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author | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 15:20:36 -0700 |
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committer | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 15:20:36 -0700 |
commit | 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch) | |
tree | 0bba044c4ce775e45a88a51686b5d9f90697ea9d /arch/um/os-Linux/tty.c | |
download | blackbird-op-linux-1da177e4c3f41524e886b7f1b8a0c1fc7321cac2.tar.gz blackbird-op-linux-1da177e4c3f41524e886b7f1b8a0c1fc7321cac2.zip |
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.c | 61 |
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: + */ |