Danack · February 25, 2020 03:28 · Nov 20, 2014 · Nov 20, 2014
diff --git a/gistfile1.sh → batchStrace b/gistfile1.sh → batchStrace
diff --git a/gistfile1.sh b/gistfile1.sh
@@ -0,0 +1,63 @@
+#!/bin/bash
+
+# Prevent strace from abbreviating arguments?
+# You want the -s strsize option, which specifies the maximum length of a string to display (the default is 32).
+
+
+
+# -etrace=!open means to trace every system call except open. In addition, the special values all and none have the obvious meanings.
+#-etrace=!open
+#-e trace=!write.
+
+# -s strsize
+# Specify the maximum string size to print (the default is 32). Note that 
+# filenames are not considered strings and are always printed in full.
+
+rm -rf trc/*.trc
+
+#this check doesn't work, as the script gives a compile error before it's run.
+if [[ ! $BASH ]]
+then
+  echo "This script needs to run in bash, not sh."
+  exit -1
+fi
+
+additional_strace_args="$1"
+
+mkdir trc
+
+MASTER_PID=$(ps auwx | grep php-fpm | grep -v grep | grep 'master process'  | cut -d ' ' -f 7)
+
+# ls -l /tmp/foobar | awk '{print $1"\t"$9}'
+# This code takes some input, such as this:
+# -rw-rw-rw-   1 root     root            1 Jul 14  1997 tmpmsg
+# and generates output like this:
+# -rw-rw-rw-      tmpmsg
+
+
+summarise=""
+
+#comment in to show total of calls
+#summarise="-c"
+
+
+nohup strace -r $summarise -p $MASTER_PID -ff -o ./trc/master.follow.trc >"trc/master.$MASTER_PID.trc" 2>&1 &
+
+while read -r pid;
+do
+	if [[ $pid != $MASTER_PID ]]; then
+
+	    #shows individual calls
+            #nohup strace -r -p "$pid" $additional_strace_args >"trc/$pid.trc" 2>&1 &
+
+		#shows total of calls
+		nohup strace -r $summarise -p "$pid" $additional_strace_args >"trc/$pid.summary.trc" 2>&1 &
+	fi
+done < <(pgrep php-fpm)
+
+#This needs bash not SH
+
+read -p "Strace running - press [Enter] to stop"
+
+pkill strace
+