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-   -   Prelink error message on CentOS (https://www.linuxquestions.org/questions/linux-software-2/prelink-error-message-on-centos-4175667690/)

pipolin 01-14-2020 08:01 AM

Prelink error message on CentOS
 
That's the mail i often get when Anacron plays prelink on CentOS VM :


/etc/cron.daily/prelink:

/usr/bin/ldd: line 163: /lib/ld-linux.so.2: Permission denied


Impossible to identify an execution missing attribute on any file or any library involved on a binary. Any idea ?

See below :



# cd /lib
# ll ld-linux.so.2
lrwxrwxrwx. 1 root root 9 Apr 27 2012 ld-linux.so.2 -> ld-2.5.so
# ll ld-2.5.so
-rwxr-xr-x. 1 root root 130860 Apr 27 2012 ld-2.5.so


# cat /etc/cron.daily/prelink


#!/bin/sh

. /etc/sysconfig/prelink

renice +19 -p $$ >/dev/null 2>&1

if [ "$PRELINKING" != yes ]; then
if [ -f /etc/prelink.cache ]; then
echo /usr/sbin/prelink -uav > /var/log/prelink/prelink.log
/usr/sbin/prelink -uav >> /var/log/prelink/prelink.log 2>&1 \
|| echo Prelink failed with return value $? >> /var/log/prelink/prelink.log
rm -f /etc/prelink.cache
# Restart init if needed
[ -n "$(find `ldd /sbin/init | awk 'NF == 4 { print $3 }'` /sbin/init -ctime -1 2>/dev/null )" ] && /sbin/telinit u
fi
exit 0
fi

if [ ! -f /etc/prelink.cache -o -f /var/lib/prelink/force ] \
|| grep -q '^prelink-ELF0.[0-2]' /etc/prelink.cache; then
# If cache does not exist or is from older prelink versions or
# if we were asked to explicitely, force full prelinking
rm -f /etc/prelink.cache /var/lib/prelink/force
PRELINK_OPTS="$PRELINK_OPTS -f"
date > /var/lib/prelink/full
cp -a /var/lib/prelink/{full,quick}
elif [ -n "$PRELINK_FULL_TIME_INTERVAL" \
-a "`find /var/lib/prelink/full -mtime -${PRELINK_FULL_TIME_INTERVAL} 2>/dev/null`" \
= /var/lib/prelink/full ]; then
# If no more than PRELINK_NONRPM_CHECK_INTERVAL days elapsed from last prelink
# (be it full or quick) and no packages have been upgraded via rpm since then,
# don't do anything.
[ "`find /var/lib/prelink/quick -mtime -${PRELINK_NONRPM_CHECK_INTERVAL:-7} 2>/dev/null`" \
-a -f /var/lib/rpm/Packages \
-a /var/lib/rpm/Packages -ot /var/lib/prelink/quick ] && exit 0
date > /var/lib/prelink/quick
# If prelink without -q has been run in the last
# PRELINK_FULL_TIME_INTERVAL days, just use quick mode
PRELINK_OPTS="$PRELINK_OPTS -q"
else
date > /var/lib/prelink/full
cp -a /var/lib/prelink/{full,quick}
fi

echo /usr/sbin/prelink -av $PRELINK_OPTS > /var/log/prelink/prelink.log
/usr/sbin/prelink -av $PRELINK_OPTS >> /var/log/prelink/prelink.log 2>&1 \
|| echo Prelink failed with return value $? >> /var/log/prelink/prelink.log
# Restart init if needed
[ -n "$(find `ldd /sbin/init | awk 'NF == 4 { print $3 }'` /sbin/init -ctime -1 2>/dev/null )" ] && /sbin/telinit u

exit 0

# cat /usr/bin/ldd
#! /bin/bash
# Copyright (C) 1996-2008, 2009, 2010 Free Software Foundation, Inc.
# This file is part of the GNU C Library.

# The GNU C Library is free software; you can redistribute it and/or
# modify it under the terms of the GNU Lesser General Public
# License as published by the Free Software Foundation; either
# version 2.1 of the License, or (at your option) any later version.

# The GNU C Library is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
# Lesser General Public License for more details.

# You should have received a copy of the GNU Lesser General Public
# License along with the GNU C Library; if not, write to the Free
# Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
# 02111-1307 USA.


# This is the `ldd' command, which lists what shared libraries are
# used by given dynamically-linked executables. It works by invoking the
# run-time dynamic linker as a command and setting the environment
# variable LD_TRACE_LOADED_OBJECTS to a non-empty value.

# We should be able to find the translation right at the beginning.
TEXTDOMAIN=libc
TEXTDOMAINDIR=/usr/share/locale

RTLDLIST="/lib/ld-linux.so.2 /lib64/ld-linux-x86-64.so.2"
warn=
bind_now=
verbose=

while test $# -gt 0; do
case "$1" in
--vers | --versi | --versio | --version)
echo 'ldd (GNU libc) 2.12'
printf $"Copyright (C) %s Free Software Foundation, Inc.
This is free software; see the source for copying conditions. There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
" "2010"
printf $"Written by %s and %s.
" "Roland McGrath" "Ulrich Drepper"
exit 0
;;
--h | --he | --hel | --help)
echo $"Usage: ldd [OPTION]... FILE...
--help print this help and exit
--version print version information and exit
-d, --data-relocs process data relocations
-r, --function-relocs process data and function relocations
-u, --unused print unused direct dependencies
-v, --verbose print all information
"
echo $"For bug reporting instructions, please see:
<http://www.gnu.org/software/libc/bugs.html>.
"
exit 0
;;
-d | --d | --da | --dat | --data | --data- | --data-r | --data-re | \
--data-rel | --data-relo | --data-reloc | --data-relocs)
warn=yes
shift
;;
-r | --f | --fu | --fun | --func | --funct | --functi | --functio | \
--function | --function- | --function-r | --function-re | --function-rel | \
--function-relo | --function-reloc | --function-relocs)
warn=yes
bind_now=yes
shift
;;
-v | --verb | --verbo | --verbos | --verbose)
verbose=yes
shift
;;
-u | --u | --un | --unu | --unus | --unuse | --unused)
unused=yes
shift
;;
--v | --ve | --ver)
echo >&2 $"ldd: option \`$1' is ambiguous"
exit 1
;;
--) # Stop option processing.
shift; break
;;
-*)
echo >&2 'ldd:' $"unrecognized option" "\`$1'"
echo >&2 $"Try \`ldd --help' for more information."
exit 1
;;
*)
break
;;
esac
done

nonelf ()
{
# Maybe extra code for non-ELF binaries.
return 1;
}

add_env="LD_TRACE_LOADED_OBJECTS=1 LD_WARN=$warn LD_BIND_NOW=$bind_now"
add_env="$add_env LD_LIBRARY_VERSION=\$verify_out"
add_env="$add_env LD_VERBOSE=$verbose"
if test "$unused" = yes; then
add_env="$add_env LD_DEBUG="$LD_DEBUG${LD_DEBUG:+,}unused""
fi

# The following use of cat is needed to make ldd work in SELinux
# environments where the executed program might not have permissions
# to write to the console/tty. But only bash 3.x supports the pipefail
# option, and we don't bother to handle the case for older bash versions.
if set -o pipefail 2> /dev/null; then
try_trace() {
eval $add_env '"$@"' | cat
}
else
try_trace() {
eval $add_env '"$@"'
}
fi

case $# in
0)
echo >&2 'ldd:' $"missing file arguments"
echo >&2 $"Try \`ldd --help' for more information."
exit 1
;;
1)
single_file=t
;;
*)
single_file=f
;;
esac

result=0
for file do
# We don't list the file name when there is only one.
test $single_file = t || echo "${file}:"
case $file in
*/*) :
;;
*) file=./$file
;;
esac
if test ! -e "$file"; then
echo "ldd: ${file}:" $"No such file or directory" >&2
result=1
elif test ! -f "$file"; then
echo "ldd: ${file}:" $"not regular file" >&2
result=1
elif test -r "$file"; then
test -x "$file" || echo 'ldd:' $"\
warning: you do not have execution permission for" "\`$file'" >&2
RTLD=
ret=1
for rtld in ${RTLDLIST}; do
if test -x $rtld; then
verify_out=`${rtld} --verify "$file"`
ret=$?
case $ret in
[02]) RTLD=${rtld}; break;;
esac
fi
done
case $ret in
1)
# This can be a non-ELF binary or no binary at all.
nonelf "$file" || {
echo $" not a dynamic executable"
result=1
}
;;
0|2)
try_trace "$RTLD" "$file" || result=1
;;
*)
echo 'ldd:' ${RTLD} $"exited with unknown exit code" "($ret)" >&2
exit 1
;;
esac
else
echo 'ldd:' $"error: you do not have read permission for" "\`$file'" >&2
result=1
fi
done

exit $result
# Local Variables:
# mode:ksh
# End:

# lsb_release -a
LSB Version: :core-4.0-amd64:core-4.0-noarch:graphics-4.0-amd64:graphics-4.0-noarch:printing-4.0-amd64:printing-4.0-noarch
Distributor ID: CentOS
Description: CentOS release 6.2 (Final)
Release: 6.2
Codename: Final


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