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fakedate: simplify logic

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Using -ef to check for the same file is nicer than relying on a magic
symlink-to-fakedate.

Notice that -ef isn't stricly posix (but supported by bash/dash/zsh), so
I've changed the shebang to /bin/bash.

While we are at it, restructure the logic to do a single exec at the end
instead of handling the epoch/!epoch cases differently for simplicity.

With that out of the way we can directly install it as $HOST/usr/bin/date
instead of the fakedate / date symlink.

[Peter: drop IFS=: change]
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
Reviewed-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
This commit is contained in:
Peter Korsgaard 2017-02-07 23:08:17 +01:00
parent 51825df3a1
commit e7548edb5f
2 changed files with 5 additions and 12 deletions
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14
package/fakedate/fakedate
View File

@ -1,4 +1,4 @@
#!/bin/sh #!/bin/bash
# vim: set sw=4 expandtab: # vim: set sw=4 expandtab:
# #
# This program is free software; you can redistribute it and/or modify # This program is free software; you can redistribute it and/or modify
@ -18,18 +18,12 @@
# Copyright (C) 2016 Jérôme Pouiller <jezz@sysmic.org> # Copyright (C) 2016 Jérôme Pouiller <jezz@sysmic.org>
# #
# Sanity check
if ! readlink -f "$0" | grep -q fakedate; then
echo "fakedate: Please name this script \`fakedate'"
exit 1
fi
DATE_BIN=false DATE_BIN=false
# Do not call `date' directly since it will produce an infinite recursion. # Do not call `date' directly since it will produce an infinite recursion.
# Instead, find path of true `date' binary. # Instead, find path of true `date' binary.
for P in `echo $PATH | tr ':' ' '`; do for P in `echo $PATH | tr ':' ' '`; do
if [ -x "$P/date" ]; then if [ -x "$P/date" ]; then
if readlink -f "$P/date" | grep -qv fakedate; then if ! [ "$P/date" -ef "$0" ]; then
DATE_BIN="$P/date" DATE_BIN="$P/date"
break; break;
fi fi
@ -50,8 +44,8 @@ if [ -n "$SOURCE_DATE_EPOCH" ]; then
done done
if [ $FORCE_EPOCH -eq 1 ]; then if [ $FORCE_EPOCH -eq 1 ]; then
echo "date: Warning: using \$SOURCE_DATE_EPOCH instead of true time" >&2 echo "date: Warning: using \$SOURCE_DATE_EPOCH instead of true time" >&2
exec $DATE_BIN -d "@$SOURCE_DATE_EPOCH" "$@" ARGS="-d @$SOURCE_DATE_EPOCH"
fi fi
fi fi
exec $DATE_BIN "$@" exec $DATE_BIN $ARGS "$@"

3
package/fakedate/fakedate.mk
View File

@ -8,8 +8,7 @@
HOST_FAKEDATE_LICENSE = GPL-2.0+ HOST_FAKEDATE_LICENSE = GPL-2.0+
define HOST_FAKEDATE_INSTALL_CMDS define HOST_FAKEDATE_INSTALL_CMDS
$(INSTALL) -D -m 755 package/fakedate/fakedate $(HOST_DIR)/usr/bin/fakedate $(INSTALL) -D -m 755 package/fakedate/fakedate $(HOST_DIR)/usr/bin/date
ln -sfn fakedate $(HOST_DIR)/usr/bin/date
endef endef
$(eval $(host-generic-package)) $(eval $(host-generic-package))