/*
* Called only when a process in j has exited/stopped (ie, called only
* from j_sigchld()). If no processes are running, the job status
* and state are updated, asynchronous job notification is done and,
* if unneeded, the job is removed.
*
* If jobs are compiled in then this routine expects sigchld to be blocked.
*/
static void
check_job(Job *j)
{
int jstate;
Proc *p;
/* XXX debugging (nasty - interrupt routine using shl_out) */
if (!(j->flags & JF_STARTED)) {
internal_errorf(0, "check_job: job started (flags 0x%x)",
j->flags);
return;
}
jstate = PRUNNING;
for (p=j->proc_list; p != (Proc *) 0; p = p->next) {
if (p->state == PRUNNING)
return; /* some processes still running */
if (p->state > jstate)
jstate = p->state;
}
j->state = jstate;
switch (j->last_proc->state) {
case PEXITED:
j->status = WEXITSTATUS(j->last_proc->status);
break;
case PSIGNALLED:
j->status = 128 + WTERMSIG(j->last_proc->status);
break;
default:
j->status = 0;
break;
}
/* Note when co-process dies: can't be done in j_wait() nor
* remove_job() since neither may be called for non-interactive
* shells.
*/
if (j->state == PEXITED || j->state == PSIGNALLED) {
/* No need to keep co-process input any more
* (at least, this is what ksh93d thinks)
*/
if (coproc.job == j) {
coproc.job = (void *) 0;
/* XXX would be nice to get the closes out of here
* so they aren't done in the signal handler.
* Would mean a check in coproc_getfd() to
* do "if job == 0 && write >= 0, close write".
*/
coproc_write_close(coproc.write);
}
/* Do we need to keep the output? */
if (j->coproc_id && j->coproc_id == coproc.id &&
--coproc.njobs == 0)
coproc_readw_close(coproc.read);
}
j->flags |= JF_CHANGED;
#ifdef JOBS
if (Flag(FMONITOR) && !(j->flags & JF_XXCOM)) {
/* Only put stopped jobs at the front to avoid confusing
* the user (don't want finished jobs effecting %+ or %-)
*/
if (j->state == PSTOPPED)
put_job(j, PJ_ON_FRONT);
if (Flag(FNOTIFY) &&
(j->flags & (JF_WAITING|JF_W_ASYNCNOTIFY)) != JF_WAITING) {
/* Look for the real file descriptor 2 */
{
struct env *ep;
int fd = 2;
for (ep = e; ep; ep = ep->oenv)
if (ep->savefd && ep->savefd[2])
fd = ep->savefd[2];
shf_reopen(fd, SHF_WR, shl_j);
}
/* Can't call j_notify() as it removes jobs. The job
* must stay in the job list as j_waitj() may be
* running with this job.
*/
j_print(j, JP_MEDIUM, shl_j);
shf_flush(shl_j);
if (!(j->flags & JF_WAITING) && j->state != PSTOPPED)
remove_job(j, "notify");
}
}
#endif /* JOBS */
if (!Flag(FMONITOR) && !(j->flags & (JF_WAITING|JF_FG)) &&
j->state != PSTOPPED) {
if (j == async_job || (j->flags & JF_KNOWN)) {
j->flags |= JF_ZOMBIE;
j->job = -1;
nzombie++;
} else
remove_job(j, "checkjob");
}
}
/*
* set up redirection, saving old fds in e->savefd
*/
static int
iosetup(struct ioword *iop, struct tbl *tp)
{
int u = -1;
char *cp = iop->name;
int iotype = iop->flag & IOTYPE;
bool do_open = true, do_close = false;
int flags = 0;
struct ioword iotmp;
struct stat statb;
if (iotype != IOHERE)
cp = evalonestr(cp, DOTILDE|(Flag(FTALKING_I) ? DOGLOB : 0));
/* Used for tracing and error messages to print expanded cp */
iotmp = *iop;
iotmp.name = (iotype == IOHERE) ? NULL : cp;
iotmp.flag |= IONAMEXP;
if (Flag(FXTRACE))
shellf("%s%s\n",
substitute(str_val(global("PS4")), 0),
snptreef(NULL, 32, "%R", &iotmp));
switch (iotype) {
case IOREAD:
flags = O_RDONLY;
break;
case IOCAT:
flags = O_WRONLY | O_APPEND | O_CREAT;
break;
case IOWRITE:
flags = O_WRONLY | O_CREAT | O_TRUNC;
/*
* The stat() is here to allow redirections to
* things like /dev/null without error.
*/
if (Flag(FNOCLOBBER) && !(iop->flag & IOCLOB) &&
(stat(cp, &statb) < 0 || S_ISREG(statb.st_mode)))
flags |= O_EXCL;
break;
case IORDWR:
flags = O_RDWR | O_CREAT;
break;
case IOHERE:
do_open = false;
/* herein() returns -2 if error has been printed */
u = herein(iop, NULL);
/* cp may have wrong name */
break;
case IODUP: {
const char *emsg;
do_open = false;
if (*cp == '-' && !cp[1]) {
/* prevent error return below */
u = 1009;
do_close = true;
} else if ((u = check_fd(cp,
X_OK | ((iop->flag & IORDUP) ? R_OK : W_OK),
&emsg)) < 0) {
warningf(true, "%s: %s",
snptreef(NULL, 32, "%R", &iotmp), emsg);
return (-1);
}
if (u == iop->unit)
/* "dup from" == "dup to" */
return (0);
break;
}
}
if (do_open) {
if (Flag(FRESTRICTED) && (flags & O_CREAT)) {
warningf(true, "%s: %s", cp, "restricted");
return (-1);
}
u = open(cp, flags, 0666);
}
if (u < 0) {
/* herein() may already have printed message */
if (u == -1) {
u = errno;
warningf(true, "can't %s %s: %s",
iotype == IODUP ? "dup" :
(iotype == IOREAD || iotype == IOHERE) ?
"open" : "create", cp, cstrerror(u));
}
return (-1);
}
/* Do not save if it has already been redirected (i.e. "cat >x >y"). */
if (e->savefd[iop->unit] == 0) {
/* If these are the same, it means unit was previously closed */
if (u == iop->unit)
e->savefd[iop->unit] = -1;
else
/*
* c_exec() assumes e->savefd[fd] set for any
* redirections. Ask savefd() not to close iop->unit;
* this allows error messages to be seen if iop->unit
* is 2; also means we can't lose the fd (eg, both
* dup2 below and dup2 in restfd() failing).
*/
e->savefd[iop->unit] = savefd(iop->unit);
}
if (do_close)
close(iop->unit);
else if (u != iop->unit) {
if (ksh_dup2(u, iop->unit, true) < 0) {
int eno;
eno = errno;
warningf(true, "%s %s %s",
"can't finish (dup) redirection",
snptreef(NULL, 32, "%R", &iotmp),
cstrerror(eno));
if (iotype != IODUP)
close(u);
return (-1);
}
if (iotype != IODUP)
close(u);
/*
* Touching any co-process fd in an empty exec
* causes the shell to close its copies
*/
else if (tp && tp->type == CSHELL && tp->val.f == c_exec) {
if (iop->flag & IORDUP)
/* possible exec <&p */
coproc_read_close(u);
else
/* possible exec >&p */
coproc_write_close(u);
}
}
if (u == 2)
/* Clear any write errors */
shf_reopen(2, SHF_WR, shl_out);
return (0);
}
/*
* Called only when a process in j has exited/stopped (ie, called only
* from j_sigchld()). If no processes are running, the job status
* and state are updated, asynchronous job notification is done and,
* if unneeded, the job is removed.
*
* If jobs are compiled in then this routine expects sigchld to be blocked.
*/
static void
check_job(Job *j)
{
int jstate;
Proc *p;
/* XXX debugging (nasty - interrupt routine using shl_out) */
if (!(j->flags & JF_STARTED)) {
internal_errorf(0, "check_job: job started (flags 0x%x)",
j->flags);
return;
}
jstate = PRUNNING;
for (p=j->proc_list; p != (Proc *) 0; p = p->next) {
if (p->state == PRUNNING)
return; /* some processes still running */
if (p->state > jstate)
jstate = p->state;
}
j->state = jstate;
switch (j->last_proc->state) {
case PEXITED:
j->status = WEXITSTATUS(j->last_proc->status);
break;
case PSIGNALLED:
j->status = 128 + WTERMSIG(j->last_proc->status);
break;
default:
j->status = 0;
break;
}
/* Note when co-process dies: can't be done in j_wait() nor
* remove_job() since neither may be called for non-interactive
* shells.
*/
if (j->state == PEXITED || j->state == PSIGNALLED) {
/* No need to keep co-process input any more
* (at leasst, this is what ksh93d thinks)
*/
if (coproc.job == j) {
coproc.job = (void *) 0;
/* XXX would be nice to get the closes out of here
* so they aren't done in the signal handler.
* Would mean a check in coproc_getfd() to
* do "if job == 0 && write >= 0, close write".
*/
coproc_write_close(coproc.write);
}
/* Do we need to keep the output? */
if (j->coproc_id && j->coproc_id == coproc.id &&
--coproc.njobs == 0)
coproc_readw_close(coproc.read);
}
j->flags |= JF_CHANGED;
if (!(j->flags & (JF_WAITING|JF_FG))
&& j->state != PSTOPPED)
{
if (j == async_job || (j->flags & JF_KNOWN)) {
j->flags |= JF_ZOMBIE;
j->job = -1;
nzombie++;
} else
remove_job(j, "checkjob");
}
}
