config: Add general.source_profile

This adds a system-wide toggle for whether the system profile should be
sourced by /bin/sh before running the command. Note that the command
will still be run with /bin/sh, regardless of profile sourcing.

The option defaults to true for now.

Example usage:

	[general]
	source_profile = false

greetd/src/config/mod.rs

@@ -35,9 +35,15 @@ pub struct ConfigTerminal {
     pub vt: VtSelection,
 }
 
+#[derive(Debug, Eq, PartialEq, Default)]
+pub struct ConfigGeneral {
+    pub source_profile: bool,
+}
+
 #[derive(Debug, Eq, PartialEq, Default)]
 pub struct ConfigFile {
     pub terminal: ConfigTerminal,
+    pub general: ConfigGeneral,
     pub default_session: ConfigSession,
     pub initial_session: Option<ConfigSession>,
 }
@@ -91,6 +97,9 @@ fn parse_old_config(config: &HashMap<&str, HashMap<&str, &str>>) -> Result<Confi
             user: greeter_user,
             command: greeter,
         },
+        general: ConfigGeneral {
+            source_profile: true,
+        },
         initial_session: None,
     })
 }
@@ -150,9 +159,23 @@ fn parse_new_config(config: &HashMap<&str, HashMap<&str, &str>>) -> Result<Confi
         None => Err("no terminal specified"),
     }?;
 
+    let general = match config.get("general") {
+        Some(section) => ConfigGeneral {
+            source_profile: section
+                .get("source_profile")
+                .unwrap_or(&"true")
+                .parse()
+                .map_err(|e| format!("could not parse source_profile: {}", e))?,
+        },
+        None => ConfigGeneral {
+            source_profile: true,
+        },
+    };
+
     Ok(ConfigFile {
         initial_session,
         default_session,
+        general,
         terminal,
     })
 }

greetd/src/context.rs

@@ -40,6 +40,7 @@ pub struct Context {
     greeter_service: String,
     pam_service: String,
     term_mode: TerminalMode,
+    source_profile: bool,
 }
 
 impl Context {
@@ -49,6 +50,7 @@ impl Context {
         greeter_service: String,
         pam_service: String,
         term_mode: TerminalMode,
+        source_profile: bool,
     ) -> Context {
         Context {
             inner: RwLock::new(ContextInner {
@@ -61,6 +63,7 @@ impl Context {
             greeter_service,
             pam_service,
             term_mode,
+            source_profile,
         }
     }
 
@@ -76,7 +79,14 @@ impl Context {
     ) -> Result<SessionChild, Error> {
         let mut scheduled_session = Session::new_external()?;
         scheduled_session
-            .initiate(&service, class, user, false, &self.term_mode)
+            .initiate(
+                &service,
+                class,
+                user,
+                false,
+                &self.term_mode,
+                self.source_profile,
+            )
             .await?;
         loop {
             match scheduled_session.get_state().await {
@@ -162,7 +172,14 @@ impl Context {
         };
         session_set
             .session
-            .initiate(&self.pam_service, "user", &username, true, &self.term_mode)
+            .initiate(
+                &self.pam_service,
+                "user",
+                &username,
+                true,
+                &self.term_mode,
+                self.source_profile,
+            )
             .await?;
 
         let mut session = Some(session_set);

greetd/src/server.rs

@@ -221,6 +221,7 @@ pub async fn main(config: Config) -> Result<(), Error> {
         greeter_service.to_string(),
         service.to_string(),
         term_mode.clone(),
+        config.file.general.source_profile,
     ));
 
     if let Some(s) = config.file.initial_session {

greetd/src/session/interface.rs

@@ -137,6 +137,7 @@ impl Session {
         user: &str,
         authenticate: bool,
         term_mode: &TerminalMode,
+        source_profile: bool,
     ) -> Result<(), Error> {
         let msg = ParentToSessionChild::InitiateLogin {
             service: service.to_string(),
@@ -144,6 +145,7 @@ impl Session {
             user: user.to_string(),
             authenticate,
             tty: term_mode.clone(),
+            source_profile,
         };
         msg.send(&mut self.sock).await?;
         Ok(())

greetd/src/session/worker.rs

@@ -40,6 +40,7 @@ pub enum ParentToSessionChild {
         user: String,
         authenticate: bool,
         tty: TerminalMode,
+        source_profile: bool,
     },
     PamResponse {
         resp: Option<String>,
@@ -80,14 +81,16 @@ impl SessionChildToParent {
 /// responsible for the entirety of the session setup and execution. It is
 /// started by Session::start.
 fn worker(sock: &UnixDatagram) -> Result<(), Error> {
-    let (service, class, user, authenticate, tty) = match ParentToSessionChild::recv(sock)? {
+    let (service, class, user, authenticate, tty, source_profile) =
+        match ParentToSessionChild::recv(sock)? {
             ParentToSessionChild::InitiateLogin {
                 service,
                 class,
                 user,
                 authenticate,
                 tty,
-        } => (service, class, user, authenticate, tty),
+                source_profile,
+            } => (service, class, user, authenticate, tty, source_profile),
             ParentToSessionChild::Cancel => return Err("cancelled".into()),
             msg => return Err(format!("expected InitiateLogin or Cancel, got: {:?}", msg).into()),
         };
@@ -206,10 +209,14 @@ fn worker(sock: &UnixDatagram) -> Result<(), Error> {
 
     // Prepare some strings in C format that we'll need.
     let cusername = CString::new(username)?;
-    let command = format!(
+    let command = if source_profile {
+        format!(
             "[ -f /etc/profile ] && . /etc/profile; [ -f $HOME/.profile ] && . $HOME/.profile; exec {}",
             cmd.join(" ")
-    );
+        )
+    } else {
+        format!("exec {}", cmd.join(" "))
+    };
 
     // Extract PAM environment for use with execve below.
     let pamenvlist = pam.getenvlist()?;