utils: T8868: Refactor kernel command-line arguments and memory info

- Replaced direct file reads from `/proc/cmdline` with `get_kernel_boot_arg()`
  for fetching kernel command-line arguments in multiple modules.
- Improved memory information retrieval by utilizing `get_memory_info()`.

4 files changed, 13 insertions, 21 deletions

diff --git a/src/helpers/run-config-activation.py b/src/helpers/run-config-activation.py
index 7e7a6571e..9e048e193 100755
--- a/src/helpers/run-config-activation.py
+++ b/src/helpers/run-config-activation.py
@@ -30,6 +30,7 @@ from vyos.utils.activate import set_activation
 from vyos.utils.activate import is_active
 from vyos.utils.system import load_as_module
 from vyos.utils.func import FalseCallable
+from vyos.utils.kernel import get_kernel_boot_arg
 from vyos.defaults import directories
 from vyos.defaults import activation_list
 
@@ -54,7 +55,7 @@ fh.setFormatter(formatter)
 logger.addHandler(fh)
 
 
-if 'vyos-activate-debug' in Path('/proc/cmdline').read_text():
+if get_kernel_boot_arg('vyos-activate-debug') is not None:
     print(f'\nactivate-debug enabled: file {checkpoint_file}_* on error')
     debug = checkpoint_file
     logger.setLevel(logging.DEBUG)
diff --git a/src/helpers/run-config-migration.py b/src/helpers/run-config-migration.py
index 6329d2979..f538c1e86 100755
--- a/src/helpers/run-config-migration.py
+++ b/src/helpers/run-config-migration.py
@@ -19,7 +19,7 @@ import sys
 import time
 from argparse import ArgumentParser
 from shutil import copyfile
-from vyos.utils.file import read_file
+from vyos.utils.kernel import get_kernel_boot_arg
 
 from vyos.migrate import ConfigMigrate
 from vyos.migrate import ConfigMigrateError
@@ -80,6 +80,5 @@ if backup is not None and not config_migrate.config_modified:
 
 # T1771: add knob on Kernel command-line to simulate failed config migrator run
 # used to test if the automatic image reboot works.
-kernel_cmdline = read_file('/proc/cmdline')
-if 'vyos-fail-migration' in kernel_cmdline.split():
+if get_kernel_boot_arg('vyos-fail-migration') is not None:
     sys.exit(1)
diff --git a/src/helpers/vyos-boot-config-loader.py b/src/helpers/vyos-boot-config-loader.py
index a3a66eedc..e01b5bff6 100755
--- a/src/helpers/vyos-boot-config-loader.py
+++ b/src/helpers/vyos-boot-config-loader.py
@@ -28,6 +28,7 @@ from vyos.configsession import ConfigSessionError
 from vyos.configtree import ConfigTree
 from vyos.utils.process import cmdl
 from vyos.utils.file import write_file
+from vyos.utils.kernel import get_kernel_boot_arg
 
 STATUS_FILE = config_status
 TRACE_FILE = '/tmp/boot-config-trace'
@@ -44,11 +45,9 @@ else:
 LOG_FILE = LOG_DIR + '/vyos-boot-config-loader.log'
 
 try:
-    with open('/proc/cmdline', 'r') as f:
-        cmdline = f.read()
-    if 'vyos-debug' in cmdline:
+    if get_kernel_boot_arg('vyos-debug') is not None:
         os.environ['VYOS_DEBUG'] = 'yes'
-    if 'vyos-config-debug' in cmdline:
+    if get_kernel_boot_arg('vyos-config-debug') is not None:
         os.environ['VYOS_DEBUG'] = 'yes'
         trace_config = True
 except Exception as e:
diff --git a/src/op_mode/memory.py b/src/op_mode/memory.py
index 20d937243..47a9c476e 100755
--- a/src/op_mode/memory.py
+++ b/src/op_mode/memory.py
@@ -18,23 +18,16 @@
 import sys
 
 import vyos.opmode
+from vyos.utils.memory import get_memory_info
 
 
 def _get_raw_data():
-    from re import search as re_search
+    mem_info = get_memory_info()
 
-    def find_value(keyword, mem_data):
-        regex = keyword + ':\s+(\d+)'
-        res = re_search(regex, mem_data).group(1)
-        return int(res)
-
-    with open("/proc/meminfo", "r") as f:
-        mem_data = f.read()
-
-    total     = find_value('MemTotal', mem_data)
-    available = find_value('MemAvailable', mem_data)
-    buffers   = find_value('Buffers', mem_data)
-    cached    = find_value('Cached', mem_data)
+    total = mem_info['MemTotal']
+    available = mem_info['MemAvailable']
+    buffers = mem_info['Buffers']
+    cached = mem_info['Cached']
 
     used = total - available