parser.c revision 142845
11556Srgrimes/*- 21556Srgrimes * Copyright (c) 1991, 1993 31556Srgrimes * The Regents of the University of California. All rights reserved. 41556Srgrimes * 51556Srgrimes * This code is derived from software contributed to Berkeley by 61556Srgrimes * Kenneth Almquist. 71556Srgrimes * 81556Srgrimes * Redistribution and use in source and binary forms, with or without 91556Srgrimes * modification, are permitted provided that the following conditions 101556Srgrimes * are met: 111556Srgrimes * 1. Redistributions of source code must retain the above copyright 121556Srgrimes * notice, this list of conditions and the following disclaimer. 131556Srgrimes * 2. Redistributions in binary form must reproduce the above copyright 141556Srgrimes * notice, this list of conditions and the following disclaimer in the 151556Srgrimes * documentation and/or other materials provided with the distribution. 161556Srgrimes * 4. Neither the name of the University nor the names of its contributors 171556Srgrimes * may be used to endorse or promote products derived from this software 181556Srgrimes * without specific prior written permission. 191556Srgrimes * 201556Srgrimes * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 211556Srgrimes * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 221556Srgrimes * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 231556Srgrimes * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 241556Srgrimes * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 251556Srgrimes * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 261556Srgrimes * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 271556Srgrimes * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 281556Srgrimes * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 291556Srgrimes * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 301556Srgrimes * SUCH DAMAGE. 311556Srgrimes */ 321556Srgrimes 331556Srgrimes#ifndef lint 3436150Scharnier#if 0 3536150Scharnierstatic char sccsid[] = "@(#)parser.c 8.7 (Berkeley) 5/16/95"; 3636150Scharnier#endif 371556Srgrimes#endif /* not lint */ 3899110Sobrien#include <sys/cdefs.h> 3999110Sobrien__FBSDID("$FreeBSD: head/bin/sh/parser.c 142845 2005-03-01 03:35:58Z obrien $"); 401556Srgrimes 4117987Speter#include <stdlib.h> 4217987Speter 431556Srgrimes#include "shell.h" 441556Srgrimes#include "parser.h" 451556Srgrimes#include "nodes.h" 461556Srgrimes#include "expand.h" /* defines rmescapes() */ 471556Srgrimes#include "syntax.h" 481556Srgrimes#include "options.h" 491556Srgrimes#include "input.h" 501556Srgrimes#include "output.h" 511556Srgrimes#include "var.h" 521556Srgrimes#include "error.h" 531556Srgrimes#include "memalloc.h" 541556Srgrimes#include "mystring.h" 551556Srgrimes#include "alias.h" 5617987Speter#include "show.h" 5759436Scracauer#include "eval.h" 5817987Speter#ifndef NO_HISTORY 591556Srgrimes#include "myhistedit.h" 6017987Speter#endif 611556Srgrimes 621556Srgrimes/* 631556Srgrimes * Shell command parser. 641556Srgrimes */ 651556Srgrimes 66142845Sobrien#define EOFMARKLEN 79 67142845Sobrien#define PROMPTLEN 128 681556Srgrimes 691556Srgrimes/* values returned by readtoken */ 7017987Speter#include "token.h" 711556Srgrimes 721556Srgrimes 731556Srgrimes 741556Srgrimesstruct heredoc { 751556Srgrimes struct heredoc *next; /* next here document in list */ 761556Srgrimes union node *here; /* redirection node */ 771556Srgrimes char *eofmark; /* string indicating end of input */ 781556Srgrimes int striptabs; /* if set, strip leading tabs */ 791556Srgrimes}; 801556Srgrimes 811556Srgrimes 821556Srgrimes 83117261SddsSTATIC struct heredoc *heredoclist; /* list of here documents to read */ 84117261SddsSTATIC int parsebackquote; /* nonzero if we are inside backquotes */ 85117261SddsSTATIC int doprompt; /* if set, prompt the user */ 86117261SddsSTATIC int needprompt; /* true if interactive and at start of line */ 87117261SddsSTATIC int lasttoken; /* last token read */ 881556SrgrimesMKINIT int tokpushback; /* last token pushed back */ 89117261SddsSTATIC char *wordtext; /* text of last word returned by readtoken */ 901556SrgrimesMKINIT int checkkwd; /* 1 == check for kwds, 2 == also eat newlines */ 91117261SddsSTATIC struct nodelist *backquotelist; 92117261SddsSTATIC union node *redirnode; 93117261SddsSTATIC struct heredoc *heredoc; 94117261SddsSTATIC int quoteflag; /* set if (part of) last token was quoted */ 95117261SddsSTATIC int startlinno; /* line # where last token started */ 961556Srgrimes 9718018Speter/* XXX When 'noaliases' is set to one, no alias expansion takes place. */ 9818018Speterstatic int noaliases = 0; 991556Srgrimes 1001556Srgrimes#define GDB_HACK 1 /* avoid local declarations which gdb can't handle */ 1011556Srgrimes#ifdef GDB_HACK 1021556Srgrimesstatic const char argvars[5] = {CTLVAR, VSNORMAL|VSQUOTE, '@', '=', '\0'}; 1031556Srgrimesstatic const char types[] = "}-+?="; 1041556Srgrimes#endif 1051556Srgrimes 1061556Srgrimes 10790111SimpSTATIC union node *list(int); 10890111SimpSTATIC union node *andor(void); 10990111SimpSTATIC union node *pipeline(void); 11090111SimpSTATIC union node *command(void); 11190111SimpSTATIC union node *simplecmd(union node **, union node *); 11290111SimpSTATIC union node *makename(void); 11390111SimpSTATIC void parsefname(void); 11490111SimpSTATIC void parseheredoc(void); 11590111SimpSTATIC int peektoken(void); 11690111SimpSTATIC int readtoken(void); 11790111SimpSTATIC int xxreadtoken(void); 11890111SimpSTATIC int readtoken1(int, char const *, char *, int); 11990111SimpSTATIC int noexpand(char *); 12090111SimpSTATIC void synexpect(int); 12190111SimpSTATIC void synerror(char *); 12290111SimpSTATIC void setprompt(int); 1231556Srgrimes 12417987Speter 1251556Srgrimes/* 1261556Srgrimes * Read and parse a command. Returns NEOF on end of file. (NULL is a 1271556Srgrimes * valid parse tree indicating a blank line.) 1281556Srgrimes */ 1291556Srgrimes 1301556Srgrimesunion node * 13190111Simpparsecmd(int interact) 13217987Speter{ 1331556Srgrimes int t; 1341556Srgrimes 13560593Scracauer tokpushback = 0; 1361556Srgrimes doprompt = interact; 1371556Srgrimes if (doprompt) 1381556Srgrimes setprompt(1); 1391556Srgrimes else 1401556Srgrimes setprompt(0); 1411556Srgrimes needprompt = 0; 1421556Srgrimes t = readtoken(); 1431556Srgrimes if (t == TEOF) 1441556Srgrimes return NEOF; 1451556Srgrimes if (t == TNL) 1461556Srgrimes return NULL; 1471556Srgrimes tokpushback++; 1481556Srgrimes return list(1); 1491556Srgrimes} 1501556Srgrimes 1511556Srgrimes 1521556SrgrimesSTATIC union node * 15390111Simplist(int nlflag) 15417987Speter{ 1551556Srgrimes union node *n1, *n2, *n3; 15617987Speter int tok; 1571556Srgrimes 1581556Srgrimes checkkwd = 2; 1591556Srgrimes if (nlflag == 0 && tokendlist[peektoken()]) 1601556Srgrimes return NULL; 16117987Speter n1 = NULL; 1621556Srgrimes for (;;) { 16317987Speter n2 = andor(); 16417987Speter tok = readtoken(); 16517987Speter if (tok == TBACKGND) { 16617987Speter if (n2->type == NCMD || n2->type == NPIPE) { 16717987Speter n2->ncmd.backgnd = 1; 16817987Speter } else if (n2->type == NREDIR) { 16917987Speter n2->type = NBACKGND; 17017987Speter } else { 17117987Speter n3 = (union node *)stalloc(sizeof (struct nredir)); 17217987Speter n3->type = NBACKGND; 17317987Speter n3->nredir.n = n2; 17417987Speter n3->nredir.redirect = NULL; 17517987Speter n2 = n3; 17617987Speter } 17717987Speter } 17817987Speter if (n1 == NULL) { 17917987Speter n1 = n2; 18017987Speter } 18117987Speter else { 18217987Speter n3 = (union node *)stalloc(sizeof (struct nbinary)); 18317987Speter n3->type = NSEMI; 18417987Speter n3->nbinary.ch1 = n1; 18517987Speter n3->nbinary.ch2 = n2; 18617987Speter n1 = n3; 18717987Speter } 18817987Speter switch (tok) { 18913882Sjoerg case TBACKGND: 19017987Speter case TSEMI: 19117987Speter tok = readtoken(); 192102410Scharnier /* FALLTHROUGH */ 1931556Srgrimes case TNL: 19417987Speter if (tok == TNL) { 19517987Speter parseheredoc(); 19617987Speter if (nlflag) 19717987Speter return n1; 19817987Speter } else { 19917987Speter tokpushback++; 20017987Speter } 2011556Srgrimes checkkwd = 2; 2021556Srgrimes if (tokendlist[peektoken()]) 2031556Srgrimes return n1; 2041556Srgrimes break; 2051556Srgrimes case TEOF: 2061556Srgrimes if (heredoclist) 2071556Srgrimes parseheredoc(); 2081556Srgrimes else 2091556Srgrimes pungetc(); /* push back EOF on input */ 2101556Srgrimes return n1; 2111556Srgrimes default: 2121556Srgrimes if (nlflag) 2131556Srgrimes synexpect(-1); 2141556Srgrimes tokpushback++; 2151556Srgrimes return n1; 2161556Srgrimes } 2171556Srgrimes } 2181556Srgrimes} 2191556Srgrimes 2201556Srgrimes 2211556Srgrimes 2221556SrgrimesSTATIC union node * 22390111Simpandor(void) 22490111Simp{ 2251556Srgrimes union node *n1, *n2, *n3; 2261556Srgrimes int t; 2271556Srgrimes 2281556Srgrimes n1 = pipeline(); 2291556Srgrimes for (;;) { 2301556Srgrimes if ((t = readtoken()) == TAND) { 2311556Srgrimes t = NAND; 2321556Srgrimes } else if (t == TOR) { 2331556Srgrimes t = NOR; 2341556Srgrimes } else { 2351556Srgrimes tokpushback++; 2361556Srgrimes return n1; 2371556Srgrimes } 2381556Srgrimes n2 = pipeline(); 2391556Srgrimes n3 = (union node *)stalloc(sizeof (struct nbinary)); 2401556Srgrimes n3->type = t; 2411556Srgrimes n3->nbinary.ch1 = n1; 2421556Srgrimes n3->nbinary.ch2 = n2; 2431556Srgrimes n1 = n3; 2441556Srgrimes } 2451556Srgrimes} 2461556Srgrimes 2471556Srgrimes 2481556Srgrimes 2491556SrgrimesSTATIC union node * 25090111Simppipeline(void) 25190111Simp{ 25275336Sbrian union node *n1, *n2, *pipenode; 2531556Srgrimes struct nodelist *lp, *prev; 25475336Sbrian int negate; 2551556Srgrimes 25675336Sbrian negate = 0; 2571556Srgrimes TRACE(("pipeline: entered\n")); 25875336Sbrian while (readtoken() == TNOT) 25975336Sbrian negate = !negate; 26075336Sbrian tokpushback++; 2611556Srgrimes n1 = command(); 2621556Srgrimes if (readtoken() == TPIPE) { 2631556Srgrimes pipenode = (union node *)stalloc(sizeof (struct npipe)); 2641556Srgrimes pipenode->type = NPIPE; 2651556Srgrimes pipenode->npipe.backgnd = 0; 2661556Srgrimes lp = (struct nodelist *)stalloc(sizeof (struct nodelist)); 2671556Srgrimes pipenode->npipe.cmdlist = lp; 2681556Srgrimes lp->n = n1; 2691556Srgrimes do { 2701556Srgrimes prev = lp; 2711556Srgrimes lp = (struct nodelist *)stalloc(sizeof (struct nodelist)); 2721556Srgrimes lp->n = command(); 2731556Srgrimes prev->next = lp; 2741556Srgrimes } while (readtoken() == TPIPE); 2751556Srgrimes lp->next = NULL; 2761556Srgrimes n1 = pipenode; 2771556Srgrimes } 2781556Srgrimes tokpushback++; 27975336Sbrian if (negate) { 28075336Sbrian n2 = (union node *)stalloc(sizeof (struct nnot)); 28175336Sbrian n2->type = NNOT; 28275336Sbrian n2->nnot.com = n1; 28375336Sbrian return n2; 28475336Sbrian } else 28575336Sbrian return n1; 2861556Srgrimes} 2871556Srgrimes 2881556Srgrimes 2891556Srgrimes 2901556SrgrimesSTATIC union node * 29190111Simpcommand(void) 29290111Simp{ 2931556Srgrimes union node *n1, *n2; 2941556Srgrimes union node *ap, **app; 2951556Srgrimes union node *cp, **cpp; 2961556Srgrimes union node *redir, **rpp; 29775160Sbrian int t, negate = 0; 2981556Srgrimes 2991556Srgrimes checkkwd = 2; 30017987Speter redir = NULL; 30117987Speter n1 = NULL; 3021556Srgrimes rpp = &redir; 30320425Ssteve 3041556Srgrimes /* Check for redirection which may precede command */ 3051556Srgrimes while (readtoken() == TREDIR) { 3061556Srgrimes *rpp = n2 = redirnode; 3071556Srgrimes rpp = &n2->nfile.next; 3081556Srgrimes parsefname(); 3091556Srgrimes } 3101556Srgrimes tokpushback++; 3111556Srgrimes 31275160Sbrian while (readtoken() == TNOT) { 31375160Sbrian TRACE(("command: TNOT recognized\n")); 31475160Sbrian negate = !negate; 31575160Sbrian } 31675160Sbrian tokpushback++; 31775160Sbrian 3181556Srgrimes switch (readtoken()) { 3191556Srgrimes case TIF: 3201556Srgrimes n1 = (union node *)stalloc(sizeof (struct nif)); 3211556Srgrimes n1->type = NIF; 322104554Stjr if ((n1->nif.test = list(0)) == NULL) 323104554Stjr synexpect(-1); 3241556Srgrimes if (readtoken() != TTHEN) 3251556Srgrimes synexpect(TTHEN); 3261556Srgrimes n1->nif.ifpart = list(0); 3271556Srgrimes n2 = n1; 3281556Srgrimes while (readtoken() == TELIF) { 3291556Srgrimes n2->nif.elsepart = (union node *)stalloc(sizeof (struct nif)); 3301556Srgrimes n2 = n2->nif.elsepart; 3311556Srgrimes n2->type = NIF; 332104554Stjr if ((n2->nif.test = list(0)) == NULL) 333104554Stjr synexpect(-1); 3341556Srgrimes if (readtoken() != TTHEN) 3351556Srgrimes synexpect(TTHEN); 3361556Srgrimes n2->nif.ifpart = list(0); 3371556Srgrimes } 3381556Srgrimes if (lasttoken == TELSE) 3391556Srgrimes n2->nif.elsepart = list(0); 3401556Srgrimes else { 3411556Srgrimes n2->nif.elsepart = NULL; 3421556Srgrimes tokpushback++; 3431556Srgrimes } 3441556Srgrimes if (readtoken() != TFI) 3451556Srgrimes synexpect(TFI); 3461556Srgrimes checkkwd = 1; 3471556Srgrimes break; 3481556Srgrimes case TWHILE: 3491556Srgrimes case TUNTIL: { 3501556Srgrimes int got; 3511556Srgrimes n1 = (union node *)stalloc(sizeof (struct nbinary)); 3521556Srgrimes n1->type = (lasttoken == TWHILE)? NWHILE : NUNTIL; 353104554Stjr if ((n1->nbinary.ch1 = list(0)) == NULL) 354104554Stjr synexpect(-1); 3551556Srgrimes if ((got=readtoken()) != TDO) { 3561556SrgrimesTRACE(("expecting DO got %s %s\n", tokname[got], got == TWORD ? wordtext : "")); 3571556Srgrimes synexpect(TDO); 3581556Srgrimes } 3591556Srgrimes n1->nbinary.ch2 = list(0); 3601556Srgrimes if (readtoken() != TDONE) 3611556Srgrimes synexpect(TDONE); 3621556Srgrimes checkkwd = 1; 3631556Srgrimes break; 3641556Srgrimes } 3651556Srgrimes case TFOR: 3661556Srgrimes if (readtoken() != TWORD || quoteflag || ! goodname(wordtext)) 3671556Srgrimes synerror("Bad for loop variable"); 3681556Srgrimes n1 = (union node *)stalloc(sizeof (struct nfor)); 3691556Srgrimes n1->type = NFOR; 3701556Srgrimes n1->nfor.var = wordtext; 3711556Srgrimes if (readtoken() == TWORD && ! quoteflag && equal(wordtext, "in")) { 3721556Srgrimes app = ≈ 3731556Srgrimes while (readtoken() == TWORD) { 3741556Srgrimes n2 = (union node *)stalloc(sizeof (struct narg)); 3751556Srgrimes n2->type = NARG; 3761556Srgrimes n2->narg.text = wordtext; 3771556Srgrimes n2->narg.backquote = backquotelist; 3781556Srgrimes *app = n2; 3791556Srgrimes app = &n2->narg.next; 3801556Srgrimes } 3811556Srgrimes *app = NULL; 3821556Srgrimes n1->nfor.args = ap; 3831556Srgrimes if (lasttoken != TNL && lasttoken != TSEMI) 3841556Srgrimes synexpect(-1); 3851556Srgrimes } else { 3861556Srgrimes#ifndef GDB_HACK 3871556Srgrimes static const char argvars[5] = {CTLVAR, VSNORMAL|VSQUOTE, 3881556Srgrimes '@', '=', '\0'}; 3891556Srgrimes#endif 3901556Srgrimes n2 = (union node *)stalloc(sizeof (struct narg)); 3911556Srgrimes n2->type = NARG; 3921556Srgrimes n2->narg.text = (char *)argvars; 3931556Srgrimes n2->narg.backquote = NULL; 3941556Srgrimes n2->narg.next = NULL; 3951556Srgrimes n1->nfor.args = n2; 3961556Srgrimes /* 3971556Srgrimes * Newline or semicolon here is optional (but note 3981556Srgrimes * that the original Bourne shell only allowed NL). 3991556Srgrimes */ 4001556Srgrimes if (lasttoken != TNL && lasttoken != TSEMI) 4011556Srgrimes tokpushback++; 4021556Srgrimes } 4031556Srgrimes checkkwd = 2; 4041556Srgrimes if ((t = readtoken()) == TDO) 4051556Srgrimes t = TDONE; 4061556Srgrimes else if (t == TBEGIN) 4071556Srgrimes t = TEND; 4081556Srgrimes else 4091556Srgrimes synexpect(-1); 4101556Srgrimes n1->nfor.body = list(0); 4111556Srgrimes if (readtoken() != t) 4121556Srgrimes synexpect(t); 4131556Srgrimes checkkwd = 1; 4141556Srgrimes break; 4151556Srgrimes case TCASE: 4161556Srgrimes n1 = (union node *)stalloc(sizeof (struct ncase)); 4171556Srgrimes n1->type = NCASE; 4181556Srgrimes if (readtoken() != TWORD) 4191556Srgrimes synexpect(TWORD); 4201556Srgrimes n1->ncase.expr = n2 = (union node *)stalloc(sizeof (struct narg)); 4211556Srgrimes n2->type = NARG; 4221556Srgrimes n2->narg.text = wordtext; 4231556Srgrimes n2->narg.backquote = backquotelist; 4241556Srgrimes n2->narg.next = NULL; 4251556Srgrimes while (readtoken() == TNL); 4261556Srgrimes if (lasttoken != TWORD || ! equal(wordtext, "in")) 4271556Srgrimes synerror("expecting \"in\""); 4281556Srgrimes cpp = &n1->ncase.cases; 42918018Speter noaliases = 1; /* turn off alias expansion */ 4302760Ssef checkkwd = 2, readtoken(); 431104202Stjr while (lasttoken != TESAC) { 4321556Srgrimes *cpp = cp = (union node *)stalloc(sizeof (struct nclist)); 4331556Srgrimes cp->type = NCLIST; 4341556Srgrimes app = &cp->nclist.pattern; 435104207Stjr if (lasttoken == TLP) 436104207Stjr readtoken(); 4371556Srgrimes for (;;) { 4381556Srgrimes *app = ap = (union node *)stalloc(sizeof (struct narg)); 4391556Srgrimes ap->type = NARG; 4401556Srgrimes ap->narg.text = wordtext; 4411556Srgrimes ap->narg.backquote = backquotelist; 4422760Ssef if (checkkwd = 2, readtoken() != TPIPE) 4431556Srgrimes break; 4441556Srgrimes app = &ap->narg.next; 4452760Ssef readtoken(); 4461556Srgrimes } 4471556Srgrimes ap->narg.next = NULL; 4481556Srgrimes if (lasttoken != TRP) 44918018Speter noaliases = 0, synexpect(TRP); 4501556Srgrimes cp->nclist.body = list(0); 4512760Ssef 4522760Ssef checkkwd = 2; 4532760Ssef if ((t = readtoken()) != TESAC) { 4542760Ssef if (t != TENDCASE) 45518018Speter noaliases = 0, synexpect(TENDCASE); 4562760Ssef else 4572760Ssef checkkwd = 2, readtoken(); 4582760Ssef } 4591556Srgrimes cpp = &cp->nclist.next; 460104202Stjr } 46118018Speter noaliases = 0; /* reset alias expansion */ 4621556Srgrimes *cpp = NULL; 4631556Srgrimes checkkwd = 1; 4641556Srgrimes break; 4651556Srgrimes case TLP: 4661556Srgrimes n1 = (union node *)stalloc(sizeof (struct nredir)); 4671556Srgrimes n1->type = NSUBSHELL; 4681556Srgrimes n1->nredir.n = list(0); 4691556Srgrimes n1->nredir.redirect = NULL; 4701556Srgrimes if (readtoken() != TRP) 4711556Srgrimes synexpect(TRP); 4721556Srgrimes checkkwd = 1; 4731556Srgrimes break; 4741556Srgrimes case TBEGIN: 4751556Srgrimes n1 = list(0); 4761556Srgrimes if (readtoken() != TEND) 4771556Srgrimes synexpect(TEND); 4781556Srgrimes checkkwd = 1; 4791556Srgrimes break; 4801556Srgrimes /* Handle an empty command like other simple commands. */ 48117987Speter case TSEMI: 482101662Stjr case TAND: 483101662Stjr case TOR: 48417987Speter /* 48517987Speter * An empty command before a ; doesn't make much sense, and 48617987Speter * should certainly be disallowed in the case of `if ;'. 48717987Speter */ 48817987Speter if (!redir) 48917987Speter synexpect(-1); 4901556Srgrimes case TNL: 49110399Sjoerg case TEOF: 4921556Srgrimes case TWORD: 49317987Speter case TRP: 4941556Srgrimes tokpushback++; 49575160Sbrian n1 = simplecmd(rpp, redir); 49675160Sbrian goto checkneg; 4971556Srgrimes default: 4981556Srgrimes synexpect(-1); 4991556Srgrimes } 5001556Srgrimes 5011556Srgrimes /* Now check for redirection which may follow command */ 5021556Srgrimes while (readtoken() == TREDIR) { 5031556Srgrimes *rpp = n2 = redirnode; 5041556Srgrimes rpp = &n2->nfile.next; 5051556Srgrimes parsefname(); 5061556Srgrimes } 5071556Srgrimes tokpushback++; 5081556Srgrimes *rpp = NULL; 5091556Srgrimes if (redir) { 5101556Srgrimes if (n1->type != NSUBSHELL) { 5111556Srgrimes n2 = (union node *)stalloc(sizeof (struct nredir)); 5121556Srgrimes n2->type = NREDIR; 5131556Srgrimes n2->nredir.n = n1; 5141556Srgrimes n1 = n2; 5151556Srgrimes } 5161556Srgrimes n1->nredir.redirect = redir; 5171556Srgrimes } 51875160Sbrian 51975160Sbriancheckneg: 52075160Sbrian if (negate) { 52175160Sbrian n2 = (union node *)stalloc(sizeof (struct nnot)); 52275160Sbrian n2->type = NNOT; 52375160Sbrian n2->nnot.com = n1; 52475160Sbrian return n2; 52575160Sbrian } 52675160Sbrian else 52775160Sbrian return n1; 5281556Srgrimes} 5291556Srgrimes 5301556Srgrimes 5311556SrgrimesSTATIC union node * 53290111Simpsimplecmd(union node **rpp, union node *redir) 53390111Simp{ 5341556Srgrimes union node *args, **app; 5351556Srgrimes union node **orig_rpp = rpp; 53675160Sbrian union node *n = NULL, *n2; 53775160Sbrian int negate = 0; 5381556Srgrimes 5391556Srgrimes /* If we don't have any redirections already, then we must reset */ 5401556Srgrimes /* rpp to be the address of the local redir variable. */ 5411556Srgrimes if (redir == 0) 5421556Srgrimes rpp = &redir; 5431556Srgrimes 5441556Srgrimes args = NULL; 5451556Srgrimes app = &args; 5468855Srgrimes /* 5471556Srgrimes * We save the incoming value, because we need this for shell 5481556Srgrimes * functions. There can not be a redirect or an argument between 5498855Srgrimes * the function name and the open parenthesis. 5501556Srgrimes */ 5511556Srgrimes orig_rpp = rpp; 5521556Srgrimes 55375160Sbrian while (readtoken() == TNOT) { 55475160Sbrian TRACE(("command: TNOT recognized\n")); 55575160Sbrian negate = !negate; 55675160Sbrian } 55775160Sbrian tokpushback++; 55875160Sbrian 5591556Srgrimes for (;;) { 5601556Srgrimes if (readtoken() == TWORD) { 5611556Srgrimes n = (union node *)stalloc(sizeof (struct narg)); 5621556Srgrimes n->type = NARG; 5631556Srgrimes n->narg.text = wordtext; 5641556Srgrimes n->narg.backquote = backquotelist; 5651556Srgrimes *app = n; 5661556Srgrimes app = &n->narg.next; 5671556Srgrimes } else if (lasttoken == TREDIR) { 5681556Srgrimes *rpp = n = redirnode; 5691556Srgrimes rpp = &n->nfile.next; 5701556Srgrimes parsefname(); /* read name of redirection file */ 5711556Srgrimes } else if (lasttoken == TLP && app == &args->narg.next 5721556Srgrimes && rpp == orig_rpp) { 5731556Srgrimes /* We have a function */ 5741556Srgrimes if (readtoken() != TRP) 5751556Srgrimes synexpect(TRP); 5761556Srgrimes#ifdef notdef 5771556Srgrimes if (! goodname(n->narg.text)) 5781556Srgrimes synerror("Bad function name"); 5791556Srgrimes#endif 5801556Srgrimes n->type = NDEFUN; 5811556Srgrimes n->narg.next = command(); 58275160Sbrian goto checkneg; 5831556Srgrimes } else { 5841556Srgrimes tokpushback++; 5851556Srgrimes break; 5861556Srgrimes } 5871556Srgrimes } 5881556Srgrimes *app = NULL; 5891556Srgrimes *rpp = NULL; 5901556Srgrimes n = (union node *)stalloc(sizeof (struct ncmd)); 5911556Srgrimes n->type = NCMD; 5921556Srgrimes n->ncmd.backgnd = 0; 5931556Srgrimes n->ncmd.args = args; 5941556Srgrimes n->ncmd.redirect = redir; 59575160Sbrian 59675160Sbriancheckneg: 59775160Sbrian if (negate) { 59875160Sbrian n2 = (union node *)stalloc(sizeof (struct nnot)); 59975160Sbrian n2->type = NNOT; 60075160Sbrian n2->nnot.com = n; 60175160Sbrian return n2; 60275160Sbrian } 60375160Sbrian else 60475160Sbrian return n; 6051556Srgrimes} 6061556Srgrimes 60717987SpeterSTATIC union node * 60890111Simpmakename(void) 60990111Simp{ 61017987Speter union node *n; 6111556Srgrimes 61217987Speter n = (union node *)stalloc(sizeof (struct narg)); 61317987Speter n->type = NARG; 61417987Speter n->narg.next = NULL; 61517987Speter n->narg.text = wordtext; 61617987Speter n->narg.backquote = backquotelist; 61717987Speter return n; 61817987Speter} 61917987Speter 62090111Simpvoid fixredir(union node *n, const char *text, int err) 62190111Simp{ 62217987Speter TRACE(("Fix redir %s %d\n", text, err)); 62317987Speter if (!err) 62417987Speter n->ndup.vname = NULL; 62517987Speter 62617987Speter if (is_digit(text[0]) && text[1] == '\0') 62717987Speter n->ndup.dupfd = digit_val(text[0]); 62817987Speter else if (text[0] == '-' && text[1] == '\0') 62917987Speter n->ndup.dupfd = -1; 63017987Speter else { 63120425Ssteve 63217987Speter if (err) 63317987Speter synerror("Bad fd number"); 63417987Speter else 63517987Speter n->ndup.vname = makename(); 63617987Speter } 63717987Speter} 63817987Speter 63917987Speter 6401556SrgrimesSTATIC void 64190111Simpparsefname(void) 64290111Simp{ 6431556Srgrimes union node *n = redirnode; 6441556Srgrimes 6451556Srgrimes if (readtoken() != TWORD) 6461556Srgrimes synexpect(-1); 6471556Srgrimes if (n->type == NHERE) { 6481556Srgrimes struct heredoc *here = heredoc; 6491556Srgrimes struct heredoc *p; 6501556Srgrimes int i; 6511556Srgrimes 6521556Srgrimes if (quoteflag == 0) 6531556Srgrimes n->type = NXHERE; 6541556Srgrimes TRACE(("Here document %d\n", n->type)); 6551556Srgrimes if (here->striptabs) { 6561556Srgrimes while (*wordtext == '\t') 6571556Srgrimes wordtext++; 6581556Srgrimes } 6591556Srgrimes if (! noexpand(wordtext) || (i = strlen(wordtext)) == 0 || i > EOFMARKLEN) 6601556Srgrimes synerror("Illegal eof marker for << redirection"); 6611556Srgrimes rmescapes(wordtext); 6621556Srgrimes here->eofmark = wordtext; 6631556Srgrimes here->next = NULL; 6641556Srgrimes if (heredoclist == NULL) 6651556Srgrimes heredoclist = here; 6661556Srgrimes else { 6671556Srgrimes for (p = heredoclist ; p->next ; p = p->next); 6681556Srgrimes p->next = here; 6691556Srgrimes } 6701556Srgrimes } else if (n->type == NTOFD || n->type == NFROMFD) { 67117987Speter fixredir(n, wordtext, 0); 6721556Srgrimes } else { 67317987Speter n->nfile.fname = makename(); 6741556Srgrimes } 6751556Srgrimes} 6761556Srgrimes 6771556Srgrimes 6781556Srgrimes/* 6791556Srgrimes * Input any here documents. 6801556Srgrimes */ 6811556Srgrimes 6821556SrgrimesSTATIC void 68390111Simpparseheredoc(void) 68490111Simp{ 6851556Srgrimes struct heredoc *here; 6861556Srgrimes union node *n; 6871556Srgrimes 6881556Srgrimes while (heredoclist) { 6891556Srgrimes here = heredoclist; 6901556Srgrimes heredoclist = here->next; 6911556Srgrimes if (needprompt) { 6921556Srgrimes setprompt(2); 6931556Srgrimes needprompt = 0; 6941556Srgrimes } 6951556Srgrimes readtoken1(pgetc(), here->here->type == NHERE? SQSYNTAX : DQSYNTAX, 6961556Srgrimes here->eofmark, here->striptabs); 6971556Srgrimes n = (union node *)stalloc(sizeof (struct narg)); 6981556Srgrimes n->narg.type = NARG; 6991556Srgrimes n->narg.next = NULL; 7001556Srgrimes n->narg.text = wordtext; 7011556Srgrimes n->narg.backquote = backquotelist; 7021556Srgrimes here->here->nhere.doc = n; 7031556Srgrimes } 7041556Srgrimes} 7051556Srgrimes 7061556SrgrimesSTATIC int 70790111Simppeektoken(void) 70890111Simp{ 7091556Srgrimes int t; 7101556Srgrimes 7111556Srgrimes t = readtoken(); 7121556Srgrimes tokpushback++; 7131556Srgrimes return (t); 7141556Srgrimes} 7151556Srgrimes 7161556SrgrimesSTATIC int 71790111Simpreadtoken(void) 71890111Simp{ 7191556Srgrimes int t; 7201556Srgrimes int savecheckkwd = checkkwd; 7211556Srgrimes struct alias *ap; 7221556Srgrimes#ifdef DEBUG 7231556Srgrimes int alreadyseen = tokpushback; 7241556Srgrimes#endif 7258855Srgrimes 7261556Srgrimes top: 7271556Srgrimes t = xxreadtoken(); 7281556Srgrimes 7291556Srgrimes if (checkkwd) { 7301556Srgrimes /* 7311556Srgrimes * eat newlines 7321556Srgrimes */ 7331556Srgrimes if (checkkwd == 2) { 7341556Srgrimes checkkwd = 0; 7351556Srgrimes while (t == TNL) { 7361556Srgrimes parseheredoc(); 7371556Srgrimes t = xxreadtoken(); 7381556Srgrimes } 7391556Srgrimes } else 7401556Srgrimes checkkwd = 0; 7411556Srgrimes /* 7421556Srgrimes * check for keywords and aliases 7431556Srgrimes */ 74420425Ssteve if (t == TWORD && !quoteflag) 74517987Speter { 74698463Sjmallett const char * const *pp; 7471556Srgrimes 74898463Sjmallett for (pp = parsekwd; *pp; pp++) { 74920425Ssteve if (**pp == *wordtext && equal(*pp, wordtext)) 75017987Speter { 7511556Srgrimes lasttoken = t = pp - parsekwd + KWDOFFSET; 7521556Srgrimes TRACE(("keyword %s recognized\n", tokname[t])); 7531556Srgrimes goto out; 7541556Srgrimes } 7551556Srgrimes } 75618018Speter if (noaliases == 0 && 75718018Speter (ap = lookupalias(wordtext, 1)) != NULL) { 7581556Srgrimes pushstring(ap->val, strlen(ap->val), ap); 7591556Srgrimes checkkwd = savecheckkwd; 7601556Srgrimes goto top; 7611556Srgrimes } 7621556Srgrimes } 7631556Srgrimesout: 76475160Sbrian checkkwd = (t == TNOT) ? savecheckkwd : 0; 7651556Srgrimes } 7661556Srgrimes#ifdef DEBUG 7671556Srgrimes if (!alreadyseen) 7681556Srgrimes TRACE(("token %s %s\n", tokname[t], t == TWORD ? wordtext : "")); 7691556Srgrimes else 7701556Srgrimes TRACE(("reread token %s %s\n", tokname[t], t == TWORD ? wordtext : "")); 7711556Srgrimes#endif 7721556Srgrimes return (t); 7731556Srgrimes} 7741556Srgrimes 7751556Srgrimes 7761556Srgrimes/* 7771556Srgrimes * Read the next input token. 7781556Srgrimes * If the token is a word, we set backquotelist to the list of cmds in 7791556Srgrimes * backquotes. We set quoteflag to true if any part of the word was 7801556Srgrimes * quoted. 7811556Srgrimes * If the token is TREDIR, then we set redirnode to a structure containing 7821556Srgrimes * the redirection. 7831556Srgrimes * In all cases, the variable startlinno is set to the number of the line 7841556Srgrimes * on which the token starts. 7851556Srgrimes * 7861556Srgrimes * [Change comment: here documents and internal procedures] 7871556Srgrimes * [Readtoken shouldn't have any arguments. Perhaps we should make the 7881556Srgrimes * word parsing code into a separate routine. In this case, readtoken 7891556Srgrimes * doesn't need to have any internal procedures, but parseword does. 7901556Srgrimes * We could also make parseoperator in essence the main routine, and 7911556Srgrimes * have parseword (readtoken1?) handle both words and redirection.] 7921556Srgrimes */ 7931556Srgrimes 7941556Srgrimes#define RETURN(token) return lasttoken = token 7951556Srgrimes 7961556SrgrimesSTATIC int 79790111Simpxxreadtoken(void) 79890111Simp{ 79925230Ssteve int c; 8001556Srgrimes 8011556Srgrimes if (tokpushback) { 8021556Srgrimes tokpushback = 0; 8031556Srgrimes return lasttoken; 8041556Srgrimes } 8051556Srgrimes if (needprompt) { 8061556Srgrimes setprompt(2); 8071556Srgrimes needprompt = 0; 8081556Srgrimes } 8091556Srgrimes startlinno = plinno; 8101556Srgrimes for (;;) { /* until token or start of word found */ 8111556Srgrimes c = pgetc_macro(); 8121556Srgrimes if (c == ' ' || c == '\t') 8131556Srgrimes continue; /* quick check for white space first */ 8141556Srgrimes switch (c) { 8151556Srgrimes case ' ': case '\t': 8161556Srgrimes continue; 8171556Srgrimes case '#': 8181556Srgrimes while ((c = pgetc()) != '\n' && c != PEOF); 8191556Srgrimes pungetc(); 8201556Srgrimes continue; 8211556Srgrimes case '\\': 8221556Srgrimes if (pgetc() == '\n') { 8231556Srgrimes startlinno = ++plinno; 8241556Srgrimes if (doprompt) 8251556Srgrimes setprompt(2); 8261556Srgrimes else 8271556Srgrimes setprompt(0); 8281556Srgrimes continue; 8291556Srgrimes } 8301556Srgrimes pungetc(); 8311556Srgrimes goto breakloop; 8321556Srgrimes case '\n': 8331556Srgrimes plinno++; 8341556Srgrimes needprompt = doprompt; 8351556Srgrimes RETURN(TNL); 8361556Srgrimes case PEOF: 8371556Srgrimes RETURN(TEOF); 8381556Srgrimes case '&': 8391556Srgrimes if (pgetc() == '&') 8401556Srgrimes RETURN(TAND); 8411556Srgrimes pungetc(); 8421556Srgrimes RETURN(TBACKGND); 8431556Srgrimes case '|': 8441556Srgrimes if (pgetc() == '|') 8451556Srgrimes RETURN(TOR); 8461556Srgrimes pungetc(); 8471556Srgrimes RETURN(TPIPE); 8481556Srgrimes case ';': 8491556Srgrimes if (pgetc() == ';') 8501556Srgrimes RETURN(TENDCASE); 8511556Srgrimes pungetc(); 8521556Srgrimes RETURN(TSEMI); 8531556Srgrimes case '(': 8541556Srgrimes RETURN(TLP); 8551556Srgrimes case ')': 8561556Srgrimes RETURN(TRP); 8571556Srgrimes default: 8581556Srgrimes goto breakloop; 8591556Srgrimes } 8601556Srgrimes } 8611556Srgrimesbreakloop: 8621556Srgrimes return readtoken1(c, BASESYNTAX, (char *)NULL, 0); 8631556Srgrimes#undef RETURN 8641556Srgrimes} 8651556Srgrimes 8661556Srgrimes 8671556Srgrimes 8681556Srgrimes/* 8691556Srgrimes * If eofmark is NULL, read a word or a redirection symbol. If eofmark 8701556Srgrimes * is not NULL, read a here document. In the latter case, eofmark is the 8711556Srgrimes * word which marks the end of the document and striptabs is true if 8721556Srgrimes * leading tabs should be stripped from the document. The argument firstc 8731556Srgrimes * is the first character of the input token or document. 8741556Srgrimes * 8751556Srgrimes * Because C does not have internal subroutines, I have simulated them 8761556Srgrimes * using goto's to implement the subroutine linkage. The following macros 8771556Srgrimes * will run code that appears at the end of readtoken1. 8781556Srgrimes */ 8791556Srgrimes 8801556Srgrimes#define CHECKEND() {goto checkend; checkend_return:;} 8811556Srgrimes#define PARSEREDIR() {goto parseredir; parseredir_return:;} 8821556Srgrimes#define PARSESUB() {goto parsesub; parsesub_return:;} 8831556Srgrimes#define PARSEBACKQOLD() {oldstyle = 1; goto parsebackq; parsebackq_oldreturn:;} 8841556Srgrimes#define PARSEBACKQNEW() {oldstyle = 0; goto parsebackq; parsebackq_newreturn:;} 8851556Srgrimes#define PARSEARITH() {goto parsearith; parsearith_return:;} 8861556Srgrimes 8871556SrgrimesSTATIC int 88890111Simpreadtoken1(int firstc, char const *syntax, char *eofmark, int striptabs) 88990111Simp{ 89017987Speter int c = firstc; 89117987Speter char *out; 8921556Srgrimes int len; 8931556Srgrimes char line[EOFMARKLEN + 1]; 8941556Srgrimes struct nodelist *bqlist; 8951556Srgrimes int quotef; 8961556Srgrimes int dblquote; 8971556Srgrimes int varnest; /* levels of variables expansion */ 8981556Srgrimes int arinest; /* levels of arithmetic expansion */ 8991556Srgrimes int parenlevel; /* levels of parens in arithmetic */ 9001556Srgrimes int oldstyle; 9011556Srgrimes char const *prevsyntax; /* syntax before arithmetic */ 90254679Scracauer int synentry; 90317987Speter#if __GNUC__ 90417987Speter /* Avoid longjmp clobbering */ 90517987Speter (void) &out; 90617987Speter (void) "ef; 90717987Speter (void) &dblquote; 90817987Speter (void) &varnest; 90917987Speter (void) &arinest; 91017987Speter (void) &parenlevel; 91117987Speter (void) &oldstyle; 91217987Speter (void) &prevsyntax; 91317987Speter (void) &syntax; 91454679Scracauer (void) &synentry; 91517987Speter#endif 9161556Srgrimes 9171556Srgrimes startlinno = plinno; 9181556Srgrimes dblquote = 0; 9191556Srgrimes if (syntax == DQSYNTAX) 9201556Srgrimes dblquote = 1; 9211556Srgrimes quotef = 0; 9221556Srgrimes bqlist = NULL; 9231556Srgrimes varnest = 0; 9241556Srgrimes arinest = 0; 9251556Srgrimes parenlevel = 0; 9261556Srgrimes 9271556Srgrimes STARTSTACKSTR(out); 9281556Srgrimes loop: { /* for each line, until end of word */ 9291556Srgrimes CHECKEND(); /* set c to PEOF if at end of here document */ 9301556Srgrimes for (;;) { /* until end of line or end of word */ 9311556Srgrimes CHECKSTRSPACE(3, out); /* permit 3 calls to USTPUTC */ 93254679Scracauer 93364705Scracauer synentry = syntax[c]; 93454679Scracauer 93554679Scracauer switch(synentry) { 9361556Srgrimes case CNL: /* '\n' */ 9371556Srgrimes if (syntax == BASESYNTAX) 9381556Srgrimes goto endword; /* exit outer loop */ 9391556Srgrimes USTPUTC(c, out); 9401556Srgrimes plinno++; 9411556Srgrimes if (doprompt) 9421556Srgrimes setprompt(2); 9431556Srgrimes else 9441556Srgrimes setprompt(0); 9451556Srgrimes c = pgetc(); 9461556Srgrimes goto loop; /* continue outer loop */ 9471556Srgrimes case CWORD: 9481556Srgrimes USTPUTC(c, out); 9491556Srgrimes break; 9501556Srgrimes case CCTL: 9511556Srgrimes if (eofmark == NULL || dblquote) 9521556Srgrimes USTPUTC(CTLESC, out); 9531556Srgrimes USTPUTC(c, out); 9541556Srgrimes break; 9551556Srgrimes case CBACK: /* backslash */ 9561556Srgrimes c = pgetc(); 9571556Srgrimes if (c == PEOF) { 9581556Srgrimes USTPUTC('\\', out); 9591556Srgrimes pungetc(); 9601556Srgrimes } else if (c == '\n') { 9611556Srgrimes if (doprompt) 9621556Srgrimes setprompt(2); 9631556Srgrimes else 9641556Srgrimes setprompt(0); 9651556Srgrimes } else { 96654631Scracauer if (dblquote && c != '\\' && 96754631Scracauer c != '`' && c != '$' && 96854631Scracauer (c != '"' || eofmark != NULL)) 9691556Srgrimes USTPUTC('\\', out); 97083675Stegge if (SQSYNTAX[c] == CCTL) 9711556Srgrimes USTPUTC(CTLESC, out); 97239137Stegge else if (eofmark == NULL) 97338887Stegge USTPUTC(CTLQUOTEMARK, out); 9741556Srgrimes USTPUTC(c, out); 9751556Srgrimes quotef++; 9761556Srgrimes } 9771556Srgrimes break; 9781556Srgrimes case CSQUOTE: 97939137Stegge if (eofmark == NULL) 98039137Stegge USTPUTC(CTLQUOTEMARK, out); 9811556Srgrimes syntax = SQSYNTAX; 9821556Srgrimes break; 9831556Srgrimes case CDQUOTE: 98439137Stegge if (eofmark == NULL) 98539137Stegge USTPUTC(CTLQUOTEMARK, out); 9861556Srgrimes syntax = DQSYNTAX; 9871556Srgrimes dblquote = 1; 9881556Srgrimes break; 9891556Srgrimes case CENDQUOTE: 99039137Stegge if (eofmark != NULL && arinest == 0 && 99139137Stegge varnest == 0) { 9921556Srgrimes USTPUTC(c, out); 9931556Srgrimes } else { 99439137Stegge if (arinest) { 9951556Srgrimes syntax = ARISYNTAX; 99639137Stegge dblquote = 0; 99739137Stegge } else if (eofmark == NULL) { 9981556Srgrimes syntax = BASESYNTAX; 99939137Stegge dblquote = 0; 100039137Stegge } 10011556Srgrimes quotef++; 10021556Srgrimes } 10031556Srgrimes break; 10041556Srgrimes case CVAR: /* '$' */ 10051556Srgrimes PARSESUB(); /* parse substitution */ 10061556Srgrimes break; 10071556Srgrimes case CENDVAR: /* '}' */ 10081556Srgrimes if (varnest > 0) { 10091556Srgrimes varnest--; 10101556Srgrimes USTPUTC(CTLENDVAR, out); 10111556Srgrimes } else { 10121556Srgrimes USTPUTC(c, out); 10131556Srgrimes } 10141556Srgrimes break; 10151556Srgrimes case CLP: /* '(' in arithmetic */ 10161556Srgrimes parenlevel++; 10171556Srgrimes USTPUTC(c, out); 10181556Srgrimes break; 10191556Srgrimes case CRP: /* ')' in arithmetic */ 10201556Srgrimes if (parenlevel > 0) { 10211556Srgrimes USTPUTC(c, out); 10221556Srgrimes --parenlevel; 10231556Srgrimes } else { 10241556Srgrimes if (pgetc() == ')') { 10251556Srgrimes if (--arinest == 0) { 10261556Srgrimes USTPUTC(CTLENDARI, out); 10271556Srgrimes syntax = prevsyntax; 102839137Stegge if (syntax == DQSYNTAX) 102939137Stegge dblquote = 1; 103039137Stegge else 103139137Stegge dblquote = 0; 10321556Srgrimes } else 10331556Srgrimes USTPUTC(')', out); 10341556Srgrimes } else { 10358855Srgrimes /* 10361556Srgrimes * unbalanced parens 10371556Srgrimes * (don't 2nd guess - no error) 10381556Srgrimes */ 10391556Srgrimes pungetc(); 10401556Srgrimes USTPUTC(')', out); 10411556Srgrimes } 10421556Srgrimes } 10431556Srgrimes break; 10441556Srgrimes case CBQUOTE: /* '`' */ 10451556Srgrimes PARSEBACKQOLD(); 10461556Srgrimes break; 10471556Srgrimes case CEOF: 10481556Srgrimes goto endword; /* exit outer loop */ 10491556Srgrimes default: 10501556Srgrimes if (varnest == 0) 10511556Srgrimes goto endword; /* exit outer loop */ 10521556Srgrimes USTPUTC(c, out); 10531556Srgrimes } 10541556Srgrimes c = pgetc_macro(); 10551556Srgrimes } 10561556Srgrimes } 10571556Srgrimesendword: 10581556Srgrimes if (syntax == ARISYNTAX) 10591556Srgrimes synerror("Missing '))'"); 10601556Srgrimes if (syntax != BASESYNTAX && ! parsebackquote && eofmark == NULL) 10611556Srgrimes synerror("Unterminated quoted string"); 10621556Srgrimes if (varnest != 0) { 10631556Srgrimes startlinno = plinno; 10641556Srgrimes synerror("Missing '}'"); 10651556Srgrimes } 10661556Srgrimes USTPUTC('\0', out); 10671556Srgrimes len = out - stackblock(); 10681556Srgrimes out = stackblock(); 10691556Srgrimes if (eofmark == NULL) { 10701556Srgrimes if ((c == '>' || c == '<') 10711556Srgrimes && quotef == 0 10721556Srgrimes && len <= 2 10731556Srgrimes && (*out == '\0' || is_digit(*out))) { 10741556Srgrimes PARSEREDIR(); 10751556Srgrimes return lasttoken = TREDIR; 10761556Srgrimes } else { 10771556Srgrimes pungetc(); 10781556Srgrimes } 10791556Srgrimes } 10801556Srgrimes quoteflag = quotef; 10811556Srgrimes backquotelist = bqlist; 10821556Srgrimes grabstackblock(len); 10831556Srgrimes wordtext = out; 10841556Srgrimes return lasttoken = TWORD; 10851556Srgrimes/* end of readtoken routine */ 10861556Srgrimes 10871556Srgrimes 10881556Srgrimes 10891556Srgrimes/* 10901556Srgrimes * Check to see whether we are at the end of the here document. When this 10911556Srgrimes * is called, c is set to the first character of the next input line. If 10921556Srgrimes * we are at the end of the here document, this routine sets the c to PEOF. 10931556Srgrimes */ 10941556Srgrimes 10951556Srgrimescheckend: { 10961556Srgrimes if (eofmark) { 10971556Srgrimes if (striptabs) { 10981556Srgrimes while (c == '\t') 10991556Srgrimes c = pgetc(); 11001556Srgrimes } 11011556Srgrimes if (c == *eofmark) { 11021556Srgrimes if (pfgets(line, sizeof line) != NULL) { 110325230Ssteve char *p, *q; 11041556Srgrimes 11051556Srgrimes p = line; 11061556Srgrimes for (q = eofmark + 1 ; *q && *p == *q ; p++, q++); 11071556Srgrimes if (*p == '\n' && *q == '\0') { 11081556Srgrimes c = PEOF; 11091556Srgrimes plinno++; 11101556Srgrimes needprompt = doprompt; 11111556Srgrimes } else { 11121556Srgrimes pushstring(line, strlen(line), NULL); 11131556Srgrimes } 11141556Srgrimes } 11151556Srgrimes } 11161556Srgrimes } 11171556Srgrimes goto checkend_return; 11181556Srgrimes} 11191556Srgrimes 11201556Srgrimes 11211556Srgrimes/* 11221556Srgrimes * Parse a redirection operator. The variable "out" points to a string 11231556Srgrimes * specifying the fd to be redirected. The variable "c" contains the 11241556Srgrimes * first character of the redirection operator. 11251556Srgrimes */ 11261556Srgrimes 11271556Srgrimesparseredir: { 11281556Srgrimes char fd = *out; 11291556Srgrimes union node *np; 11301556Srgrimes 11311556Srgrimes np = (union node *)stalloc(sizeof (struct nfile)); 11321556Srgrimes if (c == '>') { 11331556Srgrimes np->nfile.fd = 1; 11341556Srgrimes c = pgetc(); 11351556Srgrimes if (c == '>') 11361556Srgrimes np->type = NAPPEND; 11371556Srgrimes else if (c == '&') 11381556Srgrimes np->type = NTOFD; 113996922Stjr else if (c == '|') 114096922Stjr np->type = NCLOBBER; 11411556Srgrimes else { 11421556Srgrimes np->type = NTO; 11431556Srgrimes pungetc(); 11441556Srgrimes } 11451556Srgrimes } else { /* c == '<' */ 11461556Srgrimes np->nfile.fd = 0; 11471556Srgrimes c = pgetc(); 11481556Srgrimes if (c == '<') { 11491556Srgrimes if (sizeof (struct nfile) != sizeof (struct nhere)) { 11501556Srgrimes np = (union node *)stalloc(sizeof (struct nhere)); 11511556Srgrimes np->nfile.fd = 0; 11521556Srgrimes } 11531556Srgrimes np->type = NHERE; 11541556Srgrimes heredoc = (struct heredoc *)stalloc(sizeof (struct heredoc)); 11551556Srgrimes heredoc->here = np; 11561556Srgrimes if ((c = pgetc()) == '-') { 11571556Srgrimes heredoc->striptabs = 1; 11581556Srgrimes } else { 11591556Srgrimes heredoc->striptabs = 0; 11601556Srgrimes pungetc(); 11611556Srgrimes } 11621556Srgrimes } else if (c == '&') 11631556Srgrimes np->type = NFROMFD; 116466612Sbrian else if (c == '>') 116566612Sbrian np->type = NFROMTO; 11661556Srgrimes else { 11671556Srgrimes np->type = NFROM; 11681556Srgrimes pungetc(); 11691556Srgrimes } 11701556Srgrimes } 11711556Srgrimes if (fd != '\0') 11721556Srgrimes np->nfile.fd = digit_val(fd); 11731556Srgrimes redirnode = np; 11741556Srgrimes goto parseredir_return; 11751556Srgrimes} 11761556Srgrimes 11771556Srgrimes 11781556Srgrimes/* 11791556Srgrimes * Parse a substitution. At this point, we have read the dollar sign 11801556Srgrimes * and nothing else. 11811556Srgrimes */ 11821556Srgrimes 11831556Srgrimesparsesub: { 11841556Srgrimes int subtype; 11851556Srgrimes int typeloc; 11861556Srgrimes int flags; 11871556Srgrimes char *p; 11881556Srgrimes#ifndef GDB_HACK 11891556Srgrimes static const char types[] = "}-+?="; 11901556Srgrimes#endif 119118202Speter int bracketed_name = 0; /* used to handle ${[0-9]*} variables */ 11921556Srgrimes 11931556Srgrimes c = pgetc(); 11941556Srgrimes if (c != '(' && c != '{' && !is_name(c) && !is_special(c)) { 11951556Srgrimes USTPUTC('$', out); 11961556Srgrimes pungetc(); 11971556Srgrimes } else if (c == '(') { /* $(command) or $((arith)) */ 11981556Srgrimes if (pgetc() == '(') { 11991556Srgrimes PARSEARITH(); 12001556Srgrimes } else { 12011556Srgrimes pungetc(); 12021556Srgrimes PARSEBACKQNEW(); 12031556Srgrimes } 12041556Srgrimes } else { 12051556Srgrimes USTPUTC(CTLVAR, out); 12061556Srgrimes typeloc = out - stackblock(); 12071556Srgrimes USTPUTC(VSNORMAL, out); 12081556Srgrimes subtype = VSNORMAL; 12091556Srgrimes if (c == '{') { 121018202Speter bracketed_name = 1; 12111556Srgrimes c = pgetc(); 121217987Speter if (c == '#') { 121317987Speter if ((c = pgetc()) == '}') 121417987Speter c = '#'; 121517987Speter else 121617987Speter subtype = VSLENGTH; 121717987Speter } 121817987Speter else 121917987Speter subtype = 0; 12201556Srgrimes } 12211556Srgrimes if (is_name(c)) { 12221556Srgrimes do { 12231556Srgrimes STPUTC(c, out); 12241556Srgrimes c = pgetc(); 12251556Srgrimes } while (is_in_name(c)); 122618202Speter } else if (is_digit(c)) { 122718202Speter if (bracketed_name) { 122818202Speter do { 122918202Speter STPUTC(c, out); 123018202Speter c = pgetc(); 123118202Speter } while (is_digit(c)); 123218202Speter } else { 123318202Speter STPUTC(c, out); 123418202Speter c = pgetc(); 123518202Speter } 12361556Srgrimes } else { 12371556Srgrimes if (! is_special(c)) 12381556Srgrimesbadsub: synerror("Bad substitution"); 12391556Srgrimes USTPUTC(c, out); 12401556Srgrimes c = pgetc(); 12411556Srgrimes } 12421556Srgrimes STPUTC('=', out); 12431556Srgrimes flags = 0; 12441556Srgrimes if (subtype == 0) { 124517987Speter switch (c) { 124617987Speter case ':': 12471556Srgrimes flags = VSNUL; 12481556Srgrimes c = pgetc(); 124917987Speter /*FALLTHROUGH*/ 125017987Speter default: 125117987Speter p = strchr(types, c); 125217987Speter if (p == NULL) 125317987Speter goto badsub; 125417987Speter subtype = p - types + VSNORMAL; 125517987Speter break; 125617987Speter case '%': 125720425Ssteve case '#': 125817987Speter { 125917987Speter int cc = c; 126017987Speter subtype = c == '#' ? VSTRIMLEFT : 126117987Speter VSTRIMRIGHT; 126217987Speter c = pgetc(); 126317987Speter if (c == cc) 126417987Speter subtype++; 126517987Speter else 126617987Speter pungetc(); 126717987Speter break; 126817987Speter } 12691556Srgrimes } 12701556Srgrimes } else { 12711556Srgrimes pungetc(); 12721556Srgrimes } 127357225Scracauer if (subtype != VSLENGTH && (dblquote || arinest)) 12741556Srgrimes flags |= VSQUOTE; 12751556Srgrimes *(stackblock() + typeloc) = subtype | flags; 12761556Srgrimes if (subtype != VSNORMAL) 12771556Srgrimes varnest++; 12781556Srgrimes } 12791556Srgrimes goto parsesub_return; 12801556Srgrimes} 12811556Srgrimes 12821556Srgrimes 12831556Srgrimes/* 12841556Srgrimes * Called to parse command substitutions. Newstyle is set if the command 12851556Srgrimes * is enclosed inside $(...); nlpp is a pointer to the head of the linked 12861556Srgrimes * list of commands (passed by reference), and savelen is the number of 12871556Srgrimes * characters on the top of the stack which must be preserved. 12881556Srgrimes */ 12891556Srgrimes 12901556Srgrimesparsebackq: { 12911556Srgrimes struct nodelist **nlpp; 12921556Srgrimes int savepbq; 12931556Srgrimes union node *n; 12941556Srgrimes char *volatile str; 12951556Srgrimes struct jmploc jmploc; 12961556Srgrimes struct jmploc *volatile savehandler; 12971556Srgrimes int savelen; 129820425Ssteve int saveprompt; 129920425Ssteve#if __GNUC__ 130020425Ssteve /* Avoid longjmp clobbering */ 130120425Ssteve (void) &saveprompt; 130220425Ssteve#endif 13031556Srgrimes 13041556Srgrimes savepbq = parsebackquote; 13051556Srgrimes if (setjmp(jmploc.loc)) { 13061556Srgrimes if (str) 13071556Srgrimes ckfree(str); 13081556Srgrimes parsebackquote = 0; 13091556Srgrimes handler = savehandler; 13101556Srgrimes longjmp(handler->loc, 1); 13111556Srgrimes } 13121556Srgrimes INTOFF; 13131556Srgrimes str = NULL; 13141556Srgrimes savelen = out - stackblock(); 13151556Srgrimes if (savelen > 0) { 13161556Srgrimes str = ckmalloc(savelen); 131717987Speter memcpy(str, stackblock(), savelen); 13181556Srgrimes } 13191556Srgrimes savehandler = handler; 13201556Srgrimes handler = &jmploc; 13211556Srgrimes INTON; 13221556Srgrimes if (oldstyle) { 13231556Srgrimes /* We must read until the closing backquote, giving special 13241556Srgrimes treatment to some slashes, and then push the string and 13251556Srgrimes reread it as input, interpreting it normally. */ 132625230Ssteve char *out; 132725230Ssteve int c; 13281556Srgrimes int savelen; 13291556Srgrimes char *str; 13308855Srgrimes 133120425Ssteve 13321556Srgrimes STARTSTACKSTR(out); 133320425Ssteve for (;;) { 133420425Ssteve if (needprompt) { 133520425Ssteve setprompt(2); 133620425Ssteve needprompt = 0; 133720425Ssteve } 133820425Ssteve switch (c = pgetc()) { 133920425Ssteve case '`': 134020425Ssteve goto done; 134120425Ssteve 134220425Ssteve case '\\': 134320425Ssteve if ((c = pgetc()) == '\n') { 134420425Ssteve plinno++; 134520425Ssteve if (doprompt) 134620425Ssteve setprompt(2); 134720425Ssteve else 134820425Ssteve setprompt(0); 134920425Ssteve /* 135020425Ssteve * If eating a newline, avoid putting 135120425Ssteve * the newline into the new character 135220425Ssteve * stream (via the STPUTC after the 135320425Ssteve * switch). 135420425Ssteve */ 135520425Ssteve continue; 135620425Ssteve } 135717987Speter if (c != '\\' && c != '`' && c != '$' 13581556Srgrimes && (!dblquote || c != '"')) 13591556Srgrimes STPUTC('\\', out); 136020425Ssteve break; 136120425Ssteve 136220425Ssteve case '\n': 136320425Ssteve plinno++; 136420425Ssteve needprompt = doprompt; 136520425Ssteve break; 136620425Ssteve 136720425Ssteve case PEOF: 136820425Ssteve startlinno = plinno; 136920425Ssteve synerror("EOF in backquote substitution"); 137020425Ssteve break; 137120425Ssteve 137220425Ssteve default: 137320425Ssteve break; 137420425Ssteve } 137520425Ssteve STPUTC(c, out); 13761556Srgrimes } 137720425Sstevedone: 13781556Srgrimes STPUTC('\0', out); 13791556Srgrimes savelen = out - stackblock(); 13801556Srgrimes if (savelen > 0) { 13811556Srgrimes str = ckmalloc(savelen); 138217987Speter memcpy(str, stackblock(), savelen); 138317987Speter setinputstring(str, 1); 13841556Srgrimes } 13851556Srgrimes } 13861556Srgrimes nlpp = &bqlist; 13871556Srgrimes while (*nlpp) 13881556Srgrimes nlpp = &(*nlpp)->next; 13891556Srgrimes *nlpp = (struct nodelist *)stalloc(sizeof (struct nodelist)); 13901556Srgrimes (*nlpp)->next = NULL; 13911556Srgrimes parsebackquote = oldstyle; 139220425Ssteve 139320425Ssteve if (oldstyle) { 139420425Ssteve saveprompt = doprompt; 139520425Ssteve doprompt = 0; 139620425Ssteve } 139720425Ssteve 13981556Srgrimes n = list(0); 139920425Ssteve 140020425Ssteve if (oldstyle) 140120425Ssteve doprompt = saveprompt; 140220425Ssteve else { 140320425Ssteve if (readtoken() != TRP) 140420425Ssteve synexpect(TRP); 140520425Ssteve } 140620425Ssteve 14071556Srgrimes (*nlpp)->n = n; 140820425Ssteve if (oldstyle) { 140920425Ssteve /* 141020425Ssteve * Start reading from old file again, ignoring any pushed back 141120425Ssteve * tokens left from the backquote parsing 141220425Ssteve */ 14131556Srgrimes popfile(); 141420425Ssteve tokpushback = 0; 141520425Ssteve } 14161556Srgrimes while (stackblocksize() <= savelen) 14171556Srgrimes growstackblock(); 14181556Srgrimes STARTSTACKSTR(out); 14191556Srgrimes if (str) { 142017987Speter memcpy(out, str, savelen); 14211556Srgrimes STADJUST(savelen, out); 14221556Srgrimes INTOFF; 14231556Srgrimes ckfree(str); 14241556Srgrimes str = NULL; 14251556Srgrimes INTON; 14261556Srgrimes } 14271556Srgrimes parsebackquote = savepbq; 14281556Srgrimes handler = savehandler; 14291556Srgrimes if (arinest || dblquote) 14301556Srgrimes USTPUTC(CTLBACKQ | CTLQUOTE, out); 14311556Srgrimes else 14321556Srgrimes USTPUTC(CTLBACKQ, out); 14331556Srgrimes if (oldstyle) 14341556Srgrimes goto parsebackq_oldreturn; 14351556Srgrimes else 14361556Srgrimes goto parsebackq_newreturn; 14371556Srgrimes} 14381556Srgrimes 14391556Srgrimes/* 14401556Srgrimes * Parse an arithmetic expansion (indicate start of one and set state) 14411556Srgrimes */ 14421556Srgrimesparsearith: { 14431556Srgrimes 14441556Srgrimes if (++arinest == 1) { 14451556Srgrimes prevsyntax = syntax; 14461556Srgrimes syntax = ARISYNTAX; 14471556Srgrimes USTPUTC(CTLARI, out); 144838887Stegge if (dblquote) 144938887Stegge USTPUTC('"',out); 145038887Stegge else 145138887Stegge USTPUTC(' ',out); 14521556Srgrimes } else { 14531556Srgrimes /* 14541556Srgrimes * we collapse embedded arithmetic expansion to 14551556Srgrimes * parenthesis, which should be equivalent 14561556Srgrimes */ 14571556Srgrimes USTPUTC('(', out); 14581556Srgrimes } 14591556Srgrimes goto parsearith_return; 14601556Srgrimes} 14611556Srgrimes 14621556Srgrimes} /* end of readtoken */ 14631556Srgrimes 14641556Srgrimes 14651556Srgrimes 14661556Srgrimes#ifdef mkinit 14671556SrgrimesRESET { 14681556Srgrimes tokpushback = 0; 14691556Srgrimes checkkwd = 0; 14701556Srgrimes} 14711556Srgrimes#endif 14721556Srgrimes 14731556Srgrimes/* 14741556Srgrimes * Returns true if the text contains nothing to expand (no dollar signs 14751556Srgrimes * or backquotes). 14761556Srgrimes */ 14771556Srgrimes 14781556SrgrimesSTATIC int 147990111Simpnoexpand(char *text) 148090111Simp{ 148125230Ssteve char *p; 148225230Ssteve char c; 14831556Srgrimes 14841556Srgrimes p = text; 14851556Srgrimes while ((c = *p++) != '\0') { 148639137Stegge if ( c == CTLQUOTEMARK) 148739137Stegge continue; 14881556Srgrimes if (c == CTLESC) 14891556Srgrimes p++; 149083675Stegge else if (BASESYNTAX[(int)c] == CCTL) 14911556Srgrimes return 0; 14921556Srgrimes } 14931556Srgrimes return 1; 14941556Srgrimes} 14951556Srgrimes 14961556Srgrimes 14971556Srgrimes/* 14981556Srgrimes * Return true if the argument is a legal variable name (a letter or 14991556Srgrimes * underscore followed by zero or more letters, underscores, and digits). 15001556Srgrimes */ 15011556Srgrimes 15021556Srgrimesint 150390111Simpgoodname(char *name) 150490111Simp{ 150525230Ssteve char *p; 15061556Srgrimes 15071556Srgrimes p = name; 15081556Srgrimes if (! is_name(*p)) 15091556Srgrimes return 0; 15101556Srgrimes while (*++p) { 15111556Srgrimes if (! is_in_name(*p)) 15121556Srgrimes return 0; 15131556Srgrimes } 15141556Srgrimes return 1; 15151556Srgrimes} 15161556Srgrimes 15171556Srgrimes 15181556Srgrimes/* 15191556Srgrimes * Called when an unexpected token is read during the parse. The argument 15201556Srgrimes * is the token that is expected, or -1 if more than one type of token can 15211556Srgrimes * occur at this point. 15221556Srgrimes */ 15231556Srgrimes 15241556SrgrimesSTATIC void 152590111Simpsynexpect(int token) 152617987Speter{ 15271556Srgrimes char msg[64]; 15281556Srgrimes 15291556Srgrimes if (token >= 0) { 15301556Srgrimes fmtstr(msg, 64, "%s unexpected (expecting %s)", 15311556Srgrimes tokname[lasttoken], tokname[token]); 15321556Srgrimes } else { 15331556Srgrimes fmtstr(msg, 64, "%s unexpected", tokname[lasttoken]); 15341556Srgrimes } 15351556Srgrimes synerror(msg); 15361556Srgrimes} 15371556Srgrimes 15381556Srgrimes 15391556SrgrimesSTATIC void 154090111Simpsynerror(char *msg) 154190111Simp{ 15421556Srgrimes if (commandname) 15431556Srgrimes outfmt(&errout, "%s: %d: ", commandname, startlinno); 15441556Srgrimes outfmt(&errout, "Syntax error: %s\n", msg); 15451556Srgrimes error((char *)NULL); 15461556Srgrimes} 15471556Srgrimes 15481556SrgrimesSTATIC void 154990111Simpsetprompt(int which) 155090111Simp{ 15511556Srgrimes whichprompt = which; 15521556Srgrimes 155317987Speter#ifndef NO_HISTORY 15541556Srgrimes if (!el) 155517987Speter#endif 15561556Srgrimes out2str(getprompt(NULL)); 15571556Srgrimes} 15581556Srgrimes 15591556Srgrimes/* 15601556Srgrimes * called by editline -- any expansions to the prompt 15611556Srgrimes * should be added here. 15621556Srgrimes */ 15631556Srgrimeschar * 156490111Simpgetprompt(void *unused __unused) 156525905Ssteve{ 1566142845Sobrien static char ps[PROMPTLEN]; 1567142845Sobrien char *fmt; 1568142845Sobrien int i, j, trim; 1569142845Sobrien 1570142845Sobrien /* 1571142845Sobrien * Select prompt format. 1572142845Sobrien */ 15731556Srgrimes switch (whichprompt) { 15741556Srgrimes case 0: 1575142845Sobrien fmt = ""; 1576142845Sobrien break; 15771556Srgrimes case 1: 1578142845Sobrien fmt = ps1val(); 1579142845Sobrien break; 15801556Srgrimes case 2: 1581142845Sobrien fmt = ps2val(); 1582142845Sobrien break; 15831556Srgrimes default: 15841556Srgrimes return "<internal prompt error>"; 15851556Srgrimes } 1586142845Sobrien 1587142845Sobrien /* 1588142845Sobrien * Format prompt string. 1589142845Sobrien */ 1590142845Sobrien for (i = 0; (i < 127) && (*fmt != '\0'); i++, fmt++) 1591142845Sobrien if (*fmt == '\\') 1592142845Sobrien switch (*++fmt) { 1593142845Sobrien 1594142845Sobrien /* 1595142845Sobrien * Hostname. 1596142845Sobrien * 1597142845Sobrien * \h specifies just the local hostname, 1598142845Sobrien * \H specifies fully-qualified hostname. 1599142845Sobrien */ 1600142845Sobrien case 'h': 1601142845Sobrien case 'H': 1602142845Sobrien ps[i] == '\0'; 1603142845Sobrien gethostname(&ps[i], PROMPTLEN - i); 1604142845Sobrien /* Skip to end of hostname. */ 1605142845Sobrien trim = (*fmt == 'h') ? '.' : '\0'; 1606142845Sobrien while ((ps[i+1] != '\0') && (ps[i+1] != trim)) 1607142845Sobrien i++; 1608142845Sobrien break; 1609142845Sobrien 1610142845Sobrien /* 1611142845Sobrien * Working directory. 1612142845Sobrien * 1613142845Sobrien * \W specifies just the final component, 1614142845Sobrien * \w specifies the entire path. 1615142845Sobrien */ 1616142845Sobrien case 'W': 1617142845Sobrien case 'w': 1618142845Sobrien ps[i] == '\0'; 1619142845Sobrien getcwd(&ps[i], PROMPTLEN - i); 1620142845Sobrien if (*fmt == 'W') { 1621142845Sobrien /* Final path component only. */ 1622142845Sobrien trim = 1; 1623142845Sobrien for (j = i; ps[j] != '\0'; j++) 1624142845Sobrien if (ps[j] == '/') 1625142845Sobrien trim = j + 1; 1626142845Sobrien memmove(&ps[i], &ps[trim], 1627142845Sobrien j - trim + 1); 1628142845Sobrien } 1629142845Sobrien /* Skip to end of path. */ 1630142845Sobrien while (ps[i + 1] != '\0') 1631142845Sobrien i++; 1632142845Sobrien break; 1633142845Sobrien 1634142845Sobrien /* 1635142845Sobrien * Superuser status. 1636142845Sobrien * 1637142845Sobrien * '$' for normal users, '#' for root. 1638142845Sobrien */ 1639142845Sobrien case '$': 1640142845Sobrien ps[i] = (geteuid() != 0) ? '$' : '#'; 1641142845Sobrien break; 1642142845Sobrien 1643142845Sobrien /* 1644142845Sobrien * A literal \. 1645142845Sobrien */ 1646142845Sobrien case '\\': 1647142845Sobrien ps[i] = '\\'; 1648142845Sobrien break; 1649142845Sobrien 1650142845Sobrien /* 1651142845Sobrien * Emit unrecognized formats verbatim. 1652142845Sobrien */ 1653142845Sobrien default: 1654142845Sobrien ps[i++] = '\\'; 1655142845Sobrien ps[i] = *fmt; 1656142845Sobrien break; 1657142845Sobrien } 1658142845Sobrien else 1659142845Sobrien ps[i] = *fmt; 1660142845Sobrien ps[i] = '\0'; 1661142845Sobrien return (ps); 16621556Srgrimes} 1663