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 tarball for details.
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 #if 0 /* if ptsname_r is not available... */
24 name = ptsname(p); /* find out the name of slave pty */
26 bb_perror_msg_and_die("ptsname error (is /dev/pts mounted?)");
28 safe_strncpy(line, name, GETPTY_BUFSIZE);
30 /* find out the name of slave pty */
31 if (ptsname_r(p, line, GETPTY_BUFSIZE-1) != 0) {
32 bb_perror_msg_and_die("ptsname error (is /dev/pts mounted?)");
34 line[GETPTY_BUFSIZE-1] = '\0';
43 strcpy(line, "/dev/ptyXX");
45 for (i = 0; i < 16; i++) {
46 line[8] = "pqrstuvwxyzabcde"[i];
48 if (stat(line, &stb) < 0) {
51 for (j = 0; j < 16; j++) {
52 line[9] = j < 10 ? j + '0' : j - 10 + 'a';
54 fprintf(stderr, "Trying to open device: %s\n", line);
55 p = open(line, O_RDWR | O_NOCTTY);
62 #endif /* FEATURE_DEVPTS */
63 bb_error_msg_and_die("can't find free pty");