1 files changed, 98 insertions, 0 deletions
diff --git a/apt-private/private-utils.cc b/apt-private/private-utils.cc
new file mode 100644
index 000000000..5863925b9
--- /dev/null
+++ b/apt-private/private-utils.cc
@@ -0,0 +1,98 @@
+#include <config.h>
+
+#include <apt-pkg/configuration.h>
+#include <apt-pkg/error.h>
+#include <apt-pkg/fileutl.h>
+
+#include <apt-private/private-utils.h>
+
+#include <cstdlib>
+#include <sstream>
+#include <unistd.h>
+
+// DisplayFileInPager - Display File with pager				/*{{{*/
+bool DisplayFileInPager(std::string const &filename)
+{
+   pid_t Process = ExecFork();
+   if (Process == 0)
+   {
+      const char *Args[3];
+      Args[1] = filename.c_str();
+      Args[2] = NULL;
+      if (isatty(STDOUT_FILENO) == 1)
+      {
+	 // likely installed, provided by sensible-utils
+	 std::string const pager = _config->Find("Dir::Bin::Pager",
+	       "sensible-pager");
+	 Args[0] = pager.c_str();
+	 execvp(Args[0],(char **)Args);
+	 // lets try some obvious alternatives
+	 Args[0] = getenv("PAGER");
+	 if (Args[0] != NULL)
+	    execvp(Args[0],(char **)Args);
+
+	 Args[0] = "pager";
+	 execvp(Args[0],(char **)Args);
+      }
+      // we could read the file ourselves, but… meh
+      Args[0] = "cat";
+      execvp(Args[0],(char **)Args);
+      exit(100);
+   }
+
+   // Wait for the subprocess
+   return ExecWait(Process, "pager", false);
+}
+									/*}}}*/
+// EditFileInSensibleEditor - Edit File with editor			/*{{{*/
+bool EditFileInSensibleEditor(std::string const &filename)
+{
+   pid_t Process = ExecFork();
+   if (Process == 0)
+   {
+      // likely installed, provided by sensible-utils
+      std::string const editor = _config->Find("Dir::Bin::Editor",
+	    "sensible-editor");
+      const char *Args[3];
+      Args[0] = editor.c_str();
+      Args[1] = filename.c_str();
+      Args[2] = NULL;
+      execvp(Args[0],(char **)Args);
+      // the usual suspects we can try as an alternative
+      Args[0] = getenv("VISUAL");
+      if (Args[0] != NULL)
+	 execvp(Args[0],(char **)Args);
+
+      Args[0] = getenv("EDITOR");
+      if (Args[0] != NULL)
+	 execvp(Args[0],(char **)Args);
+
+      Args[0] = "editor";
+      execvp(Args[0],(char **)Args);
+      exit(100);
+   }
+
+   // Wait for the subprocess
+   return ExecWait(Process, "editor", false);
+}
+									/*}}}*/
+time_t GetSecondsSinceEpoch()						/*{{{*/
+{
+   auto const source_date_epoch = getenv("SOURCE_DATE_EPOCH");
+   if (source_date_epoch == nullptr)
+      return time(nullptr);
+
+   time_t epoch;
+   std::stringstream ss(source_date_epoch);
+   ss >> epoch;
+
+   if (ss.fail() || !ss.eof())
+   {
+      _error->Warning("Environment variable SOURCE_DATE_EPOCH was ignored as it has an invalid value: \"%s\"",
+            source_date_epoch);
+      return time(nullptr);
+   }
+
+   return epoch;
+}
+									/*}}}*/