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x2go pushed a commit to branch bugfix/osx
in repository x2goclient.

commit 2de3c118573e96578456d16aa3c38ca781ab661b
Author: Mihai Moldovan <io...@ionic.de>
Date:   Mon Mar 16 23:08:13 2015 +0100

    unixhelper.cpp: port from std::signal() to sigaction(). Handle errors.
---
 debian/changelog   |    1 +
 src/unixhelper.cpp |   33 ++++++++++++++++++++++++++-------
 2 files changed, 27 insertions(+), 7 deletions(-)

diff --git a/debian/changelog b/debian/changelog
index 6dd8c2c..bca7f5c 100644
--- a/debian/changelog
+++ b/debian/changelog
@@ -32,6 +32,7 @@ x2goclient (4.0.5.3-0x2go1) UNRELEASED; urgency=medium
     - unixhelper.cpp: kill process group on error.
     - unixhelper.{cpp,h}: implement signal unblocking in
       unixhelper::unix_cleanup(). Update documentation.
+    - unixhelper.cpp: port from std::signal() to sigaction(). Handle errors.
 
  -- X2Go Release Manager <git-ad...@x2go.org>  Mon, 19 Sep 2016 09:07:07 +0200
 
diff --git a/src/unixhelper.cpp b/src/unixhelper.cpp
index f2cc11c..fdcaac9 100644
--- a/src/unixhelper.cpp
+++ b/src/unixhelper.cpp
@@ -69,15 +69,34 @@ namespace unixhelper {
       /* Anything here shall be unreachable. */
     }
 
-    /* Set up signal handler to ignore SIGTERM. */
-    if (SIG_ERR == std::signal (SIGTERM, SIG_IGN)) {
-      std::cerr << "Unable to ignore SIGTERM: " << std::strerror (errno) << 
std::endl;
-      std::exit (1);
-
-      /* Anything here shall be unreachable. */
+    {
+      struct sigaction sig_action;
+      sig_action.sa_handler = SIG_IGN;
+      sig_action.sa_mask = empty_set;
+      sig_action.sa_flags = SA_RESTART;
+
+      /* Set up signal handler to ignore SIGTERM. */
+      if (0 != sigaction (SIGTERM, &sig_action, NULL)) {
+        std::cerr << "Unable to ignore SIGTERM: " << std::strerror (errno) << 
std::endl;
+        kill_pgroup (-1);
+
+        /* Anything here shall be unreachable. */
+      }
     }
 
-    std::signal (SIGHUP, kill_pgroup);
+    {
+      struct sigaction sig_action;
+      sig_action.sa_handler = kill_pgroup;
+      sig_action.sa_mask = empty_set;
+      sig_action.sa_flags = SA_RESTART;
+
+      if (0 != sigaction (SIGHUP, &sig_action, NULL)) {
+        std::cerr << "Unable to set up signal handler for SIGHUP: " << 
std::strerror (errno) << std::endl;
+        kill_pgroup (-1);
+
+        /* Anything here shall be unreachable. */
+      }
+    }
 
     /* Sleep forever... at least one second in each run. */
     for (;;) {

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