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authorProfpatsch <mail@profpatsch.de>2021-02-09T20·06+0100
committerProfpatsch <mail@profpatsch.de>2021-02-13T20·00+0000
commit060600f0d796d096979f09304292fb998778cc51 (patch)
tree98bd654efd4212a9a269c2c14806884c863643a8 /users/Profpatsch/execline/exec_helpers.rs
parent1e5baa0dea9375ffc9b446b369e552876f6a15fd (diff)
feat(users/Profpatsch/execline/exec_helpers): add no_args() r/2206
Some programs don’t need any arguments, so fail if they do get them,
because that’s usually a bug.

Change-Id: I28639056d3d9cea0cc0e7fcbfa42120c4f129c8c
Reviewed-on: https://cl.tvl.fyi/c/depot/+/2503
Tested-by: BuildkiteCI
Reviewed-by: Profpatsch <mail@profpatsch.de>
Diffstat (limited to 'users/Profpatsch/execline/exec_helpers.rs')
-rw-r--r--users/Profpatsch/execline/exec_helpers.rs9
1 files changed, 9 insertions, 0 deletions
diff --git a/users/Profpatsch/execline/exec_helpers.rs b/users/Profpatsch/execline/exec_helpers.rs
index b0b0984911a5..bc4650fbad9a 100644
--- a/users/Profpatsch/execline/exec_helpers.rs
+++ b/users/Profpatsch/execline/exec_helpers.rs
@@ -2,6 +2,15 @@ use std::os::unix::process::CommandExt;
 use std::ffi::OsStr;
 use std::os::unix::ffi::{OsStringExt, OsStrExt};
 
+pub fn no_args(current_prog_name: &str) -> () {
+    let mut args = std::env::args_os();
+    // remove argv[0]
+    let _ = args.nth(0);
+    if args.len() > 0 {
+        die_user_error(current_prog_name, format!("Expected no arguments, got {:?}", args.collect::<Vec<_>>()))
+    }
+}
+
 pub fn args_for_exec(current_prog_name: &str, no_of_positional_args: usize) -> (Vec<Vec<u8>>, Vec<Vec<u8>>) {
     let mut args = std::env::args_os();
     // remove argv[0]