-/*
- * Copyright (C) 2000 - 2003 Jeff Dike (jdike@addtoit.com)
+/*
+ * Copyright (C) 2000 - 2007 Jeff Dike (jdike@{linux.intel,addtoit}.com)
* Licensed under the GPL
*/
-#include <unistd.h>
#include <stdlib.h>
+#include <unistd.h>
#include <errno.h>
-#include <termios.h>
-#include <string.h>
-#include <signal.h>
#include <sched.h>
-#include <sys/stat.h>
+#include <signal.h>
+#include <termios.h>
#include <sys/ioctl.h>
-#include <sys/socket.h>
-#include "kern_util.h"
#include "chan_user.h"
-#include "user.h"
#include "os.h"
-#include "choose-mode.h"
-#include "mode.h"
+#include "um_malloc.h"
+#include "user.h"
+
+void generic_close(int fd, void *unused)
+{
+ close(fd);
+}
+
+int generic_read(int fd, char *c_out, void *unused)
+{
+ int n;
+
+ n = read(fd, c_out, sizeof(*c_out));
+ if (n > 0)
+ return n;
+ else if (errno == EAGAIN)
+ return 0;
+ else if (n == 0)
+ return -EIO;
+ return -errno;
+}
+
+/* XXX Trivial wrapper around write */
+
+int generic_write(int fd, const char *buf, int n, void *unused)
+{
+ int err;
+
+ err = write(fd, buf, n);
+ if (err > 0)
+ return err;
+ else if (errno == EAGAIN)
+ return 0;
+ else if (err == 0)
+ return -EIO;
+ return -errno;
+}
+
+int generic_window_size(int fd, void *unused, unsigned short *rows_out,
+ unsigned short *cols_out)
+{
+ struct winsize size;
+ int ret;
+
+ if (ioctl(fd, TIOCGWINSZ, &size) < 0)
+ return -errno;
+
+ ret = ((*rows_out != size.ws_row) || (*cols_out != size.ws_col));
+
+ *rows_out = size.ws_row;
+ *cols_out = size.ws_col;
+
+ return ret;
+}
+
+void generic_free(void *data)
+{
+ kfree(data);
+}
int generic_console_write(int fd, const char *buf, int n)
{
+ sigset_t old, no_sigio;
struct termios save, new;
int err;
- if(isatty(fd)){
+ if (isatty(fd)) {
+ sigemptyset(&no_sigio);
+ sigaddset(&no_sigio, SIGIO);
+ if (sigprocmask(SIG_BLOCK, &no_sigio, &old))
+ goto error;
+
CATCH_EINTR(err = tcgetattr(fd, &save));
if (err)
goto error;
new = save;
- /* The terminal becomes a bit less raw, to handle \n also as
+ /*
+ * The terminal becomes a bit less raw, to handle \n also as
* "Carriage Return", not only as "New Line". Otherwise, the new
- * line won't start at the first column.*/
+ * line won't start at the first column.
+ */
new.c_oflag |= OPOST;
CATCH_EINTR(err = tcsetattr(fd, TCSAFLUSH, &new));
if (err)
goto error;
}
err = generic_write(fd, buf, n, NULL);
- /* Restore raw mode, in any case; we *must* ignore any error apart
- * EINTR, except for debug.*/
- if(isatty(fd))
+ /*
+ * Restore raw mode, in any case; we *must* ignore any error apart
+ * EINTR, except for debug.
+ */
+ if (isatty(fd)) {
CATCH_EINTR(tcsetattr(fd, TCSAFLUSH, &save));
- return(err);
+ sigprocmask(SIG_SETMASK, &old, NULL);
+ }
+
+ return err;
error:
- return(-errno);
+ return -errno;
}
/*
struct winch_data *data = arg;
sigset_t sigs;
int pty_fd, pipe_fd;
- int count, err;
+ int count;
char c = 1;
pty_fd = data->pty_fd;
pipe_fd = data->pipe_fd;
- count = os_write_file(pipe_fd, &c, sizeof(c));
- if(count != sizeof(c))
- printk("winch_thread : failed to write synchronization "
- "byte, err = %d\n", -count);
+ 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);
- /* We are not using SIG_IGN on purpose, so don't fix it as I thought to
+ /*
+ * We are not using SIG_IGN on purpose, so don't fix it as I thought to
* do! If using SIG_IGN, the sigsuspend() call below would not stop on
- * SIGWINCH. */
+ * SIGWINCH.
+ */
signal(SIGWINCH, winch_handler);
sigfillset(&sigs);
/* Block all signals possible. */
- if(sigprocmask(SIG_SETMASK, &sigs, NULL) < 0){
- printk("winch_thread : sigprocmask failed, errno = %d\n",
- errno);
+ if (sigprocmask(SIG_SETMASK, &sigs, NULL) < 0) {
+ printk(UM_KERN_ERR "winch_thread : sigprocmask failed, "
+ "errno = %d\n", errno);
exit(1);
}
/* In sigsuspend(), block anything else than SIGWINCH. */
sigdelset(&sigs, SIGWINCH);
- if(setsid() < 0){
- printk("winch_thread : setsid failed, errno = %d\n", errno);
+ if (setsid() < 0) {
+ printk(UM_KERN_ERR "winch_thread : setsid failed, errno = %d\n",
+ errno);
exit(1);
}
- err = os_new_tty_pgrp(pty_fd, os_getpid());
- if(err < 0){
- printk("winch_thread : new_tty_pgrp failed on fd %d, "
- "err = %d\n", pty_fd, -err);
+ 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);
}
- /* These are synchronization calls between various UML threads on the
+ 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);
+ }
+
+ /*
+ * These are synchronization calls between various UML threads on the
* host - since they are not different kernel threads, we cannot use
* kernel semaphores. We don't use SysV semaphores because they are
- * persistent. */
- count = os_read_file(pipe_fd, &c, sizeof(c));
- if(count != sizeof(c))
- printk("winch_thread : failed to read synchronization byte, "
- "err = %d\n", -count);
-
- while(1){
- /* This will be interrupted by SIGWINCH only, since
+ * persistent.
+ */
+ 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);
+
+ while(1) {
+ /*
+ * This will be interrupted by SIGWINCH only, since
* other signals are blocked.
*/
sigsuspend(&sigs);
- count = os_write_file(pipe_fd, &c, sizeof(c));
- if(count != sizeof(c))
- printk("winch_thread : write failed, err = %d\n",
- -count);
+ count = write(pipe_fd, &c, sizeof(c));
+ if (count != sizeof(c))
+ printk(UM_KERN_ERR "winch_thread : write failed, "
+ "err = %d\n", errno);
}
}
char c;
err = os_pipe(fds, 1, 1);
- if(err < 0){
- printk("winch_tramp : os_pipe failed, err = %d\n", -err);
+ if (err < 0) {
+ printk(UM_KERN_ERR "winch_tramp : os_pipe failed, err = %d\n",
+ -err);
goto out;
}
data = ((struct winch_data) { .pty_fd = fd,
.pipe_fd = fds[1] } );
- /* CLONE_FILES so this thread doesn't hold open files which are open
+ /*
+ * CLONE_FILES so this thread doesn't hold open files which are open
* now, but later closed in a different thread. This is a
* problem with /dev/net/tun, which if held open by this
* thread, prevents the TUN/TAP device from being reused.
*/
err = run_helper_thread(winch_thread, &data, CLONE_FILES, stack_out);
- if(err < 0){
- printk("fork of winch_thread failed - errno = %d\n", -err);
+ if (err < 0) {
+ printk(UM_KERN_ERR "fork of winch_thread failed - errno = %d\n",
+ -err);
goto out_close;
}
*fd_out = fds[0];
- n = os_read_file(fds[0], &c, sizeof(c));
- if(n != sizeof(c)){
- printk("winch_tramp : failed to read synchronization byte\n");
- printk("read failed, err = %d\n", -n);
- printk("fd %d will not support SIGWINCH\n", fd);
- err = -EINVAL;
+ n = read(fds[0], &c, sizeof(c));
+ if (n != sizeof(c)) {
+ printk(UM_KERN_ERR "winch_tramp : failed to read "
+ "synchronization byte\n");
+ printk(UM_KERN_ERR "read failed, err = %d\n", errno);
+ printk(UM_KERN_ERR "fd %d will not support SIGWINCH\n", fd);
+ err = -EINVAL;
goto out_close;
}
if (os_set_fd_block(*fd_out, 0)) {
- printk("winch_tramp: failed to set thread_fd non-blocking.\n");
+ printk(UM_KERN_ERR "winch_tramp: failed to set thread_fd "
+ "non-blocking.\n");
goto out_close;
}
return err;
out_close:
- os_close_file(fds[1]);
- os_close_file(fds[0]);
+ close(fds[1]);
+ close(fds[0]);
out:
return err;
}
int pid, thread, count, thread_fd = -1;
char c = 1;
- if(!isatty(fd))
+ if (!isatty(fd))
return;
pid = tcgetpgrp(fd);
- if (!CHOOSE_MODE_PROC(is_tracer_winch, is_skas_winch, pid, fd, tty) &&
- (pid == -1)) {
+ if (!is_skas_winch(pid, fd, tty) && (pid == -1)) {
thread = winch_tramp(fd, tty, &thread_fd, &stack);
if (thread < 0)
return;
register_winch_irq(thread_fd, fd, thread, tty, stack);
- count = os_write_file(thread_fd, &c, sizeof(c));
- if(count != sizeof(c))
- printk("register_winch : failed to write "
- "synchronization byte, err = %d\n", -count);
+ count = write(thread_fd, &c, sizeof(c));
+ if (count != sizeof(c))
+ printk(UM_KERN_ERR "register_winch : failed to write "
+ "synchronization byte, err = %d\n", errno);
}
}
projects / linux-2.6-omap-h63xx.git / blobdiff