feat(server): Add Embedded HTTP Server & REST API, Systemd Service Manager, Multi-User Auth, Syslog, Crond, and Server Metrics

include/kernel/cron.h

@@ -0,0 +1,28 @@
+#ifndef _KERNEL_CRON_H
+#define _KERNEL_CRON_H
+
+#include <stdint.h>
+#include <stddef.h>
+#include <stdbool.h>
+
+#define MAX_CRON_JOBS 16
+
+typedef struct cron_job {
+    uint32_t id;
+    char command[128];
+    uint32_t interval_sec;
+    uint64_t last_run_tick;
+    uint32_t run_count;
+    bool enabled;
+    bool in_use;
+} cron_job_t;
+
+void cron_init(void);
+int  cron_add_job(const char* command, uint32_t interval_sec);
+int  cron_remove_job(uint32_t id);
+void cron_tick(void);
+
+size_t cron_get_job_count(void);
+const cron_job_t* cron_get_job(size_t index);
+
+#endif // _KERNEL_CRON_H

include/kernel/metrics.h

@@ -0,0 +1,25 @@
+#ifndef _KERNEL_METRICS_H
+#define _KERNEL_METRICS_H
+
+#include <stdint.h>
+#include <stddef.h>
+
+typedef struct system_metrics {
+    uint32_t cpu_user_pct;
+    uint32_t cpu_system_pct;
+    uint32_t cpu_idle_pct;
+    uint64_t mem_total_kb;
+    uint64_t mem_used_kb;
+    uint64_t mem_free_kb;
+    uint64_t net_rx_bytes;
+    uint64_t net_tx_bytes;
+    uint64_t net_rx_packets;
+    uint64_t net_tx_packets;
+    uint64_t disk_read_sectors;
+    uint64_t disk_written_sectors;
+} system_metrics_t;
+
+void metrics_init(void);
+void metrics_sample(system_metrics_t* out);
+
+#endif // _KERNEL_METRICS_H

include/kernel/syslog.h

@@ -0,0 +1,39 @@
+#ifndef _KERNEL_SYSLOG_H
+#define _KERNEL_SYSLOG_H
+
+#include <stdint.h>
+#include <stddef.h>
+#include <stdbool.h>
+
+#define LOG_EMERG   0
+#define LOG_ALERT   1
+#define LOG_CRIT    2
+#define LOG_ERR     3
+#define LOG_WARNING 4
+#define LOG_NOTICE  5
+#define LOG_INFO    6
+#define LOG_DEBUG   7
+
+#define LOG_KERN    (0<<3)
+#define LOG_USER    (1<<3)
+#define LOG_DAEMON  (3<<3)
+#define LOG_AUTH    (4<<3)
+#define LOG_SYSLOG  (5<<3)
+
+#define SYSLOG_BUFFER_SIZE 128
+#define SYSLOG_MSG_MAX     128
+
+typedef struct syslog_entry {
+    uint64_t timestamp;
+    uint8_t  priority;
+    char     facility_str[12];
+    char     ident[24];
+    char     message[SYSLOG_MSG_MAX];
+} syslog_entry_t;
+
+void syslog_init(void);
+void syslog_write(int priority, const char* ident, const char* message);
+size_t syslog_get_count(void);
+const syslog_entry_t* syslog_get_entry(size_t index);
+
+#endif // _KERNEL_SYSLOG_H