usr/src/cmd/dtrace/test/tst/common/proc/tst.execfail.ksh

   1 #
   2 # CDDL HEADER START
   3 #
   4 # The contents of this file are subject to the terms of the
   5 # Common Development and Distribution License (the "License").
   6 # You may not use this file except in compliance with the License.
   7 #
   8 # You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
   9 # or http://www.opensolaris.org/os/licensing.
  10 # See the License for the specific language governing permissions
  11 # and limitations under the License.
  12 #
  13 # When distributing Covered Code, include this CDDL HEADER in each
  14 # file and include the License file at usr/src/OPENSOLARIS.LICENSE.
  15 # If applicable, add the following below this CDDL HEADER, with the
  16 # fields enclosed by brackets "[]" replaced with your own identifying
  17 # information: Portions Copyright [yyyy] [name of copyright owner]
  18 #
  19 # CDDL HEADER END
  20 #
  21
  22 #
  23 # Copyright 2007 Sun Microsystems, Inc.  All rights reserved.
  24 # Use is subject to license terms.
  25 #
  26 # ident "%Z%%M% %I%     %E% SMI"
  27
  28 #
  29 # This script tests that -- if a exec(2) fails -- the proc:::exec probe fires,
  30 # followed by the proc:::exec-success probe (in a successful exec(2)).  To
  31 # circumvent any potential shell cleverness, this script generates exec
  32 # failure by generating a file with a bogus interpreter.  (It seems unlikely
  33 # that a shell -- regardless of how clever it claims to be -- would bother to
  34 # validate the interpreter before exec'ing.)
  35 #
  36 # If this fails, the script will run indefinitely; it relies on the harness
  37 # to time it out.
  38 #
  39 script()
  40 {
  41         $dtrace -s /dev/stdin <<EOF
  42         proc:::exec
  43         /curpsinfo->pr_ppid == $child && args[0] == "$badexec"/
  44         {
  45                 self->exec = 1;
  46         }
  47
  48         proc:::exec-failure
  49         /self->exec/
  50         {
  51                 exit(0);
  52         }
  53 EOF
  54 }
  55
  56 sleeper()
  57 {
  58         while true; do
  59                 /usr/bin/sleep 1
  60                 $badexec
  61         done
  62 }
  63
  64 if [ $# != 1 ]; then
  65         echo expected one argument: '<'dtrace-path'>'
  66         exit 2
  67 fi
  68
  69 badexec=/tmp/execfail.ksh.$$
  70 dtrace=$1
  71
  72 cat > $badexec <<EOF
  73 #!/this_is_a_bogus_interpreter
  74 EOF
  75
  76 chmod +x $badexec
  77
  78 sleeper &
  79 child=$!
  80 script
  81 status=$?
  82
  83 kill $child
  84 rm $badexec
  85
  86 exit $status