char *
_ttyname_dev (dev_t rdev, char *buffer, size_t buflen)
{
struct stat64 st;
int dostat = 0;
char *name;
int save = errno;
if (__xstat64 (_STAT_VER, "/dev/pts", &st) == 0 && S_ISDIR (st.st_mode))
{
dostat = 1;
name = getttyname ("/dev/pts", rdev, -1, save, &dostat);
}
else
{
__set_errno (save);
name = NULL;
}
if (!name && dostat != -1)
{
dostat = 1;
name = getttyname ("/dev", rdev, -1, save, &dostat);
}
return name;
}
/* Return the pathname of the terminal FD is open on, or NULL on errors.
The returned storage is good only until the next call to this function. */
char *
ttyname (int fd)
{
struct stat st;
int dostat = 0;
char *name;
int save = errno;
if (!__isatty (fd))
return NULL;
if (fstat (fd, &st) < 0)
return NULL;
#ifdef _STATBUF_ST_RDEV
name = getttyname (fd, st.st_rdev, st.st_ino, save, &dostat);
#else
name = getttyname (fd, st.st_dev, st.st_ino, save, &dostat);
#endif
if (!name && dostat != -1)
{
dostat = 1;
#ifdef _STATBUF_ST_RDEV
name = getttyname (fd, st.st_rdev, st.st_ino, save, &dostat);
#else
name = getttyname (fd, st.st_dev, st.st_ino, save, &dostat);
#endif
}
return name;
}
/* Return the pathname of the terminal FD is open on, or NULL on errors.
The returned storage is good only until the next call to this function. */
char *
ttyname (int fd)
{
struct stat64 st;
char *name;
int save = errno;
if (!__isatty (fd))
return NULL;
if (__fxstat64 (_STAT_VER, fd, &st) < 0)
return NULL;
name = getttyname ("/dev/pty/slv", st.st_dev, st.st_ino, save);
if (!name)
{
name = getttyname ("/dev/pty/mst", st.st_dev, st.st_ino, save);
}
return name;
}
/* Return the pathname of the terminal FD is open on, or NULL on errors.
The returned storage is good only until the next call to this function. */
char *
ttyname (int fd)
{
struct stat64 st, st1;
int dostat = 0;
char *name;
int save = errno;
struct termios term;
/* isatty check, tcgetattr is used because it sets the correct
errno (EBADF resp. ENOTTY) on error. */
if (__builtin_expect (__tcgetattr (fd, &term) < 0, 0))
return NULL;
if (__fxstat64 (_STAT_VER, fd, &st) < 0)
return NULL;
if (__xstat64 (_STAT_VER, "/dev/pts", &st1) == 0 && S_ISDIR (st1.st_mode))
{
#ifdef _STATBUF_ST_RDEV
name = getttyname ("/dev/pts", st.st_rdev, st.st_ino, save, &dostat);
#else
name = getttyname ("/dev/pts", st.st_dev, st.st_ino, save, &dostat);
#endif
}
else
{
__set_errno (save);
name = NULL;
}
if (!name && dostat != -1)
{
#ifdef _STATBUF_ST_RDEV
name = getttyname ("/dev", st.st_rdev, st.st_ino, save, &dostat);
#else
name = getttyname ("/dev", st.st_dev, st.st_ino, save, &dostat);
#endif
}
if (!name && dostat != -1)
{
dostat = 1;
#ifdef _STATBUF_ST_RDEV
name = getttyname ("/dev", st.st_rdev, st.st_ino, save, &dostat);
#else
name = getttyname ("/dev", st.st_dev, st.st_ino, save, &dostat);
#endif
}
return name;
}
/* Return the pathname of the terminal FD is open on, or NULL on errors.
The returned storage is good only until the next call to this function. */
char *
ttyname (int fd)
{
static size_t buflen;
char procname[30];
struct stat64 st, st1;
int dostat = 0;
char *name;
int save = errno;
struct termios term;
/* isatty check, tcgetattr is used because it sets the correct
errno (EBADF resp. ENOTTY) on error. */
if (__builtin_expect (__tcgetattr (fd, &term) < 0, 0))
return NULL;
/* We try using the /proc filesystem. */
*_fitoa_word (fd, __stpcpy (procname, "/proc/self/fd/"), 10, 0) = '\0';
if (buflen == 0)
{
buflen = 4095;
ttyname_buf = (char *) malloc (buflen + 1);
if (ttyname_buf == NULL)
{
buflen = 0;
return NULL;
}
}
ssize_t len = __readlink (procname, ttyname_buf, buflen);
if (__builtin_expect (len == -1 && errno == ENOENT, 0))
{
__set_errno (EBADF);
return NULL;
}
if (__builtin_expect (len != -1
#ifndef __ASSUME_PROC_SELF_FD_SYMLINK
/* This is for Linux 2.0. */
&& ttyname_buf[0] != '['
#endif
, 1))
{
if ((size_t) len >= buflen)
return NULL;
/* readlink need not terminate the string. */
ttyname_buf[len] = '\0';
return ttyname_buf;
}
if (__fxstat64 (_STAT_VER, fd, &st) < 0)
return NULL;
if (__xstat64 (_STAT_VER, "/dev/pts", &st1) == 0 && S_ISDIR (st1.st_mode))
{
#ifdef _STATBUF_ST_RDEV
name = getttyname ("/dev/pts", st.st_rdev, st.st_ino, save, &dostat);
#else
name = getttyname ("/dev/pts", st.st_dev, st.st_ino, save, &dostat);
#endif
}
else
{
__set_errno (save);
name = NULL;
}
if (!name && dostat != -1)
{
#ifdef _STATBUF_ST_RDEV
name = getttyname ("/dev", st.st_rdev, st.st_ino, save, &dostat);
#else
name = getttyname ("/dev", st.st_dev, st.st_ino, save, &dostat);
#endif
}
if (!name && dostat != -1)
{
dostat = 1;
#ifdef _STATBUF_ST_RDEV
name = getttyname ("/dev", st.st_rdev, st.st_ino, save, &dostat);
#else
name = getttyname ("/dev", st.st_dev, st.st_ino, save, &dostat);
#endif
}
return name;
}
/* Return the pathname of the terminal FD is open on, or NULL on errors.
The returned storage is good only until the next call to this function. */
char *
ttyname (int fd)
{
static size_t buflen;
char procname[30];
struct stat64 st, st1;
int dostat = 0;
char *name;
int save = errno;
struct termios term;
/* isatty check, tcgetattr is used because it sets the correct
errno (EBADF resp. ENOTTY) on error. */
if (__glibc_unlikely (__tcgetattr (fd, &term) < 0))
return NULL;
if (__fxstat64 (_STAT_VER, fd, &st) < 0)
return NULL;
/* We try using the /proc filesystem. */
*_fitoa_word (fd, __stpcpy (procname, "/proc/self/fd/"), 10, 0) = '\0';
if (buflen == 0)
{
buflen = 4095;
ttyname_buf = (char *) malloc (buflen + 1);
if (ttyname_buf == NULL)
{
buflen = 0;
return NULL;
}
}
ssize_t len = __readlink (procname, ttyname_buf, buflen);
if (__glibc_likely (len != -1))
{
if ((size_t) len >= buflen)
return NULL;
#define UNREACHABLE_LEN strlen ("(unreachable)")
if (len > UNREACHABLE_LEN
&& memcmp (ttyname_buf, "(unreachable)", UNREACHABLE_LEN) == 0)
{
memmove (ttyname_buf, ttyname_buf + UNREACHABLE_LEN,
len - UNREACHABLE_LEN);
len -= UNREACHABLE_LEN;
}
/* readlink need not terminate the string. */
ttyname_buf[len] = '\0';
/* Verify readlink result, fall back on iterating through devices. */
if (ttyname_buf[0] == '/'
&& __xstat64 (_STAT_VER, ttyname_buf, &st1) == 0
#ifdef _STATBUF_ST_RDEV
&& S_ISCHR (st1.st_mode)
&& st1.st_rdev == st.st_rdev
#else
&& st1.st_ino == st.st_ino
&& st1.st_dev == st.st_dev
#endif
)
return ttyname_buf;
}
if (__xstat64 (_STAT_VER, "/dev/pts", &st1) == 0 && S_ISDIR (st1.st_mode))
{
#ifdef _STATBUF_ST_RDEV
name = getttyname ("/dev/pts", st.st_rdev, st.st_ino, save, &dostat);
#else
name = getttyname ("/dev/pts", st.st_dev, st.st_ino, save, &dostat);
#endif
}
else
{
__set_errno (save);
name = NULL;
}
if (!name && dostat != -1)
{
#ifdef _STATBUF_ST_RDEV
name = getttyname ("/dev", st.st_rdev, st.st_ino, save, &dostat);
#else
name = getttyname ("/dev", st.st_dev, st.st_ino, save, &dostat);
#endif
}
if (!name && dostat != -1)
{
dostat = 1;
#ifdef _STATBUF_ST_RDEV
name = getttyname ("/dev", st.st_rdev, st.st_ino, save, &dostat);
#else
name = getttyname ("/dev", st.st_dev, st.st_ino, save, &dostat);
#endif
}
return name;
}
