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-rw-r--r--bin/ksh/syn.c897
1 files changed, 897 insertions, 0 deletions
diff --git a/bin/ksh/syn.c b/bin/ksh/syn.c
new file mode 100644
index 0000000..690d213
--- /dev/null
+++ b/bin/ksh/syn.c
@@ -0,0 +1,897 @@
+/* $OpenBSD: syn.c,v 1.38 2015/12/30 09:07:00 tedu Exp $ */
+
+/*
+ * shell parser (C version)
+ */
+
+#include <string.h>
+
+#include "sh.h"
+#include "c_test.h"
+
+struct nesting_state {
+ int start_token; /* token than began nesting (eg, FOR) */
+ int start_line; /* line nesting began on */
+};
+
+static void yyparse(void);
+static struct op *pipeline(int);
+static struct op *andor(void);
+static struct op *c_list(int);
+static struct ioword *synio(int);
+static void musthave(int, int);
+static struct op *nested(int, int, int);
+static struct op *get_command(int);
+static struct op *dogroup(void);
+static struct op *thenpart(void);
+static struct op *elsepart(void);
+static struct op *caselist(void);
+static struct op *casepart(int);
+static struct op *function_body(char *, int);
+static char ** wordlist(void);
+static struct op *block(int, struct op *, struct op *, char **);
+static struct op *newtp(int);
+static void syntaxerr(const char *) __attribute__((__noreturn__));
+static void nesting_push(struct nesting_state *, int);
+static void nesting_pop(struct nesting_state *);
+static int assign_command(char *);
+static int inalias(struct source *);
+static int dbtestp_isa(Test_env *, Test_meta);
+static const char *dbtestp_getopnd(Test_env *, Test_op, int);
+static int dbtestp_eval(Test_env *, Test_op, const char *, const char *,
+ int);
+static void dbtestp_error(Test_env *, int, const char *);
+
+static struct op *outtree; /* yyparse output */
+
+static struct nesting_state nesting; /* \n changed to ; */
+
+static int reject; /* token(cf) gets symbol again */
+static int symbol; /* yylex value */
+
+#define token(cf) \
+ ((reject) ? (reject = false, symbol) : (symbol = yylex(cf)))
+#define tpeek(cf) \
+ ((reject) ? (symbol) : (reject = true, symbol = yylex(cf)))
+
+static void
+yyparse(void)
+{
+ int c;
+
+ reject = false;
+
+ outtree = c_list(source->type == SSTRING);
+ c = tpeek(0);
+ if (c == 0 && !outtree)
+ outtree = newtp(TEOF);
+ else if (c != '\n' && c != 0)
+ syntaxerr(NULL);
+}
+
+static struct op *
+pipeline(int cf)
+{
+ struct op *t, *p, *tl = NULL;
+
+ t = get_command(cf);
+ if (t != NULL) {
+ while (token(0) == '|') {
+ if ((p = get_command(CONTIN)) == NULL)
+ syntaxerr(NULL);
+ if (tl == NULL)
+ t = tl = block(TPIPE, t, p, NULL);
+ else
+ tl = tl->right = block(TPIPE, tl->right, p, NULL);
+ }
+ reject = true;
+ }
+ return (t);
+}
+
+static struct op *
+andor(void)
+{
+ struct op *t, *p;
+ int c;
+
+ t = pipeline(0);
+ if (t != NULL) {
+ while ((c = token(0)) == LOGAND || c == LOGOR) {
+ if ((p = pipeline(CONTIN)) == NULL)
+ syntaxerr(NULL);
+ t = block(c == LOGAND? TAND: TOR, t, p, NULL);
+ }
+ reject = true;
+ }
+ return (t);
+}
+
+static struct op *
+c_list(int multi)
+{
+ struct op *t = NULL, *p, *tl = NULL;
+ int c;
+ int have_sep;
+
+ while (1) {
+ p = andor();
+ /* Token has always been read/rejected at this point, so
+ * we don't worry about what flags to pass token()
+ */
+ c = token(0);
+ have_sep = 1;
+ if (c == '\n' && (multi || inalias(source))) {
+ if (!p) /* ignore blank lines */
+ continue;
+ } else if (!p)
+ break;
+ else if (c == '&' || c == COPROC)
+ p = block(c == '&' ? TASYNC : TCOPROC,
+ p, NULL, NULL);
+ else if (c != ';')
+ have_sep = 0;
+ if (!t)
+ t = p;
+ else if (!tl)
+ t = tl = block(TLIST, t, p, NULL);
+ else
+ tl = tl->right = block(TLIST, tl->right, p, NULL);
+ if (!have_sep)
+ break;
+ }
+ reject = true;
+ return t;
+}
+
+static struct ioword *
+synio(int cf)
+{
+ struct ioword *iop;
+ int ishere;
+
+ if (tpeek(cf) != REDIR)
+ return NULL;
+ reject = false;
+ iop = yylval.iop;
+ ishere = (iop->flag&IOTYPE) == IOHERE;
+ musthave(LWORD, ishere ? HEREDELIM : 0);
+ if (ishere) {
+ iop->delim = yylval.cp;
+ if (*ident != 0) /* unquoted */
+ iop->flag |= IOEVAL;
+ if (herep >= &heres[HERES])
+ yyerror("too many <<'s\n");
+ *herep++ = iop;
+ } else
+ iop->name = yylval.cp;
+ return iop;
+}
+
+static void
+musthave(int c, int cf)
+{
+ if ((token(cf)) != c)
+ syntaxerr(NULL);
+}
+
+static struct op *
+nested(int type, int smark, int emark)
+{
+ struct op *t;
+ struct nesting_state old_nesting;
+
+ nesting_push(&old_nesting, smark);
+ t = c_list(true);
+ musthave(emark, KEYWORD|ALIAS);
+ nesting_pop(&old_nesting);
+ return (block(type, t, NULL, NULL));
+}
+
+static struct op *
+get_command(int cf)
+{
+ struct op *t;
+ int c, iopn = 0, syniocf;
+ struct ioword *iop, **iops;
+ XPtrV args, vars;
+ struct nesting_state old_nesting;
+
+ iops = areallocarray(NULL, NUFILE + 1,
+ sizeof(struct ioword *), ATEMP);
+ XPinit(args, 16);
+ XPinit(vars, 16);
+
+ syniocf = KEYWORD|ALIAS;
+ switch (c = token(cf|KEYWORD|ALIAS|VARASN)) {
+ default:
+ reject = true;
+ afree(iops, ATEMP);
+ XPfree(args);
+ XPfree(vars);
+ return NULL; /* empty line */
+
+ case LWORD:
+ case REDIR:
+ reject = true;
+ syniocf &= ~(KEYWORD|ALIAS);
+ t = newtp(TCOM);
+ t->lineno = source->line;
+ while (1) {
+ cf = (t->u.evalflags ? ARRAYVAR : 0) |
+ (XPsize(args) == 0 ? ALIAS|VARASN : CMDWORD);
+ switch (tpeek(cf)) {
+ case REDIR:
+ if (iopn >= NUFILE)
+ yyerror("too many redirections\n");
+ iops[iopn++] = synio(cf);
+ break;
+
+ case LWORD:
+ reject = false;
+ /* the iopn == 0 and XPsize(vars) == 0 are
+ * dubious but at&t ksh acts this way
+ */
+ if (iopn == 0 && XPsize(vars) == 0 &&
+ XPsize(args) == 0 &&
+ assign_command(ident))
+ t->u.evalflags = DOVACHECK;
+ if ((XPsize(args) == 0 || Flag(FKEYWORD)) &&
+ is_wdvarassign(yylval.cp))
+ XPput(vars, yylval.cp);
+ else
+ XPput(args, yylval.cp);
+ break;
+
+ case '(':
+ /* Check for "> foo (echo hi)", which at&t ksh
+ * allows (not POSIX, but not disallowed)
+ */
+ afree(t, ATEMP);
+ if (XPsize(args) == 0 && XPsize(vars) == 0) {
+ reject = false;
+ goto Subshell;
+ }
+ /* Must be a function */
+ if (iopn != 0 || XPsize(args) != 1 ||
+ XPsize(vars) != 0)
+ syntaxerr(NULL);
+ reject = false;
+ /*(*/
+ musthave(')', 0);
+ t = function_body(XPptrv(args)[0], false);
+ goto Leave;
+
+ default:
+ goto Leave;
+ }
+ }
+ Leave:
+ break;
+
+ Subshell:
+ case '(':
+ t = nested(TPAREN, '(', ')');
+ break;
+
+ case '{': /*}*/
+ t = nested(TBRACE, '{', '}');
+ break;
+
+ case MDPAREN:
+ {
+ static const char let_cmd[] = {
+ CHAR, 'l', CHAR, 'e',
+ CHAR, 't', EOS
+ };
+ /* Leave KEYWORD in syniocf (allow if (( 1 )) then ...) */
+ t = newtp(TCOM);
+ t->lineno = source->line;
+ reject = false;
+ XPput(args, wdcopy(let_cmd, ATEMP));
+ musthave(LWORD,LETEXPR);
+ XPput(args, yylval.cp);
+ break;
+ }
+
+ case DBRACKET: /* [[ .. ]] */
+ /* Leave KEYWORD in syniocf (allow if [[ -n 1 ]] then ...) */
+ t = newtp(TDBRACKET);
+ reject = false;
+ {
+ Test_env te;
+
+ te.flags = TEF_DBRACKET;
+ te.pos.av = &args;
+ te.isa = dbtestp_isa;
+ te.getopnd = dbtestp_getopnd;
+ te.eval = dbtestp_eval;
+ te.error = dbtestp_error;
+
+ test_parse(&te);
+ }
+ break;
+
+ case FOR:
+ case SELECT:
+ t = newtp((c == FOR) ? TFOR : TSELECT);
+ musthave(LWORD, ARRAYVAR);
+ if (!is_wdvarname(yylval.cp, true))
+ yyerror("%s: bad identifier\n",
+ c == FOR ? "for" : "select");
+ t->str = str_save(ident, ATEMP);
+ nesting_push(&old_nesting, c);
+ t->vars = wordlist();
+ t->left = dogroup();
+ nesting_pop(&old_nesting);
+ break;
+
+ case WHILE:
+ case UNTIL:
+ nesting_push(&old_nesting, c);
+ t = newtp((c == WHILE) ? TWHILE : TUNTIL);
+ t->left = c_list(true);
+ t->right = dogroup();
+ nesting_pop(&old_nesting);
+ break;
+
+ case CASE:
+ t = newtp(TCASE);
+ musthave(LWORD, 0);
+ t->str = yylval.cp;
+ nesting_push(&old_nesting, c);
+ t->left = caselist();
+ nesting_pop(&old_nesting);
+ break;
+
+ case IF:
+ nesting_push(&old_nesting, c);
+ t = newtp(TIF);
+ t->left = c_list(true);
+ t->right = thenpart();
+ musthave(FI, KEYWORD|ALIAS);
+ nesting_pop(&old_nesting);
+ break;
+
+ case BANG:
+ syniocf &= ~(KEYWORD|ALIAS);
+ t = pipeline(0);
+ if (t == NULL)
+ syntaxerr(NULL);
+ t = block(TBANG, NULL, t, NULL);
+ break;
+
+ case TIME:
+ syniocf &= ~(KEYWORD|ALIAS);
+ t = pipeline(0);
+ if (t) {
+ t->str = alloc(2, ATEMP);
+ t->str[0] = '\0'; /* TF_* flags */
+ t->str[1] = '\0';
+ }
+ t = block(TTIME, t, NULL, NULL);
+ break;
+
+ case FUNCTION:
+ musthave(LWORD, 0);
+ t = function_body(yylval.cp, true);
+ break;
+ }
+
+ while ((iop = synio(syniocf)) != NULL) {
+ if (iopn >= NUFILE)
+ yyerror("too many redirections\n");
+ iops[iopn++] = iop;
+ }
+
+ if (iopn == 0) {
+ afree(iops, ATEMP);
+ t->ioact = NULL;
+ } else {
+ iops[iopn++] = NULL;
+ iops = areallocarray(iops, iopn,
+ sizeof(struct ioword *), ATEMP);
+ t->ioact = iops;
+ }
+
+ if (t->type == TCOM || t->type == TDBRACKET) {
+ XPput(args, NULL);
+ t->args = (char **) XPclose(args);
+ XPput(vars, NULL);
+ t->vars = (char **) XPclose(vars);
+ } else {
+ XPfree(args);
+ XPfree(vars);
+ }
+
+ return t;
+}
+
+static struct op *
+dogroup(void)
+{
+ int c;
+ struct op *list;
+
+ c = token(CONTIN|KEYWORD|ALIAS);
+ /* A {...} can be used instead of do...done for for/select loops
+ * but not for while/until loops - we don't need to check if it
+ * is a while loop because it would have been parsed as part of
+ * the conditional command list...
+ */
+ if (c == DO)
+ c = DONE;
+ else if (c == '{')
+ c = '}';
+ else
+ syntaxerr(NULL);
+ list = c_list(true);
+ musthave(c, KEYWORD|ALIAS);
+ return list;
+}
+
+static struct op *
+thenpart(void)
+{
+ struct op *t;
+
+ musthave(THEN, KEYWORD|ALIAS);
+ t = newtp(0);
+ t->left = c_list(true);
+ if (t->left == NULL)
+ syntaxerr(NULL);
+ t->right = elsepart();
+ return (t);
+}
+
+static struct op *
+elsepart(void)
+{
+ struct op *t;
+
+ switch (token(KEYWORD|ALIAS|VARASN)) {
+ case ELSE:
+ if ((t = c_list(true)) == NULL)
+ syntaxerr(NULL);
+ return (t);
+
+ case ELIF:
+ t = newtp(TELIF);
+ t->left = c_list(true);
+ t->right = thenpart();
+ return (t);
+
+ default:
+ reject = true;
+ }
+ return NULL;
+}
+
+static struct op *
+caselist(void)
+{
+ struct op *t, *tl;
+ int c;
+
+ c = token(CONTIN|KEYWORD|ALIAS);
+ /* A {...} can be used instead of in...esac for case statements */
+ if (c == IN)
+ c = ESAC;
+ else if (c == '{')
+ c = '}';
+ else
+ syntaxerr(NULL);
+ t = tl = NULL;
+ while ((tpeek(CONTIN|KEYWORD|ESACONLY)) != c) { /* no ALIAS here */
+ struct op *tc = casepart(c);
+ 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;
+ int c;
+ XPtrV ptns;
+
+ XPinit(ptns, 16);
+ t = newtp(TPAT);
+ c = token(CONTIN|KEYWORD); /* no ALIAS here */
+ if (c != '(')
+ reject = true;
+ do {
+ musthave(LWORD, 0);
+ XPput(ptns, yylval.cp);
+ } while ((c = token(0)) == '|');
+ reject = true;
+ 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);
+ /* Check for valid characters in name. posix and ksh93 say only
+ * allow [a-zA-Z_0-9] but this allows more as old pdksh's 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 = true;
+ }
+
+ old_func_parse = genv->flags & EF_FUNC_PARSE;
+ genv->flags |= EF_FUNC_PARSE;
+ if ((t->left = get_command(CONTIN)) == NULL) {
+ /*
+ * 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 = areallocarray(NULL, 2, sizeof(char *), ATEMP);
+ t->left->args[0] = alloc(3, ATEMP);
+ t->left->args[0][0] = CHAR;
+ t->left->args[0][1] = ':';
+ t->left->args[0][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)
+ genv->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 = true;
+ return NULL;
+ }
+ while ((c = token(0)) == LWORD)
+ XPput(args, yylval.cp);
+ if (c != '\n' && c != ';')
+ syntaxerr(NULL);
+ 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 },
+ { 0 }
+};
+
+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 = true;
+ 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("syntax error: unexpected EOF\n");
+ /* 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("syntax error: `%s' %s\n", 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(*t), ATEMP);
+ t->type = type;
+ t->u.evalflags = 0;
+ t->args = 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 (Flag(FPOSIX) || !*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 = 0;
+ 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 = (int) test_isop(te, meta, ident)))
+ save = yylval.cp;
+ } else /* meta == TM_END */
+ ret = uqword && strcmp(yylval.cp, db_close) == 0;
+ if (ret) {
+ reject = false;
+ if (meta != TM_END) {
+ if (!save)
+ save = wdcopy(dbtest_tokens[(int) meta], ATEMP);
+ XPput(*te->pos.av, save);
+ }
+ }
+ return ret;
+}
+
+static const char *
+dbtestp_getopnd(Test_env *te, Test_op op, int do_eval)
+{
+ int c = tpeek(ARRAYVAR);
+
+ if (c != LWORD)
+ return NULL;
+
+ reject = false;
+ XPput(*te->pos.av, yylval.cp);
+
+ return null;
+}
+
+static int
+dbtestp_eval(Test_env *te, Test_op op, const char *opnd1, const char *opnd2,
+ int do_eval)
+{
+ return 1;
+}
+
+static void
+dbtestp_error(Test_env *te, int offset, const char *msg)
+{
+ te->flags |= TEF_ERROR;
+
+ if (offset < 0) {
+ reject = true;
+ /* Kludgy to say the least... */
+ symbol = LWORD;
+ yylval.cp = *(XPptrv(*te->pos.av) + XPsize(*te->pos.av) +
+ offset);
+ }
+ syntaxerr(msg);
+}