expand.c revision 223010
11556Srgrimes/*- 21556Srgrimes * Copyright (c) 1991, 1993 31556Srgrimes * The Regents of the University of California. All rights reserved. 4207944Sjilles * Copyright (c) 1997-2005 5207944Sjilles * Herbert Xu <herbert@gondor.apana.org.au>. All rights reserved. 61556Srgrimes * 71556Srgrimes * This code is derived from software contributed to Berkeley by 81556Srgrimes * Kenneth Almquist. 91556Srgrimes * 101556Srgrimes * Redistribution and use in source and binary forms, with or without 111556Srgrimes * modification, are permitted provided that the following conditions 121556Srgrimes * are met: 131556Srgrimes * 1. Redistributions of source code must retain the above copyright 141556Srgrimes * notice, this list of conditions and the following disclaimer. 151556Srgrimes * 2. Redistributions in binary form must reproduce the above copyright 161556Srgrimes * notice, this list of conditions and the following disclaimer in the 171556Srgrimes * documentation and/or other materials provided with the distribution. 181556Srgrimes * 4. Neither the name of the University nor the names of its contributors 191556Srgrimes * may be used to endorse or promote products derived from this software 201556Srgrimes * without specific prior written permission. 211556Srgrimes * 221556Srgrimes * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 231556Srgrimes * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 241556Srgrimes * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 251556Srgrimes * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 261556Srgrimes * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 271556Srgrimes * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 281556Srgrimes * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 291556Srgrimes * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 301556Srgrimes * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 311556Srgrimes * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 321556Srgrimes * SUCH DAMAGE. 331556Srgrimes */ 341556Srgrimes 351556Srgrimes#ifndef lint 3636150Scharnier#if 0 3736150Scharnierstatic char sccsid[] = "@(#)expand.c 8.5 (Berkeley) 5/15/95"; 3836150Scharnier#endif 391556Srgrimes#endif /* not lint */ 4099110Sobrien#include <sys/cdefs.h> 4199110Sobrien__FBSDID("$FreeBSD: head/bin/sh/expand.c 223010 2011-06-12 12:54:52Z jilles $"); 421556Srgrimes 4317987Speter#include <sys/types.h> 4417987Speter#include <sys/time.h> 4517987Speter#include <sys/stat.h> 46213775Sjhb#include <dirent.h> 4717987Speter#include <errno.h> 48213775Sjhb#include <inttypes.h> 49213775Sjhb#include <limits.h> 5017987Speter#include <pwd.h> 51213775Sjhb#include <stdio.h> 5217987Speter#include <stdlib.h> 53108286Stjr#include <string.h> 54213775Sjhb#include <unistd.h> 55221646Sjilles#include <wchar.h> 5617987Speter 571556Srgrimes/* 581556Srgrimes * Routines to expand arguments to commands. We have to deal with 591556Srgrimes * backquotes, shell variables, and file metacharacters. 601556Srgrimes */ 611556Srgrimes 621556Srgrimes#include "shell.h" 631556Srgrimes#include "main.h" 641556Srgrimes#include "nodes.h" 651556Srgrimes#include "eval.h" 661556Srgrimes#include "expand.h" 671556Srgrimes#include "syntax.h" 681556Srgrimes#include "parser.h" 691556Srgrimes#include "jobs.h" 701556Srgrimes#include "options.h" 711556Srgrimes#include "var.h" 721556Srgrimes#include "input.h" 731556Srgrimes#include "output.h" 741556Srgrimes#include "memalloc.h" 751556Srgrimes#include "error.h" 761556Srgrimes#include "mystring.h" 7717987Speter#include "arith.h" 7817987Speter#include "show.h" 791556Srgrimes 801556Srgrimes/* 811556Srgrimes * Structure specifying which parts of the string should be searched 821556Srgrimes * for IFS characters. 831556Srgrimes */ 841556Srgrimes 851556Srgrimesstruct ifsregion { 861556Srgrimes struct ifsregion *next; /* next region in list */ 871556Srgrimes int begoff; /* offset of start of region */ 881556Srgrimes int endoff; /* offset of end of region */ 89194975Sjilles int inquotes; /* search for nul bytes only */ 901556Srgrimes}; 911556Srgrimes 921556Srgrimes 93213760Sobrienstatic char *expdest; /* output of current string */ 94213760Sobrienstatic struct nodelist *argbackq; /* list of back quote expressions */ 95213760Sobrienstatic struct ifsregion ifsfirst; /* first struct in list of ifs regions */ 96213760Sobrienstatic struct ifsregion *ifslastp; /* last struct in list */ 97213760Sobrienstatic struct arglist exparg; /* holds expanded arg list */ 981556Srgrimes 99213811Sobrienstatic void argstr(char *, int); 100213811Sobrienstatic char *exptilde(char *, int); 101213811Sobrienstatic void expbackq(union node *, int, int); 102214524Sjillesstatic int subevalvar(char *, char *, int, int, int, int, int); 103213811Sobrienstatic char *evalvar(char *, int); 104213811Sobrienstatic int varisset(char *, int); 105213811Sobrienstatic void varvalue(char *, int, int, int); 106213811Sobrienstatic void recordregion(int, int, int); 107213811Sobrienstatic void removerecordregions(int); 108213811Sobrienstatic void ifsbreakup(char *, struct arglist *); 109213811Sobrienstatic void expandmeta(struct strlist *, int); 110213811Sobrienstatic void expmeta(char *, char *); 111213811Sobrienstatic void addfname(char *); 112213811Sobrienstatic struct strlist *expsort(struct strlist *); 113213811Sobrienstatic struct strlist *msort(struct strlist *, int); 114213811Sobrienstatic char *cvtnum(int, char *); 115221646Sjillesstatic int collate_range_cmp(wchar_t, wchar_t); 1161556Srgrimes 117213811Sobrienstatic int 118221646Sjillescollate_range_cmp(wchar_t c1, wchar_t c2) 11919281Sache{ 120221646Sjilles static wchar_t s1[2], s2[2]; 12119281Sache 12219281Sache s1[0] = c1; 12319281Sache s2[0] = c2; 124221646Sjilles return (wcscoll(s1, s2)); 12519281Sache} 12619281Sache 1271556Srgrimes/* 1281556Srgrimes * Expand shell variables and backquotes inside a here document. 12990111Simp * union node *arg the document 13090111Simp * int fd; where to write the expanded version 1311556Srgrimes */ 1321556Srgrimes 1331556Srgrimesvoid 13490111Simpexpandhere(union node *arg, int fd) 13590111Simp{ 1361556Srgrimes expandarg(arg, (struct arglist *)NULL, 0); 13739137Stegge xwrite(fd, stackblock(), expdest - stackblock()); 1381556Srgrimes} 1391556Srgrimes 140216384Sjillesstatic char * 141216384Sjillesstputs_quotes(const char *data, const char *syntax, char *p) 142216384Sjilles{ 143216384Sjilles while (*data) { 144216384Sjilles CHECKSTRSPACE(2, p); 145216384Sjilles if (syntax[(int)*data] == CCTL) 146216384Sjilles USTPUTC(CTLESC, p); 147216384Sjilles USTPUTC(*data++, p); 148216384Sjilles } 149216384Sjilles return (p); 150216384Sjilles} 151216384Sjilles#define STPUTS_QUOTES(data, syntax, p) p = stputs_quotes((data), syntax, p) 1521556Srgrimes 1531556Srgrimes/* 154212243Sjilles * Perform expansions on an argument, placing the resulting list of arguments 155212243Sjilles * in arglist. Parameter expansion, command substitution and arithmetic 156212243Sjilles * expansion are always performed; additional expansions can be requested 157212243Sjilles * via flag (EXP_*). 158212243Sjilles * The result is left in the stack string. 159218203Sjilles * When arglist is NULL, perform here document expansion. 160212243Sjilles * 161212243Sjilles * Caution: this function uses global state and is not reentrant. 162212243Sjilles * However, a new invocation after an interrupted invocation is safe 163212243Sjilles * and will reset the global state for the new call. 1641556Srgrimes */ 1651556Srgrimesvoid 16690111Simpexpandarg(union node *arg, struct arglist *arglist, int flag) 16717987Speter{ 1681556Srgrimes struct strlist *sp; 1691556Srgrimes char *p; 1701556Srgrimes 1711556Srgrimes argbackq = arg->narg.backquote; 1721556Srgrimes STARTSTACKSTR(expdest); 1731556Srgrimes ifsfirst.next = NULL; 1741556Srgrimes ifslastp = NULL; 1751556Srgrimes argstr(arg->narg.text, flag); 1761556Srgrimes if (arglist == NULL) { 177222907Sjilles STACKSTRNUL(expdest); 1781556Srgrimes return; /* here document expanded */ 1791556Srgrimes } 1801556Srgrimes STPUTC('\0', expdest); 1811556Srgrimes p = grabstackstr(expdest); 1821556Srgrimes exparg.lastp = &exparg.list; 1831556Srgrimes /* 1841556Srgrimes * TODO - EXP_REDIR 1851556Srgrimes */ 1861556Srgrimes if (flag & EXP_FULL) { 1871556Srgrimes ifsbreakup(p, &exparg); 1881556Srgrimes *exparg.lastp = NULL; 1891556Srgrimes exparg.lastp = &exparg.list; 1901556Srgrimes expandmeta(exparg.list, flag); 1911556Srgrimes } else { 1921556Srgrimes if (flag & EXP_REDIR) /*XXX - for now, just remove escapes */ 1931556Srgrimes rmescapes(p); 1941556Srgrimes sp = (struct strlist *)stalloc(sizeof (struct strlist)); 1951556Srgrimes sp->text = p; 1961556Srgrimes *exparg.lastp = sp; 1971556Srgrimes exparg.lastp = &sp->next; 1981556Srgrimes } 1991556Srgrimes while (ifsfirst.next != NULL) { 2001556Srgrimes struct ifsregion *ifsp; 2011556Srgrimes INTOFF; 2021556Srgrimes ifsp = ifsfirst.next->next; 2031556Srgrimes ckfree(ifsfirst.next); 2041556Srgrimes ifsfirst.next = ifsp; 2051556Srgrimes INTON; 2061556Srgrimes } 2071556Srgrimes *exparg.lastp = NULL; 2081556Srgrimes if (exparg.list) { 2091556Srgrimes *arglist->lastp = exparg.list; 2101556Srgrimes arglist->lastp = exparg.lastp; 2111556Srgrimes } 2121556Srgrimes} 2131556Srgrimes 2141556Srgrimes 2151556Srgrimes 2161556Srgrimes/* 217212243Sjilles * Perform parameter expansion, command substitution and arithmetic 218212243Sjilles * expansion, and tilde expansion if requested via EXP_TILDE/EXP_VARTILDE. 219212243Sjilles * Processing ends at a CTLENDVAR character as well as '\0'. 220212243Sjilles * This is used to expand word in ${var+word} etc. 221212243Sjilles * If EXP_FULL, EXP_CASE or EXP_REDIR are set, keep and/or generate CTLESC 222212243Sjilles * characters to allow for further processing. 223212243Sjilles * If EXP_FULL is set, also preserve CTLQUOTEMARK characters. 2241556Srgrimes */ 225213811Sobrienstatic void 22690111Simpargstr(char *p, int flag) 22717987Speter{ 22825233Ssteve char c; 229104672Stjr int quotes = flag & (EXP_FULL | EXP_CASE | EXP_REDIR); /* do CTLESC */ 2301556Srgrimes int firsteq = 1; 231214512Sjilles int split_lit; 232214512Sjilles int lit_quoted; 2331556Srgrimes 234214512Sjilles split_lit = flag & EXP_SPLIT_LIT; 235214512Sjilles lit_quoted = flag & EXP_LIT_QUOTED; 236214512Sjilles flag &= ~(EXP_SPLIT_LIT | EXP_LIT_QUOTED); 2371556Srgrimes if (*p == '~' && (flag & (EXP_TILDE | EXP_VARTILDE))) 2381556Srgrimes p = exptilde(p, flag); 2391556Srgrimes for (;;) { 240215783Sjilles CHECKSTRSPACE(2, expdest); 2411556Srgrimes switch (c = *p++) { 2421556Srgrimes case '\0': 243212243Sjilles case CTLENDVAR: 2441556Srgrimes goto breakloop; 24538887Stegge case CTLQUOTEMARK: 246214512Sjilles lit_quoted = 1; 24738887Stegge /* "$@" syntax adherence hack */ 24838887Stegge if (p[0] == CTLVAR && p[2] == '@' && p[3] == '=') 24938887Stegge break; 25039137Stegge if ((flag & EXP_FULL) != 0) 251215783Sjilles USTPUTC(c, expdest); 25238887Stegge break; 253214512Sjilles case CTLQUOTEEND: 254214512Sjilles lit_quoted = 0; 255214512Sjilles break; 2561556Srgrimes case CTLESC: 2571556Srgrimes if (quotes) 258215783Sjilles USTPUTC(c, expdest); 2591556Srgrimes c = *p++; 260215783Sjilles USTPUTC(c, expdest); 261214512Sjilles if (split_lit && !lit_quoted) 262214512Sjilles recordregion(expdest - stackblock() - 263214512Sjilles (quotes ? 2 : 1), 264214512Sjilles expdest - stackblock(), 0); 2651556Srgrimes break; 2661556Srgrimes case CTLVAR: 2671556Srgrimes p = evalvar(p, flag); 2681556Srgrimes break; 2691556Srgrimes case CTLBACKQ: 2701556Srgrimes case CTLBACKQ|CTLQUOTE: 2711556Srgrimes expbackq(argbackq->n, c & CTLQUOTE, flag); 2721556Srgrimes argbackq = argbackq->next; 2731556Srgrimes break; 2741556Srgrimes case CTLENDARI: 2751556Srgrimes expari(flag); 2761556Srgrimes break; 2771556Srgrimes case ':': 2781556Srgrimes case '=': 2791556Srgrimes /* 2801556Srgrimes * sort of a hack - expand tildes in variable 2811556Srgrimes * assignments (after the first '=' and after ':'s). 2821556Srgrimes */ 283215783Sjilles USTPUTC(c, expdest); 284214512Sjilles if (split_lit && !lit_quoted) 285214512Sjilles recordregion(expdest - stackblock() - 1, 286214512Sjilles expdest - stackblock(), 0); 287214512Sjilles if (flag & EXP_VARTILDE && *p == '~' && 288214512Sjilles (c != '=' || firsteq)) { 289214512Sjilles if (c == '=') 290214512Sjilles firsteq = 0; 2911556Srgrimes p = exptilde(p, flag); 2921556Srgrimes } 2931556Srgrimes break; 2941556Srgrimes default: 295215783Sjilles USTPUTC(c, expdest); 296214512Sjilles if (split_lit && !lit_quoted) 297214512Sjilles recordregion(expdest - stackblock() - 1, 298214512Sjilles expdest - stackblock(), 0); 2991556Srgrimes } 3001556Srgrimes } 3011556Srgrimesbreakloop:; 3021556Srgrimes} 3031556Srgrimes 304212243Sjilles/* 305212243Sjilles * Perform tilde expansion, placing the result in the stack string and 306212243Sjilles * returning the next position in the input string to process. 307212243Sjilles */ 308213811Sobrienstatic char * 30990111Simpexptilde(char *p, int flag) 31017987Speter{ 3111556Srgrimes char c, *startp = p; 3121556Srgrimes struct passwd *pw; 3131556Srgrimes char *home; 314108935Stjr int quotes = flag & (EXP_FULL | EXP_CASE | EXP_REDIR); 3151556Srgrimes 31617987Speter while ((c = *p) != '\0') { 3171556Srgrimes switch(c) { 318200988Sjilles case CTLESC: /* This means CTL* are always considered quoted. */ 319200988Sjilles case CTLVAR: 320200988Sjilles case CTLBACKQ: 321200988Sjilles case CTLBACKQ | CTLQUOTE: 322200988Sjilles case CTLARI: 323200988Sjilles case CTLENDARI: 32439137Stegge case CTLQUOTEMARK: 32539137Stegge return (startp); 3261556Srgrimes case ':': 3271556Srgrimes if (flag & EXP_VARTILDE) 3281556Srgrimes goto done; 3291556Srgrimes break; 3301556Srgrimes case '/': 331206150Sjilles case CTLENDVAR: 3321556Srgrimes goto done; 3331556Srgrimes } 3341556Srgrimes p++; 3351556Srgrimes } 3361556Srgrimesdone: 3371556Srgrimes *p = '\0'; 3381556Srgrimes if (*(startp+1) == '\0') { 3391556Srgrimes if ((home = lookupvar("HOME")) == NULL) 3401556Srgrimes goto lose; 3411556Srgrimes } else { 3421556Srgrimes if ((pw = getpwnam(startp+1)) == NULL) 3431556Srgrimes goto lose; 3441556Srgrimes home = pw->pw_dir; 3451556Srgrimes } 3461556Srgrimes if (*home == '\0') 3471556Srgrimes goto lose; 3481556Srgrimes *p = c; 349216384Sjilles if (quotes) 350216384Sjilles STPUTS_QUOTES(home, SQSYNTAX, expdest); 351216384Sjilles else 352216384Sjilles STPUTS(home, expdest); 3531556Srgrimes return (p); 3541556Srgrimeslose: 3551556Srgrimes *p = c; 3561556Srgrimes return (startp); 3571556Srgrimes} 3581556Srgrimes 3591556Srgrimes 360213811Sobrienstatic void 36190111Simpremoverecordregions(int endoff) 36238887Stegge{ 36338887Stegge if (ifslastp == NULL) 36438887Stegge return; 36538887Stegge 36638887Stegge if (ifsfirst.endoff > endoff) { 36738887Stegge while (ifsfirst.next != NULL) { 36838887Stegge struct ifsregion *ifsp; 36938887Stegge INTOFF; 37038887Stegge ifsp = ifsfirst.next->next; 37138887Stegge ckfree(ifsfirst.next); 37238887Stegge ifsfirst.next = ifsp; 37338887Stegge INTON; 37438887Stegge } 37538887Stegge if (ifsfirst.begoff > endoff) 37638887Stegge ifslastp = NULL; 37738887Stegge else { 37838887Stegge ifslastp = &ifsfirst; 37938887Stegge ifsfirst.endoff = endoff; 38038887Stegge } 38138887Stegge return; 38238887Stegge } 383155301Sschweikh 38438887Stegge ifslastp = &ifsfirst; 38538887Stegge while (ifslastp->next && ifslastp->next->begoff < endoff) 38638887Stegge ifslastp=ifslastp->next; 38738887Stegge while (ifslastp->next != NULL) { 38838887Stegge struct ifsregion *ifsp; 38938887Stegge INTOFF; 39038887Stegge ifsp = ifslastp->next->next; 39138887Stegge ckfree(ifslastp->next); 39238887Stegge ifslastp->next = ifsp; 39338887Stegge INTON; 39438887Stegge } 39538887Stegge if (ifslastp->endoff > endoff) 39638887Stegge ifslastp->endoff = endoff; 39738887Stegge} 39838887Stegge 3991556Srgrimes/* 4001556Srgrimes * Expand arithmetic expression. Backup to start of expression, 4011556Srgrimes * evaluate, place result in (backed up) result, adjust string position. 4021556Srgrimes */ 4031556Srgrimesvoid 40490111Simpexpari(int flag) 40517987Speter{ 406207206Sjilles char *p, *q, *start; 407178631Sstefanf arith_t result; 40838887Stegge int begoff; 409108935Stjr int quotes = flag & (EXP_FULL | EXP_CASE | EXP_REDIR); 41038887Stegge int quoted; 4111556Srgrimes 4121556Srgrimes /* 41346684Skris * This routine is slightly over-complicated for 4141556Srgrimes * efficiency. First we make sure there is 4151556Srgrimes * enough space for the result, which may be bigger 416212243Sjilles * than the expression. Next we 4171556Srgrimes * scan backwards looking for the start of arithmetic. If the 4181556Srgrimes * next previous character is a CTLESC character, then we 4191556Srgrimes * have to rescan starting from the beginning since CTLESC 4208855Srgrimes * characters have to be processed left to right. 4211556Srgrimes */ 422178631Sstefanf CHECKSTRSPACE(DIGITS(result) - 2, expdest); 4238855Srgrimes USTPUTC('\0', expdest); 4241556Srgrimes start = stackblock(); 42583676Stegge p = expdest - 2; 42683676Stegge while (p >= start && *p != CTLARI) 4271556Srgrimes --p; 42883676Stegge if (p < start || *p != CTLARI) 4291556Srgrimes error("missing CTLARI (shouldn't happen)"); 43083676Stegge if (p > start && *(p - 1) == CTLESC) 4311556Srgrimes for (p = start; *p != CTLARI; p++) 4321556Srgrimes if (*p == CTLESC) 4331556Srgrimes p++; 43438887Stegge 43538887Stegge if (p[1] == '"') 43638887Stegge quoted=1; 43738887Stegge else 43838887Stegge quoted=0; 43938887Stegge begoff = p - start; 44038887Stegge removerecordregions(begoff); 4411556Srgrimes if (quotes) 44238887Stegge rmescapes(p+2); 443207206Sjilles q = grabstackstr(expdest); 44438887Stegge result = arith(p+2); 445207206Sjilles ungrabstackstr(q, expdest); 446178631Sstefanf fmtstr(p, DIGITS(result), ARITH_FORMAT_STR, result); 4471556Srgrimes while (*p++) 4481556Srgrimes ; 44938887Stegge if (quoted == 0) 45038887Stegge recordregion(begoff, p - 1 - start, 0); 4511556Srgrimes result = expdest - p + 1; 4521556Srgrimes STADJUST(-result, expdest); 4531556Srgrimes} 4541556Srgrimes 4551556Srgrimes 4561556Srgrimes/* 457212243Sjilles * Perform command substitution. 4581556Srgrimes */ 459213811Sobrienstatic void 46090111Simpexpbackq(union node *cmd, int quoted, int flag) 46117987Speter{ 4621556Srgrimes struct backcmd in; 4631556Srgrimes int i; 4641556Srgrimes char buf[128]; 4651556Srgrimes char *p; 4661556Srgrimes char *dest = expdest; 4671556Srgrimes struct ifsregion saveifs, *savelastp; 4681556Srgrimes struct nodelist *saveargbackq; 4691556Srgrimes char lastc; 4701556Srgrimes int startloc = dest - stackblock(); 4711556Srgrimes char const *syntax = quoted? DQSYNTAX : BASESYNTAX; 472108935Stjr int quotes = flag & (EXP_FULL | EXP_CASE | EXP_REDIR); 473115424Sfenner int nnl; 4741556Srgrimes 4751556Srgrimes INTOFF; 4761556Srgrimes saveifs = ifsfirst; 4771556Srgrimes savelastp = ifslastp; 4781556Srgrimes saveargbackq = argbackq; 4791556Srgrimes p = grabstackstr(dest); 4801556Srgrimes evalbackcmd(cmd, &in); 4811556Srgrimes ungrabstackstr(p, dest); 4821556Srgrimes ifsfirst = saveifs; 4831556Srgrimes ifslastp = savelastp; 4841556Srgrimes argbackq = saveargbackq; 4851556Srgrimes 4861556Srgrimes p = in.buf; 4871556Srgrimes lastc = '\0'; 488115424Sfenner nnl = 0; 489115424Sfenner /* Don't copy trailing newlines */ 4901556Srgrimes for (;;) { 4911556Srgrimes if (--in.nleft < 0) { 4921556Srgrimes if (in.fd < 0) 4931556Srgrimes break; 4941556Srgrimes while ((i = read(in.fd, buf, sizeof buf)) < 0 && errno == EINTR); 4951556Srgrimes TRACE(("expbackq: read returns %d\n", i)); 4961556Srgrimes if (i <= 0) 4971556Srgrimes break; 4981556Srgrimes p = buf; 4991556Srgrimes in.nleft = i - 1; 5001556Srgrimes } 5011556Srgrimes lastc = *p++; 5021556Srgrimes if (lastc != '\0') { 503115424Sfenner if (lastc == '\n') { 504115424Sfenner nnl++; 505115424Sfenner } else { 506216706Sjilles CHECKSTRSPACE(nnl + 2, dest); 507115424Sfenner while (nnl > 0) { 508115424Sfenner nnl--; 509216706Sjilles USTPUTC('\n', dest); 510115424Sfenner } 511216496Sjilles if (quotes && syntax[(int)lastc] == CCTL) 512216706Sjilles USTPUTC(CTLESC, dest); 513216706Sjilles USTPUTC(lastc, dest); 514115424Sfenner } 5151556Srgrimes } 5161556Srgrimes } 51717987Speter 5181556Srgrimes if (in.fd >= 0) 5191556Srgrimes close(in.fd); 5201556Srgrimes if (in.buf) 5211556Srgrimes ckfree(in.buf); 5221556Srgrimes if (in.jp) 52345916Scracauer exitstatus = waitforjob(in.jp, (int *)NULL); 5241556Srgrimes if (quoted == 0) 5251556Srgrimes recordregion(startloc, dest - stackblock(), 0); 526213775Sjhb TRACE(("expbackq: size=%td: \"%.*s\"\n", 527213775Sjhb ((dest - stackblock()) - startloc), 528213775Sjhb (int)((dest - stackblock()) - startloc), 5291556Srgrimes stackblock() + startloc)); 5301556Srgrimes expdest = dest; 5311556Srgrimes INTON; 5321556Srgrimes} 5331556Srgrimes 5341556Srgrimes 5351556Srgrimes 536213811Sobrienstatic int 53790111Simpsubevalvar(char *p, char *str, int strloc, int subtype, int startloc, 538214524Sjilles int varflags, int quotes) 53917987Speter{ 54017987Speter char *startp; 54117987Speter char *loc = NULL; 54245514Stegge char *q; 54317987Speter int c = 0; 54417987Speter struct nodelist *saveargbackq = argbackq; 54520425Ssteve int amount; 54620425Ssteve 547206150Sjilles argstr(p, (subtype == VSTRIMLEFT || subtype == VSTRIMLEFTMAX || 548206147Sjilles subtype == VSTRIMRIGHT || subtype == VSTRIMRIGHTMAX ? 549206150Sjilles EXP_CASE : 0) | EXP_TILDE); 55017987Speter STACKSTRNUL(expdest); 55117987Speter argbackq = saveargbackq; 55217987Speter startp = stackblock() + startloc; 55320425Ssteve if (str == NULL) 55420425Ssteve str = stackblock() + strloc; 55517987Speter 55617987Speter switch (subtype) { 55717987Speter case VSASSIGN: 55817987Speter setvar(str, startp, 0); 55920425Ssteve amount = startp - expdest; 56020425Ssteve STADJUST(amount, expdest); 56117987Speter varflags &= ~VSNUL; 56217987Speter return 1; 56317987Speter 56417987Speter case VSQUESTION: 56517987Speter if (*p != CTLENDVAR) { 566201366Sjilles outfmt(out2, "%s\n", startp); 56717987Speter error((char *)NULL); 56817987Speter } 569112254Sru error("%.*s: parameter %snot set", (int)(p - str - 1), 57017987Speter str, (varflags & VSNUL) ? "null or " 57117987Speter : nullstr); 57217987Speter return 0; 57317987Speter 57417987Speter case VSTRIMLEFT: 57525233Ssteve for (loc = startp; loc < str; loc++) { 57617987Speter c = *loc; 57717987Speter *loc = '\0'; 578214524Sjilles if (patmatch(str, startp, quotes)) { 57917987Speter *loc = c; 58017987Speter goto recordleft; 58117987Speter } 58217987Speter *loc = c; 583214524Sjilles if (quotes && *loc == CTLESC) 58445514Stegge loc++; 58517987Speter } 58617987Speter return 0; 58717987Speter 58817987Speter case VSTRIMLEFTMAX: 58945514Stegge for (loc = str - 1; loc >= startp;) { 59017987Speter c = *loc; 59117987Speter *loc = '\0'; 592214524Sjilles if (patmatch(str, startp, quotes)) { 59317987Speter *loc = c; 59417987Speter goto recordleft; 59517987Speter } 59617987Speter *loc = c; 59745514Stegge loc--; 598214524Sjilles if (quotes && loc > startp && *(loc - 1) == CTLESC) { 59945514Stegge for (q = startp; q < loc; q++) 60045514Stegge if (*q == CTLESC) 60145514Stegge q++; 60245514Stegge if (q > loc) 60345514Stegge loc--; 60445514Stegge } 60517987Speter } 60617987Speter return 0; 60717987Speter 60817987Speter case VSTRIMRIGHT: 60945514Stegge for (loc = str - 1; loc >= startp;) { 610214524Sjilles if (patmatch(str, loc, quotes)) { 61120425Ssteve amount = loc - expdest; 61220425Ssteve STADJUST(amount, expdest); 61317987Speter return 1; 61417987Speter } 61545514Stegge loc--; 616214524Sjilles if (quotes && loc > startp && *(loc - 1) == CTLESC) { 61745514Stegge for (q = startp; q < loc; q++) 61845514Stegge if (*q == CTLESC) 61945514Stegge q++; 62045514Stegge if (q > loc) 62145514Stegge loc--; 62245514Stegge } 62317987Speter } 62417987Speter return 0; 62517987Speter 62617987Speter case VSTRIMRIGHTMAX: 62717987Speter for (loc = startp; loc < str - 1; loc++) { 628214524Sjilles if (patmatch(str, loc, quotes)) { 62920425Ssteve amount = loc - expdest; 63020425Ssteve STADJUST(amount, expdest); 63117987Speter return 1; 63217987Speter } 633214524Sjilles if (quotes && *loc == CTLESC) 63445514Stegge loc++; 63517987Speter } 63617987Speter return 0; 63717987Speter 63817987Speter 63917987Speter default: 64017987Speter abort(); 64117987Speter } 64217987Speter 64317987Speterrecordleft: 64420425Ssteve amount = ((str - 1) - (loc - startp)) - expdest; 64520425Ssteve STADJUST(amount, expdest); 64617987Speter while (loc != str - 1) 64717987Speter *startp++ = *loc++; 64817987Speter return 1; 64917987Speter} 65017987Speter 65117987Speter 6521556Srgrimes/* 6531556Srgrimes * Expand a variable, and return a pointer to the next character in the 6541556Srgrimes * input string. 6551556Srgrimes */ 6561556Srgrimes 657213811Sobrienstatic char * 65890111Simpevalvar(char *p, int flag) 65917987Speter{ 6601556Srgrimes int subtype; 6611556Srgrimes int varflags; 6621556Srgrimes char *var; 6631556Srgrimes char *val; 66445644Stegge int patloc; 6651556Srgrimes int c; 6661556Srgrimes int set; 6671556Srgrimes int special; 6681556Srgrimes int startloc; 66917987Speter int varlen; 670221602Sjilles int varlenb; 67117987Speter int easy; 672108935Stjr int quotes = flag & (EXP_FULL | EXP_CASE | EXP_REDIR); 6731556Srgrimes 674164081Sstefanf varflags = (unsigned char)*p++; 6751556Srgrimes subtype = varflags & VSTYPE; 6761556Srgrimes var = p; 6771556Srgrimes special = 0; 6781556Srgrimes if (! is_name(*p)) 6791556Srgrimes special = 1; 6801556Srgrimes p = strchr(p, '=') + 1; 6811556Srgrimesagain: /* jump here after setting a variable with ${var=text} */ 682179022Sstefanf if (varflags & VSLINENO) { 683179022Sstefanf set = 1; 684179022Sstefanf special = 0; 685179022Sstefanf val = var; 686179022Sstefanf p[-1] = '\0'; /* temporarily overwrite '=' to have \0 687179022Sstefanf terminated string */ 688179022Sstefanf } else if (special) { 68925233Ssteve set = varisset(var, varflags & VSNUL); 6901556Srgrimes val = NULL; 6911556Srgrimes } else { 69260592Scracauer val = bltinlookup(var, 1); 69317987Speter if (val == NULL || ((varflags & VSNUL) && val[0] == '\0')) { 6941556Srgrimes val = NULL; 6951556Srgrimes set = 0; 6961556Srgrimes } else 6971556Srgrimes set = 1; 6981556Srgrimes } 69917987Speter varlen = 0; 7001556Srgrimes startloc = expdest - stackblock(); 701198454Sjilles if (!set && uflag && *var != '@' && *var != '*') { 70296939Stjr switch (subtype) { 70396939Stjr case VSNORMAL: 70496939Stjr case VSTRIMLEFT: 70596939Stjr case VSTRIMLEFTMAX: 70696939Stjr case VSTRIMRIGHT: 70796939Stjr case VSTRIMRIGHTMAX: 70896939Stjr case VSLENGTH: 709112254Sru error("%.*s: parameter not set", (int)(p - var - 1), 710112254Sru var); 71196939Stjr } 71296939Stjr } 7131556Srgrimes if (set && subtype != VSPLUS) { 7141556Srgrimes /* insert the value of the variable */ 7151556Srgrimes if (special) { 716164081Sstefanf varvalue(var, varflags & VSQUOTE, subtype, flag); 71717987Speter if (subtype == VSLENGTH) { 718221602Sjilles varlenb = expdest - stackblock() - startloc; 719221602Sjilles varlen = varlenb; 720221602Sjilles if (localeisutf8) { 721221602Sjilles val = stackblock() + startloc; 722221602Sjilles for (;val != expdest; val++) 723221602Sjilles if ((*val & 0xC0) == 0x80) 724221602Sjilles varlen--; 725221602Sjilles } 726221602Sjilles STADJUST(-varlenb, expdest); 72717987Speter } 7281556Srgrimes } else { 72920425Ssteve char const *syntax = (varflags & VSQUOTE) ? DQSYNTAX 73017987Speter : BASESYNTAX; 7311556Srgrimes 73217987Speter if (subtype == VSLENGTH) { 73317987Speter for (;*val; val++) 734221602Sjilles if (!localeisutf8 || 735221602Sjilles (*val & 0xC0) != 0x80) 736221602Sjilles varlen++; 7371556Srgrimes } 73817987Speter else { 739216384Sjilles if (quotes) 740216384Sjilles STPUTS_QUOTES(val, syntax, expdest); 741216384Sjilles else 742216384Sjilles STPUTS(val, expdest); 74317987Speter 74417987Speter } 7451556Srgrimes } 7461556Srgrimes } 74720425Ssteve 7481556Srgrimes if (subtype == VSPLUS) 7491556Srgrimes set = ! set; 75017987Speter 75120425Ssteve easy = ((varflags & VSQUOTE) == 0 || 75217987Speter (*var == '@' && shellparam.nparam != 1)); 75317987Speter 75417987Speter 75517987Speter switch (subtype) { 75617987Speter case VSLENGTH: 75717987Speter expdest = cvtnum(varlen, expdest); 75817987Speter goto record; 75917987Speter 76017987Speter case VSNORMAL: 76117987Speter if (!easy) 76217987Speter break; 76317987Speterrecord: 76420425Ssteve recordregion(startloc, expdest - stackblock(), 765222361Sjilles varflags & VSQUOTE || (ifsset() && ifsval()[0] == '\0' && 766222361Sjilles (*var == '@' || *var == '*'))); 76717987Speter break; 76817987Speter 76917987Speter case VSPLUS: 77017987Speter case VSMINUS: 77117987Speter if (!set) { 772214512Sjilles argstr(p, flag | (flag & EXP_FULL ? EXP_SPLIT_LIT : 0) | 773214512Sjilles (varflags & VSQUOTE ? EXP_LIT_QUOTED : 0)); 77417987Speter break; 77517987Speter } 77617987Speter if (easy) 77717987Speter goto record; 77817987Speter break; 77917987Speter 78017987Speter case VSTRIMLEFT: 78117987Speter case VSTRIMLEFTMAX: 78217987Speter case VSTRIMRIGHT: 78317987Speter case VSTRIMRIGHTMAX: 78417987Speter if (!set) 78517987Speter break; 78617987Speter /* 78717987Speter * Terminate the string and start recording the pattern 78817987Speter * right after it 78917987Speter */ 79017987Speter STPUTC('\0', expdest); 79145644Stegge patloc = expdest - stackblock(); 79245644Stegge if (subevalvar(p, NULL, patloc, subtype, 793214524Sjilles startloc, varflags, quotes) == 0) { 79445644Stegge int amount = (expdest - stackblock() - patloc) + 1; 79525233Ssteve STADJUST(-amount, expdest); 79625233Ssteve } 79738887Stegge /* Remove any recorded regions beyond start of variable */ 79838887Stegge removerecordregions(startloc); 79938887Stegge goto record; 80017987Speter 80117987Speter case VSASSIGN: 80217987Speter case VSQUESTION: 80317987Speter if (!set) { 804214524Sjilles if (subevalvar(p, var, 0, subtype, startloc, varflags, 805214524Sjilles quotes)) { 80620425Ssteve varflags &= ~VSNUL; 807155301Sschweikh /* 808155301Sschweikh * Remove any recorded regions beyond 809155301Sschweikh * start of variable 81038887Stegge */ 81138887Stegge removerecordregions(startloc); 8121556Srgrimes goto again; 81320425Ssteve } 81417987Speter break; 8151556Srgrimes } 81617987Speter if (easy) 81717987Speter goto record; 81817987Speter break; 81917987Speter 820164003Sstefanf case VSERROR: 821164003Sstefanf c = p - var - 1; 822164003Sstefanf error("${%.*s%s}: Bad substitution", c, var, 823164003Sstefanf (c > 0 && *p != CTLENDVAR) ? "..." : ""); 824164003Sstefanf 82517987Speter default: 82617987Speter abort(); 8271556Srgrimes } 828179022Sstefanf p[-1] = '='; /* recover overwritten '=' */ 82917987Speter 8301556Srgrimes if (subtype != VSNORMAL) { /* skip to end of alternative */ 8311556Srgrimes int nesting = 1; 8321556Srgrimes for (;;) { 8331556Srgrimes if ((c = *p++) == CTLESC) 8341556Srgrimes p++; 8351556Srgrimes else if (c == CTLBACKQ || c == (CTLBACKQ|CTLQUOTE)) { 8361556Srgrimes if (set) 8371556Srgrimes argbackq = argbackq->next; 8381556Srgrimes } else if (c == CTLVAR) { 8391556Srgrimes if ((*p++ & VSTYPE) != VSNORMAL) 8401556Srgrimes nesting++; 8411556Srgrimes } else if (c == CTLENDVAR) { 8421556Srgrimes if (--nesting == 0) 8431556Srgrimes break; 8441556Srgrimes } 8451556Srgrimes } 8461556Srgrimes } 8471556Srgrimes return p; 8481556Srgrimes} 8491556Srgrimes 8501556Srgrimes 8511556Srgrimes 8521556Srgrimes/* 8531556Srgrimes * Test whether a specialized variable is set. 8541556Srgrimes */ 8551556Srgrimes 856213811Sobrienstatic int 85790111Simpvarisset(char *name, int nulok) 85825233Ssteve{ 8591556Srgrimes 86025233Ssteve if (*name == '!') 861209600Sjilles return backgndpidset(); 86225233Ssteve else if (*name == '@' || *name == '*') { 8631556Srgrimes if (*shellparam.p == NULL) 8641556Srgrimes return 0; 86525233Ssteve 86625233Ssteve if (nulok) { 86725233Ssteve char **av; 86825233Ssteve 86925233Ssteve for (av = shellparam.p; *av; av++) 87025233Ssteve if (**av != '\0') 87125233Ssteve return 1; 87225233Ssteve return 0; 87325233Ssteve } 87418202Speter } else if (is_digit(*name)) { 87525233Ssteve char *ap; 87620425Ssteve int num = atoi(name); 87725233Ssteve 87825233Ssteve if (num > shellparam.nparam) 87925233Ssteve return 0; 88025233Ssteve 88125233Ssteve if (num == 0) 88225233Ssteve ap = arg0; 88325233Ssteve else 88425233Ssteve ap = shellparam.p[num - 1]; 88525233Ssteve 88625233Ssteve if (nulok && (ap == NULL || *ap == '\0')) 88725233Ssteve return 0; 8881556Srgrimes } 8891556Srgrimes return 1; 8901556Srgrimes} 8911556Srgrimes 892216384Sjillesstatic void 893216384Sjillesstrtodest(const char *p, int flag, int subtype, int quoted) 894216384Sjilles{ 895216384Sjilles if (flag & (EXP_FULL | EXP_CASE) && subtype != VSLENGTH) 896216384Sjilles STPUTS_QUOTES(p, quoted ? DQSYNTAX : BASESYNTAX, expdest); 897216384Sjilles else 898216384Sjilles STPUTS(p, expdest); 899216384Sjilles} 9001556Srgrimes 9011556Srgrimes/* 9021556Srgrimes * Add the value of a specialized variable to the stack string. 9031556Srgrimes */ 9041556Srgrimes 905213811Sobrienstatic void 906164081Sstefanfvarvalue(char *name, int quoted, int subtype, int flag) 90717987Speter{ 9081556Srgrimes int num; 9091556Srgrimes char *p; 9101556Srgrimes int i; 9111556Srgrimes char sep; 9121556Srgrimes char **ap; 9131556Srgrimes 91418202Speter switch (*name) { 9151556Srgrimes case '$': 9161556Srgrimes num = rootpid; 9171556Srgrimes goto numvar; 9181556Srgrimes case '?': 91917987Speter num = oexitstatus; 9201556Srgrimes goto numvar; 9211556Srgrimes case '#': 9221556Srgrimes num = shellparam.nparam; 9231556Srgrimes goto numvar; 9241556Srgrimes case '!': 925209600Sjilles num = backgndpidval(); 9261556Srgrimesnumvar: 92717987Speter expdest = cvtnum(num, expdest); 9281556Srgrimes break; 9291556Srgrimes case '-': 9301556Srgrimes for (i = 0 ; i < NOPTS ; i++) { 9311556Srgrimes if (optlist[i].val) 9321556Srgrimes STPUTC(optlist[i].letter, expdest); 9331556Srgrimes } 9341556Srgrimes break; 9351556Srgrimes case '@': 936164081Sstefanf if (flag & EXP_FULL && quoted) { 93738887Stegge for (ap = shellparam.p ; (p = *ap++) != NULL ; ) { 938216384Sjilles strtodest(p, flag, subtype, quoted); 93938887Stegge if (*ap) 94038887Stegge STPUTC('\0', expdest); 94138887Stegge } 94238887Stegge break; 9431556Srgrimes } 944102410Scharnier /* FALLTHROUGH */ 9451556Srgrimes case '*': 946149825Srse if (ifsset()) 94738887Stegge sep = ifsval()[0]; 94838887Stegge else 94938887Stegge sep = ' '; 9501556Srgrimes for (ap = shellparam.p ; (p = *ap++) != NULL ; ) { 951216384Sjilles strtodest(p, flag, subtype, quoted); 952222361Sjilles if (!*ap) 953222361Sjilles break; 954222361Sjilles if (sep || (flag & EXP_FULL && !quoted && **ap != '\0')) 9551556Srgrimes STPUTC(sep, expdest); 9561556Srgrimes } 9571556Srgrimes break; 9581556Srgrimes case '0': 9591556Srgrimes p = arg0; 960216384Sjilles strtodest(p, flag, subtype, quoted); 9611556Srgrimes break; 9621556Srgrimes default: 96318202Speter if (is_digit(*name)) { 96418202Speter num = atoi(name); 96518202Speter if (num > 0 && num <= shellparam.nparam) { 96618202Speter p = shellparam.p[num - 1]; 967216384Sjilles strtodest(p, flag, subtype, quoted); 96818202Speter } 9691556Srgrimes } 9701556Srgrimes break; 9711556Srgrimes } 9721556Srgrimes} 9731556Srgrimes 9741556Srgrimes 9751556Srgrimes 9761556Srgrimes/* 977218909Sbrucec * Record the fact that we have to scan this region of the 9781556Srgrimes * string for IFS characters. 9791556Srgrimes */ 9801556Srgrimes 981213811Sobrienstatic void 982194975Sjillesrecordregion(int start, int end, int inquotes) 98317987Speter{ 98425233Ssteve struct ifsregion *ifsp; 9851556Srgrimes 9861556Srgrimes if (ifslastp == NULL) { 9871556Srgrimes ifsp = &ifsfirst; 9881556Srgrimes } else { 989194975Sjilles if (ifslastp->endoff == start 990194975Sjilles && ifslastp->inquotes == inquotes) { 991194975Sjilles /* extend previous area */ 992194975Sjilles ifslastp->endoff = end; 993194975Sjilles return; 994194975Sjilles } 9951556Srgrimes ifsp = (struct ifsregion *)ckmalloc(sizeof (struct ifsregion)); 9961556Srgrimes ifslastp->next = ifsp; 9971556Srgrimes } 9981556Srgrimes ifslastp = ifsp; 9991556Srgrimes ifslastp->next = NULL; 10001556Srgrimes ifslastp->begoff = start; 10011556Srgrimes ifslastp->endoff = end; 1002194975Sjilles ifslastp->inquotes = inquotes; 10031556Srgrimes} 10041556Srgrimes 10051556Srgrimes 10061556Srgrimes 10071556Srgrimes/* 10081556Srgrimes * Break the argument string into pieces based upon IFS and add the 10091556Srgrimes * strings to the argument list. The regions of the string to be 10101556Srgrimes * searched for IFS characters have been stored by recordregion. 1011212243Sjilles * CTLESC characters are preserved but have little effect in this pass 1012212243Sjilles * other than escaping CTL* characters. In particular, they do not escape 1013212243Sjilles * IFS characters: that should be done with the ifsregion mechanism. 1014212243Sjilles * CTLQUOTEMARK characters are used to preserve empty quoted strings. 1015212243Sjilles * This pass treats them as a regular character, making the string non-empty. 1016212243Sjilles * Later, they are removed along with the other CTL* characters. 10171556Srgrimes */ 1018213811Sobrienstatic void 101990111Simpifsbreakup(char *string, struct arglist *arglist) 102090111Simp{ 10211556Srgrimes struct ifsregion *ifsp; 10221556Srgrimes struct strlist *sp; 10231556Srgrimes char *start; 102425233Ssteve char *p; 10251556Srgrimes char *q; 1026201053Sjilles const char *ifs; 1027194975Sjilles const char *ifsspc; 1028194975Sjilles int had_param_ch = 0; 10291556Srgrimes 1030194975Sjilles start = string; 103117987Speter 1032194975Sjilles if (ifslastp == NULL) { 1033194975Sjilles /* Return entire argument, IFS doesn't apply to any of it */ 1034194975Sjilles sp = (struct strlist *)stalloc(sizeof *sp); 1035194975Sjilles sp->text = start; 1036194975Sjilles *arglist->lastp = sp; 1037194975Sjilles arglist->lastp = &sp->next; 1038194975Sjilles return; 1039194975Sjilles } 1040194975Sjilles 1041194975Sjilles ifs = ifsset() ? ifsval() : " \t\n"; 1042194975Sjilles 1043194975Sjilles for (ifsp = &ifsfirst; ifsp != NULL; ifsp = ifsp->next) { 1044194975Sjilles p = string + ifsp->begoff; 1045194975Sjilles while (p < string + ifsp->endoff) { 1046194975Sjilles q = p; 1047194975Sjilles if (*p == CTLESC) 1048194975Sjilles p++; 1049194975Sjilles if (ifsp->inquotes) { 1050194975Sjilles /* Only NULs (should be from "$@") end args */ 1051194977Sjilles had_param_ch = 1; 1052194975Sjilles if (*p != 0) { 10531556Srgrimes p++; 1054194975Sjilles continue; 1055194975Sjilles } 1056194975Sjilles ifsspc = NULL; 1057194975Sjilles } else { 1058194975Sjilles if (!strchr(ifs, *p)) { 1059194977Sjilles had_param_ch = 1; 106038887Stegge p++; 1061194975Sjilles continue; 1062194975Sjilles } 1063194975Sjilles ifsspc = strchr(" \t\n", *p); 1064194975Sjilles 1065194975Sjilles /* Ignore IFS whitespace at start */ 1066194975Sjilles if (q == start && ifsspc != NULL) { 1067194975Sjilles p++; 10681556Srgrimes start = p; 1069194975Sjilles continue; 1070194975Sjilles } 1071194977Sjilles had_param_ch = 0; 10721556Srgrimes } 1073194975Sjilles 1074194975Sjilles /* Save this argument... */ 1075194975Sjilles *q = '\0'; 10761556Srgrimes sp = (struct strlist *)stalloc(sizeof *sp); 10771556Srgrimes sp->text = start; 10781556Srgrimes *arglist->lastp = sp; 10791556Srgrimes arglist->lastp = &sp->next; 1080194975Sjilles p++; 1081194975Sjilles 1082194975Sjilles if (ifsspc != NULL) { 1083194975Sjilles /* Ignore further trailing IFS whitespace */ 1084194975Sjilles for (; p < string + ifsp->endoff; p++) { 1085194975Sjilles q = p; 1086194975Sjilles if (*p == CTLESC) 1087194975Sjilles p++; 1088194975Sjilles if (strchr(ifs, *p) == NULL) { 1089194975Sjilles p = q; 1090194975Sjilles break; 1091194975Sjilles } 1092194975Sjilles if (strchr(" \t\n", *p) == NULL) { 1093194975Sjilles p++; 1094194975Sjilles break; 1095194975Sjilles } 1096194975Sjilles } 1097194975Sjilles } 1098194975Sjilles start = p; 10991556Srgrimes } 1100194975Sjilles } 1101194975Sjilles 1102194975Sjilles /* 1103194975Sjilles * Save anything left as an argument. 1104194975Sjilles * Traditionally we have treated 'IFS=':'; set -- x$IFS' as 1105194975Sjilles * generating 2 arguments, the second of which is empty. 1106194975Sjilles * Some recent clarification of the Posix spec say that it 1107194975Sjilles * should only generate one.... 1108194975Sjilles */ 1109194975Sjilles if (had_param_ch || *start != 0) { 11101556Srgrimes sp = (struct strlist *)stalloc(sizeof *sp); 11111556Srgrimes sp->text = start; 11121556Srgrimes *arglist->lastp = sp; 11131556Srgrimes arglist->lastp = &sp->next; 11141556Srgrimes } 11151556Srgrimes} 11161556Srgrimes 11171556Srgrimes 1118213760Sobrienstatic char expdir[PATH_MAX]; 1119212243Sjilles#define expdir_end (expdir + sizeof(expdir)) 11201556Srgrimes 11211556Srgrimes/* 1122212243Sjilles * Perform pathname generation and remove control characters. 1123212243Sjilles * At this point, the only control characters should be CTLESC and CTLQUOTEMARK. 1124212243Sjilles * The results are stored in the list exparg. 11251556Srgrimes */ 1126213811Sobrienstatic void 112790111Simpexpandmeta(struct strlist *str, int flag __unused) 112817987Speter{ 11291556Srgrimes char *p; 11301556Srgrimes struct strlist **savelastp; 11311556Srgrimes struct strlist *sp; 11321556Srgrimes char c; 11331556Srgrimes /* TODO - EXP_REDIR */ 11341556Srgrimes 11351556Srgrimes while (str) { 11361556Srgrimes if (fflag) 11371556Srgrimes goto nometa; 11381556Srgrimes p = str->text; 11391556Srgrimes for (;;) { /* fast check for meta chars */ 11401556Srgrimes if ((c = *p++) == '\0') 11411556Srgrimes goto nometa; 1142211646Sjilles if (c == '*' || c == '?' || c == '[') 11431556Srgrimes break; 11441556Srgrimes } 11451556Srgrimes savelastp = exparg.lastp; 11461556Srgrimes INTOFF; 11471556Srgrimes expmeta(expdir, str->text); 11481556Srgrimes INTON; 11491556Srgrimes if (exparg.lastp == savelastp) { 11508855Srgrimes /* 11518855Srgrimes * no matches 11521556Srgrimes */ 11531556Srgrimesnometa: 11541556Srgrimes *exparg.lastp = str; 11551556Srgrimes rmescapes(str->text); 11561556Srgrimes exparg.lastp = &str->next; 11571556Srgrimes } else { 11581556Srgrimes *exparg.lastp = NULL; 11591556Srgrimes *savelastp = sp = expsort(*savelastp); 11601556Srgrimes while (sp->next != NULL) 11611556Srgrimes sp = sp->next; 11621556Srgrimes exparg.lastp = &sp->next; 11631556Srgrimes } 11641556Srgrimes str = str->next; 11651556Srgrimes } 11661556Srgrimes} 11671556Srgrimes 11681556Srgrimes 11691556Srgrimes/* 11701556Srgrimes * Do metacharacter (i.e. *, ?, [...]) expansion. 11711556Srgrimes */ 11721556Srgrimes 1173213811Sobrienstatic void 117490111Simpexpmeta(char *enddir, char *name) 117590111Simp{ 117625233Ssteve char *p; 11771556Srgrimes char *q; 11781556Srgrimes char *start; 11791556Srgrimes char *endname; 11801556Srgrimes int metaflag; 11811556Srgrimes struct stat statb; 11821556Srgrimes DIR *dirp; 11831556Srgrimes struct dirent *dp; 11841556Srgrimes int atend; 11851556Srgrimes int matchdot; 1186207944Sjilles int esc; 11871556Srgrimes 11881556Srgrimes metaflag = 0; 11891556Srgrimes start = name; 1190207944Sjilles for (p = name; esc = 0, *p; p += esc + 1) { 11911556Srgrimes if (*p == '*' || *p == '?') 11921556Srgrimes metaflag = 1; 11931556Srgrimes else if (*p == '[') { 11941556Srgrimes q = p + 1; 119526488Sache if (*q == '!' || *q == '^') 11961556Srgrimes q++; 11971556Srgrimes for (;;) { 119838887Stegge while (*q == CTLQUOTEMARK) 119938887Stegge q++; 12001556Srgrimes if (*q == CTLESC) 12011556Srgrimes q++; 12021556Srgrimes if (*q == '/' || *q == '\0') 12031556Srgrimes break; 12041556Srgrimes if (*++q == ']') { 12051556Srgrimes metaflag = 1; 12061556Srgrimes break; 12071556Srgrimes } 12081556Srgrimes } 12091556Srgrimes } else if (*p == '\0') 12101556Srgrimes break; 121138887Stegge else if (*p == CTLQUOTEMARK) 121238887Stegge continue; 1213207944Sjilles else { 1214207944Sjilles if (*p == CTLESC) 1215207944Sjilles esc++; 1216207944Sjilles if (p[esc] == '/') { 1217207944Sjilles if (metaflag) 1218207944Sjilles break; 1219207944Sjilles start = p + esc + 1; 1220207944Sjilles } 12211556Srgrimes } 12221556Srgrimes } 12231556Srgrimes if (metaflag == 0) { /* we've reached the end of the file name */ 12241556Srgrimes if (enddir != expdir) 12251556Srgrimes metaflag++; 12261556Srgrimes for (p = name ; ; p++) { 122738887Stegge if (*p == CTLQUOTEMARK) 122838887Stegge continue; 12291556Srgrimes if (*p == CTLESC) 12301556Srgrimes p++; 12311556Srgrimes *enddir++ = *p; 12321556Srgrimes if (*p == '\0') 12331556Srgrimes break; 1234211155Sjilles if (enddir == expdir_end) 1235211155Sjilles return; 12361556Srgrimes } 1237147812Sdelphij if (metaflag == 0 || lstat(expdir, &statb) >= 0) 12381556Srgrimes addfname(expdir); 12391556Srgrimes return; 12401556Srgrimes } 12411556Srgrimes endname = p; 12421556Srgrimes if (start != name) { 12431556Srgrimes p = name; 12441556Srgrimes while (p < start) { 124538887Stegge while (*p == CTLQUOTEMARK) 124638887Stegge p++; 12471556Srgrimes if (*p == CTLESC) 12481556Srgrimes p++; 12491556Srgrimes *enddir++ = *p++; 1250211155Sjilles if (enddir == expdir_end) 1251211155Sjilles return; 12521556Srgrimes } 12531556Srgrimes } 12541556Srgrimes if (enddir == expdir) { 12551556Srgrimes p = "."; 12561556Srgrimes } else if (enddir == expdir + 1 && *expdir == '/') { 12571556Srgrimes p = "/"; 12581556Srgrimes } else { 12591556Srgrimes p = expdir; 12601556Srgrimes enddir[-1] = '\0'; 12611556Srgrimes } 12621556Srgrimes if ((dirp = opendir(p)) == NULL) 12631556Srgrimes return; 12641556Srgrimes if (enddir != expdir) 12651556Srgrimes enddir[-1] = '/'; 12661556Srgrimes if (*endname == 0) { 12671556Srgrimes atend = 1; 12681556Srgrimes } else { 12691556Srgrimes atend = 0; 1270207944Sjilles *endname = '\0'; 1271207944Sjilles endname += esc + 1; 12721556Srgrimes } 12731556Srgrimes matchdot = 0; 127438887Stegge p = start; 127538887Stegge while (*p == CTLQUOTEMARK) 127638887Stegge p++; 127738887Stegge if (*p == CTLESC) 127838887Stegge p++; 127938887Stegge if (*p == '.') 12801556Srgrimes matchdot++; 12811556Srgrimes while (! int_pending() && (dp = readdir(dirp)) != NULL) { 12821556Srgrimes if (dp->d_name[0] == '.' && ! matchdot) 12831556Srgrimes continue; 128445514Stegge if (patmatch(start, dp->d_name, 0)) { 1285211155Sjilles if (enddir + dp->d_namlen + 1 > expdir_end) 1286211155Sjilles continue; 1287211155Sjilles memcpy(enddir, dp->d_name, dp->d_namlen + 1); 1288211155Sjilles if (atend) 12891556Srgrimes addfname(expdir); 1290211155Sjilles else { 1291211155Sjilles if (enddir + dp->d_namlen + 2 > expdir_end) 129217987Speter continue; 1293211155Sjilles enddir[dp->d_namlen] = '/'; 1294211155Sjilles enddir[dp->d_namlen + 1] = '\0'; 1295211155Sjilles expmeta(enddir + dp->d_namlen + 1, endname); 12961556Srgrimes } 12971556Srgrimes } 12981556Srgrimes } 12991556Srgrimes closedir(dirp); 13001556Srgrimes if (! atend) 1301207944Sjilles endname[-esc - 1] = esc ? CTLESC : '/'; 13021556Srgrimes} 13031556Srgrimes 13041556Srgrimes 13051556Srgrimes/* 13061556Srgrimes * Add a file name to the list. 13071556Srgrimes */ 13081556Srgrimes 1309213811Sobrienstatic void 131090111Simpaddfname(char *name) 131190111Simp{ 13121556Srgrimes char *p; 13131556Srgrimes struct strlist *sp; 13141556Srgrimes 13151556Srgrimes p = stalloc(strlen(name) + 1); 13161556Srgrimes scopy(name, p); 13171556Srgrimes sp = (struct strlist *)stalloc(sizeof *sp); 13181556Srgrimes sp->text = p; 13191556Srgrimes *exparg.lastp = sp; 13201556Srgrimes exparg.lastp = &sp->next; 13211556Srgrimes} 13221556Srgrimes 13231556Srgrimes 13241556Srgrimes/* 13251556Srgrimes * Sort the results of file name expansion. It calculates the number of 13261556Srgrimes * strings to sort and then calls msort (short for merge sort) to do the 13271556Srgrimes * work. 13281556Srgrimes */ 13291556Srgrimes 1330213811Sobrienstatic struct strlist * 133190111Simpexpsort(struct strlist *str) 133290111Simp{ 13331556Srgrimes int len; 13341556Srgrimes struct strlist *sp; 13351556Srgrimes 13361556Srgrimes len = 0; 13371556Srgrimes for (sp = str ; sp ; sp = sp->next) 13381556Srgrimes len++; 13391556Srgrimes return msort(str, len); 13401556Srgrimes} 13411556Srgrimes 13421556Srgrimes 1343213811Sobrienstatic struct strlist * 134490111Simpmsort(struct strlist *list, int len) 134517987Speter{ 134617987Speter struct strlist *p, *q = NULL; 13471556Srgrimes struct strlist **lpp; 13481556Srgrimes int half; 13491556Srgrimes int n; 13501556Srgrimes 13511556Srgrimes if (len <= 1) 13521556Srgrimes return list; 13538855Srgrimes half = len >> 1; 13541556Srgrimes p = list; 13551556Srgrimes for (n = half ; --n >= 0 ; ) { 13561556Srgrimes q = p; 13571556Srgrimes p = p->next; 13581556Srgrimes } 13591556Srgrimes q->next = NULL; /* terminate first half of list */ 13601556Srgrimes q = msort(list, half); /* sort first half of list */ 13611556Srgrimes p = msort(p, len - half); /* sort second half */ 13621556Srgrimes lpp = &list; 13631556Srgrimes for (;;) { 13641556Srgrimes if (strcmp(p->text, q->text) < 0) { 13651556Srgrimes *lpp = p; 13661556Srgrimes lpp = &p->next; 13671556Srgrimes if ((p = *lpp) == NULL) { 13681556Srgrimes *lpp = q; 13691556Srgrimes break; 13701556Srgrimes } 13711556Srgrimes } else { 13721556Srgrimes *lpp = q; 13731556Srgrimes lpp = &q->next; 13741556Srgrimes if ((q = *lpp) == NULL) { 13751556Srgrimes *lpp = p; 13761556Srgrimes break; 13771556Srgrimes } 13781556Srgrimes } 13791556Srgrimes } 13801556Srgrimes return list; 13811556Srgrimes} 13821556Srgrimes 13831556Srgrimes 13841556Srgrimes 1385221646Sjillesstatic wchar_t 1386221646Sjillesget_wc(const char **p) 1387221646Sjilles{ 1388221646Sjilles wchar_t c; 1389221646Sjilles int chrlen; 1390221646Sjilles 1391221646Sjilles chrlen = mbtowc(&c, *p, 4); 1392221646Sjilles if (chrlen == 0) 1393221646Sjilles return 0; 1394221646Sjilles else if (chrlen == -1) 1395221646Sjilles c = 0; 1396221646Sjilles else 1397221646Sjilles *p += chrlen; 1398221646Sjilles return c; 1399221646Sjilles} 1400221646Sjilles 1401221646Sjilles 14021556Srgrimes/* 14031556Srgrimes * Returns true if the pattern matches the string. 14041556Srgrimes */ 14051556Srgrimes 14061556Srgrimesint 1407200956Sjillespatmatch(const char *pattern, const char *string, int squoted) 140890111Simp{ 1409200956Sjilles const char *p, *q; 141025233Ssteve char c; 1411221646Sjilles wchar_t wc, wc2; 14121556Srgrimes 14131556Srgrimes p = pattern; 14141556Srgrimes q = string; 14151556Srgrimes for (;;) { 14161556Srgrimes switch (c = *p++) { 14171556Srgrimes case '\0': 14181556Srgrimes goto breakloop; 14191556Srgrimes case CTLESC: 142045514Stegge if (squoted && *q == CTLESC) 142145514Stegge q++; 14221556Srgrimes if (*q++ != *p++) 14231556Srgrimes return 0; 14241556Srgrimes break; 142538887Stegge case CTLQUOTEMARK: 142638887Stegge continue; 14271556Srgrimes case '?': 142845514Stegge if (squoted && *q == CTLESC) 142945514Stegge q++; 1430221646Sjilles if (localeisutf8) 1431221646Sjilles wc = get_wc(&q); 1432221646Sjilles else 1433223010Sjilles wc = (unsigned char)*q++; 1434221646Sjilles if (wc == '\0') 14351556Srgrimes return 0; 14361556Srgrimes break; 14371556Srgrimes case '*': 14381556Srgrimes c = *p; 143938887Stegge while (c == CTLQUOTEMARK || c == '*') 144038887Stegge c = *++p; 144138887Stegge if (c != CTLESC && c != CTLQUOTEMARK && 144238887Stegge c != '?' && c != '*' && c != '[') { 14431556Srgrimes while (*q != c) { 144445514Stegge if (squoted && *q == CTLESC && 144545514Stegge q[1] == c) 144645514Stegge break; 14471556Srgrimes if (*q == '\0') 14481556Srgrimes return 0; 144945514Stegge if (squoted && *q == CTLESC) 145045514Stegge q++; 14511556Srgrimes q++; 14521556Srgrimes } 14531556Srgrimes } 14541556Srgrimes do { 1455211646Sjilles if (patmatch(p, q, squoted)) 14561556Srgrimes return 1; 145745514Stegge if (squoted && *q == CTLESC) 145845514Stegge q++; 14591556Srgrimes } while (*q++ != '\0'); 14601556Srgrimes return 0; 14611556Srgrimes case '[': { 1462200956Sjilles const char *endp; 14631556Srgrimes int invert, found; 1464221646Sjilles wchar_t chr; 14651556Srgrimes 14661556Srgrimes endp = p; 146726488Sache if (*endp == '!' || *endp == '^') 14681556Srgrimes endp++; 14691556Srgrimes for (;;) { 147038887Stegge while (*endp == CTLQUOTEMARK) 147138887Stegge endp++; 14721556Srgrimes if (*endp == '\0') 14731556Srgrimes goto dft; /* no matching ] */ 14741556Srgrimes if (*endp == CTLESC) 14751556Srgrimes endp++; 14761556Srgrimes if (*++endp == ']') 14771556Srgrimes break; 14781556Srgrimes } 14791556Srgrimes invert = 0; 148026488Sache if (*p == '!' || *p == '^') { 14811556Srgrimes invert++; 14821556Srgrimes p++; 14831556Srgrimes } 14841556Srgrimes found = 0; 1485221646Sjilles if (squoted && *q == CTLESC) 1486221646Sjilles q++; 1487221646Sjilles if (localeisutf8) 1488221646Sjilles chr = get_wc(&q); 1489221646Sjilles else 1490223010Sjilles chr = (unsigned char)*q++; 149117987Speter if (chr == '\0') 149217987Speter return 0; 14931556Srgrimes c = *p++; 14941556Srgrimes do { 149538887Stegge if (c == CTLQUOTEMARK) 149638887Stegge continue; 14971556Srgrimes if (c == CTLESC) 14981556Srgrimes c = *p++; 1499221646Sjilles if (localeisutf8 && c & 0x80) { 1500221646Sjilles p--; 1501221646Sjilles wc = get_wc(&p); 1502221646Sjilles if (wc == 0) /* bad utf-8 */ 1503221646Sjilles return 0; 1504221646Sjilles } else 1505223010Sjilles wc = (unsigned char)c; 15061556Srgrimes if (*p == '-' && p[1] != ']') { 15071556Srgrimes p++; 150838887Stegge while (*p == CTLQUOTEMARK) 150938887Stegge p++; 15101556Srgrimes if (*p == CTLESC) 15111556Srgrimes p++; 1512221646Sjilles if (localeisutf8) { 1513221646Sjilles wc2 = get_wc(&p); 1514221646Sjilles if (wc2 == 0) /* bad utf-8 */ 1515221646Sjilles return 0; 1516221646Sjilles } else 1517223010Sjilles wc2 = (unsigned char)*p++; 1518221646Sjilles if ( collate_range_cmp(chr, wc) >= 0 1519221646Sjilles && collate_range_cmp(chr, wc2) <= 0 152017525Sache ) 15211556Srgrimes found = 1; 15221556Srgrimes } else { 1523221646Sjilles if (chr == wc) 15241556Srgrimes found = 1; 15251556Srgrimes } 15261556Srgrimes } while ((c = *p++) != ']'); 15271556Srgrimes if (found == invert) 15281556Srgrimes return 0; 15291556Srgrimes break; 15301556Srgrimes } 15311556Srgrimesdft: default: 153245514Stegge if (squoted && *q == CTLESC) 153345514Stegge q++; 15341556Srgrimes if (*q++ != c) 15351556Srgrimes return 0; 15361556Srgrimes break; 15371556Srgrimes } 15381556Srgrimes } 15391556Srgrimesbreakloop: 15401556Srgrimes if (*q != '\0') 15411556Srgrimes return 0; 15421556Srgrimes return 1; 15431556Srgrimes} 15441556Srgrimes 15451556Srgrimes 15461556Srgrimes 15471556Srgrimes/* 1548212243Sjilles * Remove any CTLESC and CTLQUOTEMARK characters from a string. 15491556Srgrimes */ 15501556Srgrimes 15511556Srgrimesvoid 155290111Simprmescapes(char *str) 155338887Stegge{ 155425233Ssteve char *p, *q; 15551556Srgrimes 15561556Srgrimes p = str; 1557214512Sjilles while (*p != CTLESC && *p != CTLQUOTEMARK && *p != CTLQUOTEEND) { 15581556Srgrimes if (*p++ == '\0') 15591556Srgrimes return; 15601556Srgrimes } 15611556Srgrimes q = p; 15621556Srgrimes while (*p) { 1563214512Sjilles if (*p == CTLQUOTEMARK || *p == CTLQUOTEEND) { 156438887Stegge p++; 156538887Stegge continue; 156638887Stegge } 15671556Srgrimes if (*p == CTLESC) 15681556Srgrimes p++; 15691556Srgrimes *q++ = *p++; 15701556Srgrimes } 15711556Srgrimes *q = '\0'; 15721556Srgrimes} 15731556Srgrimes 15741556Srgrimes 15751556Srgrimes 15761556Srgrimes/* 15771556Srgrimes * See if a pattern matches in a case statement. 15781556Srgrimes */ 15791556Srgrimes 15801556Srgrimesint 1581200956Sjillescasematch(union node *pattern, const char *val) 158290111Simp{ 15831556Srgrimes struct stackmark smark; 15841556Srgrimes int result; 15851556Srgrimes char *p; 15861556Srgrimes 15871556Srgrimes setstackmark(&smark); 15881556Srgrimes argbackq = pattern->narg.backquote; 15891556Srgrimes STARTSTACKSTR(expdest); 15901556Srgrimes ifslastp = NULL; 15911556Srgrimes argstr(pattern->narg.text, EXP_TILDE | EXP_CASE); 15921556Srgrimes STPUTC('\0', expdest); 15931556Srgrimes p = grabstackstr(expdest); 159445514Stegge result = patmatch(p, val, 0); 15951556Srgrimes popstackmark(&smark); 15961556Srgrimes return result; 15971556Srgrimes} 159817987Speter 159917987Speter/* 160017987Speter * Our own itoa(). 160117987Speter */ 160217987Speter 1603213811Sobrienstatic char * 160490111Simpcvtnum(int num, char *buf) 160590111Simp{ 160617987Speter char temp[32]; 160717987Speter int neg = num < 0; 160817987Speter char *p = temp + 31; 160917987Speter 161017987Speter temp[31] = '\0'; 161117987Speter 161217987Speter do { 161317987Speter *--p = num % 10 + '0'; 161417987Speter } while ((num /= 10) != 0); 161517987Speter 161617987Speter if (neg) 161717987Speter *--p = '-'; 161817987Speter 1619215783Sjilles STPUTS(p, buf); 162017987Speter return buf; 162117987Speter} 1622108286Stjr 1623108286Stjr/* 1624216778Sjilles * Check statically if expanding a string may have side effects. 1625216778Sjilles */ 1626216778Sjillesint 1627216778Sjillesexpandhassideeffects(const char *p) 1628216778Sjilles{ 1629216778Sjilles int c; 1630216778Sjilles int arinest; 1631216778Sjilles 1632216778Sjilles arinest = 0; 1633216778Sjilles while ((c = *p++) != '\0') { 1634216778Sjilles switch (c) { 1635216778Sjilles case CTLESC: 1636216778Sjilles p++; 1637216778Sjilles break; 1638216778Sjilles case CTLVAR: 1639216778Sjilles c = *p++; 1640216778Sjilles /* Expanding $! sets the job to remembered. */ 1641216778Sjilles if (*p == '!') 1642216778Sjilles return 1; 1643216778Sjilles if ((c & VSTYPE) == VSASSIGN) 1644216778Sjilles return 1; 1645216778Sjilles /* 1646216778Sjilles * If we are in arithmetic, the parameter may contain 1647216778Sjilles * '=' which may cause side effects. Exceptions are 1648216778Sjilles * the length of a parameter and $$, $# and $? which 1649216778Sjilles * are always numeric. 1650216778Sjilles */ 1651216778Sjilles if ((c & VSTYPE) == VSLENGTH) { 1652216778Sjilles while (*p != '=') 1653216778Sjilles p++; 1654216778Sjilles p++; 1655216778Sjilles break; 1656216778Sjilles } 1657216778Sjilles if ((*p == '$' || *p == '#' || *p == '?') && 1658216778Sjilles p[1] == '=') { 1659216778Sjilles p += 2; 1660216778Sjilles break; 1661216778Sjilles } 1662216778Sjilles if (arinest > 0) 1663216778Sjilles return 1; 1664216778Sjilles break; 1665216778Sjilles case CTLBACKQ: 1666216778Sjilles case CTLBACKQ | CTLQUOTE: 1667216778Sjilles if (arinest > 0) 1668216778Sjilles return 1; 1669216778Sjilles break; 1670216778Sjilles case CTLARI: 1671216778Sjilles arinest++; 1672216778Sjilles break; 1673216778Sjilles case CTLENDARI: 1674216778Sjilles arinest--; 1675216778Sjilles break; 1676216778Sjilles case '=': 1677216778Sjilles if (*p == '=') { 1678216778Sjilles /* Allow '==' operator. */ 1679216778Sjilles p++; 1680216778Sjilles continue; 1681216778Sjilles } 1682216778Sjilles if (arinest > 0) 1683216778Sjilles return 1; 1684216778Sjilles break; 1685216778Sjilles case '!': case '<': case '>': 1686216778Sjilles /* Allow '!=', '<=', '>=' operators. */ 1687216778Sjilles if (*p == '=') 1688216778Sjilles p++; 1689216778Sjilles break; 1690216778Sjilles } 1691216778Sjilles } 1692216778Sjilles return 0; 1693216778Sjilles} 1694216778Sjilles 1695216778Sjilles/* 1696108286Stjr * Do most of the work for wordexp(3). 1697108286Stjr */ 1698108286Stjr 1699108286Stjrint 1700108286Stjrwordexpcmd(int argc, char **argv) 1701108286Stjr{ 1702108286Stjr size_t len; 1703108286Stjr int i; 1704108286Stjr 1705108286Stjr out1fmt("%08x", argc - 1); 1706108286Stjr for (i = 1, len = 0; i < argc; i++) 1707108286Stjr len += strlen(argv[i]); 1708108286Stjr out1fmt("%08x", (int)len); 1709215567Sjilles for (i = 1; i < argc; i++) 1710215567Sjilles outbin(argv[i], strlen(argv[i]) + 1, out1); 1711108286Stjr return (0); 1712108286Stjr} 1713