[PATCH proxmox-backup v3 06/15] pbs-config: use proxmox-product-config helpers

[Christian Ebner <c.ebner@proxmox.com>]

Avoids expensive user lookups via pbs-config::backup_user(),
which internally calls User::from_name() and uses getpwnam_r(3) [0],
therefore can involve nsswitch.conf and /etc/passwd parsing
requiring several syscalls to do so.

[0] https://docs.rs/nix/0.29.0/nix/unistd/struct.User.html#method.from_name

Signed-off-by: Christian Ebner <c.ebner@proxmox.com>
---
 pbs-config/src/config_version_cache.rs | 2 +-
 pbs-config/src/encryption_keys.rs      | 2 +-
 pbs-config/src/token_shadow.rs         | 8 +-------
 3 files changed, 3 insertions(+), 9 deletions(-)

diff --git a/pbs-config/src/config_version_cache.rs b/pbs-config/src/config_version_cache.rs
index a282da746..5053f6dc6 100644
--- a/pbs-config/src/config_version_cache.rs
+++ b/pbs-config/src/config_version_cache.rs
@@ -92,7 +92,7 @@ impl ConfigVersionCache {
 
     // Actual work of `new`:
     fn open() -> Result<Arc<Self>, Error> {
-        let user = crate::backup_user()?;
+        let user = proxmox_product_config::get_api_user();
 
         let dir_opts = CreateOptions::new()
             .perm(Mode::from_bits_truncate(0o770))
diff --git a/pbs-config/src/encryption_keys.rs b/pbs-config/src/encryption_keys.rs
index 3f8870254..367ac1e12 100644
--- a/pbs-config/src/encryption_keys.rs
+++ b/pbs-config/src/encryption_keys.rs
@@ -107,7 +107,7 @@ pub fn store_key(id: &str, key: &KeyConfig) -> Result<(), Error> {
         bail!("key with id '{id}' already exists.");
     }
 
-    let backup_user = crate::backup_user()?;
+    let backup_user = proxmox_product_config::get_api_user();
     let dir_options = CreateOptions::new()
         .perm(Mode::from_bits_truncate(0o0750))
         .owner(Uid::from_raw(0))
diff --git a/pbs-config/src/token_shadow.rs b/pbs-config/src/token_shadow.rs
index 871218411..d931cc6fa 100644
--- a/pbs-config/src/token_shadow.rs
+++ b/pbs-config/src/token_shadow.rs
@@ -9,7 +9,6 @@ use parking_lot::RwLock;
 use serde::{Deserialize, Serialize};
 use serde_json::{Value, from_value};
 
-use proxmox_sys::fs::CreateOptions;
 use proxmox_time::epoch_i64;
 
 use pbs_api_types::Authid;
@@ -59,12 +58,7 @@ fn read_file() -> Result<HashMap<Authid, String>, Error> {
 }
 
 fn write_file(data: HashMap<Authid, String>) -> Result<(), Error> {
-    let backup_user = crate::backup_user()?;
-    let options = CreateOptions::new()
-        .perm(nix::sys::stat::Mode::from_bits_truncate(0o0640))
-        .owner(backup_user.uid)
-        .group(backup_user.gid);
-
+    let options = proxmox_product_config::default_create_options();
     let json = serde_json::to_vec(&data)?;
     proxmox_sys::fs::replace_file(CONF_FILE, &json, options, true)
 }
-- 
2.47.3