From 2185f91d88f0666ffa3b1b000b8a078692e5a65c Mon Sep 17 00:00:00 2001
From: Jeffrey Hutzelman <jhutz@cmu.edu>
Date: Tue, 9 Oct 2001 07:32:58 +0000
Subject: [PATCH] add-live-sys-cmd-20011008

The attached patch adds a program named 'livesys' to the venus directory.
  This program has exactly the same interface as 'sys', but actually does a
  pioctl to find out the current sysname instead of printing a value
  compiled into it.  It is intended for sites who want 'sys' to report the
  active, locally-assigned sysname of the machine on which it is run.
---
 src/venus/Makefile.in | 15 +++++++++-
 src/venus/livesys.c   | 78 +++++++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 92 insertions(+), 1 deletion(-)
 create mode 100644 src/venus/livesys.c

diff --git a/src/venus/Makefile.in b/src/venus/Makefile.in
index 37b3db8..1d6cdf2 100644
--- a/src/venus/Makefile.in
+++ b/src/venus/Makefile.in
@@ -69,7 +69,7 @@ CMLIBS=${TOP_LIBDIR}/libsys.a \
 
 LIBS = ${FSLIBS} 
 
-all: fs up fstrace cmdebug kdump kdump64
+all: fs up fstrace cmdebug livesys kdump kdump64
 
 #
 # Build targets
@@ -82,6 +82,9 @@ cacheout.o: cacheout.c
 ${DEST}/bin/fs ${DEST}/root.server/usr/afs/bin/fs: fs
 	${INSTALL} -s $? $@
 
+${DEST}/bin/livesys: livesys
+	${INSTALL} -s $? $@
+
 ${DEST}/bin/up: up
 	${INSTALL} -s $? $@
 
@@ -135,6 +138,11 @@ fs.o: fs.c ${INCLS} AFS_component_version_number.c
 fs: fs.o $(LIBS)
 	${CC} ${CFLAGS} -g -o fs fs.o ${TOP_LIBDIR}/libprot.a $(LIBS) ${XLIBS}
 
+livesys.o: livesys.c ${INCLS} AFS_component_version_number.c
+
+livesys: livesys.c $(LIBS)
+	${CC} -g -o livesys $(CFLAGS) livesys.c $(LIBS) ${XLIBS}
+
 twiddle: twiddle.c $(LIBS)
 	${CC} -g -o twiddle $(CFLAGS) twiddle.c $(LIBS) ${XLIBS}
 
@@ -263,6 +271,7 @@ kdump64 : kdump64.o
 #
 install: \
 	${DESTDIR}${bindir}/fs \
+	${DESTDIR}${bindir}/livesys \
 	${DESTDIR}${afssrvbindir}/fs \
 	${DESTDIR}${bindir}/up \
 	${DESTDIR}${sbindir}/fstrace \
@@ -285,6 +294,9 @@ include ../config/Makefile.version
 ${DESTDIR}${bindir}/fs: fs
 	${INSTALL} -s $? $@
 
+${DESTDIR}${bindir}/livesys: livesys
+	${INSTALL} -s $? $@
+
 ${DESTDIR}${afssrvbindir}/fs: fs
 	${INSTALL} -s $? $@
 
@@ -331,6 +343,7 @@ ${DESTDIR}${sbindir}/kdump64: kdump64
 
 dest: \
 	${DEST}/bin/fs \
+	${DEST}/bin/livesys \
 	${DEST}/root.server/usr/afs/bin/fs \
 	${DEST}/bin/up \
 	${DEST}/etc/fstrace \
diff --git a/src/venus/livesys.c b/src/venus/livesys.c
new file mode 100644
index 0000000..f736bb1
--- /dev/null
+++ b/src/venus/livesys.c
@@ -0,0 +1,78 @@
+/*
+ * Copyright 2000, International Business Machines Corporation and others.
+ * All Rights Reserved.
+ * 
+ * This software has been released under the terms of the IBM Public
+ * License.  For details, see the LICENSE file in the top-level source
+ * directory or online at http://www.openafs.org/dl/license10.html
+ */
+
+#include <afsconfig.h>
+#include <afs/param.h>
+
+RCSID("$Header$");
+
+#include <afs/afs_args.h>
+#include <rx/xdr.h>
+#include <sys/ioctl.h>
+#include <sys/socket.h>
+#include <netdb.h>
+#include <errno.h>
+#include <stdio.h>
+#include <netinet/in.h>
+#include <sys/stat.h>
+#include <afs/stds.h>
+#include <afs/vice.h>
+#include <afs/venus.h>
+#ifdef	AFS_AIX32_ENV
+#include <signal.h>
+#endif
+#include <strings.h>
+
+#define	MAXSIZE	2048
+static char space[MAXSIZE];
+
+int main(argc, argv)
+    int argc;
+    char **argv;
+{
+    afs_int32 code;
+    struct ViceIoctl blob;
+    char *input = space;
+    afs_int32 setp = 0;
+
+#ifdef	AFS_AIX32_ENV
+    /*
+     * The following signal action for AIX is necessary so that in case of a
+     * crash (i.e. core is generated) we can include the user's data section
+     * in the core dump. Unfortunately, by default, only a partial core is
+     * generated which, in many cases, isn't too useful.
+     */
+    struct sigaction nsa;
+
+    sigemptyset(&nsa.sa_mask);
+    nsa.sa_handler = SIG_DFL;
+    nsa.sa_flags = SA_FULLDUMP;
+    sigaction(SIGSEGV, &nsa, NULL);
+#endif
+
+    blob.in = space;
+    blob.out = space;
+    blob.out_size = MAXSIZE;
+    blob.in_size = sizeof(afs_int32);
+    memcpy(space, &setp, sizeof(afs_int32));
+    code = pioctl(0, VIOC_AFS_SYSNAME, &blob, 1);
+    if (code) {
+	fprintf(stderr, "livesys: %s\n", error_message(code));
+	return 1;
+    }
+    input = space;
+    memcpy(&setp, input, sizeof(afs_int32));
+    input += sizeof(afs_int32);
+    if (!setp) {
+	fprintf(stderr, "No sysname name value was found\n");
+	return 1;
+    }
+    printf("%s\n", input);
+    return 0;
+}
-- 
1.9.4