more of -Wall fixes from Cristian Ionescu-Idbohrn.

Some are fixing real bugs.

function                                             old     new   delta
syslogd_main                                         938     958     +20
get_signum                                           136     143      +7
obj_load                                             777     782      +5
recv_from_to                                         210     214      +4
get_next_block                                      1795    1799      +4
display_topmem_process_list                         1117    1121      +4
logread_main                                         484     487      +3
buffer_fill_and_print                                 73      76      +3
kill_main                                            687     689      +2
ll_remember_index                                    240     241      +1
do_stats                                             452     453      +1
if_readconf                                          166     165      -1
display_process_list                                1192    1191      -1
run_applet_and_exit                                  507     505      -2
print_signames                                        33      31      -2
parse_one_line                                      1092    1090      -2
find_out_spec                                         57      55      -2
add_ksymoops_symbols                                 421     419      -2
ash_main                                            1407    1402      -5
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 11/8 up/down: 54/-17)            Total: 37 bytes

archival/libunarchive/archive_xread_all_eof.c

@@ -12,7 +12,7 @@ ssize_t archive_xread_all_eof(archive_handle_t *archive_handle,
 	ssize_t size;
 
 	size = full_read(archive_handle->src_fd, buf, count);
-	if (size != 0 && size != count) {
+	if (size != 0 && size != (ssize_t)count) {
 		bb_error_msg_and_die("short read: %u of %u",
 				(unsigned)size, (unsigned)count);
 	}

archival/libunarchive/decompress_bunzip2.c

@@ -103,7 +103,7 @@ static unsigned get_bits(bunzip_data *bd, int bits_wanted)
 	/* If we need to get more data from the byte buffer, do so.  (Loop getting
 	   one byte at a time to enforce endianness and avoid unaligned access.) */
 
-	while (bd->inbufBitCount < bits_wanted) {
+	while ((int)(bd->inbufBitCount) < bits_wanted) {
 
 		/* If we need to read more data from file into byte buffer, do so */
 
@@ -172,7 +172,7 @@ static int get_next_block(bunzip_data *bd)
 
 	if (get_bits(bd, 1)) return RETVAL_OBSOLETE_INPUT;
 	origPtr = get_bits(bd, 24);
-	if (origPtr > dbufSize) return RETVAL_DATA_ERROR;
+	if ((int)origPtr > dbufSize) return RETVAL_DATA_ERROR;
 
 	/* mapping table: if some byte values are never used (encoding things
 	   like ascii text), the compression code removes the gaps to have fewer
@@ -368,7 +368,7 @@ static int get_next_block(bunzip_data *bd)
 		   j = get_bits(bd, hufGroup->maxLen);
 		 */
 
-		while (bd->inbufBitCount < hufGroup->maxLen) {
+		while ((int)(bd->inbufBitCount) < hufGroup->maxLen) {
 			if (bd->inbufPos == bd->inbufCount) {
 				j = get_bits(bd, hufGroup->maxLen);
 				goto got_huff_bits;
@@ -505,7 +505,7 @@ static int get_next_block(bunzip_data *bd)
 	   it doesn't qualify as a run (hence writeRunCountdown=5). */
 
 	if (dbufCount) {
-		if (origPtr >= dbufCount) return RETVAL_DATA_ERROR;
+		if ((int)origPtr >= dbufCount) return RETVAL_DATA_ERROR;
 		bd->writePos = dbuf[origPtr];
 	    bd->writeCurrent = (unsigned char)(bd->writePos & 0xff);
 		bd->writePos >>= 8;

archival/libunarchive/decompress_unlzma.c

@@ -329,7 +329,7 @@ unpack_lzma_stream(int src_fd, int dst_fd)
 			if (buffer_pos == header.dict_size) {
 				buffer_pos = 0;
 				global_pos += header.dict_size;
-				if (full_write(dst_fd, buffer, header.dict_size) != header.dict_size)
+				if (full_write(dst_fd, buffer, header.dict_size) != (ssize_t)header.dict_size)
 					goto bad;
 				USE_DESKTOP(total_written += header.dict_size;)
 			}
@@ -480,7 +480,7 @@ unpack_lzma_stream(int src_fd, int dst_fd)
 				if (buffer_pos == header.dict_size) {
 					buffer_pos = 0;
 					global_pos += header.dict_size;
-					if (full_write(dst_fd, buffer, header.dict_size) != header.dict_size)
+					if (full_write(dst_fd, buffer, header.dict_size) != (ssize_t)header.dict_size)
 						goto bad;
 					USE_DESKTOP(total_written += header.dict_size;)
 				}
@@ -489,7 +489,7 @@ unpack_lzma_stream(int src_fd, int dst_fd)
 		}
 	}
 
-	if (full_write(dst_fd, buffer, buffer_pos) != buffer_pos) {
+	if (full_write(dst_fd, buffer, buffer_pos) != (ssize_t)buffer_pos) {
  bad:
 		rc_free(rc);
 		return -1;

archival/libunarchive/decompress_unzip.c

@@ -922,7 +922,7 @@ static int inflate_block(STATE_PARAM smallint *e)
 /* Two callsites, both in inflate_get_next_window */
 static void calculate_gunzip_crc(STATE_PARAM_ONLY)
 {
-	int n;
+	unsigned n;
 	for (n = 0; n < gunzip_outbuf_count; n++) {
 		gunzip_crc = gunzip_crc_table[((int) gunzip_crc ^ (gunzip_window[n])) & 0xff] ^ (gunzip_crc >> 8);
 	}
@@ -1003,7 +1003,7 @@ inflate_unzip_internal(STATE_PARAM int in, int out)
 	while (1) {
 		int r = inflate_get_next_window(PASS_STATE_ONLY);
 		nwrote = full_write(out, gunzip_window, gunzip_outbuf_count);
-		if (nwrote != gunzip_outbuf_count) {
+		if (nwrote != (ssize_t)gunzip_outbuf_count) {
 			bb_perror_msg("write");
 			n = -1;
 			goto ret;
@@ -1064,7 +1064,7 @@ static int top_up(STATE_PARAM unsigned n)
 {
 	int count = bytebuffer_size - bytebuffer_offset;
 
-	if (count < n) {
+	if (count < (int)n) {
 		memmove(bytebuffer, &bytebuffer[bytebuffer_offset], count);
 		bytebuffer_offset = 0;
 		bytebuffer_size = full_read(gunzip_src_fd, &bytebuffer[count], bytebuffer_max - count);

include/libbb.h

@@ -1367,7 +1367,7 @@ extern const char bb_default_login_shell[];
 #undef isdigit
 #define isdigit(a) ((unsigned)((a) - '0') <= 9)
 
-#define ARRAY_SIZE(x) (sizeof(x) / sizeof((x)[0]))
+#define ARRAY_SIZE(x) ((unsigned)(sizeof(x) / sizeof((x)[0])))
 
 
 #if __GNUC_PREREQ(4,1)

libbb/appletlib.c

@@ -598,7 +598,7 @@ static void install_links(const char *busybox, int use_symbolic_links)
 
 	int (*lf)(const char *, const char *);
 	char *fpc;
-	int i;
+	unsigned i;
 	int rc;
 
 	lf = link;

libbb/lineedit.c

@@ -199,7 +199,7 @@ static void cmdedit_set_out_char(int next_char)
 	{
 		bb_putchar(c);
 	}
-	if (++cmdedit_x >= cmdedit_termw) {
+	if (++cmdedit_x >= (int)cmdedit_termw) {
 		/* terminal is scrolled down */
 		cmdedit_y++;
 		cmdedit_x = 0;
@@ -861,7 +861,8 @@ static void input_tab(smallint *lastWasTab)
 			exe_n_cwd_tab_completion(matchBuf, find_type);
 		/* Sort, then remove any duplicates found */
 		if (matches) {
-			int i, n = 0;
+			unsigned i;
+			int n = 0;
 			qsort_string_vector(matches, num_matches);
 			for (i = 0; i < num_matches - 1; ++i) {
 				if (matches[i] && matches[i+1]) { /* paranoia */

libbb/u_signal_names.c

@@ -123,14 +123,14 @@ static const char signals[][7] = {
 
 int get_signum(const char *name)
 {
-	int i;
+	unsigned i;
 
 	i = bb_strtou(name, NULL, 10);
 	if (!errno)
 		return i;
 	if (strncasecmp(name, "SIG", 3) == 0)
 		name += 3;
-	for (i = 0; (size_t)i < ARRAY_SIZE(signals); i++)
+	for (i = 0; i < ARRAY_SIZE(signals); i++)
 		if (strcasecmp(name, signals[i]) == 0)
 			return i;
 
@@ -170,9 +170,9 @@ const char *get_signame(int number)
 
 void print_signames(void)
 {
-	int signo;
+	unsigned signo;
 
-	for (signo = 1; (size_t)signo < ARRAY_SIZE(signals); signo++) {
+	for (signo = 1; signo < ARRAY_SIZE(signals); signo++) {
 		const char *name = signals[signo];
 		if (name[0])
 			puts(name);

libbb/udp_io.c

@@ -113,7 +113,7 @@ recv_from_to(int fd, void *buf, size_t len, int flags,
 	} u;
 	struct cmsghdr *cmsgptr;
 	struct msghdr msg;
-	socklen_t recv_length;
+	ssize_t recv_length;
 
 	iov[0].iov_base = buf;
 	iov[0].iov_len = len;

loginutils/getty.c

@@ -479,7 +479,7 @@ static char *get_logname(char *logname, unsigned size_logname,
 			default:
 				if (!isascii(ascval) || !isprint(ascval)) {
 					/* ignore garbage characters */
-				} else if (bp - logname >= size_logname - 1) {
+				} else if ((int)(bp - logname) >= size_logname - 1) {
 					bb_error_msg_and_die("%s: input overrun", op->tty);
 				} else {
 					full_write(1, &c, 1); /* echo the character */

miscutils/crond.c

@@ -423,7 +423,7 @@ static char *ParseField(char *user, char *ary, int modvalue, int off,
 
 static void FixDayDow(CronLine *line)
 {
-	size_t i;
+	unsigned i;
 	int weekUsed = 0;
 	int daysUsed = 0;
 

miscutils/hdparm.c

@@ -1486,7 +1486,8 @@ static const char xfermode_name[][5] ALIGN1 = {
 
 static int translate_xfermode(const char *name)
 {
-	int val, i;
+	int val;
+	unsigned i;
 
 	for (i = 0; i < ARRAY_SIZE(xfermode_val); i++) {
 		if (!strncmp(name, xfermode_name[i], 5))

miscutils/less.c

@@ -297,7 +297,7 @@ static void read_lines(void)
 					new_linepos += 7;
 					new_linepos &= (~7);
 				}
-				if (new_linepos >= w)
+				if ((int)new_linepos >= w)
 					break;
 				linepos = new_linepos;
 			}
@@ -415,7 +415,7 @@ static void m_status_print(void)
 	printf(" lines %i-%i/%i ",
 			cur_fline + 1, cur_fline + max_displayed_line + 1,
 			max_fline + 1);
-	if (cur_fline >= max_fline - max_displayed_line) {
+	if (cur_fline >= (int)(max_fline - max_displayed_line)) {
 		printf("(END)"NORMAL);
 		if (num_files > 1 && current_file != num_files)
 			printf(HIGHLIGHT" - next: %s"NORMAL, files[current_file]);
@@ -444,7 +444,7 @@ static void status_print(void)
 #endif
 
 	clear_line();
-	if (cur_fline && cur_fline < max_fline - max_displayed_line) {
+	if (cur_fline && cur_fline < (int)(max_fline - max_displayed_line)) {
 		bb_putchar(':');
 		return;
 	}
@@ -587,7 +587,7 @@ static void print_ascii(const char *str)
 /* Print the buffer */
 static void buffer_print(void)
 {
-	int i;
+	unsigned i;
 
 	move_cursor(0, 0);
 	for (i = 0; i <= max_displayed_line; i++)
@@ -600,7 +600,7 @@ static void buffer_print(void)
 
 static void buffer_fill_and_print(void)
 {
-	int i;
+	unsigned i;
 	for (i = 0; i <= max_displayed_line && cur_fline + i <= max_fline; i++) {
 		buffer[i] = flines[cur_fline + i];
 	}
@@ -662,7 +662,7 @@ static void open_file_and_read_lines(void)
 /* Reinitialize everything for a new file - free the memory and start over */
 static void reinitialize(void)
 {
-	int i;
+	unsigned i;
 
 	if (flines) {
 		for (i = 0; i <= max_fline; i++)
@@ -763,7 +763,7 @@ static int less_getch(int pos)
 static char* less_gets(int sz)
 {
 	char c;
-	int i = 0;
+	unsigned i = 0;
 	char *result = xzalloc(1);
 
 	while (1) {
@@ -836,7 +836,7 @@ static void change_file(int direction)
 
 static void remove_current_file(void)
 {
-	int i;
+	unsigned i;
 
 	if (num_files < 2)
 		return;
@@ -974,7 +974,7 @@ static void regex_process(void)
 	match_pos = 0;
 	fill_match_lines(0);
 	while (match_pos < num_matches) {
-		if (match_lines[match_pos] > cur_fline)
+		if ((int)match_lines[match_pos] > cur_fline)
 			break;
 		match_pos++;
 	}
@@ -990,7 +990,7 @@ static void regex_process(void)
 
 static void number_process(int first_digit)
 {
-	int i;
+	unsigned i;
 	int num;
 	char num_input[sizeof(int)*4]; /* more than enough */
 	char keypress;
@@ -1120,7 +1120,7 @@ static void save_input_to_file(void)
 {
 	const char *msg = "";
 	char *current_line;
-	int i;
+	unsigned i;
 	FILE *fp;
 
 	print_statusline("Log file: ");
@@ -1204,7 +1204,7 @@ static char opp_bracket(char bracket)
 
 static void match_right_bracket(char bracket)
 {
-	int i;
+	unsigned i;
 
 	if (strchr(flines[cur_fline], bracket) == NULL) {
 		print_statusline("No bracket in top line");

miscutils/makedevs.c

@@ -99,12 +99,12 @@ int makedevs_main(int argc, char **argv)
 
 	while ((line = xmalloc_fgetline(table)) != NULL) {
 		char type;
-		unsigned int mode = 0755;
+		unsigned mode = 0755;
-		unsigned int major = 0;
+		unsigned major = 0;
-		unsigned int minor = 0;
+		unsigned minor = 0;
-		unsigned int count = 0;
+		unsigned count = 0;
-		unsigned int increment = 0;
+		unsigned increment = 0;
-		unsigned int start = 0;
+		unsigned start = 0;
 		char name[41];
 		char user[41];
 		char group[41];
@@ -121,7 +121,7 @@ int makedevs_main(int argc, char **argv)
 		{
 			if (*line=='\0' || *line=='#' || isspace(*line))
 				continue;
-			bb_error_msg("line %d invalid: '%s'", linenum, line);
+			bb_error_msg("invalid line %d: '%s'", linenum, line);
 			ret = EXIT_FAILURE;
 			continue;
 		}
@@ -140,7 +140,7 @@ int makedevs_main(int argc, char **argv)
 				ret = EXIT_FAILURE;
 				goto loop;
 			}
-			if ((mode != -1) && (chmod(full_name, mode) < 0)){
+			if (chmod(full_name, mode) < 0) {
 				bb_perror_msg("line %d: chmod failed for %s", linenum, full_name);
 				ret = EXIT_FAILURE;
 				goto loop;
@@ -157,7 +157,7 @@ int makedevs_main(int argc, char **argv)
 				ret = EXIT_FAILURE;
 				goto loop;
 			}
-			if ((mode != -1) && (chmod(full_name, mode) < 0)){
+			if (chmod(full_name, mode) < 0) {
 				bb_perror_msg("line %d: chmod failed for %s", linenum, full_name);
 				ret = EXIT_FAILURE;
 				goto loop;
@@ -180,7 +180,7 @@ int makedevs_main(int argc, char **argv)
 			}
 
 			if (count > 0) {
-				int i;
+				unsigned i;
 				char *full_name_inc;
 
 				full_name_inc = xmalloc(strlen(full_name) + 4);
@@ -195,7 +195,7 @@ int makedevs_main(int argc, char **argv)
 						bb_perror_msg("line %d: chown failed for %s", linenum, full_name_inc);
 						ret = EXIT_FAILURE;
 					}
-					if ((mode != -1) && (chmod(full_name_inc, mode) < 0)){
+					if (chmod(full_name_inc, mode) < 0) {
 						bb_perror_msg("line %d: chmod failed for %s", linenum, full_name_inc);
 						ret = EXIT_FAILURE;
 					}
@@ -211,7 +211,7 @@ int makedevs_main(int argc, char **argv)
 					bb_perror_msg("line %d: chown failed for %s", linenum, full_name);
 					ret = EXIT_FAILURE;
 				}
-				if ((mode != -1) && (chmod(full_name, mode) < 0)){
+				if (chmod(full_name, mode) < 0) {
 					bb_perror_msg("line %d: chmod failed for %s", linenum, full_name);
 					ret = EXIT_FAILURE;
 				}

modutils/insmod.c

@@ -2041,7 +2041,7 @@ obj_add_symbol(struct obj_file *f, const char *name,
 	int n_type = ELF_ST_TYPE(info);
 	int n_binding = ELF_ST_BIND(info);
 
-	for (sym = f->symtab[hash]; sym; sym = sym->next)
+	for (sym = f->symtab[hash]; sym; sym = sym->next) {
 		if (f->symbol_cmp(sym->name, name) == 0) {
 			int o_secidx = sym->secidx;
 			int o_info = sym->info;
@@ -2100,14 +2100,14 @@ obj_add_symbol(struct obj_file *f, const char *name,
 				return sym;
 			}
 		}
+	}
 
 	/* Completely new symbol.  */
 	sym = arch_new_symbol();
 	sym->next = f->symtab[hash];
 	f->symtab[hash] = sym;
 	sym->ksymidx = -1;
-
+	if (ELF_ST_BIND(info) == STB_LOCAL && symidx != (unsigned long)(-1)) {
-	if (ELF_ST_BIND(info) == STB_LOCAL && symidx != -1) {
 		if (symidx >= f->local_symtab_size)
 			bb_error_msg("local symbol %s with index %ld exceeds local_symtab_size %ld",
 					name, (long) symidx, (long) f->local_symtab_size);
@@ -3313,7 +3313,7 @@ static struct obj_file *obj_load(FILE * fp, int loadprogbits ATTRIBUTE_UNUSED)
 {
 	struct obj_file *f;
 	ElfW(Shdr) * section_headers;
-	int shnum, i;
+	size_t shnum, i;
 	char *shstrtab;
 
 	/* Read the file header.  */
@@ -3585,7 +3585,7 @@ static int obj_gpl_license(struct obj_file *f, const char **license)
 		while (ptr < endptr) {
 			value = strchr(ptr, '=');
 			if (value && strncmp(ptr, "license", value-ptr) == 0) {
-				int i;
+				unsigned i;
 				if (license)
 					*license = value+1;
 				for (i = 0; i < ARRAY_SIZE(gpl_licenses); ++i) {
@@ -3724,7 +3724,8 @@ add_ksymoops_symbols(struct obj_file *f, const char *filename,
 	struct obj_symbol *sym;
 	char *name, *absolute_filename;
 	char str[STRVERSIONLEN];
-	int i, l, lm_name, lfilename, use_ksymtab, version;
+	unsigned i;
+	int l, lm_name, lfilename, use_ksymtab, version;
 	struct stat statbuf;
 
 	/* WARNING: was using realpath, but replaced by readlink to stop using
@@ -4127,7 +4128,7 @@ int insmod_main(int argc, char **argv)
 	m_size = obj_load_size(f);
 
 	m_addr = create_module(m_name, m_size);
-	if (m_addr == -1) switch (errno) {
+	if (m_addr == (ElfW(Addr))(-1)) switch (errno) {
 		case EEXIST:
 			bb_error_msg_and_die("a module named %s already exists", m_name);
 		case ENOMEM:

networking/arping.c

@@ -174,7 +174,7 @@ static bool recv_pack(unsigned char *buf, int len, struct sockaddr_ll *FROM)
 	if (ah->ar_pro != htons(ETH_P_IP)
 		|| (ah->ar_pln != 4)
 		|| (ah->ar_hln != me.sll_halen)
-		|| (len < sizeof(*ah) + 2 * (4 + ah->ar_hln)))
+		|| (len < (int)(sizeof(*ah) + 2 * (4 + ah->ar_hln))))
 		return false;
 
 	memcpy(&src_ip, p + ah->ar_hln, 4);

networking/httpd.c

@@ -600,7 +600,7 @@ static void parse_conf(const char *path, int flag)
 
 #if ENABLE_FEATURE_HTTPD_ERROR_PAGES
 		if (flag == FIRST_PARSE && *p0 == 'E') {
-			int i;
+			unsigned i;
 			/* error status code */
 			int status = atoi(++p0);
 			/* c already points at the character following ':' in parse loop */

networking/ifenslave.c

@@ -604,7 +604,7 @@ static int set_if_addr(char *master_ifname, char *slave_ifname)
 
 	struct ifreq ifr;
 	int res;
-	int i;
+	unsigned i;
 
 	for (i = 0; i < ARRAY_SIZE(ifra); i++) {
 		strncpy_IFNAMSIZ(ifr.ifr_name, master_ifname);

networking/ifupdown.c

@@ -486,7 +486,7 @@ static const struct dhcp_client_t ext_dhcp_clients[] = {
 #if ENABLE_FEATURE_IFUPDOWN_EXTERNAL_DHCP
 static int dhcp_up(struct interface_defn_t *ifd, execfn *exec)
 {
-	int i;
+	unsigned i;
 #if ENABLE_FEATURE_IFUPDOWN_IP
 	/* ip doesn't up iface when it configures it (unlike ifconfig) */
 	if (!execute("ip link set %iface% up", ifd, exec))
@@ -522,7 +522,7 @@ static int dhcp_up(struct interface_defn_t *ifd ATTRIBUTE_UNUSED,
 #if ENABLE_FEATURE_IFUPDOWN_EXTERNAL_DHCP
 static int dhcp_down(struct interface_defn_t *ifd, execfn *exec)
 {
-	int i;
+	unsigned i;
 	for (i = 0; i < ARRAY_SIZE(ext_dhcp_clients); i++) {
 		if (exists_execable(ext_dhcp_clients[i].name))
 			return execute(ext_dhcp_clients[i].stopcmd, ifd, exec);
@@ -1154,7 +1154,7 @@ int ifupdown_main(int argc, char **argv)
 		char *liface;
 		char *pch;
 		bool okay = 0;
-		unsigned cmds_ret;
+		int cmds_ret;
 
 		iface = xstrdup(target_list->data);
 		target_list = target_list->link;

networking/inetd.c

@@ -750,7 +750,7 @@ static NOINLINE servtab_t *parse_one_line(void)
 			if (*p == '-') {
 				p++;
 				n = bb_strtou(p, &p, 10);
-				if (n > INT_MAX || n < sep->se_rpcver_lo)
+				if (n > INT_MAX || (int)n < sep->se_rpcver_lo)
 					goto bad_ver_spec;
 				sep->se_rpcver_hi = n;
 			}
@@ -812,7 +812,7 @@ static NOINLINE servtab_t *parse_one_line(void)
 	 && (sep->se_socktype == SOCK_STREAM
 	     || sep->se_socktype == SOCK_DGRAM)
 	) {
-		int i;
+		unsigned i;
 		for (i = 0; i < ARRAY_SIZE(builtins); i++)
 			if (strncmp(builtins[i].bi_service7, sep->se_service, 7) == 0)
 				goto found_bi;

networking/interface.c

@@ -525,7 +525,7 @@ static int if_readconf(void)
 		if (ioctl_or_warn(skfd, SIOCGIFCONF, &ifc) < 0) {
 			goto out;
 		}
-		if (ifc.ifc_len == sizeof(struct ifreq) * numreqs) {
+		if (ifc.ifc_len == (int)(sizeof(struct ifreq) * numreqs)) {
 			/* assume it overflowed and try again */
 			numreqs += 10;
 			continue;
@@ -862,7 +862,7 @@ const struct hwtype *get_hwntype(int type)
 /* return 1 if address is all zeros */
 static int hw_null_address(const struct hwtype *hw, void *ap)
 {
-	unsigned int i;
+	int i;
 	unsigned char *address = (unsigned char *) ap;
 
 	for (i = 0; i < hw->alen; i++)

networking/isrv_identd.c

@@ -61,7 +61,7 @@ static int do_rd(int fd, void **paramp)
 	p = strpbrk(cur, "\r\n");
 	if (p)
 		*p = '\0';
-	if (!p && sz && buf->pos <= sizeof(buf->buf))
+	if (!p && sz && buf->pos <= (int)sizeof(buf->buf))
 		goto ok;
 	/* Terminate session. If we are in server mode, then
 	 * fd is still in nonblocking mode - we never block here */

networking/libiproute/libnetlink.c

@@ -265,7 +265,7 @@ int rtnl_talk(struct rtnl_handle *rtnl, struct nlmsghdr *n,
 		if (msg.msg_namelen != sizeof(nladdr)) {
 			bb_error_msg_and_die("sender address length == %d", msg.msg_namelen);
 		}
-		for (h = (struct nlmsghdr*)buf; status >= sizeof(*h); ) {
+		for (h = (struct nlmsghdr*)buf; status >= (int)sizeof(*h); ) {
 //			int l_err;
 			int len = h->nlmsg_len;
 			int l = len - sizeof(*h);
@@ -293,7 +293,7 @@ int rtnl_talk(struct rtnl_handle *rtnl, struct nlmsghdr *n,
 
 			if (h->nlmsg_type == NLMSG_ERROR) {
 				struct nlmsgerr *err = (struct nlmsgerr*)NLMSG_DATA(h);
-				if (l < sizeof(struct nlmsgerr)) {
+				if (l < (int)sizeof(struct nlmsgerr)) {
 					bb_error_msg("ERROR truncated");
 				} else {
 					errno = - err->error;
@@ -336,7 +336,7 @@ int addattr32(struct nlmsghdr *n, int maxlen, int type, uint32_t data)
 {
 	int len = RTA_LENGTH(4);
 	struct rtattr *rta;
-	if (NLMSG_ALIGN(n->nlmsg_len) + len > maxlen)
+	if ((int)(NLMSG_ALIGN(n->nlmsg_len) + len) > maxlen)
 		return -1;
 	rta = (struct rtattr*)(((char*)n) + NLMSG_ALIGN(n->nlmsg_len));
 	rta->rta_type = type;
@@ -351,7 +351,7 @@ int addattr_l(struct nlmsghdr *n, int maxlen, int type, void *data, int alen)
 	int len = RTA_LENGTH(alen);
 	struct rtattr *rta;
 
-	if (NLMSG_ALIGN(n->nlmsg_len) + len > maxlen)
+	if ((int)(NLMSG_ALIGN(n->nlmsg_len) + len) > maxlen)
 		return -1;
 	rta = (struct rtattr*)(((char*)n) + NLMSG_ALIGN(n->nlmsg_len));
 	rta->rta_type = type;

networking/libiproute/ll_map.c

@@ -75,7 +75,7 @@ int ll_remember_index(struct sockaddr_nl *who ATTRIBUTE_UNUSED,
 	if (tb[IFLA_ADDRESS]) {
 		int alen;
 		im->alen = alen = RTA_PAYLOAD(tb[IFLA_ADDRESS]);
-		if (alen > sizeof(im->addr))
+		if (alen > (int)sizeof(im->addr))
 			alen = sizeof(im->addr);
 		memcpy(im->addr, RTA_DATA(tb[IFLA_ADDRESS]), alen);
 	} else {

networking/libiproute/ll_proto.c

@@ -98,10 +98,8 @@ __PF(ECONET,econet)
 
 const char *ll_proto_n2a(unsigned short id, char *buf, int len)
 {
-	int i;
+	unsigned i;
-
 	id = ntohs(id);
-
 	for (i = 0; i < ARRAY_SIZE(llproto_names); i++) {
 		 if (llproto_names[i].id == id)
 			return llproto_names[i].name;
@@ -112,7 +110,7 @@ const char *ll_proto_n2a(unsigned short id, char *buf, int len)
 
 int ll_proto_a2n(unsigned short *id, char *buf)
 {
-	int i;
+	unsigned i;
 	for (i = 0; i < ARRAY_SIZE(llproto_names); i++) {
 		 if (strcasecmp(llproto_names[i].name, buf) == 0) {
 			 *id = htons(llproto_names[i].id);

networking/libiproute/ll_types.c

@@ -187,7 +187,7 @@ const char *ll_type_n2a(int type, char *buf, int len)
 #endif /* FEATURE_IP_RARE_PROTOCOLS */
 	};
 
-	int i;
+	unsigned i;
 	const char *aname = arphrd_name;
 	for (i = 0; i < ARRAY_SIZE(arphrd_type); i++) {
 		if (arphrd_type[i] == type)

networking/sendmail.c

@@ -187,7 +187,7 @@ static int smtp_checkp(const char *fmt, const char *param, int code)
 	bb_error_msg_and_die("%s failed", msg);
 }
 
-static int inline smtp_check(const char *fmt, int code)
+static inline int smtp_check(const char *fmt, int code)
 {
 	return smtp_checkp(fmt, NULL, code);
 }
@@ -224,7 +224,7 @@ static void pop3_checkr(const char *fmt, const char *param, char **ret)
 	bb_error_msg_and_die("%s failed", msg);
 }
 
-static void inline pop3_check(const char *fmt, const char *param)
+static inline void pop3_check(const char *fmt, const char *param)
 {
 	pop3_checkr(fmt, param, NULL);
 }

networking/traceroute.c

@@ -413,7 +413,7 @@ ifaddrlist(struct IFADDRLIST **ipaddrp)
 	ifc.ifc_buf = (caddr_t)ibuf;
 
 	if (ioctl(fd, SIOCGIFCONF, (char *)&ifc) < 0
-	 || ifc.ifc_len < sizeof(struct ifreq)
+	 || ifc.ifc_len < (int)sizeof(struct ifreq)
 	) {
 		if (errno == EINVAL)
 			bb_error_msg_and_die(

networking/udhcp/files.c

@@ -319,7 +319,7 @@ void read_config(const char *file)
 {
 	FILE *in;
 	char buffer[READ_CONFIG_BUF_SIZE], *token, *line;
-	int i, lineno;
+	unsigned i, lineno;
 
 	for (i = 0; i < KWS_WITH_DEFAULTS; i++)
 		keywords[i].handler(keywords[i].def, keywords[i].var);
@@ -344,7 +344,7 @@ void read_config(const char *file)
 		for (i = 0; i < ARRAY_SIZE(keywords); i++) {
 			if (!strcasecmp(token, keywords[i].keyword)) {
 				if (!keywords[i].handler(line, keywords[i].var)) {
-					bb_error_msg("can't parse line %d in %s at '%s'",
+					bb_error_msg("can't parse line %u in %s at '%s'",
 							lineno, file, line);
 					/* reset back to the default value */
 					keywords[i].handler(keywords[i].def, keywords[i].var);

networking/zcip.c

@@ -162,7 +162,7 @@ static int run(char *argv[3], struct in_addr *ip)
 /**
  * Return milliseconds of random delay, up to "secs" seconds.
  */
-static unsigned ALWAYS_INLINE random_delay_ms(unsigned secs)
+static ALWAYS_INLINE unsigned random_delay_ms(unsigned secs)
 {
 	return rand() % (secs * 1000);
 }

procps/kill.c

@@ -106,19 +106,19 @@ int kill_main(int argc, char **argv)
 	argc--;
 
 do_it_now:
+	pid = getpid();
 
 	if (killall5) {
 		pid_t sid;
 		procps_status_t* p = NULL;
 
+		/* Find out our own session id */
+		sid = getsid(pid);
 		/* Now stop all processes */
 		kill(-1, SIGSTOP);
-		/* Find out our own session id */
-		pid = getpid();
-		sid = getsid(pid);
 		/* Now kill all processes except our session */
 		while ((p = procps_scan(p, PSSCAN_PID|PSSCAN_SID))) {
-			if (p->sid != sid && p->pid != pid && p->pid != 1)
+			if (p->sid != (unsigned)sid && p->pid != (unsigned)pid && p->pid != 1)
 				kill(p->pid, signo);
 		}
 		/* And let them continue */
@@ -134,7 +134,6 @@ do_it_now:
 
 	if (killall) {
 		/* Looks like they want to do a killall.  Do that */
-		pid = getpid();
 		while (arg) {
 			pid_t* pidList;
 

procps/pgrep.c

@@ -115,7 +115,7 @@ int pgrep_main(int argc ATTRIBUTE_UNUSED, char **argv)
 			cmd = proc->comm;
 		/* NB: OPT_INVERT is always 0 or 1 */
 		if ((regexec(&re_buffer, cmd, 1, re_match, 0) == 0 /* match found */
-		     && (!OPT_ANCHOR || (re_match[0].rm_so == 0 && re_match[0].rm_eo == strlen(cmd)))) ^ OPT_INVERT
+		     && (!OPT_ANCHOR || (re_match[0].rm_so == 0 && re_match[0].rm_eo == (regoff_t)strlen(cmd)))) ^ OPT_INVERT
 		) {
 			matched_pid = proc->pid;
 			if (OPT_LAST) {

procps/pidof.c

@@ -59,7 +59,7 @@ int pidof_main(int argc ATTRIBUTE_UNUSED, char **argv)
 			if (opt & OPT_OMIT) {
 				llist_t *omits_p = omits;
 				while (omits_p) {
-					if (xatoul(omits_p->data) == *pl) {
+					if (xatoul(omits_p->data) == (unsigned long)(*pl)) {
 						goto omitting;
 					}
 					omits_p = omits_p->link;

procps/ps.c

@@ -310,7 +310,7 @@ static ps_out_t* new_out_t(void)
 
 static const ps_out_t* find_out_spec(const char *name)
 {
-	int i;
+	unsigned i;
 	for (i = 0; i < ARRAY_SIZE(out_spec); i++) {
 		if (!strcmp(name, out_spec[i].name))
 			return &out_spec[i];

procps/top.c

@@ -53,7 +53,7 @@ typedef struct jiffy_counts_t {
    the next. Used for finding deltas. */
 typedef struct save_hist {
 	unsigned long ticks;
-	unsigned pid;
+	pid_t pid;
 } save_hist;
 
 typedef int (*cmp_funcp)(top_status_t *P, top_status_t *Q);
@@ -317,7 +317,7 @@ static unsigned long display_header(int scr_width)
 	fclose(fp);
 
 	/* output memory info */
-	if (scr_width > sizeof(scrbuf))
+	if (scr_width > (int)sizeof(scrbuf))
 		scr_width = sizeof(scrbuf);
 	snprintf(scrbuf, scr_width,
 		"Mem: %luK used, %luK free, %luK shrd, %luK buff, %luK cached",
@@ -481,7 +481,7 @@ static NOINLINE void display_process_list(int count, int scr_width)
 				, SHOW_STAT(pcpu)
 #endif
 		);
-		if (col + 1 < scr_width)
+		if ((int)(col + 1) < scr_width)
 			read_cmdline(line_buf + col, scr_width - col - 1, s->pid, s->comm);
 		fputs(line_buf, stdout);
 		/* printf(" %d/%d %lld/%lld", s->pcpu, total_pcpu,
@@ -584,7 +584,7 @@ static char *grab_number(char *str, const char *match, unsigned sz)
 static void display_topmem_header(int scr_width)
 {
 	char linebuf[128];
-	int i;
+	unsigned i;
 	FILE *fp;
 	union {
 		struct {
@@ -703,7 +703,7 @@ static NOINLINE void display_topmem_process_list(int count, int scr_width)
 		ulltoa6_and_space(s->dirty_sh, &line_buf[6*6]);
 		ulltoa6_and_space(s->stack   , &line_buf[7*6]);
 		line_buf[8*6] = '\0';
-		if (scr_width > MIN_WIDTH) {
+		if (scr_width > (int)MIN_WIDTH) {
 			read_cmdline(&line_buf[8*6], scr_width - MIN_WIDTH, s->pid, s->comm);
 		}
 		printf("\n""%.*s", scr_width, line_buf);

shell/ash.c

@@ -1790,7 +1790,7 @@ extern struct globals_var *const ash_ptr_to_globals_var;
 #define vartab        (G_var.vartab       )
 #define varinit       (G_var.varinit      )
 #define INIT_G_var() do { \
-	int i; \
+	unsigned i; \
 	(*(struct globals_var**)&ash_ptr_to_globals_var) = xzalloc(sizeof(G_var)); \
 	barrier(); \
 	for (i = 0; i < ARRAY_SIZE(varinit_data); i++) { \
@@ -6223,7 +6223,7 @@ varvalue(char *name, int varflags, int flags, struct strlist *var_str_list)
 				if (!eq) /* stop at first non-assignment */
 					break;
 				eq++;
-				if (name_len == (eq - str)
+				if (name_len == (unsigned)(eq - str)
 				 && strncmp(str, name, name_len) == 0) {
 					p = eq;
 					/* goto value; - WRONG! */
@@ -9500,12 +9500,13 @@ plus_minus_o(char *name, int val)
 		ash_msg("illegal option %co %s", val ? '-' : '+', name);
 		return 1;
 	}
-	for (i = 0; i < NOPTS; i++)
+	for (i = 0; i < NOPTS; i++) {
 		if (val) {
 			out1fmt("%-16s%s\n", optnames(i), optlist[i] ? "on" : "off");
 		} else {
 			out1fmt("set %co %s\n", optlist[i] ? '-' : '+', optnames(i));
 		}
+	}
 	return 0;
 }
 static void
@@ -9699,7 +9700,7 @@ getopts(char *optstr, char *optvar, char **optfirst, int *param_optind, int *opt
 		return 1;
 	optnext = optfirst + *param_optind - 1;
 
-	if (*param_optind <= 1 || *optoff < 0 || strlen(optnext[-1]) < *optoff)
+	if (*param_optind <= 1 || *optoff < 0 || (int)strlen(optnext[-1]) < *optoff)
 		p = NULL;
 	else
 		p = optnext[-1] + *optoff;
@@ -11121,7 +11122,7 @@ xxreadtoken(void)
 						return readtoken1(c, BASESYNTAX, (char *) NULL, 0);
 					}
 
-					if (p - xxreadtoken_chars >= xxreadtoken_singles) {
+					if ((size_t)(p - xxreadtoken_chars) >= xxreadtoken_singles) {
 						if (pgetc() == *p) {    /* double occurrence? */
 							p += xxreadtoken_doubles + 1;
 						} else {
@@ -11817,7 +11818,8 @@ trapcmd(int argc ATTRIBUTE_UNUSED, char **argv ATTRIBUTE_UNUSED)
 static int
 helpcmd(int argc ATTRIBUTE_UNUSED, char **argv ATTRIBUTE_UNUSED)
 {
-	int col, i;
+	unsigned col;
+	unsigned i;
 
 	out1fmt("\nBuilt-in commands:\n-------------------\n");
 	for (col = 0, i = 0; i < ARRAY_SIZE(builtintab); i++) {
@@ -12479,6 +12481,7 @@ ulimitcmd(int argc ATTRIBUTE_UNUSED, char **argv ATTRIBUTE_UNUSED)
 
 			while ((c = *p++) >= '0' && c <= '9') {
 				val = (val * 10) + (long)(c - '0');
+				// val is actually 'unsigned long int' and can't get < 0
 				if (val < (rlim_t) 0)
 					break;
 			}

sysklogd/logread.c

@@ -70,7 +70,7 @@ static void interrupted(int sig ATTRIBUTE_UNUSED)
 int logread_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
 int logread_main(int argc ATTRIBUTE_UNUSED, char **argv)
 {
-	int cur;
+	unsigned cur;
 	int log_semid; /* ipc semaphore id */
 	int log_shmid; /* ipc shared memory id */
 	smallint follow = getopt32(argv, "f");

sysklogd/syslogd.c

@@ -570,7 +570,7 @@ static void do_syslogd(void)
 	timestamp_and_log_internal("syslogd started: BusyBox v" BB_VER);
 
 	for (;;) {
-		size_t sz;
+		ssize_t sz;
 
 #if ENABLE_FEATURE_SYSLOGD_DUP
 		last_buf = recvbuf;

util-linux/fdisk_sun.c

@@ -230,8 +230,7 @@ static void
 create_sunlabel(void)
 {
 	struct hd_geometry geometry;
-	unsigned int ndiv;
+	unsigned ndiv;
-	int i;
 	unsigned char c;
 	const struct sun_predefined_drives *p = NULL;
 
@@ -241,6 +240,7 @@ create_sunlabel(void)
 	memset(MBRbuffer, 0, sizeof(MBRbuffer));
 	sunlabel->magic = SUN_SSWAP16(SUN_LABEL_MAGIC);
 	if (!floppy) {
+		unsigned i;
 		puts("Drive type\n"
 		 "   ?   auto configure\n"
 		 "   0   custom (with hardware detected defaults)");

util-linux/getopt.c

@@ -147,7 +147,7 @@ static const char *normalize(const char *arg)
 static int generate_output(char **argv, int argc, const char *optstr, const struct option *longopts)
 {
 	int exit_code = 0; /* We assume everything will be OK */
-	unsigned opt;
+	int opt;
 #if ENABLE_GETOPT_LONG
 	int longindex;
 #endif
@@ -173,7 +173,7 @@ static int generate_output(char **argv, int argc, const char *optstr, const stru
 #else
 			getopt(argc, argv, optstr);
 #endif
-		if (opt == EOF)
+		if (opt == -1)
 			break;
 		if (opt == '?' || opt == ':' )
 			exit_code = 1;
@@ -190,7 +190,7 @@ static int generate_output(char **argv, int argc, const char *optstr, const stru
 				printf(" %s", normalize(optarg));
 			else {
 				printf(" -%c", opt);
-				charptr = strchr(optstr,opt);
+				charptr = strchr(optstr, opt);
 				if (charptr != NULL && *++charptr == ':')
 					printf(" %s",
 						normalize(optarg ? optarg : ""));

util-linux/mount.c

@@ -307,7 +307,7 @@ static long parse_mount_options(char *options, char **unrecognized)
 
 	// Loop through options
 	for (;;) {
-		size_t i;
+		unsigned i;
 		char *comma = strchr(options, ',');
 		const char *option_str = mount_option_str;
 

util-linux/volume_id/unused_ufs.c

@@ -167,7 +167,7 @@ int volume_id_probe_ufs(struct volume_id *id, uint64_t off)
 	static const short offsets[] = { 0, 8, 64, 256 };
 
 	uint32_t magic;
-	int i;
+	unsigned i;
 	struct ufs_super_block *ufs;
 
 	dbg("probing at offset 0x%llx", (unsigned long long) off);

util-linux/volume_id/volume_id.c

@@ -152,7 +152,7 @@ static const probe_fptr fs2[] = {
 
 int volume_id_probe_all(struct volume_id *id, uint64_t off, uint64_t size)
 {
-	size_t i;
+	unsigned i;
 
 	if (id == NULL)
 		return -EINVAL;