Adding upstream version 1:9.11.5.P4+dfsg.upstream/1%9.11.5.P4+dfsgupstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 324 insertions, 0 deletions

diff --git a/unit/atf-src/tools/process.hpp b/unit/atf-src/tools/process.hpp
new file mode 100644
index 0000000..2ebd865
--- /dev/null
+++ b/unit/atf-src/tools/process.hpp
@@ -0,0 +1,324 @@
+//
+// Automated Testing Framework (atf)
+//
+// Copyright (c) 2008 The NetBSD Foundation, Inc.
+// All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions
+// are met:
+// 1. Redistributions of source code must retain the above copyright
+//    notice, this list of conditions and the following disclaimer.
+// 2. Redistributions in binary form must reproduce the above copyright
+//    notice, this list of conditions and the following disclaimer in the
+//    documentation and/or other materials provided with the distribution.
+//
+// THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND
+// CONTRIBUTORS ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
+// INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+// MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+// IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS BE LIABLE FOR ANY
+// DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+// DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
+// GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
+// IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
+// OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
+// IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+//
+
+#if !defined(TOOLS_PROCESS_HPP)
+#define TOOLS_PROCESS_HPP
+
+extern "C" {
+#include <sys/types.h>
+
+#include <unistd.h>
+}
+
+#include <cerrno>
+#include <cstdlib>
+#include <iostream>
+#include <string>
+#include <vector>
+
+#include "auto_array.hpp"
+#include "exceptions.hpp"
+#include "fs.hpp"
+
+namespace tools {
+namespace process {
+
+class child;
+class status;
+
+// ------------------------------------------------------------------------
+// The "argv_array" type.
+// ------------------------------------------------------------------------
+
+class argv_array {
+    typedef std::vector< std::string > args_vector;
+    args_vector m_args;
+
+    // TODO: This is immutable, so we should be able to use
+    // std::tr1::shared_array instead when it becomes widely available.
+    // The reason would be to remove all copy constructors and assignment
+    // operators from this class.
+    auto_array< const char* > m_exec_argv;
+    void ctor_init_exec_argv(void);
+
+public:
+    typedef args_vector::const_iterator const_iterator;
+    typedef args_vector::size_type size_type;
+
+    argv_array(void);
+    argv_array(const char*, ...);
+    explicit argv_array(const char* const*);
+    template< class C > explicit argv_array(const C&);
+    argv_array(const argv_array&);
+
+    const char* const* exec_argv(void) const;
+    size_type size(void) const;
+    const char* operator[](int) const;
+
+    const_iterator begin(void) const;
+    const_iterator end(void) const;
+
+    argv_array& operator=(const argv_array&);
+};
+
+template< class C >
+argv_array::argv_array(const C& c)
+{
+    for (typename C::const_iterator iter = c.begin(); iter != c.end();
+         iter++)
+        m_args.push_back(*iter);
+    ctor_init_exec_argv();
+}
+
+// ------------------------------------------------------------------------
+// The "stream" types.
+// ------------------------------------------------------------------------
+
+class stream_capture {
+    int m_pipefds[2];
+
+    // Allow access to the getters.
+    template< class OutStream, class ErrStream > friend
+    child fork(void (*)(void*), OutStream, ErrStream, void*);
+    template< class OutStream, class ErrStream > friend
+    status exec(const tools::fs::path&, const argv_array&,
+                const OutStream&, const ErrStream&, void (*)(void));
+
+    void prepare(void);
+    int connect_parent(void);
+    void connect_child(const int);
+
+public:
+    stream_capture(void);
+    ~stream_capture(void);
+};
+
+class stream_connect {
+    int m_src_fd;
+    int m_tgt_fd;
+
+    // Allow access to the getters.
+    template< class OutStream, class ErrStream > friend
+    child fork(void (*)(void*), OutStream, ErrStream, void*);
+    template< class OutStream, class ErrStream > friend
+    status exec(const tools::fs::path&, const argv_array&,
+                const OutStream&, const ErrStream&, void (*)(void));
+
+    void prepare(void);
+    int connect_parent(void);
+    void connect_child(const int);
+
+public:
+    stream_connect(const int, const int);
+};
+
+class stream_inherit {
+    // Allow access to the getters.
+    template< class OutStream, class ErrStream > friend
+    child fork(void (*)(void*), OutStream, ErrStream, void*);
+    template< class OutStream, class ErrStream > friend
+    status exec(const tools::fs::path&, const argv_array&,
+                const OutStream&, const ErrStream&, void (*)(void));
+
+    void prepare(void);
+    int connect_parent(void);
+    void connect_child(const int);
+
+public:
+    stream_inherit(void);
+};
+
+class stream_redirect_fd {
+    int m_fd;
+
+    // Allow access to the getters.
+    template< class OutStream, class ErrStream > friend
+    child fork(void (*)(void*), OutStream, ErrStream, void*);
+    template< class OutStream, class ErrStream > friend
+    status exec(const tools::fs::path&, const argv_array&,
+                const OutStream&, const ErrStream&, void (*)(void));
+
+    void prepare(void);
+    int connect_parent(void);
+    void connect_child(const int);
+
+public:
+    stream_redirect_fd(const int);
+};
+
+class stream_redirect_path {
+    const tools::fs::path m_path;
+
+    // Allow access to the getters.
+    template< class OutStream, class ErrStream > friend
+    child fork(void (*)(void*), OutStream, ErrStream, void*);
+    template< class OutStream, class ErrStream > friend
+    status exec(const tools::fs::path&, const argv_array&,
+                const OutStream&, const ErrStream&, void (*)(void));
+
+    void prepare(void);
+    int connect_parent(void);
+    void connect_child(const int);
+
+public:
+    stream_redirect_path(const tools::fs::path&);
+};
+
+// ------------------------------------------------------------------------
+// The "status" type.
+// ------------------------------------------------------------------------
+
+class status {
+    int m_status;
+
+    friend class child;
+    template< class OutStream, class ErrStream > friend
+    status exec(const tools::fs::path&, const argv_array&,
+                const OutStream&, const ErrStream&, void (*)(void));
+
+    status(int);
+
+public:
+    ~status(void);
+
+    bool exited(void) const;
+    int exitstatus(void) const;
+
+    bool signaled(void) const;
+    int termsig(void) const;
+    bool coredump(void) const;
+};
+
+// ------------------------------------------------------------------------
+// The "child" type.
+// ------------------------------------------------------------------------
+
+class child {
+    pid_t m_pid;
+
+    int m_stdout;
+    int m_stderr;
+
+    bool m_waited;
+
+    template< class OutStream, class ErrStream > friend
+    child fork(void (*)(void*), OutStream, ErrStream, void*);
+
+    child(const pid_t, const int, const int);
+
+public:
+    ~child(void);
+
+    status wait(void);
+
+    pid_t pid(void) const;
+    int stdout_fd(void);
+    int stderr_fd(void);
+};
+
+// ------------------------------------------------------------------------
+// Free functions.
+// ------------------------------------------------------------------------
+
+namespace detail {
+void flush_streams(void);
+
+struct exec_args {
+    const tools::fs::path m_prog;
+    const argv_array& m_argv;
+    void (*m_prehook)(void);
+};
+
+void do_exec(void *);
+} // namespace detail
+
+// TODO: The void* cookie can probably be templatized, thus also allowing
+// const data structures.
+template< class OutStream, class ErrStream >
+child
+fork(void (*start)(void*), OutStream outsb, ErrStream errsb, void* v)
+{
+    detail::flush_streams();
+
+    outsb.prepare();
+    errsb.prepare();
+
+    pid_t pid = ::fork();
+    if (pid == -1) {
+        throw system_error("tools::process::child::fork",
+                           "Failed to fork", errno);
+    } else if (pid == 0) {
+        try {
+            outsb.connect_child(STDOUT_FILENO);
+            errsb.connect_child(STDERR_FILENO);
+            start(v);
+            std::abort();
+        } catch (...) {
+            std::cerr << "Unhandled error while running subprocess\n";
+            std::exit(EXIT_FAILURE);
+        }
+    } else {
+        const int stdout_fd = outsb.connect_parent();
+        const int stderr_fd = errsb.connect_parent();
+        return child(pid, stdout_fd, stderr_fd);
+    }
+}
+
+template< class OutStream, class ErrStream >
+status
+exec(const tools::fs::path& prog, const argv_array& argv,
+     const OutStream& outsb, const ErrStream& errsb,
+     void (*prehook)(void))
+{
+    struct detail::exec_args ea = { prog, argv, prehook };
+    child c = fork(detail::do_exec, outsb, errsb, &ea);
+
+again:
+    try {
+        return c.wait();
+    } catch (const system_error& e) {
+        if (e.code() == EINTR)
+            goto again;
+        else
+            throw e;
+    }
+}
+
+template< class OutStream, class ErrStream >
+status
+exec(const tools::fs::path& prog, const argv_array& argv,
+     const OutStream& outsb, const ErrStream& errsb)
+{
+    return exec(prog, argv, outsb, errsb, NULL);
+}
+
+} // namespace process
+} // namespace tools
+
+#endif // !defined(TOOLS_PROCESS_HPP)