Char *
blkexpand(Char *const *av)
{
struct Strbuf buf = Strbuf_INIT;
for (; *av; av++) {
Strbuf_append(&buf, *av);
if (av[1])
Strbuf_append1(&buf, ' ');
}
return Strbuf_finish(&buf);
}
static void
exportpath(Char **val)
{
struct Strbuf buf = Strbuf_INIT;
Char *exppath;
if (val)
while (*val) {
Strbuf_append(&buf, *val++);
if (*val == 0 || eq(*val, STRRparen))
break;
Strbuf_append1(&buf, PATHSEP);
}
exppath = Strbuf_finish(&buf);
cleanup_push(exppath, xfree);
tsetenv(STRKPATH, exppath);
cleanup_until(exppath);
}
/* tw_dollar():
* Expand $<n> args in buffer
*/
static const Char *
tw_dollar(const Char *str, Char **wl, size_t nwl, Char **result, Char sep,
const char *msg)
{
struct Strbuf buf = Strbuf_INIT;
Char *res;
const Char *sp;
for (sp = str; *sp && *sp != sep;)
if (sp[0] == '$' && sp[1] == ':' && Isdigit(sp[sp[2] == '-' ? 3 : 2])) {
int num, neg = 0;
sp += 2;
if (*sp == '-') {
neg = 1;
sp++;
}
for (num = *sp++ - '0'; Isdigit(*sp); num += 10 * num + *sp++ - '0')
continue;
if (neg)
num = nwl - num - 1;
if (num >= 0 && (size_t)num < nwl)
Strbuf_append(&buf, wl[num]);
}
else
Strbuf_append1(&buf, *sp++);
res = Strbuf_finish(&buf);
if (*sp++ == sep) {
*result = res;
return sp;
}
xfree(res);
/* Truncates data if WIDE_STRINGS */
stderror(ERR_COMPMIS, (int)sep, msg, short2str(str));
return --sp;
} /* end tw_dollar */
static int
globbrace(const Char *s, Char ***bl)
{
struct Strbuf gbuf = Strbuf_INIT;
struct blk_buf bb = BLK_BUF_INIT;
int i;
const Char *p, *pm, *pe, *pl;
size_t prefix_len;
/* copy part up to the brace */
for (p = s; *p != LBRC; p++)
;
prefix_len = p - s;
/* check for balanced braces */
for (i = 0, pe = ++p; *pe; pe++)
if (*pe == LBRK) {
/* Ignore everything between [] */
for (++pe; *pe != RBRK && *pe != EOS; pe++)
continue;
if (*pe == EOS)
return (-RBRK);
}
else if (*pe == LBRC)
i++;
else if (*pe == RBRC) {
if (i == 0)
break;
i--;
}
if (i != 0 || *pe == '\0')
return (-RBRC);
Strbuf_appendn(&gbuf, s, prefix_len);
for (i = 0, pl = pm = p; pm <= pe; pm++)
switch (*pm) {
case LBRK:
for (++pm; *pm != RBRK && *pm != EOS; pm++)
continue;
if (*pm == EOS) {
bb_cleanup(&bb);
xfree(gbuf.s);
return (-RBRK);
}
break;
case LBRC:
i++;
break;
case RBRC:
if (i) {
i--;
break;
}
/* FALLTHROUGH */
case ',':
if (i && *pm == ',')
break;
else {
gbuf.len = prefix_len;
Strbuf_appendn(&gbuf, pl, pm - pl);
Strbuf_append(&gbuf, pe + 1);
Strbuf_terminate(&gbuf);
bb_append(&bb, Strsave(gbuf.s));
pl = pm + 1;
}
break;
default:
break;
}
*bl = bb_finish(&bb);
xfree(gbuf.s);
return bb.len;
}
/*VARARGS 1*/
void
execute(struct command *t, volatile int wanttty, int *pipein, int *pipeout,
int do_glob)
{
int forked = 0;
const struct biltins * volatile bifunc;
pid_t pid = 0;
int pv[2];
sigset_t set;
static sigset_t csigset;
#ifdef VFORK
static int onosigchld = 0;
#endif /* VFORK */
static int nosigchld = 0;
(void) &wanttty;
(void) &forked;
(void) &bifunc;
if (t == 0)
return;
#ifdef WINNT_NATIVE
{
if ((varval(STRNTslowexec) == STRNULL) &&
!t->t_dcdr && !t->t_dcar && !t->t_dflg && !didfds &&
(intty || intact) && (t->t_dtyp == NODE_COMMAND) &&
!isbfunc(t)) {
if ((t->t_dcom[0][0] & (QUOTE | TRIM)) == QUOTE)
(void) Strcpy(t->t_dcom[0], t->t_dcom[0] + 1);
Dfix(t);
if (nt_try_fast_exec(t) == 0)
return;
}
}
#endif /* WINNT_NATIVE */
/*
* Ed [email protected] & Dominic [email protected]
* Sat Feb 25 03:13:11 PST 1995
* try implicit cd if we have a 1 word command
*/
if (implicit_cd && (intty || intact) && t->t_dcom && t->t_dcom[0] &&
t->t_dcom[0][0] && (blklen(t->t_dcom) == 1) && !noexec) {
Char *sCName;
struct stat stbuf;
char *pathname;
sCName = dollar(t->t_dcom[0]);
if (sCName != NULL && sCName[0] == '~') {
struct Strbuf buf = Strbuf_INIT;
const Char *name_end;
for (name_end = sCName + 1; *name_end != '\0' && *name_end != '/';
name_end++)
continue;
if (name_end != sCName + 1) {
Char *name, *home;
name = Strnsave(sCName + 1, name_end - (sCName + 1));
home = gethdir(name);
if (home != NULL) {
Strbuf_append(&buf, home);
xfree(home);
} else
Strbuf_append(&buf, name);
xfree(name);
} else
Strbuf_append(&buf, varval(STRhome));
Strbuf_append(&buf, name_end);
xfree(sCName);
sCName = Strbuf_finish(&buf);
}
pathname = short2str(sCName);
xfree(sCName);
/* if this is a dir, tack a "cd" on as the first arg */
if (pathname != NULL &&
((stat(pathname, &stbuf) != -1 && S_ISDIR(stbuf.st_mode))
#ifdef WINNT_NATIVE
|| (pathname[0] && pathname[1] == ':' && pathname[2] == '\0')
#endif /* WINNT_NATIVE */
)) {
Char *vCD[2];
Char **ot_dcom = t->t_dcom;
vCD[0] = Strsave(STRcd);
vCD[1] = NULL;
t->t_dcom = blkspl(vCD, ot_dcom);
xfree(ot_dcom);
if (implicit_cd > 1) {
blkpr(t->t_dcom);
xputchar( '\n' );
}
}
}
/*
* From: Michael Schroeder <*****@*****.**>
* Don't check for wantty > 0...
*/
if (t->t_dflg & F_AMPERSAND)
wanttty = 0;
switch (t->t_dtyp) {
case NODE_COMMAND:
if ((t->t_dcom[0][0] & (QUOTE | TRIM)) == QUOTE)
memmove(t->t_dcom[0], t->t_dcom[0] + 1,
(Strlen(t->t_dcom[0] + 1) + 1) * sizeof (*t->t_dcom[0]));
if ((t->t_dflg & F_REPEAT) == 0)
Dfix(t); /* $ " ' \ */
if (t->t_dcom[0] == 0) {
return;
}
/*FALLTHROUGH*/
case NODE_PAREN:
#ifdef BACKPIPE
if (t->t_dflg & F_PIPEIN)
mypipe(pipein);
#else /* !BACKPIPE */
if (t->t_dflg & F_PIPEOUT)
mypipe(pipeout);
#endif /* BACKPIPE */
/*
* Must do << early so parent will know where input pointer should be.
* If noexec then this is all we do.
*/
if (t->t_dflg & F_READ) {
xclose(0);
heredoc(t->t_dlef);
if (noexec)
xclose(0);
}
setcopy(STRstatus, STR0, VAR_READWRITE);
/*
* This mess is the necessary kludge to handle the prefix builtins:
* nice, nohup, time. These commands can also be used by themselves,
* and this is not handled here. This will also work when loops are
* parsed.
*/
while (t->t_dtyp == NODE_COMMAND)
if (eq(t->t_dcom[0], STRnice)) {
if (t->t_dcom[1]) {
if (strchr("+-", t->t_dcom[1][0])) {
if (t->t_dcom[2]) {
setname("nice");
t->t_nice = (unsigned char)getn(t->t_dcom[1]);
lshift(t->t_dcom, 2);
t->t_dflg |= F_NICE;
}
else
break;
}
else {
t->t_nice = 4;
lshift(t->t_dcom, 1);
t->t_dflg |= F_NICE;
}
}
else
break;
}
else if (eq(t->t_dcom[0], STRnohup)) {
if (t->t_dcom[1]) {
t->t_dflg |= F_NOHUP;
lshift(t->t_dcom, 1);
}
else
break;
}
else if (eq(t->t_dcom[0], STRhup)) {
if (t->t_dcom[1]) {
t->t_dflg |= F_HUP;
lshift(t->t_dcom, 1);
}
else
break;
}
else if (eq(t->t_dcom[0], STRtime)) {
if (t->t_dcom[1]) {
t->t_dflg |= F_TIME;
lshift(t->t_dcom, 1);
}
else
break;
}
#ifdef F_VER
else if (eq(t->t_dcom[0], STRver))
if (t->t_dcom[1] && t->t_dcom[2]) {
setname("ver");
t->t_systype = getv(t->t_dcom[1]);
lshift(t->t_dcom, 2);
t->t_dflg |= F_VER;
}
else
break;
#endif /* F_VER */
else
break;
/* is it a command */
if (t->t_dtyp == NODE_COMMAND) {
/*
* Check if we have a builtin function and remember which one.
*/
bifunc = isbfunc(t);
if (noexec) {
/*
* Continue for builtins that are part of the scripting language
*/
if (bifunc == NULL)
break;
if (bifunc->bfunct != (bfunc_t)dobreak &&
bifunc->bfunct != (bfunc_t)docontin &&
bifunc->bfunct != (bfunc_t)doelse &&
bifunc->bfunct != (bfunc_t)doend &&
bifunc->bfunct != (bfunc_t)doforeach&&
bifunc->bfunct != (bfunc_t)dogoto &&
bifunc->bfunct != (bfunc_t)doif &&
bifunc->bfunct != (bfunc_t)dorepeat &&
bifunc->bfunct != (bfunc_t)doswbrk &&
bifunc->bfunct != (bfunc_t)doswitch &&
bifunc->bfunct != (bfunc_t)dowhile &&
bifunc->bfunct != (bfunc_t)dozip)
break;
}
}
else { /* not a command */
bifunc = NULL;
if (noexec)
break;
}
/*
* GrP Executing a command - run jobcmd hook
* Don't run for builtins
* Don't run if we're not in a tty
* Don't run if we're not really executing
*/
/*
* CR - Charles Ross Aug 2005
* added "isoutatty".
* The new behavior is that the jobcmd won't be executed
* if stdout (SHOUT) isnt attached to a tty.. IE when
* redirecting, or using backquotes etc..
*/
if (t->t_dtyp == NODE_COMMAND && !bifunc && !noexec && intty && isoutatty) {
Char *cmd = unparse(t);
cleanup_push(cmd, xfree);
job_cmd(cmd);
cleanup_until(cmd);
}
/*
* We fork only if we are timed, or are not the end of a parenthesized
* list and not a simple builtin function. Simple meaning one that is
* not pipedout, niced, nohupped, or &'d. It would be nice(?) to not
* fork in some of these cases.
*/
#ifdef BACKPIPE
/*
* Can't have NOFORK for the tail of a pipe - because it is not the
* last command spawned (even if it is at the end of a parenthesised
* list).
*/
if (t->t_dflg & F_PIPEIN)
t->t_dflg &= ~(F_NOFORK);
#else
/*
* "command | builtin" may cause major misbehaviour as noted in
* in the BUGS file entry
* Subject: Redirected input to built-in functions misbehaves badly
* forking when the builtin is the end of the pipe corrects the
* problem.
*/
if (bifunc && (t->t_dflg & F_PIPEIN))
t->t_dflg &= ~(F_NOFORK);
#endif /* BACKPIPE */
/*
* Prevent forking cd, pushd, popd, chdir cause this will cause the
* shell not to change dir! (XXX: but only for nice?)
*/
if (bifunc && (bifunc->bfunct == (bfunc_t)dochngd ||
bifunc->bfunct == (bfunc_t)dopushd ||
bifunc->bfunct == (bfunc_t)dopopd))
t->t_dflg &= ~(F_NICE);
if (((t->t_dflg & F_TIME) || ((t->t_dflg & F_NOFORK) == 0 &&
(!bifunc || t->t_dflg &
(F_PIPEOUT | F_AMPERSAND | F_NICE | F_NOHUP | F_HUP)))) ||
/*
* We have to fork for eval too.
*/
(bifunc && (t->t_dflg & F_PIPEIN) != 0 &&
bifunc->bfunct == (bfunc_t)doeval)) {
#ifdef VFORK
if (t->t_dtyp == NODE_PAREN ||
t->t_dflg & (F_REPEAT | F_AMPERSAND) || bifunc)
#endif /* VFORK */
{
forked++;
/*
* We need to block SIGCHLD here, so that if the process does
* not die before we can set the process group
*/
if (wanttty >= 0 && !nosigchld) {
sigemptyset(&set);
sigaddset(&set, SIGCHLD);
(void)sigprocmask(SIG_BLOCK, &set, &csigset);
nosigchld = 1;
}
pid = pfork(t, wanttty);
if (pid == 0 && nosigchld) {
sigprocmask(SIG_SETMASK, &csigset, NULL);
nosigchld = 0;
}
else if (pid != 0 && (t->t_dflg & F_AMPERSAND))
backpid = pid;
}
#ifdef VFORK
else {
int ochild, osetintr, ohaderr, odidfds;
int oSHIN, oSHOUT, oSHDIAG, oOLDSTD, otpgrp;
int oisoutatty, oisdiagatty;
sigset_t oset, ocsigset;
# ifndef CLOSE_ON_EXEC
int odidcch;
# endif /* !CLOSE_ON_EXEC */
/*
* Prepare for the vfork by saving everything that the child
* corrupts before it exec's. Note that in some signal
* implementations which keep the signal info in user space
* (e.g. Sun's) it will also be necessary to save and restore
* the current sigvec's for the signals the child touches
* before it exec's.
*/
/*
* Sooooo true... If this is a Sun, save the sigvec's. (Skip
* Gilbrech - 11/22/87)
*/
# ifdef SAVESIGVEC
struct sigaction savesv[NSIGSAVED];
sigset_t savesm;
# endif /* SAVESIGVEC */
if (wanttty >= 0 && !nosigchld && !noexec) {
sigemptyset(&set);
sigaddset(&set, SIGCHLD);
(void)sigprocmask(SIG_BLOCK, &set, &csigset);
nosigchld = 1;
}
sigemptyset(&set);
sigaddset(&set, SIGCHLD);
sigaddset(&set, SIGINT);
(void)sigprocmask(SIG_BLOCK, &set, &oset);
ochild = child;
osetintr = setintr;
ohaderr = haderr;
odidfds = didfds;
# ifndef CLOSE_ON_EXEC
odidcch = didcch;
# endif /* !CLOSE_ON_EXEC */
oSHIN = SHIN;
oSHOUT = SHOUT;
oSHDIAG = SHDIAG;
oOLDSTD = OLDSTD;
otpgrp = tpgrp;
oisoutatty = isoutatty;
oisdiagatty = isdiagatty;
ocsigset = csigset;
onosigchld = nosigchld;
Vsav = Vdp = 0;
Vexpath = 0;
Vt = 0;
# ifdef SAVESIGVEC
savesigvec(savesv, savesm);
# endif /* SAVESIGVEC */
if (use_fork)
pid = fork();
else
pid = vfork();
if (pid < 0) {
# ifdef SAVESIGVEC
restoresigvec(savesv, savesm);
# endif /* SAVESIGVEC */
sigprocmask(SIG_SETMASK, &oset, NULL);
stderror(ERR_NOPROC);
}
forked++;
if (pid) { /* parent */
# ifdef SAVESIGVEC
restoresigvec(savesv, savesm);
# endif /* SAVESIGVEC */
child = ochild;
setintr = osetintr;
haderr = ohaderr;
didfds = odidfds;
SHIN = oSHIN;
# ifndef CLOSE_ON_EXEC
didcch = odidcch;
# endif /* !CLOSE_ON_EXEC */
SHOUT = oSHOUT;
SHDIAG = oSHDIAG;
OLDSTD = oOLDSTD;
tpgrp = otpgrp;
isoutatty = oisoutatty;
isdiagatty = oisdiagatty;
csigset = ocsigset;
nosigchld = onosigchld;
xfree(Vsav);
Vsav = 0;
xfree(Vdp);
Vdp = 0;
xfree(Vexpath);
Vexpath = 0;
blk_cleanup(Vt);
Vt = 0;
/* this is from pfork() */
palloc(pid, t);
sigprocmask(SIG_SETMASK, &oset, NULL);
}
else { /* child */
/* this is from pfork() */
pid_t pgrp;
int ignint = 0;
if (nosigchld) {
sigprocmask(SIG_SETMASK, &csigset, NULL);
nosigchld = 0;
}
if (setintr)
ignint = (tpgrp == -1 && (t->t_dflg & F_NOINTERRUPT))
|| (gointr && eq(gointr, STRminus));
pgrp = pcurrjob ? pcurrjob->p_jobid : getpid();
child++;
if (setintr) {
setintr = 0;
/*
* casts made right for SunOS 4.0 by Douglas C. Schmidt
* <*****@*****.**>
* (thanks! -- PWP)
*
* ignint ifs cleaned by Johan Widen <[email protected]>
* (thanks again)
*/
if (ignint) {
(void) signal(SIGINT, SIG_IGN);
(void) signal(SIGQUIT, SIG_IGN);
}
else {
(void) signal(SIGINT, vffree);
(void) signal(SIGQUIT, SIG_DFL);
}
# ifdef BSDJOBS
if (wanttty >= 0) {
(void) signal(SIGTSTP, SIG_DFL);
(void) signal(SIGTTIN, SIG_DFL);
(void) signal(SIGTTOU, SIG_DFL);
}
# endif /* BSDJOBS */
sigaction(SIGTERM, &parterm, NULL);
}
else if (tpgrp == -1 &&
(t->t_dflg & F_NOINTERRUPT)) {
(void) signal(SIGINT, SIG_IGN);
(void) signal(SIGQUIT, SIG_IGN);
}
pgetty(wanttty, pgrp);
if (t->t_dflg & F_NOHUP)
(void) signal(SIGHUP, SIG_IGN);
if (t->t_dflg & F_HUP)
(void) signal(SIGHUP, SIG_DFL);
if (t->t_dflg & F_NICE) {
int nval = SIGN_EXTEND_CHAR(t->t_nice);
# if defined(HAVE_SETPRIORITY) && defined(PRIO_PROCESS)
if (setpriority(PRIO_PROCESS, 0, nval) == -1 && errno)
stderror(ERR_SYSTEM, "setpriority",
strerror(errno));
# else /* !HAVE_SETPRIORITY || !PRIO_PROCESS */
(void) nice(nval);
# endif /* HAVE_SETPRIORITY && PRIO_PROCESS */
}
# ifdef F_VER
if (t->t_dflg & F_VER) {
tsetenv(STRSYSTYPE, t->t_systype ? STRbsd43 : STRsys53);
dohash(NULL, NULL);
}
# endif /* F_VER */
}
}
#endif /* VFORK */
}
if (pid != 0) {
/*
* It would be better if we could wait for the whole job when we
* knew the last process had been started. Pwait, in fact, does
* wait for the whole job anyway, but this test doesn't really
* express our intentions.
*/
#ifdef BACKPIPE
if (didfds == 0 && t->t_dflg & F_PIPEOUT) {
xclose(pipeout[0]);
xclose(pipeout[1]);
}
if ((t->t_dflg & F_PIPEIN) != 0)
break;
#else /* !BACKPIPE */
if (didfds == 0 && t->t_dflg & F_PIPEIN) {
xclose(pipein[0]);
xclose(pipein[1]);
}
if ((t->t_dflg & F_PIPEOUT) != 0)
break;
#endif /* BACKPIPE */
if (nosigchld) {
sigprocmask(SIG_SETMASK, &csigset, NULL);
nosigchld = 0;
}
if ((t->t_dflg & F_AMPERSAND) == 0)
pwait();
break;
}
doio(t, pipein, pipeout);
#ifdef BACKPIPE
if (t->t_dflg & F_PIPEIN) {
xclose(pipein[0]);
xclose(pipein[1]);
}
#else /* !BACKPIPE */
if (t->t_dflg & F_PIPEOUT) {
xclose(pipeout[0]);
xclose(pipeout[1]);
}
#endif /* BACKPIPE */
/*
* Perform a builtin function. If we are not forked, arrange for
* possible stopping
*/
if (bifunc) {
if (forked) {
func(t, bifunc);
exitstat();
} else {
jmp_buf_t oldexit;
int ohaderr = haderr;
getexit(oldexit);
if (setexit() == 0)
func(t, bifunc);
resexit(oldexit);
haderr = ohaderr;
if (adrof(STRprintexitvalue)) {
int rv = getn(varval(STRstatus));
if (rv != 0)
xprintf(CGETS(17, 2, "Exit %d\n"), rv);
}
}
break;
}
if (t->t_dtyp != NODE_PAREN) {
doexec(t, do_glob);
/* NOTREACHED */
}
/*
* For () commands must put new 0,1,2 in FSH* and recurse
*/
if ((OLDSTD = dcopy(0, FOLDSTD)) >= 0)
(void)close_on_exec(OLDSTD, 1);
if ((SHOUT = dcopy(1, FSHOUT)) >= 0) {
(void)close_on_exec(SHOUT, 1);
isoutatty = isatty(SHOUT);
}
if ((SHDIAG = dcopy(2, FSHDIAG)) >= 0) {
(void)close_on_exec(SHDIAG, 1);
isdiagatty = isatty(SHDIAG);
}
xclose(SHIN);
SHIN = -1;
#ifndef CLOSE_ON_EXEC
didcch = 0;
#else
(void) close_on_exec(FSHOUT, 1);
(void) close_on_exec(FSHDIAG, 1);
(void) close_on_exec(FOLDSTD, 1);
#endif /* !CLOSE_ON_EXEC */
didfds = 0;
wanttty = -1;
t->t_dspr->t_dflg |= t->t_dflg & (F_NOINTERRUPT | F_BACKQ);
execute(t->t_dspr, wanttty, NULL, NULL, do_glob);
exitstat();
case NODE_PIPE:
#ifdef BACKPIPE
t->t_dcdr->t_dflg |= F_PIPEIN | (t->t_dflg &
(F_PIPEOUT | F_AMPERSAND | F_NOFORK | F_NOINTERRUPT | F_BACKQ));
execute(t->t_dcdr, wanttty, pv, pipeout, do_glob);
t->t_dcar->t_dflg |= F_PIPEOUT | (t->t_dflg &
(F_PIPEIN | F_AMPERSAND | F_STDERR | F_NOINTERRUPT | F_BACKQ));
execute(t->t_dcar, wanttty, pipein, pv, do_glob);
#else /* !BACKPIPE */
t->t_dcar->t_dflg |= F_PIPEOUT | (t->t_dflg &
(F_PIPEIN | F_AMPERSAND | F_STDERR | F_NOINTERRUPT | F_BACKQ));
execute(t->t_dcar, wanttty, pipein, pv, do_glob);
t->t_dcdr->t_dflg |= F_PIPEIN | (t->t_dflg &
(F_PIPEOUT | F_AMPERSAND | F_NOFORK | F_NOINTERRUPT | F_BACKQ));
execute(t->t_dcdr, wanttty, pv, pipeout, do_glob);
#endif /* BACKPIPE */
break;
case NODE_LIST:
if (t->t_dcar) {
t->t_dcar->t_dflg |= t->t_dflg & (F_NOINTERRUPT | F_BACKQ);
execute(t->t_dcar, wanttty, NULL, NULL, do_glob);
/*
* In strange case of A&B make a new job after A
*/
if (t->t_dcar->t_dflg & F_AMPERSAND && t->t_dcdr &&
(t->t_dcdr->t_dflg & F_AMPERSAND) == 0)
pendjob();
}
if (t->t_dcdr) {
t->t_dcdr->t_dflg |= t->t_dflg &
(F_NOFORK | F_NOINTERRUPT | F_BACKQ);
execute(t->t_dcdr, wanttty, NULL, NULL, do_glob);
}
break;
case NODE_OR:
case NODE_AND:
if (t->t_dcar) {
t->t_dcar->t_dflg |= t->t_dflg & (F_NOINTERRUPT | F_BACKQ);
execute(t->t_dcar, wanttty, NULL, NULL, do_glob);
if ((getn(varval(STRstatus)) == 0) !=
(t->t_dtyp == NODE_AND)) {
return;
}
}
if (t->t_dcdr) {
t->t_dcdr->t_dflg |= t->t_dflg &
(F_NOFORK | F_NOINTERRUPT | F_BACKQ);
execute(t->t_dcdr, wanttty, NULL, NULL, do_glob);
}
break;
default:
break;
}
/*
* Fall through for all breaks from switch
*
* If there will be no more executions of this command, flush all file
* descriptors. Places that turn on the F_REPEAT bit are responsible for
* doing donefds after the last re-execution
*/
if (didfds && !(t->t_dflg & F_REPEAT))
donefds();
}
/*
* Handle the multitudinous $ expansion forms.
* Ugh.
*/
static void
Dgetdol(void)
{
Char *np;
struct varent *vp = NULL;
struct Strbuf *name = Strbuf_alloc();
eChar c, sc;
int subscr = 0, lwb = 1, upb = 0;
int dimen = 0, bitset = 0, length = 0;
static Char *dolbang = NULL;
cleanup_push(name, Strbuf_free);
dolmod.len = dolmcnt = dol_flag_a = 0;
c = sc = DgetC(0);
if (c == DEOF) {
stderror(ERR_SYNTAX);
return;
}
if (c == '{')
c = DgetC(0); /* sc is { to take } later */
if ((c & TRIM) == '#')
dimen++, c = DgetC(0); /* $# takes dimension */
else if (c == '?')
bitset++, c = DgetC(0); /* $? tests existence */
else if (c == '%')
length++, c = DgetC(0); /* $% returns length in chars */
switch (c) {
case '!':
if (dimen || bitset || length)
stderror(ERR_SYNTAX);
if (backpid != 0) {
xfree(dolbang);
setDolp(dolbang = putn((tcsh_number_t)backpid));
}
cleanup_until(name);
goto eatbrac;
case '$':
if (dimen || bitset || length)
stderror(ERR_SYNTAX);
setDolp(doldol);
cleanup_until(name);
goto eatbrac;
case '<'|QUOTE: {
static struct Strbuf wbuf; /* = Strbuf_INIT; */
if (bitset)
stderror(ERR_NOTALLOWED, "$?<");
if (dimen)
stderror(ERR_NOTALLOWED, "$#<");
if (length)
stderror(ERR_NOTALLOWED, "$%<");
wbuf.len = 0;
{
char cbuf[MB_LEN_MAX];
size_t cbp = 0;
int old_pintr_disabled;
for (;;) {
int len;
ssize_t res;
Char wc;
pintr_push_enable(&old_pintr_disabled);
res = force_read(OLDSTD, cbuf + cbp, 1);
cleanup_until(&old_pintr_disabled);
if (res != 1)
break;
cbp++;
len = normal_mbtowc(&wc, cbuf, cbp);
if (len == -1) {
reset_mbtowc();
if (cbp < MB_LEN_MAX)
continue; /* Maybe a partial character */
wc = (unsigned char)*cbuf | INVALID_BYTE;
}
if (len <= 0)
len = 1;
if (cbp != (size_t)len)
memmove(cbuf, cbuf + len, cbp - len);
cbp -= len;
if (wc == '\n')
break;
Strbuf_append1(&wbuf, wc);
}
while (cbp != 0) {
int len;
Char wc;
len = normal_mbtowc(&wc, cbuf, cbp);
if (len == -1) {
reset_mbtowc();
wc = (unsigned char)*cbuf | INVALID_BYTE;
}
if (len <= 0)
len = 1;
if (cbp != (size_t)len)
memmove(cbuf, cbuf + len, cbp - len);
cbp -= len;
if (wc == '\n')
break;
Strbuf_append1(&wbuf, wc);
}
Strbuf_terminate(&wbuf);
}
fixDolMod();
setDolp(wbuf.s); /* Kept allocated until next $< expansion */
cleanup_until(name);
goto eatbrac;
}
case '*':
Strbuf_append(name, STRargv);
Strbuf_terminate(name);
vp = adrof(STRargv);
subscr = -1; /* Prevent eating [...] */
break;
case DEOF:
case '\n':
np = dimen ? STRargv : (bitset ? STRstatus : NULL);
if (np) {
bitset = 0;
Strbuf_append(name, np);
Strbuf_terminate(name);
vp = adrof(np);
subscr = -1; /* Prevent eating [...] */
unDredc(c);
break;
}
else
stderror(ERR_SYNTAX);
/*NOTREACHED*/
default:
if (Isdigit(c)) {
if (dimen)
stderror(ERR_NOTALLOWED, "$#<num>");
subscr = 0;
do {
subscr = subscr * 10 + c - '0';
c = DgetC(0);
} while (c != DEOF && Isdigit(c));
unDredc(c);
if (subscr < 0)
stderror(ERR_RANGE);
if (subscr == 0) {
if (bitset) {
dolp = dolzero ? STR1 : STR0;
cleanup_until(name);
goto eatbrac;
}
if (ffile == 0)
stderror(ERR_DOLZERO);
if (length) {
length = Strlen(ffile);
addla(putn((tcsh_number_t)length));
}
else {
fixDolMod();
setDolp(ffile);
}
cleanup_until(name);
goto eatbrac;
}
#if 0
if (bitset)
stderror(ERR_NOTALLOWED, "$?<num>");
if (length)
stderror(ERR_NOTALLOWED, "$%<num>");
#endif
vp = adrof(STRargv);
if (vp == 0) {
vp = &nulargv;
cleanup_until(name);
goto eatmod;
}
break;
}
if (c == DEOF || !alnum(c)) {
np = dimen ? STRargv : (bitset ? STRstatus : NULL);
if (np) {
bitset = 0;
Strbuf_append(name, np);
Strbuf_terminate(name);
vp = adrof(np);
subscr = -1; /* Prevent eating [...] */
unDredc(c);
break;
}
else
stderror(ERR_VARALNUM);
}
for (;;) {
Strbuf_append1(name, (Char) c);
c = DgetC(0);
if (c == DEOF || !alnum(c))
break;
}
Strbuf_terminate(name);
unDredc(c);
vp = adrof(name->s);
}
if (bitset) {
dolp = (vp || getenv(short2str(name->s))) ? STR1 : STR0;
cleanup_until(name);
goto eatbrac;
}
if (vp == NULL || vp->vec == NULL) {
np = str2short(getenv(short2str(name->s)));
if (np) {
static Char *env_val; /* = NULL; */
cleanup_until(name);
fixDolMod();
if (length) {
addla(putn((tcsh_number_t)Strlen(np)));
} else {
xfree(env_val);
env_val = Strsave(np);
setDolp(env_val);
}
goto eatbrac;
}
udvar(name->s);
/* NOTREACHED */
}
cleanup_until(name);
c = DgetC(0);
upb = blklen(vp->vec);
if (dimen == 0 && subscr == 0 && c == '[') {
name = Strbuf_alloc();
cleanup_push(name, Strbuf_free);
np = name->s;
for (;;) {
c = DgetC(DODOL); /* Allow $ expand within [ ] */
if (c == ']')
break;
if (c == '\n' || c == DEOF)
stderror(ERR_INCBR);
Strbuf_append1(name, (Char) c);
}
Strbuf_terminate(name);
np = name->s;
if (dolp || dolcnt) /* $ exp must end before ] */
stderror(ERR_EXPORD);
if (!*np)
stderror(ERR_SYNTAX);
if (Isdigit(*np)) {
int i;
for (i = 0; Isdigit(*np); i = i * 10 + *np++ - '0')
continue;
if (i < 0 || (i > upb && !any("-*", *np))) {
cleanup_until(name);
dolerror(vp->v_name);
return;
}
lwb = i;
if (!*np)
upb = lwb, np = STRstar;
}
if (*np == '*')
np++;
else if (*np != '-')
stderror(ERR_MISSING, '-');
else {
int i = upb;
np++;
if (Isdigit(*np)) {
i = 0;
while (Isdigit(*np))
i = i * 10 + *np++ - '0';
if (i < 0 || i > upb) {
cleanup_until(name);
dolerror(vp->v_name);
return;
}
}
if (i < lwb)
upb = lwb - 1;
else
upb = i;
}
if (lwb == 0) {
if (upb != 0) {
cleanup_until(name);
dolerror(vp->v_name);
return;
}
upb = -1;
}
if (*np)
stderror(ERR_SYNTAX);
cleanup_until(name);
}
else {
if (subscr > 0) {
if (subscr > upb)
lwb = 1, upb = 0;
else
lwb = upb = subscr;
}
unDredc(c);
}
if (dimen) {
/* this is a kludge. It prevents Dgetdol() from */
/* pushing erroneous ${#<error> values into the labuf. */
if (sc == '{') {
c = Dredc();
if (c != '}')
stderror(ERR_MISSING, '}');
unDredc(c);
}
addla(putn((tcsh_number_t)(upb - lwb + 1)));
}
else if (length) {
int i;
for (i = lwb - 1, length = 0; i < upb; i++)
length += Strlen(vp->vec[i]);
#ifdef notdef
/* We don't want that, since we can always compute it by adding $#xxx */
length += i - 1; /* Add the number of spaces in */
#endif
addla(putn((tcsh_number_t)length));
}
else {
eatmod:
fixDolMod();
dolnxt = &vp->vec[lwb - 1];
dolcnt = upb - lwb + 1;
}
eatbrac:
if (sc == '{') {
c = Dredc();
if (c != '}')
stderror(ERR_MISSING, '}');
}
}
/*
* dfollow - change to arg directory; fall back on cdpath if not valid
*/
static Char *
dfollow(Char *cp, int old)
{
Char *dp;
struct varent *c;
int serrno;
cp = old ? Strsave(cp) : globone(cp, G_ERROR);
cleanup_push(cp, xfree);
#ifdef apollo
if (Strchr(cp, '`')) {
char *dptr;
if (chdir(dptr = short2str(cp)) < 0)
stderror(ERR_SYSTEM, dptr, strerror(errno));
dp = agetcwd();
cleanup_push(dp, xfree);
if (dp != NULL) {
cleanup_until(cp);
return dgoto(dp);
}
else
stderror(ERR_SYSTEM, dptr, strerror(errno));
}
#endif /* apollo */
/*
* if we are ignoring symlinks, try to fix relatives now.
* if we are expading symlinks, it should be done by now.
*/
dp = dnormalize(cp, symlinks == SYM_IGNORE);
if (chdir(short2str(dp)) >= 0) {
cleanup_until(cp);
return dgoto(dp);
}
else {
xfree(dp);
if (chdir(short2str(cp)) >= 0) {
cleanup_ignore(cp);
cleanup_until(cp);
return dgoto(cp);
}
else if (errno != ENOENT && errno != ENOTDIR) {
int err;
err = errno;
stderror(ERR_SYSTEM, short2str(cp), strerror(err));
}
serrno = errno;
}
if (cp[0] != '/' && !prefix(STRdotsl, cp) && !prefix(STRdotdotsl, cp)
&& (c = adrof(STRcdpath)) && c->vec != NULL) {
struct Strbuf buf = Strbuf_INIT;
Char **cdp;
for (cdp = c->vec; *cdp; cdp++) {
size_t len = Strlen(*cdp);
buf.len = 0;
if (len > 0) {
Strbuf_append(&buf, *cdp);
if ((*cdp)[len - 1] != '/')
Strbuf_append1(&buf, '/');
}
Strbuf_append(&buf, cp);
Strbuf_terminate(&buf);
/*
* We always want to fix the directory here
* If we are normalizing symlinks
*/
dp = dnormalize(buf.s, symlinks == SYM_IGNORE ||
symlinks == SYM_EXPAND);
if (chdir(short2str(dp)) >= 0) {
printd = 1;
xfree(buf.s);
cleanup_until(cp);
return dgoto(dp);
}
else if (chdir(short2str(cp)) >= 0) {
printd = 1;
xfree(dp);
xfree(buf.s);
cleanup_ignore(cp);
cleanup_until(cp);
return dgoto(cp);
}
}
xfree(buf.s);
}
dp = varval(cp);
if ((dp[0] == '/' || dp[0] == '.') && chdir(short2str(dp)) >= 0) {
cleanup_until(cp);
cp = Strsave(dp);
printd = 1;
return dgoto(cp);
}
/*
* on login source of ~/.cshdirs, errors are eaten. the dir stack is all
* directories we could get to.
*/
if (!bequiet)
stderror(ERR_SYSTEM, short2str(cp), strerror(serrno));
cleanup_until(cp);
return (NULL);
}
