nilfs-tune: do not display version information by default

Like other commands, add the "-V" option to display version information
and suppress output during normal execution.

Also update the manpage and help messages.

Signed-off-by: Ryusuke Konishi <konishi.ryusuke@gmail.com>

Author: konis

man/nilfs-tune.8

@@ -1,6 +1,6 @@
 .\"  Copyright (C) 2010 Jiro SEKIBA <jir@unicus.jp>
 .\"
-.TH NILFS-TUNE 8 "Apr 2014" "nilfs-utils version 2.2"
+.TH NILFS-TUNE 8 "Feb 2024" "nilfs-utils version 2.3"
 .SH NAME
 nilfs-tune \- adjust tunable file system parameters on NILFS file system
 .SH SYNOPSIS
@@ -60,6 +60,9 @@ like this: "c1b9d5a2-f162-11cf-9ece-0020afc76f16".
 .TP
 .B \-h
 Display help message and exit.
+.TP
+.B \-V
+Display version and exit.
 .SH AUTHOR
 Jiro SEKIBA <jir@unicus.jp>
 .SH AVAILABILITY

sbin/nilfs-tune.c

@@ -89,7 +89,7 @@ static void nilfs_tune_usage(void)
 	printf("Usage: nilfs-tune -l device\n"
 	       "       nilfs-tune [-f] [-i interval] [-m block_max] [-L volume_name]\n"
 	       "                  [-O [^]feature[,...]] [-U UUID] device\n"
-	       "       nilfs-tune [-h]\n");
+	       "       nilfs-tune [-h|-V]\n");
 }
 
 static const uint64_t ok_features[NILFS_MAX_FEATURE_TYPES] = {
@@ -147,7 +147,7 @@ static void parse_options(int argc, char *argv[],
 	opts->force = 0;
 	opts->fs_features = NULL;
 
-	while ((c = getopt(argc, argv, "flhi:L:m:O:U:")) != EOF) {
+	while ((c = getopt(argc, argv, "flhi:L:m:O:U:V")) != EOF) {
 		switch (c) {
 		case 'f':
 			opts->force = 1;
@@ -201,6 +201,10 @@ static void parse_options(int argc, char *argv[],
 			opts->mask |= NILFS_SB_UUID;
 			opts->flags = O_RDWR;
 			break;
+		case 'V':
+			printf("nilfs-tune (nilfs-utils %s)\n", VERSION);
+			exit(0);
+			break;
 		default:
 			nilfs_tune_usage();
 			exit(EXIT_FAILURE);
@@ -580,7 +584,6 @@ int main(int argc, char *argv[])
 	struct nilfs_tune_options opts;
 	const char *device;
 
-	printf("nilfs-tune %s\n", VERSION);
 	if (argc < 2) {
 		nilfs_tune_usage();
 		exit(EXIT_SUCCESS);