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60 * @(#)tty_pty.c 8.4 (Berkeley) 2/20/95
64 * Pseudo-teletype Driver
65 * (Actually two drivers, requiring two entries in 'cdevsw')
67 #include "pty.h" /* XXX */
69 #include <sys/param.h>
70 #include <sys/systm.h>
71 #include <sys/ioctl.h>
72 #include <sys/proc_internal.h>
73 #include <sys/kauth.h>
76 #include <sys/file_internal.h>
77 #include <sys/uio_internal.h>
78 #include <sys/kernel.h>
79 #include <sys/vnode.h>
81 #include <sys/signalvar.h>
84 #include <security/mac_framework.h>
91 #define NPTY 32 /* crude XXX */
92 #warning You have only one pty defined, redefining to 32.
96 * pts == /dev/tty[pqrsPQRS][0-9a-v]
97 * ptc == /dev/pty[pqrsPQRS][0-9a-v]
99 static struct ptmx_ioctl pt_ioctl
[NPTY
];
101 int pty_init(int n_ptys
);
105 pty_init(__unused
int n_ptys
)
110 #include <miscfs/devfs/devfs.h>
111 #define START_CHAR 'p'
114 static struct tty_dev_t _pty_driver
;
116 static struct ptmx_ioctl
*
117 pty_get_ioctl(int minor
, int open_flag
)
122 struct ptmx_ioctl
*pti
= &pt_ioctl
[minor
];
123 if (open_flag
& (PF_OPEN_M
| PF_OPEN_S
)) {
125 pti
->pt_tty
= ttymalloc();
135 pty_get_name(int minor
, char *buffer
, size_t size
)
137 return snprintf(buffer
, size
, "/dev/tty%c%x",
138 START_CHAR
+ (minor
/ HEX_BASE
),
148 n_ptys
= min(n_ptys
, NPTY
); /* clamp to avoid pt_ioctl overflow */
150 /* create the pseudo tty device nodes */
151 for (j
= 0; j
< 10; j
++) {
152 for (i
= 0; i
< HEX_BASE
; i
++) {
153 int m
= j
* HEX_BASE
+ i
;
157 pt_ioctl
[m
].pt_devhandle
= devfs_make_node(makedev(PTS_MAJOR
, m
),
158 DEVFS_CHAR
, UID_ROOT
, GID_WHEEL
, 0666,
159 "tty%c%x", j
+ START_CHAR
, i
);
160 (void)devfs_make_node(makedev(PTC_MAJOR
, m
),
161 DEVFS_CHAR
, UID_ROOT
, GID_WHEEL
, 0666,
162 "pty%c%x", j
+ START_CHAR
, i
);
167 _pty_driver
.master
= PTC_MAJOR
;
168 _pty_driver
.slave
= PTS_MAJOR
;
169 _pty_driver
.open_reset
= 1;
170 _pty_driver
.open
= &pty_get_ioctl
;
171 _pty_driver
.name
= &pty_get_name
;
172 tty_dev_register(&_pty_driver
);
174 if (cdevsw_setkqueueok(PTC_MAJOR
, &cdevsw
[PTC_MAJOR
], CDEVSW_IS_PTC
) == -1) {
175 panic("Can't mark ptc as kqueue ok");
177 if (cdevsw_setkqueueok(PTS_MAJOR
, &cdevsw
[PTS_MAJOR
], CDEVSW_IS_PTS
) == -1) {
178 panic("Can't mark pts as kqueue ok");