[Buildroot] [PATCH v3 1/2] package/procps-ng: add init script for sysctl
unixmania at gmail.com
unixmania at gmail.com
Wed May 1 23:11:39 UTC 2019
From: Carlos Santos <unixmania at gmail.com>
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 at gmail.com>
---
Changes v2->v3:
- Update SOB, since I don't work for DATACOM anymore.
Changes v1->v2:
- 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.
- Redirect sysctl's standard output to syslog with facility.level
"kern.info" and standard error to syslog with facility.level
"kern.err".
- Do not pass "--quiet" to sysctl, since we wanto to see the results.
- Use "Running" and "Rerunning" instead of "Starting", since we do not
really start anything, just run a program.
- Do nothing on "stop", since ther is no running daemon to stop.
---
package/procps-ng/S02sysctl | 64 ++++++++++++++++++++++++++++++++++
package/procps-ng/procps-ng.mk | 5 +++
2 files changed, 69 insertions(+)
create mode 100644 package/procps-ng/S02sysctl
---
package/procps-ng/S02sysctl | 64 ++++++++++++++++++++++++++++++++++
package/procps-ng/procps-ng.mk | 5 +++
2 files changed, 69 insertions(+)
create mode 100644 package/procps-ng/S02sysctl
diff --git a/package/procps-ng/S02sysctl b/package/procps-ng/S02sysctl
new file mode 100644
index 0000000000..3a58578de4
--- /dev/null
+++ b/package/procps-ng/S02sysctl
@@ -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: $0 {start|stop|restart|reload}"
+ exit 1
+esac
diff --git a/package/procps-ng/procps-ng.mk b/package/procps-ng/procps-ng.mk
index 03b74784d2..6a41e9b322 100644
--- a/package/procps-ng/procps-ng.mk
+++ b/package/procps-ng/procps-ng.mk
@@ -44,4 +44,9 @@ ifeq ($(BR2_STATIC_LIBS),y)
PROCPS_NG_CONF_OPTS += --disable-numa
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))
--
2.20.1
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