#include <stdlib.h>
#include <unistd.h>
#include <termios.h>
+#include <errno.h>
#include "user.h"
#include "user_util.h"
#include "chan_user.h"
+#include "os.h"
+#include "um_malloc.h"
struct fd_chan {
int fd;
char str[sizeof("1234567890\0")];
};
-void *fd_init(char *str, int device, struct chan_opts *opts)
+static void *fd_init(char *str, int device, const struct chan_opts *opts)
{
struct fd_chan *data;
char *end;
printk("fd_init : couldn't parse file descriptor '%s'\n", str);
return(NULL);
}
- if((data = um_kmalloc(sizeof(*data))) == NULL) return(NULL);
+ data = um_kmalloc(sizeof(*data));
+ if(data == NULL) return(NULL);
*data = ((struct fd_chan) { .fd = n,
.raw = opts->raw });
return(data);
}
-int fd_open(int input, int output, int primary, void *d, char **dev_out)
+static int fd_open(int input, int output, int primary, void *d, char **dev_out)
{
struct fd_chan *data = d;
+ int err;
if(data->raw && isatty(data->fd)){
- tcgetattr(data->fd, &data->tt);
- raw(data->fd, 0);
+ CATCH_EINTR(err = tcgetattr(data->fd, &data->tt));
+ if(err)
+ return(err);
+
+ err = raw(data->fd);
+ if(err)
+ return(err);
}
sprintf(data->str, "%d", data->fd);
*dev_out = data->str;
return(data->fd);
}
-void fd_close(int fd, void *d)
+static void fd_close(int fd, void *d)
{
struct fd_chan *data = d;
+ int err;
if(data->raw && isatty(fd)){
- tcsetattr(fd, TCSAFLUSH, &data->tt);
+ CATCH_EINTR(err = tcsetattr(fd, TCSAFLUSH, &data->tt));
+ if(err)
+ printk("Failed to restore terminal state - "
+ "errno = %d\n", -err);
data->raw = 0;
}
}
-int fd_console_write(int fd, const char *buf, int n, void *d)
-{
- struct fd_chan *data = d;
-
- return(generic_console_write(fd, buf, n, &data->tt));
-}
-
-struct chan_ops fd_ops = {
+const struct chan_ops fd_ops = {
.type = "fd",
.init = fd_init,
.open = fd_open,
.close = fd_close,
.read = generic_read,
.write = generic_write,
- .console_write = fd_console_write,
+ .console_write = generic_console_write,
.window_size = generic_window_size,
.free = generic_free,
.winch = 1,