From b210e870c99e028d5c6ad8d26efe60dbd14c43c2 Mon Sep 17 00:00:00 2001
From: "evan@chromium.org"
 <evan@chromium.org@0039d316-1c4b-4281-b951-d872f2087c98>
Date: Thu, 23 Jul 2009 21:43:22 +0000
Subject: linux: show the manpage on -h or --help

Review URL: http://codereview.chromium.org/160026

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@21450 0039d316-1c4b-4281-b951-d872f2087c98
---
 chrome/app/chrome_dll_main.cc | 10 ++++++++++
 1 file changed, 10 insertions(+)

(limited to 'chrome/app')

diff --git a/chrome/app/chrome_dll_main.cc b/chrome/app/chrome_dll_main.cc
index 52a9334..652217e 100644
--- a/chrome/app/chrome_dll_main.cc
+++ b/chrome/app/chrome_dll_main.cc
@@ -338,6 +338,16 @@ int ChromeMain(int argc, const char** argv) {
     return 1;
 #endif
 
+#if defined(OS_LINUX)
+  // Show the man page on --help or -h.
+  if (parsed_command_line.HasSwitch(L"help") ||
+      parsed_command_line.HasSwitch(L"h")) {
+    FilePath binary(parsed_command_line.argv()[0]);
+    int ret = execlp("man", "man", binary.BaseName().value().c_str(), NULL);
+    LOG(FATAL) << "execlp failed: " << strerror(ret);
+  }
+#endif
+
 #if defined(OS_POSIX)
   // Always ignore SIGPIPE.  We check the return value of write().
   CHECK(signal(SIGPIPE, SIG_IGN) != SIG_ERR);
-- 
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