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linux

/proc and /sys/... readers exposed as a Rust builtin. Linux-only — the table is registered empty on macOS and Windows. Plan 18 / v0.15.1.

Backed by the procfs crate; numbers are bytes (kB fields are converted in Rust so callers don't have to).

Host

• linux.kernel() → {version, hostname, os_release, btime}
• linux.uptime() → {uptime_secs, idle_secs}
• linux.loadavg() → {one, five, fifteen, running, total, last_pid}
• linux.meminfo() → {total, free, available, buffers, cached, swap_total, swap_free, …}
• linux.netdev() → per-interface RX/TX counters
• linux.diskstats() → per-block-device IO stats

CPU

• linux.cpu_stat() → aggregate /proc/stat first row, jiffies ({user, nice, system, idle, iowait, irq, softirq, steal, guest, guest_nice})
• linux.cpu_stat_per_core() → list of per-CPU rows
• linux.cpu_percent(prev, curr) → {total_pct} — Lua-side delta math, no kernel call

Per-process

• linux.proc_stat(pid) → /proc/<pid>/stat (state, ppid, utime, stime, vsize, rss_pages, num_threads, …)
• linux.proc_status(pid) → /proc/<pid>/status (name, uid, gid, vm_rss, vm_size, threads, …)

Errors surface as linux.X: … runtime errors. The process.list builtin gives you a names-and-cmdlines view; combine it with linux.proc_stat for a top-style readout.