static void
addfname(char *name)
{
char *p;
struct strlist *sp;
p = stsavestr(name);
sp = (struct strlist *)stalloc(sizeof *sp);
sp->text = p;
*exparg.lastp = sp;
exparg.lastp = &sp->next;
}
/*
* Called to execute a trap. Perhaps we should avoid entering new trap
* handlers while we are executing a trap handler.
*/
void
dotrap(void)
{
struct stackmark smark;
int i;
int savestatus, prev_evalskip, prev_skipcount;
in_dotrap++;
for (;;) {
pendingsig = 0;
pendingsig_waitcmd = 0;
for (i = 1; i < NSIG; i++) {
if (gotsig[i]) {
gotsig[i] = 0;
if (trap[i]) {
/*
* Ignore SIGCHLD to avoid infinite
* recursion if the trap action does
* a fork.
*/
if (i == SIGCHLD)
ignore_sigchld++;
/*
* Backup current evalskip
* state and reset it before
* executing a trap, so that the
* trap is not disturbed by an
* ongoing break/continue/return
* statement.
*/
prev_evalskip = evalskip;
prev_skipcount = skipcount;
evalskip = 0;
last_trapsig = i;
savestatus = exitstatus;
setstackmark(&smark);
evalstring(stsavestr(trap[i]), 0);
popstackmark(&smark);
/*
* If such a command was not
* already in progress, allow a
* break/continue/return in the
* trap action to have an effect
* outside of it.
*/
if (evalskip == 0 ||
prev_evalskip != 0) {
evalskip = prev_evalskip;
skipcount = prev_skipcount;
exitstatus = savestatus;
}
if (i == SIGCHLD)
ignore_sigchld--;
}
break;
}
}
if (i >= NSIG)
break;
}
in_dotrap--;
}
static void
expmeta(char *enddir, char *name, struct arglist *arglist)
{
const char *p;
const char *q;
const char *start;
char *endname;
int metaflag;
struct stat statb;
DIR *dirp;
struct dirent *dp;
int atend;
int matchdot;
int esc;
int namlen;
metaflag = 0;
start = name;
for (p = name; esc = 0, *p; p += esc + 1) {
if (*p == '*' || *p == '?')
metaflag = 1;
else if (*p == '[') {
q = p + 1;
if (*q == '!' || *q == '^')
q++;
for (;;) {
if (*q == CTLESC)
q++;
if (*q == '/' || *q == '\0')
break;
if (*++q == ']') {
metaflag = 1;
break;
}
}
} else if (*p == '\0')
break;
else {
if (*p == CTLESC)
esc++;
if (p[esc] == '/') {
if (metaflag)
break;
start = p + esc + 1;
}
}
}
if (metaflag == 0) { /* we've reached the end of the file name */
if (enddir != expdir)
metaflag++;
for (p = name ; ; p++) {
if (*p == CTLESC)
p++;
*enddir++ = *p;
if (*p == '\0')
break;
if (enddir == expdir_end)
return;
}
if (metaflag == 0 || lstat(expdir, &statb) >= 0)
appendarglist(arglist, stsavestr(expdir));
return;
}
endname = name + (p - name);
if (start != name) {
p = name;
while (p < start) {
if (*p == CTLESC)
p++;
*enddir++ = *p++;
if (enddir == expdir_end)
return;
}
}
if (enddir == expdir) {
p = ".";
} else if (enddir == expdir + 1 && *expdir == '/') {
p = "/";
} else {
p = expdir;
enddir[-1] = '\0';
}
if ((dirp = opendir(p)) == NULL)
return;
if (enddir != expdir)
enddir[-1] = '/';
if (*endname == 0) {
atend = 1;
} else {
atend = 0;
*endname = '\0';
endname += esc + 1;
}
matchdot = 0;
p = start;
if (*p == CTLESC)
p++;
if (*p == '.')
matchdot++;
while (! int_pending() && (dp = readdir(dirp)) != NULL) {
if (dp->d_name[0] == '.' && ! matchdot)
continue;
if (patmatch(start, dp->d_name)) {
namlen = dp->d_namlen;
if (enddir + namlen + 1 > expdir_end)
continue;
memcpy(enddir, dp->d_name, namlen + 1);
if (atend)
appendarglist(arglist, stsavestr(expdir));
else {
if (dp->d_type != DT_UNKNOWN &&
dp->d_type != DT_DIR &&
dp->d_type != DT_LNK)
continue;
if (enddir + namlen + 2 > expdir_end)
continue;
enddir[namlen] = '/';
enddir[namlen + 1] = '\0';
expmeta(enddir + namlen + 1, endname, arglist);
}
}
}
closedir(dirp);
if (! atend)
endname[-esc - 1] = esc ? CTLESC : '/';
}