Add new flag --disable-compression/-D that allows writing ZIP file

uncompressed. Also rewrite coredump piping code to use io::copy which
prevents core dump corruption in large core dumps.

Signed-off-by: André Stein <[email protected]>

Author: stonemaster

core-dump-composer/src/config.rs

@@ -26,6 +26,7 @@ pub struct CoreConfig {
     pub os_hostname: String,
     pub filename_template: String,
     pub params: CoreParams,
+    pub disable_compression: bool,
 }
 
 #[derive(Serialize)]
@@ -62,6 +63,7 @@ impl CoreConfig {
             .unwrap_or("120")
             .parse::<u64>()
             .unwrap();
+        let disable_compression = matches.contains_id("disable-compression");
 
         let uuid = Uuid::new_v4();
 
@@ -144,6 +146,7 @@ impl CoreConfig {
             filename_template,
             log_length,
             params,
+            disable_compression,
         })
     }
 
@@ -208,11 +211,11 @@ impl CoreConfig {
         format!("{}-ps-info.json", self.get_templated_name())
     }
 
-    pub fn get_image_filename(&self, counter: u32) -> String {
+    pub fn get_image_filename(&self, counter: usize) -> String {
         format!("{}-{}-image-info.json", self.get_templated_name(), counter)
     }
 
-    pub fn get_log_filename(&self, counter: u32) -> String {
+    pub fn get_log_filename(&self, counter: usize) -> String {
         format!("{}-{}.log", self.get_templated_name(), counter)
     }
     pub fn get_zip_full_path(&self) -> String {
@@ -315,6 +318,13 @@ pub fn try_get_matches() -> clap::Result<ArgMatches> {
                 .takes_value(true)
                 .help("test-threads mapped to support the test scenarios"),
         )
+        .arg(
+            Arg::new("disable-compression")
+                .short('D')
+                .long("disable-compression")
+                .takes_value(false)
+                .help("Disables deflate compression in resulting zip file and stores data uncompressed."),
+        )
         .try_get_matches()
 }
 

core-dump-composer/src/main.rs

@@ -111,8 +111,13 @@ fn handle(mut cc: config::CoreConfig) -> Result<(), anyhow::Error> {
     cc.set_podname(podname.to_string());
 
     // Create the base zip file that we are going to put everything into
+    let compression_method = if cc.disable_compression {
+        zip::CompressionMethod::Stored
+    } else {
+        zip::CompressionMethod::Deflated
+    };
     let options = FileOptions::default()
-        .compression_method(zip::CompressionMethod::Deflated)
+        .compression_method(compression_method)
         .unix_permissions(0o444)
         .large_file(true);
 
@@ -159,20 +164,14 @@ fn handle(mut cc: config::CoreConfig) -> Result<(), anyhow::Error> {
 
     let stdin = io::stdin();
     let mut stdin = stdin.lock();
-    let mut data = [0u8; 8192];
 
-    while let Ok(n) = stdin.read(&mut data) {
-        if n == 0 {
-            break;
+    match io::copy(&mut stdin, &mut zip) {
+        Ok(v) => v,
+        Err(e) => {
+            error!("Error writing core file \n{}", e);
+            process::exit(1);
         }
-        match zip.write_all(&data) {
-            Ok(v) => v,
-            Err(e) => {
-                error!("Error writing core file \n{}", e);
-                process::exit(1);
-            }
-        };
-    }
+    };
     zip.flush()?;
 
     if cc.ignore_crio {