expand.c revision 221646
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 221646 2011-05-08 11:32:20Z 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) { 1771556Srgrimes return; /* here document expanded */ 1781556Srgrimes } 1791556Srgrimes STPUTC('\0', expdest); 1801556Srgrimes p = grabstackstr(expdest); 1811556Srgrimes exparg.lastp = &exparg.list; 1821556Srgrimes /* 1831556Srgrimes * TODO - EXP_REDIR 1841556Srgrimes */ 1851556Srgrimes if (flag & EXP_FULL) { 1861556Srgrimes ifsbreakup(p, &exparg); 1871556Srgrimes *exparg.lastp = NULL; 1881556Srgrimes exparg.lastp = &exparg.list; 1891556Srgrimes expandmeta(exparg.list, flag); 1901556Srgrimes } else { 1911556Srgrimes if (flag & EXP_REDIR) /*XXX - for now, just remove escapes */ 1921556Srgrimes rmescapes(p); 1931556Srgrimes sp = (struct strlist *)stalloc(sizeof (struct strlist)); 1941556Srgrimes sp->text = p; 1951556Srgrimes *exparg.lastp = sp; 1961556Srgrimes exparg.lastp = &sp->next; 1971556Srgrimes } 1981556Srgrimes while (ifsfirst.next != NULL) { 1991556Srgrimes struct ifsregion *ifsp; 2001556Srgrimes INTOFF; 2011556Srgrimes ifsp = ifsfirst.next->next; 2021556Srgrimes ckfree(ifsfirst.next); 2031556Srgrimes ifsfirst.next = ifsp; 2041556Srgrimes INTON; 2051556Srgrimes } 2061556Srgrimes *exparg.lastp = NULL; 2071556Srgrimes if (exparg.list) { 2081556Srgrimes *arglist->lastp = exparg.list; 2091556Srgrimes arglist->lastp = exparg.lastp; 2101556Srgrimes } 2111556Srgrimes} 2121556Srgrimes 2131556Srgrimes 2141556Srgrimes 2151556Srgrimes/* 216212243Sjilles * Perform parameter expansion, command substitution and arithmetic 217212243Sjilles * expansion, and tilde expansion if requested via EXP_TILDE/EXP_VARTILDE. 218212243Sjilles * Processing ends at a CTLENDVAR character as well as '\0'. 219212243Sjilles * This is used to expand word in ${var+word} etc. 220212243Sjilles * If EXP_FULL, EXP_CASE or EXP_REDIR are set, keep and/or generate CTLESC 221212243Sjilles * characters to allow for further processing. 222212243Sjilles * If EXP_FULL is set, also preserve CTLQUOTEMARK characters. 2231556Srgrimes */ 224213811Sobrienstatic void 22590111Simpargstr(char *p, int flag) 22617987Speter{ 22725233Ssteve char c; 228104672Stjr int quotes = flag & (EXP_FULL | EXP_CASE | EXP_REDIR); /* do CTLESC */ 2291556Srgrimes int firsteq = 1; 230214512Sjilles int split_lit; 231214512Sjilles int lit_quoted; 2321556Srgrimes 233214512Sjilles split_lit = flag & EXP_SPLIT_LIT; 234214512Sjilles lit_quoted = flag & EXP_LIT_QUOTED; 235214512Sjilles flag &= ~(EXP_SPLIT_LIT | EXP_LIT_QUOTED); 2361556Srgrimes if (*p == '~' && (flag & (EXP_TILDE | EXP_VARTILDE))) 2371556Srgrimes p = exptilde(p, flag); 2381556Srgrimes for (;;) { 239215783Sjilles CHECKSTRSPACE(2, expdest); 2401556Srgrimes switch (c = *p++) { 2411556Srgrimes case '\0': 242212243Sjilles case CTLENDVAR: 2431556Srgrimes goto breakloop; 24438887Stegge case CTLQUOTEMARK: 245214512Sjilles lit_quoted = 1; 24638887Stegge /* "$@" syntax adherence hack */ 24738887Stegge if (p[0] == CTLVAR && p[2] == '@' && p[3] == '=') 24838887Stegge break; 24939137Stegge if ((flag & EXP_FULL) != 0) 250215783Sjilles USTPUTC(c, expdest); 25138887Stegge break; 252214512Sjilles case CTLQUOTEEND: 253214512Sjilles lit_quoted = 0; 254214512Sjilles break; 2551556Srgrimes case CTLESC: 2561556Srgrimes if (quotes) 257215783Sjilles USTPUTC(c, expdest); 2581556Srgrimes c = *p++; 259215783Sjilles USTPUTC(c, expdest); 260214512Sjilles if (split_lit && !lit_quoted) 261214512Sjilles recordregion(expdest - stackblock() - 262214512Sjilles (quotes ? 2 : 1), 263214512Sjilles expdest - stackblock(), 0); 2641556Srgrimes break; 2651556Srgrimes case CTLVAR: 2661556Srgrimes p = evalvar(p, flag); 2671556Srgrimes break; 2681556Srgrimes case CTLBACKQ: 2691556Srgrimes case CTLBACKQ|CTLQUOTE: 2701556Srgrimes expbackq(argbackq->n, c & CTLQUOTE, flag); 2711556Srgrimes argbackq = argbackq->next; 2721556Srgrimes break; 2731556Srgrimes case CTLENDARI: 2741556Srgrimes expari(flag); 2751556Srgrimes break; 2761556Srgrimes case ':': 2771556Srgrimes case '=': 2781556Srgrimes /* 2791556Srgrimes * sort of a hack - expand tildes in variable 2801556Srgrimes * assignments (after the first '=' and after ':'s). 2811556Srgrimes */ 282215783Sjilles USTPUTC(c, expdest); 283214512Sjilles if (split_lit && !lit_quoted) 284214512Sjilles recordregion(expdest - stackblock() - 1, 285214512Sjilles expdest - stackblock(), 0); 286214512Sjilles if (flag & EXP_VARTILDE && *p == '~' && 287214512Sjilles (c != '=' || firsteq)) { 288214512Sjilles if (c == '=') 289214512Sjilles firsteq = 0; 2901556Srgrimes p = exptilde(p, flag); 2911556Srgrimes } 2921556Srgrimes break; 2931556Srgrimes default: 294215783Sjilles USTPUTC(c, expdest); 295214512Sjilles if (split_lit && !lit_quoted) 296214512Sjilles recordregion(expdest - stackblock() - 1, 297214512Sjilles expdest - stackblock(), 0); 2981556Srgrimes } 2991556Srgrimes } 3001556Srgrimesbreakloop:; 3011556Srgrimes} 3021556Srgrimes 303212243Sjilles/* 304212243Sjilles * Perform tilde expansion, placing the result in the stack string and 305212243Sjilles * returning the next position in the input string to process. 306212243Sjilles */ 307213811Sobrienstatic char * 30890111Simpexptilde(char *p, int flag) 30917987Speter{ 3101556Srgrimes char c, *startp = p; 3111556Srgrimes struct passwd *pw; 3121556Srgrimes char *home; 313108935Stjr int quotes = flag & (EXP_FULL | EXP_CASE | EXP_REDIR); 3141556Srgrimes 31517987Speter while ((c = *p) != '\0') { 3161556Srgrimes switch(c) { 317200988Sjilles case CTLESC: /* This means CTL* are always considered quoted. */ 318200988Sjilles case CTLVAR: 319200988Sjilles case CTLBACKQ: 320200988Sjilles case CTLBACKQ | CTLQUOTE: 321200988Sjilles case CTLARI: 322200988Sjilles case CTLENDARI: 32339137Stegge case CTLQUOTEMARK: 32439137Stegge return (startp); 3251556Srgrimes case ':': 3261556Srgrimes if (flag & EXP_VARTILDE) 3271556Srgrimes goto done; 3281556Srgrimes break; 3291556Srgrimes case '/': 330206150Sjilles case CTLENDVAR: 3311556Srgrimes goto done; 3321556Srgrimes } 3331556Srgrimes p++; 3341556Srgrimes } 3351556Srgrimesdone: 3361556Srgrimes *p = '\0'; 3371556Srgrimes if (*(startp+1) == '\0') { 3381556Srgrimes if ((home = lookupvar("HOME")) == NULL) 3391556Srgrimes goto lose; 3401556Srgrimes } else { 3411556Srgrimes if ((pw = getpwnam(startp+1)) == NULL) 3421556Srgrimes goto lose; 3431556Srgrimes home = pw->pw_dir; 3441556Srgrimes } 3451556Srgrimes if (*home == '\0') 3461556Srgrimes goto lose; 3471556Srgrimes *p = c; 348216384Sjilles if (quotes) 349216384Sjilles STPUTS_QUOTES(home, SQSYNTAX, expdest); 350216384Sjilles else 351216384Sjilles STPUTS(home, expdest); 3521556Srgrimes return (p); 3531556Srgrimeslose: 3541556Srgrimes *p = c; 3551556Srgrimes return (startp); 3561556Srgrimes} 3571556Srgrimes 3581556Srgrimes 359213811Sobrienstatic void 36090111Simpremoverecordregions(int endoff) 36138887Stegge{ 36238887Stegge if (ifslastp == NULL) 36338887Stegge return; 36438887Stegge 36538887Stegge if (ifsfirst.endoff > endoff) { 36638887Stegge while (ifsfirst.next != NULL) { 36738887Stegge struct ifsregion *ifsp; 36838887Stegge INTOFF; 36938887Stegge ifsp = ifsfirst.next->next; 37038887Stegge ckfree(ifsfirst.next); 37138887Stegge ifsfirst.next = ifsp; 37238887Stegge INTON; 37338887Stegge } 37438887Stegge if (ifsfirst.begoff > endoff) 37538887Stegge ifslastp = NULL; 37638887Stegge else { 37738887Stegge ifslastp = &ifsfirst; 37838887Stegge ifsfirst.endoff = endoff; 37938887Stegge } 38038887Stegge return; 38138887Stegge } 382155301Sschweikh 38338887Stegge ifslastp = &ifsfirst; 38438887Stegge while (ifslastp->next && ifslastp->next->begoff < endoff) 38538887Stegge ifslastp=ifslastp->next; 38638887Stegge while (ifslastp->next != NULL) { 38738887Stegge struct ifsregion *ifsp; 38838887Stegge INTOFF; 38938887Stegge ifsp = ifslastp->next->next; 39038887Stegge ckfree(ifslastp->next); 39138887Stegge ifslastp->next = ifsp; 39238887Stegge INTON; 39338887Stegge } 39438887Stegge if (ifslastp->endoff > endoff) 39538887Stegge ifslastp->endoff = endoff; 39638887Stegge} 39738887Stegge 3981556Srgrimes/* 3991556Srgrimes * Expand arithmetic expression. Backup to start of expression, 4001556Srgrimes * evaluate, place result in (backed up) result, adjust string position. 4011556Srgrimes */ 4021556Srgrimesvoid 40390111Simpexpari(int flag) 40417987Speter{ 405207206Sjilles char *p, *q, *start; 406178631Sstefanf arith_t result; 40738887Stegge int begoff; 408108935Stjr int quotes = flag & (EXP_FULL | EXP_CASE | EXP_REDIR); 40938887Stegge int quoted; 4101556Srgrimes 4111556Srgrimes /* 41246684Skris * This routine is slightly over-complicated for 4131556Srgrimes * efficiency. First we make sure there is 4141556Srgrimes * enough space for the result, which may be bigger 415212243Sjilles * than the expression. Next we 4161556Srgrimes * scan backwards looking for the start of arithmetic. If the 4171556Srgrimes * next previous character is a CTLESC character, then we 4181556Srgrimes * have to rescan starting from the beginning since CTLESC 4198855Srgrimes * characters have to be processed left to right. 4201556Srgrimes */ 421178631Sstefanf CHECKSTRSPACE(DIGITS(result) - 2, expdest); 4228855Srgrimes USTPUTC('\0', expdest); 4231556Srgrimes start = stackblock(); 42483676Stegge p = expdest - 2; 42583676Stegge while (p >= start && *p != CTLARI) 4261556Srgrimes --p; 42783676Stegge if (p < start || *p != CTLARI) 4281556Srgrimes error("missing CTLARI (shouldn't happen)"); 42983676Stegge if (p > start && *(p - 1) == CTLESC) 4301556Srgrimes for (p = start; *p != CTLARI; p++) 4311556Srgrimes if (*p == CTLESC) 4321556Srgrimes p++; 43338887Stegge 43438887Stegge if (p[1] == '"') 43538887Stegge quoted=1; 43638887Stegge else 43738887Stegge quoted=0; 43838887Stegge begoff = p - start; 43938887Stegge removerecordregions(begoff); 4401556Srgrimes if (quotes) 44138887Stegge rmescapes(p+2); 442207206Sjilles q = grabstackstr(expdest); 44338887Stegge result = arith(p+2); 444207206Sjilles ungrabstackstr(q, expdest); 445178631Sstefanf fmtstr(p, DIGITS(result), ARITH_FORMAT_STR, result); 4461556Srgrimes while (*p++) 4471556Srgrimes ; 44838887Stegge if (quoted == 0) 44938887Stegge recordregion(begoff, p - 1 - start, 0); 4501556Srgrimes result = expdest - p + 1; 4511556Srgrimes STADJUST(-result, expdest); 4521556Srgrimes} 4531556Srgrimes 4541556Srgrimes 4551556Srgrimes/* 456212243Sjilles * Perform command substitution. 4571556Srgrimes */ 458213811Sobrienstatic void 45990111Simpexpbackq(union node *cmd, int quoted, int flag) 46017987Speter{ 4611556Srgrimes struct backcmd in; 4621556Srgrimes int i; 4631556Srgrimes char buf[128]; 4641556Srgrimes char *p; 4651556Srgrimes char *dest = expdest; 4661556Srgrimes struct ifsregion saveifs, *savelastp; 4671556Srgrimes struct nodelist *saveargbackq; 4681556Srgrimes char lastc; 4691556Srgrimes int startloc = dest - stackblock(); 4701556Srgrimes char const *syntax = quoted? DQSYNTAX : BASESYNTAX; 471108935Stjr int quotes = flag & (EXP_FULL | EXP_CASE | EXP_REDIR); 472115424Sfenner int nnl; 4731556Srgrimes 4741556Srgrimes INTOFF; 4751556Srgrimes saveifs = ifsfirst; 4761556Srgrimes savelastp = ifslastp; 4771556Srgrimes saveargbackq = argbackq; 4781556Srgrimes p = grabstackstr(dest); 4791556Srgrimes evalbackcmd(cmd, &in); 4801556Srgrimes ungrabstackstr(p, dest); 4811556Srgrimes ifsfirst = saveifs; 4821556Srgrimes ifslastp = savelastp; 4831556Srgrimes argbackq = saveargbackq; 4841556Srgrimes 4851556Srgrimes p = in.buf; 4861556Srgrimes lastc = '\0'; 487115424Sfenner nnl = 0; 488115424Sfenner /* Don't copy trailing newlines */ 4891556Srgrimes for (;;) { 4901556Srgrimes if (--in.nleft < 0) { 4911556Srgrimes if (in.fd < 0) 4921556Srgrimes break; 4931556Srgrimes while ((i = read(in.fd, buf, sizeof buf)) < 0 && errno == EINTR); 4941556Srgrimes TRACE(("expbackq: read returns %d\n", i)); 4951556Srgrimes if (i <= 0) 4961556Srgrimes break; 4971556Srgrimes p = buf; 4981556Srgrimes in.nleft = i - 1; 4991556Srgrimes } 5001556Srgrimes lastc = *p++; 5011556Srgrimes if (lastc != '\0') { 502115424Sfenner if (lastc == '\n') { 503115424Sfenner nnl++; 504115424Sfenner } else { 505216706Sjilles CHECKSTRSPACE(nnl + 2, dest); 506115424Sfenner while (nnl > 0) { 507115424Sfenner nnl--; 508216706Sjilles USTPUTC('\n', dest); 509115424Sfenner } 510216496Sjilles if (quotes && syntax[(int)lastc] == CCTL) 511216706Sjilles USTPUTC(CTLESC, dest); 512216706Sjilles USTPUTC(lastc, dest); 513115424Sfenner } 5141556Srgrimes } 5151556Srgrimes } 51617987Speter 5171556Srgrimes if (in.fd >= 0) 5181556Srgrimes close(in.fd); 5191556Srgrimes if (in.buf) 5201556Srgrimes ckfree(in.buf); 5211556Srgrimes if (in.jp) 52245916Scracauer exitstatus = waitforjob(in.jp, (int *)NULL); 5231556Srgrimes if (quoted == 0) 5241556Srgrimes recordregion(startloc, dest - stackblock(), 0); 525213775Sjhb TRACE(("expbackq: size=%td: \"%.*s\"\n", 526213775Sjhb ((dest - stackblock()) - startloc), 527213775Sjhb (int)((dest - stackblock()) - startloc), 5281556Srgrimes stackblock() + startloc)); 5291556Srgrimes expdest = dest; 5301556Srgrimes INTON; 5311556Srgrimes} 5321556Srgrimes 5331556Srgrimes 5341556Srgrimes 535213811Sobrienstatic int 53690111Simpsubevalvar(char *p, char *str, int strloc, int subtype, int startloc, 537214524Sjilles int varflags, int quotes) 53817987Speter{ 53917987Speter char *startp; 54017987Speter char *loc = NULL; 54145514Stegge char *q; 54217987Speter int c = 0; 54317987Speter struct nodelist *saveargbackq = argbackq; 54420425Ssteve int amount; 54520425Ssteve 546206150Sjilles argstr(p, (subtype == VSTRIMLEFT || subtype == VSTRIMLEFTMAX || 547206147Sjilles subtype == VSTRIMRIGHT || subtype == VSTRIMRIGHTMAX ? 548206150Sjilles EXP_CASE : 0) | EXP_TILDE); 54917987Speter STACKSTRNUL(expdest); 55017987Speter argbackq = saveargbackq; 55117987Speter startp = stackblock() + startloc; 55220425Ssteve if (str == NULL) 55320425Ssteve str = stackblock() + strloc; 55417987Speter 55517987Speter switch (subtype) { 55617987Speter case VSASSIGN: 55717987Speter setvar(str, startp, 0); 55820425Ssteve amount = startp - expdest; 55920425Ssteve STADJUST(amount, expdest); 56017987Speter varflags &= ~VSNUL; 56117987Speter return 1; 56217987Speter 56317987Speter case VSQUESTION: 56417987Speter if (*p != CTLENDVAR) { 565201366Sjilles outfmt(out2, "%s\n", startp); 56617987Speter error((char *)NULL); 56717987Speter } 568112254Sru error("%.*s: parameter %snot set", (int)(p - str - 1), 56917987Speter str, (varflags & VSNUL) ? "null or " 57017987Speter : nullstr); 57117987Speter return 0; 57217987Speter 57317987Speter case VSTRIMLEFT: 57425233Ssteve for (loc = startp; loc < str; loc++) { 57517987Speter c = *loc; 57617987Speter *loc = '\0'; 577214524Sjilles if (patmatch(str, startp, quotes)) { 57817987Speter *loc = c; 57917987Speter goto recordleft; 58017987Speter } 58117987Speter *loc = c; 582214524Sjilles if (quotes && *loc == CTLESC) 58345514Stegge loc++; 58417987Speter } 58517987Speter return 0; 58617987Speter 58717987Speter case VSTRIMLEFTMAX: 58845514Stegge for (loc = str - 1; loc >= startp;) { 58917987Speter c = *loc; 59017987Speter *loc = '\0'; 591214524Sjilles if (patmatch(str, startp, quotes)) { 59217987Speter *loc = c; 59317987Speter goto recordleft; 59417987Speter } 59517987Speter *loc = c; 59645514Stegge loc--; 597214524Sjilles if (quotes && loc > startp && *(loc - 1) == CTLESC) { 59845514Stegge for (q = startp; q < loc; q++) 59945514Stegge if (*q == CTLESC) 60045514Stegge q++; 60145514Stegge if (q > loc) 60245514Stegge loc--; 60345514Stegge } 60417987Speter } 60517987Speter return 0; 60617987Speter 60717987Speter case VSTRIMRIGHT: 60845514Stegge for (loc = str - 1; loc >= startp;) { 609214524Sjilles if (patmatch(str, loc, quotes)) { 61020425Ssteve amount = loc - expdest; 61120425Ssteve STADJUST(amount, expdest); 61217987Speter return 1; 61317987Speter } 61445514Stegge loc--; 615214524Sjilles if (quotes && loc > startp && *(loc - 1) == CTLESC) { 61645514Stegge for (q = startp; q < loc; q++) 61745514Stegge if (*q == CTLESC) 61845514Stegge q++; 61945514Stegge if (q > loc) 62045514Stegge loc--; 62145514Stegge } 62217987Speter } 62317987Speter return 0; 62417987Speter 62517987Speter case VSTRIMRIGHTMAX: 62617987Speter for (loc = startp; loc < str - 1; loc++) { 627214524Sjilles if (patmatch(str, loc, quotes)) { 62820425Ssteve amount = loc - expdest; 62920425Ssteve STADJUST(amount, expdest); 63017987Speter return 1; 63117987Speter } 632214524Sjilles if (quotes && *loc == CTLESC) 63345514Stegge loc++; 63417987Speter } 63517987Speter return 0; 63617987Speter 63717987Speter 63817987Speter default: 63917987Speter abort(); 64017987Speter } 64117987Speter 64217987Speterrecordleft: 64320425Ssteve amount = ((str - 1) - (loc - startp)) - expdest; 64420425Ssteve STADJUST(amount, expdest); 64517987Speter while (loc != str - 1) 64617987Speter *startp++ = *loc++; 64717987Speter return 1; 64817987Speter} 64917987Speter 65017987Speter 6511556Srgrimes/* 6521556Srgrimes * Expand a variable, and return a pointer to the next character in the 6531556Srgrimes * input string. 6541556Srgrimes */ 6551556Srgrimes 656213811Sobrienstatic char * 65790111Simpevalvar(char *p, int flag) 65817987Speter{ 6591556Srgrimes int subtype; 6601556Srgrimes int varflags; 6611556Srgrimes char *var; 6621556Srgrimes char *val; 66345644Stegge int patloc; 6641556Srgrimes int c; 6651556Srgrimes int set; 6661556Srgrimes int special; 6671556Srgrimes int startloc; 66817987Speter int varlen; 669221602Sjilles int varlenb; 67017987Speter int easy; 671108935Stjr int quotes = flag & (EXP_FULL | EXP_CASE | EXP_REDIR); 6721556Srgrimes 673164081Sstefanf varflags = (unsigned char)*p++; 6741556Srgrimes subtype = varflags & VSTYPE; 6751556Srgrimes var = p; 6761556Srgrimes special = 0; 6771556Srgrimes if (! is_name(*p)) 6781556Srgrimes special = 1; 6791556Srgrimes p = strchr(p, '=') + 1; 6801556Srgrimesagain: /* jump here after setting a variable with ${var=text} */ 681179022Sstefanf if (varflags & VSLINENO) { 682179022Sstefanf set = 1; 683179022Sstefanf special = 0; 684179022Sstefanf val = var; 685179022Sstefanf p[-1] = '\0'; /* temporarily overwrite '=' to have \0 686179022Sstefanf terminated string */ 687179022Sstefanf } else if (special) { 68825233Ssteve set = varisset(var, varflags & VSNUL); 6891556Srgrimes val = NULL; 6901556Srgrimes } else { 69160592Scracauer val = bltinlookup(var, 1); 69217987Speter if (val == NULL || ((varflags & VSNUL) && val[0] == '\0')) { 6931556Srgrimes val = NULL; 6941556Srgrimes set = 0; 6951556Srgrimes } else 6961556Srgrimes set = 1; 6971556Srgrimes } 69817987Speter varlen = 0; 6991556Srgrimes startloc = expdest - stackblock(); 700198454Sjilles if (!set && uflag && *var != '@' && *var != '*') { 70196939Stjr switch (subtype) { 70296939Stjr case VSNORMAL: 70396939Stjr case VSTRIMLEFT: 70496939Stjr case VSTRIMLEFTMAX: 70596939Stjr case VSTRIMRIGHT: 70696939Stjr case VSTRIMRIGHTMAX: 70796939Stjr case VSLENGTH: 708112254Sru error("%.*s: parameter not set", (int)(p - var - 1), 709112254Sru var); 71096939Stjr } 71196939Stjr } 7121556Srgrimes if (set && subtype != VSPLUS) { 7131556Srgrimes /* insert the value of the variable */ 7141556Srgrimes if (special) { 715164081Sstefanf varvalue(var, varflags & VSQUOTE, subtype, flag); 71617987Speter if (subtype == VSLENGTH) { 717221602Sjilles varlenb = expdest - stackblock() - startloc; 718221602Sjilles varlen = varlenb; 719221602Sjilles if (localeisutf8) { 720221602Sjilles val = stackblock() + startloc; 721221602Sjilles for (;val != expdest; val++) 722221602Sjilles if ((*val & 0xC0) == 0x80) 723221602Sjilles varlen--; 724221602Sjilles } 725221602Sjilles STADJUST(-varlenb, expdest); 72617987Speter } 7271556Srgrimes } else { 72820425Ssteve char const *syntax = (varflags & VSQUOTE) ? DQSYNTAX 72917987Speter : BASESYNTAX; 7301556Srgrimes 73117987Speter if (subtype == VSLENGTH) { 73217987Speter for (;*val; val++) 733221602Sjilles if (!localeisutf8 || 734221602Sjilles (*val & 0xC0) != 0x80) 735221602Sjilles varlen++; 7361556Srgrimes } 73717987Speter else { 738216384Sjilles if (quotes) 739216384Sjilles STPUTS_QUOTES(val, syntax, expdest); 740216384Sjilles else 741216384Sjilles STPUTS(val, expdest); 74217987Speter 74317987Speter } 7441556Srgrimes } 7451556Srgrimes } 74620425Ssteve 7471556Srgrimes if (subtype == VSPLUS) 7481556Srgrimes set = ! set; 74917987Speter 75020425Ssteve easy = ((varflags & VSQUOTE) == 0 || 75117987Speter (*var == '@' && shellparam.nparam != 1)); 75217987Speter 75317987Speter 75417987Speter switch (subtype) { 75517987Speter case VSLENGTH: 75617987Speter expdest = cvtnum(varlen, expdest); 75717987Speter goto record; 75817987Speter 75917987Speter case VSNORMAL: 76017987Speter if (!easy) 76117987Speter break; 76217987Speterrecord: 76320425Ssteve recordregion(startloc, expdest - stackblock(), 76417987Speter varflags & VSQUOTE); 76517987Speter break; 76617987Speter 76717987Speter case VSPLUS: 76817987Speter case VSMINUS: 76917987Speter if (!set) { 770214512Sjilles argstr(p, flag | (flag & EXP_FULL ? EXP_SPLIT_LIT : 0) | 771214512Sjilles (varflags & VSQUOTE ? EXP_LIT_QUOTED : 0)); 77217987Speter break; 77317987Speter } 77417987Speter if (easy) 77517987Speter goto record; 77617987Speter break; 77717987Speter 77817987Speter case VSTRIMLEFT: 77917987Speter case VSTRIMLEFTMAX: 78017987Speter case VSTRIMRIGHT: 78117987Speter case VSTRIMRIGHTMAX: 78217987Speter if (!set) 78317987Speter break; 78417987Speter /* 78517987Speter * Terminate the string and start recording the pattern 78617987Speter * right after it 78717987Speter */ 78817987Speter STPUTC('\0', expdest); 78945644Stegge patloc = expdest - stackblock(); 79045644Stegge if (subevalvar(p, NULL, patloc, subtype, 791214524Sjilles startloc, varflags, quotes) == 0) { 79245644Stegge int amount = (expdest - stackblock() - patloc) + 1; 79325233Ssteve STADJUST(-amount, expdest); 79425233Ssteve } 79538887Stegge /* Remove any recorded regions beyond start of variable */ 79638887Stegge removerecordregions(startloc); 79738887Stegge goto record; 79817987Speter 79917987Speter case VSASSIGN: 80017987Speter case VSQUESTION: 80117987Speter if (!set) { 802214524Sjilles if (subevalvar(p, var, 0, subtype, startloc, varflags, 803214524Sjilles quotes)) { 80420425Ssteve varflags &= ~VSNUL; 805155301Sschweikh /* 806155301Sschweikh * Remove any recorded regions beyond 807155301Sschweikh * start of variable 80838887Stegge */ 80938887Stegge removerecordregions(startloc); 8101556Srgrimes goto again; 81120425Ssteve } 81217987Speter break; 8131556Srgrimes } 81417987Speter if (easy) 81517987Speter goto record; 81617987Speter break; 81717987Speter 818164003Sstefanf case VSERROR: 819164003Sstefanf c = p - var - 1; 820164003Sstefanf error("${%.*s%s}: Bad substitution", c, var, 821164003Sstefanf (c > 0 && *p != CTLENDVAR) ? "..." : ""); 822164003Sstefanf 82317987Speter default: 82417987Speter abort(); 8251556Srgrimes } 826179022Sstefanf p[-1] = '='; /* recover overwritten '=' */ 82717987Speter 8281556Srgrimes if (subtype != VSNORMAL) { /* skip to end of alternative */ 8291556Srgrimes int nesting = 1; 8301556Srgrimes for (;;) { 8311556Srgrimes if ((c = *p++) == CTLESC) 8321556Srgrimes p++; 8331556Srgrimes else if (c == CTLBACKQ || c == (CTLBACKQ|CTLQUOTE)) { 8341556Srgrimes if (set) 8351556Srgrimes argbackq = argbackq->next; 8361556Srgrimes } else if (c == CTLVAR) { 8371556Srgrimes if ((*p++ & VSTYPE) != VSNORMAL) 8381556Srgrimes nesting++; 8391556Srgrimes } else if (c == CTLENDVAR) { 8401556Srgrimes if (--nesting == 0) 8411556Srgrimes break; 8421556Srgrimes } 8431556Srgrimes } 8441556Srgrimes } 8451556Srgrimes return p; 8461556Srgrimes} 8471556Srgrimes 8481556Srgrimes 8491556Srgrimes 8501556Srgrimes/* 8511556Srgrimes * Test whether a specialized variable is set. 8521556Srgrimes */ 8531556Srgrimes 854213811Sobrienstatic int 85590111Simpvarisset(char *name, int nulok) 85625233Ssteve{ 8571556Srgrimes 85825233Ssteve if (*name == '!') 859209600Sjilles return backgndpidset(); 86025233Ssteve else if (*name == '@' || *name == '*') { 8611556Srgrimes if (*shellparam.p == NULL) 8621556Srgrimes return 0; 86325233Ssteve 86425233Ssteve if (nulok) { 86525233Ssteve char **av; 86625233Ssteve 86725233Ssteve for (av = shellparam.p; *av; av++) 86825233Ssteve if (**av != '\0') 86925233Ssteve return 1; 87025233Ssteve return 0; 87125233Ssteve } 87218202Speter } else if (is_digit(*name)) { 87325233Ssteve char *ap; 87420425Ssteve int num = atoi(name); 87525233Ssteve 87625233Ssteve if (num > shellparam.nparam) 87725233Ssteve return 0; 87825233Ssteve 87925233Ssteve if (num == 0) 88025233Ssteve ap = arg0; 88125233Ssteve else 88225233Ssteve ap = shellparam.p[num - 1]; 88325233Ssteve 88425233Ssteve if (nulok && (ap == NULL || *ap == '\0')) 88525233Ssteve return 0; 8861556Srgrimes } 8871556Srgrimes return 1; 8881556Srgrimes} 8891556Srgrimes 890216384Sjillesstatic void 891216384Sjillesstrtodest(const char *p, int flag, int subtype, int quoted) 892216384Sjilles{ 893216384Sjilles if (flag & (EXP_FULL | EXP_CASE) && subtype != VSLENGTH) 894216384Sjilles STPUTS_QUOTES(p, quoted ? DQSYNTAX : BASESYNTAX, expdest); 895216384Sjilles else 896216384Sjilles STPUTS(p, expdest); 897216384Sjilles} 8981556Srgrimes 8991556Srgrimes/* 9001556Srgrimes * Add the value of a specialized variable to the stack string. 9011556Srgrimes */ 9021556Srgrimes 903213811Sobrienstatic void 904164081Sstefanfvarvalue(char *name, int quoted, int subtype, int flag) 90517987Speter{ 9061556Srgrimes int num; 9071556Srgrimes char *p; 9081556Srgrimes int i; 9091556Srgrimes char sep; 9101556Srgrimes char **ap; 9111556Srgrimes 91218202Speter switch (*name) { 9131556Srgrimes case '$': 9141556Srgrimes num = rootpid; 9151556Srgrimes goto numvar; 9161556Srgrimes case '?': 91717987Speter num = oexitstatus; 9181556Srgrimes goto numvar; 9191556Srgrimes case '#': 9201556Srgrimes num = shellparam.nparam; 9211556Srgrimes goto numvar; 9221556Srgrimes case '!': 923209600Sjilles num = backgndpidval(); 9241556Srgrimesnumvar: 92517987Speter expdest = cvtnum(num, expdest); 9261556Srgrimes break; 9271556Srgrimes case '-': 9281556Srgrimes for (i = 0 ; i < NOPTS ; i++) { 9291556Srgrimes if (optlist[i].val) 9301556Srgrimes STPUTC(optlist[i].letter, expdest); 9311556Srgrimes } 9321556Srgrimes break; 9331556Srgrimes case '@': 934164081Sstefanf if (flag & EXP_FULL && quoted) { 93538887Stegge for (ap = shellparam.p ; (p = *ap++) != NULL ; ) { 936216384Sjilles strtodest(p, flag, subtype, quoted); 93738887Stegge if (*ap) 93838887Stegge STPUTC('\0', expdest); 93938887Stegge } 94038887Stegge break; 9411556Srgrimes } 942102410Scharnier /* FALLTHROUGH */ 9431556Srgrimes case '*': 944149825Srse if (ifsset()) 94538887Stegge sep = ifsval()[0]; 94638887Stegge else 94738887Stegge sep = ' '; 9481556Srgrimes for (ap = shellparam.p ; (p = *ap++) != NULL ; ) { 949216384Sjilles strtodest(p, flag, subtype, quoted); 95038887Stegge if (*ap && sep) 9511556Srgrimes STPUTC(sep, expdest); 9521556Srgrimes } 9531556Srgrimes break; 9541556Srgrimes case '0': 9551556Srgrimes p = arg0; 956216384Sjilles strtodest(p, flag, subtype, quoted); 9571556Srgrimes break; 9581556Srgrimes default: 95918202Speter if (is_digit(*name)) { 96018202Speter num = atoi(name); 96118202Speter if (num > 0 && num <= shellparam.nparam) { 96218202Speter p = shellparam.p[num - 1]; 963216384Sjilles strtodest(p, flag, subtype, quoted); 96418202Speter } 9651556Srgrimes } 9661556Srgrimes break; 9671556Srgrimes } 9681556Srgrimes} 9691556Srgrimes 9701556Srgrimes 9711556Srgrimes 9721556Srgrimes/* 973218909Sbrucec * Record the fact that we have to scan this region of the 9741556Srgrimes * string for IFS characters. 9751556Srgrimes */ 9761556Srgrimes 977213811Sobrienstatic void 978194975Sjillesrecordregion(int start, int end, int inquotes) 97917987Speter{ 98025233Ssteve struct ifsregion *ifsp; 9811556Srgrimes 9821556Srgrimes if (ifslastp == NULL) { 9831556Srgrimes ifsp = &ifsfirst; 9841556Srgrimes } else { 985194975Sjilles if (ifslastp->endoff == start 986194975Sjilles && ifslastp->inquotes == inquotes) { 987194975Sjilles /* extend previous area */ 988194975Sjilles ifslastp->endoff = end; 989194975Sjilles return; 990194975Sjilles } 9911556Srgrimes ifsp = (struct ifsregion *)ckmalloc(sizeof (struct ifsregion)); 9921556Srgrimes ifslastp->next = ifsp; 9931556Srgrimes } 9941556Srgrimes ifslastp = ifsp; 9951556Srgrimes ifslastp->next = NULL; 9961556Srgrimes ifslastp->begoff = start; 9971556Srgrimes ifslastp->endoff = end; 998194975Sjilles ifslastp->inquotes = inquotes; 9991556Srgrimes} 10001556Srgrimes 10011556Srgrimes 10021556Srgrimes 10031556Srgrimes/* 10041556Srgrimes * Break the argument string into pieces based upon IFS and add the 10051556Srgrimes * strings to the argument list. The regions of the string to be 10061556Srgrimes * searched for IFS characters have been stored by recordregion. 1007212243Sjilles * CTLESC characters are preserved but have little effect in this pass 1008212243Sjilles * other than escaping CTL* characters. In particular, they do not escape 1009212243Sjilles * IFS characters: that should be done with the ifsregion mechanism. 1010212243Sjilles * CTLQUOTEMARK characters are used to preserve empty quoted strings. 1011212243Sjilles * This pass treats them as a regular character, making the string non-empty. 1012212243Sjilles * Later, they are removed along with the other CTL* characters. 10131556Srgrimes */ 1014213811Sobrienstatic void 101590111Simpifsbreakup(char *string, struct arglist *arglist) 101690111Simp{ 10171556Srgrimes struct ifsregion *ifsp; 10181556Srgrimes struct strlist *sp; 10191556Srgrimes char *start; 102025233Ssteve char *p; 10211556Srgrimes char *q; 1022201053Sjilles const char *ifs; 1023194975Sjilles const char *ifsspc; 1024194975Sjilles int had_param_ch = 0; 10251556Srgrimes 1026194975Sjilles start = string; 102717987Speter 1028194975Sjilles if (ifslastp == NULL) { 1029194975Sjilles /* Return entire argument, IFS doesn't apply to any of it */ 1030194975Sjilles sp = (struct strlist *)stalloc(sizeof *sp); 1031194975Sjilles sp->text = start; 1032194975Sjilles *arglist->lastp = sp; 1033194975Sjilles arglist->lastp = &sp->next; 1034194975Sjilles return; 1035194975Sjilles } 1036194975Sjilles 1037194975Sjilles ifs = ifsset() ? ifsval() : " \t\n"; 1038194975Sjilles 1039194975Sjilles for (ifsp = &ifsfirst; ifsp != NULL; ifsp = ifsp->next) { 1040194975Sjilles p = string + ifsp->begoff; 1041194975Sjilles while (p < string + ifsp->endoff) { 1042194975Sjilles q = p; 1043194975Sjilles if (*p == CTLESC) 1044194975Sjilles p++; 1045194975Sjilles if (ifsp->inquotes) { 1046194975Sjilles /* Only NULs (should be from "$@") end args */ 1047194977Sjilles had_param_ch = 1; 1048194975Sjilles if (*p != 0) { 10491556Srgrimes p++; 1050194975Sjilles continue; 1051194975Sjilles } 1052194975Sjilles ifsspc = NULL; 1053194975Sjilles } else { 1054194975Sjilles if (!strchr(ifs, *p)) { 1055194977Sjilles had_param_ch = 1; 105638887Stegge p++; 1057194975Sjilles continue; 1058194975Sjilles } 1059194975Sjilles ifsspc = strchr(" \t\n", *p); 1060194975Sjilles 1061194975Sjilles /* Ignore IFS whitespace at start */ 1062194975Sjilles if (q == start && ifsspc != NULL) { 1063194975Sjilles p++; 10641556Srgrimes start = p; 1065194975Sjilles continue; 1066194975Sjilles } 1067194977Sjilles had_param_ch = 0; 10681556Srgrimes } 1069194975Sjilles 1070194975Sjilles /* Save this argument... */ 1071194975Sjilles *q = '\0'; 10721556Srgrimes sp = (struct strlist *)stalloc(sizeof *sp); 10731556Srgrimes sp->text = start; 10741556Srgrimes *arglist->lastp = sp; 10751556Srgrimes arglist->lastp = &sp->next; 1076194975Sjilles p++; 1077194975Sjilles 1078194975Sjilles if (ifsspc != NULL) { 1079194975Sjilles /* Ignore further trailing IFS whitespace */ 1080194975Sjilles for (; p < string + ifsp->endoff; p++) { 1081194975Sjilles q = p; 1082194975Sjilles if (*p == CTLESC) 1083194975Sjilles p++; 1084194975Sjilles if (strchr(ifs, *p) == NULL) { 1085194975Sjilles p = q; 1086194975Sjilles break; 1087194975Sjilles } 1088194975Sjilles if (strchr(" \t\n", *p) == NULL) { 1089194975Sjilles p++; 1090194975Sjilles break; 1091194975Sjilles } 1092194975Sjilles } 1093194975Sjilles } 1094194975Sjilles start = p; 10951556Srgrimes } 1096194975Sjilles } 1097194975Sjilles 1098194975Sjilles /* 1099194975Sjilles * Save anything left as an argument. 1100194975Sjilles * Traditionally we have treated 'IFS=':'; set -- x$IFS' as 1101194975Sjilles * generating 2 arguments, the second of which is empty. 1102194975Sjilles * Some recent clarification of the Posix spec say that it 1103194975Sjilles * should only generate one.... 1104194975Sjilles */ 1105194975Sjilles if (had_param_ch || *start != 0) { 11061556Srgrimes sp = (struct strlist *)stalloc(sizeof *sp); 11071556Srgrimes sp->text = start; 11081556Srgrimes *arglist->lastp = sp; 11091556Srgrimes arglist->lastp = &sp->next; 11101556Srgrimes } 11111556Srgrimes} 11121556Srgrimes 11131556Srgrimes 1114213760Sobrienstatic char expdir[PATH_MAX]; 1115212243Sjilles#define expdir_end (expdir + sizeof(expdir)) 11161556Srgrimes 11171556Srgrimes/* 1118212243Sjilles * Perform pathname generation and remove control characters. 1119212243Sjilles * At this point, the only control characters should be CTLESC and CTLQUOTEMARK. 1120212243Sjilles * The results are stored in the list exparg. 11211556Srgrimes */ 1122213811Sobrienstatic void 112390111Simpexpandmeta(struct strlist *str, int flag __unused) 112417987Speter{ 11251556Srgrimes char *p; 11261556Srgrimes struct strlist **savelastp; 11271556Srgrimes struct strlist *sp; 11281556Srgrimes char c; 11291556Srgrimes /* TODO - EXP_REDIR */ 11301556Srgrimes 11311556Srgrimes while (str) { 11321556Srgrimes if (fflag) 11331556Srgrimes goto nometa; 11341556Srgrimes p = str->text; 11351556Srgrimes for (;;) { /* fast check for meta chars */ 11361556Srgrimes if ((c = *p++) == '\0') 11371556Srgrimes goto nometa; 1138211646Sjilles if (c == '*' || c == '?' || c == '[') 11391556Srgrimes break; 11401556Srgrimes } 11411556Srgrimes savelastp = exparg.lastp; 11421556Srgrimes INTOFF; 11431556Srgrimes expmeta(expdir, str->text); 11441556Srgrimes INTON; 11451556Srgrimes if (exparg.lastp == savelastp) { 11468855Srgrimes /* 11478855Srgrimes * no matches 11481556Srgrimes */ 11491556Srgrimesnometa: 11501556Srgrimes *exparg.lastp = str; 11511556Srgrimes rmescapes(str->text); 11521556Srgrimes exparg.lastp = &str->next; 11531556Srgrimes } else { 11541556Srgrimes *exparg.lastp = NULL; 11551556Srgrimes *savelastp = sp = expsort(*savelastp); 11561556Srgrimes while (sp->next != NULL) 11571556Srgrimes sp = sp->next; 11581556Srgrimes exparg.lastp = &sp->next; 11591556Srgrimes } 11601556Srgrimes str = str->next; 11611556Srgrimes } 11621556Srgrimes} 11631556Srgrimes 11641556Srgrimes 11651556Srgrimes/* 11661556Srgrimes * Do metacharacter (i.e. *, ?, [...]) expansion. 11671556Srgrimes */ 11681556Srgrimes 1169213811Sobrienstatic void 117090111Simpexpmeta(char *enddir, char *name) 117190111Simp{ 117225233Ssteve char *p; 11731556Srgrimes char *q; 11741556Srgrimes char *start; 11751556Srgrimes char *endname; 11761556Srgrimes int metaflag; 11771556Srgrimes struct stat statb; 11781556Srgrimes DIR *dirp; 11791556Srgrimes struct dirent *dp; 11801556Srgrimes int atend; 11811556Srgrimes int matchdot; 1182207944Sjilles int esc; 11831556Srgrimes 11841556Srgrimes metaflag = 0; 11851556Srgrimes start = name; 1186207944Sjilles for (p = name; esc = 0, *p; p += esc + 1) { 11871556Srgrimes if (*p == '*' || *p == '?') 11881556Srgrimes metaflag = 1; 11891556Srgrimes else if (*p == '[') { 11901556Srgrimes q = p + 1; 119126488Sache if (*q == '!' || *q == '^') 11921556Srgrimes q++; 11931556Srgrimes for (;;) { 119438887Stegge while (*q == CTLQUOTEMARK) 119538887Stegge q++; 11961556Srgrimes if (*q == CTLESC) 11971556Srgrimes q++; 11981556Srgrimes if (*q == '/' || *q == '\0') 11991556Srgrimes break; 12001556Srgrimes if (*++q == ']') { 12011556Srgrimes metaflag = 1; 12021556Srgrimes break; 12031556Srgrimes } 12041556Srgrimes } 12051556Srgrimes } else if (*p == '\0') 12061556Srgrimes break; 120738887Stegge else if (*p == CTLQUOTEMARK) 120838887Stegge continue; 1209207944Sjilles else { 1210207944Sjilles if (*p == CTLESC) 1211207944Sjilles esc++; 1212207944Sjilles if (p[esc] == '/') { 1213207944Sjilles if (metaflag) 1214207944Sjilles break; 1215207944Sjilles start = p + esc + 1; 1216207944Sjilles } 12171556Srgrimes } 12181556Srgrimes } 12191556Srgrimes if (metaflag == 0) { /* we've reached the end of the file name */ 12201556Srgrimes if (enddir != expdir) 12211556Srgrimes metaflag++; 12221556Srgrimes for (p = name ; ; p++) { 122338887Stegge if (*p == CTLQUOTEMARK) 122438887Stegge continue; 12251556Srgrimes if (*p == CTLESC) 12261556Srgrimes p++; 12271556Srgrimes *enddir++ = *p; 12281556Srgrimes if (*p == '\0') 12291556Srgrimes break; 1230211155Sjilles if (enddir == expdir_end) 1231211155Sjilles return; 12321556Srgrimes } 1233147812Sdelphij if (metaflag == 0 || lstat(expdir, &statb) >= 0) 12341556Srgrimes addfname(expdir); 12351556Srgrimes return; 12361556Srgrimes } 12371556Srgrimes endname = p; 12381556Srgrimes if (start != name) { 12391556Srgrimes p = name; 12401556Srgrimes while (p < start) { 124138887Stegge while (*p == CTLQUOTEMARK) 124238887Stegge p++; 12431556Srgrimes if (*p == CTLESC) 12441556Srgrimes p++; 12451556Srgrimes *enddir++ = *p++; 1246211155Sjilles if (enddir == expdir_end) 1247211155Sjilles return; 12481556Srgrimes } 12491556Srgrimes } 12501556Srgrimes if (enddir == expdir) { 12511556Srgrimes p = "."; 12521556Srgrimes } else if (enddir == expdir + 1 && *expdir == '/') { 12531556Srgrimes p = "/"; 12541556Srgrimes } else { 12551556Srgrimes p = expdir; 12561556Srgrimes enddir[-1] = '\0'; 12571556Srgrimes } 12581556Srgrimes if ((dirp = opendir(p)) == NULL) 12591556Srgrimes return; 12601556Srgrimes if (enddir != expdir) 12611556Srgrimes enddir[-1] = '/'; 12621556Srgrimes if (*endname == 0) { 12631556Srgrimes atend = 1; 12641556Srgrimes } else { 12651556Srgrimes atend = 0; 1266207944Sjilles *endname = '\0'; 1267207944Sjilles endname += esc + 1; 12681556Srgrimes } 12691556Srgrimes matchdot = 0; 127038887Stegge p = start; 127138887Stegge while (*p == CTLQUOTEMARK) 127238887Stegge p++; 127338887Stegge if (*p == CTLESC) 127438887Stegge p++; 127538887Stegge if (*p == '.') 12761556Srgrimes matchdot++; 12771556Srgrimes while (! int_pending() && (dp = readdir(dirp)) != NULL) { 12781556Srgrimes if (dp->d_name[0] == '.' && ! matchdot) 12791556Srgrimes continue; 128045514Stegge if (patmatch(start, dp->d_name, 0)) { 1281211155Sjilles if (enddir + dp->d_namlen + 1 > expdir_end) 1282211155Sjilles continue; 1283211155Sjilles memcpy(enddir, dp->d_name, dp->d_namlen + 1); 1284211155Sjilles if (atend) 12851556Srgrimes addfname(expdir); 1286211155Sjilles else { 1287211155Sjilles if (enddir + dp->d_namlen + 2 > expdir_end) 128817987Speter continue; 1289211155Sjilles enddir[dp->d_namlen] = '/'; 1290211155Sjilles enddir[dp->d_namlen + 1] = '\0'; 1291211155Sjilles expmeta(enddir + dp->d_namlen + 1, endname); 12921556Srgrimes } 12931556Srgrimes } 12941556Srgrimes } 12951556Srgrimes closedir(dirp); 12961556Srgrimes if (! atend) 1297207944Sjilles endname[-esc - 1] = esc ? CTLESC : '/'; 12981556Srgrimes} 12991556Srgrimes 13001556Srgrimes 13011556Srgrimes/* 13021556Srgrimes * Add a file name to the list. 13031556Srgrimes */ 13041556Srgrimes 1305213811Sobrienstatic void 130690111Simpaddfname(char *name) 130790111Simp{ 13081556Srgrimes char *p; 13091556Srgrimes struct strlist *sp; 13101556Srgrimes 13111556Srgrimes p = stalloc(strlen(name) + 1); 13121556Srgrimes scopy(name, p); 13131556Srgrimes sp = (struct strlist *)stalloc(sizeof *sp); 13141556Srgrimes sp->text = p; 13151556Srgrimes *exparg.lastp = sp; 13161556Srgrimes exparg.lastp = &sp->next; 13171556Srgrimes} 13181556Srgrimes 13191556Srgrimes 13201556Srgrimes/* 13211556Srgrimes * Sort the results of file name expansion. It calculates the number of 13221556Srgrimes * strings to sort and then calls msort (short for merge sort) to do the 13231556Srgrimes * work. 13241556Srgrimes */ 13251556Srgrimes 1326213811Sobrienstatic struct strlist * 132790111Simpexpsort(struct strlist *str) 132890111Simp{ 13291556Srgrimes int len; 13301556Srgrimes struct strlist *sp; 13311556Srgrimes 13321556Srgrimes len = 0; 13331556Srgrimes for (sp = str ; sp ; sp = sp->next) 13341556Srgrimes len++; 13351556Srgrimes return msort(str, len); 13361556Srgrimes} 13371556Srgrimes 13381556Srgrimes 1339213811Sobrienstatic struct strlist * 134090111Simpmsort(struct strlist *list, int len) 134117987Speter{ 134217987Speter struct strlist *p, *q = NULL; 13431556Srgrimes struct strlist **lpp; 13441556Srgrimes int half; 13451556Srgrimes int n; 13461556Srgrimes 13471556Srgrimes if (len <= 1) 13481556Srgrimes return list; 13498855Srgrimes half = len >> 1; 13501556Srgrimes p = list; 13511556Srgrimes for (n = half ; --n >= 0 ; ) { 13521556Srgrimes q = p; 13531556Srgrimes p = p->next; 13541556Srgrimes } 13551556Srgrimes q->next = NULL; /* terminate first half of list */ 13561556Srgrimes q = msort(list, half); /* sort first half of list */ 13571556Srgrimes p = msort(p, len - half); /* sort second half */ 13581556Srgrimes lpp = &list; 13591556Srgrimes for (;;) { 13601556Srgrimes if (strcmp(p->text, q->text) < 0) { 13611556Srgrimes *lpp = p; 13621556Srgrimes lpp = &p->next; 13631556Srgrimes if ((p = *lpp) == NULL) { 13641556Srgrimes *lpp = q; 13651556Srgrimes break; 13661556Srgrimes } 13671556Srgrimes } else { 13681556Srgrimes *lpp = q; 13691556Srgrimes lpp = &q->next; 13701556Srgrimes if ((q = *lpp) == NULL) { 13711556Srgrimes *lpp = p; 13721556Srgrimes break; 13731556Srgrimes } 13741556Srgrimes } 13751556Srgrimes } 13761556Srgrimes return list; 13771556Srgrimes} 13781556Srgrimes 13791556Srgrimes 13801556Srgrimes 1381221646Sjillesstatic wchar_t 1382221646Sjillesget_wc(const char **p) 1383221646Sjilles{ 1384221646Sjilles wchar_t c; 1385221646Sjilles int chrlen; 1386221646Sjilles 1387221646Sjilles chrlen = mbtowc(&c, *p, 4); 1388221646Sjilles if (chrlen == 0) 1389221646Sjilles return 0; 1390221646Sjilles else if (chrlen == -1) 1391221646Sjilles c = 0; 1392221646Sjilles else 1393221646Sjilles *p += chrlen; 1394221646Sjilles return c; 1395221646Sjilles} 1396221646Sjilles 1397221646Sjilles 13981556Srgrimes/* 13991556Srgrimes * Returns true if the pattern matches the string. 14001556Srgrimes */ 14011556Srgrimes 14021556Srgrimesint 1403200956Sjillespatmatch(const char *pattern, const char *string, int squoted) 140490111Simp{ 1405200956Sjilles const char *p, *q; 140625233Ssteve char c; 1407221646Sjilles wchar_t wc, wc2; 14081556Srgrimes 14091556Srgrimes p = pattern; 14101556Srgrimes q = string; 14111556Srgrimes for (;;) { 14121556Srgrimes switch (c = *p++) { 14131556Srgrimes case '\0': 14141556Srgrimes goto breakloop; 14151556Srgrimes case CTLESC: 141645514Stegge if (squoted && *q == CTLESC) 141745514Stegge q++; 14181556Srgrimes if (*q++ != *p++) 14191556Srgrimes return 0; 14201556Srgrimes break; 142138887Stegge case CTLQUOTEMARK: 142238887Stegge continue; 14231556Srgrimes case '?': 142445514Stegge if (squoted && *q == CTLESC) 142545514Stegge q++; 1426221646Sjilles if (localeisutf8) 1427221646Sjilles wc = get_wc(&q); 1428221646Sjilles else 1429221646Sjilles wc = *q++; 1430221646Sjilles if (wc == '\0') 14311556Srgrimes return 0; 14321556Srgrimes break; 14331556Srgrimes case '*': 14341556Srgrimes c = *p; 143538887Stegge while (c == CTLQUOTEMARK || c == '*') 143638887Stegge c = *++p; 143738887Stegge if (c != CTLESC && c != CTLQUOTEMARK && 143838887Stegge c != '?' && c != '*' && c != '[') { 14391556Srgrimes while (*q != c) { 144045514Stegge if (squoted && *q == CTLESC && 144145514Stegge q[1] == c) 144245514Stegge break; 14431556Srgrimes if (*q == '\0') 14441556Srgrimes return 0; 144545514Stegge if (squoted && *q == CTLESC) 144645514Stegge q++; 14471556Srgrimes q++; 14481556Srgrimes } 14491556Srgrimes } 14501556Srgrimes do { 1451211646Sjilles if (patmatch(p, q, squoted)) 14521556Srgrimes return 1; 145345514Stegge if (squoted && *q == CTLESC) 145445514Stegge q++; 14551556Srgrimes } while (*q++ != '\0'); 14561556Srgrimes return 0; 14571556Srgrimes case '[': { 1458200956Sjilles const char *endp; 14591556Srgrimes int invert, found; 1460221646Sjilles wchar_t chr; 14611556Srgrimes 14621556Srgrimes endp = p; 146326488Sache if (*endp == '!' || *endp == '^') 14641556Srgrimes endp++; 14651556Srgrimes for (;;) { 146638887Stegge while (*endp == CTLQUOTEMARK) 146738887Stegge endp++; 14681556Srgrimes if (*endp == '\0') 14691556Srgrimes goto dft; /* no matching ] */ 14701556Srgrimes if (*endp == CTLESC) 14711556Srgrimes endp++; 14721556Srgrimes if (*++endp == ']') 14731556Srgrimes break; 14741556Srgrimes } 14751556Srgrimes invert = 0; 147626488Sache if (*p == '!' || *p == '^') { 14771556Srgrimes invert++; 14781556Srgrimes p++; 14791556Srgrimes } 14801556Srgrimes found = 0; 1481221646Sjilles if (squoted && *q == CTLESC) 1482221646Sjilles q++; 1483221646Sjilles if (localeisutf8) 1484221646Sjilles chr = get_wc(&q); 1485221646Sjilles else 148645514Stegge chr = *q++; 148717987Speter if (chr == '\0') 148817987Speter return 0; 14891556Srgrimes c = *p++; 14901556Srgrimes do { 149138887Stegge if (c == CTLQUOTEMARK) 149238887Stegge continue; 14931556Srgrimes if (c == CTLESC) 14941556Srgrimes c = *p++; 1495221646Sjilles if (localeisutf8 && c & 0x80) { 1496221646Sjilles p--; 1497221646Sjilles wc = get_wc(&p); 1498221646Sjilles if (wc == 0) /* bad utf-8 */ 1499221646Sjilles return 0; 1500221646Sjilles } else 1501221646Sjilles wc = c; 15021556Srgrimes if (*p == '-' && p[1] != ']') { 15031556Srgrimes p++; 150438887Stegge while (*p == CTLQUOTEMARK) 150538887Stegge p++; 15061556Srgrimes if (*p == CTLESC) 15071556Srgrimes p++; 1508221646Sjilles if (localeisutf8) { 1509221646Sjilles wc2 = get_wc(&p); 1510221646Sjilles if (wc2 == 0) /* bad utf-8 */ 1511221646Sjilles return 0; 1512221646Sjilles } else 1513221646Sjilles wc2 = *p++; 1514221646Sjilles if ( collate_range_cmp(chr, wc) >= 0 1515221646Sjilles && collate_range_cmp(chr, wc2) <= 0 151617525Sache ) 15171556Srgrimes found = 1; 15181556Srgrimes } else { 1519221646Sjilles if (chr == wc) 15201556Srgrimes found = 1; 15211556Srgrimes } 15221556Srgrimes } while ((c = *p++) != ']'); 15231556Srgrimes if (found == invert) 15241556Srgrimes return 0; 15251556Srgrimes break; 15261556Srgrimes } 15271556Srgrimesdft: default: 152845514Stegge if (squoted && *q == CTLESC) 152945514Stegge q++; 15301556Srgrimes if (*q++ != c) 15311556Srgrimes return 0; 15321556Srgrimes break; 15331556Srgrimes } 15341556Srgrimes } 15351556Srgrimesbreakloop: 15361556Srgrimes if (*q != '\0') 15371556Srgrimes return 0; 15381556Srgrimes return 1; 15391556Srgrimes} 15401556Srgrimes 15411556Srgrimes 15421556Srgrimes 15431556Srgrimes/* 1544212243Sjilles * Remove any CTLESC and CTLQUOTEMARK characters from a string. 15451556Srgrimes */ 15461556Srgrimes 15471556Srgrimesvoid 154890111Simprmescapes(char *str) 154938887Stegge{ 155025233Ssteve char *p, *q; 15511556Srgrimes 15521556Srgrimes p = str; 1553214512Sjilles while (*p != CTLESC && *p != CTLQUOTEMARK && *p != CTLQUOTEEND) { 15541556Srgrimes if (*p++ == '\0') 15551556Srgrimes return; 15561556Srgrimes } 15571556Srgrimes q = p; 15581556Srgrimes while (*p) { 1559214512Sjilles if (*p == CTLQUOTEMARK || *p == CTLQUOTEEND) { 156038887Stegge p++; 156138887Stegge continue; 156238887Stegge } 15631556Srgrimes if (*p == CTLESC) 15641556Srgrimes p++; 15651556Srgrimes *q++ = *p++; 15661556Srgrimes } 15671556Srgrimes *q = '\0'; 15681556Srgrimes} 15691556Srgrimes 15701556Srgrimes 15711556Srgrimes 15721556Srgrimes/* 15731556Srgrimes * See if a pattern matches in a case statement. 15741556Srgrimes */ 15751556Srgrimes 15761556Srgrimesint 1577200956Sjillescasematch(union node *pattern, const char *val) 157890111Simp{ 15791556Srgrimes struct stackmark smark; 15801556Srgrimes int result; 15811556Srgrimes char *p; 15821556Srgrimes 15831556Srgrimes setstackmark(&smark); 15841556Srgrimes argbackq = pattern->narg.backquote; 15851556Srgrimes STARTSTACKSTR(expdest); 15861556Srgrimes ifslastp = NULL; 15871556Srgrimes argstr(pattern->narg.text, EXP_TILDE | EXP_CASE); 15881556Srgrimes STPUTC('\0', expdest); 15891556Srgrimes p = grabstackstr(expdest); 159045514Stegge result = patmatch(p, val, 0); 15911556Srgrimes popstackmark(&smark); 15921556Srgrimes return result; 15931556Srgrimes} 159417987Speter 159517987Speter/* 159617987Speter * Our own itoa(). 159717987Speter */ 159817987Speter 1599213811Sobrienstatic char * 160090111Simpcvtnum(int num, char *buf) 160190111Simp{ 160217987Speter char temp[32]; 160317987Speter int neg = num < 0; 160417987Speter char *p = temp + 31; 160517987Speter 160617987Speter temp[31] = '\0'; 160717987Speter 160817987Speter do { 160917987Speter *--p = num % 10 + '0'; 161017987Speter } while ((num /= 10) != 0); 161117987Speter 161217987Speter if (neg) 161317987Speter *--p = '-'; 161417987Speter 1615215783Sjilles STPUTS(p, buf); 161617987Speter return buf; 161717987Speter} 1618108286Stjr 1619108286Stjr/* 1620216778Sjilles * Check statically if expanding a string may have side effects. 1621216778Sjilles */ 1622216778Sjillesint 1623216778Sjillesexpandhassideeffects(const char *p) 1624216778Sjilles{ 1625216778Sjilles int c; 1626216778Sjilles int arinest; 1627216778Sjilles 1628216778Sjilles arinest = 0; 1629216778Sjilles while ((c = *p++) != '\0') { 1630216778Sjilles switch (c) { 1631216778Sjilles case CTLESC: 1632216778Sjilles p++; 1633216778Sjilles break; 1634216778Sjilles case CTLVAR: 1635216778Sjilles c = *p++; 1636216778Sjilles /* Expanding $! sets the job to remembered. */ 1637216778Sjilles if (*p == '!') 1638216778Sjilles return 1; 1639216778Sjilles if ((c & VSTYPE) == VSASSIGN) 1640216778Sjilles return 1; 1641216778Sjilles /* 1642216778Sjilles * If we are in arithmetic, the parameter may contain 1643216778Sjilles * '=' which may cause side effects. Exceptions are 1644216778Sjilles * the length of a parameter and $$, $# and $? which 1645216778Sjilles * are always numeric. 1646216778Sjilles */ 1647216778Sjilles if ((c & VSTYPE) == VSLENGTH) { 1648216778Sjilles while (*p != '=') 1649216778Sjilles p++; 1650216778Sjilles p++; 1651216778Sjilles break; 1652216778Sjilles } 1653216778Sjilles if ((*p == '$' || *p == '#' || *p == '?') && 1654216778Sjilles p[1] == '=') { 1655216778Sjilles p += 2; 1656216778Sjilles break; 1657216778Sjilles } 1658216778Sjilles if (arinest > 0) 1659216778Sjilles return 1; 1660216778Sjilles break; 1661216778Sjilles case CTLBACKQ: 1662216778Sjilles case CTLBACKQ | CTLQUOTE: 1663216778Sjilles if (arinest > 0) 1664216778Sjilles return 1; 1665216778Sjilles break; 1666216778Sjilles case CTLARI: 1667216778Sjilles arinest++; 1668216778Sjilles break; 1669216778Sjilles case CTLENDARI: 1670216778Sjilles arinest--; 1671216778Sjilles break; 1672216778Sjilles case '=': 1673216778Sjilles if (*p == '=') { 1674216778Sjilles /* Allow '==' operator. */ 1675216778Sjilles p++; 1676216778Sjilles continue; 1677216778Sjilles } 1678216778Sjilles if (arinest > 0) 1679216778Sjilles return 1; 1680216778Sjilles break; 1681216778Sjilles case '!': case '<': case '>': 1682216778Sjilles /* Allow '!=', '<=', '>=' operators. */ 1683216778Sjilles if (*p == '=') 1684216778Sjilles p++; 1685216778Sjilles break; 1686216778Sjilles } 1687216778Sjilles } 1688216778Sjilles return 0; 1689216778Sjilles} 1690216778Sjilles 1691216778Sjilles/* 1692108286Stjr * Do most of the work for wordexp(3). 1693108286Stjr */ 1694108286Stjr 1695108286Stjrint 1696108286Stjrwordexpcmd(int argc, char **argv) 1697108286Stjr{ 1698108286Stjr size_t len; 1699108286Stjr int i; 1700108286Stjr 1701108286Stjr out1fmt("%08x", argc - 1); 1702108286Stjr for (i = 1, len = 0; i < argc; i++) 1703108286Stjr len += strlen(argv[i]); 1704108286Stjr out1fmt("%08x", (int)len); 1705215567Sjilles for (i = 1; i < argc; i++) 1706215567Sjilles outbin(argv[i], strlen(argv[i]) + 1, out1); 1707108286Stjr return (0); 1708108286Stjr} 1709