31d1499219
was hard to type and hard to fix, galloc is also hard to fix, and some things I learned will probably improve things more but make me use the original form as base (especially for space savings) * let sizeofN die though, remove even more casts * optimise, polish * regen Makefiles * sprinkle a few /* CONSTCOND */ while here
959 lines
20 KiB
C
959 lines
20 KiB
C
/* $OpenBSD: syn.c,v 1.28 2008/07/23 16:34:38 jaredy Exp $ */
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#include "sh.h"
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__RCSID("$MirOS: src/bin/mksh/syn.c,v 1.32 2008/12/13 17:02:17 tg Exp $");
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struct nesting_state {
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int start_token; /* token than began nesting (eg, FOR) */
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int start_line; /* line nesting began on */
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};
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static void yyparse(void);
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static struct op *pipeline(int);
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static struct op *andor(void);
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static struct op *c_list(int);
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static struct ioword *synio(int);
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static struct op *nested(int, int, int);
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static struct op *get_command(int);
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static struct op *dogroup(void);
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static struct op *thenpart(void);
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static struct op *elsepart(void);
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static struct op *caselist(void);
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static struct op *casepart(int);
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static struct op *function_body(char *, int);
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static char **wordlist(void);
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static struct op *block(int, struct op *, struct op *, char **);
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static struct op *newtp(int);
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static void syntaxerr(const char *)
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__attribute__((noreturn));
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static void nesting_push(struct nesting_state *, int);
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static void nesting_pop(struct nesting_state *);
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static int assign_command(char *);
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static int inalias(struct source *);
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static int dbtestp_isa(Test_env *, Test_meta);
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static const char *dbtestp_getopnd(Test_env *, Test_op, bool);
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static int dbtestp_eval(Test_env *, Test_op, const char *,
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const char *, bool);
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static void dbtestp_error(Test_env *, int, const char *)
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__attribute__((noreturn));
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static struct op *outtree; /* yyparse output */
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static struct nesting_state nesting; /* \n changed to ; */
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static int reject; /* token(cf) gets symbol again */
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static int symbol; /* yylex value */
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#define REJECT (reject = 1)
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#define ACCEPT (reject = 0)
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#define token(cf) ((reject) ? (ACCEPT, symbol) : (symbol = yylex(cf)))
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#define tpeek(cf) ((reject) ? (symbol) : (REJECT, symbol = yylex(cf)))
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#define musthave(c,cf) do { if (token(cf) != (c)) syntaxerr(NULL); } while (0)
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static void
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yyparse(void)
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{
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int c;
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ACCEPT;
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outtree = c_list(source->type == SSTRING);
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c = tpeek(0);
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if (c == 0 && !outtree)
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outtree = newtp(TEOF);
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else if (c != '\n' && c != 0)
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syntaxerr(NULL);
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}
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static struct op *
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pipeline(int cf)
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{
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struct op *t, *p, *tl = NULL;
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t = get_command(cf);
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if (t != NULL) {
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while (token(0) == '|') {
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if ((p = get_command(CONTIN)) == NULL)
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syntaxerr(NULL);
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if (tl == NULL)
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t = tl = block(TPIPE, t, p, NOWORDS);
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else
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tl = tl->right = block(TPIPE, tl->right, p, NOWORDS);
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}
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REJECT;
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}
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return (t);
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}
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static struct op *
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andor(void)
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{
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struct op *t, *p;
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int c;
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t = pipeline(0);
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if (t != NULL) {
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while ((c = token(0)) == LOGAND || c == LOGOR) {
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if ((p = pipeline(CONTIN)) == NULL)
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syntaxerr(NULL);
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t = block(c == LOGAND? TAND: TOR, t, p, NOWORDS);
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}
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REJECT;
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}
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return (t);
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}
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static struct op *
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c_list(int multi)
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{
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struct op *t = NULL, *p, *tl = NULL;
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int c;
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int have_sep;
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while (1) {
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p = andor();
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/* Token has always been read/rejected at this point, so
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* we don't worry about what flags to pass token()
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*/
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c = token(0);
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have_sep = 1;
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if (c == '\n' && (multi || inalias(source))) {
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if (!p) /* ignore blank lines */
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continue;
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} else if (!p)
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break;
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else if (c == '&' || c == COPROC)
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p = block(c == '&' ? TASYNC : TCOPROC,
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p, NOBLOCK, NOWORDS);
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else if (c != ';')
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have_sep = 0;
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if (!t)
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t = p;
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else if (!tl)
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t = tl = block(TLIST, t, p, NOWORDS);
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else
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tl = tl->right = block(TLIST, tl->right, p, NOWORDS);
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if (!have_sep)
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break;
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}
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REJECT;
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return t;
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}
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static struct ioword *
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synio(int cf)
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{
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struct ioword *iop;
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static struct ioword *nextiop = NULL;
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int ishere;
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if (nextiop != NULL) {
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iop = nextiop;
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nextiop = NULL;
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return (iop);
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}
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if (tpeek(cf) != REDIR)
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return (NULL);
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ACCEPT;
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iop = yylval.iop;
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ishere = (iop->flag&IOTYPE) == IOHERE;
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musthave(LWORD, ishere ? HEREDELIM : 0);
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if (ishere) {
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iop->delim = yylval.cp;
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if (*ident != 0) /* unquoted */
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iop->flag |= IOEVAL;
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if (herep > &heres[HERES - 1])
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yyerror("too many <<s\n");
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*herep++ = iop;
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} else
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iop->name = yylval.cp;
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if (iop->flag & IOBASH) {
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char *cp;
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nextiop = alloc(sizeof (*iop), ATEMP);
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nextiop->name = cp = alloc(5, ATEMP);
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if (iop->unit > 9) {
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*cp++ = CHAR;
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*cp++ = '0' + (iop->unit / 10);
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}
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*cp++ = CHAR;
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*cp++ = '0' + (iop->unit % 10);
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*cp = EOS;
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iop->flag &= ~IOBASH;
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nextiop->unit = 2;
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nextiop->flag = IODUP;
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nextiop->delim = NULL;
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nextiop->heredoc = NULL;
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}
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return (iop);
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}
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static struct op *
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nested(int type, int smark, int emark)
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{
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struct op *t;
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struct nesting_state old_nesting;
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nesting_push(&old_nesting, smark);
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t = c_list(true);
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musthave(emark, KEYWORD|ALIAS);
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nesting_pop(&old_nesting);
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return (block(type, t, NOBLOCK, NOWORDS));
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}
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static struct op *
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get_command(int cf)
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{
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struct op *t;
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int c, iopn = 0, syniocf;
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struct ioword *iop, **iops;
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XPtrV args, vars;
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struct nesting_state old_nesting;
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iops = alloc((NUFILE + 1) * sizeof (struct ioword *), ATEMP);
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XPinit(args, 16);
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XPinit(vars, 16);
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syniocf = KEYWORD|ALIAS;
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switch (c = token(cf|KEYWORD|ALIAS|VARASN)) {
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default:
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REJECT;
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afree(iops, ATEMP);
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XPfree(args);
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XPfree(vars);
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return NULL; /* empty line */
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case LWORD:
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case REDIR:
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REJECT;
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syniocf &= ~(KEYWORD|ALIAS);
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t = newtp(TCOM);
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t->lineno = source->line;
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while (1) {
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cf = (t->u.evalflags ? ARRAYVAR : 0) |
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(XPsize(args) == 0 ? ALIAS|VARASN : CMDWORD);
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switch (tpeek(cf)) {
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case REDIR:
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while ((iop = synio(cf)) != NULL) {
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if (iopn >= NUFILE)
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yyerror("too many redirections\n");
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iops[iopn++] = iop;
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}
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break;
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case LWORD:
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ACCEPT;
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/* the iopn == 0 and XPsize(vars) == 0 are
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* dubious but at&t ksh acts this way
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*/
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if (iopn == 0 && XPsize(vars) == 0 &&
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XPsize(args) == 0 &&
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assign_command(ident))
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t->u.evalflags = DOVACHECK;
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if ((XPsize(args) == 0 || Flag(FKEYWORD)) &&
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is_wdvarassign(yylval.cp))
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XPput(vars, yylval.cp);
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else
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XPput(args, yylval.cp);
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break;
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case '(':
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/* Check for "> foo (echo hi)" which at&t ksh
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* allows (not POSIX, but not disallowed)
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*/
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afree(t, ATEMP);
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if (XPsize(args) == 0 && XPsize(vars) == 0) {
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ACCEPT;
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goto Subshell;
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}
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if ((XPsize(args) == 0 || Flag(FKEYWORD)) &&
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XPsize(vars) == 1 && is_wdvarassign(yylval.cp))
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goto is_wdarrassign;
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/* Must be a function */
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if (iopn != 0 || XPsize(args) != 1 ||
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XPsize(vars) != 0)
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syntaxerr(NULL);
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ACCEPT;
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/*(*/
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musthave(')', 0);
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t = function_body(XPptrv(args)[0], false);
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goto Leave;
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is_wdarrassign:
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{
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static const char set_cmd0[] = {
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CHAR, 'e', CHAR, 'v',
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CHAR, 'a', CHAR, 'l', EOS
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};
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static const char set_cmd1[] = {
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CHAR, 's', CHAR, 'e',
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CHAR, 't', CHAR, ' ',
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CHAR, '-', CHAR, 'A', EOS
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};
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static const char set_cmd2[] = {
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CHAR, '-', CHAR, '-', EOS
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};
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char *tcp;
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XPfree(vars);
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XPinit(vars, 16);
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/*
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* we know (or rather hope) that yylval.cp
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* contains a string "varname="
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*/
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tcp = wdcopy(yylval.cp, ATEMP);
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tcp[wdscan(tcp, EOS) - tcp - 3] = EOS;
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/* now make an array assignment command */
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t = newtp(TCOM);
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t->lineno = source->line;
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ACCEPT;
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XPput(args, wdcopy(set_cmd0, ATEMP));
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XPput(args, wdcopy(set_cmd1, ATEMP));
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XPput(args, tcp);
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XPput(args, wdcopy(set_cmd2, ATEMP));
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musthave(LWORD,LETARRAY);
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XPput(args, yylval.cp);
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break;
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}
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default:
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goto Leave;
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}
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}
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Leave:
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break;
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Subshell:
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case '(':
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t = nested(TPAREN, '(', ')');
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break;
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case '{': /*}*/
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t = nested(TBRACE, '{', '}');
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break;
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case MDPAREN:
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{
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static const char let_cmd[] = {
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CHAR, 'l', CHAR, 'e',
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CHAR, 't', EOS
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};
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/* Leave KEYWORD in syniocf (allow if (( 1 )) then ...) */
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t = newtp(TCOM);
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t->lineno = source->line;
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ACCEPT;
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XPput(args, wdcopy(let_cmd, ATEMP));
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musthave(LWORD,LETEXPR);
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XPput(args, yylval.cp);
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break;
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}
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case DBRACKET: /* [[ .. ]] */
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/* Leave KEYWORD in syniocf (allow if [[ -n 1 ]] then ...) */
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t = newtp(TDBRACKET);
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ACCEPT;
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{
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Test_env te;
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te.flags = TEF_DBRACKET;
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te.pos.av = &args;
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te.isa = dbtestp_isa;
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te.getopnd = dbtestp_getopnd;
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te.eval = dbtestp_eval;
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te.error = dbtestp_error;
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test_parse(&te);
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}
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break;
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case FOR:
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case SELECT:
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t = newtp((c == FOR) ? TFOR : TSELECT);
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musthave(LWORD, ARRAYVAR);
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if (!is_wdvarname(yylval.cp, true))
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yyerror("%s: bad identifier\n",
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c == FOR ? "for" : "select");
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strdupx(t->str, ident, ATEMP);
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nesting_push(&old_nesting, c);
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t->vars = wordlist();
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t->left = dogroup();
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nesting_pop(&old_nesting);
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break;
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case WHILE:
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case UNTIL:
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nesting_push(&old_nesting, c);
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t = newtp((c == WHILE) ? TWHILE : TUNTIL);
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t->left = c_list(true);
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t->right = dogroup();
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nesting_pop(&old_nesting);
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break;
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case CASE:
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t = newtp(TCASE);
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musthave(LWORD, 0);
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t->str = yylval.cp;
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nesting_push(&old_nesting, c);
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t->left = caselist();
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nesting_pop(&old_nesting);
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break;
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case IF:
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nesting_push(&old_nesting, c);
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t = newtp(TIF);
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t->left = c_list(true);
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t->right = thenpart();
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musthave(FI, KEYWORD|ALIAS);
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nesting_pop(&old_nesting);
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break;
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case BANG:
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syniocf &= ~(KEYWORD|ALIAS);
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t = pipeline(0);
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if (t == NULL)
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syntaxerr(NULL);
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t = block(TBANG, NOBLOCK, t, NOWORDS);
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break;
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case TIME:
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syniocf &= ~(KEYWORD|ALIAS);
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t = pipeline(0);
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if (t) {
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t->str = alloc(2, ATEMP);
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t->str[0] = '\0'; /* TF_* flags */
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t->str[1] = '\0';
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}
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t = block(TTIME, t, NOBLOCK, NOWORDS);
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break;
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case FUNCTION:
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musthave(LWORD, 0);
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t = function_body(yylval.cp, true);
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break;
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}
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while ((iop = synio(syniocf)) != NULL) {
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if (iopn >= NUFILE)
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yyerror("too many redirections\n");
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iops[iopn++] = iop;
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}
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if (iopn == 0) {
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afree(iops, ATEMP);
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t->ioact = NULL;
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} else {
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iops[iopn++] = NULL;
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iops = aresize(iops, iopn * sizeof (struct ioword *), ATEMP);
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t->ioact = iops;
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}
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if (t->type == TCOM || t->type == TDBRACKET) {
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XPput(args, NULL);
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t->args = (const char **)XPclose(args);
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XPput(vars, NULL);
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t->vars = (char **) XPclose(vars);
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} else {
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XPfree(args);
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XPfree(vars);
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}
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return t;
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}
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static struct op *
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dogroup(void)
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{
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int c;
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struct op *list;
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c = token(CONTIN|KEYWORD|ALIAS);
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/* A {...} can be used instead of do...done for for/select loops
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* but not for while/until loops - we don't need to check if it
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* is a while loop because it would have been parsed as part of
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* the conditional command list...
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*/
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if (c == DO)
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c = DONE;
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else if (c == '{')
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c = '}';
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else
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syntaxerr(NULL);
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list = c_list(true);
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musthave(c, KEYWORD|ALIAS);
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return list;
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}
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static struct op *
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thenpart(void)
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{
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struct op *t;
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musthave(THEN, KEYWORD|ALIAS);
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t = newtp(0);
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t->left = c_list(true);
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if (t->left == NULL)
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syntaxerr(NULL);
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t->right = elsepart();
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return (t);
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}
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static struct op *
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elsepart(void)
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{
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struct op *t;
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switch (token(KEYWORD|ALIAS|VARASN)) {
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case ELSE:
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if ((t = c_list(true)) == NULL)
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syntaxerr(NULL);
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return (t);
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case ELIF:
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t = newtp(TELIF);
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t->left = c_list(true);
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t->right = thenpart();
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return (t);
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default:
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REJECT;
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}
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return NULL;
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}
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static struct op *
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caselist(void)
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{
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struct op *t, *tl;
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int c;
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c = token(CONTIN|KEYWORD|ALIAS);
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/* A {...} can be used instead of in...esac for case statements */
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if (c == IN)
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c = ESAC;
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else if (c == '{')
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c = '}';
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else
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syntaxerr(NULL);
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t = tl = NULL;
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while ((tpeek(CONTIN|KEYWORD|ESACONLY)) != c) { /* no ALIAS here */
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struct op *tc = casepart(c);
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if (tl == NULL)
|
|
t = tl = tc, tl->right = NULL;
|
|
else
|
|
tl->right = tc, tl = tc;
|
|
}
|
|
musthave(c, KEYWORD|ALIAS);
|
|
return (t);
|
|
}
|
|
|
|
static struct op *
|
|
casepart(int endtok)
|
|
{
|
|
struct op *t;
|
|
XPtrV ptns;
|
|
|
|
XPinit(ptns, 16);
|
|
t = newtp(TPAT);
|
|
/* no ALIAS here */
|
|
if (token(CONTIN | KEYWORD) != '(')
|
|
REJECT;
|
|
do {
|
|
musthave(LWORD, 0);
|
|
XPput(ptns, yylval.cp);
|
|
} while (token(0) == '|');
|
|
REJECT;
|
|
XPput(ptns, NULL);
|
|
t->vars = (char **) XPclose(ptns);
|
|
musthave(')', 0);
|
|
|
|
t->left = c_list(true);
|
|
/* Note: Posix requires the ;; */
|
|
if ((tpeek(CONTIN|KEYWORD|ALIAS)) != endtok)
|
|
musthave(BREAK, CONTIN|KEYWORD|ALIAS);
|
|
return (t);
|
|
}
|
|
|
|
static struct op *
|
|
function_body(char *name,
|
|
int ksh_func) /* function foo { ... } vs foo() { .. } */
|
|
{
|
|
char *sname, *p;
|
|
struct op *t;
|
|
int old_func_parse;
|
|
|
|
sname = wdstrip(name, false, false);
|
|
/* Check for valid characters in name. posix and ksh93 say only
|
|
* allow [a-zA-Z_0-9] but this allows more as old pdkshs have
|
|
* allowed more (the following were never allowed:
|
|
* nul space nl tab $ ' " \ ` ( ) & | ; = < >
|
|
* C_QUOTE covers all but = and adds # [ ] ? *)
|
|
*/
|
|
for (p = sname; *p; p++)
|
|
if (ctype(*p, C_QUOTE) || *p == '=')
|
|
yyerror("%s: invalid function name\n", sname);
|
|
|
|
t = newtp(TFUNCT);
|
|
t->str = sname;
|
|
t->u.ksh_func = ksh_func;
|
|
t->lineno = source->line;
|
|
|
|
/* Note that POSIX allows only compound statements after foo(), sh and
|
|
* at&t ksh allow any command, go with the later since it shouldn't
|
|
* break anything. However, for function foo, at&t ksh only accepts
|
|
* an open-brace.
|
|
*/
|
|
if (ksh_func) {
|
|
musthave('{', CONTIN|KEYWORD|ALIAS); /* } */
|
|
REJECT;
|
|
}
|
|
|
|
old_func_parse = e->flags & EF_FUNC_PARSE;
|
|
e->flags |= EF_FUNC_PARSE;
|
|
if ((t->left = get_command(CONTIN)) == NULL) {
|
|
char *tv;
|
|
/*
|
|
* Probably something like foo() followed by eof or ;.
|
|
* This is accepted by sh and ksh88.
|
|
* To make "typeset -f foo" work reliably (so its output can
|
|
* be used as input), we pretend there is a colon here.
|
|
*/
|
|
t->left = newtp(TCOM);
|
|
t->left->args = alloc(2 * sizeof (char *), ATEMP);
|
|
t->left->args[0] = tv = alloc(3, ATEMP);
|
|
tv[0] = CHAR;
|
|
tv[1] = ':';
|
|
tv[2] = EOS;
|
|
t->left->args[1] = NULL;
|
|
t->left->vars = alloc(sizeof (char *), ATEMP);
|
|
t->left->vars[0] = NULL;
|
|
t->left->lineno = 1;
|
|
}
|
|
if (!old_func_parse)
|
|
e->flags &= ~EF_FUNC_PARSE;
|
|
|
|
return t;
|
|
}
|
|
|
|
static char **
|
|
wordlist(void)
|
|
{
|
|
int c;
|
|
XPtrV args;
|
|
|
|
XPinit(args, 16);
|
|
/* Posix does not do alias expansion here... */
|
|
if ((c = token(CONTIN|KEYWORD|ALIAS)) != IN) {
|
|
if (c != ';') /* non-POSIX, but at&t ksh accepts a ; here */
|
|
REJECT;
|
|
return NULL;
|
|
}
|
|
while ((c = token(0)) == LWORD)
|
|
XPput(args, yylval.cp);
|
|
if (c != '\n' && c != ';')
|
|
syntaxerr(NULL);
|
|
if (XPsize(args) == 0) {
|
|
XPfree(args);
|
|
return NULL;
|
|
} else {
|
|
XPput(args, NULL);
|
|
return (char **) XPclose(args);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* supporting functions
|
|
*/
|
|
|
|
static struct op *
|
|
block(int type, struct op *t1, struct op *t2, char **wp)
|
|
{
|
|
struct op *t;
|
|
|
|
t = newtp(type);
|
|
t->left = t1;
|
|
t->right = t2;
|
|
t->vars = wp;
|
|
return (t);
|
|
}
|
|
|
|
const struct tokeninfo {
|
|
const char *name;
|
|
short val;
|
|
short reserved;
|
|
} tokentab[] = {
|
|
/* Reserved words */
|
|
{ "if", IF, true },
|
|
{ "then", THEN, true },
|
|
{ "else", ELSE, true },
|
|
{ "elif", ELIF, true },
|
|
{ "fi", FI, true },
|
|
{ "case", CASE, true },
|
|
{ "esac", ESAC, true },
|
|
{ "for", FOR, true },
|
|
{ "select", SELECT, true },
|
|
{ "while", WHILE, true },
|
|
{ "until", UNTIL, true },
|
|
{ "do", DO, true },
|
|
{ "done", DONE, true },
|
|
{ "in", IN, true },
|
|
{ "function", FUNCTION, true },
|
|
{ "time", TIME, true },
|
|
{ "{", '{', true },
|
|
{ "}", '}', true },
|
|
{ "!", BANG, true },
|
|
{ "[[", DBRACKET, true },
|
|
/* Lexical tokens (0[EOF], LWORD and REDIR handled specially) */
|
|
{ "&&", LOGAND, false },
|
|
{ "||", LOGOR, false },
|
|
{ ";;", BREAK, false },
|
|
{ "((", MDPAREN, false },
|
|
{ "|&", COPROC, false },
|
|
/* and some special cases... */
|
|
{ "newline", '\n', false },
|
|
{ NULL, 0, false }
|
|
};
|
|
|
|
void
|
|
initkeywords(void)
|
|
{
|
|
struct tokeninfo const *tt;
|
|
struct tbl *p;
|
|
|
|
ktinit(&keywords, APERM, 32); /* must be 2^n (currently 20 keywords) */
|
|
for (tt = tokentab; tt->name; tt++) {
|
|
if (tt->reserved) {
|
|
p = ktenter(&keywords, tt->name, hash(tt->name));
|
|
p->flag |= DEFINED|ISSET;
|
|
p->type = CKEYWD;
|
|
p->val.i = tt->val;
|
|
}
|
|
}
|
|
}
|
|
|
|
static void
|
|
syntaxerr(const char *what)
|
|
{
|
|
char redir[6]; /* 2<<- is the longest redirection, I think */
|
|
const char *s;
|
|
struct tokeninfo const *tt;
|
|
int c;
|
|
|
|
if (!what)
|
|
what = "unexpected";
|
|
REJECT;
|
|
c = token(0);
|
|
Again:
|
|
switch (c) {
|
|
case 0:
|
|
if (nesting.start_token) {
|
|
c = nesting.start_token;
|
|
source->errline = nesting.start_line;
|
|
what = "unmatched";
|
|
goto Again;
|
|
}
|
|
/* don't quote the EOF */
|
|
yyerror("%s: unexpected EOF\n", T_synerr);
|
|
/* NOTREACHED */
|
|
|
|
case LWORD:
|
|
s = snptreef(NULL, 32, "%S", yylval.cp);
|
|
break;
|
|
|
|
case REDIR:
|
|
s = snptreef(redir, sizeof(redir), "%R", yylval.iop);
|
|
break;
|
|
|
|
default:
|
|
for (tt = tokentab; tt->name; tt++)
|
|
if (tt->val == c)
|
|
break;
|
|
if (tt->name)
|
|
s = tt->name;
|
|
else {
|
|
if (c > 0 && c < 256) {
|
|
redir[0] = c;
|
|
redir[1] = '\0';
|
|
} else
|
|
shf_snprintf(redir, sizeof(redir),
|
|
"?%d", c);
|
|
s = redir;
|
|
}
|
|
}
|
|
yyerror("%s: '%s' %s\n", T_synerr, s, what);
|
|
}
|
|
|
|
static void
|
|
nesting_push(struct nesting_state *save, int tok)
|
|
{
|
|
*save = nesting;
|
|
nesting.start_token = tok;
|
|
nesting.start_line = source->line;
|
|
}
|
|
|
|
static void
|
|
nesting_pop(struct nesting_state *saved)
|
|
{
|
|
nesting = *saved;
|
|
}
|
|
|
|
static struct op *
|
|
newtp(int type)
|
|
{
|
|
struct op *t;
|
|
|
|
t = alloc(sizeof (struct op), ATEMP);
|
|
t->type = type;
|
|
t->u.evalflags = 0;
|
|
t->args = NULL;
|
|
t->vars = NULL;
|
|
t->ioact = NULL;
|
|
t->left = t->right = NULL;
|
|
t->str = NULL;
|
|
return (t);
|
|
}
|
|
|
|
struct op *
|
|
compile(Source *s)
|
|
{
|
|
nesting.start_token = 0;
|
|
nesting.start_line = 0;
|
|
herep = heres;
|
|
source = s;
|
|
yyparse();
|
|
return outtree;
|
|
}
|
|
|
|
/* This kludge exists to take care of sh/at&t ksh oddity in which
|
|
* the arguments of alias/export/readonly/typeset have no field
|
|
* splitting, file globbing, or (normal) tilde expansion done.
|
|
* at&t ksh seems to do something similar to this since
|
|
* $ touch a=a; typeset a=[ab]; echo "$a"
|
|
* a=[ab]
|
|
* $ x=typeset; $x a=[ab]; echo "$a"
|
|
* a=a
|
|
* $
|
|
*/
|
|
static int
|
|
assign_command(char *s)
|
|
{
|
|
if (!*s)
|
|
return 0;
|
|
return (strcmp(s, "alias") == 0) ||
|
|
(strcmp(s, "export") == 0) ||
|
|
(strcmp(s, "readonly") == 0) ||
|
|
(strcmp(s, "typeset") == 0);
|
|
}
|
|
|
|
/* Check if we are in the middle of reading an alias */
|
|
static int
|
|
inalias(struct source *s)
|
|
{
|
|
for (; s && s->type == SALIAS; s = s->next)
|
|
if (!(s->flags & SF_ALIASEND))
|
|
return 1;
|
|
return 0;
|
|
}
|
|
|
|
|
|
/* Order important - indexed by Test_meta values
|
|
* Note that ||, &&, ( and ) can't appear in as unquoted strings
|
|
* in normal shell input, so these can be interpreted unambiguously
|
|
* in the evaluation pass.
|
|
*/
|
|
static const char dbtest_or[] = { CHAR, '|', CHAR, '|', EOS };
|
|
static const char dbtest_and[] = { CHAR, '&', CHAR, '&', EOS };
|
|
static const char dbtest_not[] = { CHAR, '!', EOS };
|
|
static const char dbtest_oparen[] = { CHAR, '(', EOS };
|
|
static const char dbtest_cparen[] = { CHAR, ')', EOS };
|
|
const char *const dbtest_tokens[] = {
|
|
dbtest_or, dbtest_and, dbtest_not,
|
|
dbtest_oparen, dbtest_cparen
|
|
};
|
|
const char db_close[] = { CHAR, ']', CHAR, ']', EOS };
|
|
const char db_lthan[] = { CHAR, '<', EOS };
|
|
const char db_gthan[] = { CHAR, '>', EOS };
|
|
|
|
/* Test if the current token is a whatever. Accepts the current token if
|
|
* it is. Returns 0 if it is not, non-zero if it is (in the case of
|
|
* TM_UNOP and TM_BINOP, the returned value is a Test_op).
|
|
*/
|
|
static int
|
|
dbtestp_isa(Test_env *te, Test_meta meta)
|
|
{
|
|
int c = tpeek(ARRAYVAR | (meta == TM_BINOP ? 0 : CONTIN));
|
|
int uqword;
|
|
char *save = NULL;
|
|
int ret = 0;
|
|
|
|
/* unquoted word? */
|
|
uqword = c == LWORD && *ident;
|
|
|
|
if (meta == TM_OR)
|
|
ret = c == LOGOR;
|
|
else if (meta == TM_AND)
|
|
ret = c == LOGAND;
|
|
else if (meta == TM_NOT)
|
|
ret = uqword && strcmp(yylval.cp, dbtest_tokens[(int) TM_NOT]) == 0;
|
|
else if (meta == TM_OPAREN)
|
|
ret = c == '(' /*)*/;
|
|
else if (meta == TM_CPAREN)
|
|
ret = c == /*(*/ ')';
|
|
else if (meta == TM_UNOP || meta == TM_BINOP) {
|
|
if (meta == TM_BINOP && c == REDIR &&
|
|
(yylval.iop->flag == IOREAD || yylval.iop->flag == IOWRITE)) {
|
|
ret = 1;
|
|
save = wdcopy(yylval.iop->flag == IOREAD ?
|
|
db_lthan : db_gthan, ATEMP);
|
|
} else if (uqword && (ret = test_isop(meta, ident)))
|
|
save = yylval.cp;
|
|
} else /* meta == TM_END */
|
|
ret = uqword && strcmp(yylval.cp, db_close) == 0;
|
|
if (ret) {
|
|
ACCEPT;
|
|
if (meta < NELEM(dbtest_tokens))
|
|
save = wdcopy(dbtest_tokens[(int)meta], ATEMP);
|
|
if (save)
|
|
XPput(*te->pos.av, save);
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
static const char *
|
|
dbtestp_getopnd(Test_env *te, Test_op op __unused, bool do_eval __unused)
|
|
{
|
|
int c = tpeek(ARRAYVAR);
|
|
|
|
if (c != LWORD)
|
|
return NULL;
|
|
|
|
ACCEPT;
|
|
XPput(*te->pos.av, yylval.cp);
|
|
|
|
return null;
|
|
}
|
|
|
|
static int
|
|
dbtestp_eval(Test_env *te __unused, Test_op op __unused,
|
|
const char *opnd1 __unused, const char *opnd2 __unused,
|
|
bool do_eval __unused)
|
|
{
|
|
return 1;
|
|
}
|
|
|
|
static void
|
|
dbtestp_error(Test_env *te, int offset, const char *msg)
|
|
{
|
|
te->flags |= TEF_ERROR;
|
|
|
|
if (offset < 0) {
|
|
REJECT;
|
|
/* Kludgy to say the least... */
|
|
symbol = LWORD;
|
|
yylval.cp = *(XPptrv(*te->pos.av) + XPsize(*te->pos.av) +
|
|
offset);
|
|
}
|
|
syntaxerr(msg);
|
|
}
|