17c478bd9Sstevel@tonic-gate /*
26c02b4a4Smuffin * Copyright 2005 Sun Microsystems, Inc. All rights reserved.
37c478bd9Sstevel@tonic-gate * Use is subject to license terms.
47c478bd9Sstevel@tonic-gate */
57c478bd9Sstevel@tonic-gate
67c478bd9Sstevel@tonic-gate /* Copyright (c) 1983, 1984, 1985, 1986, 1987, 1988, 1989 AT&T */
77c478bd9Sstevel@tonic-gate /* All Rights Reserved */
87c478bd9Sstevel@tonic-gate
97c478bd9Sstevel@tonic-gate /*
107c478bd9Sstevel@tonic-gate * Copyright (c) 1980 Regents of the University of California.
117c478bd9Sstevel@tonic-gate * All rights reserved. The Berkeley Software License Agreement
127c478bd9Sstevel@tonic-gate * specifies the terms and conditions for redistribution.
137c478bd9Sstevel@tonic-gate */
147c478bd9Sstevel@tonic-gate
157c478bd9Sstevel@tonic-gate #pragma ident "%Z%%M% %I% %E% SMI"
167c478bd9Sstevel@tonic-gate
177c478bd9Sstevel@tonic-gate #include <unistd.h> /* for lseek prototype */
187c478bd9Sstevel@tonic-gate #include "sh.h"
197c478bd9Sstevel@tonic-gate #include "sh.tconst.h"
207c478bd9Sstevel@tonic-gate
217c478bd9Sstevel@tonic-gate /*
227c478bd9Sstevel@tonic-gate * C shell
237c478bd9Sstevel@tonic-gate */
247c478bd9Sstevel@tonic-gate
257c478bd9Sstevel@tonic-gate /*
267c478bd9Sstevel@tonic-gate * These routines perform variable substitution and quoting via ' and ".
277c478bd9Sstevel@tonic-gate * To this point these constructs have been preserved in the divided
287c478bd9Sstevel@tonic-gate * input words. Here we expand variables and turn quoting via ' and " into
297c478bd9Sstevel@tonic-gate * QUOTE bits on characters (which prevent further interpretation).
307c478bd9Sstevel@tonic-gate * If the `:q' modifier was applied during history expansion, then
317c478bd9Sstevel@tonic-gate * some QUOTEing may have occurred already, so we dont "trim()" here.
327c478bd9Sstevel@tonic-gate */
337c478bd9Sstevel@tonic-gate
347c478bd9Sstevel@tonic-gate int Dpeekc, Dpeekrd; /* Peeks for DgetC and Dreadc */
357c478bd9Sstevel@tonic-gate tchar *Dcp, **Dvp; /* Input vector for Dreadc */
367c478bd9Sstevel@tonic-gate
377c478bd9Sstevel@tonic-gate #define DEOF -1
387c478bd9Sstevel@tonic-gate
397c478bd9Sstevel@tonic-gate #define unDgetC(c) Dpeekc = c
407c478bd9Sstevel@tonic-gate
41*65b0c20eSnakanon #define QUOTES (_Q|_Q1|_ESC) /* \ ' " ` */
427c478bd9Sstevel@tonic-gate
437c478bd9Sstevel@tonic-gate /*
447c478bd9Sstevel@tonic-gate * The following variables give the information about the current
457c478bd9Sstevel@tonic-gate * $ expansion, recording the current word position, the remaining
467c478bd9Sstevel@tonic-gate * words within this expansion, the count of remaining words, and the
477c478bd9Sstevel@tonic-gate * information about any : modifier which is being applied.
487c478bd9Sstevel@tonic-gate */
497c478bd9Sstevel@tonic-gate tchar *dolp; /* Remaining chars from this word */
507c478bd9Sstevel@tonic-gate tchar **dolnxt; /* Further words */
517c478bd9Sstevel@tonic-gate int dolcnt; /* Count of further words */
527c478bd9Sstevel@tonic-gate tchar dolmod; /* : modifier character */
537c478bd9Sstevel@tonic-gate int dolmcnt; /* :gx -> 10000, else 1 */
547c478bd9Sstevel@tonic-gate
556c02b4a4Smuffin void Dfix2(tchar **);
566c02b4a4Smuffin void Dgetdol(void);
576c02b4a4Smuffin void setDolp(tchar *);
586c02b4a4Smuffin void unDredc(int);
596c02b4a4Smuffin
607c478bd9Sstevel@tonic-gate /*
617c478bd9Sstevel@tonic-gate * Fix up the $ expansions and quotations in the
627c478bd9Sstevel@tonic-gate * argument list to command t.
637c478bd9Sstevel@tonic-gate */
646c02b4a4Smuffin void
Dfix(struct command * t)656c02b4a4Smuffin Dfix(struct command *t)
667c478bd9Sstevel@tonic-gate {
676c02b4a4Smuffin tchar **pp;
686c02b4a4Smuffin tchar *p;
697c478bd9Sstevel@tonic-gate
707c478bd9Sstevel@tonic-gate #ifdef TRACE
717c478bd9Sstevel@tonic-gate tprintf("TRACE- Dfix()\n");
727c478bd9Sstevel@tonic-gate #endif
737c478bd9Sstevel@tonic-gate if (noexec)
747c478bd9Sstevel@tonic-gate return;
757c478bd9Sstevel@tonic-gate /* Note that t_dcom isn't trimmed thus !...:q's aren't lost */
76*65b0c20eSnakanon for (pp = t->t_dcom; p = *pp++; )
777c478bd9Sstevel@tonic-gate while (*p)
787c478bd9Sstevel@tonic-gate if (cmap(*p++, _DOL|QUOTES)) { /* $, \, ', ", ` */
797c478bd9Sstevel@tonic-gate Dfix2(t->t_dcom); /* found one */
807c478bd9Sstevel@tonic-gate blkfree(t->t_dcom);
817c478bd9Sstevel@tonic-gate t->t_dcom = gargv;
827c478bd9Sstevel@tonic-gate gargv = 0;
837c478bd9Sstevel@tonic-gate return;
847c478bd9Sstevel@tonic-gate }
857c478bd9Sstevel@tonic-gate }
867c478bd9Sstevel@tonic-gate
877c478bd9Sstevel@tonic-gate /*
887c478bd9Sstevel@tonic-gate * $ substitute one word, for i/o redirection
897c478bd9Sstevel@tonic-gate */
907c478bd9Sstevel@tonic-gate tchar *
Dfix1(tchar * cp)916c02b4a4Smuffin Dfix1(tchar *cp)
927c478bd9Sstevel@tonic-gate {
937c478bd9Sstevel@tonic-gate tchar *Dv[2];
947c478bd9Sstevel@tonic-gate
957c478bd9Sstevel@tonic-gate #ifdef TRACE
967c478bd9Sstevel@tonic-gate tprintf("TRACE- Dfix1()\n");
977c478bd9Sstevel@tonic-gate #endif
987c478bd9Sstevel@tonic-gate if (noexec)
997c478bd9Sstevel@tonic-gate return (0);
1007c478bd9Sstevel@tonic-gate Dv[0] = cp; Dv[1] = NOSTR;
1017c478bd9Sstevel@tonic-gate Dfix2(Dv);
1027c478bd9Sstevel@tonic-gate if (gargc != 1) {
1037c478bd9Sstevel@tonic-gate setname(cp);
1047c478bd9Sstevel@tonic-gate bferr("Ambiguous");
1057c478bd9Sstevel@tonic-gate }
1067c478bd9Sstevel@tonic-gate cp = savestr(gargv[0]);
1077c478bd9Sstevel@tonic-gate blkfree(gargv), gargv = 0;
1087c478bd9Sstevel@tonic-gate return (cp);
1097c478bd9Sstevel@tonic-gate }
1107c478bd9Sstevel@tonic-gate
1117c478bd9Sstevel@tonic-gate /*
1127c478bd9Sstevel@tonic-gate * Subroutine to do actual fixing after state initialization.
1137c478bd9Sstevel@tonic-gate */
1146c02b4a4Smuffin void
Dfix2(tchar ** v)1156c02b4a4Smuffin Dfix2(tchar **v)
1167c478bd9Sstevel@tonic-gate {
1177c478bd9Sstevel@tonic-gate tchar *agargv[GAVSIZ];
1187c478bd9Sstevel@tonic-gate
1197c478bd9Sstevel@tonic-gate #ifdef TRACE
1207c478bd9Sstevel@tonic-gate tprintf("TRACE- Dfix2()\n");
1217c478bd9Sstevel@tonic-gate #endif
1227c478bd9Sstevel@tonic-gate ginit(agargv); /* Initialize glob's area pointers */
123*65b0c20eSnakanon Dvp = v; Dcp = S_ /* "" */; /* Setup input vector for Dreadc */
1247c478bd9Sstevel@tonic-gate unDgetC(0); unDredc(0); /* Clear out any old peeks (at error) */
1257c478bd9Sstevel@tonic-gate dolp = 0; dolcnt = 0; /* Clear out residual $ expands (...) */
1267c478bd9Sstevel@tonic-gate while (Dword())
1277c478bd9Sstevel@tonic-gate continue;
1287c478bd9Sstevel@tonic-gate gargv = copyblk(gargv);
1297c478bd9Sstevel@tonic-gate }
1307c478bd9Sstevel@tonic-gate
1317c478bd9Sstevel@tonic-gate /*
1327c478bd9Sstevel@tonic-gate * Get a word. This routine is analogous to the routine
1337c478bd9Sstevel@tonic-gate * word() in sh.lex.c for the main lexical input. One difference
1347c478bd9Sstevel@tonic-gate * here is that we don't get a newline to terminate our expansion.
1357c478bd9Sstevel@tonic-gate * Rather, DgetC will return a DEOF when we hit the end-of-input.
1367c478bd9Sstevel@tonic-gate */
1376c02b4a4Smuffin int
Dword(void)1386c02b4a4Smuffin Dword(void)
1397c478bd9Sstevel@tonic-gate {
1406c02b4a4Smuffin int c, c1;
1417c478bd9Sstevel@tonic-gate static tchar *wbuf = NULL;
1427c478bd9Sstevel@tonic-gate static int wbufsiz = BUFSIZ;
1436c02b4a4Smuffin int wp = 0;
1446c02b4a4Smuffin bool dolflg;
1457c478bd9Sstevel@tonic-gate bool sofar = 0;
1467c478bd9Sstevel@tonic-gate #define DYNAMICBUFFER() \
1477c478bd9Sstevel@tonic-gate do { \
1487c478bd9Sstevel@tonic-gate if (wp >= wbufsiz) { \
1497c478bd9Sstevel@tonic-gate wbufsiz += BUFSIZ; \
1507c478bd9Sstevel@tonic-gate wbuf = xrealloc(wbuf, (wbufsiz+1) * sizeof (tchar)); \
1517c478bd9Sstevel@tonic-gate } \
1527c478bd9Sstevel@tonic-gate } while (0)
1537c478bd9Sstevel@tonic-gate
1547c478bd9Sstevel@tonic-gate #ifdef TRACE
1557c478bd9Sstevel@tonic-gate tprintf("TRACE- Dword()\n");
1567c478bd9Sstevel@tonic-gate #endif
1577c478bd9Sstevel@tonic-gate if (wbuf == NULL)
1587c478bd9Sstevel@tonic-gate wbuf = xalloc((wbufsiz+1) * sizeof (tchar));
1597c478bd9Sstevel@tonic-gate loop:
1607c478bd9Sstevel@tonic-gate c = DgetC(DODOL);
1617c478bd9Sstevel@tonic-gate switch (c) {
1627c478bd9Sstevel@tonic-gate
1637c478bd9Sstevel@tonic-gate case DEOF:
1647c478bd9Sstevel@tonic-gate deof:
1657c478bd9Sstevel@tonic-gate if (sofar == 0)
1667c478bd9Sstevel@tonic-gate return (0);
1677c478bd9Sstevel@tonic-gate /* finish this word and catch the code above the next time */
1687c478bd9Sstevel@tonic-gate unDredc(c);
1697c478bd9Sstevel@tonic-gate /* fall into ... */
1707c478bd9Sstevel@tonic-gate
1717c478bd9Sstevel@tonic-gate case '\n':
1727c478bd9Sstevel@tonic-gate wbuf[wp] = 0;
1737c478bd9Sstevel@tonic-gate goto ret;
1747c478bd9Sstevel@tonic-gate
1757c478bd9Sstevel@tonic-gate case ' ':
1767c478bd9Sstevel@tonic-gate case '\t':
1777c478bd9Sstevel@tonic-gate goto loop;
1787c478bd9Sstevel@tonic-gate
1797c478bd9Sstevel@tonic-gate case '`':
1807c478bd9Sstevel@tonic-gate /* We preserve ` quotations which are done yet later */
1817c478bd9Sstevel@tonic-gate wbuf[wp++] = c;
1827c478bd9Sstevel@tonic-gate case '\'':
1837c478bd9Sstevel@tonic-gate case '"':
1847c478bd9Sstevel@tonic-gate /*
1857c478bd9Sstevel@tonic-gate * Note that DgetC never returns a QUOTES character
1867c478bd9Sstevel@tonic-gate * from an expansion, so only true input quotes will
1877c478bd9Sstevel@tonic-gate * get us here or out.
1887c478bd9Sstevel@tonic-gate */
1897c478bd9Sstevel@tonic-gate c1 = c;
1907c478bd9Sstevel@tonic-gate dolflg = c1 == '"' ? DODOL : 0;
1917c478bd9Sstevel@tonic-gate for (;;) {
1927c478bd9Sstevel@tonic-gate c = DgetC(dolflg);
1937c478bd9Sstevel@tonic-gate if (c == c1)
1947c478bd9Sstevel@tonic-gate break;
1957c478bd9Sstevel@tonic-gate if (c == '\n' || c == DEOF)
1967c478bd9Sstevel@tonic-gate error("Unmatched %c", (tchar) c1);
1977c478bd9Sstevel@tonic-gate if ((c & (QUOTE|TRIM)) == ('\n' | QUOTE))
1987c478bd9Sstevel@tonic-gate --wp;
1997c478bd9Sstevel@tonic-gate DYNAMICBUFFER();
2007c478bd9Sstevel@tonic-gate switch (c1) {
2017c478bd9Sstevel@tonic-gate
2027c478bd9Sstevel@tonic-gate case '"':
2037c478bd9Sstevel@tonic-gate /*
2047c478bd9Sstevel@tonic-gate * Leave any `s alone for later.
2057c478bd9Sstevel@tonic-gate * Other chars are all quoted, thus `...`
2067c478bd9Sstevel@tonic-gate * can tell it was within "...".
2077c478bd9Sstevel@tonic-gate */
2087c478bd9Sstevel@tonic-gate wbuf[wp++] = c == '`' ? '`' : c | QUOTE;
2097c478bd9Sstevel@tonic-gate break;
2107c478bd9Sstevel@tonic-gate
2117c478bd9Sstevel@tonic-gate case '\'':
2127c478bd9Sstevel@tonic-gate /* Prevent all further interpretation */
2137c478bd9Sstevel@tonic-gate wbuf[wp++] = c | QUOTE;
2147c478bd9Sstevel@tonic-gate break;
2157c478bd9Sstevel@tonic-gate
2167c478bd9Sstevel@tonic-gate case '`':
2177c478bd9Sstevel@tonic-gate /* Leave all text alone for later */
2187c478bd9Sstevel@tonic-gate wbuf[wp++] = c;
2197c478bd9Sstevel@tonic-gate break;
2207c478bd9Sstevel@tonic-gate }
2217c478bd9Sstevel@tonic-gate }
2227c478bd9Sstevel@tonic-gate if (c1 == '`') {
2237c478bd9Sstevel@tonic-gate DYNAMICBUFFER();
2247c478bd9Sstevel@tonic-gate wbuf[wp++] = '`';
2257c478bd9Sstevel@tonic-gate }
2267c478bd9Sstevel@tonic-gate goto pack; /* continue the word */
2277c478bd9Sstevel@tonic-gate
2287c478bd9Sstevel@tonic-gate case '\\':
2297c478bd9Sstevel@tonic-gate c = DgetC(0); /* No $ subst! */
2307c478bd9Sstevel@tonic-gate if (c == '\n' || c == DEOF)
2317c478bd9Sstevel@tonic-gate goto loop;
2327c478bd9Sstevel@tonic-gate c |= QUOTE;
2337c478bd9Sstevel@tonic-gate break;
2347c478bd9Sstevel@tonic-gate #ifdef MBCHAR /* Could be a space char from aux. codeset. */
2357c478bd9Sstevel@tonic-gate default:
2367c478bd9Sstevel@tonic-gate if (isauxsp(c)) goto loop;
2377c478bd9Sstevel@tonic-gate #endif /* MBCHAR */
2387c478bd9Sstevel@tonic-gate }
2397c478bd9Sstevel@tonic-gate unDgetC(c);
2407c478bd9Sstevel@tonic-gate pack:
2417c478bd9Sstevel@tonic-gate sofar = 1;
2427c478bd9Sstevel@tonic-gate /* pack up more characters in this word */
2437c478bd9Sstevel@tonic-gate for (;;) {
2447c478bd9Sstevel@tonic-gate c = DgetC(DODOL);
2457c478bd9Sstevel@tonic-gate if (c == '\\') {
2467c478bd9Sstevel@tonic-gate c = DgetC(0);
2477c478bd9Sstevel@tonic-gate if (c == DEOF)
2487c478bd9Sstevel@tonic-gate goto deof;
2497c478bd9Sstevel@tonic-gate if (c == '\n')
2507c478bd9Sstevel@tonic-gate c = ' ';
2517c478bd9Sstevel@tonic-gate else
2527c478bd9Sstevel@tonic-gate c |= QUOTE;
2537c478bd9Sstevel@tonic-gate }
2547c478bd9Sstevel@tonic-gate if (c == DEOF)
2557c478bd9Sstevel@tonic-gate goto deof;
2567c478bd9Sstevel@tonic-gate if (cmap(c, _SP|_NL|_Q|_Q1) ||
2577c478bd9Sstevel@tonic-gate isauxsp(c)) { /* sp \t\n'"` or aux. sp */
2587c478bd9Sstevel@tonic-gate unDgetC(c);
2597c478bd9Sstevel@tonic-gate if (cmap(c, QUOTES))
2607c478bd9Sstevel@tonic-gate goto loop;
2617c478bd9Sstevel@tonic-gate DYNAMICBUFFER();
2627c478bd9Sstevel@tonic-gate wbuf[wp++] = 0;
2637c478bd9Sstevel@tonic-gate goto ret;
2647c478bd9Sstevel@tonic-gate }
2657c478bd9Sstevel@tonic-gate DYNAMICBUFFER();
2667c478bd9Sstevel@tonic-gate wbuf[wp++] = c;
2677c478bd9Sstevel@tonic-gate }
2687c478bd9Sstevel@tonic-gate ret:
2697c478bd9Sstevel@tonic-gate Gcat(S_ /* "" */, wbuf);
2707c478bd9Sstevel@tonic-gate return (1);
2717c478bd9Sstevel@tonic-gate }
2727c478bd9Sstevel@tonic-gate
2737c478bd9Sstevel@tonic-gate /*
2747c478bd9Sstevel@tonic-gate * Get a character, performing $ substitution unless flag is 0.
2757c478bd9Sstevel@tonic-gate * Any QUOTES character which is returned from a $ expansion is
2767c478bd9Sstevel@tonic-gate * QUOTEd so that it will not be recognized above.
2777c478bd9Sstevel@tonic-gate */
2786c02b4a4Smuffin int
DgetC(int flag)2796c02b4a4Smuffin DgetC(int flag)
2807c478bd9Sstevel@tonic-gate {
2816c02b4a4Smuffin int c;
2827c478bd9Sstevel@tonic-gate
2837c478bd9Sstevel@tonic-gate top:
2847c478bd9Sstevel@tonic-gate if (c = Dpeekc) {
2857c478bd9Sstevel@tonic-gate Dpeekc = 0;
2867c478bd9Sstevel@tonic-gate return (c);
2877c478bd9Sstevel@tonic-gate }
2887c478bd9Sstevel@tonic-gate if (lap) {
2897c478bd9Sstevel@tonic-gate c = *lap++ & (QUOTE|TRIM);
2907c478bd9Sstevel@tonic-gate if (c == 0) {
2917c478bd9Sstevel@tonic-gate lap = 0;
2927c478bd9Sstevel@tonic-gate goto top;
2937c478bd9Sstevel@tonic-gate }
2947c478bd9Sstevel@tonic-gate quotspec:
2957c478bd9Sstevel@tonic-gate /*
2967c478bd9Sstevel@tonic-gate * don't quote things if there was an error (err!=0)
2977c478bd9Sstevel@tonic-gate * the input is original, not from a substitution and
2987c478bd9Sstevel@tonic-gate * therefore should not be quoted
2997c478bd9Sstevel@tonic-gate */
3007c478bd9Sstevel@tonic-gate if (!err && cmap(c, QUOTES))
3017c478bd9Sstevel@tonic-gate return (c | QUOTE);
3027c478bd9Sstevel@tonic-gate return (c);
3037c478bd9Sstevel@tonic-gate }
3047c478bd9Sstevel@tonic-gate if (dolp) {
3057c478bd9Sstevel@tonic-gate if (c = *dolp++ & (QUOTE|TRIM))
3067c478bd9Sstevel@tonic-gate goto quotspec;
3077c478bd9Sstevel@tonic-gate if (dolcnt > 0) {
3087c478bd9Sstevel@tonic-gate setDolp(*dolnxt++);
3097c478bd9Sstevel@tonic-gate --dolcnt;
3107c478bd9Sstevel@tonic-gate return (' ');
3117c478bd9Sstevel@tonic-gate }
3127c478bd9Sstevel@tonic-gate dolp = 0;
3137c478bd9Sstevel@tonic-gate }
3147c478bd9Sstevel@tonic-gate if (dolcnt > 0) {
3157c478bd9Sstevel@tonic-gate setDolp(*dolnxt++);
3167c478bd9Sstevel@tonic-gate --dolcnt;
3177c478bd9Sstevel@tonic-gate goto top;
3187c478bd9Sstevel@tonic-gate }
3197c478bd9Sstevel@tonic-gate c = Dredc();
3207c478bd9Sstevel@tonic-gate if (c == '$' && flag) {
3217c478bd9Sstevel@tonic-gate Dgetdol();
3227c478bd9Sstevel@tonic-gate goto top;
3237c478bd9Sstevel@tonic-gate }
3247c478bd9Sstevel@tonic-gate return (c);
3257c478bd9Sstevel@tonic-gate }
3267c478bd9Sstevel@tonic-gate
3277c478bd9Sstevel@tonic-gate tchar *nulvec[] = { 0 };
3287c478bd9Sstevel@tonic-gate struct varent nulargv = { nulvec, S_argv, 0 };
3297c478bd9Sstevel@tonic-gate
3307c478bd9Sstevel@tonic-gate /*
3317c478bd9Sstevel@tonic-gate * Handle the multitudinous $ expansion forms.
3327c478bd9Sstevel@tonic-gate * Ugh.
3337c478bd9Sstevel@tonic-gate */
3346c02b4a4Smuffin void
Dgetdol(void)3356c02b4a4Smuffin Dgetdol(void)
3367c478bd9Sstevel@tonic-gate {
3376c02b4a4Smuffin tchar *np;
3386c02b4a4Smuffin struct varent *vp;
3397c478bd9Sstevel@tonic-gate tchar name[MAX_VREF_LEN];
3407c478bd9Sstevel@tonic-gate int c, sc;
3417c478bd9Sstevel@tonic-gate int subscr = 0, lwb = 1, upb = 0;
3427c478bd9Sstevel@tonic-gate bool dimen = 0, bitset = 0;
343*65b0c20eSnakanon tchar wbuf[BUFSIZ + MB_LEN_MAX]; /* read_ may return extra bytes */
3447c478bd9Sstevel@tonic-gate
3457c478bd9Sstevel@tonic-gate #ifdef TRACE
3467c478bd9Sstevel@tonic-gate tprintf("TRACE- Dgetdol()\n");
3477c478bd9Sstevel@tonic-gate #endif
3487c478bd9Sstevel@tonic-gate dolmod = dolmcnt = 0;
3497c478bd9Sstevel@tonic-gate c = sc = DgetC(0);
3507c478bd9Sstevel@tonic-gate if (c == '{')
3517c478bd9Sstevel@tonic-gate c = DgetC(0); /* sc is { to take } later */
3527c478bd9Sstevel@tonic-gate if ((c & TRIM) == '#')
3537c478bd9Sstevel@tonic-gate dimen++, c = DgetC(0); /* $# takes dimension */
3547c478bd9Sstevel@tonic-gate else if (c == '?')
3557c478bd9Sstevel@tonic-gate bitset++, c = DgetC(0); /* $? tests existence */
3567c478bd9Sstevel@tonic-gate switch (c) {
357*65b0c20eSnakanon
3587c478bd9Sstevel@tonic-gate case '$':
3597c478bd9Sstevel@tonic-gate if (dimen || bitset)
3607c478bd9Sstevel@tonic-gate syntax:
3617c478bd9Sstevel@tonic-gate error("Variable syntax"); /* No $?$, $#$ */
3627c478bd9Sstevel@tonic-gate setDolp(doldol);
3637c478bd9Sstevel@tonic-gate goto eatbrac;
3647c478bd9Sstevel@tonic-gate
3657c478bd9Sstevel@tonic-gate case '<'|QUOTE:
3667c478bd9Sstevel@tonic-gate if (dimen || bitset)
3677c478bd9Sstevel@tonic-gate goto syntax; /* No $?<, $#< */
3687c478bd9Sstevel@tonic-gate for (np = wbuf; read_(OLDSTD, np, 1) == 1; np++) {
3697c478bd9Sstevel@tonic-gate if (np >= &wbuf[BUFSIZ-1])
3707c478bd9Sstevel@tonic-gate error("$< line too long");
3717c478bd9Sstevel@tonic-gate if (*np <= 0 || *np == '\n')
3727c478bd9Sstevel@tonic-gate break;
3737c478bd9Sstevel@tonic-gate }
3747c478bd9Sstevel@tonic-gate *np = 0;
3757c478bd9Sstevel@tonic-gate /*
3767c478bd9Sstevel@tonic-gate * KLUDGE: dolmod is set here because it will
3777c478bd9Sstevel@tonic-gate * cause setDolp to call domod and thus to copy wbuf.
3787c478bd9Sstevel@tonic-gate * Otherwise setDolp would use it directly. If we saved
3797c478bd9Sstevel@tonic-gate * it ourselves, no one would know when to free it.
3807c478bd9Sstevel@tonic-gate * The actual function of the 'q' causes filename
3817c478bd9Sstevel@tonic-gate * expansion not to be done on the interpolated value.
3827c478bd9Sstevel@tonic-gate */
3837c478bd9Sstevel@tonic-gate dolmod = 'q';
3847c478bd9Sstevel@tonic-gate dolmcnt = 10000;
3857c478bd9Sstevel@tonic-gate setDolp(wbuf);
3867c478bd9Sstevel@tonic-gate goto eatbrac;
3877c478bd9Sstevel@tonic-gate
3887c478bd9Sstevel@tonic-gate case DEOF:
3897c478bd9Sstevel@tonic-gate case '\n':
3907c478bd9Sstevel@tonic-gate goto syntax;
3917c478bd9Sstevel@tonic-gate
3927c478bd9Sstevel@tonic-gate case '*':
3937c478bd9Sstevel@tonic-gate (void) strcpy_(name, S_argv);
3947c478bd9Sstevel@tonic-gate vp = adrof(S_argv);
3957c478bd9Sstevel@tonic-gate subscr = -1; /* Prevent eating [...] */
3967c478bd9Sstevel@tonic-gate break;
3977c478bd9Sstevel@tonic-gate
3987c478bd9Sstevel@tonic-gate default:
3997c478bd9Sstevel@tonic-gate np = name;
4007c478bd9Sstevel@tonic-gate if (digit(c)) {
4017c478bd9Sstevel@tonic-gate if (dimen)
4027c478bd9Sstevel@tonic-gate goto syntax; /* No $#1, e.g. */
4037c478bd9Sstevel@tonic-gate subscr = 0;
4047c478bd9Sstevel@tonic-gate do {
4057c478bd9Sstevel@tonic-gate subscr = subscr * 10 + c - '0';
4067c478bd9Sstevel@tonic-gate c = DgetC(0);
4077c478bd9Sstevel@tonic-gate } while (digit(c));
4087c478bd9Sstevel@tonic-gate unDredc(c);
4097c478bd9Sstevel@tonic-gate if (subscr < 0)
4107c478bd9Sstevel@tonic-gate error("Subscript out of range");
4117c478bd9Sstevel@tonic-gate if (subscr == 0) {
4127c478bd9Sstevel@tonic-gate if (bitset) {
413*65b0c20eSnakanon dolp = file ? S_1 /* "1" */ : S_0 /* "0" */;
4147c478bd9Sstevel@tonic-gate goto eatbrac;
4157c478bd9Sstevel@tonic-gate }
4167c478bd9Sstevel@tonic-gate if (file == 0)
4177c478bd9Sstevel@tonic-gate error("No file for $0");
4187c478bd9Sstevel@tonic-gate setDolp(file);
4197c478bd9Sstevel@tonic-gate goto eatbrac;
4207c478bd9Sstevel@tonic-gate }
4217c478bd9Sstevel@tonic-gate if (bitset)
4227c478bd9Sstevel@tonic-gate goto syntax;
4237c478bd9Sstevel@tonic-gate vp = adrof(S_argv);
4247c478bd9Sstevel@tonic-gate if (vp == 0) {
4257c478bd9Sstevel@tonic-gate vp = &nulargv;
4267c478bd9Sstevel@tonic-gate goto eatmod;
4277c478bd9Sstevel@tonic-gate }
4287c478bd9Sstevel@tonic-gate break;
4297c478bd9Sstevel@tonic-gate }
4307c478bd9Sstevel@tonic-gate if (!alnum(c))
4317c478bd9Sstevel@tonic-gate goto syntax;
4327c478bd9Sstevel@tonic-gate for (;;) {
4337c478bd9Sstevel@tonic-gate *np++ = c;
4347c478bd9Sstevel@tonic-gate c = DgetC(0);
4357c478bd9Sstevel@tonic-gate if (!alnum(c))
4367c478bd9Sstevel@tonic-gate break;
4377c478bd9Sstevel@tonic-gate /* if variable name is > 20, complain */
4387c478bd9Sstevel@tonic-gate if (np >= &name[MAX_VAR_LEN])
4397c478bd9Sstevel@tonic-gate error("Variable name too long");
4407c478bd9Sstevel@tonic-gate
4417c478bd9Sstevel@tonic-gate }
4427c478bd9Sstevel@tonic-gate *np++ = 0;
4437c478bd9Sstevel@tonic-gate unDredc(c);
4447c478bd9Sstevel@tonic-gate vp = adrof(name);
4457c478bd9Sstevel@tonic-gate }
4467c478bd9Sstevel@tonic-gate if (bitset) {
447*65b0c20eSnakanon /*
448*65b0c20eSnakanon * getenv() to getenv_(), because 'name''s type is now tchar *
449*65b0c20eSnakanon * no need to xalloc
450*65b0c20eSnakanon */
451*65b0c20eSnakanon dolp = (vp || getenv_(name)) ? S_1 /* "1" */ : S_0 /* "0" */;
4527c478bd9Sstevel@tonic-gate goto eatbrac;
4537c478bd9Sstevel@tonic-gate }
4547c478bd9Sstevel@tonic-gate if (vp == 0) {
455*65b0c20eSnakanon /*
456*65b0c20eSnakanon * getenv() to getenv_(), because 'name''s type is now tchar *
457*65b0c20eSnakanon * no need to xalloc
458*65b0c20eSnakanon */
4597c478bd9Sstevel@tonic-gate np = getenv_(name);
4607c478bd9Sstevel@tonic-gate if (np) {
4617c478bd9Sstevel@tonic-gate addla(np);
4627c478bd9Sstevel@tonic-gate goto eatbrac;
4637c478bd9Sstevel@tonic-gate }
4647c478bd9Sstevel@tonic-gate udvar(name);
4657c478bd9Sstevel@tonic-gate /*NOTREACHED*/
4667c478bd9Sstevel@tonic-gate }
4677c478bd9Sstevel@tonic-gate c = DgetC(0);
4687c478bd9Sstevel@tonic-gate upb = blklen(vp->vec);
4697c478bd9Sstevel@tonic-gate if (dimen == 0 && subscr == 0 && c == '[') {
4707c478bd9Sstevel@tonic-gate np = name;
4717c478bd9Sstevel@tonic-gate for (;;) {
4727c478bd9Sstevel@tonic-gate c = DgetC(DODOL); /* Allow $ expand within [ ] */
4737c478bd9Sstevel@tonic-gate if (c == ']')
4747c478bd9Sstevel@tonic-gate break;
4757c478bd9Sstevel@tonic-gate if (c == '\n' || c == DEOF)
4767c478bd9Sstevel@tonic-gate goto syntax;
4777c478bd9Sstevel@tonic-gate if (np >= &name[MAX_VREF_LEN])
4787c478bd9Sstevel@tonic-gate error("Variable reference too long");
4797c478bd9Sstevel@tonic-gate *np++ = c;
4807c478bd9Sstevel@tonic-gate }
4817c478bd9Sstevel@tonic-gate *np = 0, np = name;
4827c478bd9Sstevel@tonic-gate if (dolp || dolcnt) /* $ exp must end before ] */
4837c478bd9Sstevel@tonic-gate goto syntax;
4847c478bd9Sstevel@tonic-gate if (!*np)
4857c478bd9Sstevel@tonic-gate goto syntax;
4867c478bd9Sstevel@tonic-gate if (digit(*np)) {
4876c02b4a4Smuffin int i = 0;
4887c478bd9Sstevel@tonic-gate
4897c478bd9Sstevel@tonic-gate while (digit(*np))
4907c478bd9Sstevel@tonic-gate i = i * 10 + *np++ - '0';
491*65b0c20eSnakanon /* if ((i < 0 || i > upb) && !any(*np, "-*")) { */
492*65b0c20eSnakanon if ((i < 0 || i > upb) && (*np != '-') && (*np != '*')) {
4937c478bd9Sstevel@tonic-gate oob:
4947c478bd9Sstevel@tonic-gate setname(vp->v_name);
4957c478bd9Sstevel@tonic-gate error("Subscript out of range");
4967c478bd9Sstevel@tonic-gate }
4977c478bd9Sstevel@tonic-gate lwb = i;
4987c478bd9Sstevel@tonic-gate if (!*np)
499*65b0c20eSnakanon upb = lwb, np = S_AST /* "*" */;
5007c478bd9Sstevel@tonic-gate }
5017c478bd9Sstevel@tonic-gate if (*np == '*')
5027c478bd9Sstevel@tonic-gate np++;
5037c478bd9Sstevel@tonic-gate else if (*np != '-')
5047c478bd9Sstevel@tonic-gate goto syntax;
5057c478bd9Sstevel@tonic-gate else {
5066c02b4a4Smuffin int i = upb;
5077c478bd9Sstevel@tonic-gate
5087c478bd9Sstevel@tonic-gate np++;
5097c478bd9Sstevel@tonic-gate if (digit(*np)) {
5107c478bd9Sstevel@tonic-gate i = 0;
5117c478bd9Sstevel@tonic-gate while (digit(*np))
5127c478bd9Sstevel@tonic-gate i = i * 10 + *np++ - '0';
5137c478bd9Sstevel@tonic-gate if (i < 0 || i > upb)
5147c478bd9Sstevel@tonic-gate goto oob;
5157c478bd9Sstevel@tonic-gate }
5167c478bd9Sstevel@tonic-gate if (i < lwb)
5177c478bd9Sstevel@tonic-gate upb = lwb - 1;
5187c478bd9Sstevel@tonic-gate else
5197c478bd9Sstevel@tonic-gate upb = i;
5207c478bd9Sstevel@tonic-gate }
5217c478bd9Sstevel@tonic-gate if (lwb == 0) {
5227c478bd9Sstevel@tonic-gate if (upb != 0)
5237c478bd9Sstevel@tonic-gate goto oob;
5247c478bd9Sstevel@tonic-gate upb = -1;
5257c478bd9Sstevel@tonic-gate }
5267c478bd9Sstevel@tonic-gate if (*np)
5277c478bd9Sstevel@tonic-gate goto syntax;
5287c478bd9Sstevel@tonic-gate } else {
5297c478bd9Sstevel@tonic-gate if (subscr > 0)
5307c478bd9Sstevel@tonic-gate if (subscr > upb)
5317c478bd9Sstevel@tonic-gate lwb = 1, upb = 0;
5327c478bd9Sstevel@tonic-gate else
5337c478bd9Sstevel@tonic-gate lwb = upb = subscr;
5347c478bd9Sstevel@tonic-gate unDredc(c);
5357c478bd9Sstevel@tonic-gate }
5367c478bd9Sstevel@tonic-gate if (dimen) {
5377c478bd9Sstevel@tonic-gate tchar *cp = putn(upb - lwb + 1);
5387c478bd9Sstevel@tonic-gate
5397c478bd9Sstevel@tonic-gate addla(cp);
5407c478bd9Sstevel@tonic-gate xfree(cp);
5417c478bd9Sstevel@tonic-gate } else {
5427c478bd9Sstevel@tonic-gate eatmod:
5437c478bd9Sstevel@tonic-gate c = DgetC(0);
5447c478bd9Sstevel@tonic-gate if (c == ':') {
5457c478bd9Sstevel@tonic-gate c = DgetC(0), dolmcnt = 1;
5467c478bd9Sstevel@tonic-gate if (c == 'g')
5477c478bd9Sstevel@tonic-gate c = DgetC(0), dolmcnt = 10000;
5487c478bd9Sstevel@tonic-gate if (!any(c, S_htrqxe))
5497c478bd9Sstevel@tonic-gate error("Bad : mod in $");
5507c478bd9Sstevel@tonic-gate dolmod = c;
5517c478bd9Sstevel@tonic-gate if (c == 'q')
5527c478bd9Sstevel@tonic-gate dolmcnt = 10000;
5537c478bd9Sstevel@tonic-gate } else
5547c478bd9Sstevel@tonic-gate unDredc(c);
5557c478bd9Sstevel@tonic-gate dolnxt = &vp->vec[lwb - 1];
5567c478bd9Sstevel@tonic-gate dolcnt = upb - lwb + 1;
5577c478bd9Sstevel@tonic-gate }
5587c478bd9Sstevel@tonic-gate eatbrac:
5597c478bd9Sstevel@tonic-gate if (sc == '{') {
5607c478bd9Sstevel@tonic-gate c = Dredc();
5617c478bd9Sstevel@tonic-gate if (c != '}')
5627c478bd9Sstevel@tonic-gate goto syntax;
5637c478bd9Sstevel@tonic-gate }
5647c478bd9Sstevel@tonic-gate }
5657c478bd9Sstevel@tonic-gate
5666c02b4a4Smuffin void
setDolp(tchar * cp)5676c02b4a4Smuffin setDolp(tchar *cp)
5687c478bd9Sstevel@tonic-gate {
5696c02b4a4Smuffin tchar *dp;
5707c478bd9Sstevel@tonic-gate
5717c478bd9Sstevel@tonic-gate #ifdef TRACE
5727c478bd9Sstevel@tonic-gate tprintf("TRACE- setDolp()\n");
5737c478bd9Sstevel@tonic-gate #endif
5747c478bd9Sstevel@tonic-gate if (dolmod == 0 || dolmcnt == 0) {
5757c478bd9Sstevel@tonic-gate dolp = cp;
5767c478bd9Sstevel@tonic-gate return;
5777c478bd9Sstevel@tonic-gate }
5787c478bd9Sstevel@tonic-gate dp = domod(cp, dolmod);
5797c478bd9Sstevel@tonic-gate if (dp) {
5807c478bd9Sstevel@tonic-gate dolmcnt--;
5817c478bd9Sstevel@tonic-gate addla(dp);
5827c478bd9Sstevel@tonic-gate xfree(dp);
5837c478bd9Sstevel@tonic-gate } else
5847c478bd9Sstevel@tonic-gate addla(cp);
585*65b0c20eSnakanon dolp = S_ /* "" */;
5867c478bd9Sstevel@tonic-gate }
5877c478bd9Sstevel@tonic-gate
5886c02b4a4Smuffin void
unDredc(int c)5896c02b4a4Smuffin unDredc(int c)
5907c478bd9Sstevel@tonic-gate {
5917c478bd9Sstevel@tonic-gate
5927c478bd9Sstevel@tonic-gate Dpeekrd = c;
5937c478bd9Sstevel@tonic-gate }
5947c478bd9Sstevel@tonic-gate
5956c02b4a4Smuffin int
Dredc()5967c478bd9Sstevel@tonic-gate Dredc()
5977c478bd9Sstevel@tonic-gate {
5986c02b4a4Smuffin int c;
5997c478bd9Sstevel@tonic-gate
6007c478bd9Sstevel@tonic-gate if (c = Dpeekrd) {
6017c478bd9Sstevel@tonic-gate Dpeekrd = 0;
6027c478bd9Sstevel@tonic-gate return (c);
6037c478bd9Sstevel@tonic-gate }
6047c478bd9Sstevel@tonic-gate if (Dcp && (c = *Dcp++))
6057c478bd9Sstevel@tonic-gate return (c&(QUOTE|TRIM));
6067c478bd9Sstevel@tonic-gate if (*Dvp == 0) {
6077c478bd9Sstevel@tonic-gate Dcp = 0;
6087c478bd9Sstevel@tonic-gate return (DEOF);
6097c478bd9Sstevel@tonic-gate }
6107c478bd9Sstevel@tonic-gate Dcp = *Dvp++;
6117c478bd9Sstevel@tonic-gate return (' ');
6127c478bd9Sstevel@tonic-gate }
6137c478bd9Sstevel@tonic-gate
6146c02b4a4Smuffin void
Dtestq(int c)6156c02b4a4Smuffin Dtestq(int c)
6167c478bd9Sstevel@tonic-gate {
6177c478bd9Sstevel@tonic-gate
6187c478bd9Sstevel@tonic-gate if (cmap(c, QUOTES))
6197c478bd9Sstevel@tonic-gate gflag = 1;
6207c478bd9Sstevel@tonic-gate }
6217c478bd9Sstevel@tonic-gate
6227c478bd9Sstevel@tonic-gate /*
6237c478bd9Sstevel@tonic-gate * Form a shell temporary file (in unit 0) from the words
6247c478bd9Sstevel@tonic-gate * of the shell input up to a line the same as "term".
6257c478bd9Sstevel@tonic-gate * Unit 0 should have been closed before this call.
6267c478bd9Sstevel@tonic-gate */
6276c02b4a4Smuffin void
heredoc(tchar * term)6286c02b4a4Smuffin heredoc(tchar *term)
6297c478bd9Sstevel@tonic-gate {
6306c02b4a4Smuffin int c;
6317c478bd9Sstevel@tonic-gate tchar *Dv[2];
6327c478bd9Sstevel@tonic-gate tchar obuf[BUFSIZ], lbuf[BUFSIZ], mbuf[BUFSIZ];
6337c478bd9Sstevel@tonic-gate int ocnt, lcnt, mcnt;
6346c02b4a4Smuffin tchar *lbp, *obp, *mbp;
6357c478bd9Sstevel@tonic-gate tchar **vp;
6367c478bd9Sstevel@tonic-gate bool quoted;
6377c478bd9Sstevel@tonic-gate tchar shtemp[] = {'/', 't', 'm', 'p', '/', 's', 'h', 'X', 'X', 'X',
6387c478bd9Sstevel@tonic-gate 'X', 'X', 'X', 0};
6397c478bd9Sstevel@tonic-gate int fd1;
6407c478bd9Sstevel@tonic-gate
6417c478bd9Sstevel@tonic-gate #ifdef TRACE
6427c478bd9Sstevel@tonic-gate tprintf("TRACE- heredoc()\n");
6437c478bd9Sstevel@tonic-gate #endif
6447c478bd9Sstevel@tonic-gate if ((fd1 = mkstemp_(shtemp)) < 0)
6457c478bd9Sstevel@tonic-gate Perror(shtemp);
6467c478bd9Sstevel@tonic-gate (void) unlink_(shtemp); /* 0 0 inode! */
6477c478bd9Sstevel@tonic-gate unsetfd(fd1);
6487c478bd9Sstevel@tonic-gate Dv[0] = term; Dv[1] = NOSTR; gflag = 0;
6497c478bd9Sstevel@tonic-gate trim(Dv); rscan(Dv, Dtestq); quoted = gflag;
6507c478bd9Sstevel@tonic-gate ocnt = BUFSIZ; obp = obuf;
6517c478bd9Sstevel@tonic-gate for (;;) {
6527c478bd9Sstevel@tonic-gate /*
6537c478bd9Sstevel@tonic-gate * Read up a line
6547c478bd9Sstevel@tonic-gate */
6557c478bd9Sstevel@tonic-gate lbp = lbuf; lcnt = BUFSIZ - 4;
6567c478bd9Sstevel@tonic-gate for (;;) {
6577c478bd9Sstevel@tonic-gate c = readc(1); /* 1 -> Want EOF returns */
6587c478bd9Sstevel@tonic-gate if (c < 0) {
6597c478bd9Sstevel@tonic-gate setname(term);
6607c478bd9Sstevel@tonic-gate bferr("<< terminator not found");
6617c478bd9Sstevel@tonic-gate }
6627c478bd9Sstevel@tonic-gate if (c == '\n')
6637c478bd9Sstevel@tonic-gate break;
6647c478bd9Sstevel@tonic-gate if (c &= TRIM) {
6657c478bd9Sstevel@tonic-gate *lbp++ = c;
6667c478bd9Sstevel@tonic-gate if (--lcnt < 0) {
667*65b0c20eSnakanon setname(S_LESLES /* "<<" */);
6687c478bd9Sstevel@tonic-gate error("Line overflow");
669*65b0c20eSnakanon }
6707c478bd9Sstevel@tonic-gate }
6717c478bd9Sstevel@tonic-gate }
6727c478bd9Sstevel@tonic-gate *lbp = 0;
6737c478bd9Sstevel@tonic-gate
6747c478bd9Sstevel@tonic-gate /*
6757c478bd9Sstevel@tonic-gate * Compare to terminator -- before expansion
6767c478bd9Sstevel@tonic-gate */
6777c478bd9Sstevel@tonic-gate if (eq(lbuf, term)) {
6787c478bd9Sstevel@tonic-gate (void) write_(0, obuf, BUFSIZ - ocnt);
6797c478bd9Sstevel@tonic-gate (void) lseek(0, (off_t)0, 0);
6807c478bd9Sstevel@tonic-gate return;
6817c478bd9Sstevel@tonic-gate }
6827c478bd9Sstevel@tonic-gate
6837c478bd9Sstevel@tonic-gate /*
6847c478bd9Sstevel@tonic-gate * If term was quoted or -n just pass it on
6857c478bd9Sstevel@tonic-gate */
6867c478bd9Sstevel@tonic-gate if (quoted || noexec) {
6877c478bd9Sstevel@tonic-gate *lbp++ = '\n'; *lbp = 0;
688*65b0c20eSnakanon for (lbp = lbuf; c = *lbp++; ) {
6897c478bd9Sstevel@tonic-gate *obp++ = c;
6907c478bd9Sstevel@tonic-gate if (--ocnt == 0) {
6917c478bd9Sstevel@tonic-gate (void) write_(0, obuf, BUFSIZ);
6927c478bd9Sstevel@tonic-gate obp = obuf; ocnt = BUFSIZ;
6937c478bd9Sstevel@tonic-gate }
6947c478bd9Sstevel@tonic-gate }
6957c478bd9Sstevel@tonic-gate continue;
6967c478bd9Sstevel@tonic-gate }
6977c478bd9Sstevel@tonic-gate
6987c478bd9Sstevel@tonic-gate /*
6997c478bd9Sstevel@tonic-gate * Term wasn't quoted so variable and then command
7007c478bd9Sstevel@tonic-gate * expand the input line
7017c478bd9Sstevel@tonic-gate */
7027c478bd9Sstevel@tonic-gate Dcp = lbuf; Dvp = Dv + 1; mbp = mbuf; mcnt = BUFSIZ - 4;
7037c478bd9Sstevel@tonic-gate for (;;) {
7047c478bd9Sstevel@tonic-gate c = DgetC(DODOL);
7057c478bd9Sstevel@tonic-gate if (c == DEOF)
7067c478bd9Sstevel@tonic-gate break;
7077c478bd9Sstevel@tonic-gate if ((c &= TRIM) == 0)
7087c478bd9Sstevel@tonic-gate continue;
7097c478bd9Sstevel@tonic-gate /* \ quotes \ $ ` here */
710*65b0c20eSnakanon if (c == '\\') {
7117c478bd9Sstevel@tonic-gate c = DgetC(0);
712*65b0c20eSnakanon /* if (!any(c, "$\\`")) */
713*65b0c20eSnakanon if ((c != '$') && (c != '\\') && (c != '`'))
7147c478bd9Sstevel@tonic-gate unDgetC(c | QUOTE), c = '\\';
7157c478bd9Sstevel@tonic-gate else
7167c478bd9Sstevel@tonic-gate c |= QUOTE;
7177c478bd9Sstevel@tonic-gate }
7187c478bd9Sstevel@tonic-gate *mbp++ = c;
7197c478bd9Sstevel@tonic-gate if (--mcnt == 0) {
720*65b0c20eSnakanon setname(S_LESLES /* "<<" */);
7217c478bd9Sstevel@tonic-gate bferr("Line overflow");
7227c478bd9Sstevel@tonic-gate }
7237c478bd9Sstevel@tonic-gate }
7247c478bd9Sstevel@tonic-gate *mbp++ = 0;
7257c478bd9Sstevel@tonic-gate
7267c478bd9Sstevel@tonic-gate /*
7277c478bd9Sstevel@tonic-gate * If any ` in line do command substitution
7287c478bd9Sstevel@tonic-gate */
7297c478bd9Sstevel@tonic-gate mbp = mbuf;
7307c478bd9Sstevel@tonic-gate if (any('`', mbp)) {
7317c478bd9Sstevel@tonic-gate /*
7327c478bd9Sstevel@tonic-gate * 1 arg to dobackp causes substitution to be literal.
7337c478bd9Sstevel@tonic-gate * Words are broken only at newlines so that all blanks
7347c478bd9Sstevel@tonic-gate * and tabs are preserved. Blank lines (null words)
7357c478bd9Sstevel@tonic-gate * are not discarded.
7367c478bd9Sstevel@tonic-gate */
7377c478bd9Sstevel@tonic-gate vp = dobackp(mbuf, 1);
7387c478bd9Sstevel@tonic-gate } else
7397c478bd9Sstevel@tonic-gate /* Setup trivial vector similar to return of dobackp */
7407c478bd9Sstevel@tonic-gate Dv[0] = mbp, Dv[1] = NOSTR, vp = Dv;
7417c478bd9Sstevel@tonic-gate
7427c478bd9Sstevel@tonic-gate /*
7437c478bd9Sstevel@tonic-gate * Resurrect the words from the command substitution
7447c478bd9Sstevel@tonic-gate * each separated by a newline. Note that the last
7457c478bd9Sstevel@tonic-gate * newline of a command substitution will have been
7467c478bd9Sstevel@tonic-gate * discarded, but we put a newline after the last word
7477c478bd9Sstevel@tonic-gate * because this represents the newline after the last
7487c478bd9Sstevel@tonic-gate * input line!
7497c478bd9Sstevel@tonic-gate */
7507c478bd9Sstevel@tonic-gate for (; *vp; vp++) {
7517c478bd9Sstevel@tonic-gate for (mbp = *vp; *mbp; mbp++) {
7527c478bd9Sstevel@tonic-gate *obp++ = *mbp & TRIM;
7537c478bd9Sstevel@tonic-gate if (--ocnt == 0) {
7547c478bd9Sstevel@tonic-gate (void) write_(0, obuf, BUFSIZ);
7557c478bd9Sstevel@tonic-gate obp = obuf; ocnt = BUFSIZ;
7567c478bd9Sstevel@tonic-gate }
7577c478bd9Sstevel@tonic-gate }
7587c478bd9Sstevel@tonic-gate *obp++ = '\n';
7597c478bd9Sstevel@tonic-gate if (--ocnt == 0) {
7607c478bd9Sstevel@tonic-gate (void) write_(0, obuf, BUFSIZ);
7617c478bd9Sstevel@tonic-gate obp = obuf; ocnt = BUFSIZ;
7627c478bd9Sstevel@tonic-gate }
7637c478bd9Sstevel@tonic-gate }
7647c478bd9Sstevel@tonic-gate if (pargv)
7657c478bd9Sstevel@tonic-gate blkfree(pargv), pargv = 0;
7667c478bd9Sstevel@tonic-gate }
7677c478bd9Sstevel@tonic-gate }
768