int
allocatePty(int *pty_return, char **line_return)
{
char name[12], *line = NULL;
int pty = -1;
const char *name1 = "pqrstuvwxyzPQRST";
char buffer[80];
char *name2 = strcpy(buffer, "0123456789abcdefghijklmnopqrstuv");
const char *p1;
char *p2;
#if defined(HAVE_GRANTPT)
int rc;
#ifdef HAVE_POSIX_OPENPT
pty = posix_openpt(O_RDWR);
#else
pty = open("/dev/ptmx", O_RDWR);
#endif
if (pty < 0)
goto bsd;
rc = grantpt(pty);
if (rc < 0) {
close(pty);
goto bsd;
}
rc = unlockpt(pty);
if (rc < 0) {
close(pty);
goto bsd;
}
line = strmalloc(ptsname(pty));
if (!line) {
close(pty);
goto bsd;
}
*pty_return = pty;
*line_return = line;
return 0;
bsd:
#elif defined(HAVE_OPENPTY)
int rc;
char ttydev[80]; /* OpenBSD says at least 16 bytes */
rc = openpty(&pty, &opened_tty, ttydev, NULL, NULL);
if (rc < 0) {
close(pty);
goto bsd;
}
line = strmalloc(ttydev);
if (!line) {
close(pty);
goto bsd;
}
*pty_return = pty;
*line_return = line;
return 0;
bsd:
#endif /* HAVE_GRANTPT, etc */
strcpy(name, "/dev/pty??");
for (p1 = name1; *p1; p1++) {
name[8] = *p1;
for (p2 = name2; *p2; p2++) {
name[9] = *p2;
pty = open(name, O_RDWR);
if (pty >= 0)
goto found;
/* Systems derived from 4.4BSD differ in their pty names,
so ENOENT doesn't necessarily imply we're done. */
continue;
}
}
goto bail;
found:
if ((line = strmalloc(name)) != 0) {
line[5] = 't';
fix_pty_perms(line);
*pty_return = pty;
*line_return = line;
return 0;
}
bail:
if (pty >= 0)
close(pty);
if (line)
free(line);
return -1;
}
int
allocatePty(int *pty_return, char **line_return)
{
char name[12], *line = NULL;
int pty = -1;
char *name1 = "pqrstuvwxyzPQRST",
*name2 = "0123456789abcdefghijklmnopqrstuv";
char *p1, *p2;
#ifdef HAVE_GRANTPT
char *temp_line;
int rc;
pty = open("/dev/ptmx", O_RDWR);
if(pty < 0)
goto bsd;
rc = grantpt(pty);
if(rc < 0) {
close(pty);
goto bsd;
}
rc = unlockpt(pty);
if(rc < 0) {
close(pty);
goto bsd;
}
temp_line = ptsname(pty);
if(!temp_line) {
close(pty);
goto bsd;
}
line = strdup(temp_line);
if(!line) {
close(pty);
return -1;
}
fix_pty_perms(line);
*pty_return = pty;
*line_return = line;
return 0;
#endif /* HAVE_GRANTPT */
#ifdef HAVE_OPENPTY
if(openpty(pty_return, &opened_tty, NULL, NULL, NULL) < 0)
return -1;
*line_return = NULL; /* unused, but free()ed */
return 0;
#endif /* HAVE_OPENPTY */
bsd:
strcpy(name, "/dev/pty??");
for(p1 = name1; *p1; p1++) {
name[8] = *p1;
for(p2 = name2; *p2; p2++) {
name[9] = *p2;
pty = open(name, O_RDWR);
if(pty >= 0)
goto found;
/* Systems derived from 4.4BSD differ in their pty names,
so ENOENT doesn't necessarily imply we're done. */
continue;
}
}
goto bail;
found:
line = strdup(name);
if(!line)
goto bail;
line[5] = 't';
fix_pty_perms(line);
*pty_return = pty;
*line_return = line;
return 0;
bail:
if(pty >= 0)
close(pty);
if(line)
free(line);
return -1;
}