Annotation of embedaddon/tmux/pty.c, revision 1.1.1.1
1.1 misho 1: /* $OpenBSD$ */
2:
3: /*
4: * Copyright (c) 2017 Nicholas Marriott <nicholas.marriott@gmail.com>
5: *
6: * Permission to use, copy, modify, and distribute this software for any
7: * purpose with or without fee is hereby granted, provided that the above
8: * copyright notice and this permission notice appear in all copies.
9: *
10: * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
11: * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
12: * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
13: * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
14: * WHATSOEVER RESULTING FROM LOSS OF MIND, USE, DATA OR PROFITS, WHETHER
15: * IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
16: * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
17: */
18:
19: #include <sys/types.h>
20: #include <sys/ioctl.h>
21: #include <sys/time.h>
22: #ifdef __OpenBSD__
23: #include <sys/tty.h>
24: #endif
25:
26: #include <fcntl.h>
27: #include <string.h>
28: #include <termios.h>
29: #include <unistd.h>
30:
31: #include "compat.h"
32:
33: int pty_open(int *);
34: pid_t pty_fork(int, int *, char *, size_t, struct winsize *);
35:
36: #ifdef __OpenBSD__
37: int
38: pty_open(int *fd)
39: {
40: *fd = open(PATH_PTMDEV, O_RDWR|O_CLOEXEC);
41: if (*fd < 0)
42: return (-1);
43: return (0);
44: }
45: #else
46: int
47: pty_open(__unused int *fd)
48: {
49: *fd = -1;
50: return (0);
51: }
52: #endif
53:
54: #ifdef __OpenBSD__
55: pid_t
56: pty_fork(int ptmfd, int *fd, char *name, size_t namelen, struct winsize *ws)
57: {
58: struct ptmget ptm;
59: pid_t pid;
60:
61: if (ioctl(ptmfd, PTMGET, &ptm) == -1)
62: return (-1);
63:
64: strlcpy(name, ptm.sn, namelen);
65: ioctl(ptm.sfd, TIOCSWINSZ, ws);
66:
67: switch (pid = fork()) {
68: case -1:
69: close(ptm.cfd);
70: close(ptm.sfd);
71: return (-1);
72: case 0:
73: close(ptm.cfd);
74: login_tty(ptm.sfd);
75: return (0);
76: }
77: *fd = ptm.cfd;
78: close(ptm.sfd);
79: return (pid);
80: }
81: #else
82: pid_t
83: pty_fork(__unused int ptmfd, int *fd, char *name, __unused size_t namelen,
84: struct winsize *ws)
85: {
86: return (forkpty(fd, name, NULL, ws));
87: }
88: #endif
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