fix "variable 'foo' set but not used" warnings

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

9 files changed, 11 insertions, 27 deletions

diff --git a/archival/libarchive/bz/compress.c b/archival/libarchive/bz/compress.c
index 6f1c70a08..f93671742 100644
--- a/archival/libarchive/bz/compress.c
+++ b/archival/libarchive/bz/compress.c
@@ -251,7 +251,7 @@ void sendMTFValues(EState* s)
 {
         int32_t v, t, i, j, gs, ge, totc, bt, bc, iter;
         int32_t nSelectors, alphaSize, minLen, maxLen, selCtr;
-        int32_t nGroups, nBytes;
+        int32_t nGroups;
 
         /*
          * uint8_t len[BZ_N_GROUPS][BZ_MAX_ALPHA_SIZE];
@@ -512,7 +512,6 @@ void sendMTFValues(EState* s)
                         }
                 }
 
-                nBytes = s->numZ;
                 bsW(s, 16, inUse16);
 
                 inUse16 <<= (sizeof(int)*8 - 16); /* move 15th bit into sign bit */
@@ -528,7 +527,6 @@ void sendMTFValues(EState* s)
         }
 
         /*--- Now the selectors. ---*/
-        nBytes = s->numZ;
         bsW(s, 3, nGroups);
         bsW(s, 15, nSelectors);
         for (i = 0; i < nSelectors; i++) {
@@ -538,8 +536,6 @@ void sendMTFValues(EState* s)
         }
 
         /*--- Now the coding tables. ---*/
-        nBytes = s->numZ;
-
         for (t = 0; t < nGroups; t++) {
                 int32_t curr = s->len[t][0];
                 bsW(s, 5, curr);
@@ -551,7 +547,6 @@ void sendMTFValues(EState* s)
         }
 
         /*--- And finally, the block data proper ---*/
-        nBytes = s->numZ;
         selCtr = 0;
         gs = 0;
         while (1) {
diff --git a/e2fsprogs/fsck.c b/e2fsprogs/fsck.c
index b4257a2ad..fcbdb5989 100644
--- a/e2fsprogs/fsck.c
+++ b/e2fsprogs/fsck.c
@@ -317,7 +317,6 @@ static void load_fs_info(const char *filename)
 {
         FILE *fstab;
         struct mntent mte;
-        struct fs_info *fs;
 
         fstab = setmntent(filename, "r");
         if (!fstab) {
@@ -330,7 +329,7 @@ static void load_fs_info(const char *filename)
                 //bb_info_msg("CREATE[%s][%s][%s][%s][%d]", mte.mnt_fsname, mte.mnt_dir,
                 //      mte.mnt_type, mte.mnt_opts,
                 //      mte.mnt_passno);
-                fs = create_fs_device(mte.mnt_fsname, mte.mnt_dir,
+                create_fs_device(mte.mnt_fsname, mte.mnt_dir,
                         mte.mnt_type, mte.mnt_opts,
                         mte.mnt_passno);
         }
diff --git a/editors/vi.c b/editors/vi.c
index fd8bd0f78..638b3b733 100644
--- a/editors/vi.c
+++ b/editors/vi.c
@@ -536,7 +536,6 @@ static void edit_file(char *fn)
 #define cur_line edit_file__cur_line
 #endif
         int c;
-        int size;
 #if ENABLE_FEATURE_VI_USE_SIGNALS
         int sig;
 #endif
@@ -545,7 +544,6 @@ static void edit_file(char *fn)
         rawmode();
         rows = 24;
         columns = 80;
-        size = 0;
         IF_FEATURE_VI_ASK_TERMINAL(G.get_rowcol_error =) query_screen_dimensions();
 #if ENABLE_FEATURE_VI_ASK_TERMINAL
         if (G.get_rowcol_error /* TODO? && no input on stdin */) {
diff --git a/libbb/dump.c b/libbb/dump.c
index 1b1d03a66..919fe135c 100644
--- a/libbb/dump.c
+++ b/libbb/dump.c
@@ -99,7 +99,7 @@ static NOINLINE int bb_dump_size(FS *fs)
 static NOINLINE void rewrite(priv_dumper_t *dumper, FS *fs)
 {
         enum { NOTOKAY, USEBCNT, USEPREC } sokay;
-        PR *pr, **nextpr = NULL;
+        PR *pr;
         FU *fu;
         char *p1, *p2, *p3;
         char savech, *fmtp;
@@ -111,15 +111,12 @@ static NOINLINE void rewrite(priv_dumper_t *dumper, FS *fs)
                  * break each format unit into print units; each
                  * conversion character gets its own.
                  */
-                for (nconv = 0, fmtp = fu->fmt; *fmtp; nextpr = &pr->nextpr) {
+                for (nconv = 0, fmtp = fu->fmt; *fmtp; ) {
                         /* NOSTRICT */
                         /* DBU:[dvae@cray.com] zalloc so that forward ptrs start out NULL*/
                         pr = xzalloc(sizeof(PR));
                         if (!fu->nextpr)
                                 fu->nextpr = pr;
-                        /* ignore nextpr -- its unused inside the loop and is
-                         * uninitialized 1st time through.
-                         */
 
                         /* skip preceding text and up to the next % sign */
                         for (p1 = fmtp; *p1 && *p1 != '%'; ++p1)
diff --git a/miscutils/last_fancy.c b/miscutils/last_fancy.c
index 7e61b7691..dc09b65fb 100644
--- a/miscutils/last_fancy.c
+++ b/miscutils/last_fancy.c
@@ -161,11 +161,10 @@ int last_main(int argc UNUSED_PARAM, char **argv)
         time_t boot_time;
         time_t down_time;
         int file;
-        unsigned opt;
         smallint going_down;
         smallint boot_down;
 
-        opt = getopt32(argv, "Wf:" /* "H" */, &filename);
+        /*opt =*/ getopt32(argv, "Wf:" /* "H" */, &filename);
 #ifdef BUT_UTIL_LINUX_LAST_HAS_NO_SUCH_OPT
         if (opt & LAST_OPT_H) {
                 /* Print header line */
diff --git a/networking/ftpgetput.c b/networking/ftpgetput.c
index 66316e21f..f63df55f4 100644
--- a/networking/ftpgetput.c
+++ b/networking/ftpgetput.c
@@ -60,7 +60,7 @@ struct globals {
         FILE *control_stream;
         int verbose_flag;
         int do_continue;
-        char buf[1]; /* actually [BUFSZ] */
+        char buf[4]; /* actually [BUFSZ] */
 } FIX_ALIASING;
 #define G (*(struct globals*)&bb_common_bufsiz1)
 enum { BUFSZ = COMMON_BUFSIZE - offsetof(struct globals, buf) };
@@ -105,7 +105,7 @@ static int ftpcmd(const char *s1, const char *s2)
         }
 
         do {
-                strcpy(buf, "EOF");
+                strcpy(buf, "EOF"); /* for ftp_die */
                 if (fgets(buf, BUFSZ - 2, control_stream) == NULL) {
                         ftp_die(NULL);
                 }
@@ -316,7 +316,6 @@ static const char ftpgetput_longopts[] ALIGN1 =
 int ftpgetput_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
 int ftpgetput_main(int argc UNUSED_PARAM, char **argv)
 {
-        unsigned opt;
         const char *port = "ftp";
         /* socket to ftp server */
 
@@ -345,7 +344,7 @@ int ftpgetput_main(int argc UNUSED_PARAM, char **argv)
         applet_long_options = ftpgetput_longopts;
 #endif
         opt_complementary = "-2:vv:cc"; /* must have 2 to 3 params; -v and -c count */
-        opt = getopt32(argv, "cvu:p:P:", &user, &password, &port,
+        getopt32(argv, "cvu:p:P:", &user, &password, &port,
                                         &verbose_flag, &do_continue);
         argv += optind;
 
diff --git a/procps/powertop.c b/procps/powertop.c
index bfe5a9568..008cdfca4 100644
--- a/procps/powertop.c
+++ b/procps/powertop.c
@@ -393,11 +393,9 @@ static NOINLINE int process_timer_stats(void)
         char buf[128];
         char line[15 + 3 + 128];
         int n;
-        ullong totalticks;
         FILE *fp;
 
         buf[0] = '\0';
-        totalticks = 0;
 
         n = 0;
         fp = NULL;
diff --git a/runit/sv.c b/runit/sv.c
index 322688a36..5b01c875c 100644
--- a/runit/sv.c
+++ b/runit/sv.c
@@ -437,7 +437,6 @@ static int control(const char *a)
 int sv_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
 int sv_main(int argc UNUSED_PARAM, char **argv)
 {
-        unsigned opt;
         char *x;
         char *action;
         const char *varservice = CONFIG_SV_DEFAULT_SERVICE_DIR;
@@ -458,7 +457,7 @@ int sv_main(int argc UNUSED_PARAM, char **argv)
         if (x) waitsec = xatou(x);
 
         opt_complementary = "w+:vv"; /* -w N, -v is a counter */
-        opt = getopt32(argv, "w:v", &waitsec, &verbose);
+        getopt32(argv, "w:v", &waitsec, &verbose);
         argv += optind;
         action = *argv++;
         if (!action || !*argv) bb_show_usage();
diff --git a/shell/hush.c b/shell/hush.c
index 4c348ec2b..9cc86fa9a 100644
--- a/shell/hush.c
+++ b/shell/hush.c
@@ -4517,11 +4517,11 @@ static struct pipe *parse_stream(char **pstring,
                         break;
 #if ENABLE_HUSH_TICK
                 case '`': {
-                        unsigned pos;
+                        USE_FOR_NOMMU(unsigned pos;)
 
                         o_addchr(&dest, SPECIAL_VAR_SYMBOL);
                         o_addchr(&dest, '`');
-                        pos = dest.length;
+                        USE_FOR_NOMMU(pos = dest.length;)
                         if (!add_till_backquote(&dest, input, /*in_dquote:*/ 0))
                                 goto parse_error;
 # if !BB_MMU