La conectarea dintr-un terminal (tty2) la un port serial (ttyS1) cu
minicom, la un alt port serial (ttyS0), iar intr-un alt terminal
(tty1) aculta getty, dupa logare se pot lansa comenzi normal, merge
inclusiv links, putin mc care blocheaza complet tty1 (cel cu getty)
nu se mai poate intrerupe cu ^C:
/sbin/getty -L ttyS0 115200 vt100
Setarile minicom
│ A - Serial Device : /dev/ttyS1 │
│ B - Lockfile Location : /var/lock │
│ C - Callin Program : │
│ D - Callout Program : │
│ E - Bps/Par/Bits : 115200 8N1 │
│ F - Hardware Flow Control : Yes │
│ G - Software Flow Control : No │
setserial -a /dev/ttyS0
/dev/ttyS0, Line 0, UART: 16550A, Port: 0x03f8, IRQ: 4
Baud_base: 115200, close_delay: 50, divisor: 0
closing_wait: 3000
Flags: spd_normal skip_test
# setserial -a /dev/ttyS1
/dev/ttyS1, Line 1, UART: 16550A, Port: 0x02f8, IRQ: 3
Baud_base: 115200, close_delay: 50, divisor: 0
closing_wait: 3000
Flags: spd_normal skip_test
Porturile seriale sunt pe aceiasi placa de baza si sunt legate prin
cablu null-modem.
##################################################
In inittab sunt decomentate
T0:23:respawn:/sbin/getty -L ttyS0 9600 vt100
T1:23:respawn:/sbin/getty -L ttyS1 9600 vt100
La reinitializarea procesului init (init q) nu ar trebui sa existe
niste procese care sa asculte pe cele doua porturi seriale seriale
similar celor pentru terminale (la logare) ?
#ps aux | grep getty
root 3806 0.0 0.0 1568 452 tty5 Ss+ 08:57 0:00
/sbin/getty 38400 tty5
root 3811 0.0 0.0 1572 456 tty6 Ss+ 08:57 0:00
/sbin/getty 38400 tty6
root 15445 0.0 0.0 1568 452 tty2 Ss+ 21:18 0:00
/sbin/getty 38400 tty2
root 15452 0.0 0.0 1568 452 tty1 Ss+ 21:18 0:00
/sbin/getty 38400 tty1
root 15455 0.0 0.0 1572 456 tty3 Ss+ 21:18 0:00
/sbin/getty 38400 tty3
root 15464 0.0 0.0 1568 452 tty4 Ss+ 21:19 0:00
/sbin/getty 38400 tty4
Minicom nu vrea sa se coneteze deloc nici la ttyS0 nici la ttyS1 (cu
setarile de rigoare la 9600 bit). Nu are unde ?
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