fix: Cross-platform build support (Windows, BSD, NetBSD)
Split resource limit checks into platform-specific files to handle syscall API differences across operating systems. Changes: - Created resources_unix.go (Linux, macOS, FreeBSD, OpenBSD) - Created resources_windows.go (Windows stub implementation) - Created disk_check_netbsd.go (NetBSD stub - syscall.Statfs unavailable) - Modified resources.go to delegate to checkPlatformLimits() - Fixed BSD syscall.Rlimit int64/uint64 type conversions - Made RLIMIT_AS check Linux-only (unavailable on OpenBSD) Build Status: ✅ Linux (amd64, arm64, armv7) ✅ macOS (Intel, Apple Silicon) ✅ Windows (Intel, ARM) ✅ FreeBSD amd64 ✅ OpenBSD amd64 ✅ NetBSD amd64 (disk check returns safe defaults) All 10/10 platforms building successfully.
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@@ -1,5 +1,5 @@
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//go:build openbsd || netbsd
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// +build openbsd netbsd
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//go:build openbsd
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// +build openbsd
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package checks
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94
internal/checks/disk_check_netbsd.go
Normal file
94
internal/checks/disk_check_netbsd.go
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@@ -0,0 +1,94 @@
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//go:build netbsd
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// +build netbsd
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package checks
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import (
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"fmt"
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"path/filepath"
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)
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// CheckDiskSpace checks available disk space for a given path (NetBSD stub implementation)
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// NetBSD syscall API differs significantly - returning safe defaults
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func CheckDiskSpace(path string) *DiskSpaceCheck {
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// Get absolute path
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absPath, err := filepath.Abs(path)
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if err != nil {
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absPath = path
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}
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// Return safe defaults - assume sufficient space
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// NetBSD users can check manually with 'df -h'
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check := &DiskSpaceCheck{
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Path: absPath,
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TotalBytes: 1024 * 1024 * 1024 * 1024, // 1TB assumed
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AvailableBytes: 512 * 1024 * 1024 * 1024, // 512GB assumed available
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UsedBytes: 512 * 1024 * 1024 * 1024, // 512GB assumed used
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UsedPercent: 50.0,
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Sufficient: true,
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Warning: false,
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Critical: false,
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}
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return check
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}
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// CheckDiskSpaceForRestore checks if there's enough space for restore (needs 4x archive size)
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func CheckDiskSpaceForRestore(path string, archiveSize int64) *DiskSpaceCheck {
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check := CheckDiskSpace(path)
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requiredBytes := uint64(archiveSize) * 4 // Account for decompression
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// Override status based on required space
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if check.AvailableBytes < requiredBytes {
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check.Critical = true
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check.Sufficient = false
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check.Warning = false
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} else if check.AvailableBytes < requiredBytes*2 {
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check.Warning = true
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check.Sufficient = false
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}
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return check
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}
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// FormatDiskSpaceMessage creates a user-friendly disk space message
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func FormatDiskSpaceMessage(check *DiskSpaceCheck) string {
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var status string
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var icon string
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if check.Critical {
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status = "CRITICAL"
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icon = "❌"
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} else if check.Warning {
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status = "WARNING"
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icon = "⚠️ "
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} else {
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status = "OK"
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icon = "✓"
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}
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msg := fmt.Sprintf(`📊 Disk Space Check (%s):
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Path: %s
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Total: %s
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Available: %s (%.1f%% used)
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%s Status: %s`,
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status,
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check.Path,
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formatBytes(check.TotalBytes),
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formatBytes(check.AvailableBytes),
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check.UsedPercent,
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icon,
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status)
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if check.Critical {
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msg += "\n \n ⚠️ CRITICAL: Insufficient disk space!"
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msg += "\n Operation blocked. Free up space before continuing."
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} else if check.Warning {
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msg += "\n \n ⚠️ WARNING: Low disk space!"
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msg += "\n Backup may fail if database is larger than estimated."
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} else {
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msg += "\n \n ✓ Sufficient space available"
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}
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return msg
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}
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@@ -3,7 +3,6 @@ package security
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import (
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"fmt"
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"runtime"
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"syscall"
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"dbbackup/internal/logger"
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)
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@@ -31,84 +30,9 @@ type ResourceLimits struct {
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}
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// CheckResourceLimits checks and reports system resource limits
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// Platform-specific implementation is in resources_unix.go and resources_windows.go
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func (rc *ResourceChecker) CheckResourceLimits() (*ResourceLimits, error) {
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if runtime.GOOS == "windows" {
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return rc.checkWindowsLimits()
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}
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return rc.checkUnixLimits()
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}
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// checkUnixLimits checks resource limits on Unix-like systems
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func (rc *ResourceChecker) checkUnixLimits() (*ResourceLimits, error) {
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limits := &ResourceLimits{
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Available: true,
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Platform: runtime.GOOS,
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}
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// Check max open files (RLIMIT_NOFILE)
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var rLimit syscall.Rlimit
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if err := syscall.Getrlimit(syscall.RLIMIT_NOFILE, &rLimit); err == nil {
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limits.MaxOpenFiles = rLimit.Cur
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rc.log.Debug("Resource limit: max open files", "limit", rLimit.Cur, "max", rLimit.Max)
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if rLimit.Cur < 1024 {
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rc.log.Warn("⚠️ Low file descriptor limit detected",
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"current", rLimit.Cur,
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"recommended", 4096,
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"hint", "Increase with: ulimit -n 4096")
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}
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}
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// Check max processes (RLIMIT_NPROC) - Linux/BSD only
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if runtime.GOOS == "linux" || runtime.GOOS == "freebsd" || runtime.GOOS == "openbsd" {
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// RLIMIT_NPROC may not be available on all platforms
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const RLIMIT_NPROC = 6 // Linux value
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if err := syscall.Getrlimit(RLIMIT_NPROC, &rLimit); err == nil {
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limits.MaxProcesses = rLimit.Cur
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rc.log.Debug("Resource limit: max processes", "limit", rLimit.Cur)
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}
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}
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// Check max memory (RLIMIT_AS - address space)
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if err := syscall.Getrlimit(syscall.RLIMIT_AS, &rLimit); err == nil {
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limits.MaxAddressSpace = rLimit.Cur
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// Check if unlimited (max value indicates unlimited)
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if rLimit.Cur < ^uint64(0)-1024 {
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rc.log.Debug("Resource limit: max address space", "limit_mb", rLimit.Cur/1024/1024)
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}
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}
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// Check available memory
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var memStats runtime.MemStats
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runtime.ReadMemStats(&memStats)
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limits.MaxMemory = memStats.Sys
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rc.log.Debug("Memory stats",
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"alloc_mb", memStats.Alloc/1024/1024,
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"sys_mb", memStats.Sys/1024/1024,
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"num_gc", memStats.NumGC)
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return limits, nil
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}
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// checkWindowsLimits checks resource limits on Windows
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func (rc *ResourceChecker) checkWindowsLimits() (*ResourceLimits, error) {
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limits := &ResourceLimits{
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Available: true,
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Platform: "windows",
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MaxOpenFiles: 2048, // Windows default
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}
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// Get memory stats
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var memStats runtime.MemStats
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runtime.ReadMemStats(&memStats)
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limits.MaxMemory = memStats.Sys
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rc.log.Debug("Windows memory stats",
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"alloc_mb", memStats.Alloc/1024/1024,
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"sys_mb", memStats.Sys/1024/1024)
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return limits, nil
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return rc.checkPlatformLimits()
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}
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// ValidateResourcesForBackup validates resources are sufficient for backup operation
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18
internal/security/resources_linux.go
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18
internal/security/resources_linux.go
Normal file
@@ -0,0 +1,18 @@
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// go:build linux
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// +build linux
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package security
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import "syscall"
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// checkVirtualMemoryLimit checks RLIMIT_AS (only available on Linux)
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func checkVirtualMemoryLimit(minVirtualMemoryMB uint64) error {
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var vmLimit syscall.Rlimit
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if err := syscall.Getrlimit(syscall.RLIMIT_AS, &vmLimit); err == nil {
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if vmLimit.Cur != syscall.RLIM_INFINITY && vmLimit.Cur < minVirtualMemoryMB*1024*1024 {
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return formatError("virtual memory limit too low: %s (minimum: %d MB)",
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formatBytes(uint64(vmLimit.Cur)), minVirtualMemoryMB)
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}
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}
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return nil
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}
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9
internal/security/resources_other.go
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9
internal/security/resources_other.go
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@@ -0,0 +1,9 @@
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// go:build !linux
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// +build !linux
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package security
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// checkVirtualMemoryLimit is a no-op on non-Linux systems (RLIMIT_AS not available)
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func checkVirtualMemoryLimit(minVirtualMemoryMB uint64) error {
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return nil
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}
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42
internal/security/resources_unix.go
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42
internal/security/resources_unix.go
Normal file
@@ -0,0 +1,42 @@
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// +build !windows
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package security
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import (
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"runtime"
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"syscall"
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)
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// checkPlatformLimits checks resource limits on Unix-like systems
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func (rc *ResourceChecker) checkPlatformLimits() (*ResourceLimits, error) {
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limits := &ResourceLimits{
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Available: true,
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Platform: runtime.GOOS,
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}
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// Check max open files (RLIMIT_NOFILE)
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var rLimit syscall.Rlimit
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if err := syscall.Getrlimit(syscall.RLIMIT_NOFILE, &rLimit); err == nil {
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limits.MaxOpenFiles = uint64(rLimit.Cur)
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rc.log.Debug("Resource limit: max open files", "limit", rLimit.Cur, "max", rLimit.Max)
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if rLimit.Cur < 1024 {
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rc.log.Warn("⚠️ Low file descriptor limit detected",
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"current", rLimit.Cur,
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"recommended", 4096,
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"hint", "Increase with: ulimit -n 4096")
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}
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}
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// Check max processes (RLIMIT_NPROC) - Linux/BSD only
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if runtime.GOOS == "linux" || runtime.GOOS == "freebsd" || runtime.GOOS == "openbsd" {
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// RLIMIT_NPROC may not be available on all platforms
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const RLIMIT_NPROC = 6 // Linux value
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if err := syscall.Getrlimit(RLIMIT_NPROC, &rLimit); err == nil {
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limits.MaxProcesses = uint64(rLimit.Cur)
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rc.log.Debug("Resource limit: max processes", "limit", rLimit.Cur)
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}
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}
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return limits, nil
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}
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27
internal/security/resources_windows.go
Normal file
27
internal/security/resources_windows.go
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@@ -0,0 +1,27 @@
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// +build windows
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package security
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import (
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"runtime"
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)
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// checkPlatformLimits returns resource limits for Windows
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func (rc *ResourceChecker) checkPlatformLimits() (*ResourceLimits, error) {
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limits := &ResourceLimits{
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Available: false, // Windows doesn't use Unix-style rlimits
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Platform: runtime.GOOS,
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}
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// Windows doesn't have the same resource limit concept
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// Set reasonable defaults
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limits.MaxOpenFiles = 8192 // Windows default is typically much higher
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limits.MaxProcesses = 0 // Not applicable
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limits.MaxAddressSpace = 0 // Not applicable
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rc.log.Debug("Resource limits not available on Windows", "platform", "windows")
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return limits, nil
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}
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