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package/procps-ng: add init script for sysctl

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Add a simple init script that invokes sysctl early in the initialization
process to configure kernel parameters. This is already performed by
systemd (systemd-sysctl) but there is no sysvinit/busybox counterpart.

Files are read from directories in the following list in the given order
from top to bottom:

    /run/sysctl.d/*.conf
    /etc/sysctl.d/*.conf
    /usr/local/lib/sysctl.d/*.conf
    /usr/lib/sysctl.d/*.conf
    /lib/sysctl.d/*.conf
    /etc/sysctl.conf

Signed-off-by: Carlos Santos <unixmania@gmail.com>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
This commit is contained in:
Carlos Santos 2019-05-01 20:11:39 -03:00 committed by Peter Korsgaard
parent 398c1af1d5
commit 7ab7c6c6b2
2 changed files with 69 additions and 0 deletions
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64
package/procps-ng/S02sysctl Normal file
View File

@ -0,0 +1,64 @@
#!/bin/sh
PROGRAM="sysctl"
SYSCTL_ARGS=""
# shellcheck source=/dev/null
[ -r "/etc/default/$PROGRAM" ] && . "/etc/default/$PROGRAM"
# Files are read from directories in the SYSCTL_SOURCES list, in the given
# order. A file may be used more than once, since there can be multiple
# symlinks to it. No attempt is made to prevent this.
SYSCTL_SOURCES="/etc/sysctl.d/ /usr/local/lib/sysctl.d/ /usr/lib/sysctl.d/ /lib/sysctl.d/ /etc/sysctl.conf"
# The "--system" option activates "--ignore", which is bad because invalid
# variable settings in the configuration files will not be reported on the
# system log. Use some scripting to mimic the --system behavior but still
# reporting errors. Users not interested on error report can put "-e" in
# SYSCTL_ARGS.
#
# The file redirections do the following:
#
# - stdout is redirected to syslog with facility.level "kern.info"
# - stderr is redirected to syslog with facility.level "kern.err"
# - file dscriptor 4 is used to pass the result to the "start" function.
#
run_program() {
# shellcheck disable=SC2086 # we need the word splitting
find $SYSCTL_SOURCES -maxdepth 1 -name '*.conf' -print0 2> /dev/null | \
xargs -0 -r -n 1 readlink -f | {
prog_status="OK"
while :; do
read -r file
if [ -z "$file" ]; then
echo "$prog_status" >&4
break
fi
echo "* Applying $file ..."
/sbin/sysctl -p "$file" $SYSCTL_ARGS || prog_status="FAIL"
done 2>&1 >&3 | /usr/bin/logger -t sysctl -p kern.err
} 3>&1 | /usr/bin/logger -t sysctl -p kern.info
}
start() {
printf '%s %s: ' "$1" "$PROGRAM"
status=$(run_program 4>&1)
echo "$status"
if [ "$status" = "OK" ]; then
return 0
fi
return 1
}
case "$1" in
start)
start "Running";;
restart|reload)
start "Rerunning";;
stop)
:;;
*)
echo "Usage: $0 {start|stop|restart|reload}"
exit 1
esac

5
package/procps-ng/procps-ng.mk
View File

@ -44,4 +44,9 @@ ifeq ($(BR2_STATIC_LIBS),y)
PROCPS_NG_CONF_OPTS += --disable-numa PROCPS_NG_CONF_OPTS += --disable-numa
endif endif
define PROCPS_NG_INSTALL_INIT_SYSV
$(INSTALL) -D -m 755 package/procps-ng/S02sysctl \
$(TARGET_DIR)/etc/init.d/S02sysctl
endef
$(eval $(autotools-package)) $(eval $(autotools-package))