uname,individual: fix improper printf usage

uname,awk: small code shrink

function                                             old     new   delta
uname_main                                           175     166      -9
nvalloc                                              167     157     -10
evaluate                                            6381    6370     -11
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 0/3 up/down: 0/-30)             Total: -30 bytes

3 files changed, 24 insertions, 29 deletions

diff --git a/applets/individual.c b/applets/individual.c
index 414a11b..341f4d1 100644
--- a/applets/individual.c
+++ b/applets/individual.c
@@ -14,13 +14,11 @@ const char *applet_name;
 int main(int argc, char **argv)
 {
 	applet_name = argv[0];
-
 	return APPLET_main(argc,argv);
 }
 
 void bb_show_usage(void)
 {
-	printf(APPLET_full_usage "\n");
-
+	fputs(APPLET_full_usage "\n", stdout);
 	exit(EXIT_FAILURE);
 }
diff --git a/coreutils/uname.c b/coreutils/uname.c
index 34600e7..76fd3ca 100644
--- a/coreutils/uname.c
+++ b/coreutils/uname.c
@@ -17,7 +17,7 @@
    -m, --machine	sun
    -a, --all		SunOS rocky8 4.0  sun
 
-   The default behavior is equivalent to `-s'.
+   The default behavior is equivalent to '-s'.
 
    David MacKenzie <djm@gnu.ai.mit.edu> */
 
@@ -39,47 +39,43 @@ typedef struct {
 } uname_info_t;
 
 static const char options[] ALIGN1 = "snrvmpa";
-static const unsigned short utsname_offset[] ALIGN2 = {
-	offsetof(uname_info_t,name.sysname),
-	offsetof(uname_info_t,name.nodename),
-	offsetof(uname_info_t,name.release),
-	offsetof(uname_info_t,name.version),
-	offsetof(uname_info_t,name.machine),
-	offsetof(uname_info_t,processor)
+static const unsigned short utsname_offset[] = {
+	offsetof(uname_info_t, name.sysname),
+	offsetof(uname_info_t, name.nodename),
+	offsetof(uname_info_t, name.release),
+	offsetof(uname_info_t, name.version),
+	offsetof(uname_info_t, name.machine),
+	offsetof(uname_info_t, processor)
 };
 
 int uname_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
-int uname_main(int argc, char **argv)
+int uname_main(int argc ATTRIBUTE_UNUSED, char **argv)
 {
 	uname_info_t uname_info;
 #if defined(__sparc__) && defined(__linux__)
 	char *fake_sparc = getenv("FAKE_SPARC");
 #endif
-	const unsigned short int *delta;
+	const unsigned short *delta;
 	char toprint;
 
 	toprint = getopt32(argv, options);
 
-	if (argc != optind) {
+	if (argv[optind]) { /* coreutils-6.9 compat */
 		bb_show_usage();
 	}
 
-	if (toprint & (1 << 6)) {
+	if (toprint & (1 << 6)) { /* -a => all opts on */
 		toprint = 0x3f;
 	}
 
-	if (toprint == 0) {
-		toprint = 1;			/* sysname */
+	if (toprint == 0) { /* no opts => -s (sysname) */
+		toprint = 1;
 	}
 
-	if (uname(&uname_info.name) == -1) {
-		bb_error_msg_and_die("cannot get system name");
-	}
+	uname(&uname_info.name); /* never fails */
 
 #if defined(__sparc__) && defined(__linux__)
-	if ((fake_sparc != NULL)
-		&& ((fake_sparc[0] == 'y')
-			|| (fake_sparc[0] == 'Y'))) {
+	if (fake_sparc && (fake_sparc[0] | 0x20) == 'y') {
 		strcpy(uname_info.name.machine, "sparc");
 	}
 #endif
@@ -89,7 +85,8 @@ int uname_main(int argc, char **argv)
 	delta = utsname_offset;
 	do {
 		if (toprint & 1) {
-			printf("%s", ((char *)(&uname_info)) + *delta);
+			/* printf would not be safe here */
+			fputs((char *)(&uname_info) + *delta, stdout);
 			if (toprint > 1) {
 				bb_putchar(' ');
 			}
@@ -98,5 +95,5 @@ int uname_main(int argc, char **argv)
 	} while (toprint >>= 1);
 	bb_putchar('\n');
 
-	fflush_stdout_and_exit(EXIT_SUCCESS);
+	fflush_stdout_and_exit(EXIT_SUCCESS); /* coreutils-6.9 compat */
 }
diff --git a/editors/awk.c b/editors/awk.c
index cc5dc84..44b747b 100644
--- a/editors/awk.c
+++ b/editors/awk.c
@@ -852,11 +852,11 @@ static var *nvalloc(int n)
 
 	if (!g_cb) {
 		size = (n <= MINNVBLOCK) ? MINNVBLOCK : n;
-		g_cb = xmalloc(sizeof(nvblock) + size * sizeof(var));
+		g_cb = xzalloc(sizeof(nvblock) + size * sizeof(var));
 		g_cb->size = size;
 		g_cb->pos = g_cb->nv;
 		g_cb->prev = pb;
-		g_cb->next = NULL;
+		/*g_cb->next = NULL; - xzalloc did it */
 		if (pb) pb->next = g_cb;
 	}
 
@@ -2028,9 +2028,9 @@ static var *exec_builtin(node *op, var *res)
 		if (i < 0) i = 0;
 		n = (nargs > 2) ? getvar_i(av[2]) : l-i;
 		if (n < 0) n = 0;
-		s = xmalloc(n+1);
+		s = xzalloc(n + 1);
 		strncpy(s, as[0]+i, n);
-		s[n] = '\0';
+		/*s[n] = '\0'; - xzalloc did it */
 		setvar_p(res, s);
 		break;