), VAR_READWRITE); 650 651 cln = getenv("LOGNAME"); 652 cus = getenv("USER"); 653 if (cus != NULL) 654 setv(STRuser, quote(SAVE(cus)), VAR_READWRITE); 655 else if (cln != NULL) 656 setv(STRuser, quote(SAVE(cln)), VAR_READWRITE); 657 else if ((pw = xgetpwuid(uid)) == NULL) 658 setcopy(STRuser, STRunknown, VAR_READWRITE); 659 else 660 setcopy(STRuser, str2short(pw->pw_name), VAR_READWRITE); 661 if (cln == NULL) 662 tsetenv(STRLOGNAME, varval(STRuser)); 663 if (cus == NULL) 664 tsetenv(STRKUSER, varval(STRuser)); 665 666 cgr = getenv("GROUP"); 667 if (cgr != NULL) 668 setv(STRgroup, quote(SAVE(cgr)), VAR_READWRITE); 669 else if ((gr = xgetgrgid(gid)) == NULL) 670 setcopy(STRgroup, STRunknown, VAR_READWRITE); 671 else 672 setcopy(STRgroup, str2short(gr->gr_name), VAR_READWRITE); 673 if (cgr == NULL) 674 tsetenv(STRKGROUP, varval(STRgroup)); 675 } 676 677 /* 678 * HOST may be wrong, since rexd transports the entire environment on sun 679 * 3.x Just set it again 680 */ 681 { 682 char cbuff[MAXHOSTNAMELEN]; 683 684 if (gethostname(cbuff, sizeof(cbuff)) >= 0) { 685 cbuff[sizeof(cbuff) - 1] = '\0'; /* just in case */ 686 tsetenv(STRHOST, str2short(cbuff)); 687 } 688 else 689 tsetenv(STRHOST, STRunknown); 690 } 691 692 693 #ifdef REMOTEHOST 694 /* 695 * Try to determine the remote host we were logged in from. 696 */ 697 remotehost(); 698 #endif /* REMOTEHOST */ 699 700 #ifdef apollo 701 if ((tcp = getenv("SYSTYPE")) == NULL) 702 tcp = "bsd4.3"; 703 tsetenv(STRSYSTYPE, quote(str2short(tcp))); 704 #endif /* apollo */ 705 706 /* 707 * set editing on by default, unless running under Emacs as an inferior 708 * shell. 709 * We try to do this intelligently. If $TERM is available, then it 710 * should determine if we should edit or not. $TERM is preserved 711 * across rlogin sessions, so we will not get confused if we rlogin 712 * under an emacs shell. Another advantage is that if we run an 713 * xterm under an emacs shell, then the $TERM will be set to 714 * xterm, so we are going to want to edit. Unfortunately emacs 715 * does not restore all the tty modes, so xterm is not very well 716 * set up. But this is not the shell's fault. 717 * Also don't edit if $TERM == wm, for when we're running under an ATK app. 718 * Finally, emacs compiled under terminfo, sets the terminal to dumb, 719 * so disable editing for that too. 720 * 721 * Unfortunately, in some cases the initial $TERM setting is "unknown", 722 * "dumb", or "network" which is then changed in the user's startup files. 723 * We fix this by setting noediting here if $TERM is unknown/dumb and 724 * if noediting is set, we switch on editing if $TERM is changed. 725 */ 726 if ((tcp = getenv("TERM")) != NULL) { 727 setv(STRterm, quote(SAVE(tcp)), VAR_READWRITE); 728 noediting = strcmp(tcp, "unknown") == 0 || strcmp(tcp, "dumb") == 0 || 729 strcmp(tcp, "network") == 0; 730 editing = strcmp(tcp, "emacs") != 0 && strcmp(tcp, "wm") != 0 && 731 !noediting; 732 } 733 else { 734 noediting = 0; 735 editing = ((tcp = getenv("EMACS")) == NULL || strcmp(tcp, "t") != 0); 736 } 737 738 /* 739 * The 'edit' variable is either set or unset. It doesn't 740 * need a value. Making it 'emacs' might be confusing. 741 */ 742 if (editing) 743 setNS(STRedit); 744 745 746 /* 747 * still more mutability: make the complete routine automatically add the 748 * suffix of file names... 749 */ 750 setNS(STRaddsuffix); 751 752 /* 753 * Compatibility with tcsh >= 6.12 by default 754 */ 755 setNS(STRcsubstnonl); 756 757 /* 758 * Random default kill ring size 759 */ 760 setcopy(STRkillring, str2short("30"), VAR_READWRITE); 761 762 /* 763 * Re-initialize path if set in environment 764 */ 765 if ((tcp = getenv("PATH")) == NULL) { 766 #ifdef _PATH_DEFPATH 767 importpath(str2short(_PATH_DEFPATH)); 768 #else /* !_PATH_DEFPATH */ 769 setq(STRpath, defaultpath(), &shvhed, VAR_READWRITE); 770 #endif /* _PATH_DEFPATH */ 771 /* 772 * Export the path setting so that subsequent processes use the same path as we do. 773 */ 774 exportpath(adrof(STRpath)->vec); 775 } else 776 /* Importpath() allocates memory for the path, and the 777 * returned pointer from SAVE() was discarded, so 778 * this was a memory leak.. (sg) 779 * 780 * importpath(SAVE(tcp)); 781 */ 782 importpath(str2short(tcp)); 783 784 785 { 786 /* If the SHELL environment variable ends with "tcsh", set 787 * STRshell to the same path. This is to facilitate using 788 * the executable in environments where the compiled-in 789 * default isn't appropriate (sg). 790 */ 791 792 size_t sh_len = 0; 793 794 if ((tcp = getenv("SHELL")) != NULL) { 795 sh_len = strlen(tcp); 796 if ((sh_len >= 5 && strcmp(tcp + (sh_len - 5), "/tcsh") == 0) || 797 (!tcsh && sh_len >= 4 && strcmp(tcp + (sh_len - 4), "/csh") == 0)) 798 setv(STRshell, quote(SAVE(tcp)), VAR_READWRITE); 799 else 800 sh_len = 0; 801 } 802 if (sh_len == 0) 803 setcopy(STRshell, STR_SHELLPATH, VAR_READWRITE); 804 } 805 806 #ifdef _OSD_POSIX /* BS2000 needs this variable set to "SHELL" */ 807 if ((tcp = getenv("PROGRAM_ENVIRONMENT")) == NULL) 808 tcp = "SHELL"; 809 tsetenv(STRPROGRAM_ENVIRONMENT, quote(str2short(tcp))); 810 #endif /* _OSD_POSIX */ 811 812 #ifdef COLOR_LS_F 813 if ((tcp = getenv("LS_COLORS")) != NULL) 814 parseLS_COLORS(str2short(tcp)); 815 if ((tcp = getenv("LSCOLORS")) != NULL) 816 parseLSCOLORS(str2short(tcp)); 817 #endif /* COLOR_LS_F */ 818 819 mainpid = getpid(); 820 doldol = putn((tcsh_number_t)mainpid); /* For $$ */ 821 #ifdef WINNT_NATIVE 822 { 823 char *tmp; 824 Char *tmp2; 825 if ((tmp = getenv("TMP")) != NULL) { 826 tmp = xasprintf("%s/%s", tmp, "sh"); 827 tmp2 = SAVE(tmp); 828 xfree(tmp); 829 } 830 else { 831 tmp2 = SAVE(""); 832 } 833 shtemp = Strspl(tmp2, doldol); /* For << */ 834 xfree(tmp2); 835 } 836 #else /* !WINNT_NATIVE */ 837 #ifdef HAVE_MKSTEMP 838 { 839 const char *tmpdir = getenv ("TMPDIR"); 840 if (!tmpdir) 841 tmpdir = "/tmp"; 842 shtemp = Strspl(SAVE(tmpdir), SAVE("/sh" TMP_TEMPLATE)); /* For << */ 843 } 844 #else /* !HAVE_MKSTEMP */ 845 shtemp = Strspl(STRtmpsh, doldol); /* For << */ 846 #endif /* HAVE_MKSTEMP */ 847 #endif /* WINNT_NATIVE */ 848 849 /* 850 * Record the interrupt states from the parent process. If the parent is 851 * non-interruptible our hand must be forced or we (and our children) won't 852 * be either. Our children inherit termination from our parent. We catch it 853 * only if we are the login shell. 854 */ 855 sigaction(SIGINT, NULL, &parintr); 856 sigaction(SIGTERM, NULL, &parterm); 857 858 859 #ifdef TCF 860 /* Enable process migration on ourselves and our progeny */ 861 (void) signal(SIGMIGRATE, SIG_DFL); 862 #endif /* TCF */ 863 864 /* 865 * dspkanji/dspmbyte autosetting 866 */ 867 /* PATCH IDEA FROM Issei.Suzuki VERY THANKS */ 868 #if defined(DSPMBYTE) 869 #if defined(NLS) && defined(LC_CTYPE) 870 if (((tcp = setlocale(LC_CTYPE, NULL)) != NULL || (tcp = getenv("LANG")) != NULL) && !adrof(CHECK_MBYTEVAR)) 871 #else 872 if ((tcp = getenv("LANG")) != NULL && !adrof(CHECK_MBYTEVAR)) 873 #endif 874 { 875 autoset_dspmbyte(str2short(tcp)); 876 } 877 #if defined(WINNT_NATIVE) 878 else if (!adrof(CHECK_MBYTEVAR)) 879 nt_autoset_dspmbyte(); 880 #endif /* WINNT_NATIVE */ 881 #endif 882 #if defined(AUTOSET_KANJI) 883 # if defined(NLS) && defined(LC_CTYPE) 884 if (setlocale(LC_CTYPE, NULL) != NULL || getenv("LANG") != NULL) 885 # else 886 if (getenv("LANG") != NULL) 887 # endif 888 autoset_kanji(); 889 #endif /* AUTOSET_KANJI */ 890 fix_version(); /* publish the shell version */ 891 892 if (argc > 1 && strcmp(argv[1], "--version") == 0) { 893 xprintf("%" TCSH_S "\n", varval(STRversion)); 894 xexit(0); 895 } 896 if (argc > 1 && strcmp(argv[1], "--help") == 0) { 897 xprintf("%" TCSH_S "\n\n", varval(STRversion)); 898 xprintf("%s", CGETS(11, 8, HELP_STRING)); 899 xexit(0); 900 } 901 /* 902 * Process the arguments. 903 * 904 * Note that processing of -v/-x is actually delayed till after script 905 * processing. 906 * 907 * We set the first character of our name to be '-' if we are a shell 908 * running interruptible commands. Many programs which examine ps'es 909 * use this to filter such shells out. 910 */ 911 argc--, tempv++; 912 while (argc > 0 && (tcp = tempv[0])[0] == '-' && 913 *++tcp != '\0' && !batch) { 914 do 915 switch (*tcp++) { 916 917 case 0: /* - Interruptible, no prompt */ 918 prompt = 0; 919 setintr = 1; 920 nofile = 1; 921 break; 922 923 case 'b': /* -b Next arg is input file */ 924 batch = 1; 925 break; 926 927 case 'c': /* -c Command input from arg */ 928 if (argc == 1) 929 xexit(0); 930 argc--, tempv++; 931 #ifdef M_XENIX 932 /* Xenix Vi bug: 933 it relies on a 7 bit environment (/bin/sh), so it 934 pass ascii arguments with the 8th bit set */ 935 if (!strcmp(argv[0], "sh")) 936 { 937 char *p; 938 939 for (p = tempv[0]; *p; ++p) 940 *p &= ASCII; 941 } 942 #endif 943 targinp = tempv[0]; 944 prompt = 0; 945 nofile = 1; 946 break; 947 case 'd': /* -d Load directory stack from file */ 948 rdirs = 1; 949 break; 950 951 #ifdef apollo 952 case 'D': /* -D Define environment variable */ 953 { 954 Char *dp; 955 956 cp = str2short(tcp); 957 if (dp = Strchr(cp, '=')) { 958 *dp++ = '\0'; 959 tsetenv(cp, dp); 960 } 961 else 962 tsetenv(cp, STRNULL); 963 } 964 *tcp = '\0'; /* done with this argument */ 965 break; 966 #endif /* apollo */ 967 968 case 'e': /* -e Exit on any error */ 969 exiterr = 1; 970 break; 971 972 case 'f': /* -f Fast start */ 973 fast = 1; 974 break; 975 976 case 'i': /* -i Interactive, even if !intty */ 977 intact = 1; 978 nofile = 1; 979 break; 980 981 case 'm': /* -m read .cshrc (from su) */ 982 mflag = 1; 983 break; 984 985 case 'n': /* -n Don't execute */ 986 noexec = 1; 987 break; 988 989 case 'q': /* -q (Undoc'd) ... die on quit */ 990 quitit = 1; 991 break; 992 993 case 's': /* -s Read from std input */ 994 nofile = 1; 995 break; 996 997 case 't': /* -t Read one line from input */ 998 onelflg = 2; 999 prompt = 0; 1000 nofile = 1; 1001 break; 1002 1003 case 'v': /* -v Echo hist expanded input */ 1004 nverbose = 1; /* ... later */ 1005 break; 1006 1007 case 'x': /* -x Echo just before execution */ 1008 nexececho = 1; /* ... later */ 1009 break; 1010 1011 case 'V': /* -V Echo hist expanded input */ 1012 setNS(STRverbose); /* NOW! */ 1013 break; 1014 1015 case 'X': /* -X Echo just before execution */ 1016 setNS(STRecho); /* NOW! */ 1017 break; 1018 1019 case 'F': 1020 /* 1021 * This will cause children to be created using fork instead of 1022 * vfork. 1023 */ 1024 use_fork = 1; 1025 break; 1026 1027 case ' ': 1028 case '\t': 1029 case '\r': 1030 case '\n': 1031 /* 1032 * for O/S's that don't do the argument parsing right in 1033 * "#!/foo -f " scripts 1034 */ 1035 break; 1036 1037 default: /* Unknown command option */ 1038 exiterr = 1; 1039 stderror(ERR_TCSHUSAGE, tcp-1, progname); 1040 break; 1041 1042 } while (*tcp); 1043 tempv++, argc--; 1044 } 1045 1046 if (quitit) /* With all due haste, for debugging */ 1047 (void) signal(SIGQUIT, SIG_DFL); 1048 1049 /* 1050 * Unless prevented by -, -c, -i, -s, or -t, if there are remaining 1051 * arguments the first of them is the name of a shell file from which to 1052 * read commands. 1053 */ 1054 if (nofile == 0 && argc > 0) { 1055 nofile = xopen(tempv[0], O_RDONLY|O_LARGEFILE); 1056 if (nofile < 0) { 1057 child = 1; /* So this ... */ 1058 /* ... doesn't return */ 1059 stderror(ERR_SYSTEM, tempv[0], strerror(errno)); 1060 } 1061 xfree(ffile); 1062 dolzero = 1; 1063 ffile = SAVE(tempv[0]); 1064 /* 1065 * Replace FSHIN. Handle /dev/std{in,out,err} specially 1066 * since once they are closed we cannot open them again. 1067 * In that case we use our own saved descriptors 1068 */ 1069 if ((SHIN = dmove(nofile, FSHIN)) < 0) 1070 switch(nofile) { 1071 case 0: 1072 SHIN = FSHIN; 1073 break; 1074 case 1: 1075 SHIN = FSHOUT; 1076 break; 1077 case 2: 1078 SHIN = FSHDIAG; 1079 break; 1080 default: 1081 stderror(ERR_SYSTEM, tempv[0], strerror(errno)); 1082 break; 1083 } 1084 (void) close_on_exec(SHIN, 1); 1085 prompt = 0; 1086 /* argc not used any more */ tempv++; 1087 } 1088 1089 /* 1090 * Call to closem() used to be part of initdesc(). Now called below where 1091 * the script name argument has become stdin. Kernel may have used a file 1092 * descriptor to hold the name of the script (setuid case) and this name 1093 * mustn't be lost by closing the fd too soon. 1094 */ 1095 closem(); 1096 1097 /* 1098 * Consider input a tty if it really is or we are interactive. but not for 1099 * editing (christos) 1100 */ 1101 if (!(intty = isatty(SHIN))) { 1102 if (adrof(STRedit)) 1103 unsetv(STRedit); 1104 editing = 0; 1105 } 1106 intty |= intact; 1107 #ifndef convex 1108 if (intty || (intact && isatty(SHOUT))) { 1109 if (!batch && (uid != euid || gid != egid)) { 1110 errno = EACCES; 1111 child = 1; /* So this ... */ 1112 /* ... doesn't return */ 1113 stderror(ERR_SYSTEM, progname, strerror(errno)); 1114 } 1115 } 1116 #endif /* convex */ 1117 isoutatty = isatty(SHOUT); 1118 isdiagatty = isatty(SHDIAG); 1119 /* 1120 * Decide whether we should play with signals or not. If we are explicitly 1121 * told (via -i, or -) or we are a login shell (arg0 starts with -) or the 1122 * input and output are both the ttys("csh", or "csh</dev/ttyx>/dev/ttyx") 1123 * Note that in only the login shell is it likely that parent may have set 1124 * signals to be ignored 1125 */ 1126 if (loginsh || intact || (intty && isatty(SHOUT))) 1127 setintr = 1; 1128 settell(); 1129 /* 1130 * Save the remaining arguments in argv. 1131 */ 1132 setq(STRargv, blk2short(tempv), &shvhed, VAR_READWRITE); 1133 1134 /* 1135 * Set up the prompt. 1136 */ 1137 if (prompt) { 1138 setcopy(STRprompt, STRdefprompt, VAR_READWRITE); 1139 /* that's a meta-questionmark */ 1140 setcopy(STRprompt2, STRmquestion, VAR_READWRITE); 1141 setcopy(STRprompt3, STRKCORRECT, VAR_READWRITE); 1142 } 1143 1144 /* 1145 * If we are an interactive shell, then start fiddling with the signals; 1146 * this is a tricky game. 1147 */ 1148 shpgrp = mygetpgrp(); 1149 opgrp = tpgrp = -1; 1150 if (setintr) { 1151 struct sigaction osig; 1152 1153 **argv = '-'; 1154 if (!quitit) /* Wary! */ 1155 (void) signal(SIGQUIT, SIG_IGN); 1156 pintr_disabled = 1; 1157 sigset_interrupting(SIGINT, queue_pintr); 1158 (void) signal(SIGTERM, SIG_IGN); 1159 1160 /* 1161 * No reason I can see not to save history on all these events.. 1162 * Most usual occurrence is in a window system, where we're not a login 1163 * shell, but might as well be... (sg) 1164 * But there might be races when lots of shells exit together... 1165 * [this is also incompatible]. 1166 * We have to be mre careful here. If the parent wants to 1167 * ignore the signals then we leave them untouched... 1168 * We also only setup the handlers for shells that are trully 1169 * interactive. 1170 */ 1171 sigaction(SIGHUP, NULL, &osig); 1172 if (loginsh || osig.sa_handler != SIG_IGN) 1173 /* exit processing on HUP */ 1174 sigset_interrupting(SIGHUP, queue_phup); 1175 #ifdef SIGXCPU 1176 sigaction(SIGXCPU, NULL, &osig); 1177 if (loginsh || osig.sa_handler != SIG_IGN) 1178 /* exit processing on XCPU */ 1179 sigset_interrupting(SIGXCPU, queue_phup); 1180 #endif 1181 #ifdef SIGXFSZ 1182 sigaction(SIGXFSZ, NULL, &osig); 1183 if (loginsh || osig.sa_handler != SIG_IGN) 1184 /* exit processing on XFSZ */ 1185 sigset_interrupting(SIGXFSZ, queue_phup); 1186 #endif 1187 1188 if (quitit == 0 && targinp == 0) { 1189 #ifdef SIGTSTP 1190 (void) signal(SIGTSTP, SIG_IGN); 1191 #endif 1192 #ifdef SIGTTIN 1193 (void) signal(SIGTTIN, SIG_IGN); 1194 #endif 1195 #ifdef SIGTTOU 1196 (void) signal(SIGTTOU, SIG_IGN); 1197 #endif 1198 /* 1199 * Wait till in foreground, in case someone stupidly runs csh & 1200 * dont want to try to grab away the tty. 1201 */ 1202 if (isatty(FSHDIAG)) 1203 f = FSHDIAG; 1204 else if (isatty(FSHOUT)) 1205 f = FSHOUT; 1206 else if (isatty(OLDSTD)) 1207 f = OLDSTD; 1208 else 1209 f = -1; 1210 1211 #ifdef NeXT 1212 /* NeXT 2.0 /usr/etc/rlogind, does not set our process group! */ 1213 if (f != -1 && shpgrp == 0) { 1214 shpgrp = getpid(); 1215 (void) setpgid(0, shpgrp); 1216 (void) tcsetpgrp(f, shpgrp); 1217 } 1218 #endif /* NeXT */ 1219 #ifdef BSDJOBS /* if we have tty job control */ 1220 if (f != -1 && grabpgrp(f, shpgrp) != -1) { 1221 /* 1222 * Thanks to Matt Day for the POSIX references, and to 1223 * Paul Close for the SGI clarification. 1224 */ 1225 if (setdisc(f) != -1) { 1226 opgrp = shpgrp; 1227 shpgrp = getpid(); 1228 tpgrp = shpgrp; 1229 if (tcsetpgrp(f, shpgrp) == -1) { 1230 /* 1231 * On hpux 7.03 this fails with EPERM. This happens on 1232 * the 800 when opgrp != shpgrp at this point. (we were 1233 * forked from a non job control shell) 1234 * POSIX 7.2.4, says we failed because the process 1235 * group specified did not belong to a process 1236 * in the same session with the tty. So we set our 1237 * process group and try again. 1238 */ 1239 if (setpgid(0, shpgrp) == -1) { 1240 xprintf("setpgid:"); 1241 goto notty; 1242 } 1243 if (tcsetpgrp(f, shpgrp) == -1) { 1244 xprintf("tcsetpgrp:"); 1245 goto notty; 1246 } 1247 } 1248 /* 1249 * We check the process group now. If it is the same, then 1250 * we don't need to set it again. On hpux 7.0 on the 300's 1251 * if we set it again it fails with EPERM. This is the 1252 * correct behavior according to POSIX 4.3.3 if the process 1253 * was a session leader . 1254 */ 1255 else if (shpgrp != mygetpgrp()) { 1256 if (setpgid(0, shpgrp) == -1) { 1257 xprintf("setpgid:"); 1258 goto notty; 1259 } 1260 } 1261 #ifdef IRIS4D 1262 /* 1263 * But on irix 3.3 we need to set it again, even if it is 1264 * the same. We do that to tell the system that we 1265 * need BSD process group compatibility. 1266 */ 1267 else 1268 (void) setpgid(0, shpgrp); 1269 #endif 1270 (void) close_on_exec(dcopy(f, FSHTTY), 1); 1271 } 1272 else 1273 tpgrp = -1; 1274 } 1275 if (tpgrp == -1) { 1276 notty: 1277 xprintf(CGETS(11, 1, "Warning: no access to tty (%s).\n"), 1278 strerror(errno)); 1279 xprintf("%s", 1280 CGETS(11, 2, "Thus no job control in this shell.\n")); 1281 /* 1282 * Fix from:Sakari Jalovaara <sja@sirius.hut.fi> if we don't 1283 * have access to tty, disable editing too 1284 */ 1285 if (adrof(STRedit)) 1286 unsetv(STRedit); 1287 editing = 0; 1288 } 1289 #else /* BSDJOBS */ /* don't have job control, so frotz it */ 1290 tpgrp = -1; 1291 #endif /* BSDJOBS */ 1292 } 1293 } 1294 if (setintr == 0 && parintr.sa_handler == SIG_DFL) 1295 setintr = 1; 1296 1297 /* 1298 * SVR4 doesn't send a SIGCHLD when a child is stopped or continued if the 1299 * handler is installed with signal(2) or sigset(2). sigaction(2) must 1300 * be used instead. 1301 * 1302 * David Dawes (dawes@physics.su.oz.au) Sept 1991 1303 */ 1304 sigset_interrupting(SIGCHLD, queue_pchild); 1305 1306 if (intty && !targinp) 1307 (void) ed_Setup(editing);/* Get the tty state, and set defaults */ 1308 /* Only alter the tty state if editing */ 1309 1310 /* 1311 * Set an exit here in case of an interrupt or error reading the shell 1312 * start-up scripts. 1313 */ 1314 osetintr = setintr; 1315 oparintr = parintr; 1316 (void)cleanup_push_mark(); /* There is no outer handler */ 1317 if (setexit() != 0) /* PWP */ 1318 reenter = 1; 1319 else 1320 reenter = 0; 1321 exitset++; 1322 haderr = 0; /* In case second time through */ 1323 if (!fast && reenter == 0) { 1324 /* Will have varval(STRhome) here because set fast if don't */ 1325 { 1326 pintr_disabled++; 1327 cleanup_push(&pintr_disabled, disabled_cleanup); 1328 setintr = 0;/*FIXRESET:cleanup*/ 1329 /* onintr in /etc/ files has no effect */ 1330 parintr.sa_handler = SIG_IGN;/*FIXRESET: cleanup*/ 1331 #ifdef LOGINFIRST 1332 #ifdef _PATH_DOTLOGIN 1333 if (loginsh) 1334 (void) srcfile(_PATH_DOTLOGIN, 0, 0, NULL); 1335 #endif 1336 #endif 1337 1338 #ifdef _PATH_DOTCSHRC 1339 (void) srcfile(_PATH_DOTCSHRC, 0, 0, NULL); 1340 #endif 1341 if (!targinp && !onelflg && !havhash) 1342 dohash(NULL,NULL); 1343 #ifndef LOGINFIRST 1344 #ifdef _PATH_DOTLOGIN 1345 if (loginsh) 1346 (void) srcfile(_PATH_DOTLOGIN, 0, 0, NULL); 1347 #endif 1348 #endif 1349 cleanup_until(&pintr_disabled); 1350 setintr = osetintr; 1351 parintr = oparintr; 1352 } 1353 #ifdef LOGINFIRST 1354 if (loginsh) 1355 (void) srccat(varval(STRhome), STRsldotlogin); 1356 #endif 1357 /* upward compat. */ 1358 if (!srccat(varval(STRhome), STRsldottcshrc)) 1359 (void) srccat(varval(STRhome), STRsldotcshrc); 1360 1361 if (!targinp && !onelflg && !havhash) 1362 dohash(NULL,NULL); 1363 1364 /* 1365 * Source history before .login so that it is available in .login 1366 */ 1367 loadhist(NULL, 0); 1368 #ifndef LOGINFIRST 1369 if (loginsh) 1370 (void) srccat(varval(STRhome), STRsldotlogin); 1371 #endif 1372 if (loginsh || rdirs) 1373 loaddirs(NULL); 1374 } 1375 /* Reset interrupt flag */ 1376 setintr = osetintr; 1377 parintr = oparintr; 1378 exitset--; 1379 1380 /* Initing AFTER .cshrc is the Right Way */ 1381 if (intty && !targinp) { /* PWP setup stuff */ 1382 ed_Init(); /* init the new line editor */ 1383 #ifdef SIG_WINDOW 1384 check_window_size(1); /* mung environment */ 1385 #endif /* SIG_WINDOW */ 1386 } 1387 1388 /* 1389 * Now are ready for the -v and -x flags 1390 */ 1391 if (nverbose) 1392 setNS(STRverbose); 1393 if (nexececho) 1394 setNS(STRecho); 1395 1396 1397 if (targinp) { 1398 /* If this -c command caused an error before, skip processing */ 1399 if (reenter && arginp) { 1400 exitcode = 1; 1401 goto done; 1402 } 1403 1404 arginp = SAVE(targinp); 1405 /* 1406 * we put the command into a variable 1407 */ 1408 if (arginp != NULL) 1409 setv(STRcommand, quote(Strsave(arginp)), VAR_READWRITE); 1410 1411 /* 1412 * * Give an error on -c arguments that end in * backslash to 1413 * ensure that you don't make * nonportable csh scripts. 1414 */ 1415 { 1416 int count; 1417 1418 cp = Strend(arginp); 1419 count = 0; 1420 while (cp > arginp && *--cp == '\\') 1421 ++count; 1422 if ((count & 1) != 0) { 1423 exiterr = 1; 1424 stderror(ERR_ARGC); 1425 } 1426 } 1427 } 1428 /* 1429 * All the rest of the world is inside this call. The argument to process 1430 * indicates whether it should catch "error unwinds". Thus if we are a 1431 * interactive shell our call here will never return by being blown past on 1432 * an error. 1433 */ 1434 process(setintr); 1435 1436 done: 1437 /* 1438 * Mop-up. 1439 */ 1440 /* Take care of these (especially HUP) here instead of inside flush. */ 1441 handle_pending_signals(); 1442 if (intty) { 1443 if (loginsh) { 1444 xprintf("logout\n"); 1445 xclose(SHIN); 1446 child = 1; 1447 #ifdef TESLA 1448 do_logout = 1; 1449 #endif /* TESLA */ 1450 goodbye(NULL, NULL); 1451 } 1452 else { 1453 xprintf("exit\n"); 1454 } 1455 } 1456 record(); 1457 exitstat(); 1458 return exitcode; 1459 } 1460 1461 void 1462 untty(void) 1463 { 1464 #ifdef BSDJOBS 1465 if (tpgrp > 0 && opgrp != shpgrp) { 1466 (void) setpgid(0, opgrp); 1467 (void) tcsetpgrp(FSHTTY, opgrp); 1468 (void) resetdisc(FSHTTY); 1469 } 1470 #endif /* BSDJOBS */ 1471 } 1472 1473 void 1474 importpath(Char *cp) 1475 { 1476 size_t i = 0; 1477 Char *dp; 1478 Char **pv; 1479 int c; 1480 1481 for (dp = cp; *dp; dp++) 1482 if (*dp == PATHSEP) 1483 i++; 1484 /* 1485 * i+2 where i is the number of colons in the path. There are i+1 1486 * directories in the path plus we need room for a zero terminator. 1487 */ 1488 pv = xcalloc(i + 2, sizeof(Char *)); 1489 dp = cp; 1490 i = 0; 1491 if (*dp) 1492 for (;;) { 1493 if ((c = *dp) == PATHSEP || c == 0) { 1494 *dp = 0; 1495 pv[i++] = Strsave(*cp ? cp : STRdot); 1496 if (c) { 1497 cp = dp + 1; 1498 *dp = PATHSEP; 1499 } 1500 else 1501 break; 1502 } 1503 #ifdef WINNT_NATIVE 1504 else if (*dp == '\\') 1505 *dp = '/'; 1506 #endif /* WINNT_NATIVE */ 1507 dp++; 1508 } 1509 pv[i] = 0; 1510 cleanup_push(pv, blk_cleanup); 1511 setq(STRpath, pv, &shvhed, VAR_READWRITE); 1512 cleanup_ignore(pv); 1513 cleanup_until(pv); 1514 } 1515 1516 /* 1517 * Source to the file which is the catenation of the argument names. 1518 */ 1519 static int 1520 srccat(Char *cp, Char *dp) 1521 { 1522 if (cp[0] == '/' && cp[1] == '\0') 1523 return srcfile(short2str(dp), (mflag ? 0 : 1), 0, NULL); 1524 else { 1525 Char *ep; 1526 char *ptr; 1527 int rv; 1528 1529 #ifdef WINNT_NATIVE 1530 ep = Strend(cp); 1531 if (ep != cp && ep[-1] == '/' && dp[0] == '/') /* silly win95 */ 1532 dp++; 1533 #endif /* WINNT_NATIVE */ 1534 1535 ep = Strspl(cp, dp); 1536 cleanup_push(ep, xfree); 1537 ptr = short2str(ep); 1538 1539 rv = srcfile(ptr, (mflag ? 0 : 1), 0, NULL); 1540 cleanup_until(ep); 1541 return rv; 1542 } 1543 } 1544 1545 /* 1546 * Source to a file putting the file descriptor in a safe place (> 2). 1547 */ 1548 #ifndef WINNT_NATIVE 1549 static int 1550 #else 1551 int 1552 #endif /*WINNT_NATIVE*/ 1553 srcfile(const char *f, int onlyown, int flag, Char **av) 1554 { 1555 int unit; 1556 1557 if ((unit = xopen(f, O_RDONLY|O_LARGEFILE)) == -1) 1558 return 0; 1559 cleanup_push(&unit, open_cleanup); 1560 unit = dmove(unit, -1); 1561 cleanup_ignore(&unit); 1562 cleanup_until(&unit); 1563 1564 (void) close_on_exec(unit, 1); 1565 srcunit(unit, onlyown, flag, av); 1566 return 1; 1567 } 1568 1569 1570 /* 1571 * Save the shell state, and establish new argument vector, and new input 1572 * fd. 1573 */ 1574 static void 1575 st_save(struct saved_state *st, int unit, int hflg, Char **al, Char **av) 1576 { 1577 st->insource = insource; 1578 st->SHIN = SHIN; 1579 /* Want to preserve the meaning of "source file >output". 1580 * Save old descriptors, move new 0,1,2 to safe places and assign 1581 * them to SH* and let process() redo 0,1,2 from them. 1582 * 1583 * The macro returns true if d1 and d2 are good and they point to 1584 * different things. If you don't avoid saving duplicate 1585 * descriptors, you really limit the depth of "source" recursion 1586 * you can do because of all the open file descriptors. -IAN! 1587 */ 1588 #define NEED_SAVE_FD(d1,d2) \ 1589 (fstat(d1, &s1) != -1 && fstat(d2, &s2) != -1 \ 1590 && (s1.st_ino != s2.st_ino || s1.st_dev != s2.st_dev) ) 1591 1592 st->OLDSTD = st->SHOUT = st->SHDIAG = -1;/* test later to restore these */ 1593 if (didfds) { 1594 struct stat s1, s2; 1595 if (NEED_SAVE_FD(0,OLDSTD)) { 1596 st->OLDSTD = OLDSTD; 1597 OLDSTD = dmove(0, -1); 1598 (void)close_on_exec(OLDSTD, 1); 1599 } 1600 if (NEED_SAVE_FD(1,SHOUT)) { 1601 st->SHOUT = SHOUT; 1602 SHOUT = dmove(1, -1); 1603 (void)close_on_exec(SHOUT, 1); 1604 } 1605 if (NEED_SAVE_FD(2,SHDIAG)) { 1606 st->SHDIAG = SHDIAG; 1607 SHDIAG = dmove(2, -1); 1608 (void)close_on_exec(SHDIAG, 1); 1609 } 1610 donefds(); 1611 } 1612 1613 st->intty = intty; 1614 st->whyles = whyles; 1615 st->gointr = gointr; 1616 st->arginp = arginp; 1617 st->evalp = evalp; 1618 st->evalvec = evalvec; 1619 st->alvecp = alvecp; 1620 st->alvec = alvec; 1621 st->onelflg = onelflg; 1622 st->enterhist = enterhist; 1623 st->justpr = justpr; 1624 if (hflg) 1625 st->HIST = HIST; 1626 else 1627 st->HIST = '\0'; 1628 st->cantell = cantell; 1629 cpybin(st->B, B); 1630 1631 /* 1632 * we can now pass arguments to source. 1633 * For compatibility we do that only if arguments were really 1634 * passed, otherwise we keep the old, global $argv like before. 1635 */ 1636 if (av != NULL && *av != NULL) { 1637 struct varent *vp; 1638 if ((vp = adrof(STRargv)) != NULL && vp->vec != NULL) 1639 st->argv = saveblk(vp->vec); 1640 else 1641 st->argv = NULL; 1642 setq(STRargv, saveblk(av), &shvhed, VAR_READWRITE); 1643 } 1644 else 1645 st->argv = NULL; 1646 st->av = av; 1647 1648 SHIN = unit; /* Do this first */ 1649 1650 /* Establish new input arena */ 1651 { 1652 fbuf = NULL; 1653 fseekp = feobp = fblocks = 0; 1654 settell(); 1655 } 1656 1657 arginp = 0; 1658 onelflg = 0; 1659 intty = isatty(SHIN); 1660 whyles = 0; 1661 gointr = 0; 1662 evalvec = 0; 1663 evalp = 0; 1664 alvec = al; 1665 alvecp = 0; 1666 enterhist = hflg; 1667 if (enterhist) 1668 HIST = '\0'; 1669 insource = 1; 1670 } 1671 1672 1673 /* 1674 * Restore the shell to a saved state 1675 */ 1676 static void 1677 st_restore(void *xst) 1678 { 1679 struct saved_state *st; 1680 1681 st = xst; 1682 if (st->SHIN == -1) 1683 return; 1684 1685 /* Reset input arena */ 1686 { 1687 int i; 1688 Char** nfbuf = fbuf; 1689 int nfblocks = fblocks; 1690 1691 fblocks = 0; 1692 fbuf = NULL; 1693 for (i = 0; i < nfblocks; i++) 1694 xfree(nfbuf[i]); 1695 xfree(nfbuf); 1696 } 1697 cpybin(B, st->B); 1698 1699 xclose(SHIN); 1700 1701 insource = st->insource; 1702 SHIN = st->SHIN; 1703 if (st->OLDSTD != -1) 1704 xclose(OLDSTD), OLDSTD = st->OLDSTD; 1705 if (st->SHOUT != -1) 1706 xclose(SHOUT), SHOUT = st->SHOUT; 1707 if (st->SHDIAG != -1) 1708 xclose(SHDIAG), SHDIAG = st->SHDIAG; 1709 arginp = st->arginp; 1710 onelflg = st->onelflg; 1711 evalp = st->evalp; 1712 evalvec = st->evalvec; 1713 alvecp = st->alvecp; 1714 alvec = st->alvec; 1715 intty = st->intty; 1716 whyles = st->whyles; 1717 gointr = st->gointr; 1718 if (st->HIST != '\0') 1719 HIST = st->HIST; 1720 enterhist = st->enterhist; 1721 cantell = st->cantell; 1722 justpr = st->justpr; 1723 1724 if (st->argv != NULL) 1725 setq(STRargv, st->argv, &shvhed, VAR_READWRITE); 1726 else if (st->av != NULL && *st->av != NULL && adrof(STRargv) != NULL) 1727 unsetv(STRargv); 1728 } 1729 1730 /* 1731 * Source to a unit. If onlyown it must be our file or our group or 1732 * we don't chance it. This occurs on ".cshrc"s and the like. 1733 */ 1734 static void 1735 srcunit(int unit, int onlyown, int hflg, Char **av) 1736 { 1737 struct saved_state st; 1738 1739 st.SHIN = -1; /* st_restore checks this */ 1740 1741 if (unit < 0) 1742 return; 1743 1744 if (onlyown) { 1745 struct stat stb; 1746 1747 if (fstat(unit, &stb) < 0) { 1748 xclose(unit); 1749 return; 1750 } 1751 } 1752 1753 /* Does nothing before st_save() because st.SHIN == -1 */ 1754 cleanup_push(&st, st_restore); 1755 if (setintr) { 1756 pintr_disabled++; 1757 cleanup_push(&pintr_disabled, disabled_cleanup); 1758 } 1759 1760 /* Save the current state and move us to a new state */ 1761 st_save(&st, unit, hflg, NULL, av); 1762 1763 /* 1764 * Now if we are allowing commands to be interrupted, we let ourselves be 1765 * interrupted. 1766 */ 1767 if (setintr) { 1768 cleanup_until(&pintr_disabled); 1769 pintr_disabled++; 1770 cleanup_push(&pintr_disabled, disabled_cleanup); 1771 } 1772 1773 process(0); /* 0 -> blow away on errors */ 1774 1775 /* Restore the old state */ 1776 cleanup_until(&st); 1777 } 1778 1779 1780 /*ARGSUSED*/ 1781 void 1782 goodbye(Char **v, struct command *c) 1783 { 1784 USE(v); 1785 USE(c); 1786 record(); 1787 1788 if (loginsh) { 1789 size_t omark; 1790 sigset_t set; 1791 1792 sigemptyset(&set); 1793 signal(SIGQUIT, SIG_IGN); 1794 sigaddset(&set, SIGQUIT); 1795 sigprocmask(SIG_UNBLOCK, &set, NULL); 1796 signal(SIGINT, SIG_IGN); 1797 sigaddset(&set, SIGINT); 1798 signal(SIGTERM, SIG_IGN); 1799 sigaddset(&set, SIGTERM); 1800 signal(SIGHUP, SIG_IGN); 1801 sigaddset(&set, SIGHUP); 1802 sigprocmask(SIG_UNBLOCK, &set, NULL); 1803 phup_disabled = 1; 1804 setintr = 0; /* No interrupts after "logout" */ 1805 /* Trap errors inside .logout */ 1806 omark = cleanup_push_mark(); 1807 if (setexit() == 0) { 1808 if (!(adrof(STRlogout))) 1809 setcopy(STRlogout, STRnormal, VAR_READWRITE); 1810 #ifdef _PATH_DOTLOGOUT 1811 (void) srcfile(_PATH_DOTLOGOUT, 0, 0, NULL); 1812 #endif 1813 if (adrof(STRhome)) 1814 (void) srccat(varval(STRhome), STRsldtlogout); 1815 #ifdef TESLA 1816 do_logout = 1; 1817 #endif /* TESLA */ 1818 } 1819 cleanup_pop_mark(omark); 1820 } 1821 exitstat(); 1822 } 1823 1824 void 1825 exitstat(void) 1826 { 1827 #ifdef PROF 1828 _mcleanup(); 1829 #endif 1830 /* 1831 * Note that if STATUS is corrupted (i.e. getn bombs) then error will exit 1832 * directly because we poke child here. Otherwise we might continue 1833 * unwarrantedly (sic). 1834 */ 1835 child = 1; 1836 1837 xexit(getstatus()); 1838 } 1839 1840 /* 1841 * in the event of a HUP we want to save the history 1842 */ 1843 void 1844 phup(void) 1845 { 1846 static int again = 0; 1847 if (again++) 1848 return; 1849 1850 if (loginsh) { 1851 setcopy(STRlogout, STRhangup, VAR_READWRITE); 1852 #ifdef _PATH_DOTLOGOUT 1853 (void) srcfile(_PATH_DOTLOGOUT, 0, 0, NULL); 1854 #endif 1855 if (adrof(STRhome)) 1856 (void) srccat(varval(STRhome), STRsldtlogout); 1857 } 1858 1859 record(); 1860 1861 #ifdef POSIXJOBS 1862 /* 1863 * We kill the last foreground process group. It then becomes 1864 * responsible to propagate the SIGHUP to its progeny. 1865 */ 1866 { 1867 struct process *pp, *np; 1868 1869 for (pp = proclist.p_next; pp; pp = pp->p_next) { 1870 np = pp; 1871 /* 1872 * Find if this job is in the foreground. It could be that 1873 * the process leader has exited and the foreground flag 1874 * is cleared for it. 1875 */ 1876 do 1877 /* 1878 * If a process is in the foreground we try to kill 1879 * it's process group. If we succeed, then the 1880 * whole job is gone. Otherwise we keep going... 1881 * But avoid sending HUP to the shell again. 1882 */ 1883 if (((np->p_flags & PFOREGND) != 0) && np->p_jobid != shpgrp) { 1884 np->p_flags &= ~PHUP; 1885 if (killpg(np->p_jobid, SIGHUP) != -1) { 1886 /* In case the job was suspended... */ 1887 #ifdef SIGCONT 1888 (void) killpg(np->p_jobid, SIGCONT); 1889 #endif 1890 break; 1891 } 1892 } 1893 while ((np = np->p_friends) != pp); 1894 } 1895 } 1896 #endif /* POSIXJOBS */ 1897 1898 xexit(SIGHUP); 1899 } 1900 1901 static Char *jobargv[2] = {STRjobs, 0}; 1902 1903 /* 1904 * Catch an interrupt, e.g. during lexical input. 1905 * If we are an interactive shell, we reset the interrupt catch 1906 * immediately. In any case we drain the shell output, 1907 * and finally go through the normal error mechanism, which 1908 * gets a chance to make the shell go away. 1909 */ 1910 int just_signaled; /* bugfix by Michael Bloom (mg@ttidca.TTI.COM) */ 1911 1912 void 1913 pintr(void) 1914 { 1915 just_signaled = 1; 1916 pintr1(1); 1917 } 1918 1919 void 1920 pintr1(int wantnl) 1921 { 1922 if (setintr) { 1923 if (pjobs) { 1924 pjobs = 0; 1925 xputchar('\n'); 1926 dojobs(jobargv, NULL); 1927 stderror(ERR_NAME | ERR_INTR); 1928 } 1929 } 1930 /* MH - handle interrupted completions specially */ 1931 { 1932 if (InsideCompletion) 1933 stderror(ERR_SILENT); 1934 } 1935 /* JV - Make sure we shut off inputl */ 1936 { 1937 (void) Cookedmode(); 1938 GettingInput = 0; 1939 if (evalvec) 1940 doneinp = 1; 1941 } 1942 drainoline(); 1943 #ifdef HAVE_GETPWENT 1944 (void) endpwent(); 1945 #endif 1946 1947 /* 1948 * If we have an active "onintr" then we search for the label. Note that if 1949 * one does "onintr -" then we shan't be interruptible so we needn't worry 1950 * about that here. 1951 */ 1952 if (gointr) { 1953 gotolab(gointr); 1954 reset(); 1955 } 1956 else if (intty && wantnl) { 1957 if (editing) { 1958 /* 1959 * If we are editing a multi-line input command, and move to 1960 * the beginning of the line, we don't want to trash it when 1961 * we hit ^C 1962 */ 1963 PastBottom(); 1964 ClearLines(); 1965 ClearDisp(); 1966 } 1967 else { 1968 /* xputchar('\n'); *//* Some like this, others don't */ 1969 (void) putraw('\r'); 1970 (void) putraw('\n'); 1971 } 1972 } 1973 stderror(ERR_SILENT); 1974 } 1975 1976 /* 1977 * Process is the main driving routine for the shell. 1978 * It runs all command processing, except for those within { ... } 1979 * in expressions (which is run by a routine evalav in sh.exp.c which 1980 * is a stripped down process), and `...` evaluation which is run 1981 * also by a subset of this code in sh.glob.c in the routine backeval. 1982 * 1983 * The code here is a little strange because part of it is interruptible 1984 * and hence freeing of structures appears to occur when none is necessary 1985 * if this is ignored. 1986 * 1987 * Note that if catch is not set then we will unwind on any error. 1988 * If an end-of-file occurs, we return. 1989 */ 1990 void 1991 process(int catch) 1992 { 1993 jmp_buf_t osetexit; 1994 /* PWP: This might get nuked by longjmp so don't make it a register var */ 1995 size_t omark; 1996 volatile int didexitset = 0; 1997 1998 getexit(osetexit); 1999 omark = cleanup_push_mark(); 2000 for (;;) { 2001 struct command *t; 2002 int hadhist, old_pintr_disabled; 2003 2004 (void)setexit(); 2005 if (didexitset == 0) { 2006 exitset++; 2007 didexitset++; 2008 } 2009 pendjob(); 2010 2011 justpr = enterhist; /* execute if not entering history */ 2012 2013 if (haderr) { 2014 if (!catch) { 2015 /* unwind */ 2016 doneinp = 0; 2017 cleanup_pop_mark(omark); 2018 resexit(osetexit); 2019 reset(); 2020 } 2021 haderr = 0; 2022 /* 2023 * Every error is eventually caught here or the shell dies. It is 2024 * at this point that we clean up any left-over open files, by 2025 * closing all but a fixed number of pre-defined files. Thus 2026 * routines don't have to worry about leaving files open due to 2027 * deeper errors... they will get closed here. 2028 */ 2029 closem(); 2030 continue; 2031 } 2032 if (doneinp) { 2033 doneinp = 0; 2034 break; 2035 } 2036 if (chkstop) 2037 chkstop--; 2038 if (neednote) 2039 pnote(); 2040 if (intty && prompt && evalvec == 0) { 2041 just_signaled = 0; 2042 mailchk(); 2043 /* 2044 * Watch for logins/logouts. Next is scheduled commands stored 2045 * previously using "sched." Then execute periodic commands. 2046 * Following that, the prompt precmd is run. 2047 */ 2048 #ifndef HAVENOUTMP 2049 watch_login(0); 2050 #endif /* !HAVENOUTMP */ 2051 sched_run(); 2052 period_cmd(); 2053 precmd(); 2054 /* 2055 * If we are at the end of the input buffer then we are going to 2056 * read fresh stuff. Otherwise, we are rereading input and don't 2057 * need or want to prompt. 2058 */ 2059 if (fseekp == feobp && aret == TCSH_F_SEEK) 2060 printprompt(0, NULL); 2061 flush(); 2062 setalarm(1); 2063 } 2064 if (seterr) { 2065 xfree(seterr); 2066 seterr = NULL; 2067 } 2068 2069 /* 2070 * Interruptible during interactive reads 2071 */ 2072 if (setintr) 2073 pintr_push_enable(&old_pintr_disabled); 2074 freelex(¶ml); 2075 hadhist = lex(¶ml); 2076 if (setintr) 2077 cleanup_until(&old_pintr_disabled); 2078 cleanup_push(¶ml, lex_cleanup); 2079 2080 /* 2081 * Echo not only on VERBOSE, but also with history expansion. If there 2082 * is a lexical error then we forego history echo. 2083 * Do not echo if we're only entering history (source -h). 2084 */ 2085 if ((hadhist && !seterr && intty && !tellwhat && !Expand && !whyles) || 2086 (!enterhist && adrof(STRverbose))) 2087 { 2088 int odidfds = didfds; 2089 haderr = 1; 2090 didfds = 0; 2091 prlex(¶ml); 2092 flush(); 2093 haderr = 0; 2094 didfds = odidfds; 2095 } 2096 (void) alarm(0); /* Autologout OFF */ 2097 alrmcatch_disabled = 1; 2098 2099 /* 2100 * Save input text on the history list if reading in old history, or it 2101 * is from the terminal at the top level and not in a loop. 2102 * 2103 * PWP: entry of items in the history list while in a while loop is done 2104 * elsewhere... 2105 */ 2106 if (enterhist || (catch && intty && !whyles && !tellwhat && !arun)) 2107 savehist(¶ml, enterhist > 1); 2108 2109 if (Expand && seterr) 2110 Expand = 0; 2111 2112 /* 2113 * Print lexical error messages, except when sourcing history lists. 2114 */ 2115 if (!enterhist && seterr) 2116 stderror(ERR_OLD); 2117 2118 /* 2119 * If had a history command :p modifier then this is as far as we 2120 * should go 2121 */ 2122 if (justpr) 2123 goto cmd_done; 2124 2125 /* 2126 * If had a tellwhat from twenex() then do 2127 */ 2128 if (tellwhat) { 2129 (void) tellmewhat(¶ml, NULL); 2130 goto cmd_done; 2131 } 2132 2133 alias(¶ml); 2134 2135 #ifdef BSDJOBS 2136 /* 2137 * If we are interactive, try to continue jobs that we have stopped 2138 */ 2139 if (prompt) 2140 continue_jobs(¶ml); 2141 #endif /* BSDJOBS */ 2142 2143 /* 2144 * Check to see if the user typed "rm * .o" or something 2145 */ 2146 if (prompt) 2147 rmstar(¶ml); 2148 /* 2149 * Parse the words of the input into a parse tree. 2150 */ 2151 t = syntax(paraml.next, ¶ml, 0); 2152 /* 2153 * We cannot cleanup push here, because cd /blah; echo foo 2154 * would rewind t on the chdir error, and free the rest of the command 2155 */ 2156 if (seterr) { 2157 freesyn(t); 2158 stderror(ERR_OLD); 2159 } 2160 2161 postcmd(); 2162 /* 2163 * Execute the parse tree From: Michael Schroeder 2164 * <mlschroe@immd4.informatik.uni-erlangen.de> was execute(t, tpgrp); 2165 */ 2166 execute(t, (tpgrp > 0 ? tpgrp : -1), NULL, NULL, TRUE); 2167 freesyn(t); 2168 2169 /* 2170 * Made it! 2171 */ 2172 #ifdef SIG_WINDOW 2173 if (windowchg || (catch && intty && !whyles && !tellwhat)) { 2174 (void) check_window_size(0); /* for window systems */ 2175 } 2176 #endif /* SIG_WINDOW */ 2177 setcopy(STR_, InputBuf, VAR_READWRITE | VAR_NOGLOB); 2178 cmd_done: 2179 if (cleanup_reset()) 2180 cleanup_until(¶ml); 2181 else 2182 haderr = 1; 2183 } 2184 cleanup_pop_mark(omark); 2185 resexit(osetexit); 2186 exitset--; 2187 handle_pending_signals(); 2188 } 2189 2190 /*ARGSUSED*/ 2191 void 2192 dosource(Char **t, struct command *c) 2193 { 2194 Char *f; 2195 int hflg = 0; 2196 char *file; 2197 2198 USE(c); 2199 t++; 2200 if (*t && eq(*t, STRmh)) { 2201 if (*++t == NULL) 2202 stderror(ERR_NAME | ERR_HFLAG); 2203 hflg++; 2204 } 2205 else if (*t && eq(*t, STRmm)) { 2206 if (*++t == NULL) 2207 stderror(ERR_NAME | ERR_MFLAG); 2208 hflg = 2; 2209 } 2210 2211 f = globone(*t++, G_ERROR); 2212 file = strsave(short2str(f)); 2213 cleanup_push(file, xfree); 2214 xfree(f); 2215 t = glob_all_or_error(t); 2216 cleanup_push(t, blk_cleanup); 2217 if ((!srcfile(file, 0, hflg, t)) && (!hflg) && (!bequiet)) 2218 stderror(ERR_SYSTEM, file, strerror(errno)); 2219 cleanup_until(file); 2220 } 2221 2222 /* 2223 * Check for mail. 2224 * If we are a login shell, then we don't want to tell 2225 * about any mail file unless its been modified 2226 * after the time we started. 2227 * This prevents us from telling the user things he already 2228 * knows, since the login program insists on saying 2229 * "You have mail." 2230 */ 2231 2232 /* 2233 * The AMS version. 2234 * This version checks if the file is a directory, and if so, 2235 * tells you the number of files in it, otherwise do the old thang. 2236 * The magic "+1" in the time calculation is to compensate for 2237 * an AFS bug where directory mtimes are set to 1 second in 2238 * the future. 2239 */ 2240 2241 static void 2242 mailchk(void) 2243 { 2244 struct varent *v; 2245 Char **vp; 2246 time_t t; 2247 int intvl, cnt; 2248 struct stat stb; 2249 int new; 2250 2251 v = adrof(STRmail); 2252 if (v == NULL || v->vec == NULL) 2253 return; 2254 (void) time(&t); 2255 vp = v->vec; 2256 cnt = blklen(vp); 2257 intvl = (cnt && number(*vp)) ? (--cnt, getn(*vp++)) : MAILINTVL; 2258 if (intvl < 1) 2259 intvl = 1; 2260 if (chktim + intvl > t) 2261 return; 2262 for (; *vp; vp++) { 2263 char *filename = short2str(*vp); 2264 char *mboxdir = filename; 2265 2266 if (stat(filename, &stb) < 0) 2267 continue; 2268 #if defined(BSDTIMES) || defined(_SEQUENT_) 2269 new = stb.st_mtime > time0.tv_sec; 2270 #else 2271 new = stb.st_mtime > seconds0; 2272 #endif 2273 if (S_ISDIR(stb.st_mode)) { 2274 DIR *mailbox; 2275 int mailcount = 0; 2276 char *tempfilename; 2277 struct stat stc; 2278 2279 tempfilename = xasprintf("%s/new", filename); 2280 2281 if (stat(tempfilename, &stc) != -1 && S_ISDIR(stc.st_mode)) { 2282 /* 2283 * "filename/new" exists and is a directory; you are 2284 * using Qmail. 2285 */ 2286 stb = stc; 2287 #if defined(BSDTIMES) || defined(_SEQUENT_) 2288 new = stb.st_mtime > time0.tv_sec; 2289 #else 2290 new = stb.st_mtime > seconds0; 2291 #endif 2292 mboxdir = tempfilename; 2293 } 2294 2295 if (stb.st_mtime <= chktim + 1 || (loginsh && !new)) { 2296 xfree(tempfilename); 2297 continue; 2298 } 2299 2300 mailbox = opendir(mboxdir); 2301 xfree(tempfilename); 2302 if (mailbox == NULL) 2303 continue; 2304 2305 /* skip . and .. */ 2306 if (!readdir(mailbox) || !readdir(mailbox)) { 2307 (void)closedir(mailbox); 2308 continue; 2309 } 2310 2311 while (readdir(mailbox)) 2312 mailcount++; 2313 2314 (void)closedir(mailbox); 2315 if (mailcount == 0) 2316 continue; 2317 2318 if (cnt == 1) 2319 xprintf(CGETS(11, 3, "You have %d mail messages.\n"), 2320 mailcount); 2321 else 2322 xprintf(CGETS(11, 4, "You have %d mail messages in %s.\n"), 2323 mailcount, filename); 2324 } 2325 else { 2326 char *type; 2327 2328 if (stb.st_size == 0 || stb.st_atime >= stb.st_mtime || 2329 (stb.st_atime <= chktim && stb.st_mtime <= chktim) || 2330 (loginsh && !new)) 2331 continue; 2332 type = strsave(new ? CGETS(11, 6, "new ") : ""); 2333 cleanup_push(type, xfree); 2334 if (cnt == 1) 2335 xprintf(CGETS(11, 5, "You have %smail.\n"), type); 2336 else 2337 xprintf(CGETS(11, 7, "You have %smail in %s.\n"), type, filename); 2338 cleanup_until(type); 2339 } 2340 } 2341 chktim = t; 2342 } 2343 2344 /* 2345 * Extract a home directory from the password file 2346 * The argument points to a buffer where the name of the 2347 * user whose home directory is sought is currently. 2348 * We return home directory of the user, or NULL. 2349 */ 2350 Char * 2351 gethdir(const Char *home) 2352 { 2353 Char *h; 2354 2355 /* 2356 * Is it us? 2357 */ 2358 if (*home == '\0') { 2359 if ((h = varval(STRhome)) != STRNULL) 2360 return Strsave(h); 2361 else 2362 return NULL; 2363 } 2364 2365 /* 2366 * Look in the cache 2367 */ 2368 if ((h = gettilde(home)) == NULL) 2369 return NULL; 2370 else 2371 return Strsave(h); 2372 } 2373 2374 /* 2375 * Move the initial descriptors to their eventual 2376 * resting places, closing all other units. 2377 */ 2378 void 2379 initdesc(void) 2380 { 2381 #ifdef NLS_BUGS 2382 #ifdef NLS_CATALOGS 2383 nlsclose(); 2384 #endif /* NLS_CATALOGS */ 2385 #endif /* NLS_BUGS */ 2386 2387 2388 didfds = 0; /* 0, 1, 2 aren't set up */ 2389 (void) close_on_exec(SHIN = dcopy(0, FSHIN), 1); 2390 (void) close_on_exec(SHOUT = dcopy(1, FSHOUT), 1); 2391 (void) close_on_exec(SHDIAG = dcopy(2, FSHDIAG), 1); 2392 (void) close_on_exec(OLDSTD = dcopy(SHIN, FOLDSTD), 1); 2393 #ifndef CLOSE_ON_EXEC 2394 didcch = 0; /* Havent closed for child */ 2395 #endif /* CLOSE_ON_EXEC */ 2396 if (SHDIAG >= 0) 2397 isdiagatty = isatty(SHDIAG); 2398 else 2399 isdiagatty = 0; 2400 if (SHDIAG >= 0) 2401 isoutatty = isatty(SHOUT); 2402 else 2403 isoutatty = 0; 2404 #ifdef NLS_BUGS 2405 #ifdef NLS_CATALOGS 2406 nlsinit(); 2407 #endif /* NLS_CATALOGS */ 2408 #endif /* NLS_BUGS */ 2409 } 2410 2411 2412 void 2413 #ifdef PROF 2414 done(int i) 2415 #else 2416 xexit(int i) 2417 #endif 2418 { 2419 #ifdef TESLA 2420 if (loginsh && do_logout) { 2421 /* this is to send hangup signal to the develcon */ 2422 /* we toggle DTR. clear dtr - sleep 1 - set dtr */ 2423 /* ioctl will return ENOTTY for pty's but we ignore it */ 2424 /* exitstat will run after disconnect */ 2425 /* we sleep for 2 seconds to let things happen in */ 2426 /* .logout and rechist() */ 2427 #ifdef TIOCCDTR 2428 (void) sleep(2); 2429 (void) ioctl(FSHTTY, TIOCCDTR, NULL); 2430 (void) sleep(1); 2431 (void) ioctl(FSHTTY, TIOCSDTR, NULL); 2432 #endif /* TIOCCDTR */ 2433 } 2434 #endif /* TESLA */ 2435 2436 { 2437 struct process *pp, *np; 2438 pid_t mypid = getpid(); 2439 /* Kill all processes marked for hup'ing */ 2440 for (pp = proclist.p_next; pp; pp = pp->p_next) { 2441 np = pp; 2442 do 2443 if ((np->p_flags & PHUP) && np->p_jobid != shpgrp && 2444 np->p_parentid == mypid) { 2445 if (killpg(np->p_jobid, SIGHUP) != -1) { 2446 /* In case the job was suspended... */ 2447 #ifdef SIGCONT 2448 (void) killpg(np->p_jobid, SIGCONT); 2449 #endif 2450 break; 2451 } 2452 } 2453 while ((np = np->p_friends) != pp); 2454 } 2455 } 2456 untty(); 2457 #ifdef NLS_CATALOGS 2458 /* 2459 * We need to call catclose, because SVR4 leaves symlinks behind otherwise 2460 * in the catalog directories. We cannot close on a vforked() child, 2461 * because messages will stop working on the parent too. 2462 */ 2463 if (child == 0) 2464 nlsclose(); 2465 #endif /* NLS_CATALOGS */ 2466 #ifdef WINNT_NATIVE 2467 nt_cleanup(); 2468 #endif /* WINNT_NATIVE */ 2469 _exit(i); 2470 } 2471 2472 #ifndef _PATH_DEFPATH 2473 static Char ** 2474 defaultpath(void) 2475 { 2476 char *ptr; 2477 Char **blk, **blkp; 2478 struct stat stb; 2479 2480 blkp = blk = xmalloc(sizeof(Char *) * 10); 2481 2482 #ifndef NODOT 2483 # ifndef DOTLAST 2484 *blkp++ = Strsave(STRdot); 2485 # endif 2486 #endif 2487 2488 #define DIRAPPEND(a) \ 2489 if (stat(ptr = a, &stb) == 0 && S_ISDIR(stb.st_mode)) \ 2490 *blkp++ = SAVE(ptr) 2491 2492 #ifdef _PATH_LOCAL 2493 DIRAPPEND(_PATH_LOCAL); 2494 #endif 2495 2496 #ifdef _PATH_USRUCB 2497 DIRAPPEND(_PATH_USRUCB); 2498 #endif 2499 2500 #ifdef _PATH_USRBSD 2501 DIRAPPEND(_PATH_USRBSD); 2502 #endif 2503 2504 #ifdef _PATH_BIN 2505 DIRAPPEND(_PATH_BIN); 2506 #endif 2507 2508 #ifdef _PATH_USRBIN 2509 DIRAPPEND(_PATH_USRBIN); 2510 #endif 2511 2512 #undef DIRAPPEND 2513 2514 #ifndef NODOT 2515 # ifdef DOTLAST 2516 *blkp++ = Strsave(STRdot); 2517 # endif 2518 #endif 2519 *blkp = NULL; 2520 return (blk); 2521 } 2522 #endif 2523 2524 static void 2525 record(void) 2526 { 2527 static int again = 0; 2528 int ophup_disabled; 2529 2530 if (again++) 2531 return; 2532 2533 ophup_disabled = phup_disabled; 2534 phup_disabled = 1; 2535 if (!fast) { 2536 recdirs(NULL, adrof(STRsavedirs) != NULL); 2537 rechist(NULL, adrof(STRsavehist) != NULL); 2538 } 2539 displayHistStats("Exiting"); /* no-op unless DEBUG_HIST */ 2540 phup_disabled = ophup_disabled; 2541 } 2542 2543 /* 2544 * Grab the tty repeatedly, and give up if we are not in the correct 2545 * tty process group. 2546 */ 2547 int 2548 grabpgrp(int fd, pid_t desired) 2549 { 2550 struct sigaction old; 2551 pid_t pgrp; 2552 size_t i; 2553 2554 for (i = 0; i < 100; i++) { 2555 if ((pgrp = tcgetpgrp(fd)) == -1) 2556 return -1; 2557 if (pgrp == desired) 2558 return 0; 2559 (void)sigaction(SIGTTIN, NULL, &old); 2560 (void)signal(SIGTTIN, SIG_DFL); 2561 (void)kill(0, SIGTTIN); 2562 (void)sigaction(SIGTTIN, &old, NULL); 2563 } 2564 errno = EPERM; 2565 return -1; 2566 } 2567