Actually, with sufficient permission :
root@adelpha:/dev# cat ttyS0 cat: ttyS0: Erreur d'entrée/sortie (mean : IO Error) root@adelpha:/dev# cat wacom cat: wacom: Erreur d'entrée/sortie root@adelpha:/dev# setserial ttyS0 ttyS0, UART: 16550A, Port: 0x0338, IRQ: 4 root@adelpha:/dev# setserial -a ttyS0 ttyS0, Line 0, UART: 16550A, Port: 0x0338, IRQ: 4 Baud_base: 115200, close_delay: 50, divisor: 0 closing_wait: 3000 Flags: spd_normal skip_t
Actually, with sufficient permission :
root@adelpha:/dev# cat ttyS0
closing_ wait: 3000
cat: ttyS0: Erreur d'entrée/sortie (mean : IO Error)
root@adelpha:/dev# cat wacom
cat: wacom: Erreur d'entrée/sortie
root@adelpha:/dev# setserial ttyS0
ttyS0, UART: 16550A, Port: 0x0338, IRQ: 4
root@adelpha:/dev# setserial -a ttyS0
ttyS0, Line 0, UART: 16550A, Port: 0x0338, IRQ: 4
Baud_base: 115200, close_delay: 50, divisor: 0
Flags: spd_normal skip_t