diff options
| author | Michael Brown <mcb30@ipxe.org> | 2011-03-28 18:48:48 +0100 |
|---|---|---|
| committer | Michael Brown <mcb30@ipxe.org> | 2011-03-28 18:50:27 +0100 |
| commit | 2f6e7bde772205726369b4d0a98a01f3e0b06c16 (patch) | |
| tree | 6d11a2f15489815234ecfd26f6e02097398b4bad /src/include/ipxe/dhcp.h | |
| parent | b5f5f735c1aa1817e460760b0c2da25e04ef7124 (diff) | |
| download | ipxe-2f6e7bde772205726369b4d0a98a01f3e0b06c16.tar.gz | |
[main] Add the "scriptlet" setting
A scriptlet is a single iPXE command that can be stored in
non-volatile option storage and used to override the default
"autoboot" behaviour without having to reflash the iPXE image.
For example, a scriptlet could contain
autoboot || reboot
to instruct iPXE to reboot the system if booting fails.
Unlike an embedded image, the presence of a scriptlet does not inhibit
the initial "Press Ctrl-B..." prompt. This allows the user to recover
from setting a faulty scriptlet.
Originally-implemented-by: Glenn Brown <glenn@myri.com>
Signed-off-by: Michael Brown <mcb30@ipxe.org>
Diffstat (limited to 'src/include/ipxe/dhcp.h')
| -rw-r--r-- | src/include/ipxe/dhcp.h | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/src/include/ipxe/dhcp.h b/src/include/ipxe/dhcp.h index 54a85f661..148e3d66f 100644 --- a/src/include/ipxe/dhcp.h +++ b/src/include/ipxe/dhcp.h @@ -307,10 +307,17 @@ struct dhcp_client_uuid { #define DHCP_EB_SKIP_SAN_BOOT DHCP_ENCAP_OPT ( DHCP_EB_ENCAP, 0x09 ) /* - * Tags in the range 0x10-0x7f are reserved for feature markers + * Tags in the range 0x10-0x4f are reserved for feature markers * */ +/** Scriptlet + * + * If a scriptlet exists, it will be executed in place of the usual + * call to autoboot() + */ +#define DHCP_EB_SCRIPTLET DHCP_ENCAP_OPT ( DHCP_EB_ENCAP, 0x51 ) + /** Skip PXE DHCP protocol extensions such as ProxyDHCP * * If set to a non-zero value, iPXE will not wait for ProxyDHCP offers |