From 4f6ab64fed719987f83330afd4cb294d777a56c2 Mon Sep 17 00:00:00 2001
From: hellt <dodin.roman@gmail.com>
Date: Thu, 26 Jun 2025 11:19:10 +0200
Subject: [PATCH 1/3] added ifwait script

---
 Dockerfile    |  1 +
 entrypoint.sh |  4 ++++
 if-wait.sh    | 52 +++++++++++++++++++++++++++++++++++++++++++++++++++
 3 files changed, 57 insertions(+)
 create mode 100644 if-wait.sh

diff --git a/Dockerfile b/Dockerfile
index 6bf876d..47262f8 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -82,6 +82,7 @@ COPY gotty-service /usr/local/bin/gotty-service
 RUN chmod +x /usr/local/bin/gotty-service
 
 COPY entrypoint.sh /docker/entrypoint.sh
+COPY if-wait.sh /docker/if-wait.sh
 
 # Start nginx in foreground (pass CMD to docker entrypoint.sh):
 CMD ["/usr/sbin/nginx", "-g", "daemon off;"]
diff --git a/entrypoint.sh b/entrypoint.sh
index 9e2b618..7d007c9 100644
--- a/entrypoint.sh
+++ b/entrypoint.sh
@@ -1,3 +1,7 @@
+#!/bin/sh
+
+sh /docker/if-wait.sh
+
 ifup -a
 #########
 # create directories for ssh host keys
diff --git a/if-wait.sh b/if-wait.sh
new file mode 100644
index 0000000..0d54f68
--- /dev/null
+++ b/if-wait.sh
@@ -0,0 +1,52 @@
+#!/bin/sh
+
+# Validate CLAB_INTFS environment variable
+REQUIRED_INTFS_NUM=${CLAB_INTFS:-0}
+if ! echo "$REQUIRED_INTFS_NUM" | grep -qE '^[0-9]+$' || [ "$REQUIRED_INTFS_NUM" -eq 0 ]; then
+    echo "Warning: CLAB_INTFS not set or invalid, skipping interface wait"
+    REQUIRED_INTFS_NUM=0
+fi
+
+SLEEP=0
+TIMEOUT=300  # 5 minute timeout
+WAIT_TIME=0
+
+int_calc() {
+    if [ ! -d "/sys/class/net/" ]; then
+        echo "Error: /sys/class/net/ not accessible"
+        AVAIL_INTFS_NUM=0
+        return 1
+    fi
+    
+    # More comprehensive interface pattern including common container interfaces
+    AVAIL_INTFS_NUM=$(ls -1 /sys/class/net/ 2>/dev/null | grep -cE '^(eth[1-9]|et[0-9]|ens|eno|enp|e[1-9]|net[0-9])' || echo 0)
+    return 0
+}
+
+# Only wait for interfaces if CLAB_INTFS is set
+if [ "$REQUIRED_INTFS_NUM" -gt 0 ]; then
+    echo "Waiting for $REQUIRED_INTFS_NUM interfaces to be connected (timeout: ${TIMEOUT}s)"
+    
+    while [ "$WAIT_TIME" -lt "$TIMEOUT" ]; do
+        if ! int_calc; then
+            echo "Failed to check interfaces, continuing..."
+            break
+        fi
+        
+        if [ "$AVAIL_INTFS_NUM" -ge "$REQUIRED_INTFS_NUM" ]; then
+            echo "Found $AVAIL_INTFS_NUM interfaces (required: $REQUIRED_INTFS_NUM)"
+            break
+        fi
+        
+        echo "Connected $AVAIL_INTFS_NUM interfaces out of $REQUIRED_INTFS_NUM (waited ${WAIT_TIME}s)"
+        sleep 1
+        WAIT_TIME=$((WAIT_TIME + 1))
+    done
+    
+    if [ "$WAIT_TIME" -ge "$TIMEOUT" ]; then
+        echo "Warning: Timeout reached, proceeding with $AVAIL_INTFS_NUM interfaces"
+    fi
+fi
+
+echo "Sleeping $SLEEP seconds before boot"
+sleep $SLEEP
\ No newline at end of file

From e06eb8638d3a3739f59b562398a8166c70d39129 Mon Sep 17 00:00:00 2001
From: Roman Dodin <dodin.roman@gmail.com>
Date: Thu, 26 Jun 2025 13:16:36 +0200
Subject: [PATCH 2/3] sleep if more than 0

---
 if-wait.sh | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/if-wait.sh b/if-wait.sh
index 0d54f68..6bbfb39 100644
--- a/if-wait.sh
+++ b/if-wait.sh
@@ -48,5 +48,7 @@ if [ "$REQUIRED_INTFS_NUM" -gt 0 ]; then
     fi
 fi
 
-echo "Sleeping $SLEEP seconds before boot"
-sleep $SLEEP
\ No newline at end of file
+if [ "$SLEEP" -ne 0 ]; then
+    echo "Sleeping $SLEEP seconds before boot"
+    sleep $SLEEP
+fi
\ No newline at end of file

From 63ed75c0d05ede0ce13fa6805da9f8f0d6fd42d4 Mon Sep 17 00:00:00 2001
From: Roman Dodin <dodin.roman@gmail.com>
Date: Thu, 26 Jun 2025 14:12:58 +0200
Subject: [PATCH 3/3] remove unnecessary echo

---
 if-wait.sh | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/if-wait.sh b/if-wait.sh
index 6bbfb39..77bede5 100644
--- a/if-wait.sh
+++ b/if-wait.sh
@@ -19,7 +19,7 @@ int_calc() {
     fi
     
     # More comprehensive interface pattern including common container interfaces
-    AVAIL_INTFS_NUM=$(ls -1 /sys/class/net/ 2>/dev/null | grep -cE '^(eth[1-9]|et[0-9]|ens|eno|enp|e[1-9]|net[0-9])' || echo 0)
+    AVAIL_INTFS_NUM=$(ls -1 /sys/class/net/ 2>/dev/null | grep -cE '^(eth[1-9]|et[0-9]|ens|eno|enp|e[1-9]|net[0-9])')
     return 0
 }
 
@@ -51,4 +51,4 @@ fi
 if [ "$SLEEP" -ne 0 ]; then
     echo "Sleeping $SLEEP seconds before boot"
     sleep $SLEEP
-fi
\ No newline at end of file
+fi