C

    Find controlling terminal with ttyname

    RyanBy Updated:1 Comment1 Min Read

    You can identify the path the the controlling terminal device path for your current process in C with the ttyname() system call. This controlling terminal can be a virtual console (/dev/ttyn) or a pseudo-terminal (/dev/pts/n).

    The ttyname system call takes the following format.

    char *ttyname(int fd);

    The stdin, stdout, stderr file descriptors unless redirected are by default mapped to the controlling terminal. So for example you can pass it the stdin file descriptor.

    char * pathname;
pathname = ttyname(0);

printf("controlling terminal : %s\n", pathname);

    controlling terminal : /dev/pts/0
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