openwrt/package/base-files/files
Tony Ambardar 484117b478 base-files: fix postinstall uci-defaults removal
Commit 7f694582 introduced a bug where default_postinst() often fails to
remove a uci-defaults script after application, leaving it to run again
after a reboot.
(Note: commit 7f694582 also introduced FS#1021, now fixed by 73c745f6)

The subtle problem arises from the shell logical chain:
[ -f "$i" ] && . "$i" && rm -f "$i"

Most uci-defaults scripts contain a terminal 'exit 0' statement which,
when sourced, results in the logic chain exiting before executing 'rm -f'.
This was observed while testing upgrades of 'luci-app-sqm'.

The solution is to wrap the shell sourcing in a subshell relative to the
command 'rm -f':
( [ -f "$i" ] && . "$i" ) && rm -f "$i"

Revert to using 'grep' to prefilter the list of entries from the control
file, which yields the full path of uci-defaults scripts. This allows
keeping the existence check, directory change and script sourcing inside
the subshell, with the script removal correctly outside.

This approach avoids adding a second subshell only around the "." (source)
command. The change also preserves the fix FS#1021, since the full path is
used to source the script, which is POSIX-portable irrespective of PATH
variable or reference to the CWD.

Run Tested on: LEDE 17.01.4 running ar71xx, while tracing installation of
package luci-app-sqm with its associated /etc/uci-defaults/luci-sqm file.

Signed-off-by: Tony Ambardar <itugrok@yahoo.com>
(backported from 4097ab6a97)
2019-01-22 07:22:59 +01:00
..
bin base-files: fix wan6 interface config generation for pppoe 2017-09-18 13:22:58 +02:00
etc base-files: fix unkillable processes after restart 2018-11-22 13:56:37 +01:00
lib base-files: fix postinstall uci-defaults removal 2019-01-22 07:22:59 +01:00
rom rename default/ to files/ 2006-11-22 23:30:57 +00:00
sbin base-files: sysupgrade: do not rely on opkg to list changed conffiles 2018-03-07 10:01:14 +01:00
usr base-files: suppress uci not found output in login.sh 2017-12-13 16:23:39 +01:00