Merge pull request #5207 from ssaraswati/feature/no-ps-remote-picker

Add a fallback for ps in remoteProcessPickerScript

Author: JoeRobich

scripts/remoteProcessPickerScript

@@ -1 +1,34 @@
-uname && if [ "$(uname)" = "Linux" ] ; then ps -axww -o pid=,flags=,comm=aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa,args= ; exit; elif [ "$(uname)" = "Darwin" ] ; then ps -axww -o pid=,flags=,comm=aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa,args= -c; fi
+#!/bin/sh
+uname && if [ "$(uname)" = "Linux" ]; then
+    # check if ps exists and can be run on the current target with our selected options, flags is not supported in all ps implementations
+    ps -axww -o pid=,flags=,comm=aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa,args= >/dev/null 2>/dev/null
+    ret=$?
+    if [ $ret -eq 0 ]; then
+        ps -axww -o pid=,flags=,comm=aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa,args=
+    else
+        # if ps doesn't support the options we are after try and read from /proc/$pid
+        # Try to mimic the output of ps -axww -o pid=,flags=,comm=aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa,args= from /proc/$pid/ data
+        echo "        aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa"
+        for pid in `cd /proc && ls -d [0-9]*`
+            do {
+                if [ -e /proc/$pid/stat ]
+                then
+                    # read values from stat file, directory name matches the pid of each process running
+                    # item 9 kernel flag words of the process, item 2 is the process file name, man proc has more details
+                    flags=`awk '{print $9}' /proc/$pid/stat`;
+                    command=`awk '{print $2}' /proc/$pid/stat | tr -d '()'`
+
+                    # read the process command line used to start the process, 
+                    # take the second item for display as argument passed 
+                    args=`xargs -0 < /proc/$pid/cmdline | awk '{print $2}'`;
+
+                    # write values in a format with similar spacing to procps-ng/procps ps
+                    # pid 5 spaces with padding right align, flags 1 char, 
+                    # command uses space size of the input of 50 a's -1 from heading left align, args 27 left align
+                    printf "%5s %.1s %-49s %-27s \n\r" $pid $flags $command $args
+                fi
+            };
+        done
+    fi
+
+elif [ "$(uname)" = "Darwin" ]; then ps -axww -o pid=,flags=,comm=aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa,args= -c; fi