usr/src/lib/libc/i386/etc/caplib.ksh

   1 #!/bin/ksh
   2 #
   3 # CDDL HEADER START
   4 #
   5 # The contents of this file are subject to the terms of the
   6 # Common Development and Distribution License (the "License").
   7 # You may not use this file except in compliance with the License.
   8 #
   9 # You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
  10 # or http://www.opensolaris.org/os/licensing.
  11 # See the License for the specific language governing permissions
  12 # and limitations under the License.
  13 #
  14 # When distributing Covered Code, include this CDDL HEADER in each
  15 # file and include the License file at usr/src/OPENSOLARIS.LICENSE.
  16 # If applicable, add the following below this CDDL HEADER, with the
  17 # fields enclosed by brackets "[]" replaced with your own identifying
  18 # information: Portions Copyright [yyyy] [name of copyright owner]
  19 #
  20 # CDDL HEADER END
  21 #
  22 #
  23 # ident "%Z%%M% %I%     %E% SMI"
  24 #
  25 # Copyright 2006 Sun Microsystems, Inc.  All rights reserved.
  26 # Use is subject to license terms.
  27 #
  28
  29 #
  30 # This script is called by flarcreate.sh
  31 #
  32 # Unmount all hwcap libraries (like /usr/lib/libc/libc_hwcap2.so.1)
  33 # and store commands needed to remount them in preexit/remount_hwcap.xxxx
  34 # scripts, which remounts them in the preexit phase.
  35 #
  36
  37 if [ -z "$FLASH_PID" ]; then
  38         echo "$0: ERROR: FLASH_PID not set in execution environment, exiting..."
  39         exit 1
  40 fi
  41 if [ -z "$FLASH_DIR" ]; then
  42         echo "$0: ERROR: FLASH_DIR not set in execution environment, exiting..."
  43         exit 1
  44 fi
  45
  46 CHMOD=/usr/bin/chmod
  47 ELFDUMP=/usr/ccs/bin/elfdump
  48 MOUNT=/usr/sbin/mount
  49 UMOUNT=/usr/sbin/umount
  50 EGREP=/usr/bin/egrep
  51 SED=/usr/bin/sed
  52 CMD_LIST="$CHMOD $ELFDUMP $MOUNT $UMOUNT $EGREP $SED"
  53
  54 for cmd in $CMD_LIST
  55 do
  56     if [ ! -x $cmd ]; then
  57         echo "$0: ERROR: $cmd not found or not executable, exiting..."
  58         exit 1
  59     fi
  60 done
  61
  62 #
  63 # Fill "LIBS" with a list of mounted libraries in the form:
  64 #       MOUNTPOUNT:FILE
  65 # e.g.:
  66 #       /lib/libc.so.1:/usr/lib/libc/libc_hwcap2.so.1
  67 #
  68 LIBS=`$MOUNT | $EGREP "^/lib|^/usr/lib" | \
  69     $SED -e 's:^\(/[^ ]*\) on \([^ ]*\).*$:\1@\2:'`
  70
  71 if [ ! "$LIBS" ]; then
  72         exit 0
  73 fi
  74
  75 REMOUNT_DIR=${FLASH_DIR}/preexit
  76 REMOUNT=${REMOUNT_DIR}/remount_hwcap.${FLASH_PID}
  77
  78 #
  79 # Create the flash preexit script directory for the remount scripts if it
  80 # doesn't already exist.
  81 #
  82 if [ ! -d $REMOUNT_DIR ]; then
  83         umask 077
  84         /usr/bin/mkdir $REMOUNT_DIR
  85         if [ $? -ne 0 ]; then
  86                 echo "$0: ERROR: could not mkdir $REMOUNT_DIR, exiting..."
  87                 exit 1
  88         fi
  89 fi
  90
  91 #
  92 # If an old remount script by this name exists, delete it
  93 #
  94 if [ -f $REMOUNT ]; then
  95         /bin/rm -f $REMOUNT
  96 fi
  97
  98 umask 477
  99
 100 cat > $REMOUNT << EOF
 101 #!/bin/sh
 102 if [ \"\$FLASH_PID\" != \"$FLASH_PID\" ]; then
 103         /bin/rm -f $REMOUNT
 104         exit 0
 105 fi
 106 EOF
 107
 108 if [ $? -ne 0 ]; then
 109         echo "$0: ERROR: could not create $REMOUNT, exiting..."
 110         exit 1
 111 fi
 112
 113 #
 114 # Now process each of the libraries that are mounted.  For each, find out if
 115 # it's a hwcap library; if it is, unmount it and write instructions to the
 116 # preexit script as to how to remount it.
 117 #
 118 for entry in $LIBS
 119 do
 120         echo $entry | IFS=@ read MOUNTPOINT MOUNTLIB
 121         CAPLIB=`$ELFDUMP -H $MOUNTLIB`
 122         if [ \( $? -eq 0 \) -a \( -n "$CAPLIB" \) ]; then
 123                 $UMOUNT $MOUNTPOINT || $UMOUNT -f $MOUNTPOINT || \
 124                     { echo "$0: ERROR: Could not unmount" \
 125                           "$MOUNTPOINT, exiting..."; \
 126                       /bin/sh $REMOUNT; /bin/rm -f $REMOUNT; exit 1; }
 127
 128                 echo $MOUNTLIB | $EGREP -s :
 129                 if [ $? -eq 0 ]; then
 130                         MOUNTOPTS="-O"
 131                 else
 132                         MOUNTOPTS="-O -F lofs"
 133                 fi
 134                 echo "$MOUNT $MOUNTOPTS $MOUNTLIB $MOUNTPOINT" >> $REMOUNT
 135         fi
 136 done
 137
 138 #
 139 # Write final cleanup instructions to the flash preexit remount script and make
 140 # it executable.
 141 #
 142 echo "/bin/rm -f $REMOUNT" >> $REMOUNT
 143 echo "exit 0" >> $REMOUNT
 144 $CHMOD 0500 $REMOUNT
 145 exit 0