xnu-517.9.5.tar.gz

[apple/xnu.git] / bsd / kern / tty.c

diff --git a/bsd/kern/tty.c b/bsd/kern/tty.c
index fc84d6f5fbdfa6c1fd84a996c32f504f95d8b761..dee8138ff8a9a28b6143f8edc4607c3b90675cf6 100644 (file)
--- a/bsd/kern/tty.c
+++ b/bsd/kern/tty.c
@@ -106,6 +106,8 @@
 #include <sys/kernel.h>
 #include <sys/vnode.h>
 #include <sys/syslog.h>
+#include <sys/user.h>
+#include <sys/signalvar.h>
 #include <sys/signalvar.h>
 #ifndef NeXT
 #include <sys/resourcevar.h>
@@ -794,7 +796,9 @@ ttioctl(tp, cmd, data, flag, p)
        register struct proc *p = curproc;      /* XXX */
 #endif
        int s, error;
+       struct uthread *ut;
 
+       ut = (struct uthread *)get_bsdthread_info(current_act());
        /* If the ioctl involves modification, hang if in the background. */
        switch (cmd) {
        case  TIOCFLUSH:
@@ -821,7 +825,7 @@ ttioctl(tp, cmd, data, flag, p)
                while (isbackground(p, tp) &&
                    (p->p_flag & P_PPWAIT) == 0 &&
                    (p->p_sigignore & sigmask(SIGTTOU)) == 0 &&
-                   (p->p_sigmask & sigmask(SIGTTOU)) == 0) {
+                   (ut->uu_sigmask & sigmask(SIGTTOU)) == 0) {
                        if (p->p_pgrp->pg_jobc == 0)
                                return (EIO);
                        pgsignal(p->p_pgrp, SIGTTOU, 1);
@@ -1096,6 +1100,10 @@ ttioctl(tp, cmd, data, flag, p)
                tp->t_pgrp = p->p_pgrp;
                p->p_session->s_ttyp = tp;
                p->p_flag |= P_CONTROLT;
+               /* The backgrounded process blocking on tty now 
+                * could be foregound process. Wake such processes
+                */
+               tty_pgsignal(tp->t_pgrp, SIGCONT);
                break;
        case TIOCSPGRP: {               /* set pgrp of tty */
                register struct pgrp *pgrp = pgfind(*(int *)data);
@@ -1105,6 +1113,10 @@ ttioctl(tp, cmd, data, flag, p)
                else if (pgrp == NULL || pgrp->pg_session != p->p_session)
                        return (EPERM);
                tp->t_pgrp = pgrp;
+               /* The backgrounded process blocking on tty now 
+                * could be foregound process. Wake such processes
+                */
+               tty_pgsignal(tp->t_pgrp, SIGCONT);
                break;
        }
        case TIOCSTAT:                  /* simulate control-T */
@@ -1573,8 +1585,12 @@ ttread(tp, uio, flag)
        int has_etime = 0, last_cc = 0;
        long slp = 0;           /* XXX this should be renamed `timo'. */
        boolean_t funnel_state;
+       struct uthread *ut;
 
        funnel_state = thread_funnel_set(kernel_flock, TRUE);
+
+       ut = (struct uthread *)get_bsdthread_info(current_act());
+
 loop:
        s = spltty();
        lflag = tp->t_lflag;
@@ -1594,7 +1610,7 @@ loop:
        if (isbackground(p, tp)) {
                splx(s);
                if ((p->p_sigignore & sigmask(SIGTTIN)) ||
-                  (p->p_sigmask & sigmask(SIGTTIN)) ||
+                  (ut->uu_sigmask & sigmask(SIGTTIN)) ||
                    p->p_flag & P_PPWAIT || p->p_pgrp->pg_jobc == 0) {
                        thread_funnel_set(kernel_flock, funnel_state);
                        return (EIO);
@@ -1880,16 +1896,19 @@ ttycheckoutq(tp, wait)
        int wait;
 {
        int hiwat, s, oldsig;
+       struct uthread *ut;
+
+       ut = (struct uthread *)get_bsdthread_info(current_act());
 
        hiwat = tp->t_hiwat;
        s = spltty();
-       oldsig = wait ? current_proc()->p_siglist : 0;
+       oldsig = wait ? ut->uu_siglist : 0;
        if (tp->t_outq.c_cc > hiwat + OBUFSIZ + 100)
                while (tp->t_outq.c_cc > hiwat) {
                        ttstart(tp);
                        if (tp->t_outq.c_cc <= hiwat)
                                break;
-                       if (wait == 0 || current_proc()->p_siglist != oldsig) {
+                       if (wait == 0 || ut->uu_siglist != oldsig) {
                                splx(s);
                                return (0);
                        }
@@ -1915,9 +1934,11 @@ ttwrite(tp, uio, flag)
        int i, hiwat, cnt, error, s;
        char obuf[OBUFSIZ];
        boolean_t funnel_state;
+       struct uthread *ut;
 
        funnel_state = thread_funnel_set(kernel_flock, TRUE);
 
+       ut = (struct uthread *)get_bsdthread_info(current_act());
        hiwat = tp->t_hiwat;
        cnt = uio->uio_resid;
        error = 0;
@@ -1951,7 +1972,7 @@ loop:
        if (isbackground(p, tp) &&
            ISSET(tp->t_lflag, TOSTOP) && (p->p_flag & P_PPWAIT) == 0 &&
            (p->p_sigignore & sigmask(SIGTTOU)) == 0 &&
-           (p->p_sigmask & sigmask(SIGTTOU)) == 0) {
+           (ut->uu_sigmask & sigmask(SIGTTOU)) == 0) {
                if (p->p_pgrp->pg_jobc == 0) {
                        error = EIO;
                        goto out;