Re: Introducing a poweroff(8) command
From: Giorgos Keramidas (keramida_at_ceid.upatras.gr)
Date: 08/21/04
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Date: Sat, 21 Aug 2004 23:22:52 +0300 To: freebsd-arch@freebsd.org
On 2004-08-21 22:16, Giorgos Keramidas <keramida@freebsd.org> wrote:
> Hi guys,
>
> In response to PR misc/70476 about `halt -p' I wrote a simple patch to
> introduce a "poweroff" command that will default to "halt -p" behavior
> and inhibit the need for changing the default behavior of halt(8).
>
> o Does this look ok to you all?
>
> o Should I suggest using it as a workaround of the behavior
> described in the PR?
It would be nice if I also included the patch :-?
%%%
Add a hard link to reboot(8) called "poweroff" which defaults to the
same behavior as "halt -p". Also fix a related bug while here. When
called as "halt -p" the previous reboot program would not disallow the
use of -d for saving kernel dumps (it would inhibit dumps without the
-p option though).
Index: Makefile
===================================================================
RCS file: /home/ncvs/src/sbin/reboot/Makefile,v
retrieving revision 1.13
diff -u -r1.13 Makefile
--- Makefile 22 Mar 2004 00:52:27 -0000 1.13
+++ Makefile 21 Aug 2004 18:45:36 -0000
@@ -14,8 +14,8 @@
MLINKS+= boot_i386.8 boot.8
.endif
-LINKS= ${BINDIR}/reboot ${BINDIR}/halt ${BINDIR}/reboot ${BINDIR}/fastboot \
- ${BINDIR}/reboot ${BINDIR}/fasthalt
+LINKS= ${BINDIR}/reboot ${BINDIR}/halt ${BINDIR}/reboot ${BINDIR}/poweroff \
+ ${BINDIR}/reboot ${BINDIR}/fastboot ${BINDIR}/reboot ${BINDIR}/fasthalt
SCRIPTS= nextboot.sh
Index: reboot.8
===================================================================
RCS file: /home/ncvs/src/sbin/reboot/reboot.8,v
retrieving revision 1.22
diff -u -r1.22 reboot.8
--- reboot.8 9 Apr 2004 19:58:35 -0000 1.22
+++ reboot.8 17 Aug 2004 22:04:34 -0000
@@ -34,6 +34,7 @@
.Sh NAME
.Nm reboot ,
.Nm halt ,
+.Nm poweroff ,
.Nm fastboot ,
.Nm fasthalt
.Nd stopping and restarting the system
@@ -41,6 +42,9 @@
.Nm halt
.Op Fl lnqp
.Op Fl k Ar kernel
+.Nm poweroff
+.Op Fl lnqp
+.Op Fl k Ar kernel
.Nm
.Op Fl dlnqp
.Op Fl k Ar kernel
@@ -52,7 +56,8 @@
.Op Fl k Ar kernel
.Sh DESCRIPTION
The
-.Nm halt
+.Nm halt ,
+.Nm poweroff
and
.Nm
utilities flush the file system cache to disk, send all running processes
@@ -91,9 +96,10 @@
This option is intended for applications such as
.Xr shutdown 8 ,
that call
-.Nm
-or
+.Nm ,
.Nm halt
+or
+.Nm poweroff
and log this themselves.
.It Fl n
The file system cache is not flushed.
@@ -106,6 +112,9 @@
This option should probably not be used.
.It Fl p
The system will turn off the power if it can.
+This is the default action if
+.Nm poweroff
+is called.
If the power down action fails, the system
will halt or reboot normally, depending on whether
.Nm halt
Index: reboot.c
===================================================================
RCS file: /home/ncvs/src/sbin/reboot/reboot.c,v
retrieving revision 1.20
diff -u -r1.20 reboot.c
--- reboot.c 9 Apr 2004 19:58:35 -0000 1.20
+++ reboot.c 17 Aug 2004 21:55:57 -0000
@@ -70,9 +70,13 @@
char *kernel, *p;
const char *user;
- if (strstr((p = rindex(*argv, '/')) ? p + 1 : *argv, "halt")) {
+ p = rindex(*argv, '/') ? p + 1 : *argv;
+ if (strcmp(p, "halt") == 0) {
dohalt = 1;
howto = RB_HALT;
+ } else if (strcmp(p, "poweroff") == 0) {
+ dohalt = 1;
+ howto = RB_POWEROFF;
} else
howto = 0;
kflag = lflag = nflag = qflag = 0;
@@ -108,6 +112,8 @@
if ((howto & (RB_DUMP | RB_HALT)) == (RB_DUMP | RB_HALT))
errx(1, "cannot dump (-d) when halting; must reboot instead");
+ if ((howto & (RB_DUMP | RB_POWEROFF)) == (RB_DUMP | RB_POWEROFF))
+ errx(1, "cannot dump (-d) when powering off; must reboot instead");
if (geteuid()) {
errno = EPERM;
err(1, NULL);
%%%
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