Standard C library (libc, -lc)
#include <asm/termbits.h> /* Definition of TIOCSTI */ #include <sys/ioctl.h>
int ioctl(int fd, TIOCSTI, const char *argp);
Insert the given byte in the input queue.
Since Linux 6.2, this operation may require the CAP_SYS_ADMIN capability (if the dev.tty.legacy_tiocsti sysctl variable is set to false).
On success, 0 is returned. On error, -1 is returned, and errno is set to indicate the error.