1 /* Copyright (C) 1991,92,93,1995-2001, 2003 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
4 The GNU C Library is free software; you can redistribute it and/or
5 modify it under the terms of the GNU Lesser General Public
6 License as published by the Free Software Foundation; either
7 version 2.1 of the License, or (at your option) any later version.
9 The GNU C Library is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 Lesser General Public License for more details.
14 You should have received a copy of the GNU Lesser General Public
15 License along with the GNU C Library; if not, write to the Free
16 Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
23 #include <sys/types.h>
29 #include <stdio-common/_itoa.h>
31 static int getttyname_r (char *buf
, size_t buflen
,
32 dev_t mydev
, ino64_t myino
, int save
,
33 int *dostat
) internal_function
;
37 getttyname_r (char *buf
, size_t buflen
, dev_t mydev
, ino64_t myino
,
38 int save
, int *dostat
)
43 size_t devlen
= strlen (buf
);
45 dirstream
= __opendir (buf
);
46 if (dirstream
== NULL
)
52 while ((d
= __readdir64 (dirstream
)) != NULL
)
53 if ((d
->d_fileno
== myino
|| *dostat
)
54 && strcmp (d
->d_name
, "stdin")
55 && strcmp (d
->d_name
, "stdout")
56 && strcmp (d
->d_name
, "stderr"))
59 size_t needed
= _D_EXACT_NAMLEN (d
) + 1;
64 (void) __closedir (dirstream
);
69 cp
= __stpncpy (buf
+ devlen
, d
->d_name
, needed
);
72 if (__xstat64 (_STAT_VER
, buf
, &st
) == 0
73 #ifdef _STATBUF_ST_RDEV
74 && S_ISCHR (st
.st_mode
) && st
.st_rdev
== mydev
76 && d
->d_fileno
== myino
&& st
.st_dev
== mydev
80 (void) __closedir (dirstream
);
86 (void) __closedir (dirstream
);
88 /* It is not clear what to return in this case. `isatty' says FD
89 refers to a TTY but no entry in /dev has this inode. */
93 /* Store at most BUFLEN character of the pathname of the terminal FD is
94 open on in BUF. Return 0 on success, otherwise an error number. */
96 __ttyname_r (int fd
, char *buf
, size_t buflen
)
99 struct stat64 st
, st1
;
104 /* Test for the absolute minimal size. This makes life easier inside
108 __set_errno (EINVAL
);
112 if (buflen
< sizeof ("/dev/pts/"))
114 __set_errno (ERANGE
);
118 /* We try using the /proc filesystem. */
119 *_fitoa_word (fd
, __stpcpy (procname
, "/proc/self/fd/"), 10, 0) = '\0';
121 ret
= __readlink (procname
, buf
, buflen
- 1);
122 if (ret
== -1 && errno
== ENOENT
)
130 __set_errno (ENOTTY
);
134 if (ret
== -1 && errno
== ENAMETOOLONG
)
136 __set_errno (ERANGE
);
140 if (ret
!= -1 && buf
[0] != '[')
146 if (__fxstat64 (_STAT_VER
, fd
, &st
) < 0)
149 /* Prepare the result buffer. */
150 memcpy (buf
, "/dev/pts/", sizeof ("/dev/pts/"));
151 buflen
-= sizeof ("/dev/pts/") - 1;
153 if (__xstat64 (_STAT_VER
, buf
, &st1
) == 0 && S_ISDIR (st1
.st_mode
))
155 #ifdef _STATBUF_ST_RDEV
156 ret
= getttyname_r (buf
, buflen
, st
.st_rdev
, st
.st_ino
, save
,
159 ret
= getttyname_r (buf
, buflen
, st
.st_dev
, st
.st_ino
, save
,
169 if (ret
&& dostat
!= -1)
171 buf
[sizeof ("/dev/") - 1] = '\0';
172 buflen
+= sizeof ("pts/") - 1;
173 #ifdef _STATBUF_ST_RDEV
174 ret
= getttyname_r (buf
, buflen
, st
.st_rdev
, st
.st_ino
, save
,
177 ret
= getttyname_r (buf
, buflen
, st
.st_dev
, st
.st_ino
, save
,
182 if (ret
&& dostat
!= -1)
184 buf
[sizeof ("/dev/") - 1] = '\0';
186 #ifdef _STATBUF_ST_RDEV
187 ret
= getttyname_r (buf
, buflen
, st
.st_rdev
, st
.st_ino
,
190 ret
= getttyname_r (buf
, buflen
, st
.st_dev
, st
.st_ino
,
198 weak_alias (__ttyname_r
, ttyname_r
)