1 /* $Header: /p/tcsh/cvsroot/tcsh/sh.c,v 3.189 2016/09/12 16:33:54 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 3.189 2016/09/12 16:33:54 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 IZERO_STRUCT; 82 struct wordent paraml IZERO_STRUCT; 83 84 static const char tcshstr[] = "tcsh"; 85 86 struct sigaction parintr; /* Parents interrupt catch */ 87 struct sigaction parterm; /* Parents terminate catch */ 88 89 #ifdef TESLA 90 int do_logout = 0; 91 #endif /* TESLA */ 92 93 94 int use_fork = 0; /* use fork() instead of vfork()? */ 95 96 /* 97 * Magic pointer values. Used to specify other invalid conditions aside 98 * from null. 99 */ 100 static Char INVCHAR; 101 Char *INVPTR = &INVCHAR; 102 Char **INVPPTR = &INVPTR; 103 104 static int fast = 0; 105 static int mflag = 0; 106 static int prompt = 1; 107 int enterhist = 0; 108 int tellwhat = 0; 109 time_t t_period; 110 Char *ffile = NULL; 111 int dolzero = 0; 112 int insource = 0; 113 int exitset = 0; 114 static time_t chktim; /* Time mail last checked */ 115 char *progname; 116 int tcsh; 117 118 /* 119 * This preserves the input state of the shell. It is used by 120 * st_save and st_restore to manupulate shell state. 121 */ 122 struct saved_state { 123 int insource; 124 int OLDSTD; 125 int SHIN; 126 int SHOUT; 127 int SHDIAG; 128 int intty; 129 struct whyle *whyles; 130 Char *gointr; 131 Char *arginp; 132 Char *evalp; 133 Char **evalvec; 134 Char *alvecp; 135 Char **alvec; 136 int onelflg; 137 int enterhist; 138 Char **argv; 139 Char **av; 140 Char HIST; 141 int cantell; 142 struct Bin B; 143 int justpr; 144 }; 145 146 static int srccat (Char *, Char *); 147 #ifndef WINNT_NATIVE 148 static int srcfile (const char *, int, int, Char **); 149 #else 150 int srcfile (const char *, int, int, Char **); 151 #endif /*WINNT_NATIVE*/ 152 static void srcunit (int, int, int, Char **); 153 static void mailchk (void); 154 #ifndef _PATH_DEFPATH 155 static Char **defaultpath (void); 156 #endif 157 static void record (void); 158 static void st_save (struct saved_state *, int, int, 159 Char **, Char **); 160 static void st_restore (void *); 161 162 int main (int, char **); 163 164 #ifndef LOCALEDIR 165 #define LOCALEDIR "/usr/share/locale" 166 #endif 167 168 #ifdef NLS_CATALOGS 169 static void 170 add_localedir_to_nlspath(const char *path) 171 { 172 static const char msgs_LOC[] = "/%L/LC_MESSAGES/%N.cat"; 173 static const char msgs_lang[] = "/%l/LC_MESSAGES/%N.cat"; 174 char *old; 175 char *new, *new_p; 176 size_t len; 177 int add_LOC = 1; 178 int add_lang = 1; 179 char trypath[MAXPATHLEN]; 180 struct stat st; 181 182 if (path == NULL) 183 return; 184 185 (void) xsnprintf(trypath, sizeof(trypath), "%s/en/LC_MESSAGES/tcsh.cat", 186 path); 187 if (stat(trypath, &st) == -1) 188 return; 189 190 if ((old = getenv("NLSPATH")) != NULL) 191 len = strlen(old) + 1; /* don't forget the colon. */ 192 else 193 len = 0; 194 195 len += 2 * strlen(path) + 196 sizeof(msgs_LOC) + sizeof(msgs_lang); /* includes the extra colon */ 197 198 new = new_p = xcalloc(len, 1); 199 200 if (old != NULL) { 201 size_t pathlen = strlen(path); 202 char *old_p; 203 204 (void) xsnprintf(new_p, len, "%s", old); 205 new_p += strlen(new_p); 206 len -= new_p - new; 207 208 /* Check if the paths we try to add are already present in NLSPATH. 209 If so, note it by setting the appropriate flag to 0. */ 210 for (old_p = old; old_p; old_p = strchr(old_p, ':'), 211 old_p = old_p ? old_p + 1 : NULL) { 212 if (strncmp(old_p, path, pathlen) != 0) 213 continue; 214 if (strncmp(old_p + pathlen, msgs_LOC, sizeof(msgs_LOC) - 1) == 0) 215 add_LOC = 0; 216 else if (strncmp(old_p + pathlen, msgs_lang, 217 sizeof(msgs_lang) - 1) == 0) 218 add_lang = 0; 219 } 220 } 221 222 /* Add the message catalog paths not already present to NLSPATH. */ 223 if (add_LOC || add_lang) 224 (void) xsnprintf(new_p, len, "%s%s%s%s%s%s", 225 old ? ":" : "", 226 add_LOC ? path : "", add_LOC ? msgs_LOC : "", 227 add_LOC && add_lang ? ":" : "", 228 add_lang ? path : "", add_lang ? msgs_lang : ""); 229 230 tsetenv(STRNLSPATH, str2short(new)); 231 free(new); 232 } 233 #endif 234 235 int 236 main(int argc, char **argv) 237 { 238 int batch = 0; 239 volatile int nexececho = 0; 240 int nofile = 0; 241 volatile int nverbose = 0; 242 volatile int rdirs = 0; 243 int quitit = 0; 244 Char *cp; 245 #ifdef AUTOLOGOUT 246 Char *cp2; 247 #endif 248 char *tcp, *ttyn; 249 int f, reenter; 250 char **tempv; 251 const char *targinp = NULL; 252 int osetintr; 253 struct sigaction oparintr; 254 255 #ifdef WINNT_NATIVE 256 nt_init(); 257 #endif /* WINNT_NATIVE */ 258 259 (void)memset(&reslab, 0, sizeof(reslab)); 260 #if defined(NLS_CATALOGS) && defined(LC_MESSAGES) 261 (void) setlocale(LC_MESSAGES, ""); 262 #endif /* NLS_CATALOGS && LC_MESSAGES */ 263 264 #ifdef NLS 265 # ifdef LC_CTYPE 266 (void) setlocale(LC_CTYPE, ""); /* for iscntrl */ 267 # endif /* LC_CTYPE */ 268 #endif /* NLS */ 269 270 STR_environ = blk2short(environ); 271 environ = short2blk(STR_environ); /* So that we can free it */ 272 273 #ifdef NLS_CATALOGS 274 add_localedir_to_nlspath(LOCALEDIR); 275 #endif 276 277 nlsinit(); 278 initlex(¶ml); 279 280 #ifdef MALLOC_TRACE 281 mal_setstatsfile(fdopen(dmove(xopen("/tmp/tcsh.trace", 282 O_WRONLY|O_CREAT|O_LARGEFILE, 0666), 25), "w")); 283 mal_trace(1); 284 #endif /* MALLOC_TRACE */ 285 286 #if !(defined(BSDTIMES) || defined(_SEQUENT_)) && defined(POSIX) 287 # ifdef _SC_CLK_TCK 288 clk_tck = (clock_t) sysconf(_SC_CLK_TCK); 289 # else /* ! _SC_CLK_TCK */ 290 # ifdef CLK_TCK 291 clk_tck = CLK_TCK; 292 # else /* !CLK_TCK */ 293 clk_tck = HZ; 294 # endif /* CLK_TCK */ 295 # endif /* _SC_CLK_TCK */ 296 #endif /* !BSDTIMES && POSIX */ 297 298 settimes(); /* Immed. estab. timing base */ 299 #ifdef TESLA 300 do_logout = 0; 301 #endif /* TESLA */ 302 303 /* 304 * Make sure we have 0, 1, 2 open 305 * Otherwise `` jobs will not work... (From knaff@poly.polytechnique.fr) 306 */ 307 { 308 do 309 if ((f = xopen(_PATH_DEVNULL, O_RDONLY|O_LARGEFILE)) == -1 && 310 (f = xopen("/", O_RDONLY|O_LARGEFILE)) == -1) 311 exit(1); 312 while (f < 3); 313 xclose(f); 314 } 315 316 osinit(); /* Os dependent initialization */ 317 318 319 { 320 char *t; 321 322 t = strrchr(argv[0], '/'); 323 #ifdef WINNT_NATIVE 324 { 325 char *s = strrchr(argv[0], '\\'); 326 if (s) 327 t = s; 328 } 329 #endif /* WINNT_NATIVE */ 330 t = t ? t + 1 : argv[0]; 331 if (*t == '-') t++; 332 progname = strsave((t && *t) ? t : tcshstr); /* never want a null */ 333 tcsh = strncmp(progname, tcshstr, sizeof(tcshstr) - 1) == 0; 334 } 335 336 /* 337 * Initialize non constant strings 338 */ 339 #ifdef _PATH_BSHELL 340 STR_BSHELL = SAVE(_PATH_BSHELL); 341 #endif 342 #ifdef _PATH_TCSHELL 343 STR_SHELLPATH = SAVE(_PATH_TCSHELL); 344 #else 345 # ifdef _PATH_CSHELL 346 STR_SHELLPATH = SAVE(_PATH_CSHELL); 347 # endif 348 #endif 349 STR_WORD_CHARS = SAVE(WORD_CHARS); 350 STR_WORD_CHARS_VI = SAVE(WORD_CHARS_VI); 351 352 HIST = '!'; 353 HISTSUB = '^'; 354 PRCH = tcsh ? '>' : '%'; /* to replace %# in $prompt for normal users */ 355 PRCHROOT = '#'; /* likewise for root */ 356 word_chars = STR_WORD_CHARS; 357 bslash_quote = 0; /* PWP: do tcsh-style backslash quoting? */ 358 anyerror = 1; /* for compatibility */ 359 setcopy(STRanyerror, STRNULL, VAR_READWRITE); 360 361 /* Default history size to 100 */ 362 setcopy(STRhistory, str2short("100"), VAR_READWRITE); 363 sethistory(100); 364 365 tempv = argv; 366 ffile = SAVE(tempv[0]); 367 dolzero = 0; 368 if (eq(ffile, STRaout)) /* A.out's are quittable */ 369 quitit = 1; 370 uid = getuid(); 371 gid = getgid(); 372 euid = geteuid(); 373 egid = getegid(); 374 /* 375 * We are a login shell if: 1. we were invoked as -<something> with 376 * optional arguments 2. or we were invoked only with the -l flag 377 */ 378 loginsh = (**tempv == '-') || (argc == 2 && 379 tempv[1][0] == '-' && tempv[1][1] == 'l' && 380 tempv[1][2] == '\0'); 381 #ifdef _VMS_POSIX 382 /* No better way to find if we are a login shell */ 383 if (!loginsh) { 384 loginsh = (argc == 1 && getppid() == 1); 385 **tempv = '-'; /* Avoid giving VMS an acidic stomach */ 386 } 387 #endif /* _VMS_POSIX */ 388 389 if (loginsh && **tempv != '-') { 390 char *argv0; 391 392 /* 393 * Mangle the argv space 394 */ 395 tempv[1][0] = '\0'; 396 tempv[1][1] = '\0'; 397 tempv[1] = NULL; 398 argv0 = strspl("-", *tempv); 399 *tempv = argv0; 400 argc--; 401 } 402 if (loginsh) { 403 (void) time(&chktim); 404 setNS(STRloginsh); 405 } 406 407 NoNLSRebind = getenv("NOREBIND") != NULL; 408 #ifdef NLS 409 # ifdef SETLOCALEBUG 410 dont_free = 1; 411 # endif /* SETLOCALEBUG */ 412 (void) setlocale(LC_ALL, ""); 413 # ifdef LC_COLLATE 414 (void) setlocale(LC_COLLATE, ""); 415 # endif 416 # ifdef SETLOCALEBUG 417 dont_free = 0; 418 # endif /* SETLOCALEBUG */ 419 # ifdef STRCOLLBUG 420 fix_strcoll_bug(); 421 # endif /* STRCOLLBUG */ 422 423 /* 424 * On solaris ISO8859-1 contains no printable characters in the upper half 425 * so we need to test only for MB_CUR_MAX == 1, otherwise for multi-byte 426 * locales we are always AsciiOnly == 0. 427 */ 428 if (MB_CUR_MAX == 1) { 429 int k; 430 431 for (k = 0200; k <= 0377 && !isprint(CTL_ESC(k)); k++) 432 continue; 433 AsciiOnly = k > 0377; 434 } else 435 AsciiOnly = 0; 436 #else 437 AsciiOnly = getenv("LANG") == NULL && getenv("LC_CTYPE") == NULL; 438 #endif /* NLS */ 439 if (MapsAreInited && !NLSMapsAreInited) 440 ed_InitNLSMaps(); 441 ResetArrowKeys(); 442 443 /* 444 * Initialize for periodic command intervals. Also, initialize the dummy 445 * tty list for login-watch. 446 */ 447 (void) time(&t_period); 448 #ifndef HAVENOUTMP 449 initwatch(); 450 #endif /* !HAVENOUTMP */ 451 452 #if defined(alliant) 453 /* 454 * From: Jim Pace <jdp@research.att.com> 455 * tcsh does not work properly on the alliants through an rlogin session. 456 * The shell generally hangs. Also, reference to the controlling terminal 457 * does not work ( ie: echo foo > /dev/tty ). 458 * 459 * A security feature was added to rlogind affecting FX/80's Concentrix 460 * from revision 5.5.xx upwards (through 5.7 where this fix was implemented) 461 * This security change also affects the FX/2800 series. 462 * The security change to rlogind requires the process group of an rlogin 463 * session become disassociated with the tty in rlogind. 464 * 465 * The changes needed are: 466 * 1. set the process group 467 * 2. reenable the control terminal 468 */ 469 if (loginsh && isatty(SHIN)) { 470 ttyn = ttyname(SHIN); 471 xclose(SHIN); 472 SHIN = xopen(ttyn, O_RDWR|O_LARGEFILE); 473 shpgrp = getpid(); 474 (void) ioctl (SHIN, TIOCSPGRP, (ioctl_t) &shpgrp); 475 (void) setpgid(0, shpgrp); 476 } 477 #endif /* alliant */ 478 479 /* 480 * Move the descriptors to safe places. The variable didfds is 0 while we 481 * have only FSH* to work with. When didfds is true, we have 0,1,2 and 482 * prefer to use these. 483 */ 484 initdesc(); 485 486 cdtohome = 1; 487 setv(STRcdtohome, SAVE(""), VAR_READWRITE); 488 489 /* 490 * Get and set the tty now 491 */ 492 if ((ttyn = ttyname(SHIN)) != NULL) { 493 /* 494 * Could use rindex to get rid of other possible path components, but 495 * hpux preserves the subdirectory /pty/ when storing the tty name in 496 * utmp, so we keep it too. 497 */ 498 if (strncmp(ttyn, "/dev/", 5) == 0) 499 setv(STRtty, cp = SAVE(ttyn + 5), VAR_READWRITE); 500 else 501 setv(STRtty, cp = SAVE(ttyn), VAR_READWRITE); 502 } 503 else 504 setv(STRtty, cp = SAVE(""), VAR_READWRITE); 505 506 /* 507 * Initialize the shell variables. ARGV and PROMPT are initialized later. 508 * STATUS is also munged in several places. CHILD is munged when 509 * forking/waiting 510 */ 511 512 /* 513 * 7-10-87 Paul Placeway autologout should be set ONLY on login shells and 514 * on shells running as root. Out of these, autologout should NOT be set 515 * for any psudo-terminals (this catches most window systems) and not for 516 * any terminal running X windows. 517 * 518 * At Ohio State, we have had problems with a user having his X session 519 * drop out from under him (on a Sun) because the shell in his master 520 * xterm timed out and exited. 521 * 522 * Really, this should be done with a program external to the shell, that 523 * watches for no activity (and NO running programs, such as dump) on a 524 * terminal for a long peroid of time, and then SIGHUPS the shell on that 525 * terminal. 526 * 527 * bugfix by Rich Salz <rsalz@PINEAPPLE.BBN.COM>: For root rsh things 528 * allways first check to see if loginsh or really root, then do things 529 * with ttyname() 530 * 531 * Also by Jean-Francois Lamy <lamy%ai.toronto.edu@RELAY.CS.NET>: check the 532 * value of cp before using it! ("root can rsh too") 533 * 534 * PWP: keep the nested ifs; the order of the tests matters and a good 535 * (smart) C compiler might re-arange things wrong. 536 */ 537 #ifdef AUTOLOGOUT 538 # ifdef convex 539 if (uid == 0) 540 /* root always has a 15 minute autologout */ 541 setcopy(STRautologout, STRrootdefautologout, VAR_READWRITE); 542 else 543 if (loginsh) 544 /* users get autologout set to 0 */ 545 setcopy(STRautologout, STR0, VAR_READWRITE); 546 # else /* convex */ 547 if (loginsh || (uid == 0)) { 548 if (*cp) { 549 /* only for login shells or root and we must have a tty */ 550 if (((cp2 = Strrchr(cp, (Char) '/')) != NULL) && 551 (Strncmp(cp, STRptssl, 3) != 0)) { 552 cp2 = cp2 + 1; 553 } 554 else 555 cp2 = cp; 556 if (!(((Strncmp(cp2, STRtty, 3) == 0) && Isalpha(cp2[3])) || 557 Strstr(cp, STRptssl) != NULL)) { 558 if (getenv("DISPLAY") == NULL) { 559 /* NOT on X window shells */ 560 setcopy(STRautologout, STRdefautologout, VAR_READWRITE); 561 } 562 } 563 } 564 } 565 # endif /* convex */ 566 #endif /* AUTOLOGOUT */ 567 568 sigset_interrupting(SIGALRM, queue_alrmcatch); 569 570 setcopy(STRstatus, STR0, VAR_READWRITE); 571 572 /* 573 * get and set machine specific environment variables 574 */ 575 getmachine(); 576 577 578 /* 579 * Publish the selected echo style 580 */ 581 #if ECHO_STYLE != BSD_ECHO 582 if (tcsh) { 583 # if ECHO_STYLE == NONE_ECHO 584 setcopy(STRecho_style, STRnone, VAR_READWRITE); 585 # endif /* ECHO_STYLE == NONE_ECHO */ 586 # if ECHO_STYLE == SYSV_ECHO 587 setcopy(STRecho_style, STRsysv, VAR_READWRITE); 588 # endif /* ECHO_STYLE == SYSV_ECHO */ 589 # if ECHO_STYLE == BOTH_ECHO 590 setcopy(STRecho_style, STRboth, VAR_READWRITE); 591 # endif /* ECHO_STYLE == BOTH_ECHO */ 592 } else 593 #endif /* ECHO_STYLE != BSD_ECHO */ 594 setcopy(STRecho_style, STRbsd, VAR_READWRITE); 595 596 /* 597 * increment the shell level. 598 */ 599 shlvl(1); 600 601 #ifdef __ANDROID__ 602 /* On Android, $HOME either isn't set or set to /data, a R/O location. 603 Check for the environment variable EXTERNAL_STORAGE, which contains 604 the mount point of the external storage (SD card, mostly). If 605 EXTERNAL_STORAGE isn't set fall back to "/sdcard". Eventually 606 override $HOME so the environment is on the same page. */ 607 if (((tcp = getenv("HOME")) != NULL && strcmp (tcp, "/data") != 0) 608 || (tcp = getenv("EXTERNAL_STORAGE")) != NULL) { 609 cp = quote(SAVE(tcp)); 610 } else 611 cp = quote(SAVE("/sdcard")); 612 tsetenv(STRKHOME, cp); 613 #else 614 if ((tcp = getenv("HOME")) != NULL) 615 cp = quote(SAVE(tcp)); 616 else 617 cp = NULL; 618 #endif 619 620 if (cp == NULL) 621 fast = 1; /* No home -> can't read scripts */ 622 else 623 setv(STRhome, cp, VAR_READWRITE); 624 625 dinit(cp); /* dinit thinks that HOME == cwd in a login 626 * shell */ 627 /* 628 * Grab other useful things from the environment. Should we grab 629 * everything?? 630 */ 631 { 632 char *cln, *cus, *cgr; 633 struct passwd *pw; 634 struct group *gr; 635 636 637 #ifdef apollo 638 int oid = getoid(); 639 640 setv(STRoid, Itoa(oid, 0, 0), VAR_READWRITE); 641 #endif /* apollo */ 642 643 setv(STReuid, Itoa(euid, 0, 0), VAR_READWRITE); 644 if ((pw = xgetpwuid(euid)) == NULL) 645 setcopy(STReuser, STRunknown, VAR_READWRITE); 646 else 647 setcopy(STReuser, str2short(pw->pw_name), VAR_READWRITE); 648 649 setv(STRuid, Itoa(uid, 0, 0), VAR_READWRITE); 650 651 setv(STRgid, Itoa(gid, 0, 0), VAR_READWRITE); 652 653 cln = getenv("LOGNAME"); 654 cus = getenv("USER"); 655 if (cus != NULL) 656 setv(STRuser, quote(SAVE(cus)), VAR_READWRITE); 657 else if (cln != NULL) 658 setv(STRuser, quote(SAVE(cln)), VAR_READWRITE); 659 else if ((pw = xgetpwuid(uid)) == NULL) 660 setcopy(STRuser, STRunknown, VAR_READWRITE); 661 else 662 setcopy(STRuser, str2short(pw->pw_name), VAR_READWRITE); 663 if (cln == NULL) 664 tsetenv(STRLOGNAME, varval(STRuser)); 665 if (cus == NULL) 666 tsetenv(STRKUSER, varval(STRuser)); 667 668 cgr = getenv("GROUP"); 669 if (cgr != NULL) 670 setv(STRgroup, quote(SAVE(cgr)), VAR_READWRITE); 671 else if ((gr = xgetgrgid(gid)) == NULL) 672 setcopy(STRgroup, STRunknown, VAR_READWRITE); 673 else 674 setcopy(STRgroup, str2short(gr->gr_name), VAR_READWRITE); 675 if (cgr == NULL) 676 tsetenv(STRKGROUP, varval(STRgroup)); 677 } 678 679 /* 680 * HOST may be wrong, since rexd transports the entire environment on sun 681 * 3.x Just set it again 682 */ 683 { 684 char cbuff[MAXHOSTNAMELEN]; 685 686 if (gethostname(cbuff, sizeof(cbuff)) >= 0) { 687 cbuff[sizeof(cbuff) - 1] = '\0'; /* just in case */ 688 tsetenv(STRHOST, str2short(cbuff)); 689 } 690 else 691 tsetenv(STRHOST, STRunknown); 692 } 693 694 695 #ifdef REMOTEHOST 696 /* 697 * Try to determine the remote host we were logged in from. 698 */ 699 remotehost(); 700 #endif /* REMOTEHOST */ 701 702 #ifdef apollo 703 if ((tcp = getenv("SYSTYPE")) == NULL) 704 tcp = "bsd4.3"; 705 tsetenv(STRSYSTYPE, quote(str2short(tcp))); 706 #endif /* apollo */ 707 708 /* 709 * set editing on by default, unless running under Emacs as an inferior 710 * shell. 711 * We try to do this intelligently. If $TERM is available, then it 712 * should determine if we should edit or not. $TERM is preserved 713 * across rlogin sessions, so we will not get confused if we rlogin 714 * under an emacs shell. Another advantage is that if we run an 715 * xterm under an emacs shell, then the $TERM will be set to 716 * xterm, so we are going to want to edit. Unfortunately emacs 717 * does not restore all the tty modes, so xterm is not very well 718 * set up. But this is not the shell's fault. 719 * Also don't edit if $TERM == wm, for when we're running under an ATK app. 720 * Finally, emacs compiled under terminfo, sets the terminal to dumb, 721 * so disable editing for that too. 722 * 723 * Unfortunately, in some cases the initial $TERM setting is "unknown", 724 * "dumb", or "network" which is then changed in the user's startup files. 725 * We fix this by setting noediting here if $TERM is unknown/dumb and 726 * if noediting is set, we switch on editing if $TERM is changed. 727 */ 728 if ((tcp = getenv("TERM")) != NULL) { 729 setv(STRterm, quote(SAVE(tcp)), VAR_READWRITE); 730 noediting = strcmp(tcp, "unknown") == 0 || strcmp(tcp, "dumb") == 0 || 731 strcmp(tcp, "network") == 0; 732 editing = strcmp(tcp, "emacs") != 0 && strcmp(tcp, "wm") != 0 && 733 !noediting; 734 } 735 else { 736 noediting = 0; 737 editing = ((tcp = getenv("EMACS")) == NULL || strcmp(tcp, "t") != 0); 738 } 739 740 /* 741 * The 'edit' variable is either set or unset. It doesn't 742 * need a value. Making it 'emacs' might be confusing. 743 */ 744 if (editing) 745 setNS(STRedit); 746 747 748 /* 749 * still more mutability: make the complete routine automatically add the 750 * suffix of file names... 751 */ 752 setNS(STRaddsuffix); 753 754 /* 755 * Compatibility with tcsh >= 6.12 by default 756 */ 757 setNS(STRcsubstnonl); 758 759 /* 760 * Random default kill ring size 761 */ 762 setcopy(STRkillring, str2short("30"), VAR_READWRITE); 763 764 /* 765 * Re-initialize path if set in environment 766 */ 767 if ((tcp = getenv("PATH")) == NULL) 768 #ifdef _PATH_DEFPATH 769 importpath(str2short(_PATH_DEFPATH)); 770 #else /* !_PATH_DEFPATH */ 771 setq(STRpath, defaultpath(), &shvhed, VAR_READWRITE); 772 #endif /* _PATH_DEFPATH */ 773 else 774 /* Importpath() allocates memory for the path, and the 775 * returned pointer from SAVE() was discarded, so 776 * this was a memory leak.. (sg) 777 * 778 * importpath(SAVE(tcp)); 779 */ 780 importpath(str2short(tcp)); 781 782 783 { 784 /* If the SHELL environment variable ends with "tcsh", set 785 * STRshell to the same path. This is to facilitate using 786 * the executable in environments where the compiled-in 787 * default isn't appropriate (sg). 788 */ 789 790 size_t sh_len = 0; 791 792 if ((tcp = getenv("SHELL")) != NULL) { 793 sh_len = strlen(tcp); 794 if ((sh_len >= 5 && strcmp(tcp + (sh_len - 5), "/tcsh") == 0) || 795 (!tcsh && sh_len >= 4 && strcmp(tcp + (sh_len - 4), "/csh") == 0)) 796 setv(STRshell, quote(SAVE(tcp)), VAR_READWRITE); 797 else 798 sh_len = 0; 799 } 800 if (sh_len == 0) 801 setcopy(STRshell, STR_SHELLPATH, VAR_READWRITE); 802 } 803 804 #ifdef _OSD_POSIX /* BS2000 needs this variable set to "SHELL" */ 805 if ((tcp = getenv("PROGRAM_ENVIRONMENT")) == NULL) 806 tcp = "SHELL"; 807 tsetenv(STRPROGRAM_ENVIRONMENT, quote(str2short(tcp))); 808 #endif /* _OSD_POSIX */ 809 810 #ifdef COLOR_LS_F 811 if ((tcp = getenv("LS_COLORS")) != NULL) 812 parseLS_COLORS(str2short(tcp)); 813 if ((tcp = getenv("LSCOLORS")) != NULL) 814 parseLSCOLORS(str2short(tcp)); 815 #endif /* COLOR_LS_F */ 816 817 mainpid = getpid(); 818 doldol = putn((tcsh_number_t)mainpid); /* For $$ */ 819 #ifdef WINNT_NATIVE 820 { 821 char *tmp; 822 Char *tmp2; 823 if ((tmp = getenv("TMP")) != NULL) { 824 tmp = xasprintf("%s/%s", tmp, "sh"); 825 tmp2 = SAVE(tmp); 826 xfree(tmp); 827 } 828 else { 829 tmp2 = SAVE(""); 830 } 831 shtemp = Strspl(tmp2, doldol); /* For << */ 832 xfree(tmp2); 833 } 834 #else /* !WINNT_NATIVE */ 835 #ifdef HAVE_MKSTEMP 836 { 837 const char *tmpdir = getenv ("TMPDIR"); 838 if (!tmpdir) 839 tmpdir = "/tmp"; 840 shtemp = Strspl(SAVE(tmpdir), SAVE("/sh" TMP_TEMPLATE)); /* For << */ 841 } 842 #else /* !HAVE_MKSTEMP */ 843 shtemp = Strspl(STRtmpsh, doldol); /* For << */ 844 #endif /* HAVE_MKSTEMP */ 845 #endif /* WINNT_NATIVE */ 846 847 /* 848 * Record the interrupt states from the parent process. If the parent is 849 * non-interruptible our hand must be forced or we (and our children) won't 850 * be either. Our children inherit termination from our parent. We catch it 851 * only if we are the login shell. 852 */ 853 sigaction(SIGINT, NULL, &parintr); 854 sigaction(SIGTERM, NULL, &parterm); 855 856 857 #ifdef TCF 858 /* Enable process migration on ourselves and our progeny */ 859 (void) signal(SIGMIGRATE, SIG_DFL); 860 #endif /* TCF */ 861 862 /* 863 * dspkanji/dspmbyte autosetting 864 */ 865 /* PATCH IDEA FROM Issei.Suzuki VERY THANKS */ 866 #if defined(DSPMBYTE) 867 #if defined(NLS) && defined(LC_CTYPE) 868 if (((tcp = setlocale(LC_CTYPE, NULL)) != NULL || (tcp = getenv("LANG")) != NULL) && !adrof(CHECK_MBYTEVAR)) 869 #else 870 if ((tcp = getenv("LANG")) != NULL && !adrof(CHECK_MBYTEVAR)) 871 #endif 872 { 873 autoset_dspmbyte(str2short(tcp)); 874 } 875 #if defined(WINNT_NATIVE) 876 else if (!adrof(CHECK_MBYTEVAR)) 877 nt_autoset_dspmbyte(); 878 #endif /* WINNT_NATIVE */ 879 #endif 880 #if defined(AUTOSET_KANJI) 881 # if defined(NLS) && defined(LC_CTYPE) 882 if (setlocale(LC_CTYPE, NULL) != NULL || getenv("LANG") != NULL) 883 # else 884 if (getenv("LANG") != NULL) 885 # endif 886 autoset_kanji(); 887 #endif /* AUTOSET_KANJI */ 888 fix_version(); /* publish the shell version */ 889 890 if (argc > 1 && strcmp(argv[1], "--version") == 0) { 891 xprintf("%S\n", varval(STRversion)); 892 xexit(0); 893 } 894 if (argc > 1 && strcmp(argv[1], "--help") == 0) { 895 xprintf("%S\n\n", varval(STRversion)); 896 xprintf("%s", CGETS(11, 8, HELP_STRING)); 897 xexit(0); 898 } 899 /* 900 * Process the arguments. 901 * 902 * Note that processing of -v/-x is actually delayed till after script 903 * processing. 904 * 905 * We set the first character of our name to be '-' if we are a shell 906 * running interruptible commands. Many programs which examine ps'es 907 * use this to filter such shells out. 908 */ 909 argc--, tempv++; 910 while (argc > 0 && (tcp = tempv[0])[0] == '-' && 911 *++tcp != '\0' && !batch) { 912 do 913 switch (*tcp++) { 914 915 case 0: /* - Interruptible, no prompt */ 916 prompt = 0; 917 setintr = 1; 918 nofile = 1; 919 break; 920 921 case 'b': /* -b Next arg is input file */ 922 batch = 1; 923 break; 924 925 case 'c': /* -c Command input from arg */ 926 if (argc == 1) 927 xexit(0); 928 argc--, tempv++; 929 #ifdef M_XENIX 930 /* Xenix Vi bug: 931 it relies on a 7 bit environment (/bin/sh), so it 932 pass ascii arguments with the 8th bit set */ 933 if (!strcmp(argv[0], "sh")) 934 { 935 char *p; 936 937 for (p = tempv[0]; *p; ++p) 938 *p &= ASCII; 939 } 940 #endif 941 targinp = tempv[0]; 942 prompt = 0; 943 nofile = 1; 944 break; 945 case 'd': /* -d Load directory stack from file */ 946 rdirs = 1; 947 break; 948 949 #ifdef apollo 950 case 'D': /* -D Define environment variable */ 951 { 952 Char *dp; 953 954 cp = str2short(tcp); 955 if (dp = Strchr(cp, '=')) { 956 *dp++ = '\0'; 957 tsetenv(cp, dp); 958 } 959 else 960 tsetenv(cp, STRNULL); 961 } 962 *tcp = '\0'; /* done with this argument */ 963 break; 964 #endif /* apollo */ 965 966 case 'e': /* -e Exit on any error */ 967 exiterr = 1; 968 break; 969 970 case 'f': /* -f Fast start */ 971 fast = 1; 972 break; 973 974 case 'i': /* -i Interactive, even if !intty */ 975 intact = 1; 976 nofile = 1; 977 break; 978 979 case 'm': /* -m read .cshrc (from su) */ 980 mflag = 1; 981 break; 982 983 case 'n': /* -n Don't execute */ 984 noexec = 1; 985 break; 986 987 case 'q': /* -q (Undoc'd) ... die on quit */ 988 quitit = 1; 989 break; 990 991 case 's': /* -s Read from std input */ 992 nofile = 1; 993 break; 994 995 case 't': /* -t Read one line from input */ 996 onelflg = 2; 997 prompt = 0; 998 nofile = 1; 999 break; 1000 1001 case 'v': /* -v Echo hist expanded input */ 1002 nverbose = 1; /* ... later */ 1003 break; 1004 1005 case 'x': /* -x Echo just before execution */ 1006 nexececho = 1; /* ... later */ 1007 break; 1008 1009 case 'V': /* -V Echo hist expanded input */ 1010 setNS(STRverbose); /* NOW! */ 1011 break; 1012 1013 case 'X': /* -X Echo just before execution */ 1014 setNS(STRecho); /* NOW! */ 1015 break; 1016 1017 case 'F': 1018 /* 1019 * This will cause children to be created using fork instead of 1020 * vfork. 1021 */ 1022 use_fork = 1; 1023 break; 1024 1025 case ' ': 1026 case '\t': 1027 case '\r': 1028 case '\n': 1029 /* 1030 * for O/S's that don't do the argument parsing right in 1031 * "#!/foo -f " scripts 1032 */ 1033 break; 1034 1035 default: /* Unknown command option */ 1036 exiterr = 1; 1037 stderror(ERR_TCSHUSAGE, tcp-1, progname); 1038 break; 1039 1040 } while (*tcp); 1041 tempv++, argc--; 1042 } 1043 1044 if (quitit) /* With all due haste, for debugging */ 1045 (void) signal(SIGQUIT, SIG_DFL); 1046 1047 /* 1048 * Unless prevented by -, -c, -i, -s, or -t, if there are remaining 1049 * arguments the first of them is the name of a shell file from which to 1050 * read commands. 1051 */ 1052 if (nofile == 0 && argc > 0) { 1053 nofile = xopen(tempv[0], O_RDONLY|O_LARGEFILE); 1054 if (nofile < 0) { 1055 child = 1; /* So this ... */ 1056 /* ... doesn't return */ 1057 stderror(ERR_SYSTEM, tempv[0], strerror(errno)); 1058 } 1059 xfree(ffile); 1060 dolzero = 1; 1061 ffile = SAVE(tempv[0]); 1062 /* 1063 * Replace FSHIN. Handle /dev/std{in,out,err} specially 1064 * since once they are closed we cannot open them again. 1065 * In that case we use our own saved descriptors 1066 */ 1067 if ((SHIN = dmove(nofile, FSHIN)) < 0) 1068 switch(nofile) { 1069 case 0: 1070 SHIN = FSHIN; 1071 break; 1072 case 1: 1073 SHIN = FSHOUT; 1074 break; 1075 case 2: 1076 SHIN = FSHDIAG; 1077 break; 1078 default: 1079 stderror(ERR_SYSTEM, tempv[0], strerror(errno)); 1080 break; 1081 } 1082 (void) close_on_exec(SHIN, 1); 1083 prompt = 0; 1084 /* argc not used any more */ tempv++; 1085 } 1086 1087 /* 1088 * Call to closem() used to be part of initdesc(). Now called below where 1089 * the script name argument has become stdin. Kernel may have used a file 1090 * descriptor to hold the name of the script (setuid case) and this name 1091 * mustn't be lost by closing the fd too soon. 1092 */ 1093 closem(); 1094 1095 /* 1096 * Consider input a tty if it really is or we are interactive. but not for 1097 * editing (christos) 1098 */ 1099 if (!(intty = isatty(SHIN))) { 1100 if (adrof(STRedit)) 1101 unsetv(STRedit); 1102 editing = 0; 1103 } 1104 intty |= intact; 1105 #ifndef convex 1106 if (intty || (intact && isatty(SHOUT))) { 1107 if (!batch && (uid != euid || gid != egid)) { 1108 errno = EACCES; 1109 child = 1; /* So this ... */ 1110 /* ... doesn't return */ 1111 stderror(ERR_SYSTEM, progname, strerror(errno)); 1112 } 1113 } 1114 #endif /* convex */ 1115 isoutatty = isatty(SHOUT); 1116 isdiagatty = isatty(SHDIAG); 1117 /* 1118 * Decide whether we should play with signals or not. If we are explicitly 1119 * told (via -i, or -) or we are a login shell (arg0 starts with -) or the 1120 * input and output are both the ttys("csh", or "csh</dev/ttyx>/dev/ttyx") 1121 * Note that in only the login shell is it likely that parent may have set 1122 * signals to be ignored 1123 */ 1124 if (loginsh || intact || (intty && isatty(SHOUT))) 1125 setintr = 1; 1126 settell(); 1127 /* 1128 * Save the remaining arguments in argv. 1129 */ 1130 setq(STRargv, blk2short(tempv), &shvhed, VAR_READWRITE); 1131 1132 /* 1133 * Set up the prompt. 1134 */ 1135 if (prompt) { 1136 setcopy(STRprompt, STRdefprompt, VAR_READWRITE); 1137 /* that's a meta-questionmark */ 1138 setcopy(STRprompt2, STRmquestion, VAR_READWRITE); 1139 setcopy(STRprompt3, STRKCORRECT, VAR_READWRITE); 1140 } 1141 1142 /* 1143 * If we are an interactive shell, then start fiddling with the signals; 1144 * this is a tricky game. 1145 */ 1146 shpgrp = mygetpgrp(); 1147 opgrp = tpgrp = -1; 1148 if (setintr) { 1149 struct sigaction osig; 1150 1151 **argv = '-'; 1152 if (!quitit) /* Wary! */ 1153 (void) signal(SIGQUIT, SIG_IGN); 1154 pintr_disabled = 1; 1155 sigset_interrupting(SIGINT, queue_pintr); 1156 (void) signal(SIGTERM, SIG_IGN); 1157 1158 /* 1159 * No reason I can see not to save history on all these events.. 1160 * Most usual occurrence is in a window system, where we're not a login 1161 * shell, but might as well be... (sg) 1162 * But there might be races when lots of shells exit together... 1163 * [this is also incompatible]. 1164 * We have to be mre careful here. If the parent wants to 1165 * ignore the signals then we leave them untouched... 1166 * We also only setup the handlers for shells that are trully 1167 * interactive. 1168 */ 1169 sigaction(SIGHUP, NULL, &osig); 1170 if (loginsh || osig.sa_handler != SIG_IGN) 1171 /* exit processing on HUP */ 1172 sigset_interrupting(SIGHUP, queue_phup); 1173 #ifdef SIGXCPU 1174 sigaction(SIGXCPU, NULL, &osig); 1175 if (loginsh || osig.sa_handler != SIG_IGN) 1176 /* exit processing on XCPU */ 1177 sigset_interrupting(SIGXCPU, queue_phup); 1178 #endif 1179 #ifdef SIGXFSZ 1180 sigaction(SIGXFSZ, NULL, &osig); 1181 if (loginsh || osig.sa_handler != SIG_IGN) 1182 /* exit processing on XFSZ */ 1183 sigset_interrupting(SIGXFSZ, queue_phup); 1184 #endif 1185 1186 if (quitit == 0 && targinp == 0) { 1187 #ifdef SIGTSTP 1188 (void) signal(SIGTSTP, SIG_IGN); 1189 #endif 1190 #ifdef SIGTTIN 1191 (void) signal(SIGTTIN, SIG_IGN); 1192 #endif 1193 #ifdef SIGTTOU 1194 (void) signal(SIGTTOU, SIG_IGN); 1195 #endif 1196 /* 1197 * Wait till in foreground, in case someone stupidly runs csh & 1198 * dont want to try to grab away the tty. 1199 */ 1200 if (isatty(FSHDIAG)) 1201 f = FSHDIAG; 1202 else if (isatty(FSHOUT)) 1203 f = FSHOUT; 1204 else if (isatty(OLDSTD)) 1205 f = OLDSTD; 1206 else 1207 f = -1; 1208 1209 #ifdef NeXT 1210 /* NeXT 2.0 /usr/etc/rlogind, does not set our process group! */ 1211 if (f != -1 && shpgrp == 0) { 1212 shpgrp = getpid(); 1213 (void) setpgid(0, shpgrp); 1214 (void) tcsetpgrp(f, shpgrp); 1215 } 1216 #endif /* NeXT */ 1217 #ifdef BSDJOBS /* if we have tty job control */ 1218 if (f != -1 && grabpgrp(f, shpgrp) != -1) { 1219 /* 1220 * Thanks to Matt Day for the POSIX references, and to 1221 * Paul Close for the SGI clarification. 1222 */ 1223 if (setdisc(f) != -1) { 1224 opgrp = shpgrp; 1225 shpgrp = getpid(); 1226 tpgrp = shpgrp; 1227 if (tcsetpgrp(f, shpgrp) == -1) { 1228 /* 1229 * On hpux 7.03 this fails with EPERM. This happens on 1230 * the 800 when opgrp != shpgrp at this point. (we were 1231 * forked from a non job control shell) 1232 * POSIX 7.2.4, says we failed because the process 1233 * group specified did not belong to a process 1234 * in the same session with the tty. So we set our 1235 * process group and try again. 1236 */ 1237 if (setpgid(0, shpgrp) == -1) { 1238 xprintf("setpgid:"); 1239 goto notty; 1240 } 1241 if (tcsetpgrp(f, shpgrp) == -1) { 1242 xprintf("tcsetpgrp:"); 1243 goto notty; 1244 } 1245 } 1246 /* 1247 * We check the process group now. If it is the same, then 1248 * we don't need to set it again. On hpux 7.0 on the 300's 1249 * if we set it again it fails with EPERM. This is the 1250 * correct behavior according to POSIX 4.3.3 if the process 1251 * was a session leader . 1252 */ 1253 else if (shpgrp != mygetpgrp()) { 1254 if(setpgid(0, shpgrp) == -1) { 1255 xprintf("setpgid:"); 1256 goto notty; 1257 } 1258 } 1259 #ifdef IRIS4D 1260 /* 1261 * But on irix 3.3 we need to set it again, even if it is 1262 * the same. We do that to tell the system that we 1263 * need BSD process group compatibility. 1264 */ 1265 else 1266 (void) setpgid(0, shpgrp); 1267 #endif 1268 (void) close_on_exec(dcopy(f, FSHTTY), 1); 1269 } 1270 else 1271 tpgrp = -1; 1272 } 1273 if (tpgrp == -1) { 1274 notty: 1275 xprintf(CGETS(11, 1, "Warning: no access to tty (%s).\n"), 1276 strerror(errno)); 1277 xprintf("%s", 1278 CGETS(11, 2, "Thus no job control in this shell.\n")); 1279 /* 1280 * Fix from:Sakari Jalovaara <sja@sirius.hut.fi> if we don't 1281 * have access to tty, disable editing too 1282 */ 1283 if (adrof(STRedit)) 1284 unsetv(STRedit); 1285 editing = 0; 1286 } 1287 #else /* BSDJOBS */ /* don't have job control, so frotz it */ 1288 tpgrp = -1; 1289 #endif /* BSDJOBS */ 1290 } 1291 } 1292 if (setintr == 0 && parintr.sa_handler == SIG_DFL) 1293 setintr = 1; 1294 1295 /* 1296 * SVR4 doesn't send a SIGCHLD when a child is stopped or continued if the 1297 * handler is installed with signal(2) or sigset(2). sigaction(2) must 1298 * be used instead. 1299 * 1300 * David Dawes (dawes@physics.su.oz.au) Sept 1991 1301 */ 1302 sigset_interrupting(SIGCHLD, queue_pchild); 1303 1304 if (intty && !targinp) 1305 (void) ed_Setup(editing);/* Get the tty state, and set defaults */ 1306 /* Only alter the tty state if editing */ 1307 1308 /* 1309 * Set an exit here in case of an interrupt or error reading the shell 1310 * start-up scripts. 1311 */ 1312 osetintr = setintr; 1313 oparintr = parintr; 1314 (void)cleanup_push_mark(); /* There is no outer handler */ 1315 if (setexit() != 0) /* PWP */ 1316 reenter = 1; 1317 else 1318 reenter = 0; 1319 exitset++; 1320 haderr = 0; /* In case second time through */ 1321 if (!fast && reenter == 0) { 1322 /* Will have varval(STRhome) here because set fast if don't */ 1323 { 1324 pintr_disabled++; 1325 cleanup_push(&pintr_disabled, disabled_cleanup); 1326 setintr = 0;/*FIXRESET:cleanup*/ 1327 /* onintr in /etc/ files has no effect */ 1328 parintr.sa_handler = SIG_IGN;/*FIXRESET: cleanup*/ 1329 #ifdef LOGINFIRST 1330 #ifdef _PATH_DOTLOGIN 1331 if (loginsh) 1332 (void) srcfile(_PATH_DOTLOGIN, 0, 0, NULL); 1333 #endif 1334 #endif 1335 1336 #ifdef _PATH_DOTCSHRC 1337 (void) srcfile(_PATH_DOTCSHRC, 0, 0, NULL); 1338 #endif 1339 if (!targinp && !onelflg && !havhash) 1340 dohash(NULL,NULL); 1341 #ifndef LOGINFIRST 1342 #ifdef _PATH_DOTLOGIN 1343 if (loginsh) 1344 (void) srcfile(_PATH_DOTLOGIN, 0, 0, NULL); 1345 #endif 1346 #endif 1347 cleanup_until(&pintr_disabled); 1348 setintr = osetintr; 1349 parintr = oparintr; 1350 } 1351 #ifdef LOGINFIRST 1352 if (loginsh) 1353 (void) srccat(varval(STRhome), STRsldotlogin); 1354 #endif 1355 /* upward compat. */ 1356 if (!srccat(varval(STRhome), STRsldottcshrc)) 1357 (void) srccat(varval(STRhome), STRsldotcshrc); 1358 1359 if (!targinp && !onelflg && !havhash) 1360 dohash(NULL,NULL); 1361 1362 /* 1363 * Source history before .login so that it is available in .login 1364 */ 1365 loadhist(NULL, 0); 1366 #ifndef LOGINFIRST 1367 if (loginsh) 1368 (void) srccat(varval(STRhome), STRsldotlogin); 1369 #endif 1370 if (loginsh || rdirs) 1371 loaddirs(NULL); 1372 } 1373 /* Reset interrupt flag */ 1374 setintr = osetintr; 1375 parintr = oparintr; 1376 exitset--; 1377 1378 /* Initing AFTER .cshrc is the Right Way */ 1379 if (intty && !targinp) { /* PWP setup stuff */ 1380 ed_Init(); /* init the new line editor */ 1381 #ifdef SIG_WINDOW 1382 check_window_size(1); /* mung environment */ 1383 #endif /* SIG_WINDOW */ 1384 } 1385 1386 /* 1387 * Now are ready for the -v and -x flags 1388 */ 1389 if (nverbose) 1390 setNS(STRverbose); 1391 if (nexececho) 1392 setNS(STRecho); 1393 1394 1395 if (targinp) { 1396 arginp = SAVE(targinp); 1397 /* 1398 * we put the command into a variable 1399 */ 1400 if (arginp != NULL) 1401 setv(STRcommand, quote(Strsave(arginp)), VAR_READWRITE); 1402 1403 /* 1404 * * Give an error on -c arguments that end in * backslash to 1405 * ensure that you don't make * nonportable csh scripts. 1406 */ 1407 { 1408 int count; 1409 1410 cp = Strend(arginp); 1411 count = 0; 1412 while (cp > arginp && *--cp == '\\') 1413 ++count; 1414 if ((count & 1) != 0) { 1415 exiterr = 1; 1416 stderror(ERR_ARGC); 1417 } 1418 } 1419 } 1420 /* 1421 * All the rest of the world is inside this call. The argument to process 1422 * indicates whether it should catch "error unwinds". Thus if we are a 1423 * interactive shell our call here will never return by being blown past on 1424 * an error. 1425 */ 1426 process(setintr); 1427 1428 /* 1429 * Mop-up. 1430 */ 1431 /* Take care of these (especially HUP) here instead of inside flush. */ 1432 handle_pending_signals(); 1433 if (intty) { 1434 if (loginsh) { 1435 xprintf("logout\n"); 1436 xclose(SHIN); 1437 child = 1; 1438 #ifdef TESLA 1439 do_logout = 1; 1440 #endif /* TESLA */ 1441 goodbye(NULL, NULL); 1442 } 1443 else { 1444 xprintf("exit\n"); 1445 } 1446 } 1447 record(); 1448 exitstat(); 1449 return (0); 1450 } 1451 1452 void 1453 untty(void) 1454 { 1455 #ifdef BSDJOBS 1456 if (tpgrp > 0 && opgrp != shpgrp) { 1457 (void) setpgid(0, opgrp); 1458 (void) tcsetpgrp(FSHTTY, opgrp); 1459 (void) resetdisc(FSHTTY); 1460 } 1461 #endif /* BSDJOBS */ 1462 } 1463 1464 void 1465 importpath(Char *cp) 1466 { 1467 size_t i = 0; 1468 Char *dp; 1469 Char **pv; 1470 int c; 1471 1472 for (dp = cp; *dp; dp++) 1473 if (*dp == PATHSEP) 1474 i++; 1475 /* 1476 * i+2 where i is the number of colons in the path. There are i+1 1477 * directories in the path plus we need room for a zero terminator. 1478 */ 1479 pv = xcalloc(i + 2, sizeof(Char *)); 1480 dp = cp; 1481 i = 0; 1482 if (*dp) 1483 for (;;) { 1484 if ((c = *dp) == PATHSEP || c == 0) { 1485 *dp = 0; 1486 pv[i++] = Strsave(*cp ? cp : STRdot); 1487 if (c) { 1488 cp = dp + 1; 1489 *dp = PATHSEP; 1490 } 1491 else 1492 break; 1493 } 1494 #ifdef WINNT_NATIVE 1495 else if (*dp == '\\') 1496 *dp = '/'; 1497 #endif /* WINNT_NATIVE */ 1498 dp++; 1499 } 1500 pv[i] = 0; 1501 cleanup_push(pv, blk_cleanup); 1502 setq(STRpath, pv, &shvhed, VAR_READWRITE); 1503 cleanup_ignore(pv); 1504 cleanup_until(pv); 1505 } 1506 1507 /* 1508 * Source to the file which is the catenation of the argument names. 1509 */ 1510 static int 1511 srccat(Char *cp, Char *dp) 1512 { 1513 if (cp[0] == '/' && cp[1] == '\0') 1514 return srcfile(short2str(dp), (mflag ? 0 : 1), 0, NULL); 1515 else { 1516 Char *ep; 1517 char *ptr; 1518 int rv; 1519 1520 #ifdef WINNT_NATIVE 1521 ep = Strend(cp); 1522 if (ep != cp && ep[-1] == '/' && dp[0] == '/') /* silly win95 */ 1523 dp++; 1524 #endif /* WINNT_NATIVE */ 1525 1526 ep = Strspl(cp, dp); 1527 cleanup_push(ep, xfree); 1528 ptr = short2str(ep); 1529 1530 rv = srcfile(ptr, (mflag ? 0 : 1), 0, NULL); 1531 cleanup_until(ep); 1532 return rv; 1533 } 1534 } 1535 1536 /* 1537 * Source to a file putting the file descriptor in a safe place (> 2). 1538 */ 1539 #ifndef WINNT_NATIVE 1540 static int 1541 #else 1542 int 1543 #endif /*WINNT_NATIVE*/ 1544 srcfile(const char *f, int onlyown, int flag, Char **av) 1545 { 1546 int unit; 1547 1548 if ((unit = xopen(f, O_RDONLY|O_LARGEFILE)) == -1) 1549 return 0; 1550 cleanup_push(&unit, open_cleanup); 1551 unit = dmove(unit, -1); 1552 cleanup_ignore(&unit); 1553 cleanup_until(&unit); 1554 1555 (void) close_on_exec(unit, 1); 1556 srcunit(unit, onlyown, flag, av); 1557 return 1; 1558 } 1559 1560 1561 /* 1562 * Save the shell state, and establish new argument vector, and new input 1563 * fd. 1564 */ 1565 static void 1566 st_save(struct saved_state *st, int unit, int hflg, Char **al, Char **av) 1567 { 1568 st->insource = insource; 1569 st->SHIN = SHIN; 1570 /* Want to preserve the meaning of "source file >output". 1571 * Save old descriptors, move new 0,1,2 to safe places and assign 1572 * them to SH* and let process() redo 0,1,2 from them. 1573 * 1574 * The macro returns true if d1 and d2 are good and they point to 1575 * different things. If you don't avoid saving duplicate 1576 * descriptors, you really limit the depth of "source" recursion 1577 * you can do because of all the open file descriptors. -IAN! 1578 */ 1579 #define NEED_SAVE_FD(d1,d2) \ 1580 (fstat(d1, &s1) != -1 && fstat(d2, &s2) != -1 \ 1581 && (s1.st_ino != s2.st_ino || s1.st_dev != s2.st_dev) ) 1582 1583 st->OLDSTD = st->SHOUT = st->SHDIAG = -1;/* test later to restore these */ 1584 if (didfds) { 1585 struct stat s1, s2; 1586 if (NEED_SAVE_FD(0,OLDSTD)) { 1587 st->OLDSTD = OLDSTD; 1588 OLDSTD = dmove(0, -1); 1589 (void)close_on_exec(OLDSTD, 1); 1590 } 1591 if (NEED_SAVE_FD(1,SHOUT)) { 1592 st->SHOUT = SHOUT; 1593 SHOUT = dmove(1, -1); 1594 (void)close_on_exec(SHOUT, 1); 1595 } 1596 if (NEED_SAVE_FD(2,SHDIAG)) { 1597 st->SHDIAG = SHDIAG; 1598 SHDIAG = dmove(2, -1); 1599 (void)close_on_exec(SHDIAG, 1); 1600 } 1601 donefds(); 1602 } 1603 1604 st->intty = intty; 1605 st->whyles = whyles; 1606 st->gointr = gointr; 1607 st->arginp = arginp; 1608 st->evalp = evalp; 1609 st->evalvec = evalvec; 1610 st->alvecp = alvecp; 1611 st->alvec = alvec; 1612 st->onelflg = onelflg; 1613 st->enterhist = enterhist; 1614 st->justpr = justpr; 1615 if (hflg) 1616 st->HIST = HIST; 1617 else 1618 st->HIST = '\0'; 1619 st->cantell = cantell; 1620 cpybin(st->B, B); 1621 1622 /* 1623 * we can now pass arguments to source. 1624 * For compatibility we do that only if arguments were really 1625 * passed, otherwise we keep the old, global $argv like before. 1626 */ 1627 if (av != NULL && *av != NULL) { 1628 struct varent *vp; 1629 if ((vp = adrof(STRargv)) != NULL && vp->vec != NULL) 1630 st->argv = saveblk(vp->vec); 1631 else 1632 st->argv = NULL; 1633 setq(STRargv, saveblk(av), &shvhed, VAR_READWRITE); 1634 } 1635 else 1636 st->argv = NULL; 1637 st->av = av; 1638 1639 SHIN = unit; /* Do this first */ 1640 1641 /* Establish new input arena */ 1642 { 1643 fbuf = NULL; 1644 fseekp = feobp = fblocks = 0; 1645 settell(); 1646 } 1647 1648 arginp = 0; 1649 onelflg = 0; 1650 intty = isatty(SHIN); 1651 whyles = 0; 1652 gointr = 0; 1653 evalvec = 0; 1654 evalp = 0; 1655 alvec = al; 1656 alvecp = 0; 1657 enterhist = hflg; 1658 if (enterhist) 1659 HIST = '\0'; 1660 insource = 1; 1661 } 1662 1663 1664 /* 1665 * Restore the shell to a saved state 1666 */ 1667 static void 1668 st_restore(void *xst) 1669 { 1670 struct saved_state *st; 1671 1672 st = xst; 1673 if (st->SHIN == -1) 1674 return; 1675 1676 /* Reset input arena */ 1677 { 1678 int i; 1679 Char** nfbuf = fbuf; 1680 int nfblocks = fblocks; 1681 1682 fblocks = 0; 1683 fbuf = NULL; 1684 for (i = 0; i < nfblocks; i++) 1685 xfree(nfbuf[i]); 1686 xfree(nfbuf); 1687 } 1688 cpybin(B, st->B); 1689 1690 xclose(SHIN); 1691 1692 insource = st->insource; 1693 SHIN = st->SHIN; 1694 if (st->OLDSTD != -1) 1695 xclose(OLDSTD), OLDSTD = st->OLDSTD; 1696 if (st->SHOUT != -1) 1697 xclose(SHOUT), SHOUT = st->SHOUT; 1698 if (st->SHDIAG != -1) 1699 xclose(SHDIAG), SHDIAG = st->SHDIAG; 1700 arginp = st->arginp; 1701 onelflg = st->onelflg; 1702 evalp = st->evalp; 1703 evalvec = st->evalvec; 1704 alvecp = st->alvecp; 1705 alvec = st->alvec; 1706 intty = st->intty; 1707 whyles = st->whyles; 1708 gointr = st->gointr; 1709 if (st->HIST != '\0') 1710 HIST = st->HIST; 1711 enterhist = st->enterhist; 1712 cantell = st->cantell; 1713 justpr = st->justpr; 1714 1715 if (st->argv != NULL) 1716 setq(STRargv, st->argv, &shvhed, VAR_READWRITE); 1717 else if (st->av != NULL && *st->av != NULL && adrof(STRargv) != NULL) 1718 unsetv(STRargv); 1719 } 1720 1721 /* 1722 * Source to a unit. If onlyown it must be our file or our group or 1723 * we don't chance it. This occurs on ".cshrc"s and the like. 1724 */ 1725 static void 1726 srcunit(int unit, int onlyown, int hflg, Char **av) 1727 { 1728 struct saved_state st; 1729 1730 st.SHIN = -1; /* st_restore checks this */ 1731 1732 if (unit < 0) 1733 return; 1734 1735 if (onlyown) { 1736 struct stat stb; 1737 1738 if (fstat(unit, &stb) < 0) { 1739 xclose(unit); 1740 return; 1741 } 1742 } 1743 1744 /* Does nothing before st_save() because st.SHIN == -1 */ 1745 cleanup_push(&st, st_restore); 1746 if (setintr) { 1747 pintr_disabled++; 1748 cleanup_push(&pintr_disabled, disabled_cleanup); 1749 } 1750 1751 /* Save the current state and move us to a new state */ 1752 st_save(&st, unit, hflg, NULL, av); 1753 1754 /* 1755 * Now if we are allowing commands to be interrupted, we let ourselves be 1756 * interrupted. 1757 */ 1758 if (setintr) { 1759 cleanup_until(&pintr_disabled); 1760 pintr_disabled++; 1761 cleanup_push(&pintr_disabled, disabled_cleanup); 1762 } 1763 1764 process(0); /* 0 -> blow away on errors */ 1765 1766 /* Restore the old state */ 1767 cleanup_until(&st); 1768 } 1769 1770 1771 /*ARGSUSED*/ 1772 void 1773 goodbye(Char **v, struct command *c) 1774 { 1775 USE(v); 1776 USE(c); 1777 record(); 1778 1779 if (loginsh) { 1780 size_t omark; 1781 sigset_t set; 1782 1783 sigemptyset(&set); 1784 signal(SIGQUIT, SIG_IGN); 1785 sigaddset(&set, SIGQUIT); 1786 sigprocmask(SIG_UNBLOCK, &set, NULL); 1787 signal(SIGINT, SIG_IGN); 1788 sigaddset(&set, SIGINT); 1789 signal(SIGTERM, SIG_IGN); 1790 sigaddset(&set, SIGTERM); 1791 signal(SIGHUP, SIG_IGN); 1792 sigaddset(&set, SIGHUP); 1793 sigprocmask(SIG_UNBLOCK, &set, NULL); 1794 phup_disabled = 1; 1795 setintr = 0; /* No interrupts after "logout" */ 1796 /* Trap errors inside .logout */ 1797 omark = cleanup_push_mark(); 1798 if (setexit() == 0) { 1799 if (!(adrof(STRlogout))) 1800 setcopy(STRlogout, STRnormal, VAR_READWRITE); 1801 #ifdef _PATH_DOTLOGOUT 1802 (void) srcfile(_PATH_DOTLOGOUT, 0, 0, NULL); 1803 #endif 1804 if (adrof(STRhome)) 1805 (void) srccat(varval(STRhome), STRsldtlogout); 1806 #ifdef TESLA 1807 do_logout = 1; 1808 #endif /* TESLA */ 1809 } 1810 cleanup_pop_mark(omark); 1811 } 1812 exitstat(); 1813 } 1814 1815 void 1816 exitstat(void) 1817 { 1818 #ifdef PROF 1819 _mcleanup(); 1820 #endif 1821 /* 1822 * Note that if STATUS is corrupted (i.e. getn bombs) then error will exit 1823 * directly because we poke child here. Otherwise we might continue 1824 * unwarrantedly (sic). 1825 */ 1826 child = 1; 1827 1828 xexit(getn(varval(STRstatus))); 1829 } 1830 1831 /* 1832 * in the event of a HUP we want to save the history 1833 */ 1834 void 1835 phup(void) 1836 { 1837 if (loginsh) { 1838 setcopy(STRlogout, STRhangup, VAR_READWRITE); 1839 #ifdef _PATH_DOTLOGOUT 1840 (void) srcfile(_PATH_DOTLOGOUT, 0, 0, NULL); 1841 #endif 1842 if (adrof(STRhome)) 1843 (void) srccat(varval(STRhome), STRsldtlogout); 1844 } 1845 1846 record(); 1847 1848 #ifdef POSIXJOBS 1849 /* 1850 * We kill the last foreground process group. It then becomes 1851 * responsible to propagate the SIGHUP to its progeny. 1852 */ 1853 { 1854 struct process *pp, *np; 1855 1856 for (pp = proclist.p_next; pp; pp = pp->p_next) { 1857 np = pp; 1858 /* 1859 * Find if this job is in the foreground. It could be that 1860 * the process leader has exited and the foreground flag 1861 * is cleared for it. 1862 */ 1863 do 1864 /* 1865 * If a process is in the foreground we try to kill 1866 * it's process group. If we succeed, then the 1867 * whole job is gone. Otherwise we keep going... 1868 * But avoid sending HUP to the shell again. 1869 */ 1870 if (((np->p_flags & PFOREGND) != 0) && np->p_jobid != shpgrp) { 1871 np->p_flags &= ~PHUP; 1872 if (killpg(np->p_jobid, SIGHUP) != -1) { 1873 /* In case the job was suspended... */ 1874 #ifdef SIGCONT 1875 (void) killpg(np->p_jobid, SIGCONT); 1876 #endif 1877 break; 1878 } 1879 } 1880 while ((np = np->p_friends) != pp); 1881 } 1882 } 1883 #endif /* POSIXJOBS */ 1884 1885 xexit(SIGHUP); 1886 } 1887 1888 static Char *jobargv[2] = {STRjobs, 0}; 1889 1890 /* 1891 * Catch an interrupt, e.g. during lexical input. 1892 * If we are an interactive shell, we reset the interrupt catch 1893 * immediately. In any case we drain the shell output, 1894 * and finally go through the normal error mechanism, which 1895 * gets a chance to make the shell go away. 1896 */ 1897 int just_signaled; /* bugfix by Michael Bloom (mg@ttidca.TTI.COM) */ 1898 1899 void 1900 pintr(void) 1901 { 1902 just_signaled = 1; 1903 pintr1(1); 1904 } 1905 1906 void 1907 pintr1(int wantnl) 1908 { 1909 if (setintr) { 1910 if (pjobs) { 1911 pjobs = 0; 1912 xputchar('\n'); 1913 dojobs(jobargv, NULL); 1914 stderror(ERR_NAME | ERR_INTR); 1915 } 1916 } 1917 /* MH - handle interrupted completions specially */ 1918 { 1919 if (InsideCompletion) 1920 stderror(ERR_SILENT); 1921 } 1922 /* JV - Make sure we shut off inputl */ 1923 { 1924 (void) Cookedmode(); 1925 GettingInput = 0; 1926 if (evalvec) 1927 doneinp = 1; 1928 } 1929 drainoline(); 1930 #ifdef HAVE_GETPWENT 1931 (void) endpwent(); 1932 #endif 1933 1934 /* 1935 * If we have an active "onintr" then we search for the label. Note that if 1936 * one does "onintr -" then we shan't be interruptible so we needn't worry 1937 * about that here. 1938 */ 1939 if (gointr) { 1940 gotolab(gointr); 1941 reset(); 1942 } 1943 else if (intty && wantnl) { 1944 if (editing) { 1945 /* 1946 * If we are editing a multi-line input command, and move to 1947 * the beginning of the line, we don't want to trash it when 1948 * we hit ^C 1949 */ 1950 PastBottom(); 1951 ClearLines(); 1952 ClearDisp(); 1953 } 1954 else { 1955 /* xputchar('\n'); *//* Some like this, others don't */ 1956 (void) putraw('\r'); 1957 (void) putraw('\n'); 1958 } 1959 } 1960 stderror(ERR_SILENT); 1961 } 1962 1963 /* 1964 * Process is the main driving routine for the shell. 1965 * It runs all command processing, except for those within { ... } 1966 * in expressions (which is run by a routine evalav in sh.exp.c which 1967 * is a stripped down process), and `...` evaluation which is run 1968 * also by a subset of this code in sh.glob.c in the routine backeval. 1969 * 1970 * The code here is a little strange because part of it is interruptible 1971 * and hence freeing of structures appears to occur when none is necessary 1972 * if this is ignored. 1973 * 1974 * Note that if catch is not set then we will unwind on any error. 1975 * If an end-of-file occurs, we return. 1976 */ 1977 void 1978 process(int catch) 1979 { 1980 jmp_buf_t osetexit; 1981 /* PWP: This might get nuked by longjmp so don't make it a register var */ 1982 size_t omark; 1983 volatile int didexitset = 0; 1984 1985 getexit(osetexit); 1986 omark = cleanup_push_mark(); 1987 for (;;) { 1988 struct command *t; 1989 int hadhist, old_pintr_disabled; 1990 1991 (void)setexit(); 1992 if (didexitset == 0) { 1993 exitset++; 1994 didexitset++; 1995 } 1996 pendjob(); 1997 1998 justpr = enterhist; /* execute if not entering history */ 1999 2000 if (haderr) { 2001 if (!catch) { 2002 /* unwind */ 2003 doneinp = 0; 2004 cleanup_pop_mark(omark); 2005 resexit(osetexit); 2006 reset(); 2007 } 2008 haderr = 0; 2009 /* 2010 * Every error is eventually caught here or the shell dies. It is 2011 * at this point that we clean up any left-over open files, by 2012 * closing all but a fixed number of pre-defined files. Thus 2013 * routines don't have to worry about leaving files open due to 2014 * deeper errors... they will get closed here. 2015 */ 2016 closem(); 2017 continue; 2018 } 2019 if (doneinp) { 2020 doneinp = 0; 2021 break; 2022 } 2023 if (chkstop) 2024 chkstop--; 2025 if (neednote) 2026 pnote(); 2027 if (intty && prompt && evalvec == 0) { 2028 just_signaled = 0; 2029 mailchk(); 2030 /* 2031 * Watch for logins/logouts. Next is scheduled commands stored 2032 * previously using "sched." Then execute periodic commands. 2033 * Following that, the prompt precmd is run. 2034 */ 2035 #ifndef HAVENOUTMP 2036 watch_login(0); 2037 #endif /* !HAVENOUTMP */ 2038 sched_run(); 2039 period_cmd(); 2040 precmd(); 2041 /* 2042 * If we are at the end of the input buffer then we are going to 2043 * read fresh stuff. Otherwise, we are rereading input and don't 2044 * need or want to prompt. 2045 */ 2046 if (fseekp == feobp && aret == TCSH_F_SEEK) 2047 printprompt(0, NULL); 2048 flush(); 2049 setalarm(1); 2050 } 2051 if (seterr) { 2052 xfree(seterr); 2053 seterr = NULL; 2054 } 2055 2056 /* 2057 * Interruptible during interactive reads 2058 */ 2059 if (setintr) 2060 pintr_push_enable(&old_pintr_disabled); 2061 freelex(¶ml); 2062 hadhist = lex(¶ml); 2063 if (setintr) 2064 cleanup_until(&old_pintr_disabled); 2065 cleanup_push(¶ml, lex_cleanup); 2066 2067 /* 2068 * Echo not only on VERBOSE, but also with history expansion. If there 2069 * is a lexical error then we forego history echo. 2070 * Do not echo if we're only entering history (source -h). 2071 */ 2072 if ((hadhist && !seterr && intty && !tellwhat && !Expand && !whyles) || 2073 (!enterhist && adrof(STRverbose))) 2074 { 2075 int odidfds = didfds; 2076 haderr = 1; 2077 didfds = 0; 2078 prlex(¶ml); 2079 flush(); 2080 haderr = 0; 2081 didfds = odidfds; 2082 } 2083 (void) alarm(0); /* Autologout OFF */ 2084 alrmcatch_disabled = 1; 2085 2086 /* 2087 * Save input text on the history list if reading in old history, or it 2088 * is from the terminal at the top level and not in a loop. 2089 * 2090 * PWP: entry of items in the history list while in a while loop is done 2091 * elsewhere... 2092 */ 2093 if (enterhist || (catch && intty && !whyles && !tellwhat && !arun)) 2094 savehist(¶ml, enterhist > 1); 2095 2096 if (Expand && seterr) 2097 Expand = 0; 2098 2099 /* 2100 * Print lexical error messages, except when sourcing history lists. 2101 */ 2102 if (!enterhist && seterr) 2103 stderror(ERR_OLD); 2104 2105 /* 2106 * If had a history command :p modifier then this is as far as we 2107 * should go 2108 */ 2109 if (justpr) 2110 goto cmd_done; 2111 2112 /* 2113 * If had a tellwhat from twenex() then do 2114 */ 2115 if (tellwhat) { 2116 (void) tellmewhat(¶ml, NULL); 2117 goto cmd_done; 2118 } 2119 2120 alias(¶ml); 2121 2122 #ifdef BSDJOBS 2123 /* 2124 * If we are interactive, try to continue jobs that we have stopped 2125 */ 2126 if (prompt) 2127 continue_jobs(¶ml); 2128 #endif /* BSDJOBS */ 2129 2130 /* 2131 * Check to see if the user typed "rm * .o" or something 2132 */ 2133 if (prompt) 2134 rmstar(¶ml); 2135 /* 2136 * Parse the words of the input into a parse tree. 2137 */ 2138 t = syntax(paraml.next, ¶ml, 0); 2139 /* 2140 * We cannot cleanup push here, because cd /blah; echo foo 2141 * would rewind t on the chdir error, and free the rest of the command 2142 */ 2143 if (seterr) { 2144 freesyn(t); 2145 stderror(ERR_OLD); 2146 } 2147 2148 postcmd(); 2149 /* 2150 * Execute the parse tree From: Michael Schroeder 2151 * <mlschroe@immd4.informatik.uni-erlangen.de> was execute(t, tpgrp); 2152 */ 2153 execute(t, (tpgrp > 0 ? tpgrp : -1), NULL, NULL, TRUE); 2154 freesyn(t); 2155 2156 /* 2157 * Made it! 2158 */ 2159 #ifdef SIG_WINDOW 2160 if (windowchg || (catch && intty && !whyles && !tellwhat)) { 2161 (void) check_window_size(0); /* for window systems */ 2162 } 2163 #endif /* SIG_WINDOW */ 2164 setcopy(STR_, InputBuf, VAR_READWRITE | VAR_NOGLOB); 2165 cmd_done: 2166 if (cleanup_reset()) 2167 cleanup_until(¶ml); 2168 else 2169 haderr = 1; 2170 } 2171 cleanup_pop_mark(omark); 2172 resexit(osetexit); 2173 exitset--; 2174 handle_pending_signals(); 2175 } 2176 2177 /*ARGSUSED*/ 2178 void 2179 dosource(Char **t, struct command *c) 2180 { 2181 Char *f; 2182 int hflg = 0; 2183 char *file; 2184 2185 USE(c); 2186 t++; 2187 if (*t && eq(*t, STRmh)) { 2188 if (*++t == NULL) 2189 stderror(ERR_NAME | ERR_HFLAG); 2190 hflg++; 2191 } 2192 else if (*t && eq(*t, STRmm)) { 2193 if (*++t == NULL) 2194 stderror(ERR_NAME | ERR_MFLAG); 2195 hflg = 2; 2196 } 2197 2198 f = globone(*t++, G_ERROR); 2199 file = strsave(short2str(f)); 2200 cleanup_push(file, xfree); 2201 xfree(f); 2202 t = glob_all_or_error(t); 2203 cleanup_push(t, blk_cleanup); 2204 if ((!srcfile(file, 0, hflg, t)) && (!hflg) && (!bequiet)) 2205 stderror(ERR_SYSTEM, file, strerror(errno)); 2206 cleanup_until(file); 2207 } 2208 2209 /* 2210 * Check for mail. 2211 * If we are a login shell, then we don't want to tell 2212 * about any mail file unless its been modified 2213 * after the time we started. 2214 * This prevents us from telling the user things he already 2215 * knows, since the login program insists on saying 2216 * "You have mail." 2217 */ 2218 2219 /* 2220 * The AMS version. 2221 * This version checks if the file is a directory, and if so, 2222 * tells you the number of files in it, otherwise do the old thang. 2223 * The magic "+1" in the time calculation is to compensate for 2224 * an AFS bug where directory mtimes are set to 1 second in 2225 * the future. 2226 */ 2227 2228 static void 2229 mailchk(void) 2230 { 2231 struct varent *v; 2232 Char **vp; 2233 time_t t; 2234 int intvl, cnt; 2235 struct stat stb; 2236 int new; 2237 2238 v = adrof(STRmail); 2239 if (v == NULL || v->vec == NULL) 2240 return; 2241 (void) time(&t); 2242 vp = v->vec; 2243 cnt = blklen(vp); 2244 intvl = (cnt && number(*vp)) ? (--cnt, getn(*vp++)) : MAILINTVL; 2245 if (intvl < 1) 2246 intvl = 1; 2247 if (chktim + intvl > t) 2248 return; 2249 for (; *vp; vp++) { 2250 char *filename = short2str(*vp); 2251 char *mboxdir = filename; 2252 2253 if (stat(filename, &stb) < 0) 2254 continue; 2255 #if defined(BSDTIMES) || defined(_SEQUENT_) 2256 new = stb.st_mtime > time0.tv_sec; 2257 #else 2258 new = stb.st_mtime > seconds0; 2259 #endif 2260 if (S_ISDIR(stb.st_mode)) { 2261 DIR *mailbox; 2262 int mailcount = 0; 2263 char *tempfilename; 2264 struct stat stc; 2265 2266 tempfilename = xasprintf("%s/new", filename); 2267 2268 if (stat(tempfilename, &stc) != -1 && S_ISDIR(stc.st_mode)) { 2269 /* 2270 * "filename/new" exists and is a directory; you are 2271 * using Qmail. 2272 */ 2273 stb = stc; 2274 #if defined(BSDTIMES) || defined(_SEQUENT_) 2275 new = stb.st_mtime > time0.tv_sec; 2276 #else 2277 new = stb.st_mtime > seconds0; 2278 #endif 2279 mboxdir = tempfilename; 2280 } 2281 2282 if (stb.st_mtime <= chktim + 1 || (loginsh && !new)) { 2283 xfree(tempfilename); 2284 continue; 2285 } 2286 2287 mailbox = opendir(mboxdir); 2288 xfree(tempfilename); 2289 if (mailbox == NULL) 2290 continue; 2291 2292 /* skip . and .. */ 2293 if (!readdir(mailbox) || !readdir(mailbox)) { 2294 (void)closedir(mailbox); 2295 continue; 2296 } 2297 2298 while (readdir(mailbox)) 2299 mailcount++; 2300 2301 (void)closedir(mailbox); 2302 if (mailcount == 0) 2303 continue; 2304 2305 if (cnt == 1) 2306 xprintf(CGETS(11, 3, "You have %d mail messages.\n"), 2307 mailcount); 2308 else 2309 xprintf(CGETS(11, 4, "You have %d mail messages in %s.\n"), 2310 mailcount, filename); 2311 } 2312 else { 2313 char *type; 2314 2315 if (stb.st_size == 0 || stb.st_atime >= stb.st_mtime || 2316 (stb.st_atime <= chktim && stb.st_mtime <= chktim) || 2317 (loginsh && !new)) 2318 continue; 2319 type = strsave(new ? CGETS(11, 6, "new ") : ""); 2320 cleanup_push(type, xfree); 2321 if (cnt == 1) 2322 xprintf(CGETS(11, 5, "You have %smail.\n"), type); 2323 else 2324 xprintf(CGETS(11, 7, "You have %smail in %s.\n"), type, filename); 2325 cleanup_until(type); 2326 } 2327 } 2328 chktim = t; 2329 } 2330 2331 /* 2332 * Extract a home directory from the password file 2333 * The argument points to a buffer where the name of the 2334 * user whose home directory is sought is currently. 2335 * We return home directory of the user, or NULL. 2336 */ 2337 Char * 2338 gethdir(const Char *home) 2339 { 2340 Char *h; 2341 2342 /* 2343 * Is it us? 2344 */ 2345 if (*home == '\0') { 2346 if ((h = varval(STRhome)) != STRNULL) 2347 return Strsave(h); 2348 else 2349 return NULL; 2350 } 2351 2352 /* 2353 * Look in the cache 2354 */ 2355 if ((h = gettilde(home)) == NULL) 2356 return NULL; 2357 else 2358 return Strsave(h); 2359 } 2360 2361 /* 2362 * Move the initial descriptors to their eventual 2363 * resting places, closing all other units. 2364 */ 2365 void 2366 initdesc(void) 2367 { 2368 #ifdef NLS_BUGS 2369 #ifdef NLS_CATALOGS 2370 nlsclose(); 2371 #endif /* NLS_CATALOGS */ 2372 #endif /* NLS_BUGS */ 2373 2374 2375 didfds = 0; /* 0, 1, 2 aren't set up */ 2376 (void) close_on_exec(SHIN = dcopy(0, FSHIN), 1); 2377 (void) close_on_exec(SHOUT = dcopy(1, FSHOUT), 1); 2378 (void) close_on_exec(SHDIAG = dcopy(2, FSHDIAG), 1); 2379 (void) close_on_exec(OLDSTD = dcopy(SHIN, FOLDSTD), 1); 2380 #ifndef CLOSE_ON_EXEC 2381 didcch = 0; /* Havent closed for child */ 2382 #endif /* CLOSE_ON_EXEC */ 2383 if (SHDIAG >= 0) 2384 isdiagatty = isatty(SHDIAG); 2385 else 2386 isdiagatty = 0; 2387 if (SHDIAG >= 0) 2388 isoutatty = isatty(SHOUT); 2389 else 2390 isoutatty = 0; 2391 #ifdef NLS_BUGS 2392 #ifdef NLS_CATALOGS 2393 nlsinit(); 2394 #endif /* NLS_CATALOGS */ 2395 #endif /* NLS_BUGS */ 2396 } 2397 2398 2399 void 2400 #ifdef PROF 2401 done(int i) 2402 #else 2403 xexit(int i) 2404 #endif 2405 { 2406 #ifdef TESLA 2407 if (loginsh && do_logout) { 2408 /* this is to send hangup signal to the develcon */ 2409 /* we toggle DTR. clear dtr - sleep 1 - set dtr */ 2410 /* ioctl will return ENOTTY for pty's but we ignore it */ 2411 /* exitstat will run after disconnect */ 2412 /* we sleep for 2 seconds to let things happen in */ 2413 /* .logout and rechist() */ 2414 #ifdef TIOCCDTR 2415 (void) sleep(2); 2416 (void) ioctl(FSHTTY, TIOCCDTR, NULL); 2417 (void) sleep(1); 2418 (void) ioctl(FSHTTY, TIOCSDTR, NULL); 2419 #endif /* TIOCCDTR */ 2420 } 2421 #endif /* TESLA */ 2422 2423 { 2424 struct process *pp, *np; 2425 pid_t mypid = getpid(); 2426 /* Kill all processes marked for hup'ing */ 2427 for (pp = proclist.p_next; pp; pp = pp->p_next) { 2428 np = pp; 2429 do 2430 if ((np->p_flags & PHUP) && np->p_jobid != shpgrp && 2431 np->p_parentid == mypid) { 2432 if (killpg(np->p_jobid, SIGHUP) != -1) { 2433 /* In case the job was suspended... */ 2434 #ifdef SIGCONT 2435 (void) killpg(np->p_jobid, SIGCONT); 2436 #endif 2437 break; 2438 } 2439 } 2440 while ((np = np->p_friends) != pp); 2441 } 2442 } 2443 untty(); 2444 #ifdef NLS_CATALOGS 2445 /* 2446 * We need to call catclose, because SVR4 leaves symlinks behind otherwise 2447 * in the catalog directories. We cannot close on a vforked() child, 2448 * because messages will stop working on the parent too. 2449 */ 2450 if (child == 0) 2451 nlsclose(); 2452 #endif /* NLS_CATALOGS */ 2453 #ifdef WINNT_NATIVE 2454 nt_cleanup(); 2455 #endif /* WINNT_NATIVE */ 2456 _exit(i); 2457 } 2458 2459 #ifndef _PATH_DEFPATH 2460 static Char ** 2461 defaultpath(void) 2462 { 2463 char *ptr; 2464 Char **blk, **blkp; 2465 struct stat stb; 2466 2467 blkp = blk = xmalloc(sizeof(Char *) * 10); 2468 2469 #ifndef NODOT 2470 # ifndef DOTLAST 2471 *blkp++ = Strsave(STRdot); 2472 # endif 2473 #endif 2474 2475 #define DIRAPPEND(a) \ 2476 if (stat(ptr = a, &stb) == 0 && S_ISDIR(stb.st_mode)) \ 2477 *blkp++ = SAVE(ptr) 2478 2479 #ifdef _PATH_LOCAL 2480 DIRAPPEND(_PATH_LOCAL); 2481 #endif 2482 2483 #ifdef _PATH_USRUCB 2484 DIRAPPEND(_PATH_USRUCB); 2485 #endif 2486 2487 #ifdef _PATH_USRBSD 2488 DIRAPPEND(_PATH_USRBSD); 2489 #endif 2490 2491 #ifdef _PATH_BIN 2492 DIRAPPEND(_PATH_BIN); 2493 #endif 2494 2495 #ifdef _PATH_USRBIN 2496 DIRAPPEND(_PATH_USRBIN); 2497 #endif 2498 2499 #undef DIRAPPEND 2500 2501 #ifndef NODOT 2502 # ifdef DOTLAST 2503 *blkp++ = Strsave(STRdot); 2504 # endif 2505 #endif 2506 *blkp = NULL; 2507 return (blk); 2508 } 2509 #endif 2510 2511 static void 2512 record(void) 2513 { 2514 if (!fast) { 2515 recdirs(NULL, adrof(STRsavedirs) != NULL); 2516 rechist(NULL, adrof(STRsavehist) != NULL); 2517 } 2518 displayHistStats("Exiting"); /* no-op unless DEBUG_HIST */ 2519 } 2520 2521 /* 2522 * Grab the tty repeatedly, and give up if we are not in the correct 2523 * tty process group. 2524 */ 2525 int 2526 grabpgrp(int fd, pid_t desired) 2527 { 2528 struct sigaction old; 2529 pid_t pgrp; 2530 size_t i; 2531 2532 for (i = 0; i < 100; i++) { 2533 if ((pgrp = tcgetpgrp(fd)) == -1) 2534 return -1; 2535 if (pgrp == desired) 2536 return 0; 2537 (void)sigaction(SIGTTIN, NULL, &old); 2538 (void)signal(SIGTTIN, SIG_DFL); 2539 (void)kill(0, SIGTTIN); 2540 (void)sigaction(SIGTTIN, &old, NULL); 2541 } 2542 errno = EPERM; 2543 return -1; 2544 } 2545