Adding symple system info module.

src/kira_sysinfo.rs

@@ -0,0 +1,97 @@
+// <Kira Installer - universal Linux installer.>
+// Copyright (C) <2026>  <Kira Foundation> <Kira>
+
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+
+// You should have received a copy of the GNU General Public License
+// along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+/*
+   This file contains functions to query system information.
+*/
+
+use std::collections::HashMap;
+use std::fs;
+
+///
+/// vis_vram_total - size of vram in bytes
+#[derive(Debug, Clone, PartialEq, Eq)]
+pub struct GpuInfo {
+    pub id: u8,
+    pub name: String,
+    pub vis_vram_total: u64,
+}
+
+/// See /proc/meminfo output format and units (kB)
+pub fn get_meminfo() -> HashMap<String, u64> {
+    let mem_info_str = fs::read_to_string("/proc/meminfo").unwrap();
+
+    mem_info_str
+        .lines()
+        .filter_map(|l| {
+            l.split_once(':').and_then(|(k, v)| {
+                u64::from_str_radix(v.trim_end_matches("kB").trim(), 10)
+                    .ok()
+                    .and_then(|v_num| Some((k.to_string(), v_num)))
+            })
+        })
+        .collect()
+}
+
+// cat /sys/class/drm/card1/device/mem_info_vis_vram_total
+pub fn get_gpus_list() -> Vec<GpuInfo> {
+    let drm_devs_dirs: Vec<(String, u8)> = fs::read_dir("/sys/class/drm/")
+        .unwrap()
+        .filter_map(|maybe_entry| {
+            maybe_entry.ok().and_then(|entry| {
+                entry.file_type().ok().and_then(|ft| {
+                    if ft.is_symlink() || ft.is_dir() {
+                        entry.file_name().into_string().ok()
+                    } else {
+                        None
+                    }
+                })
+            })
+        })
+        .filter(|f_name| f_name.len() == 5 && f_name.starts_with("card"))
+        .filter_map(|dir_name| {
+            dir_name.split_once("card").and_then(|name_touple| {
+                u8::from_str_radix(name_touple.1, 10)
+                    .ok()
+                    .and_then(|gpu_id| Some((dir_name.clone(), gpu_id)))
+            })
+        })
+        .collect();
+
+    let res: Vec<GpuInfo> = drm_devs_dirs
+        .iter()
+        .filter_map(|(d, id)| {
+            fs::read_to_string(format!(
+                "/sys/class/drm/{}/device/mem_info_vis_vram_total",
+                d
+            ))
+            .ok()
+            .and_then(|mem_str| {
+                u64::from_str_radix(mem_str.trim(), 10)
+                    .ok()
+                    .and_then(|mem_size| {
+                        Some(GpuInfo {
+                            id: *id,
+                            name: d.clone(),
+                            vis_vram_total: mem_size,
+                        })
+                    })
+            })
+        })
+        .collect();
+
+    res
+}