store and rename logs upon reboot, do not delete

SD_ROOT/wz_mini/etc/init.d/v3_init.sh

@@ -4,8 +4,17 @@
 ###
 
 ###This file is run by switch_root, from the initramfs in the kernel.
-
-exec 1> /opt/wz_mini/log/v3_init.log 2>&1
+LOG_NAME=/opt/wz_mini/log/v3_init
+if [[ -e $LOG_NAME.log || -L $LOG_NAME.log ]] ; then
+    i=0
+    while [[ -e $LOG_NAME.log.$i || -L $LOG_NAME.log.$i ]] ; do
+        let i++
+    done
+        mv $LOG_NAME.log $LOG_NAME.log.$i
+    LOG_NAME=$LOG_NAME
+fi
+touch -- "$LOG_NAME".log
+exec 1> $LOG_NAME.log 2>&1
 
 export WZMINI_CFG=/opt/wz_mini/wz_mini.conf
 

SD_ROOT/wz_mini/etc/init.d/wz_cam.sh

@@ -1,8 +1,21 @@
 #!/bin/sh
 
+LOG_NAME=/opt/wz_mini/log/wz_cam
+if [[ -e $LOG_NAME.log || -L $LOG_NAME.log ]] ; then
+    i=0
+    while [[ -e $LOG_NAME.log.$i || -L $LOG_NAME.log.$i ]] ; do
+        let i++
+    done
+        mv $LOG_NAME.log $LOG_NAME.log.$i
+    LOG_NAME=$LOG_NAME
+fi
+touch -- "$LOG_NAME".log
+exec 1> $LOG_NAME.log 2>&1
+
 set -x
 
-exec 1> /opt/wz_mini/log/wz_cam.log 2>&1
+echo "welcome to wz_cam.sh"
+echo "PID $$"
 
 cp /opt/wz_mini/etc/uvc.config /opt/wz_mini/usr/bin/uvc.config
 

SD_ROOT/wz_mini/etc/init.d/wz_post.sh

@@ -2,7 +2,17 @@
 
 ### This file is called by /etc/init.d/rcS, and is run before app_init.sh
 
-exec 1> /opt/wz_mini/log/wz_post.log 2>&1
+LOG_NAME=/opt/wz_mini/log/wz_post
+if [[ -e $LOG_NAME.log || -L $LOG_NAME.log ]] ; then
+    i=0
+    while [[ -e $LOG_NAME.log.$i || -L $LOG_NAME.log.$i ]] ; do
+        let i++
+    done
+        mv $LOG_NAME.log $LOG_NAME.log.$i
+    LOG_NAME=$LOG_NAME
+fi
+touch -- "$LOG_NAME".log
+exec 1> $LOG_NAME.log 2>&1
 
 set -x
 

SD_ROOT/wz_mini/etc/init.d/wz_user.sh

@@ -1,6 +1,16 @@
 #!/bin/sh
 
-exec 1> /opt/wz_mini/log/wz_user.log 2>&1
+LOG_NAME=/opt/wz_mini/log/wz_user
+if [[ -e $LOG_NAME.log || -L $LOG_NAME.log ]] ; then
+    i=0
+    while [[ -e $LOG_NAME.log.$i || -L $LOG_NAME.log.$i ]] ; do
+        let i++
+    done
+        mv $LOG_NAME.log $LOG_NAME.log.$i
+    LOG_NAME=$LOG_NAME
+fi
+touch -- "$LOG_NAME".log
+exec 1> $LOG_NAME.log 2>&1
 
 set -x
 

SD_ROOT/wz_mini/usr/bin/watch_up.sh

@@ -1,6 +1,16 @@
 #!/bin/sh
 
-exec 1>> /opt/wz_mini/log/watch_up.log 2>&1
+LOG_NAME=/opt/wz_mini/log/watch_up
+if [[ -e $LOG_NAME.log || -L $LOG_NAME.log ]] ; then
+    i=0
+    while [[ -e $LOG_NAME.log.$i || -L $LOG_NAME.log.$i ]] ; do
+        let i++
+    done
+        mv $LOG_NAME.log $LOG_NAME.log.$i
+    LOG_NAME=$LOG_NAME
+fi
+touch -- "$LOG_NAME".log
+exec 1> $LOG_NAME.log 2>&1
 
 set -x