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author | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 22:20:36 (GMT) |
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committer | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 22:20:36 (GMT) |
commit | 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch) | |
tree | 0bba044c4ce775e45a88a51686b5d9f90697ea9d /arch/um/drivers/fd.c | |
download | linux-1da177e4c3f41524e886b7f1b8a0c1fc7321cac2.tar.xz |
Linux-2.6.12-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/drivers/fd.c')
-rw-r--r-- | arch/um/drivers/fd.c | 108 |
1 files changed, 108 insertions, 0 deletions
diff --git a/arch/um/drivers/fd.c b/arch/um/drivers/fd.c new file mode 100644 index 0000000..f0b888f --- /dev/null +++ b/arch/um/drivers/fd.c @@ -0,0 +1,108 @@ +/* + * Copyright (C) 2001 Jeff Dike (jdike@karaya.com) + * Licensed under the GPL + */ + +#include <stdio.h> +#include <stdlib.h> +#include <unistd.h> +#include <termios.h> +#include <errno.h> +#include "user.h" +#include "user_util.h" +#include "chan_user.h" + +struct fd_chan { + int fd; + int raw; + struct termios tt; + char str[sizeof("1234567890\0")]; +}; + +static void *fd_init(char *str, int device, struct chan_opts *opts) +{ + struct fd_chan *data; + char *end; + int n; + + if(*str != ':'){ + printk("fd_init : channel type 'fd' must specify a file " + "descriptor\n"); + return(NULL); + } + str++; + n = strtoul(str, &end, 0); + if((*end != '\0') || (end == str)){ + printk("fd_init : couldn't parse file descriptor '%s'\n", str); + return(NULL); + } + data = um_kmalloc(sizeof(*data)); + if(data == NULL) return(NULL); + *data = ((struct fd_chan) { .fd = n, + .raw = opts->raw }); + return(data); +} + +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)){ + 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); +} + +static void fd_close(int fd, void *d) +{ + struct fd_chan *data = d; + int err; + + if(data->raw && isatty(fd)){ + CATCH_EINTR(err = tcsetattr(fd, TCSAFLUSH, &data->tt)); + if(err) + printk("Failed to restore terminal state - " + "errno = %d\n", -err); + data->raw = 0; + } +} + +static 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 = { + .type = "fd", + .init = fd_init, + .open = fd_open, + .close = fd_close, + .read = generic_read, + .write = generic_write, + .console_write = fd_console_write, + .window_size = generic_window_size, + .free = generic_free, + .winch = 1, +}; + +/* + * 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: + */ |