ptsname(3C)                                                     ptsname(3C)

NAME
     ptsname - get name of the slave pseudo-terminal device

SYNOPSIS
     #include <stdlib.h>

     char *ptsname(int fildes);

DESCRIPTION
     The function ptsname() returns the name of the slave pseudo-terminal
     device associated with a master pseudo-terminal device. fildes is a
     file descriptor returned from a successful open of the master device.
     ptsname() returns a pointer to a string containing the null-terminated
     path name of the slave device of the form /dev/pts/N, where N is an
     integer between 0 and 255.

RETURN VALUE
     Upon successful completion, the function ptsname() returns a pointer
     to a string which is the name of the pseudo-terminal slave device.
     This value points to a static data area that is overwritten by each
     call to ptsname(). Upon failure, ptsname() returns NULL. This could
     occur if fildes is an invalid file descriptor or if the slave device
     name does not exist in the file system.

SEE ALSO
     open(2), grantpt(3C), ttyname(3C), unlockpt(3C).





























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