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ptsname(3) [bsd man page]

PTSNAME(3)						     Linux Programmer's Manual							PTSNAME(3)

NAME
ptsname, ptsname_r - get the name of the slave pseudoterminal 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 || (_XOPEN_SOURCE && _XOPEN_SOURCE_EXTENDED) Glibc 2.23 and earlier: _XOPEN_SOURCE ptsname_r(): _GNU_SOURCE DESCRIPTION
The ptsname() function returns the name of the slave pseudoterminal device corresponding to the master referred to by fd. The ptsname_r() function is the reentrant equivalent of ptsname(). It returns the name of the slave pseudoterminal device as a null-termi- nated string in the buffer pointed to by buf. The buflen argument specifies the number of bytes available in buf. 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, a nonzero value is returned and errno is set to indicate the error. ERRORS
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. VERSIONS
ptsname() is provided in glibc since version 2.1. 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 | +------------+---------------+------------------------+ 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 func- tion 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. SEE ALSO
grantpt(3), posix_openpt(3), ttyname(3), unlockpt(3), pts(4), pty(7) COLOPHON
This page is part of release 4.15 of the Linux man-pages project. A description of the project, information about reporting bugs, and the latest version of this page, can be found at https://www.kernel.org/doc/man-pages/. 2017-09-15 PTSNAME(3)

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PTSNAME(3)						     Linux Programmer's Manual							PTSNAME(3)

NAME
ptsname, ptsname_r - get the name of the slave pseudoterminal 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 || (_XOPEN_SOURCE && _XOPEN_SOURCE_EXTENDED) Glibc 2.23 and earlier: _XOPEN_SOURCE ptsname_r(): _GNU_SOURCE DESCRIPTION
The ptsname() function returns the name of the slave pseudoterminal device corresponding to the master referred to by fd. The ptsname_r() function is the reentrant equivalent of ptsname(). It returns the name of the slave pseudoterminal device as a null-termi- nated string in the buffer pointed to by buf. The buflen argument specifies the number of bytes available in buf. 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, a nonzero value is returned and errno is set to indicate the error. ERRORS
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. VERSIONS
ptsname() is provided in glibc since version 2.1. 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 | +------------+---------------+------------------------+ 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 func- tion 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. SEE ALSO
grantpt(3), posix_openpt(3), ttyname(3), unlockpt(3), pts(4), pty(7) COLOPHON
This page is part of release 4.15 of the Linux man-pages project. A description of the project, information about reporting bugs, and the latest version of this page, can be found at https://www.kernel.org/doc/man-pages/. 2017-09-15 PTSNAME(3)

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