1 /* vi: set sw=4 ts=4: */
3 * Mini getpty implementation for busybox
4 * Bjorn Wesen, Axis Communications AB (bjornw@axis.com)
6 * Licensed under GPLv2 or later, see file LICENSE in this source tree.
13 int FAST_FUNC
xgetpty(char *line
)
17 #if ENABLE_FEATURE_DEVPTS
18 p
= open("/dev/ptmx", O_RDWR
);
20 grantpt(p
); /* chmod+chown corresponding slave pty */
21 unlockpt(p
); /* (what does this do?) */
22 # ifndef HAVE_PTSNAME_R
25 name
= ptsname(p
); /* find out the name of slave pty */
27 bb_perror_msg_and_die("ptsname error (is /dev/pts mounted?)");
29 safe_strncpy(line
, name
, GETPTY_BUFSIZE
);
32 /* find out the name of slave pty */
33 if (ptsname_r(p
, line
, GETPTY_BUFSIZE
-1) != 0) {
34 bb_perror_msg_and_die("ptsname error (is /dev/pts mounted?)");
36 line
[GETPTY_BUFSIZE
-1] = '\0';
45 strcpy(line
, "/dev/ptyXX");
47 for (i
= 0; i
< 16; i
++) {
48 line
[8] = "pqrstuvwxyzabcde"[i
];
50 if (stat(line
, &stb
) < 0) {
53 for (j
= 0; j
< 16; j
++) {
54 line
[9] = j
< 10 ? j
+ '0' : j
- 10 + 'a';
56 fprintf(stderr
, "Trying to open device: %s\n", line
);
57 p
= open(line
, O_RDWR
| O_NOCTTY
);
64 #endif /* FEATURE_DEVPTS */
65 bb_error_msg_and_die("can't find free pty");