GNU/Linux man pages
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GNU/Linux |
CentOS 5.3 |
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ttyname(3) |
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ttyname, ttyname_r − return name of a terminal
#include <unistd.h>
char
*ttyname(int fd);
int ttyname_r(int fd, char *buf,
size_t buflen);
The function ttyname() returns a pointer to the null-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.
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.
Values stored in errno by a failing ttyname() or returned by a failing ttyname_r():
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EBADF |
Bad file descriptor. | ||
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ENOTTY |
File descriptor does not refer to a terminal device. | ||
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ERANGE |
buflen was too small to allow storing the pathname. |
4.2BSD, POSIX.1-2001.
fstat(2), isatty(3)
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ttyname(3) | |