/*-
* Copyright (c) 2003, 2004, 2005, 2006, 2007, 2008, 2009,
- * 2011, 2012, 2013, 2014, 2015, 2016
+ * 2011, 2012, 2013, 2014, 2015, 2016, 2017,
+ * 2018
* mirabilos <m@mirbsd.org>
*
* Provided that these terms and disclaimer and all copyright notices
#include "sh.h"
-__RCSID("$MirOS: src/bin/mksh/syn.c,v 1.115 2016/09/01 12:59:12 tg Exp $");
+__RCSID("$MirOS: src/bin/mksh/syn.c,v 1.127 2018/01/14 00:22:30 tg Exp $");
struct nesting_state {
int start_token; /* token than began nesting (eg, FOR) */
struct yyrecursive_state *next;
struct ioword **old_herep;
int old_symbol;
- int old_salias;
- int old_nesting_type;
+ unsigned int old_nesting_type;
bool old_reject;
};
-static void yyparse(void);
-static struct op *pipeline(int);
-static struct op *andor(void);
-static struct op *c_list(bool);
+static void yyparse(bool);
+static struct op *pipeline(int, int);
+static struct op *andor(int);
+static struct op *c_list(int, bool);
static struct ioword *synio(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 *, bool);
-static char **wordlist(void);
+static struct op *nested(int, int, int, int);
+static struct op *get_command(int, int);
+static struct op *dogroup(int);
+static struct op *thenpart(int);
+static struct op *elsepart(int);
+static struct op *caselist(int);
+static struct op *casepart(int, int);
+static struct op *function_body(char *, int, bool);
+static char **wordlist(int);
static struct op *block(int, struct op *, struct op *);
static struct op *newtp(int);
static void syntaxerr(const char *) MKSH_A_NORETURN;
static bool reject; /* token(cf) gets symbol again */
static int symbol; /* yylex value */
-static int sALIAS = ALIAS; /* 0 in yyrecursive */
#define REJECT (reject = true)
#define ACCEPT (reject = false)
#define token(cf) ((reject) ? (ACCEPT, symbol) : (symbol = yylex(cf)))
#define tpeek(cf) ((reject) ? (symbol) : (REJECT, symbol = yylex(cf)))
-#define musthave(c,cf) do { if (token(cf) != (c)) syntaxerr(NULL); } while (/* CONSTCOND */ 0)
+#define musthave(c,cf) do { \
+ if ((unsigned int)token(cf) != (unsigned int)(c)) \
+ syntaxerr(NULL); \
+} while (/* CONSTCOND */ 0)
static const char Tcbrace[] = "}";
static const char Tesac[] = "esac";
static void
-yyparse(void)
+yyparse(bool doalias)
{
int c;
ACCEPT;
- outtree = c_list(source->type == SSTRING);
+ outtree = c_list(doalias ? ALIAS : 0, source->type == SSTRING);
c = tpeek(0);
if (c == 0 && !outtree)
outtree = newtp(TEOF);
- else if (c != '\n' && c != 0)
+ else if (!cinttype(c, C_LF | C_NUL))
syntaxerr(NULL);
}
static struct op *
-pipeline(int cf)
+pipeline(int cf, int sALIAS)
{
struct op *t, *p, *tl = NULL;
- t = get_command(cf);
+ t = get_command(cf, sALIAS);
if (t != NULL) {
while (token(0) == '|') {
- if ((p = get_command(CONTIN)) == NULL)
+ if ((p = get_command(CONTIN, sALIAS)) == NULL)
syntaxerr(NULL);
if (tl == NULL)
t = tl = block(TPIPE, t, p);
}
static struct op *
-andor(void)
+andor(int sALIAS)
{
struct op *t, *p;
int c;
- t = pipeline(0);
+ t = pipeline(0, sALIAS);
if (t != NULL) {
while ((c = token(0)) == LOGAND || c == LOGOR) {
- if ((p = pipeline(CONTIN)) == NULL)
+ if ((p = pipeline(CONTIN, sALIAS)) == NULL)
syntaxerr(NULL);
t = block(c == LOGAND? TAND: TOR, t, p);
}
}
static struct op *
-c_list(bool multi)
+c_list(int sALIAS, bool multi)
{
struct op *t = NULL, *p, *tl = NULL;
int c;
bool have_sep;
while (/* CONSTCOND */ 1) {
- p = andor();
+ p = andor(sALIAS);
/*
* Token has always been read/rejected at this point, so
* we don't worry about what flags to pass token()
}
static struct op *
-nested(int type, int smark, int emark)
+nested(int type, int smark, int emark, int sALIAS)
{
struct op *t;
struct nesting_state old_nesting;
nesting_push(&old_nesting, smark);
- t = c_list(true);
+ t = c_list(sALIAS, true);
musthave(emark, KEYWORD|sALIAS);
nesting_pop(&old_nesting);
return (block(type, t, NULL));
}
+static const char builtin_cmd[] = {
+ QCHAR, '\\', CHAR, 'b', CHAR, 'u', CHAR, 'i',
+ CHAR, 'l', CHAR, 't', CHAR, 'i', CHAR, 'n', EOS
+};
static const char let_cmd[] = {
- QCHAR, 'l', CHAR, 'e', CHAR, 't', CHAR, ']', EOS
+ CHAR, 'l', CHAR, 'e', CHAR, 't', EOS
};
static const char setA_cmd0[] = {
- QCHAR, 's', CHAR, 'e', CHAR, 't', EOS
+ CHAR, 's', CHAR, 'e', CHAR, 't', EOS
};
static const char setA_cmd1[] = {
CHAR, '-', CHAR, 'A', EOS
};
static struct op *
-get_command(int cf)
+get_command(int cf, int sALIAS)
{
struct op *t;
int c, iopn = 0, syniocf, lno;
t->lineno = source->line;
goto get_command_start;
while (/* CONSTCOND */ 1) {
- bool check_assign_cmd;
+ bool check_decl_utility;
if (XPsize(args) == 0) {
get_command_start:
- check_assign_cmd = true;
+ check_decl_utility = true;
cf = sALIAS | CMDASN;
} else if (t->u.evalflags)
cf = CMDWORD | CMDASN;
case LWORD:
ACCEPT;
- /*
- * the iopn == 0 and XPsize(vars) == 0 are
- * dubious but AT&T ksh acts this way
- */
- if (iopn == 0 && XPsize(vars) == 0 &&
- check_assign_cmd) {
- if (assign_command(ident, false))
+ if (check_decl_utility) {
+ struct tbl *tt = get_builtin(ident);
+ uint32_t flag;
+
+ flag = tt ? tt->flag : 0;
+ if (flag & DECL_UTIL)
t->u.evalflags = DOVACHECK;
- else if (strcmp(ident, Tcommand) != 0)
- check_assign_cmd = false;
+ if (!(flag & DECL_FWDR))
+ check_decl_utility = false;
}
if ((XPsize(args) == 0 || Flag(FKEYWORD)) &&
is_wdvarassign(yylval.cp))
XPput(args, yylval.cp);
break;
- case '(' /*)*/:
+ case ORD('(' /*)*/):
if (XPsize(args) == 0 && XPsize(vars) == 1 &&
is_wdvarassign(yylval.cp)) {
char *tcp;
tcp[wdscan(tcp, EOS) - tcp - 3] = EOS;
/* construct new args strings */
+ XPput(args, wdcopy(builtin_cmd, ATEMP));
XPput(args, wdcopy(setA_cmd0, ATEMP));
XPput(args, wdcopy(setA_cmd1, ATEMP));
XPput(args, tcp);
XPsize(vars) != 0)
syntaxerr(NULL);
ACCEPT;
- musthave(/*(*/')', 0);
- t = function_body(XPptrv(args)[0], false);
+ musthave(/*(*/ ')', 0);
+ t = function_body(XPptrv(args)[0],
+ sALIAS, false);
}
goto Leave;
Leave:
break;
- case '(': /*)*/ {
- int subshell_nesting_type_saved;
+ case ORD('(' /*)*/): {
+ unsigned int subshell_nesting_type_saved;
Subshell:
subshell_nesting_type_saved = subshell_nesting_type;
- subshell_nesting_type = ')';
- t = nested(TPAREN, '(', ')');
+ subshell_nesting_type = ORD(')');
+ t = nested(TPAREN, ORD('('), ORD(')'), sALIAS);
subshell_nesting_type = subshell_nesting_type_saved;
break;
}
- case '{': /*}*/
- t = nested(TBRACE, '{', '}');
+ case ORD('{' /*}*/):
+ t = nested(TBRACE, ORD('{'), ORD('}'), sALIAS);
break;
case MDPAREN:
switch (token(LETEXPR)) {
case LWORD:
break;
- case '(': /*)*/
- c = '(';
+ case ORD('(' /*)*/):
+ c = ORD('(');
goto Subshell;
default:
syntaxerr(NULL);
}
t = newtp(TCOM);
t->lineno = lno;
+ XPput(args, wdcopy(builtin_cmd, ATEMP));
XPput(args, wdcopy(let_cmd, ATEMP));
XPput(args, yylval.cp);
break;
t = newtp((c == FOR) ? TFOR : TSELECT);
musthave(LWORD, CMDASN);
if (!is_wdvarname(yylval.cp, true))
- yyerror("%s: bad identifier\n",
+ yyerror("%s: bad identifier",
c == FOR ? "for" : Tselect);
strdupx(t->str, ident, ATEMP);
nesting_push(&old_nesting, c);
- t->vars = wordlist();
- t->left = dogroup();
+ t->vars = wordlist(sALIAS);
+ t->left = dogroup(sALIAS);
nesting_pop(&old_nesting);
break;
case UNTIL:
nesting_push(&old_nesting, c);
t = newtp((c == WHILE) ? TWHILE : TUNTIL);
- t->left = c_list(true);
- t->right = dogroup();
+ t->left = c_list(sALIAS, true);
+ t->right = dogroup(sALIAS);
nesting_pop(&old_nesting);
break;
musthave(LWORD, 0);
t->str = yylval.cp;
nesting_push(&old_nesting, c);
- t->left = caselist();
+ t->left = caselist(sALIAS);
nesting_pop(&old_nesting);
break;
case IF:
nesting_push(&old_nesting, c);
t = newtp(TIF);
- t->left = c_list(true);
- t->right = thenpart();
+ t->left = c_list(sALIAS, true);
+ t->right = thenpart(sALIAS);
musthave(FI, KEYWORD|sALIAS);
nesting_pop(&old_nesting);
break;
case BANG:
syniocf &= ~(KEYWORD|sALIAS);
- t = pipeline(0);
+ t = pipeline(0, sALIAS);
if (t == NULL)
syntaxerr(NULL);
t = block(TBANG, NULL, t);
case TIME:
syniocf &= ~(KEYWORD|sALIAS);
- t = pipeline(0);
+ t = pipeline(0, sALIAS);
if (t && t->type == TCOM) {
t->str = alloc(2, ATEMP);
/* TF_* flags */
case FUNCTION:
musthave(LWORD, 0);
- t = function_body(yylval.cp, true);
+ t = function_body(yylval.cp, sALIAS, true);
break;
}
}
static struct op *
-dogroup(void)
+dogroup(int sALIAS)
{
int c;
struct op *list;
*/
if (c == DO)
c = DONE;
- else if (c == '{')
- c = '}';
+ else if ((unsigned int)c == ORD('{'))
+ c = ORD('}');
else
syntaxerr(NULL);
- list = c_list(true);
+ list = c_list(sALIAS, true);
musthave(c, KEYWORD|sALIAS);
return (list);
}
static struct op *
-thenpart(void)
+thenpart(int sALIAS)
{
struct op *t;
musthave(THEN, KEYWORD|sALIAS);
t = newtp(0);
- t->left = c_list(true);
+ t->left = c_list(sALIAS, true);
if (t->left == NULL)
syntaxerr(NULL);
- t->right = elsepart();
+ t->right = elsepart(sALIAS);
return (t);
}
static struct op *
-elsepart(void)
+elsepart(int sALIAS)
{
struct op *t;
switch (token(KEYWORD|sALIAS|CMDASN)) {
case ELSE:
- if ((t = c_list(true)) == NULL)
+ if ((t = c_list(sALIAS, true)) == NULL)
syntaxerr(NULL);
return (t);
case ELIF:
t = newtp(TELIF);
- t->left = c_list(true);
- t->right = thenpart();
+ t->left = c_list(sALIAS, true);
+ t->right = thenpart(sALIAS);
return (t);
default:
}
static struct op *
-caselist(void)
+caselist(int sALIAS)
{
struct op *t, *tl;
int c;
/* A {...} can be used instead of in...esac for case statements */
if (c == IN)
c = ESAC;
- else if (c == '{')
- c = '}';
+ else if ((unsigned int)c == ORD('{'))
+ c = ORD('}');
else
syntaxerr(NULL);
t = tl = NULL;
/* no ALIAS here */
while ((tpeek(CONTIN|KEYWORD|ESACONLY)) != c) {
- struct op *tc = casepart(c);
+ struct op *tc = casepart(c, sALIAS);
if (tl == NULL)
t = tl = tc, tl->right = NULL;
else
}
static struct op *
-casepart(int endtok)
+casepart(int endtok, int sALIAS)
{
struct op *t;
XPtrV ptns;
XPinit(ptns, 16);
t = newtp(TPAT);
/* no ALIAS here */
- if (token(CONTIN | KEYWORD) != '(')
+ if ((unsigned int)token(CONTIN | KEYWORD) != ORD('('))
REJECT;
do {
switch (token(0)) {
case LWORD:
break;
- case '}':
+ case ORD('}'):
case ESAC:
if (symbol != endtok) {
- strdupx(yylval.cp,
- symbol == '}' ? Tcbrace : Tesac, ATEMP);
+ strdupx(yylval.cp, (unsigned int)symbol ==
+ ORD('}') ? Tcbrace : Tesac, ATEMP);
break;
}
/* FALLTHROUGH */
REJECT;
XPput(ptns, NULL);
t->vars = (char **)XPclose(ptns);
- musthave(')', 0);
+ musthave(ORD(')'), 0);
- t->left = c_list(true);
+ t->left = c_list(sALIAS, true);
/* initialise to default for ;; or omitted */
- t->u.charflag = ';';
+ t->u.charflag = ORD(';');
/* SUSv4 requires the ;; except in the last casepart */
if ((tpeek(CONTIN|KEYWORD|sALIAS)) != endtok)
switch (symbol) {
default:
syntaxerr(NULL);
case BRKEV:
- t->u.charflag = '|';
+ t->u.charflag = ORD('|');
if (0)
/* FALLTHROUGH */
case BRKFT:
- t->u.charflag = '&';
+ t->u.charflag = ORD('&');
/* FALLTHROUGH */
case BREAK:
/* initialised above, but we need to eat the token */
}
static struct op *
-function_body(char *name,
+function_body(char *name, int sALIAS,
/* function foo { ... } vs foo() { .. } */
bool ksh_func)
{
* only allow [a-zA-Z_0-9] but this allows more as old pdkshs
* have allowed more; the following were never allowed:
* NUL TAB NL SP " $ & ' ( ) ; < = > \ ` |
- * C_QUOTE covers all but adds # * ? [ ]
+ * C_QUOTE|C_SPC covers all but adds # * ? [ ]
*/
for (p = sname; *p; p++)
- if (ctype(*p, C_QUOTE))
- yyerror("%s: invalid function name\n", sname);
+ if (ctype(*p, C_QUOTE | C_SPC))
+ yyerror(Tinvname, sname, Tfunction);
/*
* Note that POSIX allows only compound statements after foo(),
* only accepts an open-brace.
*/
if (ksh_func) {
- if (tpeek(CONTIN|KEYWORD|sALIAS) == '(' /*)*/) {
+ if ((unsigned int)tpeek(CONTIN|KEYWORD|sALIAS) == ORD('(' /*)*/)) {
/* function foo () { //}*/
ACCEPT;
- musthave(')', 0);
+ musthave(ORD(/*(*/ ')'), 0);
/* degrade to POSIX function */
ksh_func = false;
}
- musthave('{' /*}*/, CONTIN|KEYWORD|sALIAS);
+ musthave(ORD('{' /*}*/), CONTIN|KEYWORD|sALIAS);
REJECT;
}
t->u.ksh_func = tobool(ksh_func);
t->lineno = source->line;
- if ((t->left = get_command(CONTIN)) == NULL) {
+ if ((t->left = get_command(CONTIN, sALIAS)) == NULL) {
char *tv;
/*
* Probably something like foo() followed by EOF or ';'.
}
static char **
-wordlist(void)
+wordlist(int sALIAS)
{
int c;
XPtrV args;
{ "in", IN, true },
{ Tfunction, FUNCTION, true },
{ Ttime, TIME, true },
- { "{", '{', true },
- { Tcbrace, '}', true },
+ { "{", ORD('{'), true },
+ { Tcbrace, ORD('}'), true },
{ "!", BANG, true },
{ "[[", DBRACKET, true },
/* Lexical tokens (0[EOF], LWORD and REDIR handled specially) */
{ "((", MDPAREN, false },
{ "|&", COPROC, false },
/* and some special cases... */
- { "newline", '\n', false },
+ { "newline", ORD('\n'), false },
{ NULL, 0, false }
};
goto Again;
}
/* don't quote the EOF */
- yyerror("%s: unexpected EOF\n", Tsynerr);
+ yyerror("%s: unexpected EOF", Tsynerr);
/* NOTREACHED */
case LWORD:
s = redir;
}
}
- yyerror("%s: '%s' %s\n", Tsynerr, s, what);
+ yyerror(Tf_sD_s_qs, Tsynerr, what, s);
}
static void
}
struct op *
-compile(Source *s, bool skiputf8bom)
+compile(Source *s, bool skiputf8bom, bool doalias)
{
nesting.start_token = 0;
nesting.start_line = 0;
source = s;
if (skiputf8bom)
yyskiputf8bom();
- yyparse();
+ yyparse(doalias);
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
- * $
- */
-int
-assign_command(const char *s, bool docommand)
-{
- if (!*s)
- return (0);
- return ((strcmp(s, Talias) == 0) ||
- (strcmp(s, Texport) == 0) ||
- (strcmp(s, Treadonly) == 0) ||
- (docommand && (strcmp(s, Tcommand) == 0)) ||
- (strcmp(s, Ttypeset) == 0));
-}
-
/* Check if we are in the middle of reading an alias */
static int
inalias(struct source *s)
ret = (uqword && !strcmp(yylval.cp,
dbtest_tokens[(int)TM_NOT])) ? TO_NONNULL : TO_NONOP;
else if (meta == TM_OPAREN)
- ret = c == '(' /*)*/ ? TO_NONNULL : TO_NONOP;
+ ret = (unsigned int)c == ORD('(') /*)*/ ? TO_NONNULL : TO_NONOP;
else if (meta == TM_CPAREN)
- ret = c == /*(*/ ')' ? TO_NONNULL : TO_NONOP;
+ ret = (unsigned int)c == /*(*/ ORD(')') ? TO_NONNULL : TO_NONOP;
else if (meta == TM_UNOP || meta == TM_BINOP) {
if (meta == TM_BINOP && c == REDIR &&
(yylval.iop->ioflag == IOREAD ||
tv->tv_sec = 0;
/* parse integral part */
- while (ksh_isdigit(*s)) {
+ while (ctype(*s, C_DIGIT)) {
tt.tv_sec = tv->tv_sec * 10 + ksh_numdig(*s++);
/*XXX this overflow check maybe UB */
if (tt.tv_sec / 10 != tv->tv_sec) {
/* parse decimal fraction */
i = 100000;
- while (ksh_isdigit(*s)) {
+ while (ctype(*s, C_DIGIT)) {
tv->tv_usec += i * ksh_numdig(*s++);
if (i == 1)
break;
i /= 10;
}
/* check for junk after fractional part */
- while (ksh_isdigit(*s))
+ while (ctype(*s, C_DIGIT))
++s;
if (*s) {
errno = EINVAL;
* a COMSUB recursively using the main shell parser and lexer
*/
char *
-yyrecursive(int subtype MKSH_A_UNUSED)
+yyrecursive(int subtype)
{
struct op *t;
char *cp;
struct yyrecursive_state *ys;
- int stok, etok;
+ unsigned int stok, etok;
if (subtype != COMSUB) {
- stok = '{';
- etok = '}';
+ stok = ORD('{');
+ etok = ORD('}');
} else {
- stok = '(';
- etok = ')';
+ stok = ORD('(');
+ etok = ORD(')');
}
ys = alloc(sizeof(struct yyrecursive_state), ATEMP);
memcpy(ys->old_heres, heres, sizeof(heres));
ys->old_herep = herep;
herep = heres;
- ys->old_salias = sALIAS;
- sALIAS = 0;
ys->next = e->yyrecursive_statep;
e->yyrecursive_statep = ys;
/* we use TPAREN as a helper container here */
- t = nested(TPAREN, stok, etok);
+ t = nested(TPAREN, stok, etok, ALIAS);
yyrecursive_pop(false);
/* t->left because nested(TPAREN, ...) hides our goodies there */
return;
e->yyrecursive_statep = ys->next;
- sALIAS = ys->old_salias;
memcpy(heres, ys->old_heres, sizeof(heres));
herep = ys->old_herep;
reject = ys->old_reject;
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