From 3d6365989f57a96f12e02dc85b111beb7947ec73 Mon Sep 17 00:00:00 2001
From: Valentin Lorentz
Date: Wed, 4 Aug 2021 22:27:55 +0200
Subject: Fix argv index error in 'unknown option' message.

It looks like ya_getopt increments `optind` between reading the argument
and returning.

Before:

```
$ ./build/GCC-8.3/bin/inspircd --foo bar
Error: unknown option 'bar'.
$ ./build/GCC-8.3/bin/inspircd --help
Error: unknown option '%
```

After:

```
$ ./build/GCC-8.3/bin/inspircd --foo bar
Error: unknown option '--foo'.
Usage: ./build/GCC-8.3/bin/inspircd [--config <file>] [--debug] [--nofork] [--nolog]
                                    [--nopid] [--runasroot] [--version]
$ ./build/GCC-8.3/bin/inspircd --help
Error: unknown option '--help'.
Usage: ./build/GCC-8.3/bin/inspircd [--config <file>] [--debug] [--nofork] [--nolog]
                                    [--nopid] [--runasroot] [--version]

```
---
 src/inspircd.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'src/inspircd.cpp')

diff --git a/src/inspircd.cpp b/src/inspircd.cpp
index 56b8178d2..f7421dd7b 100644
--- a/src/inspircd.cpp
+++ b/src/inspircd.cpp
@@ -324,7 +324,7 @@ namespace
 
 				default:
 					// An unknown option was specified.
-					std::cout << con_red << "Error:" <<  con_reset << " unknown option '" << argv[optind] << "'." << std::endl
+					std::cout << con_red << "Error:" <<  con_reset << " unknown option '" << argv[optind-1] << "'." << std::endl
 						<< con_bright << "Usage: " << con_reset << argv[0] << " [--config <file>] [--debug] [--nofork] [--nolog]" << std::endl
 						<< std::string(strlen(argv[0]) + 8, ' ') << "[--nopid] [--runasroot] [--version]" << std::endl;
 					ServerInstance->Exit(EXIT_STATUS_ARGV);
-- 
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