osmith has submitted this change. ( https://gerrit.osmocom.org/c/osmo-ttcn3-hacks/+/40164?usp=email )

Change subject: tcpdump/dumpcap: move kill_rm_pidfile to inc file ......................................................................

tcpdump/dumpcap: move kill_rm_pidfile to inc file

Move kill_rm_pidfile out of the 4 ttcn3 tcpdump/dumpcap scripts into a shared include file. Use the version of the function that only tries to kill the command with sudo if it was started with sudo.

This fixes dumpcap not stopping if:

* it was started with ttcn3-tcpdump-start.sh (despite the name it will start dumpcap instead of tcpdump if dumpcap was found), where it gets started without sudo, and

* no rule is set in the user's sudoers file to run kill as root with NOPASSWD.

Change-Id: Ia63c37b54fb42a8c64a676334cef6f9df4152e18 --- A _scripts/tcpdump-dumpcap.inc.sh M ttcn3-dumpcap-start.sh M ttcn3-dumpcap-stop.sh M ttcn3-tcpdump-start.sh M ttcn3-tcpdump-stop.sh 5 files changed, 23 insertions(+), 43 deletions(-)

Approvals: fixeria: Looks good to me, but someone else must approve Jenkins Builder: Verified pespin: Looks good to me, but someone else must approve osmith: Looks good to me, approved

diff --git a/_scripts/tcpdump-dumpcap.inc.sh b/_scripts/tcpdump-dumpcap.inc.sh new file mode 100644 index 0000000..d033998 --- /dev/null +++ b/_scripts/tcpdump-dumpcap.inc.sh @@ -0,0 +1,15 @@ +# This file gets included by ttcn3-{tcpdump,dumpcap}-{start,stop} scripts + +kill_rm_pidfile() { + if [ -e $1 ]; then + PSNAME="$(ps -q "$(cat "$1")" -o comm=)" + if [ "$PSNAME" != "sudo" ]; then + kill "$(cat "$1")" + else + # NOTE: This requires you to be root or something like + # "laforge ALL=NOPASSWD: /usr/sbin/tcpdump, /bin/kill" in your sudoers file + sudo kill "$(cat "$1")" + fi + rm $1 + fi +} diff --git a/ttcn3-dumpcap-start.sh b/ttcn3-dumpcap-start.sh index a1e64fc..ddd4eb4 100755 --- a/ttcn3-dumpcap-start.sh +++ b/ttcn3-dumpcap-start.sh @@ -4,6 +4,8 @@ # needed when we want to capture from interfaces of different link # types. It will also store the results as pcap-ng, not plain old pcap.

+. "$(dirname "$0")/_scripts/tcpdump-dumpcap.inc.sh" + PIDFILE_PCAP=/tmp/pcap.pid DUMPCAP=/usr/bin/dumpcap

@@ -13,13 +15,6 @@

TESTCASE=$1

-kill_rm_pidfile() { - if [ -e $1 ]; then - kill "$(cat "$1")" - rm $1 - fi -} - echo "------ $TESTCASE ------" date

diff --git a/ttcn3-dumpcap-stop.sh b/ttcn3-dumpcap-stop.sh index 95bcdb6..1ac8e7b 100755 --- a/ttcn3-dumpcap-stop.sh +++ b/ttcn3-dumpcap-stop.sh @@ -1,24 +1,12 @@ #!/bin/sh

+. "$(dirname "$0")/_scripts/tcpdump-dumpcap.inc.sh" + PIDFILE_PCAP=/tmp/pcap.pid PIDFILE_NETCAT=/tmp/netcat.pid TESTCASE=$1 VERDICT="$2"

-kill_rm_pidfile() { -if [ -e $1 ]; then - PSNAME="$(ps -q "$(cat "$1")" -o comm=)" - if [ "$PSNAME" != "sudo" ]; then - kill "$(cat "$1")" - else - # NOTE: This requires you to be root or something like - # "laforge ALL=NOPASSWD: /usr/sbin/tcpdump, /bin/kill" in your sudoers file - sudo kill "$(cat "$1")" - fi - rm $1 -fi -} - date

if [ x"$VERDICT" = x"pass" ]; then diff --git a/ttcn3-tcpdump-start.sh b/ttcn3-tcpdump-start.sh index 9575a68..2c2f8c5 100755 --- a/ttcn3-tcpdump-start.sh +++ b/ttcn3-tcpdump-start.sh @@ -1,5 +1,7 @@ #!/bin/sh

+. "$(dirname "$0")/_scripts/tcpdump-dumpcap.inc.sh" + PIDFILE_PCAP=/tmp/pcap.pid TCPDUMP=$(command -v tcpdump) DUMPCAP=$(command -v dumpcap) @@ -18,17 +20,6 @@ # and this script will hang indefinitely fi

-kill_rm_pidfile() { - # NOTE: This requires you to be root or something like - # "laforge ALL=NOPASSWD: /usr/sbin/tcpdump, /bin/kill" in your sudoers file - if [ -e "$1" ]; then - if [ -s "$1" ]; then - $SUDOSTR kill "$(cat "$1")" 2>&1 | grep -v "No such process" - fi - rm $1 - fi -} - echo "------ $TESTCASE ------" date

diff --git a/ttcn3-tcpdump-stop.sh b/ttcn3-tcpdump-stop.sh index def10d8..65aeb2a 100755 --- a/ttcn3-tcpdump-stop.sh +++ b/ttcn3-tcpdump-stop.sh @@ -1,5 +1,7 @@ #!/bin/sh

+. "$(dirname "$0")/_scripts/tcpdump-dumpcap.inc.sh" + PIDFILE_PCAP=/tmp/pcap.pid PIDFILE_NETCAT=/tmp/netcat.pid FIFO=/tmp/cmderr @@ -13,17 +15,6 @@ # and this script will hang indefinitely fi

-kill_rm_pidfile() { - # NOTE: This requires you to be root or something like - # "laforge ALL=NOPASSWD: /usr/sbin/tcpdump, /bin/kill" in your sudoers file - if [ -e "$1" ]; then - if [ -s "$1" ]; then - $SUDOSTR kill "$(cat "$1")" 2>&1 | grep -v "No such process" - fi - rm $1 - fi -} - date

if [ x"$VERDICT" = x"pass" ]; then