Adding upstream version 1.64.0+dfsg1.upstream/1.64.0+dfsg1

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 55 insertions, 0 deletions

diff --git a/vendor/sysinfo/src/linux/utils.rs b/vendor/sysinfo/src/linux/utils.rs
new file mode 100644
index 000000000..cd881a3d1
--- /dev/null
+++ b/vendor/sysinfo/src/linux/utils.rs
@@ -0,0 +1,55 @@
+// Take a look at the license at the top of the repository in the LICENSE file.
+
+use std::fs::File;
+use std::io::{self, Read, Seek, SeekFrom};
+use std::path::Path;
+
+pub(crate) fn get_all_data_from_file(file: &mut File, size: usize) -> io::Result<String> {
+    let mut buf = String::with_capacity(size);
+    file.seek(SeekFrom::Start(0))?;
+    file.read_to_string(&mut buf)?;
+    Ok(buf)
+}
+
+pub(crate) fn get_all_data<P: AsRef<Path>>(file_path: P, size: usize) -> io::Result<String> {
+    let mut file = File::open(file_path.as_ref())?;
+    get_all_data_from_file(&mut file, size)
+}
+
+#[allow(clippy::useless_conversion)]
+pub(crate) fn realpath(original: &Path) -> std::path::PathBuf {
+    use libc::{lstat, stat, S_IFLNK, S_IFMT};
+    use std::fs;
+    use std::mem::MaybeUninit;
+    use std::path::PathBuf;
+
+    fn and(x: u32, y: u32) -> u32 {
+        x & y
+    }
+
+    // let ori = Path::new(original.to_str().unwrap());
+    // Right now lstat on windows doesn't work quite well
+    // if cfg!(windows) {
+    //     return PathBuf::from(ori);
+    // }
+    let result = PathBuf::from(original);
+    let mut result_s = result.to_str().unwrap_or("").as_bytes().to_vec();
+    result_s.push(0);
+    let mut buf = MaybeUninit::<stat>::uninit();
+    unsafe {
+        let res = lstat(result_s.as_ptr() as *const _, buf.as_mut_ptr());
+        if res < 0 {
+            PathBuf::new()
+        } else {
+            let buf = buf.assume_init();
+            if and(buf.st_mode.into(), S_IFMT.into()) != S_IFLNK.into() {
+                PathBuf::new()
+            } else {
+                match fs::read_link(&result) {
+                    Ok(f) => f,
+                    Err(_) => PathBuf::new(),
+                }
+            }
+        }
+    }
+}