[PATCH 6/7] Move cmdline helper functions to fsverity.c

[Jes Sorensen <jes.sorensen@gmail.com>]

From: Jes Sorensen <jsorensen@fb.com>

There is no need for these to live in the shared library. In addition
move get_default_block_size() to the library and rename it appropriately.

Signed-off-by: Jes Sorensen <jsorensen@fb.com>
---
 cmd_sign.c |  2 +-
 fsverity.c | 25 +++++++++----------------
 fsverity.h |  8 +-------
 util.c     | 13 +++++++++++++
 4 files changed, 24 insertions(+), 24 deletions(-)

diff --git a/cmd_sign.c b/cmd_sign.c
index 42779f2..a0bd168 100644
--- a/cmd_sign.c
+++ b/cmd_sign.c
@@ -497,7 +497,7 @@ int fsverity_cmd_sign(char *filename, const struct fsverity_hash_alg *hash_alg,
 	}
 
 	if (block_size == 0)
-		block_size = get_default_block_size();
+		block_size = fsverity_get_default_block_size();
 
 	if (keyfile == NULL) {
 		status = -EINVAL;
diff --git a/fsverity.c b/fsverity.c
index f0e94bf..45bf0cc 100644
--- a/fsverity.c
+++ b/fsverity.c
@@ -18,6 +18,12 @@
 #include "fsverity.h"
 #include "hash_algs.h"
 
+struct fsverity_command;
+
+static bool parse_block_size_option(const char *arg, u32 *size_ptr);
+static bool parse_salt_option(const char *arg, u8 **salt_ptr, u32 *salt_size_ptr);
+static void usage(const struct fsverity_command *cmd, FILE *fp);
+
 enum {
 	OPT_HASH_ALG,
 	OPT_BLOCK_SIZE,
@@ -310,7 +316,7 @@ int wrap_cmd_enable(const struct fsverity_command *cmd,
 		arg.hash_algorithm = FS_VERITY_HASH_ALG_DEFAULT;
 
 	if (arg.block_size == 0)
-		arg.block_size = get_default_block_size();
+		arg.block_size = fsverity_get_default_block_size();
 
 	status = fsverity_cmd_enable(argv[0], &arg);
 
@@ -437,7 +443,7 @@ static const struct fsverity_command *find_command(const char *name)
 	return NULL;
 }
 
-bool parse_block_size_option(const char *arg, u32 *size_ptr)
+static bool parse_block_size_option(const char *arg, u32 *size_ptr)
 {
 	char *end;
 	unsigned long n = strtoul(arg, &end, 10);
@@ -455,7 +461,7 @@ bool parse_block_size_option(const char *arg, u32 *size_ptr)
 	return true;
 }
 
-bool parse_salt_option(const char *arg, u8 **salt_ptr, u32 *salt_size_ptr)
+static bool parse_salt_option(const char *arg, u8 **salt_ptr, u32 *salt_size_ptr)
 {
 	if (*salt_ptr != NULL) {
 		error_msg("--salt can only be specified once");
@@ -470,19 +476,6 @@ bool parse_salt_option(const char *arg, u8 **salt_ptr, u32 *salt_size_ptr)
 	return true;
 }
 
-u32 get_default_block_size(void)
-{
-	long n = sysconf(_SC_PAGESIZE);
-
-	if (n <= 0 || n >= INT_MAX || !is_power_of_2(n)) {
-		fprintf(stderr,
-			"Warning: invalid _SC_PAGESIZE (%ld).  Assuming 4K blocks.\n",
-			n);
-		return 4096;
-	}
-	return n;
-}
-
 int main(int argc, char *argv[])
 {
 	const struct fsverity_command *cmd;
diff --git a/fsverity.h b/fsverity.h
index e490c25..bb2f337 100644
--- a/fsverity.h
+++ b/fsverity.h
@@ -8,8 +8,6 @@
 #include "hash_algs.h"
 #include "fsverity_uapi.h"
 
-struct fsverity_command;
-
 /*
  * Format in which verity file measurements are signed.  This is the same as
  * 'struct fsverity_digest', except here some magic bytes are prepended to
@@ -24,7 +22,7 @@ struct fsverity_signed_digest {
 };
 
 
-void usage(const struct fsverity_command *cmd, FILE *fp);
+u32 fsverity_get_default_block_size(void);
 
 int fsverity_cmd_enable(char *filename, struct fsverity_enable_arg *arg);
 int fsverity_cmd_measure(char *filename, struct fsverity_digest *d);
@@ -34,8 +32,4 @@ int fsverity_cmd_sign(char *filename, const struct fsverity_hash_alg *hash_alg,
 		      struct fsverity_signed_digest **retdigest,
 		      u8 **sig, u32 *sig_size);
 
-bool parse_block_size_option(const char *arg, u32 *size_ptr);
-u32 get_default_block_size(void);
-bool parse_salt_option(const char *arg, u8 **salt_ptr, u32 *salt_size_ptr);
-
 #endif /* COMMANDS_H */
diff --git a/util.c b/util.c
index 2218f2e..e4ccd2a 100644
--- a/util.c
+++ b/util.c
@@ -213,3 +213,16 @@ void bin2hex(const u8 *bin, size_t bin_len, char *hex)
 	}
 	*hex = '\0';
 }
+
+u32 fsverity_get_default_block_size(void)
+{
+	long n = sysconf(_SC_PAGESIZE);
+
+	if (n <= 0 || n >= INT_MAX || !is_power_of_2(n)) {
+		fprintf(stderr,
+			"Warning: invalid _SC_PAGESIZE (%ld).  Assuming 4K blocks.\n",
+			n);
+		return 4096;
+	}
+	return n;
+}
-- 
2.24.1