1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
|
/* $Id: xio-pty.c,v 1.9 2004/06/06 17:33:22 gerhard Exp $ */
/* Copyright Gerhard Rieger 2002-2004 */
/* Published under the GNU General Public License V.2, see file COPYING */
/* this file contains the source for creating pty addresses */
#include "xiosysincludes.h"
#include "xioopen.h"
#include "xio-named.h"
#include "xio-termios.h"
#if WITH_PTY
#define MAXPTYNAMELEN 64
static int xioopen_pty(char *a1, int rw, xiofile_t *fd, unsigned groups, int dummy1, int dummy2, void *dummyp1);
const struct addrdesc addr_pty = { "pty", 3, xioopen_pty, GROUP_NAMED|GROUP_FD|GROUP_TERMIOS|GROUP_PTY, 0, 0, NULL HELP("") };
const struct optdesc opt_symbolic_link = { "symbolic-link", "link", OPT_SYMBOLIC_LINK, GROUP_PTY, PH_LATE, TYPE_FILENAME, OFUNC_SPEC, 0, 0 };
static int xioopen_pty(char *a1, int rw, xiofile_t *xfd, unsigned groups, int dummy1, int dummy2, void *dummyp1) {
/* we expect the form: filename */
struct opt *opts = NULL;
int ptyfd = -1, ttyfd = -1;
#if defined(HAVE_DEV_PTMX) || defined(HAVE_DEV_PTC)
bool useptmx = false; /* use /dev/ptmx or equivalent */
#endif
#if HAVE_OPENPTY
bool useopenpty = false; /* try only openpty */
#endif /* HAVE_OPENPTY */
char ptyname[MAXPTYNAMELEN];
char *linkname = NULL;
if (parseopts(a1, groups, &opts) < 0)
return STAT_NORETRY;
applyopts(-1, opts, PH_INIT);
/* trying to set user-early, perm-early etc. here might be useless because
file system entry is eventually available only past pty creation */
/* name not yet known; umask should not be handled with this function! */
/* umask does not affect resulting mode, on Linux 2.4 */
applyopts_named("", opts, PH_EARLY); /* umask! */
applyopts2(-1, opts, PH_INIT, PH_EARLY);
#if defined(HAVE_DEV_PTMX) || defined(HAVE_DEV_PTC)
retropt_bool(opts, OPT_PTMX, &useptmx);
#endif
#if HAVE_OPENPTY
retropt_bool(opts, OPT_OPENPTY, &useopenpty);
#elif defined(HAVE_DEV_PTMX) || defined(HAVE_DEV_PTC)
useptmx = true;
#endif
#if HAVE_OPENPTY && (defined(HAVE_DEV_PTMX) || defined(HAVE_DEV_PTC))
if (useptmx)
useopenpty = false;
#endif
applyopts(-1, opts, PH_PREBIGEN);
#if defined(HAVE_DEV_PTMX)
# define PTMX "/dev/ptmx" /* Linux */
#elif HAVE_DEV_PTC
# define PTMX "/dev/ptc" /* AIX 4.3.3 */
#endif
#if HAVE_DEV_PTMX || HAVE_DEV_PTC
if (useptmx) {
if ((ptyfd = Open(PTMX, O_RDWR|O_NOCTTY, 0620)) < 0) {
Warn1("open(\""PTMX"\", O_RDWR|O_NOCTTY, 0620): %s",
strerror(errno));
/*!*/
} else {
;/*0 Info1("open(\""PTMX"\", O_RDWR|O_NOCTTY, 0620) -> %d", ptyfd);*/
}
if (ptyfd >= 0 && ttyfd < 0) {
char *tn = NULL;
/* we used PTMX before forking */
extern char *ptsname(int);
#if HAVE_GRANTPT /* AIX, not Linux */
if (Grantpt(ptyfd)/*!*/ < 0) {
Warn2("grantpt(%d): %s", ptyfd, strerror(errno));
}
#endif /* HAVE_GRANTPT */
#if HAVE_UNLOCKPT
if (Unlockpt(ptyfd)/*!*/ < 0) {
Warn2("unlockpt(%d): %s", ptyfd, strerror(errno));
}
#endif /* HAVE_UNLOCKPT */
#if HAVE_PTSNAME /* AIX, not Linux */
if ((tn = Ptsname(ptyfd)) == NULL) {
Warn2("ptsname(%d): %s", ptyfd, strerror(errno));
} else {
Notice1("PTY is %s", tn);
}
#endif /* HAVE_PTSNAME */
if (tn == NULL) {
if ((tn = Ttyname(ptyfd)) == NULL) {
Warn2("ttyname(%d): %s", ptyfd, strerror(errno));
}
}
strncpy(ptyname, tn, MAXPTYNAMELEN);
}
}
#endif /* HAVE_DEV_PTMX || HAVE_DEV_PTC */
#if HAVE_OPENPTY
if (ptyfd < 0) {
int result;
if ((result = Openpty(&ptyfd, &ttyfd, ptyname, NULL, NULL)) < 0) {
Error4("openpty(%p, %p, %p, NULL, NULL): %s",
&ptyfd, &ttyfd, ptyname, strerror(errno));
return -1;
}
Notice1("PTY is %s", ptyname);
}
#endif /* HAVE_OPENPTY */
applyopts_named(ptyname, opts, PH_PASTOPEN);
applyopts_named(ptyname, opts, PH_FD);
applyopts_cloexec(ptyfd, opts);/*!*/
xfd->stream.dtype = DATA_PTY;
xfd->stream.howtoend = END_CLOSE;
applyopts(ptyfd, opts, PH_FD);
if (!retropt_string(opts, OPT_SYMBOLIC_LINK, &linkname)) {
if (Unlink(linkname) < 0 && errno != ENOENT) {
Error2("unlink(\"%s\"): %s", linkname, strerror(errno));
}
if (Symlink(ptyname, linkname) < 0) {
Error3("symlink(\"%s\", \"%s\"): %s",
ptyname, linkname, strerror(errno));
}
}
applyopts(ptyfd, opts, PH_LATE);
applyopts_single(&xfd->stream, opts, PH_LATE);
xfd->stream.fd = ptyfd;
return STAT_OK;
}
#endif /* WITH_PTY */
|