From f5748e36b3593226229df2b1cc3b4b51b698a79e Mon Sep 17 00:00:00 2001
From: AJIOB <aleksandr9809@gmail.com>
Date: Mon, 22 Dec 2025 10:18:10 +0300
Subject: [PATCH] Fix `/dev/fd` not found error

---
 .../boost/process/v1/detail/posix/handles.hpp  | 18 +++++++++++++-----
 src/posix/close_handles.cpp                    |  8 ++++++--
 2 files changed, 19 insertions(+), 7 deletions(-)

diff --git a/include/boost/process/v1/detail/posix/handles.hpp b/include/boost/process/v1/detail/posix/handles.hpp
index bd1b498e4..e87cc5f52 100644
--- a/include/boost/process/v1/detail/posix/handles.hpp
+++ b/include/boost/process/v1/detail/posix/handles.hpp
@@ -27,8 +27,12 @@ inline std::vector<native_handle_type> get_handles(std::error_code & ec)
     std::unique_ptr<DIR, void(*)(DIR*)> dir{::opendir("/dev/fd"), +[](DIR* p){::closedir(p);}};
     if (!dir)
     {
-        ec = ::boost::process::v1::detail::get_last_error();
-        return {};
+        dir = {::opendir("/proc/self/fd"), +[](DIR* p){::closedir(p);}};
+        if (!dir)
+        {
+            ec = ::boost::process::v1::detail::get_last_error();
+            return {};
+        }
     }
     else
         ec.clear();
@@ -60,7 +64,7 @@ inline std::vector<native_handle_type> get_handles()
 
     auto res = get_handles(ec);
     if (ec)
-        boost::process::v1::detail::throw_error(ec, "open_dir(\"/dev/fd\") failed");
+        boost::process::v1::detail::throw_error(ec, "open_dir(\"/dev/fd\") and open_dir(\"/proc/self/fd\") failed");
 
     return res;
 }
@@ -113,8 +117,12 @@ struct limit_handles_ : handler_base_ext
         auto dir = ::opendir("/dev/fd");
         if (!dir)
         {
-            exec.set_error(::boost::process::v1::detail::get_last_error(), "opendir(\"/dev/fd\")");
-            return;
+            dir = ::opendir("/proc/self/fd");
+            if (!dir)
+            {
+                exec.set_error(::boost::process::v1::detail::get_last_error(), "opendir(\"/proc/self/fd\")");
+                return;
+            }
         }
 
         auto my_fd = dirfd(dir);
diff --git a/src/posix/close_handles.cpp b/src/posix/close_handles.cpp
index 5795a3b1c..b29b73e0c 100644
--- a/src/posix/close_handles.cpp
+++ b/src/posix/close_handles.cpp
@@ -181,8 +181,12 @@ void close_all(const std::vector<int> & whitelist, error_code & ec)
     std::unique_ptr<DIR, void(*)(DIR*)> dir{::opendir("/dev/fd"), +[](DIR* p){::closedir(p);}};
     if (dir.get() == nullptr)
     {
-        ec = BOOST_PROCESS_V2_NAMESPACE::detail::get_last_error();
-        return ;
+        dir = {::opendir("/proc/self/fd"), +[](DIR* p){::closedir(p);}};
+        if (dir.get() == nullptr)
+        {
+            ec = BOOST_PROCESS_V2_NAMESPACE::detail::get_last_error();
+            return ;
+        }
     }
 
     auto dir_fd = dirfd(dir.get());