PTSNAMESection: Linux Programmer's Manual (3)
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NAMEptsname, ptsname_r - get the name of the slave pseudoterminal
#define _XOPEN_SOURCE /* See feature_test_macros(7) */
#include <stdlib.h> char *ptsname(int fd); #define _GNU_SOURCE /* See feature_test_macros(7) */
#include <stdlib.h> int ptsname_r(int fd, char *buf, size_t buflen);
DESCRIPTIONThe 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-terminated string in the buffer pointed to by buf. The buflen argument specifies the number of bytes available in buf.
RETURN VALUEOn 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.
- (ptsname_r() only) buf is NULL.
- fd does not refer to a pseudoterminal master device.
- (ptsname_r() only) buf is too small.
VERSIONSptsname() is provided in glibc since version 2.1.
ATTRIBUTESFor an explanation of the terms used in this section, see attributes(7).
|ptsname()||Thread safety||MT-Unsafe race:ptsname|
CONFORMING TOPOSIX.1-2001, POSIX.1-2008.
ptsname() is part of the UNIX 98 pseudoterminal support (see pts(4)).
ptsname_r() is a Linux extension. 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.
SEE ALSOgrantpt(3), posix_openpt(3), ttyname(3), unlockpt(3), pts(4), pty(7)
COLOPHONThis page is part of release 4.04 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 http://www.kernel.org/doc/man-pages/.
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