Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * Copyright (C) 2001, 2002 Jeff Dike (jdike@karaya.com) | |
3 | * Licensed under the GPL | |
4 | */ | |
5 | ||
6 | #include <stdio.h> | |
7 | #include <unistd.h> | |
8 | #include <string.h> | |
9 | #include <errno.h> | |
10 | #include <termios.h> | |
11 | #include "chan_user.h" | |
12 | #include "user.h" | |
13 | #include "user_util.h" | |
14 | #include "kern_util.h" | |
15 | #include "os.h" | |
16 | ||
17 | struct pty_chan { | |
18 | void (*announce)(char *dev_name, int dev); | |
19 | int dev; | |
20 | int raw; | |
21 | struct termios tt; | |
22 | char dev_name[sizeof("/dev/pts/0123456\0")]; | |
23 | }; | |
24 | ||
25 | static void *pty_chan_init(char *str, int device, struct chan_opts *opts) | |
26 | { | |
27 | struct pty_chan *data; | |
28 | ||
29 | data = um_kmalloc(sizeof(*data)); | |
30 | if(data == NULL) return(NULL); | |
31 | *data = ((struct pty_chan) { .announce = opts->announce, | |
32 | .dev = device, | |
33 | .raw = opts->raw }); | |
34 | return(data); | |
35 | } | |
36 | ||
37 | static int pts_open(int input, int output, int primary, void *d, | |
38 | char **dev_out) | |
39 | { | |
40 | struct pty_chan *data = d; | |
41 | char *dev; | |
42 | int fd, err; | |
43 | ||
44 | fd = get_pty(); | |
45 | if(fd < 0){ | |
46 | printk("open_pts : Failed to open pts\n"); | |
47 | return(-errno); | |
48 | } | |
49 | if(data->raw){ | |
50 | CATCH_EINTR(err = tcgetattr(fd, &data->tt)); | |
51 | if(err) | |
52 | return(err); | |
53 | ||
54 | err = raw(fd); | |
55 | if(err) | |
56 | return(err); | |
57 | } | |
58 | ||
59 | dev = ptsname(fd); | |
60 | sprintf(data->dev_name, "%s", dev); | |
61 | *dev_out = data->dev_name; | |
62 | if (data->announce) | |
63 | (*data->announce)(dev, data->dev); | |
64 | return(fd); | |
65 | } | |
66 | ||
67 | static int getmaster(char *line) | |
68 | { | |
69 | char *pty, *bank, *cp; | |
70 | int master, err; | |
71 | ||
72 | pty = &line[strlen("/dev/ptyp")]; | |
73 | for (bank = "pqrs"; *bank; bank++) { | |
74 | line[strlen("/dev/pty")] = *bank; | |
75 | *pty = '0'; | |
76 | if (os_stat_file(line, NULL) < 0) | |
77 | break; | |
78 | for (cp = "0123456789abcdef"; *cp; cp++) { | |
79 | *pty = *cp; | |
80 | master = os_open_file(line, of_rdwr(OPENFLAGS()), 0); | |
81 | if (master >= 0) { | |
82 | char *tp = &line[strlen("/dev/")]; | |
83 | ||
84 | /* verify slave side is usable */ | |
85 | *tp = 't'; | |
86 | err = os_access(line, OS_ACC_RW_OK); | |
87 | *tp = 'p'; | |
88 | if(err == 0) return(master); | |
89 | (void) os_close_file(master); | |
90 | } | |
91 | } | |
92 | } | |
93 | return(-1); | |
94 | } | |
95 | ||
96 | static int pty_open(int input, int output, int primary, void *d, | |
97 | char **dev_out) | |
98 | { | |
99 | struct pty_chan *data = d; | |
100 | int fd, err; | |
101 | char dev[sizeof("/dev/ptyxx\0")] = "/dev/ptyxx"; | |
102 | ||
103 | fd = getmaster(dev); | |
104 | if(fd < 0) | |
105 | return(-errno); | |
106 | ||
107 | if(data->raw){ | |
108 | err = raw(fd); | |
109 | if(err) | |
110 | return(err); | |
111 | } | |
112 | ||
113 | if(data->announce) (*data->announce)(dev, data->dev); | |
114 | ||
115 | sprintf(data->dev_name, "%s", dev); | |
116 | *dev_out = data->dev_name; | |
117 | return(fd); | |
118 | } | |
119 | ||
120 | static int pty_console_write(int fd, const char *buf, int n, void *d) | |
121 | { | |
122 | struct pty_chan *data = d; | |
123 | ||
124 | return(generic_console_write(fd, buf, n, &data->tt)); | |
125 | } | |
126 | ||
127 | struct chan_ops pty_ops = { | |
128 | .type = "pty", | |
129 | .init = pty_chan_init, | |
130 | .open = pty_open, | |
131 | .close = generic_close, | |
132 | .read = generic_read, | |
133 | .write = generic_write, | |
134 | .console_write = pty_console_write, | |
135 | .window_size = generic_window_size, | |
136 | .free = generic_free, | |
137 | .winch = 0, | |
138 | }; | |
139 | ||
140 | struct chan_ops pts_ops = { | |
141 | .type = "pts", | |
142 | .init = pty_chan_init, | |
143 | .open = pts_open, | |
144 | .close = generic_close, | |
145 | .read = generic_read, | |
146 | .write = generic_write, | |
147 | .console_write = pty_console_write, | |
148 | .window_size = generic_window_size, | |
149 | .free = generic_free, | |
150 | .winch = 0, | |
151 | }; | |
152 | ||
153 | /* | |
154 | * Overrides for Emacs so that we follow Linus's tabbing style. | |
155 | * Emacs will notice this stuff at the end of the file and automatically | |
156 | * adjust the settings for this buffer only. This must remain at the end | |
157 | * of the file. | |
158 | * --------------------------------------------------------------------------- | |
159 | * Local variables: | |
160 | * c-file-style: "linux" | |
161 | * End: | |
162 | */ |