Centralize/unify version string printing

Signed-off-by: David Oberhollenzer <david.oberhollenzer@tele2.at>

cmd/Makemodule.am

@@ -2,6 +2,7 @@ shutdown_SOURCES = cmd/shutdown.c
 shutdown_CPPFLAGS = $(AM_CPPFLAGS)
 shutdown_CFLAGS = $(AM_CFLAGS)
 shutdown_LDFLAGS = $(AM_LDFLAGS)
+shutdown_LDADD = libinit.a
 
 runsvc_SOURCES = cmd/runsvc/runsvc.c cmd/runsvc/env.c cmd/runsvc/runsvc.h
 runsvc_CPPFLAGS = $(AM_CPPFLAGS)

cmd/shutdown.c

@@ -63,19 +63,6 @@ static NORETURN void usage(const char *progname, int status)
 	exit(status);
 }
 
-static NORETURN void version(const char *progname)
-{
-	fprintf(stdout, 
-"%s (Pygos init) %s\n"
-"Copyright (C) 2018 David Oberhollenzer\n"
-"License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>.\n"
-"This is free software: you are free to change and redistribute it.\n"
-"There is NO WARRANTY, to the extent permitted by law.\n",
-	progname, PACKAGE_VERSION);
-
-	exit(EXIT_SUCCESS);
-}
-
 int main(int argc, char **argv)
 {
 	int c, ret, flags = 0;
@@ -108,7 +95,7 @@ int main(int argc, char **argv)
 			defact = RB_AUTOBOOT;
 			break;
 		case 'V':
-			version(ptr);
+			print_version(ptr);
 		case 'h':
 			usage(ptr, EXIT_SUCCESS);
 		default:

cmd/syslog.c

@@ -72,13 +72,6 @@ static const struct option options[] = {
 
 static const char *shortopt = "hVcf:l:i:";
 
-static const char *versiontext =
-"syslog (Pygos init) "PACKAGE_VERSION"\n"
-"Copyright (C) 2018 David Oberhollenzer\n"
-"License GPLv3+: GNU GPL version 3 or later <https://gnu.org/licenses/gpl.html>.\n"
-"This is free software: you are free to change and redistribute it.\n"
-"There is NO WARRANTY, to the extent permitted by law.\n";
-
 static const char *helptext =
 "Usage: syslog [OPTION]... [STRING]...\n\n"
 "Concatenate the given STRINGs and send a log message to the syslog daemon.\n"
@@ -125,12 +118,6 @@ static NORETURN void usage(int status)
 	exit(status);
 }
 
-static NORETURN void version(void)
-{
-	fputs(versiontext, stdout);
-	exit(EXIT_SUCCESS);
-}
-
 static int readint(const char *str)
 {
 	int x = 0;
@@ -188,7 +175,7 @@ static void process_options(int argc, char **argv)
 		case 'h':
 			usage(EXIT_SUCCESS);
 		case 'V':
-			version();
+			print_version("syslog");
 		default:
 			usage(EXIT_FAILURE);
 		}

lib/Makemodule.am

@@ -3,7 +3,8 @@ HEADRS = lib/include/util.h lib/include/service.h lib/include/telinit.h
 libinit_a_SOURCES = lib/util/delsvc.c lib/util/svcmap.c lib/util/enum_by_name.c
 libinit_a_SOURCES += lib/util/rdsvc.c lib/util/svcscan.c lib/util/mksock.c
 libinit_a_SOURCES += lib/util/del_svc_list.c lib/util/svc_tsort.c
-libinit_a_SOURCES += lib/util/opensock.c lib/util/enum_to_name.c $(HEADRS)
+libinit_a_SOURCES += lib/util/opensock.c lib/util/enum_to_name.c
+libinit_a_SOURCES += lib/util/print_version.c $(HEADRS)
 libinit_a_CPPFLAGS = $(AM_CPPFLAGS)
 libinit_a_CFLAGS = $(AM_CFLAGS)
 

lib/include/util.h

@@ -70,5 +70,8 @@ const char *enum_to_name(const enum_map_t *map, int value);
 */
 int mksock(const char *path, int flags);
 
+/* print a default version info and license string */
+NORETURN void print_version(const char *program);
+
 #endif /* UTIL_H */
 

lib/util/print_version.c

@@ -0,0 +1,37 @@
+/* SPDX-License-Identifier: GPL-3.0-or-later */
+/*
+ * Copyright (C) 2018 - David Oberhollenzer
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+#include <stdlib.h>
+#include <stdio.h>
+
+#include "config.h"
+#include "util.h"
+
+#define GPL_URL "https://gnu.org/licenses/gpl.html"
+
+static const char *version_string =
+"%s (pygos init) " PACKAGE_VERSION "\n"
+"Copyright (C) 2018 David Oberhollenzer\n\n"
+"License GPLv3+: GNU GPL version 3 or later <" GPL_URL ">.\n"
+"This is free software: you are free to change and redistribute it.\n"
+"There is NO WARRANTY, to the extent permitted by law.\n";
+
+void print_version(const char *program)
+{
+	fprintf(stdout, version_string, program);
+	exit(EXIT_SUCCESS);
+}

syslogd/Makemodule.am

@@ -14,6 +14,7 @@ klogd_SOURCES = syslogd/klogd.c
 klogd_CPPFLAGS = $(AM_CPPFLAGS)
 klogd_CFLAGS = $(AM_CFLAGS)
 klogd_LDFLAGS = $(AM_LDFLAGS)
+klogd_LDADD = libinit.a
 
 sbin_PROGRAMS += klogd
 endif

syslogd/klogd.c

@@ -25,6 +25,7 @@
 #include <errno.h>
 
 #include "config.h"
+#include "util.h"
 
 enum {
 	KLOG_CLOSE = 0,
@@ -48,13 +49,6 @@ static const struct option options[] = {
 
 static const char *shortopt = "hVl:";
 
-static const char *versiontext =
-"klogd (Pygos init) "PACKAGE_VERSION"\n"
-"Copyright (C) 2018 David Oberhollenzer\n"
-"License GPLv3+: GNU GPL version 3 or later <https://gnu.org/licenses/gpl.html>.\n"
-"This is free software: you are free to change and redistribute it.\n"
-"There is NO WARRANTY, to the extent permitted by law.\n";
-
 static const char *helptext =
 "Usage: klogd [OPTION]... \n\n"
 "Collect printk() messages from the kernel and forward them to syslogd.\n"
@@ -82,8 +76,7 @@ static void process_options(int argc, char **argv)
 			fputs(helptext, stdout);
 			exit(EXIT_SUCCESS);
 		case 'V':
-			fputs(versiontext, stdout);
+			print_version("klogd");
-			exit(EXIT_SUCCESS);
 		default:
 			fputs("Try `klogd --help' for more information\n",
 			      stderr);

syslogd/syslogd.c

@@ -32,10 +32,6 @@
 #include "syslogd.h"
 #include "util.h"
 
-
-#define GPL_URL "https://gnu.org/licenses/gpl.html"
-
-
 static const struct option long_opts[] = {
 	{ "help", no_argument, NULL, 'h' },
 	{ "version", no_argument, NULL, 'V' },
@@ -49,13 +45,6 @@ static const struct option long_opts[] = {
 
 static const char *short_opts = "hVcrm:u:g:";
 
-const char *version_string =
-"usyslogd (pygos init) " PACKAGE_VERSION "\n"
-"Copyright (C) 2018 David Oberhollenzer\n\n"
-"License GPLv3+: GNU GPL version 3 or later <" GPL_URL ">.\n"
-"This is free software: you are free to change and redistribute it.\n"
-"There is NO WARRANTY, to the extent permitted by law.\n";
-
 const char *usage_string =
 "Usage: usyslogd [OPTIONS..]\n\n"
 "The following options are supported:\n"
@@ -183,8 +172,7 @@ static void process_options(int argc, char **argv)
 			fputs(usage_string, stdout);
 			exit(EXIT_SUCCESS);
 		case 'V':
-			fputs(version_string, stdout);
+			print_version("usyslogd");
-			exit(EXIT_SUCCESS);
 		default:
 			goto fail;
 		}