On 2016/04/21 at 12:29, Xunlei Pang wrote:
Previously, we assumed the ifcfg file of a network
"interface" is
"/etc/sysconfig/network-scripts/ifcfg-<interface>", but actually
it is not the case.
For example, for network interface "enp0s25", we are able to
generate like "/etc/sysconfig/network-scripts/ifcfg-enp0s25-test"
for it via network-manger.
The "suffix" in "ifcfg-<suffix>" is actually a
"configuration"
name not "interface" name, though normally we use the "interface"
name as its "configuration" name. You can refer to "man ifup"
for some detail.
So, this patch adds some assistant helpers to acquire the right
ifcfg file for an interface. Borrow some logic from script below:
"/etc/sysconfig/network-scripts/network-functions"
Signed-off-by: Xunlei Pang <xlpang(a)redhat.com>
---
kdump-lib.sh | 89 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 89 insertions(+)
diff --git a/kdump-lib.sh b/kdump-lib.sh
index 4d34206..20ec525 100755
--- a/kdump-lib.sh
+++ b/kdump-lib.sh
@@ -230,3 +230,92 @@ is_hostname()
fi
echo $1 | grep -q "[a-zA-Z]"
}
+
+get_hwaddr()
+{
+ if [ -f "/sys/class/net/${1}/address" ]; then
+ awk '{ print toupper($0) }' < /sys/class/net/${1}/address
+ elif [ -d "/sys/class/net/${1}" ]; then
+ ip -o link show ${1} 2>/dev/null | \
+ awk '{ print toupper(gensub(/.*link\/[^ ]* ([[:alnum:]:]*).*/,
+ "\\1", 1)); }'
+ fi
+}
+
+get_ifcfg_by_device()
+{
+ grep -E -i -l "^[[:space:]]*DEVICE=\"*${1}\"*[[:space:]]*$" \
+ /etc/sysconfig/network-scripts/ifcfg-* 2>/dev/null | head -1
+}
+
+get_ifcfg_by_hwaddr()
+{
+ grep -E -i -l "^[[:space:]]*HWADDR=\"*${1}\"*[[:space:]]*$"
2>/dev/null \
+ /etc/sysconfig/network-scripts/ifcfg-* | head -1
+}
+
+get_ifcfg_by_name()
+{
+ grep -E -i -l "^[[:space:]]*NAME=\"*${1}\"*[[:space:]]*$"
2>/dev/null \
+ /etc/sysconfig/network-scripts/ifcfg-* | head -1
+}
+
+is_nm_running()
+{
+ [ "$(LANG=C nmcli -t --fields running general status 2>/dev/null)" =
"running" ]
+}
+
+# $1: netdev name
+get_ifcfg_nmcli()
+{
+ local nm_name
+ local ifcfg_file
+
+ # Get the active nmcli config name of $1
+ if [[ is_nm_running ]]; then
+ # The configuration name generated by nm is wrote to the ifcfg file
+ # as "NAME=<nm_name>".
+ nm_name=$(nmcli d show $1 2>/dev/null |grep GENERAL.CONNECTION \
+ |sed -e 's/GENERAL.CONNECTION: *//')
+ if [[ "${nm_name}" && "${nm_name}" != "--"
]]; then
+ ifcfg_file=$(get_ifcfg_by_name ${nm_name})
Sorry, I just realized $nm_name is not unique, I will improve it using:
"LANG=C nmcli c show --active" to get netif's UUID to find the right ifcfg
filename first.
For example
$ LANG=C nmcli c show --active
NAME UUID TYPE
DEVICE
virbr0-nic f37adcb3-5450-4c15-a386-31c940059e76 generic virbr0-nic
virbr0 e4ce9946-d402-4439-a3f1-5eb6012714aa bridge virbr0
xxxxx acd24be7-39f8-4bee-9a52-94aad72e37ed 802-3-ethernet enp0s25
tun0 eb987c98-d055-4036-981b-cec6161b0b76 generic tun0
ppp0 9336c687-ecc7-4f45-9169-c76b832de78c generic ppp0
The UUID above is also specified as one directive in netif's corresponding ifcfg
file.
Regards,
Xunlei
+ fi
+ fi
+
+ echo -n ${ifcfg_file}
+}
+
+# $1: netdev name
+get_ifcfg_legacy()
+{
+ local ifcfg_file
+
+ ifcfg_file="/etc/sysconfig/network-scripts/ifcfg-${1}"
+ [ -f "${ifcfg_file}" ] && echo -n "${ifcfg_file}"
&& return
+
+ ifcfg_file=$(get_ifcfg_by_name "${1}")
+ [ -f "${ifcfg_file}" ] && echo -n "${ifcfg_file}"
&& return
+
+ local hwaddr=$(get_hwaddr ${1})
+ if [ -n "$hwaddr" ]; then
+ ifcfg_file=$(get_ifcfg_by_hwaddr ${hwaddr})
+ [ -f "${ifcfg_file}" ] && echo -n "${ifcfg_file}"
&& return
+ fi
+
+ ifcfg_file=$(get_ifcfg_by_device ${1})
+
+ echo -n "${ifcfg_file}"
+}
+
+# $1: netdev name
+# Return the ifcfg file whole name(including the path) of $1 if any.
+get_ifcfg_filename() {
+ local ifcfg_file
+
+ ifcfg_file=$(get_ifcfg_nmcli $1)
+ if [ -z "${ifcfg_file}" ]; then
+ ifcfg_file=$(get_ifcfg_legacy $1)
+ fi
+
+ echo -n "${ifcfg_file}"
+}