main() does not need to be declared.
Also mark usage() as __dead in fsck_msdos and fsdb.
Index: fsck/fsck.c
===================================================================
RCS file: /cvs/src/sbin/fsck/fsck.c,v
retrieving revision 1.38
diff -u -p -r1.38 fsck.c
--- fsck/fsck.c 23 Nov 2015 19:19:29 -0000 1.38
+++ fsck/fsck.c 2 Jan 2016 16:24:39 -0000
@@ -70,8 +70,6 @@ static int maxrun;
static char *options;
static int flags;
-int main(int, char *[]);
-
static int checkfs(const char *, const char *, const char *, void *, pid_t *);
static int selected(const char *);
static void addoption(char *);
Index: fsck_msdos/main.c
===================================================================
RCS file: /cvs/src/sbin/fsck_msdos/main.c,v
retrieving revision 1.22
diff -u -p -r1.22 main.c
--- fsck_msdos/main.c 23 Nov 2015 19:19:30 -0000 1.22
+++ fsck_msdos/main.c 2 Jan 2016 16:24:39 -0000
@@ -43,10 +43,9 @@ int alwaysyes; /* assume "yes" for all
int preen; /* set when preening */
int rdonly; /* device is opened read only (supersedes above) */
-static void usage(void);
-int main(int, char **);
+__dead static void usage(void);
-static void
+__dead static void
usage(void)
{
errexit("usage: fsck_msdos [-fnpy] filesystem\n");
Index: fsdb/fsdb.c
===================================================================
RCS file: /cvs/src/sbin/fsdb/fsdb.c,v
retrieving revision 1.29
diff -u -p -r1.29 fsdb.c
--- fsdb/fsdb.c 20 Jan 2015 18:22:21 -0000 1.29
+++ fsdb/fsdb.c 2 Jan 2016 16:24:39 -0000
@@ -55,8 +55,7 @@
extern char *__progname; /* from crt0.o */
-int main(int, char *[]);
-static void usage(void);
+__dead static void usage(void);
static int cmdloop(void);
static int helpfn(int, char *[]);
static char *prompt(EditLine *);
@@ -70,7 +69,7 @@ int returntosingle = 0;
union dinode *curinode;
ino_t curinum;
-static void
+__dead static void
usage(void)
{
fprintf(stderr, "usage: %s [-d] -f fsname\n", __progname);
Index: ncheck_ffs/ncheck_ffs.c
===================================================================
RCS file: /cvs/src/sbin/ncheck_ffs/ncheck_ffs.c,v
retrieving revision 1.52
diff -u -p -r1.52 ncheck_ffs.c
--- ncheck_ffs/ncheck_ffs.c 23 Nov 2015 19:19:30 -0000 1.52
+++ ncheck_ffs/ncheck_ffs.c 2 Jan 2016 16:24:39 -0000
@@ -119,7 +119,6 @@ int matchino(const void *, const void *)
int matchcache(const void *, const void *);
void cacheino(ufsino_t, void *);
void *cached(ufsino_t);
-int main(int, char *[]);
char *rawname(char *);
void format_entry(const char *, struct direct *);
--
Michal Mazurek
