1 /*********************************************************************** 2 * * 3 * This software is part of the ast package * 4 * Copyright (c) 1982-2009 AT&T Intellectual Property * 5 * and is licensed under the * 6 * Common Public License, Version 1.0 * 7 * by AT&T Intellectual Property * 8 * * 9 * A copy of the License is available at * 10 * http://www.opensource.org/licenses/cpl1.0.txt * 11 * (with md5 checksum 059e8cd6165cb4c31e351f2b69388fd9) * 12 * * 13 * Information and Software Systems Research * 14 * AT&T Research * 15 * Florham Park NJ * 16 * * 17 * David Korn <dgk@research.att.com> * 18 * * 19 ***********************************************************************/ 20 #pragma prototyped 21 /* 22 * UNIX shell 23 * 24 * S. R. Bourne 25 * Rewritten By David Korn 26 * AT&T Labs 27 * 28 */ 29 30 #include <ast.h> 31 #include <sfio.h> 32 #include <stak.h> 33 #include <ls.h> 34 #include <fcin.h> 35 #include "defs.h" 36 #include "variables.h" 37 #include "path.h" 38 #include "io.h" 39 #include "jobs.h" 40 #include "shlex.h" 41 #include "shnodes.h" 42 #include "history.h" 43 #include "timeout.h" 44 #include "FEATURE/time" 45 #include "FEATURE/pstat" 46 #include "FEATURE/execargs" 47 #include "FEATURE/externs" 48 #ifdef _hdr_nc 49 # include <nc.h> 50 #endif /* _hdr_nc */ 51 52 #define CMD_LENGTH 64 53 54 /* These routines are referenced by this module */ 55 static void exfile(Shell_t*, Sfio_t*,int); 56 static void chkmail(Shell_t *shp, char*); 57 #if defined(_lib_fork) && !defined(_NEXT_SOURCE) 58 static void fixargs(char**,int); 59 #else 60 # define fixargs(a,b) 61 #endif 62 63 #ifndef environ 64 extern char **environ; 65 #endif 66 67 static struct stat lastmail; 68 static time_t mailtime; 69 static char beenhere = 0; 70 71 #ifdef _lib_sigvec 72 void clearsigmask(register int sig) 73 { 74 struct sigvec vec; 75 if(sigvec(sig,NIL(struct sigvec*),&vec)>=0 && vec.sv_mask) 76 { 77 vec.sv_mask = 0; 78 sigvec(sig,&vec,NIL(struct sigvec*)); 79 } 80 } 81 #endif /* _lib_sigvec */ 82 83 #ifdef _lib_fts_notify 84 # include <fts.h> 85 /* check for interrupts during tree walks */ 86 static int fts_sigcheck(FTS* fp, FTSENT* ep, void* context) 87 { 88 Shell_t *shp = (Shell_t*)context; 89 NOT_USED(fp); 90 NOT_USED(ep); 91 if(shp->trapnote&SH_SIGSET) 92 { 93 errno = EINTR; 94 return(-1); 95 } 96 return(0); 97 } 98 #endif /* _lib_fts_notify */ 99 100 #ifdef PATH_BFPATH 101 #define PATHCOMP NIL(Pathcomp_t*) 102 #else 103 #define PATHCOMP "" 104 #endif 105 106 /* 107 * search for file and exfile() it if it exists 108 * 1 returned if file found, 0 otherwise 109 */ 110 111 int sh_source(Shell_t *shp, Sfio_t *iop, const char *file) 112 { 113 char* oid; 114 char* nid; 115 int fd; 116 117 if (!file || !*file || (fd = path_open(file, PATHCOMP)) < 0) 118 { 119 REGRESS(source, "sh_source", ("%s:ENOENT", file)); 120 return 0; 121 } 122 oid = error_info.id; 123 nid = error_info.id = strdup(file); 124 shp->st.filename = path_fullname(stakptr(PATH_OFFSET)); 125 REGRESS(source, "sh_source", ("%s", file)); 126 exfile(shp, iop, fd); 127 error_info.id = oid; 128 free(nid); 129 return 1; 130 } 131 132 #ifdef S_ISSOCK 133 #define REMOTE(m) (S_ISSOCK(m)||!(m)) 134 #else 135 #define REMOTE(m) !(m) 136 #endif 137 138 int sh_main(int ac, char *av[], Shinit_f userinit) 139 { 140 register char *name; 141 register int fdin; 142 register Sfio_t *iop; 143 register Shell_t *shp; 144 struct stat statb; 145 int i, rshflag; /* set for restricted shell */ 146 char *command; 147 #ifdef _lib_sigvec 148 /* This is to clear mask that may be left on by rlogin */ 149 clearsigmask(SIGALRM); 150 clearsigmask(SIGHUP); 151 clearsigmask(SIGCHLD); 152 #endif /* _lib_sigvec */ 153 #ifdef _hdr_nc 154 _NutConf(_NC_SET_SUFFIXED_SEARCHING, 1); 155 #endif /* _hdr_nc */ 156 fixargs(av,0); 157 shp = sh_init(ac,av,userinit); 158 time(&mailtime); 159 if(rshflag=sh_isoption(SH_RESTRICTED)) 160 sh_offoption(SH_RESTRICTED); 161 #ifdef _lib_fts_notify 162 fts_notify(fts_sigcheck,(void*)shp); 163 #endif /* _lib_fts_notify */ 164 if(sigsetjmp(*((sigjmp_buf*)shp->jmpbuffer),0)) 165 { 166 /* begin script execution here */ 167 sh_reinit((char**)0); 168 } 169 shp->fn_depth = shp->dot_depth = 0; 170 command = error_info.id; 171 /* set pidname '$$' */ 172 shp->pid = getpid(); 173 srand(shp->pid&0x7fff); 174 shp->ppid = getppid(); 175 if(nv_isnull(PS4NOD)) 176 nv_putval(PS4NOD,e_traceprompt,NV_RDONLY); 177 path_pwd(1); 178 iop = (Sfio_t*)0; 179 #if SHOPT_BRACEPAT 180 sh_onoption(SH_BRACEEXPAND); 181 #endif 182 if((beenhere++)==0) 183 { 184 sh_onstate(SH_PROFILE); 185 ((Lex_t*)shp->lex_context)->nonstandard = 0; 186 if(shp->ppid==1) 187 shp->login_sh++; 188 if(shp->login_sh >= 2) 189 sh_onoption(SH_LOGIN_SHELL); 190 /* decide whether shell is interactive */ 191 if(!sh_isoption(SH_INTERACTIVE) && !sh_isoption(SH_TFLAG) && !sh_isoption(SH_CFLAG) && 192 sh_isoption(SH_SFLAG) && tty_check(0) && tty_check(ERRIO)) 193 sh_onoption(SH_INTERACTIVE); 194 if(sh_isoption(SH_INTERACTIVE)) 195 { 196 sh_onoption(SH_BGNICE); 197 sh_onoption(SH_RC); 198 } 199 if(!sh_isoption(SH_RC) && (sh_isoption(SH_BASH) && !sh_isoption(SH_POSIX) 200 #if SHOPT_REMOTE 201 || !fstat(0, &statb) && REMOTE(statb.st_mode) 202 #endif 203 )) 204 sh_onoption(SH_RC); 205 for(i=0; i<elementsof(shp->offoptions.v); i++) 206 shp->options.v[i] &= ~shp->offoptions.v[i]; 207 if(sh_isoption(SH_INTERACTIVE)) 208 { 209 #ifdef SIGXCPU 210 signal(SIGXCPU,SIG_DFL); 211 #endif /* SIGXCPU */ 212 #ifdef SIGXFSZ 213 signal(SIGXFSZ,SIG_DFL); 214 #endif /* SIGXFSZ */ 215 sh_onoption(SH_MONITOR); 216 } 217 job_init(shp,sh_isoption(SH_LOGIN_SHELL)); 218 if(sh_isoption(SH_LOGIN_SHELL)) 219 { 220 /* system profile */ 221 sh_source(shp, iop, e_sysprofile); 222 if(!sh_isoption(SH_NOUSRPROFILE) && !sh_isoption(SH_PRIVILEGED)) 223 { 224 char **files = shp->login_files; 225 while ((name = *files++) && !sh_source(shp, iop, sh_mactry(shp,name))); 226 } 227 } 228 /* make sure PWD is set up correctly */ 229 path_pwd(1); 230 if(!sh_isoption(SH_NOEXEC)) 231 { 232 if(!sh_isoption(SH_NOUSRPROFILE) && !sh_isoption(SH_PRIVILEGED) && sh_isoption(SH_RC)) 233 { 234 #if SHOPT_BASH 235 if(sh_isoption(SH_BASH) && !sh_isoption(SH_POSIX)) 236 { 237 #if SHOPT_SYSRC 238 sh_source(shp, iop, e_bash_sysrc); 239 #endif 240 sh_source(shp, iop, shp->rcfile ? shp->rcfile : sh_mactry(shp,(char*)e_bash_rc)); 241 } 242 else 243 #endif 244 { 245 if(name = sh_mactry(shp,nv_getval(ENVNOD))) 246 name = *name ? strdup(name) : (char*)0; 247 #if SHOPT_SYSRC 248 if(!strmatch(name, "?(.)/./*")) 249 sh_source(shp, iop, e_sysrc); 250 #endif 251 if(name) 252 { 253 sh_source(shp, iop, name); 254 free(name); 255 } 256 } 257 } 258 else if(sh_isoption(SH_INTERACTIVE) && sh_isoption(SH_PRIVILEGED)) 259 sh_source(shp, iop, e_suidprofile); 260 } 261 shp->st.cmdname = error_info.id = command; 262 sh_offstate(SH_PROFILE); 263 if(rshflag) 264 sh_onoption(SH_RESTRICTED); 265 /* open input file if specified */ 266 if(shp->comdiv) 267 { 268 shell_c: 269 iop = sfnew(NIL(Sfio_t*),shp->comdiv,strlen(shp->comdiv),0,SF_STRING|SF_READ); 270 } 271 else 272 { 273 name = error_info.id; 274 error_info.id = shp->shname; 275 if(sh_isoption(SH_SFLAG)) 276 fdin = 0; 277 else 278 { 279 char *sp; 280 /* open stream should have been passed into shell */ 281 if(strmatch(name,e_devfdNN)) 282 { 283 #if !_WINIX 284 char *cp; 285 int type; 286 #endif 287 fdin = (int)strtol(name+8, (char**)0, 10); 288 if(fstat(fdin,&statb)<0) 289 errormsg(SH_DICT,ERROR_system(1),e_open,name); 290 #if !_WINIX 291 /* 292 * try to undo effect of solaris 2.5+ 293 * change for argv for setuid scripts 294 */ 295 if(((type = sh_type(cp = av[0])) & SH_TYPE_SH) && (!(name = nv_getval(L_ARGNOD)) || !((type = sh_type(cp = name)) & SH_TYPE_SH))) 296 { 297 av[0] = (type & SH_TYPE_LOGIN) ? cp : path_basename(cp); 298 /* exec to change $0 for ps */ 299 execv(pathshell(),av); 300 /* exec fails */ 301 shp->st.dolv[0] = av[0]; 302 fixargs(shp->st.dolv,1); 303 } 304 #endif 305 name = av[0]; 306 sh_offoption(SH_VERBOSE); 307 sh_offoption(SH_XTRACE); 308 } 309 else 310 { 311 int isdir = 0; 312 if((fdin=sh_open(name,O_RDONLY,0))>=0 &&(fstat(fdin,&statb)<0 || S_ISDIR(statb.st_mode))) 313 { 314 close(fdin); 315 isdir = 1; 316 fdin = -1; 317 } 318 else 319 shp->st.filename = path_fullname(name); 320 sp = 0; 321 if(fdin < 0 && !strchr(name,'/')) 322 { 323 #ifdef PATH_BFPATH 324 if(path_absolute(name,NIL(Pathcomp_t*))) 325 sp = stakptr(PATH_OFFSET); 326 #else 327 sp = path_absolute(name,NIL(char*)); 328 #endif 329 if(sp) 330 { 331 if((fdin=sh_open(sp,O_RDONLY,0))>=0) 332 shp->st.filename = path_fullname(sp); 333 } 334 } 335 if(fdin<0) 336 { 337 if(isdir) 338 errno = EISDIR; 339 error_info.id = av[0]; 340 if(sp || errno!=ENOENT) 341 errormsg(SH_DICT,ERROR_system(ERROR_NOEXEC),e_open,name); 342 /* try sh -c 'name "$@"' */ 343 sh_onoption(SH_CFLAG); 344 shp->comdiv = (char*)malloc(strlen(name)+7); 345 name = strcopy(shp->comdiv,name); 346 if(shp->st.dolc) 347 strcopy(name," \"$@\""); 348 goto shell_c; 349 } 350 if(fdin==0) 351 fdin = sh_iomovefd(fdin); 352 } 353 shp->readscript = shp->shname; 354 } 355 error_info.id = name; 356 shp->comdiv--; 357 #if SHOPT_ACCT 358 sh_accinit(); 359 if(fdin != 0) 360 sh_accbegin(error_info.id); 361 #endif /* SHOPT_ACCT */ 362 } 363 } 364 else 365 { 366 fdin = shp->infd; 367 fixargs(shp->st.dolv,1); 368 } 369 if(sh_isoption(SH_INTERACTIVE)) 370 sh_onstate(SH_INTERACTIVE); 371 nv_putval(IFSNOD,(char*)e_sptbnl,NV_RDONLY); 372 exfile(shp,iop,fdin); 373 sh_done(shp,0); 374 /* NOTREACHED */ 375 return(0); 376 } 377 378 /* 379 * iop is not null when the input is a string 380 * fdin is the input file descriptor 381 */ 382 383 static void exfile(register Shell_t *shp, register Sfio_t *iop,register int fno) 384 { 385 time_t curtime; 386 Shnode_t *t; 387 int maxtry=IOMAXTRY, tdone=0, execflags; 388 int states,jmpval; 389 struct checkpt buff; 390 sh_pushcontext(&buff,SH_JMPERREXIT); 391 /* open input stream */ 392 nv_putval(SH_PATHNAMENOD, shp->st.filename ,NV_NOFREE); 393 if(!iop) 394 { 395 if(fno > 0) 396 { 397 int r; 398 if(fno < 10 && ((r=sh_fcntl(fno,F_DUPFD,10))>=10)) 399 { 400 shp->fdstatus[r] = shp->fdstatus[fno]; 401 sh_close(fno); 402 fno = r; 403 } 404 fcntl(fno,F_SETFD,FD_CLOEXEC); 405 shp->fdstatus[fno] |= IOCLEX; 406 iop = sh_iostream((void*)shp,fno); 407 } 408 else 409 iop = sfstdin; 410 } 411 else 412 fno = -1; 413 shp->infd = fno; 414 if(sh_isstate(SH_INTERACTIVE)) 415 { 416 if(nv_isnull(PS1NOD)) 417 nv_putval(PS1NOD,(shp->euserid?e_stdprompt:e_supprompt),NV_RDONLY); 418 sh_sigdone(); 419 if(sh_histinit((void*)shp)) 420 sh_onoption(SH_HISTORY); 421 } 422 else 423 { 424 if(!sh_isstate(SH_PROFILE)) 425 { 426 buff.mode = SH_JMPEXIT; 427 sh_onoption(SH_TRACKALL); 428 sh_offoption(SH_MONITOR); 429 } 430 sh_offstate(SH_INTERACTIVE); 431 sh_offstate(SH_MONITOR); 432 sh_offstate(SH_HISTORY); 433 sh_offoption(SH_HISTORY); 434 } 435 states = sh_getstate(); 436 jmpval = sigsetjmp(buff.buff,0); 437 if(jmpval) 438 { 439 Sfio_t *top; 440 sh_iorestore((void*)shp,0,jmpval); 441 hist_flush(shp->hist_ptr); 442 sfsync(shp->outpool); 443 shp->st.execbrk = shp->st.breakcnt = 0; 444 /* check for return from profile or env file */ 445 if(sh_isstate(SH_PROFILE) && (jmpval==SH_JMPFUN || jmpval==SH_JMPEXIT)) 446 goto done; 447 if(!sh_isoption(SH_INTERACTIVE) || sh_isstate(SH_FORKED) || (jmpval > SH_JMPERREXIT && job_close(shp) >=0)) 448 { 449 sh_offstate(SH_INTERACTIVE); 450 sh_offstate(SH_MONITOR); 451 goto done; 452 } 453 /* skip over remaining input */ 454 if(top = fcfile()) 455 { 456 while(fcget()>0); 457 fcclose(); 458 while(top=sfstack(iop,SF_POPSTACK)) 459 sfclose(top); 460 } 461 /* make sure that we own the terminal */ 462 #ifdef SIGTSTP 463 tcsetpgrp(job.fd,shp->pid); 464 #endif /* SIGTSTP */ 465 } 466 /* error return here */ 467 sfclrerr(iop); 468 sh_setstate(states); 469 shp->st.optindex = 1; 470 opt_info.offset = 0; 471 shp->st.loopcnt = 0; 472 shp->trapnote = 0; 473 shp->intrap = 0; 474 error_info.line = 1; 475 shp->inlineno = 1; 476 shp->binscript = 0; 477 if(sfeof(iop)) 478 goto eof_or_error; 479 /* command loop */ 480 while(1) 481 { 482 shp->nextprompt = 1; 483 sh_freeup(shp); 484 stakset(NIL(char*),0); 485 exitset(); 486 sh_offstate(SH_STOPOK); 487 sh_offstate(SH_ERREXIT); 488 sh_offstate(SH_VERBOSE); 489 sh_offstate(SH_TIMING); 490 sh_offstate(SH_GRACE); 491 sh_offstate(SH_TTYWAIT); 492 if(sh_isoption(SH_VERBOSE)) 493 sh_onstate(SH_VERBOSE); 494 sh_onstate(SH_ERREXIT); 495 /* -eim flags don't apply to profiles */ 496 if(sh_isstate(SH_PROFILE)) 497 { 498 sh_offstate(SH_INTERACTIVE); 499 sh_offstate(SH_ERREXIT); 500 sh_offstate(SH_MONITOR); 501 } 502 if(sh_isstate(SH_INTERACTIVE) && !tdone) 503 { 504 register char *mail; 505 #ifdef JOBS 506 sh_offstate(SH_MONITOR); 507 if(sh_isoption(SH_MONITOR)) 508 sh_onstate(SH_MONITOR); 509 if(job.pwlist) 510 { 511 job_walk(sfstderr,job_list,JOB_NFLAG,(char**)0); 512 job_wait((pid_t)0); 513 } 514 #endif /* JOBS */ 515 if((mail=nv_getval(MAILPNOD)) || (mail=nv_getval(MAILNOD))) 516 { 517 time(&curtime); 518 if ((curtime - mailtime) >= sh_mailchk) 519 { 520 chkmail(shp,mail); 521 mailtime = curtime; 522 } 523 } 524 if(shp->hist_ptr) 525 hist_eof(shp->hist_ptr); 526 /* sets timeout for command entry */ 527 shp->timeout = shp->st.tmout; 528 #if SHOPT_TIMEOUT 529 if(shp->timeout <= 0 || shp->timeout > SHOPT_TIMEOUT) 530 shp->timeout = SHOPT_TIMEOUT; 531 #endif /* SHOPT_TIMEOUT */ 532 shp->inlineno = 1; 533 error_info.line = 1; 534 shp->exitval = 0; 535 shp->trapnote = 0; 536 if(buff.mode == SH_JMPEXIT) 537 { 538 buff.mode = SH_JMPERREXIT; 539 #ifdef DEBUG 540 errormsg(SH_DICT,ERROR_warn(0),"%d: mode changed to JMP_EXIT",getpid()); 541 #endif 542 } 543 } 544 errno = 0; 545 if(tdone || !sfreserve(iop,0,0)) 546 { 547 eof_or_error: 548 if(sh_isstate(SH_INTERACTIVE) && !sferror(iop)) 549 { 550 if(--maxtry>0 && sh_isoption(SH_IGNOREEOF) && 551 !sferror(sfstderr) && (shp->fdstatus[fno]&IOTTY)) 552 { 553 sfclrerr(iop); 554 errormsg(SH_DICT,0,e_logout); 555 continue; 556 } 557 else if(job_close(shp)<0) 558 continue; 559 } 560 if(errno==0 && sferror(iop) && --maxtry>0) 561 { 562 sfclrlock(iop); 563 sfclrerr(iop); 564 continue; 565 } 566 goto done; 567 } 568 maxtry = IOMAXTRY; 569 if(sh_isstate(SH_INTERACTIVE) && shp->hist_ptr) 570 { 571 job_wait((pid_t)0); 572 hist_eof(shp->hist_ptr); 573 sfsync(sfstderr); 574 } 575 if(sh_isoption(SH_HISTORY)) 576 sh_onstate(SH_HISTORY); 577 job.waitall = job.curpgid = 0; 578 error_info.flags |= ERROR_INTERACTIVE; 579 t = (Shnode_t*)sh_parse(shp,iop,0); 580 if(!sh_isstate(SH_INTERACTIVE) && !sh_isstate(SH_CFLAG)) 581 error_info.flags &= ~ERROR_INTERACTIVE; 582 shp->readscript = 0; 583 if(sh_isstate(SH_INTERACTIVE) && shp->hist_ptr) 584 hist_flush(shp->hist_ptr); 585 sh_offstate(SH_HISTORY); 586 if(t) 587 { 588 execflags = sh_state(SH_ERREXIT)|sh_state(SH_INTERACTIVE); 589 /* The last command may not have to fork */ 590 if(!sh_isstate(SH_PROFILE) && !sh_isstate(SH_INTERACTIVE) && 591 (fno<0 || !(shp->fdstatus[fno]&(IOTTY|IONOSEEK))) 592 && !sfreserve(iop,0,0)) 593 { 594 execflags |= sh_state(SH_NOFORK); 595 } 596 shp->st.execbrk = 0; 597 sh_exec(t,execflags); 598 if(shp->forked) 599 { 600 sh_offstate(SH_INTERACTIVE); 601 goto done; 602 } 603 /* This is for sh -t */ 604 if(sh_isoption(SH_TFLAG) && !sh_isstate(SH_PROFILE)) 605 tdone++; 606 } 607 } 608 done: 609 sh_popcontext(&buff); 610 if(sh_isstate(SH_INTERACTIVE)) 611 { 612 sfputc(sfstderr,'\n'); 613 job_close(shp); 614 } 615 if(jmpval == SH_JMPSCRIPT) 616 siglongjmp(*shp->jmplist,jmpval); 617 else if(jmpval == SH_JMPEXIT) 618 sh_done(shp,0); 619 if(fno>0) 620 sh_close(fno); 621 if(shp->st.filename) 622 free((void*)shp->st.filename); 623 shp->st.filename = 0; 624 } 625 626 627 /* prints out messages if files in list have been modified since last call */ 628 static void chkmail(Shell_t *shp, char *files) 629 { 630 register char *cp,*sp,*qp; 631 register char save; 632 struct argnod *arglist=0; 633 int offset = staktell(); 634 char *savstak=stakptr(0); 635 struct stat statb; 636 if(*(cp=files) == 0) 637 return; 638 sp = cp; 639 do 640 { 641 /* skip to : or end of string saving first '?' */ 642 for(qp=0;*sp && *sp != ':';sp++) 643 if((*sp == '?' || *sp=='%') && qp == 0) 644 qp = sp; 645 save = *sp; 646 *sp = 0; 647 /* change '?' to end-of-string */ 648 if(qp) 649 *qp = 0; 650 do 651 { 652 /* see if time has been modified since last checked 653 * and the access time <= the modification time 654 */ 655 if(stat(cp,&statb) >= 0 && statb.st_mtime >= mailtime 656 && statb.st_atime <= statb.st_mtime) 657 { 658 /* check for directory */ 659 if(!arglist && S_ISDIR(statb.st_mode)) 660 { 661 /* generate list of directory entries */ 662 path_complete(cp,"/*",&arglist); 663 } 664 else 665 { 666 /* 667 * If the file has shrunk, 668 * or if the size is zero 669 * then don't print anything 670 */ 671 if(statb.st_size && 672 ( statb.st_ino != lastmail.st_ino 673 || statb.st_dev != lastmail.st_dev 674 || statb.st_size > lastmail.st_size)) 675 { 676 /* save and restore $_ */ 677 char *save = shp->lastarg; 678 shp->lastarg = cp; 679 errormsg(SH_DICT,0,sh_mactry(shp,qp?qp+1:(char*)e_mailmsg)); 680 shp->lastarg = save; 681 } 682 lastmail = statb; 683 break; 684 } 685 } 686 if(arglist) 687 { 688 cp = arglist->argval; 689 arglist = arglist->argchn.ap; 690 } 691 else 692 cp = 0; 693 } 694 while(cp); 695 if(qp) 696 *qp = '?'; 697 *sp++ = save; 698 cp = sp; 699 } 700 while(save); 701 stakset(savstak,offset); 702 } 703 704 #undef EXECARGS 705 #undef PSTAT 706 #if defined(_hdr_execargs) && defined(pdp11) 707 # include <execargs.h> 708 # define EXECARGS 1 709 #endif 710 711 #if defined(_lib_pstat) && defined(_sys_pstat) 712 # include <sys/pstat.h> 713 # define PSTAT 1 714 #endif 715 716 #if defined(_lib_fork) && !defined(_NEXT_SOURCE) 717 /* 718 * fix up command line for ps command 719 * mode is 0 for initialization 720 */ 721 static void fixargs(char **argv, int mode) 722 { 723 #if EXECARGS 724 *execargs=(char *)argv; 725 #else 726 static char *buff; 727 static int command_len; 728 register char *cp; 729 int offset=0,size; 730 # ifdef PSTAT 731 union pstun un; 732 if(mode==0) 733 { 734 struct pst_static st; 735 un.pst_static = &st; 736 if(pstat(PSTAT_STATIC, un, sizeof(struct pst_static), 1, 0)<0) 737 return; 738 command_len = st.command_length; 739 return; 740 } 741 stakseek(command_len+2); 742 buff = stakseek(0); 743 # else 744 if(mode==0) 745 { 746 buff = argv[0]; 747 while(cp = *argv++) 748 command_len += strlen(cp)+1; 749 if(environ && *environ==buff+command_len) 750 { 751 for(argv=environ; cp = *argv; cp++) 752 { 753 if(command_len > CMD_LENGTH) 754 { 755 command_len = CMD_LENGTH; 756 break; 757 } 758 *argv++ = strdup(cp); 759 command_len += strlen(cp)+1; 760 } 761 } 762 command_len -= 1; 763 return; 764 } 765 # endif /* PSTAT */ 766 if(command_len==0) 767 return; 768 while((cp = *argv++) && offset < command_len) 769 { 770 if(offset + (size=strlen(cp)) >= command_len) 771 size = command_len - offset; 772 memcpy(buff+offset,cp,size); 773 offset += size; 774 buff[offset++] = ' '; 775 } 776 buff[offset-1] = 0; 777 # ifdef PSTAT 778 un.pst_command = stakptr(0); 779 pstat(PSTAT_SETCMD,un,0,0,0); 780 # endif /* PSTAT */ 781 #endif /* EXECARGS */ 782 } 783 #endif /* _lib_fork */ 784