ttyname, ttyname_r: návratový název terminálu

Originální popis anglicky: ttyname, ttyname_r - return name of a terminal

Návod, kniha: Linux Programmer's Manual

STRUČNĚ

#include <unistd.h>
 
char *ttyname(int fd);
 
int ttyname_r(int fd, char *buf, size_t buflen);

POPIS / INSTRUKCE

The function ttyname() returns a pointer to the NUL-terminated pathname of the terminal device that is open on the file descriptor fd, or NULL on error (for example, if fd is not connected to a terminal). The return value may point to static data, possibly overwritten by the next call. The function ttyname_r() stores this pathname in the buffer buf of length buflen.

NÁVRATOVÁ HODNOTA

The function ttyname() returns a pointer to a pathname on success. On error, NULL is returned, and errno is set appropriately. The function ttyname_r() returns 0 on success, and an error number upon error.

CHYBY / ERRORY

Values stored in errno by a failing ttyname() or returned by a failing ttyname_r():

EBADF

Bad file descriptor.

ENOTTY

File descriptor does not refer to a terminal device.

ERANGE

buflen was too small to allow storing the pathname.

ODPOVÍDAJÍCÍ

POSIX.1

SOUVISEJÍCÍ

fstat(2), isatty(3)