#include <stdio.h>
-#include <fcntl.h>
-#include <unistd.h>
-#include <limits.h>
-#include "syscall.h"
+#include <string.h>
char *ctermid(char *s)
{
- static char s2[L_ctermid];
- int fd;
- if (!s) s = s2;
- *s = 0;
- fd = open("/dev/tty", O_WRONLY | O_NOCTTY | O_CLOEXEC);
- if (fd >= 0) {
- ttyname_r(fd, s, L_ctermid);
- __syscall(SYS_close, fd);
- }
- return s;
+ return s ? strcpy(s, "/dev/tty") : "/dev/tty";
}