XPost: linux.debian.maint.boot
From:
[email protected]
Right so I was wrong, netcfg reads the domain from here: /tmp/domain_name
which is filled by udhcpc default.script
The patch above won't work alone as we would need udhcpc to write the
search domain to a file and make a read function in netcfg to get the info
(or something along those lines)
Here is an updated version of the hack:
d-i preseed/early_command string \
sed -i 's|printf "\$domain" > /tmp/domain_name|printf "$search" > /tmp/domain_name|' /etc/udhcpc/default.script; \
mv /sbin/udhcpc /sbin/udhcpc.real; \
echo '#!/bin/sh' > /sbin/udhcpc; \
echo 'exec /bin/busybox udhcpc -O search "$@"' >> /sbin/udhcpc; \
chmod +x /sbin/udhcpc
On Thu, Jul 3, 2025 at 12:30 PM Frédéric Guyot <
[email protected]> wrote:
Here is an updated patch for this issue:
--- dhcp.c
+++ dhcp.c
@@ -41,6 +41,7 @@
"domain",
"hostname",
"dns",
+ "search",
"ntpsrv", /* extra */
NULL };
@@ -510,7 +511,7 @@
* nameservers now so we can do rDNS lookups later to possibly
* find out the domain.
*/
- netcfg_write_resolv(NULL, interface);
+ netcfg_write_resolv(NULL, NULL, interface);
state = HOSTNAME;
break;
@@ -613,7 +614,7 @@
netcfg_write_common("", hostname, domain);
netcfg_write_loopback();
netcfg_write_interface(interface);
- netcfg_write_resolv(domain, interface);
+ netcfg_write_resolv(domain, search, interface);
#if !defined(__FreeBSD_kernel__)
kill_dhcp_client();
#endif
--- static.c
+++ static.c
@@ -258,14 +258,16 @@
return 1;
}
-int netcfg_write_resolv (const char *domain, const struct netcfg_interface *interface)
+int netcfg_write_resolv (const char *domain , const char *search, const struct netcfg_interface *interface)
{
FILE* fp = NULL;
if ((fp = file_open(RESOLV_FILE, "w"))) {
unsigned int i = 0;
+ if (search && !empty_str(search))
+ fprintf(fp, "search %s\n", search);
if (domain && !empty_str(domain))
- fprintf(fp, "search %s\n", domain);
+ fprintf(fp, "domain %s\n", domain);
for (i = 0; i < NETCFG_NAMESERVERS_MAX; i++)
if (!empty_str(interface->nameservers[i]))
This should do the trick.
If someone comes across this issue and this patch hasn't been merged we found an ugly workaround using a preseed file:
d-i preseed/early_command string \
sed -i '/^case /i domain="$search"' /etc/udhcpc/default.script; \
mv /sbin/udhcpc /sbin/udhcpc.real; \
echo '#!/bin/sh' > /sbin/udhcpc; \
echo 'exec /bin/busybox udhcpc -O search "$@"' >> /sbin/udhcpc; \
chmod +x /sbin/udhcpc
It will make a wrapper for udhcpc that will force netcfg to query search domains, patch the default.script callback script from udhcpc to make domain="$seach".
regards
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