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Diffstat (limited to 'arch/um/drivers/chan_user.c')
-rw-r--r--arch/um/drivers/chan_user.c46
1 files changed, 26 insertions, 20 deletions
diff --git a/arch/um/drivers/chan_user.c b/arch/um/drivers/chan_user.c
index 25727ed648..ec04e47b9d 100644
--- a/arch/um/drivers/chan_user.c
+++ b/arch/um/drivers/chan_user.c
@@ -19,7 +19,7 @@ void generic_close(int fd, void *unused)
close(fd);
}
-int generic_read(int fd, char *c_out, void *unused)
+int generic_read(int fd, __u8 *c_out, void *unused)
{
int n;
@@ -35,7 +35,7 @@ int generic_read(int fd, char *c_out, void *unused)
/* XXX Trivial wrapper around write */
-int generic_write(int fd, const char *buf, int n, void *unused)
+int generic_write(int fd, const __u8 *buf, size_t n, void *unused)
{
int err;
@@ -141,7 +141,7 @@ struct winch_data {
int pipe_fd;
};
-static int winch_thread(void *arg)
+static __noreturn int winch_thread(void *arg)
{
struct winch_data *data = arg;
sigset_t sigs;
@@ -153,8 +153,8 @@ static int winch_thread(void *arg)
pipe_fd = data->pipe_fd;
count = write(pipe_fd, &c, sizeof(c));
if (count != sizeof(c))
- printk(UM_KERN_ERR "winch_thread : failed to write "
- "synchronization byte, err = %d\n", -count);
+ os_info("winch_thread : failed to write synchronization byte, err = %d\n",
+ -count);
/*
* We are not using SIG_IGN on purpose, so don't fix it as I thought to
@@ -166,29 +166,29 @@ static int winch_thread(void *arg)
sigfillset(&sigs);
/* Block all signals possible. */
if (sigprocmask(SIG_SETMASK, &sigs, NULL) < 0) {
- printk(UM_KERN_ERR "winch_thread : sigprocmask failed, "
- "errno = %d\n", errno);
- exit(1);
+ os_info("winch_thread : sigprocmask failed, errno = %d\n",
+ errno);
+ goto wait_kill;
}
/* In sigsuspend(), block anything else than SIGWINCH. */
sigdelset(&sigs, SIGWINCH);
if (setsid() < 0) {
- printk(UM_KERN_ERR "winch_thread : setsid failed, errno = %d\n",
+ os_info("winch_thread : setsid failed, errno = %d\n",
errno);
- exit(1);
+ goto wait_kill;
}
if (ioctl(pty_fd, TIOCSCTTY, 0) < 0) {
- printk(UM_KERN_ERR "winch_thread : TIOCSCTTY failed on "
- "fd %d err = %d\n", pty_fd, errno);
- exit(1);
+ os_info("winch_thread : TIOCSCTTY failed on "
+ "fd %d err = %d\n", pty_fd, errno);
+ goto wait_kill;
}
if (tcsetpgrp(pty_fd, os_getpid()) < 0) {
- printk(UM_KERN_ERR "winch_thread : tcsetpgrp failed on "
- "fd %d err = %d\n", pty_fd, errno);
- exit(1);
+ os_info("winch_thread : tcsetpgrp failed on fd %d err = %d\n",
+ pty_fd, errno);
+ goto wait_kill;
}
/*
@@ -199,8 +199,8 @@ static int winch_thread(void *arg)
*/
count = read(pipe_fd, &c, sizeof(c));
if (count != sizeof(c))
- printk(UM_KERN_ERR "winch_thread : failed to read "
- "synchronization byte, err = %d\n", errno);
+ os_info("winch_thread : failed to read synchronization byte, err = %d\n",
+ errno);
while(1) {
/*
@@ -211,9 +211,15 @@ static int winch_thread(void *arg)
count = write(pipe_fd, &c, sizeof(c));
if (count != sizeof(c))
- printk(UM_KERN_ERR "winch_thread : write failed, "
- "err = %d\n", errno);
+ os_info("winch_thread : write failed, err = %d\n",
+ errno);
}
+
+wait_kill:
+ c = 2;
+ count = write(pipe_fd, &c, sizeof(c));
+ while (1)
+ pause();
}
static int winch_tramp(int fd, struct tty_port *port, int *fd_out,