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From: Lukas Wagner <l.wagner@proxmox.com>
To: pve-devel@lists.proxmox.com
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Subject: [pve-devel] [PATCH proxmox 02/11] sys: email: add `forward`
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This new function forwards an email to new recipients.
Signed-off-by: Lukas Wagner <l.wagner@proxmox.com>
---
proxmox-sys/src/email.rs | 52 +++++++++++++++++++++++++++++++++++++++-
1 file changed, 51 insertions(+), 1 deletion(-)
diff --git a/proxmox-sys/src/email.rs b/proxmox-sys/src/email.rs
index da910d4..cf7091a 100644
--- a/proxmox-sys/src/email.rs
+++ b/proxmox-sys/src/email.rs
@@ -3,7 +3,7 @@
use std::io::Write;
use std::process::{Command, Stdio};
-use anyhow::{bail, Error};
+use anyhow::{bail, format_err, Error};
/// Sends multi-part mail with text and/or html to a list of recipients
///
@@ -107,6 +107,56 @@ pub fn sendmail(
Ok(())
}
+/// Forwards an email message to a given list of recipients.
+///
+/// ``sendmail`` is used for sending the mail, thus `message` must be
+/// compatible with that (the message is piped into stdin unmodified).
+pub fn forward(
+ mailto: &[&str],
+ mailfrom: &str,
+ message: &[u8],
+ uid: Option<u32>,
+) -> Result<(), Error> {
+ use std::os::unix::process::CommandExt;
+
+ if mailto.is_empty() {
+ bail!("At least one recipient has to be specified!")
+ }
+
+ let mut builder = Command::new("/usr/sbin/sendmail");
+
+ builder
+ .args([
+ "-N", "never", // never send DSN (avoid mail loops)
+ "-f", mailfrom, "--",
+ ])
+ .args(mailto)
+ .stdin(Stdio::piped())
+ .stdout(Stdio::null())
+ .stderr(Stdio::null());
+
+ if let Some(uid) = uid {
+ builder.uid(uid);
+ }
+
+ let mut process = builder
+ .spawn()
+ .map_err(|err| format_err!("could not spawn sendmail process: {err}"))?;
+
+ process
+ .stdin
+ .take()
+ .unwrap()
+ .write_all(message)
+ .map_err(|err| format_err!("couldn't write to sendmail stdin: {err}"))?;
+
+ process
+ .wait()
+ .map_err(|err| format_err!("sendmail did not exit successfully: {err}"))?;
+
+ Ok(())
+}
+
#[cfg(test)]
mod test {
use crate::email::sendmail;
--
2.39.2