/* * Copyright (C) 2001, 2002 Jeff Dike (jdike@karaya.com) * Licensed under the GPL */ #include <stdio.h> #include <stdlib.h> #include <unistd.h> #include <string.h> #include <errno.h> #include <termios.h> #include "chan_user.h" #include "user.h" #include "kern_util.h" #include "os.h" #include "um_malloc.h" struct pty_chan { void (*announce)(char *dev_name, int dev); int dev; int raw; struct termios tt; char dev_name[sizeof("/dev/pts/0123456\0")]; }; static void *pty_chan_init(char *str, int device, const struct chan_opts *opts) { struct pty_chan *data; data = um_kmalloc(sizeof(*data)); if(data == NULL) return(NULL); *data = ((struct pty_chan) { .announce = opts->announce, .dev = device, .raw = opts->raw }); return(data); } static int pts_open(int input, int output, int primary, void *d, char **dev_out) { struct pty_chan *data = d; char *dev; int fd, err; fd = get_pty(); if(fd < 0){ err = -errno; printk("open_pts : Failed to open pts\n"); return err; } if(data->raw){ CATCH_EINTR(err = tcgetattr(fd, &data->tt)); if(err) return(err); err = raw(fd); if(err) return(err); } dev = ptsname(fd); sprintf(data->dev_name, "%s", dev); *dev_out = data->dev_name; if (data->announce) (*data->announce)(dev, data->dev); return(fd); } static int getmaster(char *line) { char *pty, *bank, *cp; int master, err; pty = &line[strlen("/dev/ptyp")]; for (bank = "pqrs"; *bank; bank++) { line[strlen("/dev/pty")] = *bank; *pty = '0'; if (os_stat_file(line, NULL) < 0) break; for (cp = "0123456789abcdef"; *cp; cp++) { *pty = *cp; master = os_open_file(line, of_rdwr(OPENFLAGS()), 0); if (master >= 0) { char *tp = &line[strlen("/dev/")]; /* verify slave side is usable */ *tp = 't'; err = os_access(line, OS_ACC_RW_OK); *tp = 'p'; if(err == 0) return(master); (void) os_close_file(master); } } } return(-1); } static int pty_open(int input, int output, int primary, void *d, char **dev_out) { struct pty_chan *data = d; int fd, err; char dev[sizeof("/dev/ptyxx\0")] = "/dev/ptyxx"; fd = getmaster(dev); if(fd < 0) return(-errno); if(data->raw){ err = raw(fd); if(err) return(err); } if(data->announce) (*data->announce)(dev, data->dev); sprintf(data->dev_name, "%s", dev); *dev_out = data->dev_name; return(fd); } const struct chan_ops pty_ops = { .type = "pty", .init = pty_chan_init, .open = pty_open, .close = generic_close, .read = generic_read, .write = generic_write, .console_write = generic_console_write, .window_size = generic_window_size, .free = generic_free, .winch = 0, }; const struct chan_ops pts_ops = { .type = "pts", .init = pty_chan_init, .open = pts_open, .close = generic_close, .read = generic_read, .write = generic_write, .console_write = generic_console_write, .window_size = generic_window_size, .free = generic_free, .winch = 0, }; /* * 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: */