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jobctl/tty: foreground/background and send sighup on unregister

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Matheus
2024-05-21 17:48:41 -03:00
parent 0b01bd5e9d
commit 3587dfa28e
6 changed files with 226 additions and 3 deletions
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kernel-src/sys/jobctl.c
+78 -2
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@@ -49,11 +49,19 @@ void jobctl_setctty(proc_t *proc, void *_ctty) {
if (tty == NULL && proc->session.controllingtty) {
unholdtty = proc->session.controllingtty;
proc->session.controllingtty = NULL;
spinlock_acquire(&unholdtty->sessionlock);
unholdtty->session = NULL;
spinlock_release(&unholdtty->sessionlock);
}
if (tty && proc->session.controllingtty == NULL) {
VOP_HOLD(tty->mastervnode);
proc->session.controllingtty = tty;
spinlock_acquire(&tty->sessionlock);
if (tty->session == NULL) {
VOP_HOLD(tty->mastervnode);
proc->session.controllingtty = tty;
tty->session = proc;
}
spinlock_release(&tty->sessionlock);
}
leave:
@@ -226,6 +234,8 @@ void jobctl_detach(proc_t *proc) {
// called on process exit (when the last userland thread is exiting)
proc_t *unholdpgrp = NULL;
proc_t *unholdsession = NULL;
proc_t *foreground = NULL;
bool intstatus = interrupt_set(false);
spinlock_acquire(&proc->jobctllock);
@@ -238,6 +248,10 @@ void jobctl_detach(proc_t *proc) {
if (proc->session.leader) {
unholdsession = proc->session.leader;
proc->session.leader = NULL;
} else {
// send sighup and sigcont to all processes in the foreground group
foreground = proc->session.foreground ? proc->session.foreground : proc;
PROC_HOLD(foreground);
}
spinlock_release(&proc->jobctllock);
@@ -249,6 +263,11 @@ void jobctl_detach(proc_t *proc) {
if (unholdsession) {
PROC_RELEASE(unholdsession);
} else {
jobctl_setctty(proc, NULL);
jobctl_signal(foreground, SIGHUP);
jobctl_signal(foreground, SIGCONT);
PROC_RELEASE(foreground);
}
}
@@ -272,6 +291,63 @@ void jobctl_addproc(proc_t *parent, proc_t *proc) {
interrupt_set(intstatus);
}
proc_t *jobctl_getforeground(proc_t *proc) {
proc_t *foreground = NULL;
bool intstatus = interrupt_set(false);
spinlock_acquire(&proc->jobctllock);
if (proc->session.leader)
goto leave;
foreground = proc->session.foreground ? proc->session.foreground : proc;
PROC_HOLD(foreground);
leave:
spinlock_release(&proc->jobctllock);
interrupt_set(intstatus);
return foreground;
}
int jobctl_setforeground(proc_t *session, proc_t *pgrp) {
proc_t *unhold = NULL;
int error = 0;
bool intstatus = interrupt_set(false);
spinlock_acquire(&session->jobctllock);
if (session->session.leader) {
error = EINVAL;
goto leave;
}
if (session != pgrp) {
spinlock_acquire(&pgrp->jobctllock);
if (pgrp->pgrp.leader || pgrp->session.leader != session) {
error = EPERM;
goto leave;
}
}
if (session->session.foreground)
unhold = session->session.foreground;
session->session.foreground = pgrp;
PROC_HOLD(pgrp);
leave:
if (session != pgrp)
spinlock_release(&pgrp->jobctllock);
spinlock_release(&session->jobctllock);
interrupt_set(intstatus);
if (unhold) {
PROC_RELEASE(unhold);
}
return error;
}
void jobctl_procremove(proc_t *proc) {
// called after all refcounts to a proc are released
// cleans up session stuff