aboutsummaryrefslogtreecommitdiff
diff options
context:
space:
mode:
authorChoong YinThong <yin.thong.choong@intel.com>2017-04-13 17:26:39 -0700
committerRichard Purdie <richard.purdie@linuxfoundation.org>2017-06-03 23:43:28 +0100
commitac0e9541fe93e866e42914f65a0516b993f0cffe (patch)
tree5d6daac95f2f0b272742da187438c9bb8681baa1
parent031cf9c7834cd1cba8b03832673a3e3cfcbfae7c (diff)
downloadopenembedded-core-ac0e9541fe93e866e42914f65a0516b993f0cffe.zip
openembedded-core-ac0e9541fe93e866e42914f65a0516b993f0cffe.tar.gz
openembedded-core-ac0e9541fe93e866e42914f65a0516b993f0cffe.tar.bz2
start_getty: Over added SERIAL_CONSOLE cause error in userspace log
Error log will be logged into /var/log/message. Added in more condition checking on the script. Check /proc/tty/drivers and /proc/tty/driver/* file system to retrieve active targeted serial. Only establish getty with active serial in runtime. [YOCTO #10844] Reviewed-by: Saul Wold <sgw@linux.intel.com> Signed-off-by: Choong YinThong <yin.thong.choong@intel.com> Signed-off-by: Ross Burton <ross.burton@intel.com>
-rw-r--r--meta/recipes-core/sysvinit/sysvinit-inittab/start_getty38
1 files changed, 34 insertions, 4 deletions
diff --git a/meta/recipes-core/sysvinit/sysvinit-inittab/start_getty b/meta/recipes-core/sysvinit/sysvinit-inittab/start_getty
index e3d052a..31b4413 100644
--- a/meta/recipes-core/sysvinit/sysvinit-inittab/start_getty
+++ b/meta/recipes-core/sysvinit/sysvinit-inittab/start_getty
@@ -1,5 +1,35 @@
#!/bin/sh
-if [ -c /dev/$2 ]
-then
- /sbin/getty -L $1 $2 $3
-fi
+####################################################################################
+# This script is use to automatic start serial console once power up.
+# Script enhancement has been done base on Bug YOCTO 10844.
+# Configuration can be done in meta/conf/machine/*.conf variable SERIAL_CONSOLES.
+# Most of the information is retrieve from /proc virtual filesystem which
+# contain all the runtime system information (eg. system memory, device mount, etc).
+####################################################################################
+
+# Get active serial filename.
+active_serial=$(grep "serial" /proc/tty/drivers | grep -oh "^\s*\S*")
+
+# Re-phrase input parameter from ttyS target index (ttyS1, ttyS2, ttyAMA0, etc).
+runtime_tty=$(echo $2 | grep -oh '[0-9]')
+
+for line in $active_serial; do
+ # File is availability, file content current active serial target index.
+ if [ -e /proc/tty/driver/$line ]
+ then
+ # File content a lot of unknown serial. We use -v to remove all unmatch and get left off.
+ # Tail use to avoid 1st line included into the filter because 1st line is file description.
+ activetty=$(grep -v "unknown" /proc/tty/driver/$line | tail -n +2 | grep -oh "^\s*\S*[0-9]")
+ for active in $activetty; do
+ # Check if both index is match then proceed to enable the serial console.
+ if [ $active -eq $runtime_tty ]
+ then
+ if [ -c /dev/$2 ]
+ then
+ /sbin/getty -L $1 $2 $3
+ fi
+ break
+ fi
+ done
+ fi
+done