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   ptsname    ( 3 )

получить имя подчиненного псевдотерминала (get the name of the slave pseudoterminal)

Имя (Name)

ptsname, ptsname_r - get the name of the slave pseudoterminal

Синопсис (Synopsis)

#include <stdlib.h>

char *ptsname(int fd); int ptsname_r(int fd, char *buf, size_t buflen);

Feature Test Macro Requirements for glibc (see feature_test_macros(7)):

ptsname(): Since glibc 2.24: _XOPEN_SOURCE >= 500 Glibc 2.23 and earlier: _XOPEN_SOURCE

ptsname_r(): _GNU_SOURCE


Описание (Description)

The ptsname() function returns the name of the slave
       pseudoterminal device corresponding to the master referred to by
       the file descriptor fd.

The ptsname_r() function is the reentrant equivalent of ptsname(). It returns the name of the slave pseudoterminal device as a null-terminated string in the buffer pointed to by buf. The buflen argument specifies the number of bytes available in buf.


Возвращаемое значение (Return value)

On success, ptsname() returns a pointer to a string in static
       storage which will be overwritten by subsequent calls.  This
       pointer must not be freed.  On failure, NULL is returned.

On success, ptsname_r() returns 0. On failure, an error number is returned to indicate the error.


Ошибки (Error)

EINVAL (ptsname_r() only) buf is NULL.  (This error is returned
              only for glibc 2.25 and earlier.)

ENOTTY fd does not refer to a pseudoterminal master device.

ERANGE (ptsname_r() only) buf is too small.


Версии (Versions)

ptsname() is provided in glibc since version 2.1.

Атрибуты (Attributes)

For an explanation of the terms used in this section, see
       attributes(7).

┌───────────────────────┬───────────────┬────────────────────────┐ │Interface Attribute Value │ ├───────────────────────┼───────────────┼────────────────────────┤ │ptsname() │ Thread safety │ MT-Unsafe race:ptsname │ ├───────────────────────┼───────────────┼────────────────────────┤ │ptsname_r() │ Thread safety │ MT-Safe │ └───────────────────────┴───────────────┴────────────────────────┘


Стандарты (Conforming to)

ptsname():
        POSIX.1-2001, POSIX.1-2008.

ptsname() is part of the UNIX 98 pseudoterminal support (see pts(4)).

ptsname_r() is a Linux extension, that is proposed for inclusion in the next major revision of POSIX.1 (Issue 8). A version of this function is documented on Tru64 and HP-UX, but on those implementations, -1 is returned on error, with errno set to indicate the error. Avoid using this function in portable programs.


Смотри также (See also)

grantpt(3), posix_openpt(3), ttyname(3), unlockpt(3), pts(4),
       pty(7)