From 5884c94b1f92c00406d137c9f308c098e5268a59 Mon Sep 17 00:00:00 2001
From: PA4WDH
Date: Tue, 13 Jul 2021 19:47:04 +0200
Subject: Initial commit

---
 sys-apps/sysvinit/files/sysvinit-2.86-kexec.patch | 142 ++++++++++++++++++++++
 1 file changed, 142 insertions(+)
 create mode 100644 sys-apps/sysvinit/files/sysvinit-2.86-kexec.patch

(limited to 'sys-apps/sysvinit/files/sysvinit-2.86-kexec.patch')

diff --git a/sys-apps/sysvinit/files/sysvinit-2.86-kexec.patch b/sys-apps/sysvinit/files/sysvinit-2.86-kexec.patch
new file mode 100644
index 0000000..4948806
--- /dev/null
+++ b/sys-apps/sysvinit/files/sysvinit-2.86-kexec.patch
@@ -0,0 +1,142 @@
+halt: add a -k kexec flag
+
+--- a/man/halt.8
++++ b/man/halt.8
+@@ -40,6 +40,7 @@ halt, reboot, poweroff \- stop the system.
+ .RB [ \-d ]
+ .RB [ \-f ]
+ .RB [ \-i ]
++.RB [ \-k ]
+ .br
+ .B /sbin/poweroff
+ .RB [ \-n ]
+@@ -83,6 +84,8 @@ Put all hard drives on the system in stand-by mode just before halt or power-off
+ .IP \fB\-p\fP
+ When halting the system, switch off the power. This is the default when halt is
+ called as \fBpoweroff\fP.
++.IP \fB\-k\fP
++Try to reboot using \fBkexec\fP, if kernel supports it.
+ .\"}}}
+ .\"{{{  Diagnostics
+ .SH DIAGNOSTICS
+--- a/src/halt.c
++++ b/src/halt.c
+@@ -8,7 +8,7 @@
+  *		execute an "shutdown -r". This is for compatibility with
+  *		sysvinit 2.4.
+  *
+- * Usage:	halt [-n] [-w] [-d] [-f] [-h] [-i] [-p]
++ * Usage:	halt [-n] [-w] [-d] [-f] [-h] [-i] [-p] [-k]
+  *		-n: don't sync before halting the system
+  *		-w: only write a wtmp reboot record and exit.
+  *		-d: don't write a wtmp record.
+@@ -16,6 +16,7 @@
+  *		-h: put harddisks in standby mode
+  *		-i: shut down all network interfaces.
+  *		-p: power down the system (if possible, otherwise halt).
++ *		-k: reboot the system using kexec.
+  *
+  *		Reboot and halt are both this program. Reboot
+  *		is just a link to halt. Invoking the program
+@@ -74,8 +75,10 @@ extern void write_wtmp(char *user, char *id, int pid, int type, char *line);
+  */
+ void usage(void)
+ {
+-	fprintf(stderr, "usage: %s [-n] [-w] [-d] [-f] [-h] [-i]%s\n",
+-		progname, strcmp(progname, "halt") ? "" : " [-p]");
++	fprintf(stderr, "usage: %s [-n] [-w] [-d] [-f] [-h] [-i]%s%s\n",
++		progname,
++		strcmp(progname, "halt") ? "" : " [-p]",
++		strcmp(progname, "reboot") ? "" : " [-k]");
+ 	fprintf(stderr, "\t-n: don't sync before halting the system\n");
+ 	fprintf(stderr, "\t-w: only write a wtmp reboot record and exit.\n");
+ 	fprintf(stderr, "\t-d: don't write a wtmp record.\n");
+@@ -84,6 +87,8 @@ void usage(void)
+ 	fprintf(stderr, "\t-i: shut down all network interfaces.\n");
+ 	if (!strcmp(progname, "halt"))
+ 		fprintf(stderr, "\t-p: power down the system (if possible, otherwise halt).\n");
++	if (!strcmp(progname, "reboot"))
++		fprintf(stderr, "\t-k: reboot the system using kexec.\n");
+ 	exit(1);
+ }
+ 
+@@ -182,6 +187,7 @@ int main(int argc, char **argv)
+ 	int do_ifdown = 0;
+ 	int do_hddown = 0;
+ 	int do_poweroff = 0;
++	int do_kexec = 0;
+ 	int c;
+ 	char *tm = NULL;
+ 
+@@ -201,7 +207,7 @@ int main(int argc, char **argv)
+ 	/*
+ 	 *	Get flags
+ 	 */
+-	while((c = getopt(argc, argv, ":ihdfnpwt:")) != EOF) {
++	while((c = getopt(argc, argv, ":ihdfnpwkt:")) != EOF) {
+ 		switch(c) {
+ 			case 'n':
+ 				do_sync = 0;
+@@ -225,6 +231,9 @@ int main(int argc, char **argv)
+ 			case 'p':
+ 				do_poweroff = 1;
+ 				break;
++			case 'k':
++				do_kexec = 1;
++				break;
+ 			case 't':
+ 				tm = optarg;
+ 				break;
+@@ -242,10 +251,24 @@ int main(int argc, char **argv)
+ 	(void)chdir("/");
+ 
+ 	if (!do_hard && !do_nothing) {
++		c = get_runlevel();
++
++		/*
++		 *	 We can't reboot using kexec through this path.
++		 */
++		if (c != '6' && do_reboot && do_kexec) {
++			fprintf(stderr, "ERROR: using -k at this"
++				" runlevel requires also -f\n"
++				"  (You probably want instead to reboot"
++				" normally and let your reboot\n"
++				"   script, usually /etc/init.d/reboot,"
++				" specify -k)\n");
++			exit(1);
++		}
++
+ 		/*
+ 		 *	See if we are in runlevel 0 or 6.
+ 		 */
+-		c = get_runlevel();
+ 		if (c != '0' && c != '6')
+ 			do_shutdown(do_reboot ? "-r" : "-h", tm);
+ 	}
+@@ -277,6 +300,15 @@ int main(int argc, char **argv)
+ 	if (do_nothing) exit(0);
+ 
+ 	if (do_reboot) {
++		/*
++		 *	kexec or reboot
++		 */
++		if (do_kexec)
++			init_reboot(BMAGIC_KEXEC);
++
++		/*
++		 *	Fall through if failed
++		 */
+ 		init_reboot(BMAGIC_REBOOT);
+ 	} else {
+ 		/*
+--- a/src/reboot.h
++++ b/src/reboot.h
+@@ -47,5 +47,8 @@
+ #  define BMAGIC_POWEROFF	BMAGIC_HALT
+ #endif
+ 
++/* for kexec support */
++#define BMAGIC_KEXEC  0x45584543
++
+ #define init_reboot(magic)	reboot(magic)
+ 
-- 
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