Originální popis anglicky:
ttyname, ttyname_r - find the pathname of a terminal
Návod, kniha: POSIX Programmer's Manual
#include <unistd.h>
char *ttyname(int
fildes);
int ttyname_r(int fildes, char *name, size_t
namesize);
The
ttyname() function shall return a pointer to a string containing a
null-terminated pathname of the terminal associated with file descriptor
fildes. The return value may point to static data whose content is
overwritten by each call.
The
ttyname() function need not be reentrant. A function that is not
required to be reentrant is not required to be thread-safe.
The
ttyname_r() function shall store the null-terminated pathname of the
terminal associated with the file descriptor
fildes in the character
array referenced by
name. The array is
namesize characters long
and should have space for the name and the terminating null character. The
maximum length of the terminal name shall be {TTY_NAME_MAX}.
Upon successful completion,
ttyname() shall return a pointer to a string.
Otherwise, a null pointer shall be returned and
errno set to indicate
the error.
If successful, the
ttyname_r() function shall return zero. Otherwise, an
error number shall be returned to indicate the error.
The
ttyname() function may fail if:
- EBADF
- The fildes argument is not a valid file
descriptor.
- ENOTTY
- The fildes argument does not refer to a terminal.
The
ttyname_r() function may fail if:
- EBADF
- The fildes argument is not a valid file
descriptor.
- ENOTTY
- The fildes argument does not refer to a
terminal.
- ERANGE
- The value of namesize is smaller than the length of
the string to be returned including the terminating null character.
The following sections are informative.
None.
None.
The term ``terminal'' is used instead of the historical term ``terminal device''
in order to avoid a reference to an undefined term.
The thread-safe version places the terminal name in a user-supplied buffer and
returns a non-zero value if it fails. The non-thread-safe version may return
the name in a static data area that may be overwritten by each call.
None.
The Base Definitions volume of IEEE Std 1003.1-2001,
<unistd.h>
Portions of this text are reprinted and reproduced in electronic form from IEEE
Std 1003.1, 2003 Edition, Standard for Information Technology -- Portable
Operating System Interface (POSIX), The Open Group Base Specifications Issue
6, Copyright (C) 2001-2003 by the Institute of Electrical and Electronics
Engineers, Inc and The Open Group. In the event of any discrepancy between
this version and the original IEEE and The Open Group Standard, the original
IEEE and The Open Group Standard is the referee document. The original
Standard can be obtained online at http://www.opengroup.org/unix/online.html
.
