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support/dependencies: check that PATH does not contain CWD

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A person on IRC reported a build failure with the util-linux package,
looking like this:

for I in uname26 linux32 linux64        ; do \
	cd /home/aep/consulting/chargery/tracker/output/target/usr/bin && ln -sf setarch $I ; \
done
[...]
/bin/sh: line 1: ./ln: cannot execute binary file: Exec format error
/bin/sh: line 1: ./ln: cannot execute binary file: Exec format error
/bin/sh: line 1: ./ln: cannot execute binary file: Exec format error

The issue was an empty path in the PATH variable, which means "current
working directory", causing a "ln" binary built by util-linux for the
target to be used instead of the system-provided "ln".

We already check a number of things in the PATH and LD_LIBRARY_PATH
variables in support/dependencies/dependencies.sh, but we were not
checking that PATH did not contain an empty path.

This commit fixes that and takes this opportunity to simplify the test
code for PATH and LD_LIBRARY_PATH.

Signed-off-by: "Yann E. MORIN" <yann.morin.1998@free.fr>
Cc: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
[Thomas: improve commit log.]
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
This commit is contained in:
Yann E. MORIN 2018-05-09 19:59:24 +02:00 committed by Thomas Petazzoni
parent b73e9e3d21
commit 72703d02b9
1 changed files with 23 additions and 36 deletions
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59
support/dependencies/dependencies.sh
View File

@ -11,27 +11,30 @@ if test $? != 0 ; then
exit 1
fi
# sanity check for CWD in LD_LIBRARY_PATH
# try not to rely on egrep..
if test -n "$LD_LIBRARY_PATH" ; then
echo TRiGGER_start"$LD_LIBRARY_PATH"TRiGGER_end | grep '::' >/dev/null 2>&1 ||
echo TRiGGER_start"$LD_LIBRARY_PATH"TRiGGER_end | grep ':\.:' >/dev/null 2>&1 ||
echo TRiGGER_start"$LD_LIBRARY_PATH"TRiGGER_end | grep 'TRiGGER_start:' >/dev/null 2>&1 ||
echo TRiGGER_start"$LD_LIBRARY_PATH"TRiGGER_end | grep 'TRiGGER_start\.:' >/dev/null 2>&1 ||
echo TRiGGER_start"$LD_LIBRARY_PATH"TRiGGER_end | grep ':TRiGGER_end' >/dev/null 2>&1 ||
echo TRiGGER_start"$LD_LIBRARY_PATH"TRiGGER_end | grep ':\.TRiGGER_end' >/dev/null 2>&1 ||
echo TRiGGER_start"$LD_LIBRARY_PATH"TRiGGER_end | grep 'TRiGGER_start\.TRiGGER_end' >/dev/null 2>&1
if test $? = 0; then
echo
echo "You seem to have the current working directory in your"
echo "LD_LIBRARY_PATH environment variable. This doesn't work."
exit 1;
fi
fi;
# Sanity check for CWD in LD_LIBRARY_PATH
case ":${LD_LIBRARY_PATH:-unset}:" in
(*::*|*:.:*)
echo
echo "You seem to have the current working directory in your"
echo "LD_LIBRARY_PATH environment variable. This doesn't work."
exit 1
;;
esac
# PATH should not contain a newline, otherwise it fails in spectacular ways
# as soon as PATH is referenced in a package rule
case "${PATH}" in
# Sanity check for CWD in PATH. Having the current working directory
# in the PATH makes various packages (e.g. toolchain, coreutils...)
# build process break.
# PATH should not contain a newline, otherwise it fails in spectacular
# ways as soon as PATH is referenced in a package rule
# An empty PATH is technically possible, but in practice we would not
# even arrive here if that was the case.
case ":${PATH:-unset}:" in
(*::*|*:.:*)
echo
echo "You seem to have the current working directory in your"
echo "PATH environment variable. This doesn't work."
exit 1
;;
(*"
"*) printf "\n"
# Break the '\n' sequence, or a \n is printed (which is not what we want).
@ -41,22 +44,6 @@ case "${PATH}" in
;;
esac
# sanity check for CWD in PATH. Having the current working directory
# in the PATH makes the toolchain build process break.
# try not to rely on egrep..
if test -n "$PATH" ; then
echo TRiGGER_start"$PATH"TRiGGER_end | grep ':\.:' >/dev/null 2>&1 ||
echo TRiGGER_start"$PATH"TRiGGER_end | grep 'TRiGGER_start\.:' >/dev/null 2>&1 ||
echo TRiGGER_start"$PATH"TRiGGER_end | grep ':\.TRiGGER_end' >/dev/null 2>&1 ||
echo TRiGGER_start"$PATH"TRiGGER_end | grep 'TRiGGER_start\.TRiGGER_end' >/dev/null 2>&1
if test $? = 0; then
echo
echo "You seem to have the current working directory in your"
echo "PATH environment variable. This doesn't work."
exit 1;
fi
fi;
if test -n "$PERL_MM_OPT" ; then
echo
echo "You have PERL_MM_OPT defined because Perl local::lib"