var_t interpretexp(char** line)
{
var_t exp;
while (isspace(**line) != 0) ++(*line);
if (**line == '"')
{
++(*line);
exp.any.s = readtoken(line, isqmark, 1);
exp.tag = STRING;
}
else if (isdigit(**line))
{
char* str = readtoken(line, isdigit, 0);
exp.any.i = atoi(str);
exp.tag = INT;
free(str);
}
else if (isalpha(**line))
{
char* id = readtoken(line, isalpha, 0);
exp = *find_var(id);
free(id);
}
else
{
printf("Error at:\n %s ", *line);
exit(EXIT_FAILURE);
}
while (isspace(**line) != 0) ++(*line);
/*if + return add_var(exp, interpretexp(line))
else if - return sub_var(exp, interpretexp(line))*/
return exp;
}
STATIC union node *
pipeline() {
union node *n1, *pipenode;
struct nodelist *lp, *prev;
n1 = command();
if (readtoken() == TPIPE) {
pipenode = (union node *)stalloc(sizeof (struct npipe));
pipenode->type = NPIPE;
pipenode->npipe.backgnd = 0;
lp = (struct nodelist *)stalloc(sizeof (struct nodelist));
pipenode->npipe.cmdlist = lp;
lp->n = n1;
do {
prev = lp;
lp = (struct nodelist *)stalloc(sizeof (struct nodelist));
lp->n = command();
prev->next = lp;
} while (readtoken() == TPIPE);
lp->next = NULL;
n1 = pipenode;
}
tokpushback++;
return n1;
}
STATIC union node *
list(nlflag) {
union node *n1, *n2, *n3;
checkkwd();
if (nlflag == 0 && tokendlist[lasttoken])
return NULL;
n1 = andor();
for (;;) {
switch (readtoken()) {
case TBACKGND:
if (n1->type == NCMD || n1->type == NPIPE) {
n1->ncmd.backgnd = 1;
} else if (n1->type == NREDIR) {
n1->type = NBACKGND;
} else {
n3 = (union node *)stalloc(sizeof (struct nredir));
n3->type = NBACKGND;
n3->nredir.n = n1;
n3->nredir.redirect = NULL;
n1 = n3;
}
goto tsemi;
case TNL:
tokpushback++;
/* fall through */
tsemi: case TSEMI:
if (readtoken() == TNL) {
parseheredoc();
if (nlflag)
return n1;
} else {
tokpushback++;
}
checkkwd();
if (tokendlist[lasttoken])
return n1;
n2 = andor();
n3 = (union node *)stalloc(sizeof (struct nbinary));
n3->type = NSEMI;
n3->nbinary.ch1 = n1;
n3->nbinary.ch2 = n2;
n1 = n3;
break;
case TEOF:
if (heredoclist)
parseheredoc();
else
pungetc(); /* push back EOF on input */
return n1;
default:
if (nlflag)
synexpect(-1);
tokpushback++;
return n1;
}
}
}
STATIC union node *
simplecmd() {
union node *args, **app;
union node *redir, **rpp;
union node *n;
args = NULL;
app = &args;
rpp = &redir;
for (;;) {
if (readtoken() == TWORD) {
n = (union node *)stalloc(sizeof (struct narg));
n->type = NARG;
n->narg.text = wordtext;
n->narg.backquote = backquotelist;
*app = n;
app = &n->narg.next;
} else if (lasttoken == TREDIR) {
*rpp = n = redirnode;
rpp = &n->nfile.next;
parsefname(); /* read name of redirection file */
} else if (lasttoken == TLP && app == &args->narg.next
&& rpp == &redir) {
/* We have a function */
if (readtoken() != TRP)
synexpect(TRP);
if (! goodname(n->narg.text))
synerror("Bad function name");
n->type = NDEFUN;
n->narg.next = command();
return n;
} else {
tokpushback++;
break;
}
}
*app = NULL;
*rpp = NULL;
n = (union node *)stalloc(sizeof (struct ncmd));
n->type = NCMD;
n->ncmd.backgnd = 0;
n->ncmd.args = args;
n->ncmd.redirect = redir;
return n;
}
STATIC int
peektoken(void)
{
int t;
t = readtoken();
tokpushback++;
return (t);
}
size_t
readtokens (FILE *stream,
size_t projected_n_tokens,
const char *delim,
size_t n_delim,
char ***tokens_out,
size_t **token_lengths)
{
token_buffer tb, *token = &tb;
char **tokens;
size_t *lengths;
size_t sz;
size_t n_tokens;
if (projected_n_tokens == 0)
projected_n_tokens = 64;
else
projected_n_tokens++; /* add one for trailing NULL pointer */
sz = projected_n_tokens;
tokens = xnmalloc (sz, sizeof *tokens);
lengths = xnmalloc (sz, sizeof *lengths);
n_tokens = 0;
init_tokenbuffer (token);
for (;;)
{
char *tmp;
size_t token_length = readtoken (stream, delim, n_delim, token);
if (n_tokens >= sz)
{
tokens = x2nrealloc (tokens, &sz, sizeof *tokens);
lengths = xnrealloc (lengths, sz, sizeof *lengths);
}
if (token_length == (size_t) -1)
{
/* don't increment n_tokens for NULL entry */
tokens[n_tokens] = NULL;
lengths[n_tokens] = 0;
break;
}
tmp = xnmalloc (token_length + 1, sizeof *tmp);
lengths[n_tokens] = token_length;
tokens[n_tokens] = memcpy (tmp, token->buffer, token_length + 1);
n_tokens++;
}
free (token->buffer);
*tokens_out = tokens;
if (token_lengths != NULL)
*token_lengths = lengths;
else
free (lengths);
return n_tokens;
}
static int read_comment(struct input *input)
{
char separator[128];
char *line = input_line(input);
line = readtoken(separator, line, " \n");
input_next(input);
while ((line = input_line(input)) && !startswith(line, separator))
input_next(input);
return 0;
}
STATIC union node *
pipeline(void)
{
union node *n1, *n2, *pipenode;
struct nodelist *lp, *prev;
int negate;
negate = 0;
TRACE(("pipeline: entered\n"));
while (readtoken() == TNOT)
negate = !negate;
tokpushback++;
n1 = command();
if (readtoken() == TPIPE) {
pipenode = (union node *)stalloc(sizeof (struct npipe));
pipenode->type = NPIPE;
pipenode->npipe.backgnd = 0;
lp = (struct nodelist *)stalloc(sizeof (struct nodelist));
pipenode->npipe.cmdlist = lp;
lp->n = n1;
do {
prev = lp;
lp = (struct nodelist *)stalloc(sizeof (struct nodelist));
lp->n = command();
prev->next = lp;
} while (readtoken() == TPIPE);
lp->next = NULL;
n1 = pipenode;
}
tokpushback++;
if (negate) {
n2 = (union node *)stalloc(sizeof (struct nnot));
n2->type = NNOT;
n2->nnot.com = n1;
return n2;
} else
return n1;
}
STATIC void
parsefname() {
union node *n = redirnode;
if (readtoken() != TWORD)
synexpect(-1);
if (n->type == NHERE) {
struct heredoc *here = heredoc;
struct heredoc *p;
int i;
if (quoteflag == 0)
n->type = NXHERE;
TRACE(("Here document %d\n", n->type));
if (here->striptabs) {
while (*wordtext == '\t')
wordtext++;
}
if (! noexpand(wordtext) || (i = strlen(wordtext)) == 0 || i > EOFMARKLEN)
synerror("Illegal eof marker for << redirection");
rmescapes(wordtext);
here->eofmark = wordtext;
here->next = NULL;
if (heredoclist == NULL)
heredoclist = here;
else {
for (p = heredoclist ; p->next ; p = p->next);
p->next = here;
}
} else if (n->type == NTOFD || n->type == NFROMFD) {
if (is_digit(wordtext[0]))
n->ndup.dupfd = digit_val(wordtext[0]);
else if (wordtext[0] == '-')
n->ndup.dupfd = -1;
else
goto bad;
if (wordtext[1] != '\0') {
bad:
synerror("Bad fd number");
}
} else {
n->nfile.fname = (union node *)stalloc(sizeof (struct narg));
n = n->nfile.fname;
n->type = NARG;
n->narg.next = NULL;
n->narg.text = wordtext;
n->narg.backquote = backquotelist;
}
}
union node *
parsecmd(interact) {
int t;
doprompt = interact;
if (doprompt)
putprompt(ps1val());
needprompt = 0;
if ((t = readtoken()) == TEOF)
return NEOF;
if (t == TNL)
return NULL;
tokpushback++;
return list(1);
}
static void
basic (void)
{
char const *filename = "in.827";
int fd = open (filename, O_CREAT | O_WRONLY, 0600);
ASSERT (fd >= 0);
ASSERT (write (fd, "a|b;c+d", 7) == 7);
ASSERT (close (fd) == 0);
{
token_buffer tb;
FILE *fp = fopen (filename, "r");
ASSERT (fp);
init_tokenbuffer (&tb);
ASSERT (readtoken (fp, "|;", 2, &tb) == 1 && tb.buffer[0] == 'a');
ASSERT (readtoken (fp, "|;", 2, &tb) == 1 && tb.buffer[0] == 'b');
ASSERT (readtoken (fp, "+", 1, &tb) == 1 && tb.buffer[0] == 'c');
ASSERT (readtoken (fp, "-", 1, &tb) == 1 && tb.buffer[0] == 'd');
ASSERT (readtoken (fp, "%", 0, &tb) == (size_t) -1);
ASSERT ( ! ferror (fp));
ASSERT (fclose (fp) == 0);
}
}
STATIC void
checkkwd() {
register char *const *pp;
int t;
while ((t = readtoken()) == TNL)
parseheredoc();
if (t == TWORD && quoteflag == 0) {
for (pp = parsekwd ; *pp ; pp++) {
if (**pp == *wordtext && equal(*pp, wordtext)) {
lasttoken = pp - parsekwd + KWDOFFSET;
break;
}
}
}
tokpushback++;
}
void interpretline(char* line)
{
char* name;
do
{
name = readtoken(&line, isalpha, 0);
printf(">%s<\n", name);
switch (*line)
{
case '(': interpretfunc(name, ++line); break;
case '=': interpretvar(name, ++line); break;
default: printf("compile error at: %s\n", line);
abort();
}
/*free(name);*/
} while (*line != '\0');
}
int
main (int argc, char **argv)
{
token_buffer tb;
char const *delim;
size_t delim_len;
atexit (close_stdout);
if (argc == 1)
{
basic ();
return 0;
}
init_tokenbuffer (&tb);
if (argc != 2)
return 99;
delim = argv[1];
delim_len = strlen (delim);
if (STREQ (delim, "\\0"))
{
delim = "";
delim_len = 1;
}
while (1)
{
size_t token_length = readtoken (stdin, delim, delim_len, &tb);
if (token_length == (size_t) -1)
break;
fwrite (tb.buffer, 1, token_length, stdout);
putchar (':');
}
putchar ('\n');
free (tb.buffer);
ASSERT ( ! ferror (stdin));
return 0;
}
union node *
parsecmd(int interact)
{
int t;
extern int exitstatus;
tokpushback = 0;
doprompt = interact;
if (doprompt)
setprompt(exitstatus == 0 || (vpse.flags & VUNSET)
? 1 : -1);
else
setprompt(0);
needprompt = 0;
t = readtoken();
if (t == TEOF)
return NEOF;
if (t == TNL)
return NULL;
tokpushback++;
return list(1);
}
static int exec_ironout(struct input *input, char *ironout)
{
char token[128];
char command[MAXPATHLEN];
FILE *output;
char *line = input_line(input);
int result;
char *cur = command;
line = nthtoken(token, line, " \n", 2);
strcpy(cur, ironout);
cur += strlen(cur);
while (*line) {
line = readtoken(token, line, " \n");
cur += sprintf(cur, " %s", token);
}
if (!(output = popen(command, "r")))
return 1;
result = match_files(input, output);
if (pclose(output))
return 1;
return result;
}
STATIC union node *
andor() {
union node *n1, *n2, *n3;
int t;
n1 = pipeline();
for (;;) {
if ((t = readtoken()) == TAND) {
t = NAND;
} else if (t == TOR) {
t = NOR;
} else {
tokpushback++;
return n1;
}
n2 = pipeline();
n3 = (union node *)stalloc(sizeof (struct nbinary));
n3->type = t;
n3->nbinary.ch1 = n1;
n3->nbinary.ch2 = n2;
n1 = n3;
}
}
STATIC void
parsefname(void)
{
union node *n = redirnode;
if (readtoken() != TWORD)
synexpect(-1);
if (n->type == NHERE) {
struct heredoc *here = heredoc;
struct heredoc *p;
int i;
if (quoteflag == 0)
n->type = NXHERE;
TRACE(("Here document %d\n", n->type));
if (here->striptabs) {
while (*wordtext == '\t')
wordtext++;
}
if (! noexpand(wordtext) || (i = strlen(wordtext)) == 0 || i > EOFMARKLEN)
synerror("Illegal eof marker for << redirection");
rmescapes(wordtext);
here->eofmark = wordtext;
here->next = NULL;
if (heredoclist == NULL)
heredoclist = here;
else {
for (p = heredoclist ; p->next ; p = p->next);
p->next = here;
}
} else if (n->type == NTOFD || n->type == NFROMFD) {
fixredir(n, wordtext, 0);
} else {
n->nfile.fname = makename();
}
}
void readancestry(char *ancestryname)
/* These occur at the following braceindent levels:
* 1: trio, genotyped, owned, split, active, segments. Ignored.
* 2: north_european, eana, and other ethnic categories. They occur in no particular order and must be sorted later.
* 3: hap1 and hap2, which designate which chromosome of a pair.
* 4. chr1 through chr22 and chrX-npar. chrY and mt do not occur.
*/
{
token tok;
int braceindent=0,bracketindent=0,i;
string ethnicity;
interval intvl;
int hap,chr,startend=0;
int64_t index;
ancestryfile=fopen(ancestryname,"r");
if (ancestryfile)
{
while (tok.ch!=EOF)
{
tok=readtoken();
switch (tok.ch)
{
case '{':
braceindent++;
break;
case '}':
braceindent--;
break;
case '[':
bracketindent++;
startend=0;
break;
case ']':
bracketindent--;
if (startend)
{
intvl.ethnicity[0]=find_ethnic(ethnicity);
intvl.chromosome=chr;
index=intvl.index();
if (haploid[hap][index].ethnicity[0]<=intvl.ethnicity[0])
haploid[hap][index]=intvl;
//printf("%d %016lx [%d,%d] %s\n",hap,index,intvl.start,intvl.end,ethnicity.c_str());
intvl.clear();
startend=0;
}
break;
case ',':
startend++;
break;
case '"':
switch (braceindent)
{
case 2:
ethnicity=tok.str;
break;
case 3:
hap=tok.str[3]-'1';
break;
case 4:
chr=chromosomenumber(tok.str);
break;
}
/*for (i=0;i<braceindent;i++)
printf("{ ");
for (i=0;i<bracketindent;i++)
printf("[ ");
printf("%s\n",tok.str.c_str());*/
break;
case '0':
if (startend)
intvl.end=tok.n;
else
intvl.start=tok.n;
/*for (i=0;i<braceindent;i++)
printf("{ ");
for (i=0;i<bracketindent;i++)
printf("[ ");
printf("%d\n",tok.n);*/
break;
}
}
fclose(ancestryfile);
}
else
fprintf(stderr,"%s: could not open file\n",ancestryname);
}
STATIC int
readtoken1(int firstc, char const *syntax, char *eofmark, int striptabs)
{
int c = firstc;
char *out;
int len;
char line[EOFMARKLEN + 1];
struct nodelist *bqlist;
int quotef;
int dblquote;
int varnest; /* levels of variables expansion */
int arinest; /* levels of arithmetic expansion */
int parenlevel; /* levels of parens in arithmetic */
int oldstyle;
char const *prevsyntax; /* syntax before arithmetic */
int synentry;
#if __GNUC__
/* Avoid longjmp clobbering */
(void) &out;
(void) "ef;
(void) &dblquote;
(void) &varnest;
(void) &arinest;
(void) &parenlevel;
(void) &oldstyle;
(void) &prevsyntax;
(void) &syntax;
(void) &synentry;
#endif
startlinno = plinno;
dblquote = 0;
if (syntax == DQSYNTAX)
dblquote = 1;
quotef = 0;
bqlist = NULL;
varnest = 0;
arinest = 0;
parenlevel = 0;
STARTSTACKSTR(out);
loop: { /* for each line, until end of word */
CHECKEND(); /* set c to PEOF if at end of here document */
for (;;) { /* until end of line or end of word */
CHECKSTRSPACE(3, out); /* permit 3 calls to USTPUTC */
synentry = syntax[c];
switch(synentry) {
case CNL: /* '\n' */
if (syntax == BASESYNTAX)
goto endword; /* exit outer loop */
USTPUTC(c, out);
plinno++;
if (doprompt)
setprompt(2);
else
setprompt(0);
c = pgetc();
goto loop; /* continue outer loop */
case CWORD:
USTPUTC(c, out);
break;
case CCTL:
if (eofmark == NULL || dblquote)
USTPUTC(CTLESC, out);
USTPUTC(c, out);
break;
case CBACK: /* backslash */
c = pgetc();
if (c == PEOF) {
USTPUTC('\\', out);
pungetc();
} else if (c == '\n') {
if (doprompt)
setprompt(2);
else
setprompt(0);
} else {
if (dblquote && c != '\\' &&
c != '`' && c != '$' &&
(c != '"' || eofmark != NULL))
USTPUTC('\\', out);
if (SQSYNTAX[c] == CCTL)
USTPUTC(CTLESC, out);
else if (eofmark == NULL)
USTPUTC(CTLQUOTEMARK, out);
USTPUTC(c, out);
quotef++;
}
break;
case CSQUOTE:
if (eofmark == NULL)
USTPUTC(CTLQUOTEMARK, out);
syntax = SQSYNTAX;
break;
case CDQUOTE:
if (eofmark == NULL)
USTPUTC(CTLQUOTEMARK, out);
syntax = DQSYNTAX;
dblquote = 1;
break;
case CENDQUOTE:
if (eofmark != NULL && arinest == 0 &&
varnest == 0) {
USTPUTC(c, out);
} else {
if (arinest) {
syntax = ARISYNTAX;
dblquote = 0;
} else if (eofmark == NULL) {
syntax = BASESYNTAX;
dblquote = 0;
}
quotef++;
}
break;
case CVAR: /* '$' */
PARSESUB(); /* parse substitution */
break;
case CENDVAR: /* '}' */
if (varnest > 0) {
varnest--;
USTPUTC(CTLENDVAR, out);
} else {
USTPUTC(c, out);
}
break;
case CLP: /* '(' in arithmetic */
parenlevel++;
USTPUTC(c, out);
break;
case CRP: /* ')' in arithmetic */
if (parenlevel > 0) {
USTPUTC(c, out);
--parenlevel;
} else {
if (pgetc() == ')') {
if (--arinest == 0) {
USTPUTC(CTLENDARI, out);
syntax = prevsyntax;
if (syntax == DQSYNTAX)
dblquote = 1;
else
dblquote = 0;
} else
USTPUTC(')', out);
} else {
/*
* unbalanced parens
* (don't 2nd guess - no error)
*/
pungetc();
USTPUTC(')', out);
}
}
break;
case CBQUOTE: /* '`' */
PARSEBACKQOLD();
break;
case CEOF:
goto endword; /* exit outer loop */
default:
if (varnest == 0)
goto endword; /* exit outer loop */
USTPUTC(c, out);
}
c = pgetc_macro();
}
}
endword:
if (syntax == ARISYNTAX)
synerror("Missing '))'");
if (syntax != BASESYNTAX && ! parsebackquote && eofmark == NULL)
synerror("Unterminated quoted string");
if (varnest != 0) {
startlinno = plinno;
synerror("Missing '}'");
}
USTPUTC('\0', out);
len = out - stackblock();
out = stackblock();
if (eofmark == NULL) {
if ((c == '>' || c == '<')
&& quotef == 0
&& len <= 2
&& (*out == '\0' || is_digit(*out))) {
PARSEREDIR();
return lasttoken = TREDIR;
} else {
pungetc();
}
}
quoteflag = quotef;
backquotelist = bqlist;
grabstackblock(len);
wordtext = out;
return lasttoken = TWORD;
/* end of readtoken routine */
/*
* Check to see whether we are at the end of the here document. When this
* is called, c is set to the first character of the next input line. If
* we are at the end of the here document, this routine sets the c to PEOF.
*/
checkend: {
if (eofmark) {
if (striptabs) {
while (c == '\t')
c = pgetc();
}
if (c == *eofmark) {
if (pfgets(line, sizeof line) != NULL) {
char *p, *q;
p = line;
for (q = eofmark + 1 ; *q && *p == *q ; p++, q++);
if (*p == '\n' && *q == '\0') {
c = PEOF;
plinno++;
needprompt = doprompt;
} else {
pushstring(line, strlen(line), NULL);
}
}
}
}
goto checkend_return;
}
/*
* Parse a redirection operator. The variable "out" points to a string
* specifying the fd to be redirected. The variable "c" contains the
* first character of the redirection operator.
*/
parseredir: {
char fd = *out;
union node *np;
np = (union node *)stalloc(sizeof (struct nfile));
if (c == '>') {
np->nfile.fd = 1;
c = pgetc();
if (c == '>')
np->type = NAPPEND;
else if (c == '&')
np->type = NTOFD;
else if (c == '|')
np->type = NCLOBBER;
else {
np->type = NTO;
pungetc();
}
} else { /* c == '<' */
np->nfile.fd = 0;
c = pgetc();
if (c == '<') {
if (sizeof (struct nfile) != sizeof (struct nhere)) {
np = (union node *)stalloc(sizeof (struct nhere));
np->nfile.fd = 0;
}
np->type = NHERE;
heredoc = (struct heredoc *)stalloc(sizeof (struct heredoc));
heredoc->here = np;
if ((c = pgetc()) == '-') {
heredoc->striptabs = 1;
} else {
heredoc->striptabs = 0;
pungetc();
}
} else if (c == '&')
np->type = NFROMFD;
else if (c == '>')
np->type = NFROMTO;
else {
np->type = NFROM;
pungetc();
}
}
if (fd != '\0')
np->nfile.fd = digit_val(fd);
redirnode = np;
goto parseredir_return;
}
/*
* Parse a substitution. At this point, we have read the dollar sign
* and nothing else.
*/
parsesub: {
int subtype;
int typeloc;
int flags;
char *p;
#ifndef GDB_HACK
static const char types[] = "}-+?=";
#endif
int bracketed_name = 0; /* used to handle ${[0-9]*} variables */
c = pgetc();
if (c != '(' && c != '{' && !is_name(c) && !is_special(c)) {
USTPUTC('$', out);
pungetc();
} else if (c == '(') { /* $(command) or $((arith)) */
if (pgetc() == '(') {
PARSEARITH();
} else {
pungetc();
PARSEBACKQNEW();
}
} else {
USTPUTC(CTLVAR, out);
typeloc = out - stackblock();
USTPUTC(VSNORMAL, out);
subtype = VSNORMAL;
if (c == '{') {
bracketed_name = 1;
c = pgetc();
if (c == '#') {
if ((c = pgetc()) == '}')
c = '#';
else
subtype = VSLENGTH;
}
else
subtype = 0;
}
if (is_name(c)) {
do {
STPUTC(c, out);
c = pgetc();
} while (is_in_name(c));
} else if (is_digit(c)) {
if (bracketed_name) {
do {
STPUTC(c, out);
c = pgetc();
} while (is_digit(c));
} else {
STPUTC(c, out);
c = pgetc();
}
} else {
if (! is_special(c))
badsub: synerror("Bad substitution");
USTPUTC(c, out);
c = pgetc();
}
STPUTC('=', out);
flags = 0;
if (subtype == 0) {
switch (c) {
case ':':
flags = VSNUL;
c = pgetc();
/*FALLTHROUGH*/
default:
p = strchr(types, c);
if (p == NULL)
goto badsub;
subtype = p - types + VSNORMAL;
break;
case '%':
case '#':
{
int cc = c;
subtype = c == '#' ? VSTRIMLEFT :
VSTRIMRIGHT;
c = pgetc();
if (c == cc)
subtype++;
else
pungetc();
break;
}
}
} else {
pungetc();
}
if (subtype != VSLENGTH && (dblquote || arinest))
flags |= VSQUOTE;
*(stackblock() + typeloc) = subtype | flags;
if (subtype != VSNORMAL)
varnest++;
}
goto parsesub_return;
}
/*
* Called to parse command substitutions. Newstyle is set if the command
* is enclosed inside $(...); nlpp is a pointer to the head of the linked
* list of commands (passed by reference), and savelen is the number of
* characters on the top of the stack which must be preserved.
*/
parsebackq: {
struct nodelist **nlpp;
int savepbq;
union node *n;
char *volatile str;
struct jmploc jmploc;
struct jmploc *volatile savehandler;
int savelen;
int saveprompt;
#if __GNUC__
/* Avoid longjmp clobbering */
(void) &saveprompt;
#endif
savepbq = parsebackquote;
if (setjmp(jmploc.loc)) {
if (str)
ckfree(str);
parsebackquote = 0;
handler = savehandler;
longjmp(handler->loc, 1);
}
INTOFF;
str = NULL;
savelen = out - stackblock();
if (savelen > 0) {
str = ckmalloc(savelen);
memcpy(str, stackblock(), savelen);
}
savehandler = handler;
handler = &jmploc;
INTON;
if (oldstyle) {
/* We must read until the closing backquote, giving special
treatment to some slashes, and then push the string and
reread it as input, interpreting it normally. */
char *out;
int c;
int savelen;
char *str;
STARTSTACKSTR(out);
for (;;) {
if (needprompt) {
setprompt(2);
needprompt = 0;
}
switch (c = pgetc()) {
case '`':
goto done;
case '\\':
if ((c = pgetc()) == '\n') {
plinno++;
if (doprompt)
setprompt(2);
else
setprompt(0);
/*
* If eating a newline, avoid putting
* the newline into the new character
* stream (via the STPUTC after the
* switch).
*/
continue;
}
if (c != '\\' && c != '`' && c != '$'
&& (!dblquote || c != '"'))
STPUTC('\\', out);
break;
case '\n':
plinno++;
needprompt = doprompt;
break;
case PEOF:
startlinno = plinno;
synerror("EOF in backquote substitution");
break;
default:
break;
}
STPUTC(c, out);
}
done:
STPUTC('\0', out);
savelen = out - stackblock();
if (savelen > 0) {
str = ckmalloc(savelen);
memcpy(str, stackblock(), savelen);
setinputstring(str, 1);
}
}
nlpp = &bqlist;
while (*nlpp)
nlpp = &(*nlpp)->next;
*nlpp = (struct nodelist *)stalloc(sizeof (struct nodelist));
(*nlpp)->next = NULL;
parsebackquote = oldstyle;
if (oldstyle) {
saveprompt = doprompt;
doprompt = 0;
}
n = list(0);
if (oldstyle)
doprompt = saveprompt;
else {
if (readtoken() != TRP)
synexpect(TRP);
}
(*nlpp)->n = n;
if (oldstyle) {
/*
* Start reading from old file again, ignoring any pushed back
* tokens left from the backquote parsing
*/
popfile();
tokpushback = 0;
}
while (stackblocksize() <= savelen)
growstackblock();
STARTSTACKSTR(out);
if (str) {
memcpy(out, str, savelen);
STADJUST(savelen, out);
INTOFF;
ckfree(str);
str = NULL;
INTON;
}
parsebackquote = savepbq;
handler = savehandler;
if (arinest || dblquote)
USTPUTC(CTLBACKQ | CTLQUOTE, out);
else
USTPUTC(CTLBACKQ, out);
if (oldstyle)
goto parsebackq_oldreturn;
else
goto parsebackq_newreturn;
}
/*
* Parse an arithmetic expansion (indicate start of one and set state)
*/
parsearith: {
if (++arinest == 1) {
prevsyntax = syntax;
syntax = ARISYNTAX;
USTPUTC(CTLARI, out);
if (dblquote)
USTPUTC('"',out);
else
USTPUTC(' ',out);
} else {
/*
* we collapse embedded arithmetic expansion to
* parenthesis, which should be equivalent
*/
USTPUTC('(', out);
}
goto parsearith_return;
}
} /* end of readtoken */
STATIC union node *
simplecmd(union node **rpp, union node *redir)
{
union node *args, **app;
union node **orig_rpp = rpp;
union node *n = NULL, *n2;
int negate = 0;
/* If we don't have any redirections already, then we must reset */
/* rpp to be the address of the local redir variable. */
if (redir == 0)
rpp = &redir;
args = NULL;
app = &args;
/*
* We save the incoming value, because we need this for shell
* functions. There can not be a redirect or an argument between
* the function name and the open parenthesis.
*/
orig_rpp = rpp;
while (readtoken() == TNOT) {
TRACE(("command: TNOT recognized\n"));
negate = !negate;
}
tokpushback++;
for (;;) {
if (readtoken() == TWORD) {
n = (union node *)stalloc(sizeof (struct narg));
n->type = NARG;
n->narg.text = wordtext;
n->narg.backquote = backquotelist;
*app = n;
app = &n->narg.next;
} else if (lasttoken == TREDIR) {
*rpp = n = redirnode;
rpp = &n->nfile.next;
parsefname(); /* read name of redirection file */
} else if (lasttoken == TLP && app == &args->narg.next
&& rpp == orig_rpp) {
/* We have a function */
if (readtoken() != TRP)
synexpect(TRP);
#ifdef notdef
if (! goodname(n->narg.text))
synerror("Bad function name");
#endif
n->type = NDEFUN;
n->narg.next = command();
goto checkneg;
} else {
tokpushback++;
break;
}
}
*app = NULL;
*rpp = NULL;
n = (union node *)stalloc(sizeof (struct ncmd));
n->type = NCMD;
n->ncmd.backgnd = 0;
n->ncmd.args = args;
n->ncmd.redirect = redir;
checkneg:
if (negate) {
n2 = (union node *)stalloc(sizeof (struct nnot));
n2->type = NNOT;
n2->nnot.com = n;
return n2;
}
else
return n;
}
STATIC union node *
command(void)
{
union node *n1, *n2;
union node *ap, **app;
union node *cp, **cpp;
union node *redir, **rpp;
int t, negate = 0;
checkkwd = 2;
redir = NULL;
n1 = NULL;
rpp = &redir;
/* Check for redirection which may precede command */
while (readtoken() == TREDIR) {
*rpp = n2 = redirnode;
rpp = &n2->nfile.next;
parsefname();
}
tokpushback++;
while (readtoken() == TNOT) {
TRACE(("command: TNOT recognized\n"));
negate = !negate;
}
tokpushback++;
switch (readtoken()) {
case TIF:
n1 = (union node *)stalloc(sizeof (struct nif));
n1->type = NIF;
if ((n1->nif.test = list(0)) == NULL)
synexpect(-1);
if (readtoken() != TTHEN)
synexpect(TTHEN);
n1->nif.ifpart = list(0);
n2 = n1;
while (readtoken() == TELIF) {
n2->nif.elsepart = (union node *)stalloc(sizeof (struct nif));
n2 = n2->nif.elsepart;
n2->type = NIF;
if ((n2->nif.test = list(0)) == NULL)
synexpect(-1);
if (readtoken() != TTHEN)
synexpect(TTHEN);
n2->nif.ifpart = list(0);
}
if (lasttoken == TELSE)
n2->nif.elsepart = list(0);
else {
n2->nif.elsepart = NULL;
tokpushback++;
}
if (readtoken() != TFI)
synexpect(TFI);
checkkwd = 1;
break;
case TWHILE:
case TUNTIL: {
int got;
n1 = (union node *)stalloc(sizeof (struct nbinary));
n1->type = (lasttoken == TWHILE)? NWHILE : NUNTIL;
if ((n1->nbinary.ch1 = list(0)) == NULL)
synexpect(-1);
if ((got=readtoken()) != TDO) {
TRACE(("expecting DO got %s %s\n", tokname[got], got == TWORD ? wordtext : ""));
synexpect(TDO);
}
n1->nbinary.ch2 = list(0);
if (readtoken() != TDONE)
synexpect(TDONE);
checkkwd = 1;
break;
}
case TFOR:
if (readtoken() != TWORD || quoteflag || ! goodname(wordtext))
synerror("Bad for loop variable");
n1 = (union node *)stalloc(sizeof (struct nfor));
n1->type = NFOR;
n1->nfor.var = wordtext;
if (readtoken() == TWORD && ! quoteflag && equal(wordtext, "in")) {
app = ≈
while (readtoken() == TWORD) {
n2 = (union node *)stalloc(sizeof (struct narg));
n2->type = NARG;
n2->narg.text = wordtext;
n2->narg.backquote = backquotelist;
*app = n2;
app = &n2->narg.next;
}
*app = NULL;
n1->nfor.args = ap;
if (lasttoken != TNL && lasttoken != TSEMI)
synexpect(-1);
} else {
#ifndef GDB_HACK
static const char argvars[5] = {CTLVAR, VSNORMAL|VSQUOTE,
'@', '=', '\0'};
#endif
n2 = (union node *)stalloc(sizeof (struct narg));
n2->type = NARG;
n2->narg.text = (char *)argvars;
n2->narg.backquote = NULL;
n2->narg.next = NULL;
n1->nfor.args = n2;
/*
* Newline or semicolon here is optional (but note
* that the original Bourne shell only allowed NL).
*/
if (lasttoken != TNL && lasttoken != TSEMI)
tokpushback++;
}
checkkwd = 2;
if ((t = readtoken()) == TDO)
t = TDONE;
else if (t == TBEGIN)
t = TEND;
else
synexpect(-1);
n1->nfor.body = list(0);
if (readtoken() != t)
synexpect(t);
checkkwd = 1;
break;
case TCASE:
n1 = (union node *)stalloc(sizeof (struct ncase));
n1->type = NCASE;
if (readtoken() != TWORD)
synexpect(TWORD);
n1->ncase.expr = n2 = (union node *)stalloc(sizeof (struct narg));
n2->type = NARG;
n2->narg.text = wordtext;
n2->narg.backquote = backquotelist;
n2->narg.next = NULL;
while (readtoken() == TNL);
if (lasttoken != TWORD || ! equal(wordtext, "in"))
synerror("expecting \"in\"");
cpp = &n1->ncase.cases;
noaliases = 1; /* turn off alias expansion */
checkkwd = 2, readtoken();
while (lasttoken != TESAC) {
*cpp = cp = (union node *)stalloc(sizeof (struct nclist));
cp->type = NCLIST;
app = &cp->nclist.pattern;
if (lasttoken == TLP)
readtoken();
for (;;) {
*app = ap = (union node *)stalloc(sizeof (struct narg));
ap->type = NARG;
ap->narg.text = wordtext;
ap->narg.backquote = backquotelist;
if (checkkwd = 2, readtoken() != TPIPE)
break;
app = &ap->narg.next;
readtoken();
}
ap->narg.next = NULL;
if (lasttoken != TRP)
noaliases = 0, synexpect(TRP);
cp->nclist.body = list(0);
checkkwd = 2;
if ((t = readtoken()) != TESAC) {
if (t != TENDCASE)
noaliases = 0, synexpect(TENDCASE);
else
checkkwd = 2, readtoken();
}
cpp = &cp->nclist.next;
}
noaliases = 0; /* reset alias expansion */
*cpp = NULL;
checkkwd = 1;
break;
case TLP:
n1 = (union node *)stalloc(sizeof (struct nredir));
n1->type = NSUBSHELL;
n1->nredir.n = list(0);
n1->nredir.redirect = NULL;
if (readtoken() != TRP)
synexpect(TRP);
checkkwd = 1;
break;
case TBEGIN:
n1 = list(0);
if (readtoken() != TEND)
synexpect(TEND);
checkkwd = 1;
break;
/* Handle an empty command like other simple commands. */
case TSEMI:
case TAND:
case TOR:
/*
* An empty command before a ; doesn't make much sense, and
* should certainly be disallowed in the case of `if ;'.
*/
if (!redir)
synexpect(-1);
case TNL:
case TEOF:
case TWORD:
case TRP:
tokpushback++;
n1 = simplecmd(rpp, redir);
goto checkneg;
default:
synexpect(-1);
}
/* Now check for redirection which may follow command */
while (readtoken() == TREDIR) {
*rpp = n2 = redirnode;
rpp = &n2->nfile.next;
parsefname();
}
tokpushback++;
*rpp = NULL;
if (redir) {
if (n1->type != NSUBSHELL) {
n2 = (union node *)stalloc(sizeof (struct nredir));
n2->type = NREDIR;
n2->nredir.n = n1;
n1 = n2;
}
n1->nredir.redirect = redir;
}
checkneg:
if (negate) {
n2 = (union node *)stalloc(sizeof (struct nnot));
n2->type = NNOT;
n2->nnot.com = n1;
return n2;
}
else
return n1;
}
STATIC union node *
list(int nlflag)
{
union node *n1, *n2, *n3;
int tok;
checkkwd = 2;
if (nlflag == 0 && tokendlist[peektoken()])
return NULL;
n1 = NULL;
for (;;) {
n2 = andor();
tok = readtoken();
if (tok == TBACKGND) {
if (n2->type == NCMD || n2->type == NPIPE) {
n2->ncmd.backgnd = 1;
} else if (n2->type == NREDIR) {
n2->type = NBACKGND;
} else {
n3 = (union node *)stalloc(sizeof (struct nredir));
n3->type = NBACKGND;
n3->nredir.n = n2;
n3->nredir.redirect = NULL;
n2 = n3;
}
}
if (n1 == NULL) {
n1 = n2;
}
else {
n3 = (union node *)stalloc(sizeof (struct nbinary));
n3->type = NSEMI;
n3->nbinary.ch1 = n1;
n3->nbinary.ch2 = n2;
n1 = n3;
}
switch (tok) {
case TBACKGND:
case TSEMI:
tok = readtoken();
/* FALLTHROUGH */
case TNL:
if (tok == TNL) {
parseheredoc();
if (nlflag)
return n1;
} else {
tokpushback++;
}
checkkwd = 2;
if (tokendlist[peektoken()])
return n1;
break;
case TEOF:
if (heredoclist)
parseheredoc();
else
pungetc(); /* push back EOF on input */
return n1;
default:
if (nlflag)
synexpect(-1);
tokpushback++;
return n1;
}
}
}
char *
_iodbcdm_getkeyvalinstr (
char *cnstr,
int cnlen,
char *keywd,
char *value,
int size)
{
char token[1024] = {'\0'};
int flag = 0;
if (cnstr == NULL || value == NULL
|| keywd == NULL || size < 1)
{
return NULL;
}
if (cnlen == SQL_NTS)
{
cnlen = STRLEN (cnstr);
}
if (cnlen <= 0)
{
return NULL;
}
for (;;)
{
cnstr = readtoken (cnstr, token);
if (*token == '\0')
{
break;
}
if (STREQ (token, ";"))
{
flag = 0;
continue;
}
switch (flag)
{
case 0:
if (upper_strneq (token, keywd, strlen (keywd)))
{
flag = 1;
}
break;
case 1:
if (STREQ (token, "="))
{
flag = 2;
}
break;
case 2:
if (size < strlen (token) + 1)
{
return NULL;
}
STRNCPY (value, token, size);
return value;
default:
break;
}
}
return NULL;
}
/*
* read odbc init file to resolve the value of specified
* key from named or defaulted dsn section
*/
char *
_iodbcdm_getkeyvalbydsn (
char *dsn,
int dsnlen,
char *keywd,
char *value,
int size)
{
char buf[1024];
char dsntk[SQL_MAX_DSN_LENGTH + 3] = {'[', '\0'};
char token[1024]; /* large enough */
FILE *file;
char pathbuf[1024];
char *path;
#define DSN_NOMATCH 0
#define DSN_NAMED 1
#define DSN_DEFAULT 2
int dsnid = DSN_NOMATCH;
int defaultdsn = DSN_NOMATCH;
if (dsn == NULL || *dsn == 0)
{
dsn = "default";
dsnlen = STRLEN (dsn);
}
if (dsnlen == SQL_NTS)
{
dsnlen = STRLEN (dsn);
}
if (dsnlen <= 0 || keywd == NULL || buf == 0 || size <= 0)
{
return NULL;
}
if (dsnlen > sizeof (dsntk) - 2)
{
return NULL;
}
value[0] = '\0';
STRNCAT (dsntk, dsn, dsnlen);
STRCAT (dsntk, "]");
dsnlen = dsnlen + 2;
path = _iodbcdm_getinifile (pathbuf, sizeof (pathbuf));
if (path == NULL)
{
return NULL;
}
file = (FILE *) fopen (path, "r");
if (file == NULL)
{
return NULL;
}
for (;;)
{
char *str;
str = fgets (buf, sizeof (buf), file);
if (str == NULL)
{
break;
}
if (*str == '[')
{
if (upper_strneq (str, "[default]", STRLEN ("[default]")))
{
/* we only read first dsn default dsn
* section (as well as named dsn).
*/
if (defaultdsn == DSN_NOMATCH)
{
dsnid = DSN_DEFAULT;
defaultdsn = DSN_DEFAULT;
}
else
{
dsnid = DSN_NOMATCH;
}
continue;
}
else if (upper_strneq (str, dsntk, dsnlen))
{
dsnid = DSN_NAMED;
}
else
{
dsnid = DSN_NOMATCH;
}
continue;
}
else if (dsnid == DSN_NOMATCH)
{
continue;
}
str = readtoken (str, token);
if (upper_strneq (keywd, token, STRLEN (keywd)))
{
str = readtoken (str, token);
if (!STREQ (token, "="))
/* something other than = */
{
continue;
}
str = readtoken (str, token);
if (STRLEN (token) > size - 1)
{
break;
}
STRNCPY (value, token, size);
/* copy the value(i.e. next token) to buf */
if (dsnid != DSN_DEFAULT)
{
break;
}
}
}
fclose (file);
return (*value) ? value : NULL;
}
struct imaptoken *nexttoken(void)
{
return (readtoken(1));
}
struct imaptoken *nexttoken_nouc(void)
{
return (readtoken(0));
}
STATIC union node *
command() {
union node *n1, *n2;
union node *ap, **app;
union node *cp, **cpp;
union node *redir, **rpp;
int t;
checkkwd();
switch (readtoken()) {
case TIF:
n1 = (union node *)stalloc(sizeof (struct nif));
n1->type = NIF;
n1->nif.test = list(0);
if (readtoken() != TTHEN)
synexpect(TTHEN);
n1->nif.ifpart = list(0);
n2 = n1;
while (readtoken() == TELIF) {
n2->nif.elsepart = (union node *)stalloc(sizeof (struct nif));
n2 = n2->nif.elsepart;
n2->type = NIF;
n2->nif.test = list(0);
if (readtoken() != TTHEN)
synexpect(TTHEN);
n2->nif.ifpart = list(0);
}
if (lasttoken == TELSE)
n2->nif.elsepart = list(0);
else {
n2->nif.elsepart = NULL;
tokpushback++;
}
if (readtoken() != TFI)
synexpect(TFI);
break;
case TWHILE:
case TUNTIL:
n1 = (union node *)stalloc(sizeof (struct nbinary));
n1->type = (lasttoken == TWHILE)? NWHILE : NUNTIL;
n1->nbinary.ch1 = list(0);
if (readtoken() != TDO)
synexpect(TDO);
n1->nbinary.ch2 = list(0);
if (readtoken() != TDONE)
synexpect(TDONE);
break;
case TFOR:
if (readtoken() != TWORD || quoteflag || ! goodname(wordtext))
synerror("Bad for loop variable");
n1 = (union node *)stalloc(sizeof (struct nfor));
n1->type = NFOR;
n1->nfor.var = wordtext;
if (readtoken() == TWORD && ! quoteflag && equal(wordtext, "in")) {
app = ≈
while (readtoken() == TWORD) {
n2 = (union node *)stalloc(sizeof (struct narg));
n2->type = NARG;
n2->narg.text = wordtext;
n2->narg.backquote = backquotelist;
*app = n2;
app = &n2->narg.next;
}
*app = NULL;
n1->nfor.args = ap;
} else {
#ifndef GDB_HACK
static const char argvars[5] = {CTLVAR, VSNORMAL|VSQUOTE,
'@', '=', '\0'};
#endif
n2 = (union node *)stalloc(sizeof (struct narg));
n2->type = NARG;
n2->narg.text = (char *)argvars;
n2->narg.backquote = NULL;
n2->narg.next = NULL;
n1->nfor.args = n2;
}
if (lasttoken != TNL && lasttoken != TSEMI)
synexpect(-1);
checkkwd();
if ((t = readtoken()) == TDO)
t = TDONE;
else if (t == TBEGIN)
t = TEND;
else
synexpect(-1);
n1->nfor.body = list(0);
if (readtoken() != t)
synexpect(t);
break;
case TCASE:
n1 = (union node *)stalloc(sizeof (struct ncase));
n1->type = NCASE;
if (readtoken() != TWORD)
synexpect(TWORD);
n1->ncase.expr = n2 = (union node *)stalloc(sizeof (struct narg));
n2->type = NARG;
n2->narg.text = wordtext;
n2->narg.backquote = backquotelist;
n2->narg.next = NULL;
while (readtoken() == TNL);
if (lasttoken != TWORD || ! equal(wordtext, "in"))
synerror("expecting \"in\"");
cpp = &n1->ncase.cases;
while (checkkwd(), readtoken() == TWORD) {
*cpp = cp = (union node *)stalloc(sizeof (struct nclist));
cp->type = NCLIST;
app = &cp->nclist.pattern;
for (;;) {
*app = ap = (union node *)stalloc(sizeof (struct narg));
ap->type = NARG;
ap->narg.text = wordtext;
ap->narg.backquote = backquotelist;
if (readtoken() != TPIPE)
break;
app = &ap->narg.next;
if (readtoken() != TWORD)
synexpect(TWORD);
}
ap->narg.next = NULL;
if (lasttoken != TRP)
synexpect(TRP);
cp->nclist.body = list(0);
if ((t = readtoken()) == TESAC)
tokpushback++;
else if (t != TENDCASE)
synexpect(TENDCASE);
cpp = &cp->nclist.next;
}
*cpp = NULL;
if (lasttoken != TESAC)
synexpect(TESAC);
break;
case TLP:
n1 = (union node *)stalloc(sizeof (struct nredir));
n1->type = NSUBSHELL;
n1->nredir.n = list(0);
n1->nredir.redirect = NULL;
if (readtoken() != TRP)
synexpect(TRP);
break;
case TBEGIN:
n1 = list(0);
if (readtoken() != TEND)
synexpect(TEND);
break;
case TWORD:
case TREDIR:
tokpushback++;
return simplecmd();
default:
synexpect(-1);
}
/* Now check for redirection which may follow command */
rpp = &redir;
while (readtoken() == TREDIR) {
*rpp = n2 = redirnode;
rpp = &n2->nfile.next;
parsefname();
}
tokpushback++;
*rpp = NULL;
if (redir) {
if (n1->type != NSUBSHELL) {
n2 = (union node *)stalloc(sizeof (struct nredir));
n2->type = NREDIR;
n2->nredir.n = n1;
n1 = n2;
}
n1->nredir.redirect = redir;
}
return n1;
}
