TIOCCONS2const
Redirecting console output
Usage
#include <asm/termbits.h> /* Definition of TIOCCONS */ #include <sys/ioctl.h>
int ioctl(int fd, TIOCCONS);
Library
Standard C library (libc, -lc)
Overview
Redirect output that would have gone to /dev/console or /dev/tty0 to the given terminal. If that was a pseudoterminal master, send it to the slave.
Only a process with the CAP_SYS_ADMIN capability may do this.
If output was redirected already, then EBUSY is returned, but redirection can be stopped by using this ioctl with fd pointing at /dev/console or /dev/tty0.
Return value
On success, 0 is returned. On error, -1 is returned, and errno is set to indicate the error.
Errors
EBUSY
|
Output was redirected already. |
|---|---|
EPERM
|
Insufficient permission. |
Releases
2 releases since Debian 13 (Trixie); the text changed 1 time.