From 24b3afa684e57176f5068fd5896679ae0fa047ad Mon Sep 17 00:00:00 2001
From: Roland Reichwein <mail@reichwein.it>
Date: Mon, 9 Jan 2023 11:29:22 +0100
Subject: Add process.h: is_running()

---
 Makefile               | 41 ++++++++++++++++++++++++++++++++++++++++-
 debian/changelog       |  6 ++++++
 debian/control         |  2 +-
 process.cpp            | 27 +++++++++++++++++++++++++++
 process.h              |  7 +++++++
 tests/Makefile         |  5 +++++
 tests/test-process.cpp | 34 ++++++++++++++++++++++++++++++++++
 7 files changed, 120 insertions(+), 2 deletions(-)
 create mode 100644 process.cpp
 create mode 100644 process.h
 create mode 100644 tests/test-process.cpp

diff --git a/Makefile b/Makefile
index d7cbabb..2f30ad3 100644
--- a/Makefile
+++ b/Makefile
@@ -23,6 +23,7 @@ PROGSRC=\
     file.cpp \
     mime.cpp \
     os.cpp \
+    process.cpp \
     stringhelper.cpp \
     tempfile.cpp \
     url.cpp
@@ -90,7 +91,45 @@ ADD_DEP=Makefile
 DISTFILES=$(shell git ls-files 2>/dev/null)
 ifeq ($(DISTFILES),)
 DISTFILES= \
-
+Makefile \
+archive.h \
+base64.cpp \
+base64.h \
+common.mk \
+debian/README.Debian \
+debian/changelog \
+debian/compat \
+debian/control \
+debian/copyright \
+debian/libreichwein-dev.install \
+debian/libreichwein0.install \
+debian/rules \
+debian/source/format \
+file.cpp \
+file.h \
+mime.cpp \
+mime.h \
+os.cpp \
+os.h \
+process.cpp \
+process.h \
+remote-install.sh \
+stringhelper.cpp \
+stringhelper.h \
+tempfile.cpp \
+tempfile.h \
+tests/Makefile \
+tests/test-archive.cpp \
+tests/test-base64.cpp \
+tests/test-file.cpp \
+tests/test-mime.cpp \
+tests/test-os.cpp \
+tests/test-process.cpp \
+tests/test-stringhelper.cpp \
+tests/test-tempfile.cpp \
+tests/test-url.cpp \
+url.cpp \
+url.h
 endif
 
 dist: clean
diff --git a/debian/changelog b/debian/changelog
index 1752e59..9c72966 100644
--- a/debian/changelog
+++ b/debian/changelog
@@ -1,3 +1,9 @@
+libreichwein (1.2) UNRELEASED; urgency=medium
+
+  * Added process.h+cpp: Reichwein::Process::is_running()
+
+ -- Roland Reichwein <mail@reichwein.it>  Sat, 07 Jan 2023 19:15:07 +0100
+
 libreichwein (1.1) unstable; urgency=medium
 
   * Shared and static lib
diff --git a/debian/control b/debian/control
index 7e9d5cd..83988c8 100644
--- a/debian/control
+++ b/debian/control
@@ -2,7 +2,7 @@ Source: libreichwein
 Section: devel
 Priority: optional
 Maintainer: Roland Reichwein <mail@reichwein.it>
-Build-Depends: debhelper (>= 12), libboost-all-dev | libboost1.71-all-dev, clang | g++-9, llvm | g++-9, lld | g++-9, pkg-config, googletest, gcovr
+Build-Depends: debhelper (>= 12), libboost-all-dev | libboost1.71-all-dev, clang | g++-9, llvm | g++-9, lld | g++-9, googletest, gcovr
 Standards-Version: 4.5.0
 Homepage: http://www.reichwein.it/libreichwein/
 
diff --git a/process.cpp b/process.cpp
new file mode 100644
index 0000000..b30ef3d
--- /dev/null
+++ b/process.cpp
@@ -0,0 +1,27 @@
+#include "process.h"
+
+#include <filesystem>
+#include <string>
+
+#include "file.h"
+
+namespace fs = std::filesystem;
+
+bool Reichwein::Process::is_running(pid_t pid)
+{
+  fs::path pid_file{"/proc/" + std::to_string(pid) + "/stat"};
+  if (!fs::exists(pid_file))
+   return false;
+
+  std::string s{Reichwein::File::getFile(pid_file)};
+
+  auto pos0{s.find(' ', 0)};
+  pos0 = s.find(' ', pos0 + 1);
+  pos0++;
+
+  auto pos1{s.find(' ', pos0 + 1)};
+
+  std::string state{s.substr(pos0, pos1 - pos0)};
+
+  return state == "R" || state == "S";
+}
diff --git a/process.h b/process.h
new file mode 100644
index 0000000..a47dd6c
--- /dev/null
+++ b/process.h
@@ -0,0 +1,7 @@
+#pragma once
+
+#include <sys/types.h>
+
+namespace Reichwein::Process {
+ bool is_running(pid_t pid);
+} // namespace
diff --git a/tests/Makefile b/tests/Makefile
index 6ae6f12..b95c91a 100644
--- a/tests/Makefile
+++ b/tests/Makefile
@@ -16,6 +16,7 @@ UNITS=\
 	file.cpp \
 	mime.cpp \
 	os.cpp \
+	process.cpp \
 	stringhelper.cpp \
 	tempfile.cpp \
 	url.cpp
@@ -26,6 +27,7 @@ UNITTESTS=\
 	test-file.cpp \
 	test-mime.cpp \
 	test-os.cpp \
+	test-process.cpp \
 	test-stringhelper.cpp \
 	test-tempfile.cpp \
 	test-url.cpp
@@ -69,6 +71,9 @@ mime.o: ../mime.cpp
 os.o: ../os.cpp
 	$(CXX) $(CXXFLAGS) -o $@ -c $<
 
+process.o: ../process.cpp
+	$(CXX) $(CXXFLAGS) -o $@ -c $<
+
 stringhelper.o: ../stringhelper.cpp
 	$(CXX) $(CXXFLAGS) -o $@ -c $<
 
diff --git a/tests/test-process.cpp b/tests/test-process.cpp
new file mode 100644
index 0000000..dfee83f
--- /dev/null
+++ b/tests/test-process.cpp
@@ -0,0 +1,34 @@
+#include <gtest/gtest.h>
+
+#include "process.h"
+
+#include <unistd.h>
+
+class ProcessTest: public ::testing::Test
+{
+protected:
+ ProcessTest(){
+ }
+
+ ~ProcessTest() override{
+ }
+
+ void SetUp() override
+ {
+ }
+
+ void TearDown() override
+ {
+ }
+
+};
+
+TEST_F(ProcessTest,is_running) {
+ auto pid{::getpid()};
+
+ EXPECT_NE(pid, -1);
+
+ EXPECT_EQ(Reichwein::Process::is_running(pid), true);
+
+ EXPECT_EQ(Reichwein::Process::is_running(999999999), false);
+}
-- 
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