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Name

Synopsis

#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);

Description

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 Value

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.

ENOTTY

fd does not refer to a pseudoterminal master device.

ERANGE

(ptsname_r() only) buf is too small.

Versions

Attributes

Multithreading (see pthreads(7) )

The ptsname_r() function is thread-safe.

Conforming to

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 Also

Colophon

Table of Contents

• Name
• Synopsis
• Description
• Return Value
• Errors
• Versions
• Attributes
• Multithreading (see pthreads(7))
• Conforming to
• See Also
• Colophon