ptsname, ptsname_r - get the name of the slave pseudoterminal
#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
The ptsname() function returns the name of the slave pseudoterminal device corresponding to the master referred to by
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
buflen argument specifies the number of bytes available in
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.
ptsname() is provided in glibc since version 2.1.
For an explanation of the terms used in this section, see attributes(7).
|ptsname()||Thread safety||MT-Unsafe race:ptsname|
ptsname(): POSIX.1-2001, POSIX.1-2008.
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.
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