Avoid a crash on NetBSD when not every minion is present

From the pull request pending, #31320:

  On NetBSD, Salt currently defaults to using lsof(8) to determine which
  minions are connected. It is however not always available, and even
  then quite unreliable. I found that just like on FreeBSD, sockstat(1)
  is a much safer alternative. Unfortunately its output is not exactly
  the same on NetBSD, where the port delimiter is a dot character
  instead. As a consequence I have decided to duplicate the relevant
  function for NetBSD; let me know if I should try to re-use the code
  supporting FreeBSD instead.

See also https://github.com/saltstack/salt/pull/31230.

3 files changed, 114 insertions, 3 deletions

diff --git a/sysutils/salt/patches/patch-salt_modules_status.py b/sysutils/salt/patches/patch-salt_modules_status.py
index 067a07b7bf7..c2a6615a942 100644
--- a/sysutils/salt/patches/patch-salt_modules_status.py
+++ b/sysutils/salt/patches/patch-salt_modules_status.py
@@ -1,10 +1,10 @@
-$NetBSD: patch-salt_modules_status.py,v 1.1 2016/02/04 22:05:36 khorben Exp $
+$NetBSD: patch-salt_modules_status.py,v 1.2 2016/02/16 01:52:34 khorben Exp $
 
 Avoid a crash in "status.diskusage" when not on Linux or FreeBSD
 
---- salt/modules/status.py.orig	2016-02-04 21:56:06.000000000 +0000
+--- salt/modules/status.py.orig	2016-02-01 19:40:31.000000000 +0000
 +++ salt/modules/status.py
-@@ -443,6 +443,8 @@ def diskusage(*args):
+@@ -457,6 +457,8 @@ def diskusage(*args):
              ifile = salt.utils.fopen(procf, 'r').readlines()
          elif __grains__['kernel'] == 'FreeBSD':
              ifile = __salt__['cmd.run']('mount -p').splitlines()
diff --git a/sysutils/salt/patches/patch-salt_utils_____init____.py b/sysutils/salt/patches/patch-salt_utils_____init____.py
new file mode 100644
index 00000000000..b7bb7d2f8cb
--- /dev/null
+++ b/sysutils/salt/patches/patch-salt_utils_____init____.py
@@ -0,0 +1,21 @@
+$NetBSD: patch-salt_utils_____init____.py,v 1.1 2016/02/16 01:52:34 khorben Exp $
+
+Use sockstat(1) on NetBSD
+
+--- salt/utils/__init__.py.orig	2016-02-01 19:40:31.000000000 +0000
++++ salt/utils/__init__.py
+@@ -1664,6 +1664,14 @@ def is_freebsd():
+ 
+ 
+ @real_memoize
++def is_netbsd():
++    '''
++    Simple function to return if host is NetBSD or not
++    '''
++    return sys.platform.startswith('netbsd')
++
++
++@real_memoize
+ def is_openbsd():
+     '''
+     Simple function to return if host is OpenBSD or not
diff --git a/sysutils/salt/patches/patch-salt_utils_network.py b/sysutils/salt/patches/patch-salt_utils_network.py
new file mode 100644
index 00000000000..396f15911e4
--- /dev/null
+++ b/sysutils/salt/patches/patch-salt_utils_network.py
@@ -0,0 +1,90 @@
+$NetBSD: patch-salt_utils_network.py,v 1.1 2016/02/16 01:52:34 khorben Exp $
+
+Use sockstat(1) on NetBSD
+
+--- salt/utils/network.py.orig	2016-02-01 19:40:31.000000000 +0000
++++ salt/utils/network.py
+@@ -1180,6 +1180,65 @@ def _freebsd_remotes_on(port, which_end)
+     return remotes
+ 
+ 
++def _netbsd_remotes_on(port, which_end):
++    '''
++    Returns set of ipv4 host addresses of remote established connections
++    on local tcp port port.
++
++    Parses output of shell 'sockstat' (FreeBSD)
++    to get connections
++
++    $ sudo sockstat -4
++    USER    COMMAND     PID     FD  PROTO  LOCAL ADDRESS    FOREIGN ADDRESS
++    root    python2.7   1456    29  tcp4   *.4505           *.*
++    root    python2.7   1445    17  tcp4   *.4506           *.*
++    root    python2.7   1294    14  tcp4   127.0.0.1.11813  127.0.0.1.4505
++    root    python2.7   1294    41  tcp4   127.0.0.1.61115  127.0.0.1.4506
++
++    $ sudo sockstat -4 -c -p 4506
++    USER    COMMAND     PID     FD  PROTO  LOCAL ADDRESS    FOREIGN ADDRESS
++    root    python2.7   1294    41  tcp4   127.0.0.1.61115  127.0.0.1.4506
++    '''
++
++    port = int(port)
++    remotes = set()
++
++    try:
++        cmd = shlex.split('sockstat -4 -c -p {0}'.format(port))
++        data = subprocess.check_output(cmd)  # pylint: disable=minimum-python-version
++    except subprocess.CalledProcessError as ex:
++        log.error('Failed "sockstat" with returncode = {0}'.format(ex.returncode))
++        raise
++
++    lines = salt.utils.to_str(data).split('\n')
++
++    for line in lines:
++        chunks = line.split()
++        if not chunks:
++            continue
++        # ['root', 'python2.7', '1456', '37', 'tcp4',
++        #  '127.0.0.1.4505-', '127.0.0.1.55703']
++        #print chunks
++        if 'COMMAND' in chunks[1]:
++            continue  # ignore header
++        if len(chunks) < 2:
++            continue
++        local = chunks[5].split('.')
++        lport = local.pop()
++        lhost = '.'.join(local)
++        remote = chunks[6].split('.')
++        rport = remote.pop()
++        rhost = '.'.join(remote)
++        if which_end == 'local' and int(lport) != port:  # ignore if local port not port
++            continue
++        if which_end == 'remote' and int(rport) != port:  # ignore if remote port not port
++            continue
++
++        remotes.add(rhost)
++
++    return remotes
++
++
+ def _openbsd_remotes_on(port, which_end):
+     '''
+     OpenBSD specific helper function.
+@@ -1277,6 +1336,8 @@ def remotes_on_local_tcp_port(port):
+         return _sunos_remotes_on(port, 'local_port')
+     if salt.utils.is_freebsd():
+         return _freebsd_remotes_on(port, 'local_port')
++    if salt.utils.is_netbsd():
++        return _netbsd_remotes_on(port, 'local_port')
+     if salt.utils.is_openbsd():
+         return _openbsd_remotes_on(port, 'local_port')
+     if salt.utils.is_windows():
+@@ -1332,6 +1393,8 @@ def remotes_on_remote_tcp_port(port):
+         return _sunos_remotes_on(port, 'remote_port')
+     if salt.utils.is_freebsd():
+         return _freebsd_remotes_on(port, 'remote_port')
++    if salt.utils.is_netbsd():
++        return _netbsd_remotes_on(port, 'remote_port')
+     if salt.utils.is_openbsd():
+         return _openbsd_remotes_on(port, 'remote_port')
+     if salt.utils.is_windows():