Function ListProcesses

internal/proc/process_list_linux.go:19–45

ListProcesses returns all running processes with the columns the TUI renders (PID, PPID, command, user, start time, CPU%, RSS, mem%, command line). It reads /proc directly instead of forking `ps -axo`, computing the same lifetime-average CPU% that ps reports — no subprocess per refresh.

()

// reads /proc directly instead of forking `ps -axo`, computing the same
// lifetime-average CPU% that ps reports — no subprocess per refresh.
func ListProcesses() ([]model.Process, error) {
	entries, err := os.ReadDir("/proc")
	if err != nil {
		return nil, fmt.Errorf("read /proc: %w", err)
	}

	// Per-list invariants, computed once rather than per process.
	ticks := ticksPerSecond()
	boot := bootTime()
	totalMem := float64(totalMemoryBytes())
	pageSize := float64(os.Getpagesize())

	processes := make([]model.Process, 0, len(entries))
	for _, entry := range entries {
		if !entry.IsDir() {
			continue
		}
		pid, err := strconv.Atoi(entry.Name())
		if err != nil {
			continue
		}
		if p, ok := readProcessListEntry(pid, ticks, boot, totalMem, pageSize); ok {
			processes = append(processes, p)
		}
	}
	return processes, nil
}

// readProcessListEntry reads the TUI list columns for one PID from /proc,
// mirroring the fields the old `ps -axo` invocation produced. Returns ok=false