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authorLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 15:20:36 -0700
committerLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 15:20:36 -0700
commit1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch)
tree0bba044c4ce775e45a88a51686b5d9f90697ea9d /arch/um/os-Linux/tty.c
downloadblackbird-op-linux-1da177e4c3f41524e886b7f1b8a0c1fc7321cac2.tar.gz
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Linux-2.6.12-rc2v2.6.12-rc2
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
Diffstat (limited to 'arch/um/os-Linux/tty.c')
-rw-r--r--arch/um/os-Linux/tty.c61
1 files changed, 61 insertions, 0 deletions
diff --git a/arch/um/os-Linux/tty.c b/arch/um/os-Linux/tty.c
new file mode 100644
index 000000000000..4cfdd18ea1ef
--- /dev/null
+++ b/arch/um/os-Linux/tty.c
@@ -0,0 +1,61 @@
+/*
+ * Copyright (C) 2002 Jeff Dike (jdike@karaya.com)
+ * Licensed under the GPL
+ */
+
+#include <stdlib.h>
+#include <errno.h>
+#include "os.h"
+#include "user.h"
+#include "kern_util.h"
+
+struct grantpt_info {
+ int fd;
+ int res;
+ int err;
+};
+
+static void grantpt_cb(void *arg)
+{
+ struct grantpt_info *info = arg;
+
+ info->res = grantpt(info->fd);
+ info->err = errno;
+}
+
+int get_pty(void)
+{
+ struct grantpt_info info;
+ int fd;
+
+ fd = os_open_file("/dev/ptmx", of_rdwr(OPENFLAGS()), 0);
+ if(fd < 0){
+ printk("get_pty : Couldn't open /dev/ptmx - err = %d\n", -fd);
+ return(fd);
+ }
+
+ info.fd = fd;
+ initial_thread_cb(grantpt_cb, &info);
+
+ if(info.res < 0){
+ printk("get_pty : Couldn't grant pty - errno = %d\n",
+ -info.err);
+ return(-1);
+ }
+ if(unlockpt(fd) < 0){
+ printk("get_pty : Couldn't unlock pty - errno = %d\n", errno);
+ return(-1);
+ }
+ return(fd);
+}
+
+/*
+ * Overrides for Emacs so that we follow Linus's tabbing style.
+ * Emacs will notice this stuff at the end of the file and automatically
+ * adjust the settings for this buffer only. This must remain at the end
+ * of the file.
+ * ---------------------------------------------------------------------------
+ * Local variables:
+ * c-file-style: "linux"
+ * End:
+ */
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