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("$FreeBSD$"); 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> 56223120Sjilles#include <wctype.h> 5717987Speter 581556Srgrimes/* 591556Srgrimes * Routines to expand arguments to commands. We have to deal with 601556Srgrimes * backquotes, shell variables, and file metacharacters. 611556Srgrimes */ 621556Srgrimes 631556Srgrimes#include "shell.h" 641556Srgrimes#include "main.h" 651556Srgrimes#include "nodes.h" 661556Srgrimes#include "eval.h" 671556Srgrimes#include "expand.h" 681556Srgrimes#include "syntax.h" 691556Srgrimes#include "parser.h" 701556Srgrimes#include "jobs.h" 711556Srgrimes#include "options.h" 721556Srgrimes#include "var.h" 731556Srgrimes#include "input.h" 741556Srgrimes#include "output.h" 751556Srgrimes#include "memalloc.h" 761556Srgrimes#include "error.h" 771556Srgrimes#include "mystring.h" 7817987Speter#include "arith.h" 7917987Speter#include "show.h" 80223060Sjilles#include "builtins.h" 811556Srgrimes 821556Srgrimes/* 831556Srgrimes * Structure specifying which parts of the string should be searched 841556Srgrimes * for IFS characters. 851556Srgrimes */ 861556Srgrimes 871556Srgrimesstruct ifsregion { 881556Srgrimes struct ifsregion *next; /* next region in list */ 891556Srgrimes int begoff; /* offset of start of region */ 901556Srgrimes int endoff; /* offset of end of region */ 91194975Sjilles int inquotes; /* search for nul bytes only */ 921556Srgrimes}; 931556Srgrimes 941556Srgrimes 95213760Sobrienstatic char *expdest; /* output of current string */ 96213760Sobrienstatic struct nodelist *argbackq; /* list of back quote expressions */ 97213760Sobrienstatic struct ifsregion ifsfirst; /* first struct in list of ifs regions */ 98213760Sobrienstatic struct ifsregion *ifslastp; /* last struct in list */ 99213760Sobrienstatic struct arglist exparg; /* holds expanded arg list */ 1001556Srgrimes 101213811Sobrienstatic void argstr(char *, int); 102213811Sobrienstatic char *exptilde(char *, int); 103213811Sobrienstatic void expbackq(union node *, int, int); 104214524Sjillesstatic int subevalvar(char *, char *, int, int, int, int, int); 105213811Sobrienstatic char *evalvar(char *, int); 106213811Sobrienstatic int varisset(char *, int); 107213811Sobrienstatic void varvalue(char *, int, int, int); 108213811Sobrienstatic void recordregion(int, int, int); 109213811Sobrienstatic void removerecordregions(int); 110213811Sobrienstatic void ifsbreakup(char *, struct arglist *); 111213811Sobrienstatic void expandmeta(struct strlist *, int); 112213811Sobrienstatic void expmeta(char *, char *); 113213811Sobrienstatic void addfname(char *); 114213811Sobrienstatic struct strlist *expsort(struct strlist *); 115213811Sobrienstatic struct strlist *msort(struct strlist *, int); 116231790Sjillesstatic int patmatch(const char *, const char *, int); 117213811Sobrienstatic char *cvtnum(int, char *); 118221646Sjillesstatic int collate_range_cmp(wchar_t, wchar_t); 1191556Srgrimes 120213811Sobrienstatic int 121221646Sjillescollate_range_cmp(wchar_t c1, wchar_t c2) 12219281Sache{ 123221646Sjilles static wchar_t s1[2], s2[2]; 12419281Sache 12519281Sache s1[0] = c1; 12619281Sache s2[0] = c2; 127221646Sjilles return (wcscoll(s1, s2)); 12819281Sache} 12919281Sache 1301556Srgrimes/* 1311556Srgrimes * Expand shell variables and backquotes inside a here document. 13290111Simp * union node *arg the document 13390111Simp * int fd; where to write the expanded version 1341556Srgrimes */ 1351556Srgrimes 1361556Srgrimesvoid 13790111Simpexpandhere(union node *arg, int fd) 13890111Simp{ 1391556Srgrimes expandarg(arg, (struct arglist *)NULL, 0); 14039137Stegge xwrite(fd, stackblock(), expdest - stackblock()); 1411556Srgrimes} 1421556Srgrimes 143216384Sjillesstatic char * 144216384Sjillesstputs_quotes(const char *data, const char *syntax, char *p) 145216384Sjilles{ 146216384Sjilles while (*data) { 147216384Sjilles CHECKSTRSPACE(2, p); 148216384Sjilles if (syntax[(int)*data] == CCTL) 149216384Sjilles USTPUTC(CTLESC, p); 150216384Sjilles USTPUTC(*data++, p); 151216384Sjilles } 152216384Sjilles return (p); 153216384Sjilles} 154216384Sjilles#define STPUTS_QUOTES(data, syntax, p) p = stputs_quotes((data), syntax, p) 1551556Srgrimes 1561556Srgrimes/* 157212243Sjilles * Perform expansions on an argument, placing the resulting list of arguments 158212243Sjilles * in arglist. Parameter expansion, command substitution and arithmetic 159212243Sjilles * expansion are always performed; additional expansions can be requested 160212243Sjilles * via flag (EXP_*). 161212243Sjilles * The result is left in the stack string. 162218203Sjilles * When arglist is NULL, perform here document expansion. 163212243Sjilles * 164212243Sjilles * Caution: this function uses global state and is not reentrant. 165212243Sjilles * However, a new invocation after an interrupted invocation is safe 166212243Sjilles * and will reset the global state for the new call. 1671556Srgrimes */ 1681556Srgrimesvoid 16990111Simpexpandarg(union node *arg, struct arglist *arglist, int flag) 17017987Speter{ 1711556Srgrimes struct strlist *sp; 1721556Srgrimes char *p; 1731556Srgrimes 1741556Srgrimes argbackq = arg->narg.backquote; 1751556Srgrimes STARTSTACKSTR(expdest); 1761556Srgrimes ifsfirst.next = NULL; 1771556Srgrimes ifslastp = NULL; 1781556Srgrimes argstr(arg->narg.text, flag); 1791556Srgrimes if (arglist == NULL) { 180222907Sjilles STACKSTRNUL(expdest); 1811556Srgrimes return; /* here document expanded */ 1821556Srgrimes } 1831556Srgrimes STPUTC('\0', expdest); 1841556Srgrimes p = grabstackstr(expdest); 1851556Srgrimes exparg.lastp = &exparg.list; 1861556Srgrimes /* 1871556Srgrimes * TODO - EXP_REDIR 1881556Srgrimes */ 1891556Srgrimes if (flag & EXP_FULL) { 1901556Srgrimes ifsbreakup(p, &exparg); 1911556Srgrimes *exparg.lastp = NULL; 1921556Srgrimes exparg.lastp = &exparg.list; 1931556Srgrimes expandmeta(exparg.list, flag); 1941556Srgrimes } else { 1951556Srgrimes if (flag & EXP_REDIR) /*XXX - for now, just remove escapes */ 1961556Srgrimes rmescapes(p); 1971556Srgrimes sp = (struct strlist *)stalloc(sizeof (struct strlist)); 1981556Srgrimes sp->text = p; 1991556Srgrimes *exparg.lastp = sp; 2001556Srgrimes exparg.lastp = &sp->next; 2011556Srgrimes } 2021556Srgrimes while (ifsfirst.next != NULL) { 2031556Srgrimes struct ifsregion *ifsp; 2041556Srgrimes INTOFF; 2051556Srgrimes ifsp = ifsfirst.next->next; 2061556Srgrimes ckfree(ifsfirst.next); 2071556Srgrimes ifsfirst.next = ifsp; 2081556Srgrimes INTON; 2091556Srgrimes } 2101556Srgrimes *exparg.lastp = NULL; 2111556Srgrimes if (exparg.list) { 2121556Srgrimes *arglist->lastp = exparg.list; 2131556Srgrimes arglist->lastp = exparg.lastp; 2141556Srgrimes } 2151556Srgrimes} 2161556Srgrimes 2171556Srgrimes 2181556Srgrimes 2191556Srgrimes/* 220212243Sjilles * Perform parameter expansion, command substitution and arithmetic 221212243Sjilles * expansion, and tilde expansion if requested via EXP_TILDE/EXP_VARTILDE. 222212243Sjilles * Processing ends at a CTLENDVAR character as well as '\0'. 223212243Sjilles * This is used to expand word in ${var+word} etc. 224212243Sjilles * If EXP_FULL, EXP_CASE or EXP_REDIR are set, keep and/or generate CTLESC 225212243Sjilles * characters to allow for further processing. 226212243Sjilles * If EXP_FULL is set, also preserve CTLQUOTEMARK characters. 2271556Srgrimes */ 228213811Sobrienstatic void 22990111Simpargstr(char *p, int flag) 23017987Speter{ 23125233Ssteve char c; 232104672Stjr int quotes = flag & (EXP_FULL | EXP_CASE | EXP_REDIR); /* do CTLESC */ 2331556Srgrimes int firsteq = 1; 234214512Sjilles int split_lit; 235214512Sjilles int lit_quoted; 2361556Srgrimes 237214512Sjilles split_lit = flag & EXP_SPLIT_LIT; 238214512Sjilles lit_quoted = flag & EXP_LIT_QUOTED; 239214512Sjilles flag &= ~(EXP_SPLIT_LIT | EXP_LIT_QUOTED); 2401556Srgrimes if (*p == '~' && (flag & (EXP_TILDE | EXP_VARTILDE))) 2411556Srgrimes p = exptilde(p, flag); 2421556Srgrimes for (;;) { 243215783Sjilles CHECKSTRSPACE(2, expdest); 2441556Srgrimes switch (c = *p++) { 2451556Srgrimes case '\0': 246212243Sjilles case CTLENDVAR: 2471556Srgrimes goto breakloop; 24838887Stegge case CTLQUOTEMARK: 249214512Sjilles lit_quoted = 1; 25038887Stegge /* "$@" syntax adherence hack */ 25138887Stegge if (p[0] == CTLVAR && p[2] == '@' && p[3] == '=') 25238887Stegge break; 25339137Stegge if ((flag & EXP_FULL) != 0) 254215783Sjilles USTPUTC(c, expdest); 25538887Stegge break; 256214512Sjilles case CTLQUOTEEND: 257214512Sjilles lit_quoted = 0; 258214512Sjilles break; 2591556Srgrimes case CTLESC: 2601556Srgrimes if (quotes) 261215783Sjilles USTPUTC(c, expdest); 2621556Srgrimes c = *p++; 263215783Sjilles USTPUTC(c, expdest); 264214512Sjilles if (split_lit && !lit_quoted) 265214512Sjilles recordregion(expdest - stackblock() - 266214512Sjilles (quotes ? 2 : 1), 267214512Sjilles expdest - stackblock(), 0); 2681556Srgrimes break; 2691556Srgrimes case CTLVAR: 2701556Srgrimes p = evalvar(p, flag); 2711556Srgrimes break; 2721556Srgrimes case CTLBACKQ: 2731556Srgrimes case CTLBACKQ|CTLQUOTE: 2741556Srgrimes expbackq(argbackq->n, c & CTLQUOTE, flag); 2751556Srgrimes argbackq = argbackq->next; 2761556Srgrimes break; 2771556Srgrimes case CTLENDARI: 2781556Srgrimes expari(flag); 2791556Srgrimes break; 2801556Srgrimes case ':': 2811556Srgrimes case '=': 2821556Srgrimes /* 2831556Srgrimes * sort of a hack - expand tildes in variable 2841556Srgrimes * assignments (after the first '=' and after ':'s). 2851556Srgrimes */ 286215783Sjilles USTPUTC(c, expdest); 287214512Sjilles if (split_lit && !lit_quoted) 288214512Sjilles recordregion(expdest - stackblock() - 1, 289214512Sjilles expdest - stackblock(), 0); 290214512Sjilles if (flag & EXP_VARTILDE && *p == '~' && 291214512Sjilles (c != '=' || firsteq)) { 292214512Sjilles if (c == '=') 293214512Sjilles firsteq = 0; 2941556Srgrimes p = exptilde(p, flag); 2951556Srgrimes } 2961556Srgrimes break; 2971556Srgrimes default: 298215783Sjilles USTPUTC(c, expdest); 299214512Sjilles if (split_lit && !lit_quoted) 300214512Sjilles recordregion(expdest - stackblock() - 1, 301214512Sjilles expdest - stackblock(), 0); 3021556Srgrimes } 3031556Srgrimes } 3041556Srgrimesbreakloop:; 3051556Srgrimes} 3061556Srgrimes 307212243Sjilles/* 308212243Sjilles * Perform tilde expansion, placing the result in the stack string and 309212243Sjilles * returning the next position in the input string to process. 310212243Sjilles */ 311213811Sobrienstatic char * 31290111Simpexptilde(char *p, int flag) 31317987Speter{ 3141556Srgrimes char c, *startp = p; 3151556Srgrimes struct passwd *pw; 3161556Srgrimes char *home; 317108935Stjr int quotes = flag & (EXP_FULL | EXP_CASE | EXP_REDIR); 3181556Srgrimes 31917987Speter while ((c = *p) != '\0') { 3201556Srgrimes switch(c) { 321200988Sjilles case CTLESC: /* This means CTL* are always considered quoted. */ 322200988Sjilles case CTLVAR: 323200988Sjilles case CTLBACKQ: 324200988Sjilles case CTLBACKQ | CTLQUOTE: 325200988Sjilles case CTLARI: 326200988Sjilles case CTLENDARI: 32739137Stegge case CTLQUOTEMARK: 32839137Stegge return (startp); 3291556Srgrimes case ':': 3301556Srgrimes if (flag & EXP_VARTILDE) 3311556Srgrimes goto done; 3321556Srgrimes break; 3331556Srgrimes case '/': 334206150Sjilles case CTLENDVAR: 3351556Srgrimes goto done; 3361556Srgrimes } 3371556Srgrimes p++; 3381556Srgrimes } 3391556Srgrimesdone: 3401556Srgrimes *p = '\0'; 3411556Srgrimes if (*(startp+1) == '\0') { 3421556Srgrimes if ((home = lookupvar("HOME")) == NULL) 3431556Srgrimes goto lose; 3441556Srgrimes } else { 3451556Srgrimes if ((pw = getpwnam(startp+1)) == NULL) 3461556Srgrimes goto lose; 3471556Srgrimes home = pw->pw_dir; 3481556Srgrimes } 3491556Srgrimes if (*home == '\0') 3501556Srgrimes goto lose; 3511556Srgrimes *p = c; 352216384Sjilles if (quotes) 353216384Sjilles STPUTS_QUOTES(home, SQSYNTAX, expdest); 354216384Sjilles else 355216384Sjilles STPUTS(home, expdest); 3561556Srgrimes return (p); 3571556Srgrimeslose: 3581556Srgrimes *p = c; 3591556Srgrimes return (startp); 3601556Srgrimes} 3611556Srgrimes 3621556Srgrimes 363213811Sobrienstatic void 36490111Simpremoverecordregions(int endoff) 36538887Stegge{ 36638887Stegge if (ifslastp == NULL) 36738887Stegge return; 36838887Stegge 36938887Stegge if (ifsfirst.endoff > endoff) { 37038887Stegge while (ifsfirst.next != NULL) { 37138887Stegge struct ifsregion *ifsp; 37238887Stegge INTOFF; 37338887Stegge ifsp = ifsfirst.next->next; 37438887Stegge ckfree(ifsfirst.next); 37538887Stegge ifsfirst.next = ifsp; 37638887Stegge INTON; 37738887Stegge } 37838887Stegge if (ifsfirst.begoff > endoff) 37938887Stegge ifslastp = NULL; 38038887Stegge else { 38138887Stegge ifslastp = &ifsfirst; 38238887Stegge ifsfirst.endoff = endoff; 38338887Stegge } 38438887Stegge return; 38538887Stegge } 386155301Sschweikh 38738887Stegge ifslastp = &ifsfirst; 38838887Stegge while (ifslastp->next && ifslastp->next->begoff < endoff) 38938887Stegge ifslastp=ifslastp->next; 39038887Stegge while (ifslastp->next != NULL) { 39138887Stegge struct ifsregion *ifsp; 39238887Stegge INTOFF; 39338887Stegge ifsp = ifslastp->next->next; 39438887Stegge ckfree(ifslastp->next); 39538887Stegge ifslastp->next = ifsp; 39638887Stegge INTON; 39738887Stegge } 39838887Stegge if (ifslastp->endoff > endoff) 39938887Stegge ifslastp->endoff = endoff; 40038887Stegge} 40138887Stegge 4021556Srgrimes/* 4031556Srgrimes * Expand arithmetic expression. Backup to start of expression, 4041556Srgrimes * evaluate, place result in (backed up) result, adjust string position. 4051556Srgrimes */ 4061556Srgrimesvoid 40790111Simpexpari(int flag) 40817987Speter{ 409207206Sjilles char *p, *q, *start; 410178631Sstefanf arith_t result; 41138887Stegge int begoff; 412108935Stjr int quotes = flag & (EXP_FULL | EXP_CASE | EXP_REDIR); 41338887Stegge int quoted; 4141556Srgrimes 4151556Srgrimes /* 41646684Skris * This routine is slightly over-complicated for 4171556Srgrimes * efficiency. First we make sure there is 4181556Srgrimes * enough space for the result, which may be bigger 419212243Sjilles * than the expression. Next we 4201556Srgrimes * scan backwards looking for the start of arithmetic. If the 4211556Srgrimes * next previous character is a CTLESC character, then we 4221556Srgrimes * have to rescan starting from the beginning since CTLESC 4238855Srgrimes * characters have to be processed left to right. 4241556Srgrimes */ 425178631Sstefanf CHECKSTRSPACE(DIGITS(result) - 2, expdest); 4268855Srgrimes USTPUTC('\0', expdest); 4271556Srgrimes start = stackblock(); 42883676Stegge p = expdest - 2; 42983676Stegge while (p >= start && *p != CTLARI) 4301556Srgrimes --p; 43183676Stegge if (p < start || *p != CTLARI) 4321556Srgrimes error("missing CTLARI (shouldn't happen)"); 43383676Stegge if (p > start && *(p - 1) == CTLESC) 4341556Srgrimes for (p = start; *p != CTLARI; p++) 4351556Srgrimes if (*p == CTLESC) 4361556Srgrimes p++; 43738887Stegge 43838887Stegge if (p[1] == '"') 43938887Stegge quoted=1; 44038887Stegge else 44138887Stegge quoted=0; 44238887Stegge begoff = p - start; 44338887Stegge removerecordregions(begoff); 4441556Srgrimes if (quotes) 44538887Stegge rmescapes(p+2); 446207206Sjilles q = grabstackstr(expdest); 44738887Stegge result = arith(p+2); 448207206Sjilles ungrabstackstr(q, expdest); 449178631Sstefanf fmtstr(p, DIGITS(result), ARITH_FORMAT_STR, result); 4501556Srgrimes while (*p++) 4511556Srgrimes ; 45238887Stegge if (quoted == 0) 45338887Stegge recordregion(begoff, p - 1 - start, 0); 4541556Srgrimes result = expdest - p + 1; 4551556Srgrimes STADJUST(-result, expdest); 4561556Srgrimes} 4571556Srgrimes 4581556Srgrimes 4591556Srgrimes/* 460212243Sjilles * Perform command substitution. 4611556Srgrimes */ 462213811Sobrienstatic void 46390111Simpexpbackq(union node *cmd, int quoted, int flag) 46417987Speter{ 4651556Srgrimes struct backcmd in; 4661556Srgrimes int i; 4671556Srgrimes char buf[128]; 4681556Srgrimes char *p; 4691556Srgrimes char *dest = expdest; 4701556Srgrimes struct ifsregion saveifs, *savelastp; 4711556Srgrimes struct nodelist *saveargbackq; 4721556Srgrimes char lastc; 4731556Srgrimes int startloc = dest - stackblock(); 4741556Srgrimes char const *syntax = quoted? DQSYNTAX : BASESYNTAX; 475108935Stjr int quotes = flag & (EXP_FULL | EXP_CASE | EXP_REDIR); 476115424Sfenner int nnl; 4771556Srgrimes 4781556Srgrimes INTOFF; 4791556Srgrimes saveifs = ifsfirst; 4801556Srgrimes savelastp = ifslastp; 4811556Srgrimes saveargbackq = argbackq; 4821556Srgrimes p = grabstackstr(dest); 4831556Srgrimes evalbackcmd(cmd, &in); 4841556Srgrimes ungrabstackstr(p, dest); 4851556Srgrimes ifsfirst = saveifs; 4861556Srgrimes ifslastp = savelastp; 4871556Srgrimes argbackq = saveargbackq; 4881556Srgrimes 4891556Srgrimes p = in.buf; 4901556Srgrimes lastc = '\0'; 491115424Sfenner nnl = 0; 492115424Sfenner /* Don't copy trailing newlines */ 4931556Srgrimes for (;;) { 4941556Srgrimes if (--in.nleft < 0) { 4951556Srgrimes if (in.fd < 0) 4961556Srgrimes break; 4971556Srgrimes while ((i = read(in.fd, buf, sizeof buf)) < 0 && errno == EINTR); 4981556Srgrimes TRACE(("expbackq: read returns %d\n", i)); 4991556Srgrimes if (i <= 0) 5001556Srgrimes break; 5011556Srgrimes p = buf; 5021556Srgrimes in.nleft = i - 1; 5031556Srgrimes } 5041556Srgrimes lastc = *p++; 5051556Srgrimes if (lastc != '\0') { 506115424Sfenner if (lastc == '\n') { 507115424Sfenner nnl++; 508115424Sfenner } else { 509216706Sjilles CHECKSTRSPACE(nnl + 2, dest); 510115424Sfenner while (nnl > 0) { 511115424Sfenner nnl--; 512216706Sjilles USTPUTC('\n', dest); 513115424Sfenner } 514216496Sjilles if (quotes && syntax[(int)lastc] == CCTL) 515216706Sjilles USTPUTC(CTLESC, dest); 516216706Sjilles USTPUTC(lastc, dest); 517115424Sfenner } 5181556Srgrimes } 5191556Srgrimes } 52017987Speter 5211556Srgrimes if (in.fd >= 0) 5221556Srgrimes close(in.fd); 5231556Srgrimes if (in.buf) 5241556Srgrimes ckfree(in.buf); 5251556Srgrimes if (in.jp) 52645916Scracauer exitstatus = waitforjob(in.jp, (int *)NULL); 5271556Srgrimes if (quoted == 0) 5281556Srgrimes recordregion(startloc, dest - stackblock(), 0); 529213775Sjhb TRACE(("expbackq: size=%td: \"%.*s\"\n", 530213775Sjhb ((dest - stackblock()) - startloc), 531213775Sjhb (int)((dest - stackblock()) - startloc), 5321556Srgrimes stackblock() + startloc)); 5331556Srgrimes expdest = dest; 5341556Srgrimes INTON; 5351556Srgrimes} 5361556Srgrimes 5371556Srgrimes 5381556Srgrimes 539213811Sobrienstatic int 54090111Simpsubevalvar(char *p, char *str, int strloc, int subtype, int startloc, 541214524Sjilles int varflags, int quotes) 54217987Speter{ 54317987Speter char *startp; 54417987Speter char *loc = NULL; 54545514Stegge char *q; 54617987Speter int c = 0; 54717987Speter struct nodelist *saveargbackq = argbackq; 54820425Ssteve int amount; 54920425Ssteve 550206150Sjilles argstr(p, (subtype == VSTRIMLEFT || subtype == VSTRIMLEFTMAX || 551206147Sjilles subtype == VSTRIMRIGHT || subtype == VSTRIMRIGHTMAX ? 552206150Sjilles EXP_CASE : 0) | EXP_TILDE); 55317987Speter STACKSTRNUL(expdest); 55417987Speter argbackq = saveargbackq; 55517987Speter startp = stackblock() + startloc; 55620425Ssteve if (str == NULL) 55720425Ssteve str = stackblock() + strloc; 55817987Speter 55917987Speter switch (subtype) { 56017987Speter case VSASSIGN: 56117987Speter setvar(str, startp, 0); 56220425Ssteve amount = startp - expdest; 56320425Ssteve STADJUST(amount, expdest); 56417987Speter varflags &= ~VSNUL; 56517987Speter return 1; 56617987Speter 56717987Speter case VSQUESTION: 56817987Speter if (*p != CTLENDVAR) { 569201366Sjilles outfmt(out2, "%s\n", startp); 57017987Speter error((char *)NULL); 57117987Speter } 572112254Sru error("%.*s: parameter %snot set", (int)(p - str - 1), 57317987Speter str, (varflags & VSNUL) ? "null or " 57417987Speter : nullstr); 57517987Speter return 0; 57617987Speter 57717987Speter case VSTRIMLEFT: 57825233Ssteve for (loc = startp; loc < str; loc++) { 57917987Speter c = *loc; 58017987Speter *loc = '\0'; 581214524Sjilles if (patmatch(str, startp, quotes)) { 58217987Speter *loc = c; 58317987Speter goto recordleft; 58417987Speter } 58517987Speter *loc = c; 586214524Sjilles if (quotes && *loc == CTLESC) 58745514Stegge loc++; 58817987Speter } 58917987Speter return 0; 59017987Speter 59117987Speter case VSTRIMLEFTMAX: 59245514Stegge for (loc = str - 1; loc >= startp;) { 59317987Speter c = *loc; 59417987Speter *loc = '\0'; 595214524Sjilles if (patmatch(str, startp, quotes)) { 59617987Speter *loc = c; 59717987Speter goto recordleft; 59817987Speter } 59917987Speter *loc = c; 60045514Stegge loc--; 601214524Sjilles if (quotes && loc > startp && *(loc - 1) == CTLESC) { 60245514Stegge for (q = startp; q < loc; q++) 60345514Stegge if (*q == CTLESC) 60445514Stegge q++; 60545514Stegge if (q > loc) 60645514Stegge loc--; 60745514Stegge } 60817987Speter } 60917987Speter return 0; 61017987Speter 61117987Speter case VSTRIMRIGHT: 61245514Stegge for (loc = str - 1; loc >= startp;) { 613214524Sjilles if (patmatch(str, loc, quotes)) { 61420425Ssteve amount = loc - expdest; 61520425Ssteve STADJUST(amount, expdest); 61617987Speter return 1; 61717987Speter } 61845514Stegge loc--; 619214524Sjilles if (quotes && loc > startp && *(loc - 1) == CTLESC) { 62045514Stegge for (q = startp; q < loc; q++) 62145514Stegge if (*q == CTLESC) 62245514Stegge q++; 62345514Stegge if (q > loc) 62445514Stegge loc--; 62545514Stegge } 62617987Speter } 62717987Speter return 0; 62817987Speter 62917987Speter case VSTRIMRIGHTMAX: 63017987Speter for (loc = startp; loc < str - 1; loc++) { 631214524Sjilles if (patmatch(str, loc, quotes)) { 63220425Ssteve amount = loc - expdest; 63320425Ssteve STADJUST(amount, expdest); 63417987Speter return 1; 63517987Speter } 636214524Sjilles if (quotes && *loc == CTLESC) 63745514Stegge loc++; 63817987Speter } 63917987Speter return 0; 64017987Speter 64117987Speter 64217987Speter default: 64317987Speter abort(); 64417987Speter } 64517987Speter 64617987Speterrecordleft: 64720425Ssteve amount = ((str - 1) - (loc - startp)) - expdest; 64820425Ssteve STADJUST(amount, expdest); 64917987Speter while (loc != str - 1) 65017987Speter *startp++ = *loc++; 65117987Speter return 1; 65217987Speter} 65317987Speter 65417987Speter 6551556Srgrimes/* 6561556Srgrimes * Expand a variable, and return a pointer to the next character in the 6571556Srgrimes * input string. 6581556Srgrimes */ 6591556Srgrimes 660213811Sobrienstatic char * 66190111Simpevalvar(char *p, int flag) 66217987Speter{ 6631556Srgrimes int subtype; 6641556Srgrimes int varflags; 6651556Srgrimes char *var; 6661556Srgrimes char *val; 66745644Stegge int patloc; 6681556Srgrimes int c; 6691556Srgrimes int set; 6701556Srgrimes int special; 6711556Srgrimes int startloc; 67217987Speter int varlen; 673221602Sjilles int varlenb; 67417987Speter int easy; 675108935Stjr int quotes = flag & (EXP_FULL | EXP_CASE | EXP_REDIR); 6761556Srgrimes 677164081Sstefanf varflags = (unsigned char)*p++; 6781556Srgrimes subtype = varflags & VSTYPE; 6791556Srgrimes var = p; 6801556Srgrimes special = 0; 6811556Srgrimes if (! is_name(*p)) 6821556Srgrimes special = 1; 6831556Srgrimes p = strchr(p, '=') + 1; 6841556Srgrimesagain: /* jump here after setting a variable with ${var=text} */ 685179022Sstefanf if (varflags & VSLINENO) { 686179022Sstefanf set = 1; 687179022Sstefanf special = 0; 688179022Sstefanf val = var; 689179022Sstefanf p[-1] = '\0'; /* temporarily overwrite '=' to have \0 690179022Sstefanf terminated string */ 691179022Sstefanf } else if (special) { 69225233Ssteve set = varisset(var, varflags & VSNUL); 6931556Srgrimes val = NULL; 6941556Srgrimes } else { 69560592Scracauer val = bltinlookup(var, 1); 69617987Speter if (val == NULL || ((varflags & VSNUL) && val[0] == '\0')) { 6971556Srgrimes val = NULL; 6981556Srgrimes set = 0; 6991556Srgrimes } else 7001556Srgrimes set = 1; 7011556Srgrimes } 70217987Speter varlen = 0; 7031556Srgrimes startloc = expdest - stackblock(); 704198454Sjilles if (!set && uflag && *var != '@' && *var != '*') { 70596939Stjr switch (subtype) { 70696939Stjr case VSNORMAL: 70796939Stjr case VSTRIMLEFT: 70896939Stjr case VSTRIMLEFTMAX: 70996939Stjr case VSTRIMRIGHT: 71096939Stjr case VSTRIMRIGHTMAX: 71196939Stjr case VSLENGTH: 712112254Sru error("%.*s: parameter not set", (int)(p - var - 1), 713112254Sru var); 71496939Stjr } 71596939Stjr } 7161556Srgrimes if (set && subtype != VSPLUS) { 7171556Srgrimes /* insert the value of the variable */ 7181556Srgrimes if (special) { 719164081Sstefanf varvalue(var, varflags & VSQUOTE, subtype, flag); 72017987Speter if (subtype == VSLENGTH) { 721221602Sjilles varlenb = expdest - stackblock() - startloc; 722221602Sjilles varlen = varlenb; 723221602Sjilles if (localeisutf8) { 724221602Sjilles val = stackblock() + startloc; 725221602Sjilles for (;val != expdest; val++) 726221602Sjilles if ((*val & 0xC0) == 0x80) 727221602Sjilles varlen--; 728221602Sjilles } 729221602Sjilles STADJUST(-varlenb, expdest); 73017987Speter } 7311556Srgrimes } else { 73220425Ssteve char const *syntax = (varflags & VSQUOTE) ? DQSYNTAX 73317987Speter : BASESYNTAX; 7341556Srgrimes 73517987Speter if (subtype == VSLENGTH) { 73617987Speter for (;*val; val++) 737221602Sjilles if (!localeisutf8 || 738221602Sjilles (*val & 0xC0) != 0x80) 739221602Sjilles varlen++; 7401556Srgrimes } 74117987Speter else { 742216384Sjilles if (quotes) 743216384Sjilles STPUTS_QUOTES(val, syntax, expdest); 744216384Sjilles else 745216384Sjilles STPUTS(val, expdest); 74617987Speter 74717987Speter } 7481556Srgrimes } 7491556Srgrimes } 75020425Ssteve 7511556Srgrimes if (subtype == VSPLUS) 7521556Srgrimes set = ! set; 75317987Speter 75420425Ssteve easy = ((varflags & VSQUOTE) == 0 || 75517987Speter (*var == '@' && shellparam.nparam != 1)); 75617987Speter 75717987Speter 75817987Speter switch (subtype) { 75917987Speter case VSLENGTH: 76017987Speter expdest = cvtnum(varlen, expdest); 76117987Speter goto record; 76217987Speter 76317987Speter case VSNORMAL: 76417987Speter if (!easy) 76517987Speter break; 76617987Speterrecord: 76720425Ssteve recordregion(startloc, expdest - stackblock(), 768222361Sjilles varflags & VSQUOTE || (ifsset() && ifsval()[0] == '\0' && 769222361Sjilles (*var == '@' || *var == '*'))); 77017987Speter break; 77117987Speter 77217987Speter case VSPLUS: 77317987Speter case VSMINUS: 77417987Speter if (!set) { 775214512Sjilles argstr(p, flag | (flag & EXP_FULL ? EXP_SPLIT_LIT : 0) | 776214512Sjilles (varflags & VSQUOTE ? EXP_LIT_QUOTED : 0)); 77717987Speter break; 77817987Speter } 77917987Speter if (easy) 78017987Speter goto record; 78117987Speter break; 78217987Speter 78317987Speter case VSTRIMLEFT: 78417987Speter case VSTRIMLEFTMAX: 78517987Speter case VSTRIMRIGHT: 78617987Speter case VSTRIMRIGHTMAX: 78717987Speter if (!set) 78817987Speter break; 78917987Speter /* 79017987Speter * Terminate the string and start recording the pattern 79117987Speter * right after it 79217987Speter */ 79317987Speter STPUTC('\0', expdest); 79445644Stegge patloc = expdest - stackblock(); 79545644Stegge if (subevalvar(p, NULL, patloc, subtype, 796214524Sjilles startloc, varflags, quotes) == 0) { 79745644Stegge int amount = (expdest - stackblock() - patloc) + 1; 79825233Ssteve STADJUST(-amount, expdest); 79925233Ssteve } 80038887Stegge /* Remove any recorded regions beyond start of variable */ 80138887Stegge removerecordregions(startloc); 80238887Stegge goto record; 80317987Speter 80417987Speter case VSASSIGN: 80517987Speter case VSQUESTION: 80617987Speter if (!set) { 807214524Sjilles if (subevalvar(p, var, 0, subtype, startloc, varflags, 808214524Sjilles quotes)) { 80920425Ssteve varflags &= ~VSNUL; 810155301Sschweikh /* 811155301Sschweikh * Remove any recorded regions beyond 812155301Sschweikh * start of variable 81338887Stegge */ 81438887Stegge removerecordregions(startloc); 8151556Srgrimes goto again; 81620425Ssteve } 81717987Speter break; 8181556Srgrimes } 81917987Speter if (easy) 82017987Speter goto record; 82117987Speter break; 82217987Speter 823164003Sstefanf case VSERROR: 824164003Sstefanf c = p - var - 1; 825164003Sstefanf error("${%.*s%s}: Bad substitution", c, var, 826164003Sstefanf (c > 0 && *p != CTLENDVAR) ? "..." : ""); 827164003Sstefanf 82817987Speter default: 82917987Speter abort(); 8301556Srgrimes } 831179022Sstefanf p[-1] = '='; /* recover overwritten '=' */ 83217987Speter 8331556Srgrimes if (subtype != VSNORMAL) { /* skip to end of alternative */ 8341556Srgrimes int nesting = 1; 8351556Srgrimes for (;;) { 8361556Srgrimes if ((c = *p++) == CTLESC) 8371556Srgrimes p++; 8381556Srgrimes else if (c == CTLBACKQ || c == (CTLBACKQ|CTLQUOTE)) { 8391556Srgrimes if (set) 8401556Srgrimes argbackq = argbackq->next; 8411556Srgrimes } else if (c == CTLVAR) { 8421556Srgrimes if ((*p++ & VSTYPE) != VSNORMAL) 8431556Srgrimes nesting++; 8441556Srgrimes } else if (c == CTLENDVAR) { 8451556Srgrimes if (--nesting == 0) 8461556Srgrimes break; 8471556Srgrimes } 8481556Srgrimes } 8491556Srgrimes } 8501556Srgrimes return p; 8511556Srgrimes} 8521556Srgrimes 8531556Srgrimes 8541556Srgrimes 8551556Srgrimes/* 8561556Srgrimes * Test whether a specialized variable is set. 8571556Srgrimes */ 8581556Srgrimes 859213811Sobrienstatic int 86090111Simpvarisset(char *name, int nulok) 86125233Ssteve{ 8621556Srgrimes 86325233Ssteve if (*name == '!') 864209600Sjilles return backgndpidset(); 86525233Ssteve else if (*name == '@' || *name == '*') { 8661556Srgrimes if (*shellparam.p == NULL) 8671556Srgrimes return 0; 86825233Ssteve 86925233Ssteve if (nulok) { 87025233Ssteve char **av; 87125233Ssteve 87225233Ssteve for (av = shellparam.p; *av; av++) 87325233Ssteve if (**av != '\0') 87425233Ssteve return 1; 87525233Ssteve return 0; 87625233Ssteve } 87718202Speter } else if (is_digit(*name)) { 87825233Ssteve char *ap; 87920425Ssteve int num = atoi(name); 88025233Ssteve 88125233Ssteve if (num > shellparam.nparam) 88225233Ssteve return 0; 88325233Ssteve 88425233Ssteve if (num == 0) 88525233Ssteve ap = arg0; 88625233Ssteve else 88725233Ssteve ap = shellparam.p[num - 1]; 88825233Ssteve 88925233Ssteve if (nulok && (ap == NULL || *ap == '\0')) 89025233Ssteve return 0; 8911556Srgrimes } 8921556Srgrimes return 1; 8931556Srgrimes} 8941556Srgrimes 895216384Sjillesstatic void 896216384Sjillesstrtodest(const char *p, int flag, int subtype, int quoted) 897216384Sjilles{ 898216384Sjilles if (flag & (EXP_FULL | EXP_CASE) && subtype != VSLENGTH) 899216384Sjilles STPUTS_QUOTES(p, quoted ? DQSYNTAX : BASESYNTAX, expdest); 900216384Sjilles else 901216384Sjilles STPUTS(p, expdest); 902216384Sjilles} 9031556Srgrimes 9041556Srgrimes/* 9051556Srgrimes * Add the value of a specialized variable to the stack string. 9061556Srgrimes */ 9071556Srgrimes 908213811Sobrienstatic void 909164081Sstefanfvarvalue(char *name, int quoted, int subtype, int flag) 91017987Speter{ 9111556Srgrimes int num; 9121556Srgrimes char *p; 9131556Srgrimes int i; 9141556Srgrimes char sep; 9151556Srgrimes char **ap; 9161556Srgrimes 91718202Speter switch (*name) { 9181556Srgrimes case '$': 9191556Srgrimes num = rootpid; 9201556Srgrimes goto numvar; 9211556Srgrimes case '?': 92217987Speter num = oexitstatus; 9231556Srgrimes goto numvar; 9241556Srgrimes case '#': 9251556Srgrimes num = shellparam.nparam; 9261556Srgrimes goto numvar; 9271556Srgrimes case '!': 928209600Sjilles num = backgndpidval(); 9291556Srgrimesnumvar: 93017987Speter expdest = cvtnum(num, expdest); 9311556Srgrimes break; 9321556Srgrimes case '-': 9331556Srgrimes for (i = 0 ; i < NOPTS ; i++) { 9341556Srgrimes if (optlist[i].val) 9351556Srgrimes STPUTC(optlist[i].letter, expdest); 9361556Srgrimes } 9371556Srgrimes break; 9381556Srgrimes case '@': 939164081Sstefanf if (flag & EXP_FULL && quoted) { 94038887Stegge for (ap = shellparam.p ; (p = *ap++) != NULL ; ) { 941216384Sjilles strtodest(p, flag, subtype, quoted); 94238887Stegge if (*ap) 94338887Stegge STPUTC('\0', expdest); 94438887Stegge } 94538887Stegge break; 9461556Srgrimes } 947102410Scharnier /* FALLTHROUGH */ 9481556Srgrimes case '*': 949149825Srse if (ifsset()) 95038887Stegge sep = ifsval()[0]; 95138887Stegge else 95238887Stegge sep = ' '; 9531556Srgrimes for (ap = shellparam.p ; (p = *ap++) != NULL ; ) { 954216384Sjilles strtodest(p, flag, subtype, quoted); 955222361Sjilles if (!*ap) 956222361Sjilles break; 957222361Sjilles if (sep || (flag & EXP_FULL && !quoted && **ap != '\0')) 9581556Srgrimes STPUTC(sep, expdest); 9591556Srgrimes } 9601556Srgrimes break; 9611556Srgrimes case '0': 9621556Srgrimes p = arg0; 963216384Sjilles strtodest(p, flag, subtype, quoted); 9641556Srgrimes break; 9651556Srgrimes default: 96618202Speter if (is_digit(*name)) { 96718202Speter num = atoi(name); 96818202Speter if (num > 0 && num <= shellparam.nparam) { 96918202Speter p = shellparam.p[num - 1]; 970216384Sjilles strtodest(p, flag, subtype, quoted); 97118202Speter } 9721556Srgrimes } 9731556Srgrimes break; 9741556Srgrimes } 9751556Srgrimes} 9761556Srgrimes 9771556Srgrimes 9781556Srgrimes 9791556Srgrimes/* 980218909Sbrucec * Record the fact that we have to scan this region of the 9811556Srgrimes * string for IFS characters. 9821556Srgrimes */ 9831556Srgrimes 984213811Sobrienstatic void 985194975Sjillesrecordregion(int start, int end, int inquotes) 98617987Speter{ 98725233Ssteve struct ifsregion *ifsp; 9881556Srgrimes 989264629Sjilles INTOFF; 9901556Srgrimes if (ifslastp == NULL) { 9911556Srgrimes ifsp = &ifsfirst; 9921556Srgrimes } else { 993194975Sjilles if (ifslastp->endoff == start 994194975Sjilles && ifslastp->inquotes == inquotes) { 995194975Sjilles /* extend previous area */ 996194975Sjilles ifslastp->endoff = end; 997264629Sjilles INTON; 998194975Sjilles return; 999194975Sjilles } 10001556Srgrimes ifsp = (struct ifsregion *)ckmalloc(sizeof (struct ifsregion)); 10011556Srgrimes ifslastp->next = ifsp; 10021556Srgrimes } 10031556Srgrimes ifslastp = ifsp; 10041556Srgrimes ifslastp->next = NULL; 10051556Srgrimes ifslastp->begoff = start; 10061556Srgrimes ifslastp->endoff = end; 1007194975Sjilles ifslastp->inquotes = inquotes; 1008264629Sjilles INTON; 10091556Srgrimes} 10101556Srgrimes 10111556Srgrimes 10121556Srgrimes 10131556Srgrimes/* 10141556Srgrimes * Break the argument string into pieces based upon IFS and add the 10151556Srgrimes * strings to the argument list. The regions of the string to be 10161556Srgrimes * searched for IFS characters have been stored by recordregion. 1017212243Sjilles * CTLESC characters are preserved but have little effect in this pass 1018212243Sjilles * other than escaping CTL* characters. In particular, they do not escape 1019212243Sjilles * IFS characters: that should be done with the ifsregion mechanism. 1020212243Sjilles * CTLQUOTEMARK characters are used to preserve empty quoted strings. 1021212243Sjilles * This pass treats them as a regular character, making the string non-empty. 1022212243Sjilles * Later, they are removed along with the other CTL* characters. 10231556Srgrimes */ 1024213811Sobrienstatic void 102590111Simpifsbreakup(char *string, struct arglist *arglist) 102690111Simp{ 10271556Srgrimes struct ifsregion *ifsp; 10281556Srgrimes struct strlist *sp; 10291556Srgrimes char *start; 103025233Ssteve char *p; 10311556Srgrimes char *q; 1032201053Sjilles const char *ifs; 1033194975Sjilles const char *ifsspc; 1034194975Sjilles int had_param_ch = 0; 10351556Srgrimes 1036194975Sjilles start = string; 103717987Speter 1038194975Sjilles if (ifslastp == NULL) { 1039194975Sjilles /* Return entire argument, IFS doesn't apply to any of it */ 1040194975Sjilles sp = (struct strlist *)stalloc(sizeof *sp); 1041194975Sjilles sp->text = start; 1042194975Sjilles *arglist->lastp = sp; 1043194975Sjilles arglist->lastp = &sp->next; 1044194975Sjilles return; 1045194975Sjilles } 1046194975Sjilles 1047194975Sjilles ifs = ifsset() ? ifsval() : " \t\n"; 1048194975Sjilles 1049194975Sjilles for (ifsp = &ifsfirst; ifsp != NULL; ifsp = ifsp->next) { 1050194975Sjilles p = string + ifsp->begoff; 1051194975Sjilles while (p < string + ifsp->endoff) { 1052194975Sjilles q = p; 1053194975Sjilles if (*p == CTLESC) 1054194975Sjilles p++; 1055194975Sjilles if (ifsp->inquotes) { 1056194975Sjilles /* Only NULs (should be from "$@") end args */ 1057194977Sjilles had_param_ch = 1; 1058194975Sjilles if (*p != 0) { 10591556Srgrimes p++; 1060194975Sjilles continue; 1061194975Sjilles } 1062194975Sjilles ifsspc = NULL; 1063194975Sjilles } else { 1064194975Sjilles if (!strchr(ifs, *p)) { 1065194977Sjilles had_param_ch = 1; 106638887Stegge p++; 1067194975Sjilles continue; 1068194975Sjilles } 1069194975Sjilles ifsspc = strchr(" \t\n", *p); 1070194975Sjilles 1071194975Sjilles /* Ignore IFS whitespace at start */ 1072194975Sjilles if (q == start && ifsspc != NULL) { 1073194975Sjilles p++; 10741556Srgrimes start = p; 1075194975Sjilles continue; 1076194975Sjilles } 1077194977Sjilles had_param_ch = 0; 10781556Srgrimes } 1079194975Sjilles 1080194975Sjilles /* Save this argument... */ 1081194975Sjilles *q = '\0'; 10821556Srgrimes sp = (struct strlist *)stalloc(sizeof *sp); 10831556Srgrimes sp->text = start; 10841556Srgrimes *arglist->lastp = sp; 10851556Srgrimes arglist->lastp = &sp->next; 1086194975Sjilles p++; 1087194975Sjilles 1088194975Sjilles if (ifsspc != NULL) { 1089194975Sjilles /* Ignore further trailing IFS whitespace */ 1090194975Sjilles for (; p < string + ifsp->endoff; p++) { 1091194975Sjilles q = p; 1092194975Sjilles if (*p == CTLESC) 1093194975Sjilles p++; 1094194975Sjilles if (strchr(ifs, *p) == NULL) { 1095194975Sjilles p = q; 1096194975Sjilles break; 1097194975Sjilles } 1098194975Sjilles if (strchr(" \t\n", *p) == NULL) { 1099194975Sjilles p++; 1100194975Sjilles break; 1101194975Sjilles } 1102194975Sjilles } 1103194975Sjilles } 1104194975Sjilles start = p; 11051556Srgrimes } 1106194975Sjilles } 1107194975Sjilles 1108194975Sjilles /* 1109194975Sjilles * Save anything left as an argument. 1110194975Sjilles * Traditionally we have treated 'IFS=':'; set -- x$IFS' as 1111194975Sjilles * generating 2 arguments, the second of which is empty. 1112194975Sjilles * Some recent clarification of the Posix spec say that it 1113194975Sjilles * should only generate one.... 1114194975Sjilles */ 1115194975Sjilles if (had_param_ch || *start != 0) { 11161556Srgrimes sp = (struct strlist *)stalloc(sizeof *sp); 11171556Srgrimes sp->text = start; 11181556Srgrimes *arglist->lastp = sp; 11191556Srgrimes arglist->lastp = &sp->next; 11201556Srgrimes } 11211556Srgrimes} 11221556Srgrimes 11231556Srgrimes 1124213760Sobrienstatic char expdir[PATH_MAX]; 1125212243Sjilles#define expdir_end (expdir + sizeof(expdir)) 11261556Srgrimes 11271556Srgrimes/* 1128212243Sjilles * Perform pathname generation and remove control characters. 1129212243Sjilles * At this point, the only control characters should be CTLESC and CTLQUOTEMARK. 1130212243Sjilles * The results are stored in the list exparg. 11311556Srgrimes */ 1132213811Sobrienstatic void 113390111Simpexpandmeta(struct strlist *str, int flag __unused) 113417987Speter{ 11351556Srgrimes char *p; 11361556Srgrimes struct strlist **savelastp; 11371556Srgrimes struct strlist *sp; 11381556Srgrimes char c; 11391556Srgrimes /* TODO - EXP_REDIR */ 11401556Srgrimes 11411556Srgrimes while (str) { 11421556Srgrimes if (fflag) 11431556Srgrimes goto nometa; 11441556Srgrimes p = str->text; 11451556Srgrimes for (;;) { /* fast check for meta chars */ 11461556Srgrimes if ((c = *p++) == '\0') 11471556Srgrimes goto nometa; 1148211646Sjilles if (c == '*' || c == '?' || c == '[') 11491556Srgrimes break; 11501556Srgrimes } 11511556Srgrimes savelastp = exparg.lastp; 11521556Srgrimes INTOFF; 11531556Srgrimes expmeta(expdir, str->text); 11541556Srgrimes INTON; 11551556Srgrimes if (exparg.lastp == savelastp) { 11568855Srgrimes /* 11578855Srgrimes * no matches 11581556Srgrimes */ 11591556Srgrimesnometa: 11601556Srgrimes *exparg.lastp = str; 11611556Srgrimes rmescapes(str->text); 11621556Srgrimes exparg.lastp = &str->next; 11631556Srgrimes } else { 11641556Srgrimes *exparg.lastp = NULL; 11651556Srgrimes *savelastp = sp = expsort(*savelastp); 11661556Srgrimes while (sp->next != NULL) 11671556Srgrimes sp = sp->next; 11681556Srgrimes exparg.lastp = &sp->next; 11691556Srgrimes } 11701556Srgrimes str = str->next; 11711556Srgrimes } 11721556Srgrimes} 11731556Srgrimes 11741556Srgrimes 11751556Srgrimes/* 11761556Srgrimes * Do metacharacter (i.e. *, ?, [...]) expansion. 11771556Srgrimes */ 11781556Srgrimes 1179213811Sobrienstatic void 118090111Simpexpmeta(char *enddir, char *name) 118190111Simp{ 118225233Ssteve char *p; 11831556Srgrimes char *q; 11841556Srgrimes char *start; 11851556Srgrimes char *endname; 11861556Srgrimes int metaflag; 11871556Srgrimes struct stat statb; 11881556Srgrimes DIR *dirp; 11891556Srgrimes struct dirent *dp; 11901556Srgrimes int atend; 11911556Srgrimes int matchdot; 1192207944Sjilles int esc; 11931556Srgrimes 11941556Srgrimes metaflag = 0; 11951556Srgrimes start = name; 1196207944Sjilles for (p = name; esc = 0, *p; p += esc + 1) { 11971556Srgrimes if (*p == '*' || *p == '?') 11981556Srgrimes metaflag = 1; 11991556Srgrimes else if (*p == '[') { 12001556Srgrimes q = p + 1; 120126488Sache if (*q == '!' || *q == '^') 12021556Srgrimes q++; 12031556Srgrimes for (;;) { 120438887Stegge while (*q == CTLQUOTEMARK) 120538887Stegge q++; 12061556Srgrimes if (*q == CTLESC) 12071556Srgrimes q++; 12081556Srgrimes if (*q == '/' || *q == '\0') 12091556Srgrimes break; 12101556Srgrimes if (*++q == ']') { 12111556Srgrimes metaflag = 1; 12121556Srgrimes break; 12131556Srgrimes } 12141556Srgrimes } 12151556Srgrimes } else if (*p == '\0') 12161556Srgrimes break; 121738887Stegge else if (*p == CTLQUOTEMARK) 121838887Stegge continue; 1219207944Sjilles else { 1220207944Sjilles if (*p == CTLESC) 1221207944Sjilles esc++; 1222207944Sjilles if (p[esc] == '/') { 1223207944Sjilles if (metaflag) 1224207944Sjilles break; 1225207944Sjilles start = p + esc + 1; 1226207944Sjilles } 12271556Srgrimes } 12281556Srgrimes } 12291556Srgrimes if (metaflag == 0) { /* we've reached the end of the file name */ 12301556Srgrimes if (enddir != expdir) 12311556Srgrimes metaflag++; 12321556Srgrimes for (p = name ; ; p++) { 123338887Stegge if (*p == CTLQUOTEMARK) 123438887Stegge continue; 12351556Srgrimes if (*p == CTLESC) 12361556Srgrimes p++; 12371556Srgrimes *enddir++ = *p; 12381556Srgrimes if (*p == '\0') 12391556Srgrimes break; 1240211155Sjilles if (enddir == expdir_end) 1241211155Sjilles return; 12421556Srgrimes } 1243147812Sdelphij if (metaflag == 0 || lstat(expdir, &statb) >= 0) 12441556Srgrimes addfname(expdir); 12451556Srgrimes return; 12461556Srgrimes } 12471556Srgrimes endname = p; 12481556Srgrimes if (start != name) { 12491556Srgrimes p = name; 12501556Srgrimes while (p < start) { 125138887Stegge while (*p == CTLQUOTEMARK) 125238887Stegge p++; 12531556Srgrimes if (*p == CTLESC) 12541556Srgrimes p++; 12551556Srgrimes *enddir++ = *p++; 1256211155Sjilles if (enddir == expdir_end) 1257211155Sjilles return; 12581556Srgrimes } 12591556Srgrimes } 12601556Srgrimes if (enddir == expdir) { 12611556Srgrimes p = "."; 12621556Srgrimes } else if (enddir == expdir + 1 && *expdir == '/') { 12631556Srgrimes p = "/"; 12641556Srgrimes } else { 12651556Srgrimes p = expdir; 12661556Srgrimes enddir[-1] = '\0'; 12671556Srgrimes } 12681556Srgrimes if ((dirp = opendir(p)) == NULL) 12691556Srgrimes return; 12701556Srgrimes if (enddir != expdir) 12711556Srgrimes enddir[-1] = '/'; 12721556Srgrimes if (*endname == 0) { 12731556Srgrimes atend = 1; 12741556Srgrimes } else { 12751556Srgrimes atend = 0; 1276207944Sjilles *endname = '\0'; 1277207944Sjilles endname += esc + 1; 12781556Srgrimes } 12791556Srgrimes matchdot = 0; 128038887Stegge p = start; 128138887Stegge while (*p == CTLQUOTEMARK) 128238887Stegge p++; 128338887Stegge if (*p == CTLESC) 128438887Stegge p++; 128538887Stegge if (*p == '.') 12861556Srgrimes matchdot++; 12871556Srgrimes while (! int_pending() && (dp = readdir(dirp)) != NULL) { 12881556Srgrimes if (dp->d_name[0] == '.' && ! matchdot) 12891556Srgrimes continue; 129045514Stegge if (patmatch(start, dp->d_name, 0)) { 1291211155Sjilles if (enddir + dp->d_namlen + 1 > expdir_end) 1292211155Sjilles continue; 1293211155Sjilles memcpy(enddir, dp->d_name, dp->d_namlen + 1); 1294211155Sjilles if (atend) 12951556Srgrimes addfname(expdir); 1296211155Sjilles else { 1297211155Sjilles if (enddir + dp->d_namlen + 2 > expdir_end) 129817987Speter continue; 1299211155Sjilles enddir[dp->d_namlen] = '/'; 1300211155Sjilles enddir[dp->d_namlen + 1] = '\0'; 1301211155Sjilles expmeta(enddir + dp->d_namlen + 1, endname); 13021556Srgrimes } 13031556Srgrimes } 13041556Srgrimes } 13051556Srgrimes closedir(dirp); 13061556Srgrimes if (! atend) 1307207944Sjilles endname[-esc - 1] = esc ? CTLESC : '/'; 13081556Srgrimes} 13091556Srgrimes 13101556Srgrimes 13111556Srgrimes/* 13121556Srgrimes * Add a file name to the list. 13131556Srgrimes */ 13141556Srgrimes 1315213811Sobrienstatic void 131690111Simpaddfname(char *name) 131790111Simp{ 13181556Srgrimes char *p; 13191556Srgrimes struct strlist *sp; 13201556Srgrimes 13211556Srgrimes p = stalloc(strlen(name) + 1); 13221556Srgrimes scopy(name, p); 13231556Srgrimes sp = (struct strlist *)stalloc(sizeof *sp); 13241556Srgrimes sp->text = p; 13251556Srgrimes *exparg.lastp = sp; 13261556Srgrimes exparg.lastp = &sp->next; 13271556Srgrimes} 13281556Srgrimes 13291556Srgrimes 13301556Srgrimes/* 13311556Srgrimes * Sort the results of file name expansion. It calculates the number of 13321556Srgrimes * strings to sort and then calls msort (short for merge sort) to do the 13331556Srgrimes * work. 13341556Srgrimes */ 13351556Srgrimes 1336213811Sobrienstatic struct strlist * 133790111Simpexpsort(struct strlist *str) 133890111Simp{ 13391556Srgrimes int len; 13401556Srgrimes struct strlist *sp; 13411556Srgrimes 13421556Srgrimes len = 0; 13431556Srgrimes for (sp = str ; sp ; sp = sp->next) 13441556Srgrimes len++; 13451556Srgrimes return msort(str, len); 13461556Srgrimes} 13471556Srgrimes 13481556Srgrimes 1349213811Sobrienstatic struct strlist * 135090111Simpmsort(struct strlist *list, int len) 135117987Speter{ 135217987Speter struct strlist *p, *q = NULL; 13531556Srgrimes struct strlist **lpp; 13541556Srgrimes int half; 13551556Srgrimes int n; 13561556Srgrimes 13571556Srgrimes if (len <= 1) 13581556Srgrimes return list; 13598855Srgrimes half = len >> 1; 13601556Srgrimes p = list; 13611556Srgrimes for (n = half ; --n >= 0 ; ) { 13621556Srgrimes q = p; 13631556Srgrimes p = p->next; 13641556Srgrimes } 13651556Srgrimes q->next = NULL; /* terminate first half of list */ 13661556Srgrimes q = msort(list, half); /* sort first half of list */ 13671556Srgrimes p = msort(p, len - half); /* sort second half */ 13681556Srgrimes lpp = &list; 13691556Srgrimes for (;;) { 13701556Srgrimes if (strcmp(p->text, q->text) < 0) { 13711556Srgrimes *lpp = p; 13721556Srgrimes lpp = &p->next; 13731556Srgrimes if ((p = *lpp) == NULL) { 13741556Srgrimes *lpp = q; 13751556Srgrimes break; 13761556Srgrimes } 13771556Srgrimes } else { 13781556Srgrimes *lpp = q; 13791556Srgrimes lpp = &q->next; 13801556Srgrimes if ((q = *lpp) == NULL) { 13811556Srgrimes *lpp = p; 13821556Srgrimes break; 13831556Srgrimes } 13841556Srgrimes } 13851556Srgrimes } 13861556Srgrimes return list; 13871556Srgrimes} 13881556Srgrimes 13891556Srgrimes 13901556Srgrimes 1391221646Sjillesstatic wchar_t 1392221646Sjillesget_wc(const char **p) 1393221646Sjilles{ 1394221646Sjilles wchar_t c; 1395221646Sjilles int chrlen; 1396221646Sjilles 1397221646Sjilles chrlen = mbtowc(&c, *p, 4); 1398221646Sjilles if (chrlen == 0) 1399221646Sjilles return 0; 1400221646Sjilles else if (chrlen == -1) 1401221646Sjilles c = 0; 1402221646Sjilles else 1403221646Sjilles *p += chrlen; 1404221646Sjilles return c; 1405221646Sjilles} 1406221646Sjilles 1407221646Sjilles 14081556Srgrimes/* 1409223120Sjilles * See if a character matches a character class, starting at the first colon 1410223120Sjilles * of "[:class:]". 1411223120Sjilles * If a valid character class is recognized, a pointer to the next character 1412223120Sjilles * after the final closing bracket is stored into *end, otherwise a null 1413223120Sjilles * pointer is stored into *end. 1414223120Sjilles */ 1415223120Sjillesstatic int 1416223120Sjillesmatch_charclass(const char *p, wchar_t chr, const char **end) 1417223120Sjilles{ 1418223120Sjilles char name[20]; 1419223120Sjilles const char *nameend; 1420223120Sjilles wctype_t cclass; 1421223120Sjilles 1422223120Sjilles *end = NULL; 1423223120Sjilles p++; 1424223120Sjilles nameend = strstr(p, ":]"); 1425223120Sjilles if (nameend == NULL || nameend - p >= sizeof(name) || nameend == p) 1426223120Sjilles return 0; 1427223120Sjilles memcpy(name, p, nameend - p); 1428223120Sjilles name[nameend - p] = '\0'; 1429223120Sjilles *end = nameend + 2; 1430223120Sjilles cclass = wctype(name); 1431223120Sjilles /* An unknown class matches nothing but is valid nevertheless. */ 1432223120Sjilles if (cclass == 0) 1433223120Sjilles return 0; 1434223120Sjilles return iswctype(chr, cclass); 1435223120Sjilles} 1436223120Sjilles 1437223120Sjilles 1438223120Sjilles/* 14391556Srgrimes * Returns true if the pattern matches the string. 14401556Srgrimes */ 14411556Srgrimes 1442231790Sjillesstatic int 1443200956Sjillespatmatch(const char *pattern, const char *string, int squoted) 144490111Simp{ 1445223120Sjilles const char *p, *q, *end; 1446233289Sjilles const char *bt_p, *bt_q; 144725233Ssteve char c; 1448221646Sjilles wchar_t wc, wc2; 14491556Srgrimes 14501556Srgrimes p = pattern; 14511556Srgrimes q = string; 1452233289Sjilles bt_p = NULL; 1453233289Sjilles bt_q = NULL; 14541556Srgrimes for (;;) { 14551556Srgrimes switch (c = *p++) { 14561556Srgrimes case '\0': 1457233289Sjilles if (*q != '\0') 1458233289Sjilles goto backtrack; 1459233289Sjilles return 1; 14601556Srgrimes case CTLESC: 146145514Stegge if (squoted && *q == CTLESC) 146245514Stegge q++; 14631556Srgrimes if (*q++ != *p++) 1464233289Sjilles goto backtrack; 14651556Srgrimes break; 146638887Stegge case CTLQUOTEMARK: 146738887Stegge continue; 14681556Srgrimes case '?': 146945514Stegge if (squoted && *q == CTLESC) 147045514Stegge q++; 1471233289Sjilles if (*q == '\0') 1472233289Sjilles return 0; 1473233289Sjilles if (localeisutf8) { 1474221646Sjilles wc = get_wc(&q); 1475233289Sjilles /* 1476233289Sjilles * A '?' does not match invalid UTF-8 but a 1477233289Sjilles * '*' does, so backtrack. 1478233289Sjilles */ 1479233289Sjilles if (wc == 0) 1480233289Sjilles goto backtrack; 1481233289Sjilles } else 1482223010Sjilles wc = (unsigned char)*q++; 14831556Srgrimes break; 14841556Srgrimes case '*': 14851556Srgrimes c = *p; 148638887Stegge while (c == CTLQUOTEMARK || c == '*') 148738887Stegge c = *++p; 1488233289Sjilles /* 1489233289Sjilles * If the pattern ends here, we know the string 1490233289Sjilles * matches without needing to look at the rest of it. 1491233289Sjilles */ 1492233289Sjilles if (c == '\0') 1493233289Sjilles return 1; 1494233289Sjilles /* 1495233289Sjilles * First try the shortest match for the '*' that 1496233289Sjilles * could work. We can forget any earlier '*' since 1497233289Sjilles * there is no way having it match more characters 1498233289Sjilles * can help us, given that we are already here. 1499233289Sjilles */ 1500233289Sjilles bt_p = p; 1501233289Sjilles bt_q = q; 1502233289Sjilles break; 15031556Srgrimes case '[': { 1504200956Sjilles const char *endp; 15051556Srgrimes int invert, found; 1506221646Sjilles wchar_t chr; 15071556Srgrimes 15081556Srgrimes endp = p; 150926488Sache if (*endp == '!' || *endp == '^') 15101556Srgrimes endp++; 15111556Srgrimes for (;;) { 151238887Stegge while (*endp == CTLQUOTEMARK) 151338887Stegge endp++; 1514233289Sjilles if (*endp == 0) 15151556Srgrimes goto dft; /* no matching ] */ 15161556Srgrimes if (*endp == CTLESC) 15171556Srgrimes endp++; 15181556Srgrimes if (*++endp == ']') 15191556Srgrimes break; 15201556Srgrimes } 15211556Srgrimes invert = 0; 152226488Sache if (*p == '!' || *p == '^') { 15231556Srgrimes invert++; 15241556Srgrimes p++; 15251556Srgrimes } 15261556Srgrimes found = 0; 1527221646Sjilles if (squoted && *q == CTLESC) 1528221646Sjilles q++; 1529233289Sjilles if (*q == '\0') 1530233289Sjilles return 0; 1531233289Sjilles if (localeisutf8) { 1532221646Sjilles chr = get_wc(&q); 1533233289Sjilles if (chr == 0) 1534233289Sjilles goto backtrack; 1535233289Sjilles } else 1536223010Sjilles chr = (unsigned char)*q++; 15371556Srgrimes c = *p++; 15381556Srgrimes do { 153938887Stegge if (c == CTLQUOTEMARK) 154038887Stegge continue; 1541223120Sjilles if (c == '[' && *p == ':') { 1542223120Sjilles found |= match_charclass(p, chr, &end); 1543223120Sjilles if (end != NULL) 1544223120Sjilles p = end; 1545223120Sjilles } 15461556Srgrimes if (c == CTLESC) 15471556Srgrimes c = *p++; 1548221646Sjilles if (localeisutf8 && c & 0x80) { 1549221646Sjilles p--; 1550221646Sjilles wc = get_wc(&p); 1551221646Sjilles if (wc == 0) /* bad utf-8 */ 1552221646Sjilles return 0; 1553221646Sjilles } else 1554223010Sjilles wc = (unsigned char)c; 15551556Srgrimes if (*p == '-' && p[1] != ']') { 15561556Srgrimes p++; 155738887Stegge while (*p == CTLQUOTEMARK) 155838887Stegge p++; 15591556Srgrimes if (*p == CTLESC) 15601556Srgrimes p++; 1561221646Sjilles if (localeisutf8) { 1562221646Sjilles wc2 = get_wc(&p); 1563221646Sjilles if (wc2 == 0) /* bad utf-8 */ 1564221646Sjilles return 0; 1565221646Sjilles } else 1566223010Sjilles wc2 = (unsigned char)*p++; 1567221646Sjilles if ( collate_range_cmp(chr, wc) >= 0 1568221646Sjilles && collate_range_cmp(chr, wc2) <= 0 156917525Sache ) 15701556Srgrimes found = 1; 15711556Srgrimes } else { 1572221646Sjilles if (chr == wc) 15731556Srgrimes found = 1; 15741556Srgrimes } 15751556Srgrimes } while ((c = *p++) != ']'); 15761556Srgrimes if (found == invert) 1577233289Sjilles goto backtrack; 15781556Srgrimes break; 15791556Srgrimes } 15801556Srgrimesdft: default: 158145514Stegge if (squoted && *q == CTLESC) 158245514Stegge q++; 1583233289Sjilles if (*q == '\0') 15841556Srgrimes return 0; 1585233289Sjilles if (*q++ == c) 1586233289Sjilles break; 1587233289Sjillesbacktrack: 1588233289Sjilles /* 1589233289Sjilles * If we have a mismatch (other than hitting the end 1590233289Sjilles * of the string), go back to the last '*' seen and 1591233289Sjilles * have it match one additional character. 1592233289Sjilles */ 1593233289Sjilles if (bt_p == NULL) 1594233289Sjilles return 0; 1595233289Sjilles if (squoted && *bt_q == CTLESC) 1596233289Sjilles bt_q++; 1597233289Sjilles if (*bt_q == '\0') 1598233289Sjilles return 0; 1599233289Sjilles bt_q++; 1600233289Sjilles p = bt_p; 1601233289Sjilles q = bt_q; 16021556Srgrimes break; 16031556Srgrimes } 16041556Srgrimes } 16051556Srgrimes} 16061556Srgrimes 16071556Srgrimes 16081556Srgrimes 16091556Srgrimes/* 1610212243Sjilles * Remove any CTLESC and CTLQUOTEMARK characters from a string. 16111556Srgrimes */ 16121556Srgrimes 16131556Srgrimesvoid 161490111Simprmescapes(char *str) 161538887Stegge{ 161625233Ssteve char *p, *q; 16171556Srgrimes 16181556Srgrimes p = str; 1619214512Sjilles while (*p != CTLESC && *p != CTLQUOTEMARK && *p != CTLQUOTEEND) { 16201556Srgrimes if (*p++ == '\0') 16211556Srgrimes return; 16221556Srgrimes } 16231556Srgrimes q = p; 16241556Srgrimes while (*p) { 1625214512Sjilles if (*p == CTLQUOTEMARK || *p == CTLQUOTEEND) { 162638887Stegge p++; 162738887Stegge continue; 162838887Stegge } 16291556Srgrimes if (*p == CTLESC) 16301556Srgrimes p++; 16311556Srgrimes *q++ = *p++; 16321556Srgrimes } 16331556Srgrimes *q = '\0'; 16341556Srgrimes} 16351556Srgrimes 16361556Srgrimes 16371556Srgrimes 16381556Srgrimes/* 16391556Srgrimes * See if a pattern matches in a case statement. 16401556Srgrimes */ 16411556Srgrimes 16421556Srgrimesint 1643200956Sjillescasematch(union node *pattern, const char *val) 164490111Simp{ 16451556Srgrimes struct stackmark smark; 16461556Srgrimes int result; 16471556Srgrimes char *p; 16481556Srgrimes 16491556Srgrimes setstackmark(&smark); 16501556Srgrimes argbackq = pattern->narg.backquote; 16511556Srgrimes STARTSTACKSTR(expdest); 16521556Srgrimes ifslastp = NULL; 16531556Srgrimes argstr(pattern->narg.text, EXP_TILDE | EXP_CASE); 16541556Srgrimes STPUTC('\0', expdest); 16551556Srgrimes p = grabstackstr(expdest); 165645514Stegge result = patmatch(p, val, 0); 16571556Srgrimes popstackmark(&smark); 16581556Srgrimes return result; 16591556Srgrimes} 166017987Speter 166117987Speter/* 166217987Speter * Our own itoa(). 166317987Speter */ 166417987Speter 1665213811Sobrienstatic char * 166690111Simpcvtnum(int num, char *buf) 166790111Simp{ 166817987Speter char temp[32]; 166917987Speter int neg = num < 0; 167017987Speter char *p = temp + 31; 167117987Speter 167217987Speter temp[31] = '\0'; 167317987Speter 167417987Speter do { 167517987Speter *--p = num % 10 + '0'; 167617987Speter } while ((num /= 10) != 0); 167717987Speter 167817987Speter if (neg) 167917987Speter *--p = '-'; 168017987Speter 1681215783Sjilles STPUTS(p, buf); 168217987Speter return buf; 168317987Speter} 1684108286Stjr 1685108286Stjr/* 1686108286Stjr * Do most of the work for wordexp(3). 1687108286Stjr */ 1688108286Stjr 1689108286Stjrint 1690108286Stjrwordexpcmd(int argc, char **argv) 1691108286Stjr{ 1692108286Stjr size_t len; 1693108286Stjr int i; 1694108286Stjr 1695108286Stjr out1fmt("%08x", argc - 1); 1696108286Stjr for (i = 1, len = 0; i < argc; i++) 1697108286Stjr len += strlen(argv[i]); 1698108286Stjr out1fmt("%08x", (int)len); 1699215567Sjilles for (i = 1; i < argc; i++) 1700215567Sjilles outbin(argv[i], strlen(argv[i]) + 1, out1); 1701108286Stjr return (0); 1702108286Stjr} 1703