expand.c revision 155301
11556Srgrimes/*- 21556Srgrimes * Copyright (c) 1991, 1993 31556Srgrimes * The Regents of the University of California. All rights reserved. 41556Srgrimes * 51556Srgrimes * This code is derived from software contributed to Berkeley by 61556Srgrimes * Kenneth Almquist. 71556Srgrimes * 81556Srgrimes * Redistribution and use in source and binary forms, with or without 91556Srgrimes * modification, are permitted provided that the following conditions 101556Srgrimes * are met: 111556Srgrimes * 1. Redistributions of source code must retain the above copyright 121556Srgrimes * notice, this list of conditions and the following disclaimer. 131556Srgrimes * 2. Redistributions in binary form must reproduce the above copyright 141556Srgrimes * notice, this list of conditions and the following disclaimer in the 151556Srgrimes * documentation and/or other materials provided with the distribution. 161556Srgrimes * 4. Neither the name of the University nor the names of its contributors 171556Srgrimes * may be used to endorse or promote products derived from this software 181556Srgrimes * without specific prior written permission. 191556Srgrimes * 201556Srgrimes * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 211556Srgrimes * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 221556Srgrimes * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 231556Srgrimes * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 241556Srgrimes * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 251556Srgrimes * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 261556Srgrimes * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 271556Srgrimes * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 281556Srgrimes * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 291556Srgrimes * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 301556Srgrimes * SUCH DAMAGE. 311556Srgrimes */ 321556Srgrimes 331556Srgrimes#ifndef lint 3436150Scharnier#if 0 3536150Scharnierstatic char sccsid[] = "@(#)expand.c 8.5 (Berkeley) 5/15/95"; 3636150Scharnier#endif 371556Srgrimes#endif /* not lint */ 3899110Sobrien#include <sys/cdefs.h> 3999110Sobrien__FBSDID("$FreeBSD: head/bin/sh/expand.c 155301 2006-02-04 14:37:50Z schweikh $"); 401556Srgrimes 4117987Speter#include <sys/types.h> 4217987Speter#include <sys/time.h> 4317987Speter#include <sys/stat.h> 4417987Speter#include <errno.h> 4517987Speter#include <dirent.h> 4617987Speter#include <unistd.h> 4717987Speter#include <pwd.h> 4817987Speter#include <stdlib.h> 4919281Sache#include <limits.h> 5038887Stegge#include <stdio.h> 51108286Stjr#include <string.h> 5217987Speter 531556Srgrimes/* 541556Srgrimes * Routines to expand arguments to commands. We have to deal with 551556Srgrimes * backquotes, shell variables, and file metacharacters. 561556Srgrimes */ 571556Srgrimes 581556Srgrimes#include "shell.h" 591556Srgrimes#include "main.h" 601556Srgrimes#include "nodes.h" 611556Srgrimes#include "eval.h" 621556Srgrimes#include "expand.h" 631556Srgrimes#include "syntax.h" 641556Srgrimes#include "parser.h" 651556Srgrimes#include "jobs.h" 661556Srgrimes#include "options.h" 671556Srgrimes#include "var.h" 681556Srgrimes#include "input.h" 691556Srgrimes#include "output.h" 701556Srgrimes#include "memalloc.h" 711556Srgrimes#include "error.h" 721556Srgrimes#include "mystring.h" 7317987Speter#include "arith.h" 7417987Speter#include "show.h" 751556Srgrimes 761556Srgrimes/* 771556Srgrimes * Structure specifying which parts of the string should be searched 781556Srgrimes * for IFS characters. 791556Srgrimes */ 801556Srgrimes 811556Srgrimesstruct ifsregion { 821556Srgrimes struct ifsregion *next; /* next region in list */ 831556Srgrimes int begoff; /* offset of start of region */ 841556Srgrimes int endoff; /* offset of end of region */ 851556Srgrimes int nulonly; /* search for nul bytes only */ 861556Srgrimes}; 871556Srgrimes 881556Srgrimes 89117261SddsSTATIC char *expdest; /* output of current string */ 90117261SddsSTATIC struct nodelist *argbackq; /* list of back quote expressions */ 91117261SddsSTATIC struct ifsregion ifsfirst; /* first struct in list of ifs regions */ 92117261SddsSTATIC struct ifsregion *ifslastp; /* last struct in list */ 93117261SddsSTATIC struct arglist exparg; /* holds expanded arg list */ 941556Srgrimes 9590111SimpSTATIC void argstr(char *, int); 9690111SimpSTATIC char *exptilde(char *, int); 9790111SimpSTATIC void expbackq(union node *, int, int); 9890111SimpSTATIC int subevalvar(char *, char *, int, int, int, int); 9990111SimpSTATIC char *evalvar(char *, int); 10090111SimpSTATIC int varisset(char *, int); 10190111SimpSTATIC void varvalue(char *, int, int); 10290111SimpSTATIC void recordregion(int, int, int); 103155301SschweikhSTATIC void removerecordregions(int); 10490111SimpSTATIC void ifsbreakup(char *, struct arglist *); 10590111SimpSTATIC void expandmeta(struct strlist *, int); 10690111SimpSTATIC void expmeta(char *, char *); 10790111SimpSTATIC void addfname(char *); 10890111SimpSTATIC struct strlist *expsort(struct strlist *); 10990111SimpSTATIC struct strlist *msort(struct strlist *, int); 11090111SimpSTATIC int pmatch(char *, char *, int); 11190111SimpSTATIC char *cvtnum(int, char *); 11290111SimpSTATIC int collate_range_cmp(int, int); 1131556Srgrimes 11490111SimpSTATIC int 115118374Sachecollate_range_cmp(int c1, int c2) 11619281Sache{ 11719281Sache static char s1[2], s2[2]; 11819281Sache 11919281Sache s1[0] = c1; 12019281Sache s2[0] = c2; 121118374Sache return (strcoll(s1, s2)); 12219281Sache} 12319281Sache 1241556Srgrimes/* 1251556Srgrimes * Expand shell variables and backquotes inside a here document. 12690111Simp * union node *arg the document 12790111Simp * int fd; where to write the expanded version 1281556Srgrimes */ 1291556Srgrimes 1301556Srgrimesvoid 13190111Simpexpandhere(union node *arg, int fd) 13290111Simp{ 1331556Srgrimes herefd = fd; 1341556Srgrimes expandarg(arg, (struct arglist *)NULL, 0); 13539137Stegge xwrite(fd, stackblock(), expdest - stackblock()); 1361556Srgrimes} 1371556Srgrimes 1381556Srgrimes 1391556Srgrimes/* 1401556Srgrimes * Perform variable substitution and command substitution on an argument, 1411556Srgrimes * placing the resulting list of arguments in arglist. If EXP_FULL is true, 1421556Srgrimes * perform splitting and file name expansion. When arglist is NULL, perform 1431556Srgrimes * here document expansion. 1441556Srgrimes */ 1451556Srgrimes 1461556Srgrimesvoid 14790111Simpexpandarg(union node *arg, struct arglist *arglist, int flag) 14817987Speter{ 1491556Srgrimes struct strlist *sp; 1501556Srgrimes char *p; 1511556Srgrimes 1521556Srgrimes argbackq = arg->narg.backquote; 1531556Srgrimes STARTSTACKSTR(expdest); 1541556Srgrimes ifsfirst.next = NULL; 1551556Srgrimes ifslastp = NULL; 1561556Srgrimes argstr(arg->narg.text, flag); 1571556Srgrimes if (arglist == NULL) { 1581556Srgrimes return; /* here document expanded */ 1591556Srgrimes } 1601556Srgrimes STPUTC('\0', expdest); 1611556Srgrimes p = grabstackstr(expdest); 1621556Srgrimes exparg.lastp = &exparg.list; 1631556Srgrimes /* 1641556Srgrimes * TODO - EXP_REDIR 1651556Srgrimes */ 1661556Srgrimes if (flag & EXP_FULL) { 1671556Srgrimes ifsbreakup(p, &exparg); 1681556Srgrimes *exparg.lastp = NULL; 1691556Srgrimes exparg.lastp = &exparg.list; 1701556Srgrimes expandmeta(exparg.list, flag); 1711556Srgrimes } else { 1721556Srgrimes if (flag & EXP_REDIR) /*XXX - for now, just remove escapes */ 1731556Srgrimes rmescapes(p); 1741556Srgrimes sp = (struct strlist *)stalloc(sizeof (struct strlist)); 1751556Srgrimes sp->text = p; 1761556Srgrimes *exparg.lastp = sp; 1771556Srgrimes exparg.lastp = &sp->next; 1781556Srgrimes } 1791556Srgrimes while (ifsfirst.next != NULL) { 1801556Srgrimes struct ifsregion *ifsp; 1811556Srgrimes INTOFF; 1821556Srgrimes ifsp = ifsfirst.next->next; 1831556Srgrimes ckfree(ifsfirst.next); 1841556Srgrimes ifsfirst.next = ifsp; 1851556Srgrimes INTON; 1861556Srgrimes } 1871556Srgrimes *exparg.lastp = NULL; 1881556Srgrimes if (exparg.list) { 1891556Srgrimes *arglist->lastp = exparg.list; 1901556Srgrimes arglist->lastp = exparg.lastp; 1911556Srgrimes } 1921556Srgrimes} 1931556Srgrimes 1941556Srgrimes 1951556Srgrimes 1961556Srgrimes/* 1971556Srgrimes * Perform variable and command substitution. If EXP_FULL is set, output CTLESC 1981556Srgrimes * characters to allow for further processing. Otherwise treat 1991556Srgrimes * $@ like $* since no splitting will be performed. 2001556Srgrimes */ 2011556Srgrimes 2021556SrgrimesSTATIC void 20390111Simpargstr(char *p, int flag) 20417987Speter{ 20525233Ssteve char c; 206104672Stjr int quotes = flag & (EXP_FULL | EXP_CASE | EXP_REDIR); /* do CTLESC */ 2071556Srgrimes int firsteq = 1; 2081556Srgrimes 2091556Srgrimes if (*p == '~' && (flag & (EXP_TILDE | EXP_VARTILDE))) 2101556Srgrimes p = exptilde(p, flag); 2111556Srgrimes for (;;) { 2121556Srgrimes switch (c = *p++) { 2131556Srgrimes case '\0': 2141556Srgrimes case CTLENDVAR: /* ??? */ 2151556Srgrimes goto breakloop; 21638887Stegge case CTLQUOTEMARK: 21738887Stegge /* "$@" syntax adherence hack */ 21838887Stegge if (p[0] == CTLVAR && p[2] == '@' && p[3] == '=') 21938887Stegge break; 22039137Stegge if ((flag & EXP_FULL) != 0) 22139137Stegge STPUTC(c, expdest); 22238887Stegge break; 2231556Srgrimes case CTLESC: 2241556Srgrimes if (quotes) 2251556Srgrimes STPUTC(c, expdest); 2261556Srgrimes c = *p++; 2271556Srgrimes STPUTC(c, expdest); 2281556Srgrimes break; 2291556Srgrimes case CTLVAR: 2301556Srgrimes p = evalvar(p, flag); 2311556Srgrimes break; 2321556Srgrimes case CTLBACKQ: 2331556Srgrimes case CTLBACKQ|CTLQUOTE: 2341556Srgrimes expbackq(argbackq->n, c & CTLQUOTE, flag); 2351556Srgrimes argbackq = argbackq->next; 2361556Srgrimes break; 2371556Srgrimes case CTLENDARI: 2381556Srgrimes expari(flag); 2391556Srgrimes break; 2401556Srgrimes case ':': 2411556Srgrimes case '=': 2421556Srgrimes /* 2431556Srgrimes * sort of a hack - expand tildes in variable 2441556Srgrimes * assignments (after the first '=' and after ':'s). 2451556Srgrimes */ 2461556Srgrimes STPUTC(c, expdest); 2471556Srgrimes if (flag & EXP_VARTILDE && *p == '~') { 2481556Srgrimes if (c == '=') { 2491556Srgrimes if (firsteq) 2501556Srgrimes firsteq = 0; 2511556Srgrimes else 2521556Srgrimes break; 2531556Srgrimes } 2541556Srgrimes p = exptilde(p, flag); 2551556Srgrimes } 2561556Srgrimes break; 2571556Srgrimes default: 2581556Srgrimes STPUTC(c, expdest); 2591556Srgrimes } 2601556Srgrimes } 2611556Srgrimesbreakloop:; 2621556Srgrimes} 2631556Srgrimes 2641556SrgrimesSTATIC char * 26590111Simpexptilde(char *p, int flag) 26617987Speter{ 2671556Srgrimes char c, *startp = p; 2681556Srgrimes struct passwd *pw; 2691556Srgrimes char *home; 270108935Stjr int quotes = flag & (EXP_FULL | EXP_CASE | EXP_REDIR); 2711556Srgrimes 27217987Speter while ((c = *p) != '\0') { 2731556Srgrimes switch(c) { 2741556Srgrimes case CTLESC: 2751556Srgrimes return (startp); 27639137Stegge case CTLQUOTEMARK: 27739137Stegge return (startp); 2781556Srgrimes case ':': 2791556Srgrimes if (flag & EXP_VARTILDE) 2801556Srgrimes goto done; 2811556Srgrimes break; 2821556Srgrimes case '/': 2831556Srgrimes goto done; 2841556Srgrimes } 2851556Srgrimes p++; 2861556Srgrimes } 2871556Srgrimesdone: 2881556Srgrimes *p = '\0'; 2891556Srgrimes if (*(startp+1) == '\0') { 2901556Srgrimes if ((home = lookupvar("HOME")) == NULL) 2911556Srgrimes goto lose; 2921556Srgrimes } else { 2931556Srgrimes if ((pw = getpwnam(startp+1)) == NULL) 2941556Srgrimes goto lose; 2951556Srgrimes home = pw->pw_dir; 2961556Srgrimes } 2971556Srgrimes if (*home == '\0') 2981556Srgrimes goto lose; 2991556Srgrimes *p = c; 30017987Speter while ((c = *home++) != '\0') { 30183675Stegge if (quotes && SQSYNTAX[(int)c] == CCTL) 3021556Srgrimes STPUTC(CTLESC, expdest); 3031556Srgrimes STPUTC(c, expdest); 3041556Srgrimes } 3051556Srgrimes return (p); 3061556Srgrimeslose: 3071556Srgrimes *p = c; 3081556Srgrimes return (startp); 3091556Srgrimes} 3101556Srgrimes 3111556Srgrimes 312155301SschweikhSTATIC void 31390111Simpremoverecordregions(int endoff) 31438887Stegge{ 31538887Stegge if (ifslastp == NULL) 31638887Stegge return; 31738887Stegge 31838887Stegge if (ifsfirst.endoff > endoff) { 31938887Stegge while (ifsfirst.next != NULL) { 32038887Stegge struct ifsregion *ifsp; 32138887Stegge INTOFF; 32238887Stegge ifsp = ifsfirst.next->next; 32338887Stegge ckfree(ifsfirst.next); 32438887Stegge ifsfirst.next = ifsp; 32538887Stegge INTON; 32638887Stegge } 32738887Stegge if (ifsfirst.begoff > endoff) 32838887Stegge ifslastp = NULL; 32938887Stegge else { 33038887Stegge ifslastp = &ifsfirst; 33138887Stegge ifsfirst.endoff = endoff; 33238887Stegge } 33338887Stegge return; 33438887Stegge } 335155301Sschweikh 33638887Stegge ifslastp = &ifsfirst; 33738887Stegge while (ifslastp->next && ifslastp->next->begoff < endoff) 33838887Stegge ifslastp=ifslastp->next; 33938887Stegge while (ifslastp->next != NULL) { 34038887Stegge struct ifsregion *ifsp; 34138887Stegge INTOFF; 34238887Stegge ifsp = ifslastp->next->next; 34338887Stegge ckfree(ifslastp->next); 34438887Stegge ifslastp->next = ifsp; 34538887Stegge INTON; 34638887Stegge } 34738887Stegge if (ifslastp->endoff > endoff) 34838887Stegge ifslastp->endoff = endoff; 34938887Stegge} 35038887Stegge 3511556Srgrimes/* 3521556Srgrimes * Expand arithmetic expression. Backup to start of expression, 3531556Srgrimes * evaluate, place result in (backed up) result, adjust string position. 3541556Srgrimes */ 3551556Srgrimesvoid 35690111Simpexpari(int flag) 35717987Speter{ 3581556Srgrimes char *p, *start; 3591556Srgrimes int result; 36038887Stegge int begoff; 361108935Stjr int quotes = flag & (EXP_FULL | EXP_CASE | EXP_REDIR); 36238887Stegge int quoted; 3631556Srgrimes 36425233Ssteve 3651556Srgrimes /* 36646684Skris * This routine is slightly over-complicated for 3671556Srgrimes * efficiency. First we make sure there is 3681556Srgrimes * enough space for the result, which may be bigger 36946684Skris * than the expression if we add exponentiation. Next we 3701556Srgrimes * scan backwards looking for the start of arithmetic. If the 3711556Srgrimes * next previous character is a CTLESC character, then we 3721556Srgrimes * have to rescan starting from the beginning since CTLESC 3738855Srgrimes * characters have to be processed left to right. 3741556Srgrimes */ 37522777Ssteve#if INT_MAX / 1000000000 >= 10 || INT_MIN / 1000000000 <= -10 37622777Ssteve#error "integers with more than 10 digits are not supported" 37722777Ssteve#endif 37822777Ssteve CHECKSTRSPACE(12 - 2, expdest); 3798855Srgrimes USTPUTC('\0', expdest); 3801556Srgrimes start = stackblock(); 38183676Stegge p = expdest - 2; 38283676Stegge while (p >= start && *p != CTLARI) 3831556Srgrimes --p; 38483676Stegge if (p < start || *p != CTLARI) 3851556Srgrimes error("missing CTLARI (shouldn't happen)"); 38683676Stegge if (p > start && *(p - 1) == CTLESC) 3871556Srgrimes for (p = start; *p != CTLARI; p++) 3881556Srgrimes if (*p == CTLESC) 3891556Srgrimes p++; 39038887Stegge 39138887Stegge if (p[1] == '"') 39238887Stegge quoted=1; 39338887Stegge else 39438887Stegge quoted=0; 39538887Stegge begoff = p - start; 39638887Stegge removerecordregions(begoff); 3971556Srgrimes if (quotes) 39838887Stegge rmescapes(p+2); 39938887Stegge result = arith(p+2); 40022777Ssteve fmtstr(p, 12, "%d", result); 4011556Srgrimes while (*p++) 4021556Srgrimes ; 40338887Stegge if (quoted == 0) 40438887Stegge recordregion(begoff, p - 1 - start, 0); 4051556Srgrimes result = expdest - p + 1; 4061556Srgrimes STADJUST(-result, expdest); 4071556Srgrimes} 4081556Srgrimes 4091556Srgrimes 4101556Srgrimes/* 4111556Srgrimes * Expand stuff in backwards quotes. 4121556Srgrimes */ 4131556Srgrimes 4141556SrgrimesSTATIC void 41590111Simpexpbackq(union node *cmd, int quoted, int flag) 41617987Speter{ 4171556Srgrimes struct backcmd in; 4181556Srgrimes int i; 4191556Srgrimes char buf[128]; 4201556Srgrimes char *p; 4211556Srgrimes char *dest = expdest; 4221556Srgrimes struct ifsregion saveifs, *savelastp; 4231556Srgrimes struct nodelist *saveargbackq; 4241556Srgrimes char lastc; 4251556Srgrimes int startloc = dest - stackblock(); 4261556Srgrimes char const *syntax = quoted? DQSYNTAX : BASESYNTAX; 4271556Srgrimes int saveherefd; 428108935Stjr int quotes = flag & (EXP_FULL | EXP_CASE | EXP_REDIR); 429115424Sfenner int nnl; 4301556Srgrimes 4311556Srgrimes INTOFF; 4321556Srgrimes saveifs = ifsfirst; 4331556Srgrimes savelastp = ifslastp; 4341556Srgrimes saveargbackq = argbackq; 4358855Srgrimes saveherefd = herefd; 4361556Srgrimes herefd = -1; 4371556Srgrimes p = grabstackstr(dest); 4381556Srgrimes evalbackcmd(cmd, &in); 4391556Srgrimes ungrabstackstr(p, dest); 4401556Srgrimes ifsfirst = saveifs; 4411556Srgrimes ifslastp = savelastp; 4421556Srgrimes argbackq = saveargbackq; 4431556Srgrimes herefd = saveherefd; 4441556Srgrimes 4451556Srgrimes p = in.buf; 4461556Srgrimes lastc = '\0'; 447115424Sfenner nnl = 0; 448115424Sfenner /* Don't copy trailing newlines */ 4491556Srgrimes for (;;) { 4501556Srgrimes if (--in.nleft < 0) { 4511556Srgrimes if (in.fd < 0) 4521556Srgrimes break; 4531556Srgrimes while ((i = read(in.fd, buf, sizeof buf)) < 0 && errno == EINTR); 4541556Srgrimes TRACE(("expbackq: read returns %d\n", i)); 4551556Srgrimes if (i <= 0) 4561556Srgrimes break; 4571556Srgrimes p = buf; 4581556Srgrimes in.nleft = i - 1; 4591556Srgrimes } 4601556Srgrimes lastc = *p++; 4611556Srgrimes if (lastc != '\0') { 46283675Stegge if (quotes && syntax[(int)lastc] == CCTL) 4631556Srgrimes STPUTC(CTLESC, dest); 464115424Sfenner if (lastc == '\n') { 465115424Sfenner nnl++; 466115424Sfenner } else { 467115424Sfenner while (nnl > 0) { 468115424Sfenner nnl--; 469115424Sfenner STPUTC('\n', dest); 470115424Sfenner } 471115424Sfenner STPUTC(lastc, dest); 472115424Sfenner } 4731556Srgrimes } 4741556Srgrimes } 47517987Speter 4761556Srgrimes if (in.fd >= 0) 4771556Srgrimes close(in.fd); 4781556Srgrimes if (in.buf) 4791556Srgrimes ckfree(in.buf); 4801556Srgrimes if (in.jp) 48145916Scracauer exitstatus = waitforjob(in.jp, (int *)NULL); 4821556Srgrimes if (quoted == 0) 4831556Srgrimes recordregion(startloc, dest - stackblock(), 0); 4841556Srgrimes TRACE(("evalbackq: size=%d: \"%.*s\"\n", 4851556Srgrimes (dest - stackblock()) - startloc, 4861556Srgrimes (dest - stackblock()) - startloc, 4871556Srgrimes stackblock() + startloc)); 4881556Srgrimes expdest = dest; 4891556Srgrimes INTON; 4901556Srgrimes} 4911556Srgrimes 4921556Srgrimes 4931556Srgrimes 49417987SpeterSTATIC int 49590111Simpsubevalvar(char *p, char *str, int strloc, int subtype, int startloc, 49690111Simp int varflags) 49717987Speter{ 49817987Speter char *startp; 49917987Speter char *loc = NULL; 50045514Stegge char *q; 50117987Speter int c = 0; 50217987Speter int saveherefd = herefd; 50317987Speter struct nodelist *saveargbackq = argbackq; 50420425Ssteve int amount; 50520425Ssteve 50617987Speter herefd = -1; 50717987Speter argstr(p, 0); 50817987Speter STACKSTRNUL(expdest); 50917987Speter herefd = saveherefd; 51017987Speter argbackq = saveargbackq; 51117987Speter startp = stackblock() + startloc; 51220425Ssteve if (str == NULL) 51320425Ssteve str = stackblock() + strloc; 51417987Speter 51517987Speter switch (subtype) { 51617987Speter case VSASSIGN: 51717987Speter setvar(str, startp, 0); 51820425Ssteve amount = startp - expdest; 51920425Ssteve STADJUST(amount, expdest); 52017987Speter varflags &= ~VSNUL; 52117987Speter if (c != 0) 52217987Speter *loc = c; 52317987Speter return 1; 52417987Speter 52517987Speter case VSQUESTION: 52617987Speter if (*p != CTLENDVAR) { 52717987Speter outfmt(&errout, "%s\n", startp); 52817987Speter error((char *)NULL); 52917987Speter } 530112254Sru error("%.*s: parameter %snot set", (int)(p - str - 1), 53117987Speter str, (varflags & VSNUL) ? "null or " 53217987Speter : nullstr); 53317987Speter return 0; 53417987Speter 53517987Speter case VSTRIMLEFT: 53625233Ssteve for (loc = startp; loc < str; loc++) { 53717987Speter c = *loc; 53817987Speter *loc = '\0'; 53945514Stegge if (patmatch(str, startp, varflags & VSQUOTE)) { 54017987Speter *loc = c; 54117987Speter goto recordleft; 54217987Speter } 54317987Speter *loc = c; 54445514Stegge if ((varflags & VSQUOTE) && *loc == CTLESC) 54545514Stegge loc++; 54617987Speter } 54717987Speter return 0; 54817987Speter 54917987Speter case VSTRIMLEFTMAX: 55045514Stegge for (loc = str - 1; loc >= startp;) { 55117987Speter c = *loc; 55217987Speter *loc = '\0'; 55345514Stegge if (patmatch(str, startp, varflags & VSQUOTE)) { 55417987Speter *loc = c; 55517987Speter goto recordleft; 55617987Speter } 55717987Speter *loc = c; 55845514Stegge loc--; 55945514Stegge if ((varflags & VSQUOTE) && loc > startp && 56045514Stegge *(loc - 1) == CTLESC) { 56145514Stegge for (q = startp; q < loc; q++) 56245514Stegge if (*q == CTLESC) 56345514Stegge q++; 56445514Stegge if (q > loc) 56545514Stegge loc--; 56645514Stegge } 56717987Speter } 56817987Speter return 0; 56917987Speter 57017987Speter case VSTRIMRIGHT: 57145514Stegge for (loc = str - 1; loc >= startp;) { 57245514Stegge if (patmatch(str, loc, varflags & VSQUOTE)) { 57320425Ssteve amount = loc - expdest; 57420425Ssteve STADJUST(amount, expdest); 57517987Speter return 1; 57617987Speter } 57745514Stegge loc--; 57845514Stegge if ((varflags & VSQUOTE) && loc > startp && 579155301Sschweikh *(loc - 1) == CTLESC) { 58045514Stegge for (q = startp; q < loc; q++) 58145514Stegge if (*q == CTLESC) 58245514Stegge q++; 58345514Stegge if (q > loc) 58445514Stegge loc--; 58545514Stegge } 58617987Speter } 58717987Speter return 0; 58817987Speter 58917987Speter case VSTRIMRIGHTMAX: 59017987Speter for (loc = startp; loc < str - 1; loc++) { 59145514Stegge if (patmatch(str, loc, varflags & VSQUOTE)) { 59220425Ssteve amount = loc - expdest; 59320425Ssteve STADJUST(amount, expdest); 59417987Speter return 1; 59517987Speter } 59645514Stegge if ((varflags & VSQUOTE) && *loc == CTLESC) 59745514Stegge loc++; 59817987Speter } 59917987Speter return 0; 60017987Speter 60117987Speter 60217987Speter default: 60317987Speter abort(); 60417987Speter } 60517987Speter 60617987Speterrecordleft: 60720425Ssteve amount = ((str - 1) - (loc - startp)) - expdest; 60820425Ssteve STADJUST(amount, expdest); 60917987Speter while (loc != str - 1) 61017987Speter *startp++ = *loc++; 61117987Speter return 1; 61217987Speter} 61317987Speter 61417987Speter 6151556Srgrimes/* 6161556Srgrimes * Expand a variable, and return a pointer to the next character in the 6171556Srgrimes * input string. 6181556Srgrimes */ 6191556Srgrimes 6201556SrgrimesSTATIC char * 62190111Simpevalvar(char *p, int flag) 62217987Speter{ 6231556Srgrimes int subtype; 6241556Srgrimes int varflags; 6251556Srgrimes char *var; 6261556Srgrimes char *val; 62745644Stegge int patloc; 6281556Srgrimes int c; 6291556Srgrimes int set; 6301556Srgrimes int special; 6311556Srgrimes int startloc; 63217987Speter int varlen; 63317987Speter int easy; 634108935Stjr int quotes = flag & (EXP_FULL | EXP_CASE | EXP_REDIR); 6351556Srgrimes 6361556Srgrimes varflags = *p++; 6371556Srgrimes subtype = varflags & VSTYPE; 6381556Srgrimes var = p; 6391556Srgrimes special = 0; 6401556Srgrimes if (! is_name(*p)) 6411556Srgrimes special = 1; 6421556Srgrimes p = strchr(p, '=') + 1; 6431556Srgrimesagain: /* jump here after setting a variable with ${var=text} */ 6441556Srgrimes if (special) { 64525233Ssteve set = varisset(var, varflags & VSNUL); 6461556Srgrimes val = NULL; 6471556Srgrimes } else { 64860592Scracauer val = bltinlookup(var, 1); 64917987Speter if (val == NULL || ((varflags & VSNUL) && val[0] == '\0')) { 6501556Srgrimes val = NULL; 6511556Srgrimes set = 0; 6521556Srgrimes } else 6531556Srgrimes set = 1; 6541556Srgrimes } 65517987Speter varlen = 0; 6561556Srgrimes startloc = expdest - stackblock(); 65796939Stjr if (!set && uflag) { 65896939Stjr switch (subtype) { 65996939Stjr case VSNORMAL: 66096939Stjr case VSTRIMLEFT: 66196939Stjr case VSTRIMLEFTMAX: 66296939Stjr case VSTRIMRIGHT: 66396939Stjr case VSTRIMRIGHTMAX: 66496939Stjr case VSLENGTH: 665112254Sru error("%.*s: parameter not set", (int)(p - var - 1), 666112254Sru var); 66796939Stjr } 66896939Stjr } 6691556Srgrimes if (set && subtype != VSPLUS) { 6701556Srgrimes /* insert the value of the variable */ 6711556Srgrimes if (special) { 67218202Speter varvalue(var, varflags & VSQUOTE, flag & EXP_FULL); 67317987Speter if (subtype == VSLENGTH) { 67425233Ssteve varlen = expdest - stackblock() - startloc; 67525233Ssteve STADJUST(-varlen, expdest); 67617987Speter } 6771556Srgrimes } else { 67820425Ssteve char const *syntax = (varflags & VSQUOTE) ? DQSYNTAX 67917987Speter : BASESYNTAX; 6801556Srgrimes 68117987Speter if (subtype == VSLENGTH) { 68217987Speter for (;*val; val++) 68317987Speter varlen++; 6841556Srgrimes } 68517987Speter else { 68617987Speter while (*val) { 68783675Stegge if (quotes && 68854132Scracauer syntax[(int)*val] == CCTL) 68917987Speter STPUTC(CTLESC, expdest); 69017987Speter STPUTC(*val++, expdest); 69117987Speter } 69217987Speter 69317987Speter } 6941556Srgrimes } 6951556Srgrimes } 69620425Ssteve 6971556Srgrimes if (subtype == VSPLUS) 6981556Srgrimes set = ! set; 69917987Speter 70020425Ssteve easy = ((varflags & VSQUOTE) == 0 || 70117987Speter (*var == '@' && shellparam.nparam != 1)); 70217987Speter 70317987Speter 70417987Speter switch (subtype) { 70517987Speter case VSLENGTH: 70617987Speter expdest = cvtnum(varlen, expdest); 70717987Speter goto record; 70817987Speter 70917987Speter case VSNORMAL: 71017987Speter if (!easy) 71117987Speter break; 71217987Speterrecord: 71320425Ssteve recordregion(startloc, expdest - stackblock(), 71417987Speter varflags & VSQUOTE); 71517987Speter break; 71617987Speter 71717987Speter case VSPLUS: 71817987Speter case VSMINUS: 71917987Speter if (!set) { 7201556Srgrimes argstr(p, flag); 72117987Speter break; 72217987Speter } 72317987Speter if (easy) 72417987Speter goto record; 72517987Speter break; 72617987Speter 72717987Speter case VSTRIMLEFT: 72817987Speter case VSTRIMLEFTMAX: 72917987Speter case VSTRIMRIGHT: 73017987Speter case VSTRIMRIGHTMAX: 73117987Speter if (!set) 73217987Speter break; 73317987Speter /* 73417987Speter * Terminate the string and start recording the pattern 73517987Speter * right after it 73617987Speter */ 73717987Speter STPUTC('\0', expdest); 73845644Stegge patloc = expdest - stackblock(); 73945644Stegge if (subevalvar(p, NULL, patloc, subtype, 74038887Stegge startloc, varflags) == 0) { 74145644Stegge int amount = (expdest - stackblock() - patloc) + 1; 74225233Ssteve STADJUST(-amount, expdest); 74325233Ssteve } 74438887Stegge /* Remove any recorded regions beyond start of variable */ 74538887Stegge removerecordregions(startloc); 74638887Stegge goto record; 74717987Speter 74817987Speter case VSASSIGN: 74917987Speter case VSQUESTION: 75017987Speter if (!set) { 75120425Ssteve if (subevalvar(p, var, 0, subtype, startloc, varflags)) { 75220425Ssteve varflags &= ~VSNUL; 753155301Sschweikh /* 754155301Sschweikh * Remove any recorded regions beyond 755155301Sschweikh * start of variable 75638887Stegge */ 75738887Stegge removerecordregions(startloc); 7581556Srgrimes goto again; 75920425Ssteve } 76017987Speter break; 7611556Srgrimes } 76217987Speter if (easy) 76317987Speter goto record; 76417987Speter break; 76517987Speter 76617987Speter default: 76717987Speter abort(); 7681556Srgrimes } 76917987Speter 7701556Srgrimes if (subtype != VSNORMAL) { /* skip to end of alternative */ 7711556Srgrimes int nesting = 1; 7721556Srgrimes for (;;) { 7731556Srgrimes if ((c = *p++) == CTLESC) 7741556Srgrimes p++; 7751556Srgrimes else if (c == CTLBACKQ || c == (CTLBACKQ|CTLQUOTE)) { 7761556Srgrimes if (set) 7771556Srgrimes argbackq = argbackq->next; 7781556Srgrimes } else if (c == CTLVAR) { 7791556Srgrimes if ((*p++ & VSTYPE) != VSNORMAL) 7801556Srgrimes nesting++; 7811556Srgrimes } else if (c == CTLENDVAR) { 7821556Srgrimes if (--nesting == 0) 7831556Srgrimes break; 7841556Srgrimes } 7851556Srgrimes } 7861556Srgrimes } 7871556Srgrimes return p; 7881556Srgrimes} 7891556Srgrimes 7901556Srgrimes 7911556Srgrimes 7921556Srgrimes/* 7931556Srgrimes * Test whether a specialized variable is set. 7941556Srgrimes */ 7951556Srgrimes 7961556SrgrimesSTATIC int 79790111Simpvarisset(char *name, int nulok) 79825233Ssteve{ 7991556Srgrimes 80025233Ssteve if (*name == '!') 80125233Ssteve return backgndpid != -1; 80225233Ssteve else if (*name == '@' || *name == '*') { 8031556Srgrimes if (*shellparam.p == NULL) 8041556Srgrimes return 0; 80525233Ssteve 80625233Ssteve if (nulok) { 80725233Ssteve char **av; 80825233Ssteve 80925233Ssteve for (av = shellparam.p; *av; av++) 81025233Ssteve if (**av != '\0') 81125233Ssteve return 1; 81225233Ssteve return 0; 81325233Ssteve } 81418202Speter } else if (is_digit(*name)) { 81525233Ssteve char *ap; 81620425Ssteve int num = atoi(name); 81725233Ssteve 81825233Ssteve if (num > shellparam.nparam) 81925233Ssteve return 0; 82025233Ssteve 82125233Ssteve if (num == 0) 82225233Ssteve ap = arg0; 82325233Ssteve else 82425233Ssteve ap = shellparam.p[num - 1]; 82525233Ssteve 82625233Ssteve if (nulok && (ap == NULL || *ap == '\0')) 82725233Ssteve return 0; 8281556Srgrimes } 8291556Srgrimes return 1; 8301556Srgrimes} 8311556Srgrimes 8321556Srgrimes 8331556Srgrimes 8341556Srgrimes/* 8351556Srgrimes * Add the value of a specialized variable to the stack string. 8361556Srgrimes */ 8371556Srgrimes 8381556SrgrimesSTATIC void 83990111Simpvarvalue(char *name, int quoted, int allow_split) 84017987Speter{ 8411556Srgrimes int num; 8421556Srgrimes char *p; 8431556Srgrimes int i; 84417987Speter extern int oexitstatus; 8451556Srgrimes char sep; 8461556Srgrimes char **ap; 8471556Srgrimes char const *syntax; 8481556Srgrimes 8491556Srgrimes#define STRTODEST(p) \ 8501556Srgrimes do {\ 8511556Srgrimes if (allow_split) { \ 8521556Srgrimes syntax = quoted? DQSYNTAX : BASESYNTAX; \ 8531556Srgrimes while (*p) { \ 85483675Stegge if (syntax[(int)*p] == CCTL) \ 8551556Srgrimes STPUTC(CTLESC, expdest); \ 8561556Srgrimes STPUTC(*p++, expdest); \ 8571556Srgrimes } \ 8581556Srgrimes } else \ 8591556Srgrimes while (*p) \ 8601556Srgrimes STPUTC(*p++, expdest); \ 8611556Srgrimes } while (0) 8621556Srgrimes 8631556Srgrimes 86418202Speter switch (*name) { 8651556Srgrimes case '$': 8661556Srgrimes num = rootpid; 8671556Srgrimes goto numvar; 8681556Srgrimes case '?': 86917987Speter num = oexitstatus; 8701556Srgrimes goto numvar; 8711556Srgrimes case '#': 8721556Srgrimes num = shellparam.nparam; 8731556Srgrimes goto numvar; 8741556Srgrimes case '!': 8751556Srgrimes num = backgndpid; 8761556Srgrimesnumvar: 87717987Speter expdest = cvtnum(num, expdest); 8781556Srgrimes break; 8791556Srgrimes case '-': 8801556Srgrimes for (i = 0 ; i < NOPTS ; i++) { 8811556Srgrimes if (optlist[i].val) 8821556Srgrimes STPUTC(optlist[i].letter, expdest); 8831556Srgrimes } 8841556Srgrimes break; 8851556Srgrimes case '@': 88638887Stegge if (allow_split && quoted) { 88738887Stegge for (ap = shellparam.p ; (p = *ap++) != NULL ; ) { 88838887Stegge STRTODEST(p); 88938887Stegge if (*ap) 89038887Stegge STPUTC('\0', expdest); 89138887Stegge } 89238887Stegge break; 8931556Srgrimes } 894102410Scharnier /* FALLTHROUGH */ 8951556Srgrimes case '*': 896149825Srse if (ifsset()) 89738887Stegge sep = ifsval()[0]; 89838887Stegge else 89938887Stegge sep = ' '; 9001556Srgrimes for (ap = shellparam.p ; (p = *ap++) != NULL ; ) { 9011556Srgrimes STRTODEST(p); 90238887Stegge if (*ap && sep) 9031556Srgrimes STPUTC(sep, expdest); 9041556Srgrimes } 9051556Srgrimes break; 9061556Srgrimes case '0': 9071556Srgrimes p = arg0; 9081556Srgrimes STRTODEST(p); 9091556Srgrimes break; 9101556Srgrimes default: 91118202Speter if (is_digit(*name)) { 91218202Speter num = atoi(name); 91318202Speter if (num > 0 && num <= shellparam.nparam) { 91418202Speter p = shellparam.p[num - 1]; 91518202Speter STRTODEST(p); 91618202Speter } 9171556Srgrimes } 9181556Srgrimes break; 9191556Srgrimes } 9201556Srgrimes} 9211556Srgrimes 9221556Srgrimes 9231556Srgrimes 9241556Srgrimes/* 9251556Srgrimes * Record the the fact that we have to scan this region of the 9261556Srgrimes * string for IFS characters. 9271556Srgrimes */ 9281556Srgrimes 9291556SrgrimesSTATIC void 93090111Simprecordregion(int start, int end, int nulonly) 93117987Speter{ 93225233Ssteve struct ifsregion *ifsp; 9331556Srgrimes 9341556Srgrimes if (ifslastp == NULL) { 9351556Srgrimes ifsp = &ifsfirst; 9361556Srgrimes } else { 9371556Srgrimes ifsp = (struct ifsregion *)ckmalloc(sizeof (struct ifsregion)); 9381556Srgrimes ifslastp->next = ifsp; 9391556Srgrimes } 9401556Srgrimes ifslastp = ifsp; 9411556Srgrimes ifslastp->next = NULL; 9421556Srgrimes ifslastp->begoff = start; 9431556Srgrimes ifslastp->endoff = end; 9441556Srgrimes ifslastp->nulonly = nulonly; 9451556Srgrimes} 9461556Srgrimes 9471556Srgrimes 9481556Srgrimes 9491556Srgrimes/* 9501556Srgrimes * Break the argument string into pieces based upon IFS and add the 9511556Srgrimes * strings to the argument list. The regions of the string to be 9521556Srgrimes * searched for IFS characters have been stored by recordregion. 9531556Srgrimes */ 9541556SrgrimesSTATIC void 95590111Simpifsbreakup(char *string, struct arglist *arglist) 95690111Simp{ 9571556Srgrimes struct ifsregion *ifsp; 9581556Srgrimes struct strlist *sp; 9591556Srgrimes char *start; 96025233Ssteve char *p; 9611556Srgrimes char *q; 9621556Srgrimes char *ifs; 96317987Speter int ifsspc; 96438887Stegge int nulonly; 9651556Srgrimes 96617987Speter 9671556Srgrimes start = string; 96838887Stegge ifsspc = 0; 96938887Stegge nulonly = 0; 9701556Srgrimes if (ifslastp != NULL) { 9711556Srgrimes ifsp = &ifsfirst; 9721556Srgrimes do { 9731556Srgrimes p = string + ifsp->begoff; 97438887Stegge nulonly = ifsp->nulonly; 975155301Sschweikh ifs = nulonly ? nullstr : 97638887Stegge ( ifsset() ? ifsval() : " \t\n" ); 97738887Stegge ifsspc = 0; 9781556Srgrimes while (p < string + ifsp->endoff) { 9791556Srgrimes q = p; 9801556Srgrimes if (*p == CTLESC) 9811556Srgrimes p++; 98238887Stegge if (strchr(ifs, *p)) { 98338887Stegge if (!nulonly) 98438887Stegge ifsspc = (strchr(" \t\n", *p) != NULL); 98538887Stegge /* Ignore IFS whitespace at start */ 98638887Stegge if (q == start && ifsspc) { 98738887Stegge p++; 98838887Stegge start = p; 98938887Stegge continue; 9901556Srgrimes } 99138887Stegge *q = '\0'; 99238887Stegge sp = (struct strlist *)stalloc(sizeof *sp); 99338887Stegge sp->text = start; 99438887Stegge *arglist->lastp = sp; 99538887Stegge arglist->lastp = &sp->next; 99638887Stegge p++; 99738887Stegge if (!nulonly) { 9981556Srgrimes for (;;) { 99938887Stegge if (p >= string + ifsp->endoff) { 10001556Srgrimes break; 100138887Stegge } 10021556Srgrimes q = p; 10031556Srgrimes if (*p == CTLESC) 10041556Srgrimes p++; 100538887Stegge if (strchr(ifs, *p) == NULL ) { 10061556Srgrimes p = q; 10071556Srgrimes break; 100838887Stegge } else if (strchr(" \t\n",*p) == NULL) { 100938887Stegge if (ifsspc) { 101038887Stegge p++; 101138887Stegge ifsspc = 0; 101238887Stegge } else { 101338887Stegge p = q; 101438887Stegge break; 101538887Stegge } 101638887Stegge } else 101738887Stegge p++; 10181556Srgrimes } 10191556Srgrimes } 10201556Srgrimes start = p; 102138887Stegge } else 102238887Stegge p++; 10231556Srgrimes } 10241556Srgrimes } while ((ifsp = ifsp->next) != NULL); 1025149825Srse if (*start || (!ifsspc && start > string)) { 10261556Srgrimes sp = (struct strlist *)stalloc(sizeof *sp); 10271556Srgrimes sp->text = start; 10281556Srgrimes *arglist->lastp = sp; 10291556Srgrimes arglist->lastp = &sp->next; 10301556Srgrimes } 10311556Srgrimes } else { 10321556Srgrimes sp = (struct strlist *)stalloc(sizeof *sp); 10331556Srgrimes sp->text = start; 10341556Srgrimes *arglist->lastp = sp; 10351556Srgrimes arglist->lastp = &sp->next; 10361556Srgrimes } 10371556Srgrimes} 10381556Srgrimes 10391556Srgrimes 10401556Srgrimes 10411556Srgrimes/* 10421556Srgrimes * Expand shell metacharacters. At this point, the only control characters 10431556Srgrimes * should be escapes. The results are stored in the list exparg. 10441556Srgrimes */ 10451556Srgrimes 1046117261SddsSTATIC char *expdir; 10471556Srgrimes 10481556Srgrimes 10491556SrgrimesSTATIC void 105090111Simpexpandmeta(struct strlist *str, int flag __unused) 105117987Speter{ 10521556Srgrimes char *p; 10531556Srgrimes struct strlist **savelastp; 10541556Srgrimes struct strlist *sp; 10551556Srgrimes char c; 10561556Srgrimes /* TODO - EXP_REDIR */ 10571556Srgrimes 10581556Srgrimes while (str) { 10591556Srgrimes if (fflag) 10601556Srgrimes goto nometa; 10611556Srgrimes p = str->text; 10621556Srgrimes for (;;) { /* fast check for meta chars */ 10631556Srgrimes if ((c = *p++) == '\0') 10641556Srgrimes goto nometa; 10651556Srgrimes if (c == '*' || c == '?' || c == '[' || c == '!') 10661556Srgrimes break; 10671556Srgrimes } 10681556Srgrimes savelastp = exparg.lastp; 10691556Srgrimes INTOFF; 10701556Srgrimes if (expdir == NULL) { 10711556Srgrimes int i = strlen(str->text); 10721556Srgrimes expdir = ckmalloc(i < 2048 ? 2048 : i); /* XXX */ 10731556Srgrimes } 10741556Srgrimes 10751556Srgrimes expmeta(expdir, str->text); 10761556Srgrimes ckfree(expdir); 10771556Srgrimes expdir = NULL; 10781556Srgrimes INTON; 10791556Srgrimes if (exparg.lastp == savelastp) { 10808855Srgrimes /* 10818855Srgrimes * no matches 10821556Srgrimes */ 10831556Srgrimesnometa: 10841556Srgrimes *exparg.lastp = str; 10851556Srgrimes rmescapes(str->text); 10861556Srgrimes exparg.lastp = &str->next; 10871556Srgrimes } else { 10881556Srgrimes *exparg.lastp = NULL; 10891556Srgrimes *savelastp = sp = expsort(*savelastp); 10901556Srgrimes while (sp->next != NULL) 10911556Srgrimes sp = sp->next; 10921556Srgrimes exparg.lastp = &sp->next; 10931556Srgrimes } 10941556Srgrimes str = str->next; 10951556Srgrimes } 10961556Srgrimes} 10971556Srgrimes 10981556Srgrimes 10991556Srgrimes/* 11001556Srgrimes * Do metacharacter (i.e. *, ?, [...]) expansion. 11011556Srgrimes */ 11021556Srgrimes 11031556SrgrimesSTATIC void 110490111Simpexpmeta(char *enddir, char *name) 110590111Simp{ 110625233Ssteve char *p; 11071556Srgrimes char *q; 11081556Srgrimes char *start; 11091556Srgrimes char *endname; 11101556Srgrimes int metaflag; 11111556Srgrimes struct stat statb; 11121556Srgrimes DIR *dirp; 11131556Srgrimes struct dirent *dp; 11141556Srgrimes int atend; 11151556Srgrimes int matchdot; 11161556Srgrimes 11171556Srgrimes metaflag = 0; 11181556Srgrimes start = name; 11191556Srgrimes for (p = name ; ; p++) { 11201556Srgrimes if (*p == '*' || *p == '?') 11211556Srgrimes metaflag = 1; 11221556Srgrimes else if (*p == '[') { 11231556Srgrimes q = p + 1; 112426488Sache if (*q == '!' || *q == '^') 11251556Srgrimes q++; 11261556Srgrimes for (;;) { 112738887Stegge while (*q == CTLQUOTEMARK) 112838887Stegge q++; 11291556Srgrimes if (*q == CTLESC) 11301556Srgrimes q++; 11311556Srgrimes if (*q == '/' || *q == '\0') 11321556Srgrimes break; 11331556Srgrimes if (*++q == ']') { 11341556Srgrimes metaflag = 1; 11351556Srgrimes break; 11361556Srgrimes } 11371556Srgrimes } 11381556Srgrimes } else if (*p == '!' && p[1] == '!' && (p == name || p[-1] == '/')) { 11391556Srgrimes metaflag = 1; 11401556Srgrimes } else if (*p == '\0') 11411556Srgrimes break; 114238887Stegge else if (*p == CTLQUOTEMARK) 114338887Stegge continue; 11441556Srgrimes else if (*p == CTLESC) 11451556Srgrimes p++; 11461556Srgrimes if (*p == '/') { 11471556Srgrimes if (metaflag) 11481556Srgrimes break; 11491556Srgrimes start = p + 1; 11501556Srgrimes } 11511556Srgrimes } 11521556Srgrimes if (metaflag == 0) { /* we've reached the end of the file name */ 11531556Srgrimes if (enddir != expdir) 11541556Srgrimes metaflag++; 11551556Srgrimes for (p = name ; ; p++) { 115638887Stegge if (*p == CTLQUOTEMARK) 115738887Stegge continue; 11581556Srgrimes if (*p == CTLESC) 11591556Srgrimes p++; 11601556Srgrimes *enddir++ = *p; 11611556Srgrimes if (*p == '\0') 11621556Srgrimes break; 11631556Srgrimes } 1164147812Sdelphij if (metaflag == 0 || lstat(expdir, &statb) >= 0) 11651556Srgrimes addfname(expdir); 11661556Srgrimes return; 11671556Srgrimes } 11681556Srgrimes endname = p; 11691556Srgrimes if (start != name) { 11701556Srgrimes p = name; 11711556Srgrimes while (p < start) { 117238887Stegge while (*p == CTLQUOTEMARK) 117338887Stegge p++; 11741556Srgrimes if (*p == CTLESC) 11751556Srgrimes p++; 11761556Srgrimes *enddir++ = *p++; 11771556Srgrimes } 11781556Srgrimes } 11791556Srgrimes if (enddir == expdir) { 11801556Srgrimes p = "."; 11811556Srgrimes } else if (enddir == expdir + 1 && *expdir == '/') { 11821556Srgrimes p = "/"; 11831556Srgrimes } else { 11841556Srgrimes p = expdir; 11851556Srgrimes enddir[-1] = '\0'; 11861556Srgrimes } 11871556Srgrimes if ((dirp = opendir(p)) == NULL) 11881556Srgrimes return; 11891556Srgrimes if (enddir != expdir) 11901556Srgrimes enddir[-1] = '/'; 11911556Srgrimes if (*endname == 0) { 11921556Srgrimes atend = 1; 11931556Srgrimes } else { 11941556Srgrimes atend = 0; 11951556Srgrimes *endname++ = '\0'; 11961556Srgrimes } 11971556Srgrimes matchdot = 0; 119838887Stegge p = start; 119938887Stegge while (*p == CTLQUOTEMARK) 120038887Stegge p++; 120138887Stegge if (*p == CTLESC) 120238887Stegge p++; 120338887Stegge if (*p == '.') 12041556Srgrimes matchdot++; 12051556Srgrimes while (! int_pending() && (dp = readdir(dirp)) != NULL) { 12061556Srgrimes if (dp->d_name[0] == '.' && ! matchdot) 12071556Srgrimes continue; 120845514Stegge if (patmatch(start, dp->d_name, 0)) { 12091556Srgrimes if (atend) { 12101556Srgrimes scopy(dp->d_name, enddir); 12111556Srgrimes addfname(expdir); 12121556Srgrimes } else { 121317987Speter for (p = enddir, q = dp->d_name; 121417987Speter (*p++ = *q++) != '\0';) 121517987Speter continue; 12161556Srgrimes p[-1] = '/'; 12171556Srgrimes expmeta(p, endname); 12181556Srgrimes } 12191556Srgrimes } 12201556Srgrimes } 12211556Srgrimes closedir(dirp); 12221556Srgrimes if (! atend) 12231556Srgrimes endname[-1] = '/'; 12241556Srgrimes} 12251556Srgrimes 12261556Srgrimes 12271556Srgrimes/* 12281556Srgrimes * Add a file name to the list. 12291556Srgrimes */ 12301556Srgrimes 12311556SrgrimesSTATIC void 123290111Simpaddfname(char *name) 123390111Simp{ 12341556Srgrimes char *p; 12351556Srgrimes struct strlist *sp; 12361556Srgrimes 12371556Srgrimes p = stalloc(strlen(name) + 1); 12381556Srgrimes scopy(name, p); 12391556Srgrimes sp = (struct strlist *)stalloc(sizeof *sp); 12401556Srgrimes sp->text = p; 12411556Srgrimes *exparg.lastp = sp; 12421556Srgrimes exparg.lastp = &sp->next; 12431556Srgrimes} 12441556Srgrimes 12451556Srgrimes 12461556Srgrimes/* 12471556Srgrimes * Sort the results of file name expansion. It calculates the number of 12481556Srgrimes * strings to sort and then calls msort (short for merge sort) to do the 12491556Srgrimes * work. 12501556Srgrimes */ 12511556Srgrimes 12521556SrgrimesSTATIC struct strlist * 125390111Simpexpsort(struct strlist *str) 125490111Simp{ 12551556Srgrimes int len; 12561556Srgrimes struct strlist *sp; 12571556Srgrimes 12581556Srgrimes len = 0; 12591556Srgrimes for (sp = str ; sp ; sp = sp->next) 12601556Srgrimes len++; 12611556Srgrimes return msort(str, len); 12621556Srgrimes} 12631556Srgrimes 12641556Srgrimes 12651556SrgrimesSTATIC struct strlist * 126690111Simpmsort(struct strlist *list, int len) 126717987Speter{ 126817987Speter struct strlist *p, *q = NULL; 12691556Srgrimes struct strlist **lpp; 12701556Srgrimes int half; 12711556Srgrimes int n; 12721556Srgrimes 12731556Srgrimes if (len <= 1) 12741556Srgrimes return list; 12758855Srgrimes half = len >> 1; 12761556Srgrimes p = list; 12771556Srgrimes for (n = half ; --n >= 0 ; ) { 12781556Srgrimes q = p; 12791556Srgrimes p = p->next; 12801556Srgrimes } 12811556Srgrimes q->next = NULL; /* terminate first half of list */ 12821556Srgrimes q = msort(list, half); /* sort first half of list */ 12831556Srgrimes p = msort(p, len - half); /* sort second half */ 12841556Srgrimes lpp = &list; 12851556Srgrimes for (;;) { 12861556Srgrimes if (strcmp(p->text, q->text) < 0) { 12871556Srgrimes *lpp = p; 12881556Srgrimes lpp = &p->next; 12891556Srgrimes if ((p = *lpp) == NULL) { 12901556Srgrimes *lpp = q; 12911556Srgrimes break; 12921556Srgrimes } 12931556Srgrimes } else { 12941556Srgrimes *lpp = q; 12951556Srgrimes lpp = &q->next; 12961556Srgrimes if ((q = *lpp) == NULL) { 12971556Srgrimes *lpp = p; 12981556Srgrimes break; 12991556Srgrimes } 13001556Srgrimes } 13011556Srgrimes } 13021556Srgrimes return list; 13031556Srgrimes} 13041556Srgrimes 13051556Srgrimes 13061556Srgrimes 13071556Srgrimes/* 13081556Srgrimes * Returns true if the pattern matches the string. 13091556Srgrimes */ 13101556Srgrimes 13111556Srgrimesint 131290111Simppatmatch(char *pattern, char *string, int squoted) 131390111Simp{ 13141556Srgrimes#ifdef notdef 13151556Srgrimes if (pattern[0] == '!' && pattern[1] == '!') 13161556Srgrimes return 1 - pmatch(pattern + 2, string); 13171556Srgrimes else 13181556Srgrimes#endif 131945514Stegge return pmatch(pattern, string, squoted); 13201556Srgrimes} 13211556Srgrimes 132217987Speter 132317525SacheSTATIC int 132490111Simppmatch(char *pattern, char *string, int squoted) 132590111Simp{ 132625233Ssteve char *p, *q; 132725233Ssteve char c; 13281556Srgrimes 13291556Srgrimes p = pattern; 13301556Srgrimes q = string; 13311556Srgrimes for (;;) { 13321556Srgrimes switch (c = *p++) { 13331556Srgrimes case '\0': 13341556Srgrimes goto breakloop; 13351556Srgrimes case CTLESC: 133645514Stegge if (squoted && *q == CTLESC) 133745514Stegge q++; 13381556Srgrimes if (*q++ != *p++) 13391556Srgrimes return 0; 13401556Srgrimes break; 134138887Stegge case CTLQUOTEMARK: 134238887Stegge continue; 13431556Srgrimes case '?': 134445514Stegge if (squoted && *q == CTLESC) 134545514Stegge q++; 13461556Srgrimes if (*q++ == '\0') 13471556Srgrimes return 0; 13481556Srgrimes break; 13491556Srgrimes case '*': 13501556Srgrimes c = *p; 135138887Stegge while (c == CTLQUOTEMARK || c == '*') 135238887Stegge c = *++p; 135338887Stegge if (c != CTLESC && c != CTLQUOTEMARK && 135438887Stegge c != '?' && c != '*' && c != '[') { 13551556Srgrimes while (*q != c) { 135645514Stegge if (squoted && *q == CTLESC && 135745514Stegge q[1] == c) 135845514Stegge break; 13591556Srgrimes if (*q == '\0') 13601556Srgrimes return 0; 136145514Stegge if (squoted && *q == CTLESC) 136245514Stegge q++; 13631556Srgrimes q++; 13641556Srgrimes } 13651556Srgrimes } 13661556Srgrimes do { 136745514Stegge if (pmatch(p, q, squoted)) 13681556Srgrimes return 1; 136945514Stegge if (squoted && *q == CTLESC) 137045514Stegge q++; 13711556Srgrimes } while (*q++ != '\0'); 13721556Srgrimes return 0; 13731556Srgrimes case '[': { 13741556Srgrimes char *endp; 13751556Srgrimes int invert, found; 13761556Srgrimes char chr; 13771556Srgrimes 13781556Srgrimes endp = p; 137926488Sache if (*endp == '!' || *endp == '^') 13801556Srgrimes endp++; 13811556Srgrimes for (;;) { 138238887Stegge while (*endp == CTLQUOTEMARK) 138338887Stegge endp++; 13841556Srgrimes if (*endp == '\0') 13851556Srgrimes goto dft; /* no matching ] */ 13861556Srgrimes if (*endp == CTLESC) 13871556Srgrimes endp++; 13881556Srgrimes if (*++endp == ']') 13891556Srgrimes break; 13901556Srgrimes } 13911556Srgrimes invert = 0; 139226488Sache if (*p == '!' || *p == '^') { 13931556Srgrimes invert++; 13941556Srgrimes p++; 13951556Srgrimes } 13961556Srgrimes found = 0; 13971556Srgrimes chr = *q++; 139845514Stegge if (squoted && chr == CTLESC) 139945514Stegge chr = *q++; 140017987Speter if (chr == '\0') 140117987Speter return 0; 14021556Srgrimes c = *p++; 14031556Srgrimes do { 140438887Stegge if (c == CTLQUOTEMARK) 140538887Stegge continue; 14061556Srgrimes if (c == CTLESC) 14071556Srgrimes c = *p++; 14081556Srgrimes if (*p == '-' && p[1] != ']') { 14091556Srgrimes p++; 141038887Stegge while (*p == CTLQUOTEMARK) 141138887Stegge p++; 14121556Srgrimes if (*p == CTLESC) 14131556Srgrimes p++; 141417557Sache if ( collate_range_cmp(chr, c) >= 0 141517557Sache && collate_range_cmp(chr, *p) <= 0 141617525Sache ) 14171556Srgrimes found = 1; 14181556Srgrimes p++; 14191556Srgrimes } else { 14201556Srgrimes if (chr == c) 14211556Srgrimes found = 1; 14221556Srgrimes } 14231556Srgrimes } while ((c = *p++) != ']'); 14241556Srgrimes if (found == invert) 14251556Srgrimes return 0; 14261556Srgrimes break; 14271556Srgrimes } 14281556Srgrimesdft: default: 142945514Stegge if (squoted && *q == CTLESC) 143045514Stegge q++; 14311556Srgrimes if (*q++ != c) 14321556Srgrimes return 0; 14331556Srgrimes break; 14341556Srgrimes } 14351556Srgrimes } 14361556Srgrimesbreakloop: 14371556Srgrimes if (*q != '\0') 14381556Srgrimes return 0; 14391556Srgrimes return 1; 14401556Srgrimes} 14411556Srgrimes 14421556Srgrimes 14431556Srgrimes 14441556Srgrimes/* 14451556Srgrimes * Remove any CTLESC characters from a string. 14461556Srgrimes */ 14471556Srgrimes 14481556Srgrimesvoid 144990111Simprmescapes(char *str) 145038887Stegge{ 145125233Ssteve char *p, *q; 14521556Srgrimes 14531556Srgrimes p = str; 145438887Stegge while (*p != CTLESC && *p != CTLQUOTEMARK) { 14551556Srgrimes if (*p++ == '\0') 14561556Srgrimes return; 14571556Srgrimes } 14581556Srgrimes q = p; 14591556Srgrimes while (*p) { 146038887Stegge if (*p == CTLQUOTEMARK) { 146138887Stegge p++; 146238887Stegge continue; 146338887Stegge } 14641556Srgrimes if (*p == CTLESC) 14651556Srgrimes p++; 14661556Srgrimes *q++ = *p++; 14671556Srgrimes } 14681556Srgrimes *q = '\0'; 14691556Srgrimes} 14701556Srgrimes 14711556Srgrimes 14721556Srgrimes 14731556Srgrimes/* 14741556Srgrimes * See if a pattern matches in a case statement. 14751556Srgrimes */ 14761556Srgrimes 14771556Srgrimesint 147890111Simpcasematch(union node *pattern, char *val) 147990111Simp{ 14801556Srgrimes struct stackmark smark; 14811556Srgrimes int result; 14821556Srgrimes char *p; 14831556Srgrimes 14841556Srgrimes setstackmark(&smark); 14851556Srgrimes argbackq = pattern->narg.backquote; 14861556Srgrimes STARTSTACKSTR(expdest); 14871556Srgrimes ifslastp = NULL; 14881556Srgrimes argstr(pattern->narg.text, EXP_TILDE | EXP_CASE); 14891556Srgrimes STPUTC('\0', expdest); 14901556Srgrimes p = grabstackstr(expdest); 149145514Stegge result = patmatch(p, val, 0); 14921556Srgrimes popstackmark(&smark); 14931556Srgrimes return result; 14941556Srgrimes} 149517987Speter 149617987Speter/* 149717987Speter * Our own itoa(). 149817987Speter */ 149917987Speter 150017987SpeterSTATIC char * 150190111Simpcvtnum(int num, char *buf) 150290111Simp{ 150317987Speter char temp[32]; 150417987Speter int neg = num < 0; 150517987Speter char *p = temp + 31; 150617987Speter 150717987Speter temp[31] = '\0'; 150817987Speter 150917987Speter do { 151017987Speter *--p = num % 10 + '0'; 151117987Speter } while ((num /= 10) != 0); 151217987Speter 151317987Speter if (neg) 151417987Speter *--p = '-'; 151517987Speter 151617987Speter while (*p) 151717987Speter STPUTC(*p++, buf); 151817987Speter return buf; 151917987Speter} 1520108286Stjr 1521108286Stjr/* 1522108286Stjr * Do most of the work for wordexp(3). 1523108286Stjr */ 1524108286Stjr 1525108286Stjrint 1526108286Stjrwordexpcmd(int argc, char **argv) 1527108286Stjr{ 1528108286Stjr size_t len; 1529108286Stjr int i; 1530108286Stjr 1531108286Stjr out1fmt("%08x", argc - 1); 1532108286Stjr for (i = 1, len = 0; i < argc; i++) 1533108286Stjr len += strlen(argv[i]); 1534108286Stjr out1fmt("%08x", (int)len); 1535108286Stjr for (i = 1; i < argc; i++) { 1536108286Stjr out1str(argv[i]); 1537108286Stjr out1c('\0'); 1538108286Stjr } 1539108286Stjr return (0); 1540108286Stjr} 1541