GNU/Linux man pages
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GNU/Linux |
Debian 6.0.6(Squeeze) |
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ptsname(3) |
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ptsname, ptsname_r − get the name of the slave pseudo-terminal
#define
_XOPEN_SOURCE
#include <stdlib.h>
char *ptsname(int fd);
#define
_GNU_SOURCE
#include <stdlib.h>
int ptsname_r(int fd, char *buf, size_t buflen);
The ptsname() function returns the name of the slave pseudo-terminal (pty) 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 pseudo-terminal device as a null-terminated string in the buffer pointed to by buf. The buflen argument specifies the number of bytes available in buf.
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, a NULL pointer is returned.
On success, ptsname_r() returns 0. On failure, a nonzero value is returned and errno is set to indicate the error.
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EINVAL |
(ptsname_r() only) buf is NULL. | ||
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ENOTTY |
fd does not refer to a pseudo-terminal master device. | ||
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ERANGE |
(ptsname_r() only) buf is too small. |
ptsname() is provided in glibc since version 2.1.
ptsname() is part of the Unix98 pseudo-terminal support (see pts(4)). This function is specified in POSIX.1-2001.
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.
grantpt(3), posix_openpt(3), ttyname(3), unlockpt(3), pts(4), feature_test_macros(7), pty(7)
This page is part of release 3.27 of the Linux man-pages project. A description of the project, and information about reporting bugs, can be found at http://www.kernel.org/doc/man-pages/.
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ptsname(3) | |