Forbid b{copy,zero,cmp}(). Don't include <strings.h> for <string.h>

Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Ahelenia Ziemiańska <nabijaczleweli@nabijaczleweli.xyz>
Closes #12996

tests/zfs-tests/cmd/file_common.h

@@ -52,7 +52,7 @@ extern "C" {
 #include <stdio.h>
 #include <unistd.h>
 #include <stdlib.h>
-#include <strings.h>
+#include <string.h>
 
 #define	BLOCKSZ		8192
 #define	DATA		0xa5

tests/zfs-tests/cmd/libzfs_input_check/libzfs_input_check.c

@@ -20,7 +20,6 @@
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
-#include <strings.h>
 #include <libzfs_core.h>
 #include <libzutil.h>
 
@@ -33,19 +32,19 @@
  * Test the nvpair inputs for the non-legacy zfs ioctl commands.
  */
 
-boolean_t unexpected_failures;
-int zfs_fd;
-const char *active_test;
+static boolean_t unexpected_failures;
+static int zfs_fd;
+static const char *active_test;
 
 /*
  * Tracks which zfs_ioc_t commands were tested
  */
-boolean_t ioc_tested[ZFS_IOC_LAST - ZFS_IOC_FIRST];
+static boolean_t ioc_tested[ZFS_IOC_LAST - ZFS_IOC_FIRST];
 
 /*
  * Legacy ioctls that are skipped (for now)
  */
-static unsigned ioc_skip[] = {
+static const zfs_ioc_t ioc_skip[] = {
 	ZFS_IOC_POOL_CREATE,
 	ZFS_IOC_POOL_DESTROY,
 	ZFS_IOC_POOL_IMPORT,

tests/zfs-tests/cmd/mkbusy/mkbusy.c

@@ -24,7 +24,7 @@
 #include <sys/stat.h>
 #include <fcntl.h>
 #include <dirent.h>
-#include <strings.h>
+#include <string.h>
 #include <stdlib.h>
 #include <unistd.h>
 #include <errno.h>

tests/zfs-tests/cmd/nvlist_to_lua/nvlist_to_lua.c

@@ -20,13 +20,12 @@
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
-#include <strings.h>
 #include <libzfs_core.h>
 #include <sys/nvpair.h>
 
-nvlist_t *nvl;
-const char *pool;
-boolean_t unexpected_failures;
+static nvlist_t *nvl;
+static const char *pool;
+static boolean_t unexpected_failures;
 
 static boolean_t
 nvlist_equal(nvlist_t *nvla, nvlist_t *nvlb)

tests/zfs-tests/cmd/rename_dir/rename_dir.c

@@ -46,7 +46,6 @@
 #include <stdlib.h>
 #include <unistd.h>
 #include <stdio.h>
-#include <strings.h>
 
 int
 main(void)
@@ -58,6 +57,7 @@ main(void)
 		perror("fork");
 		exit(1);
 		break;
+
 	case 0:
 		while (i > 0) {
 			int c_count = 0;
@@ -65,11 +65,11 @@ main(void)
 				c_count++;
 			if (rename("1/2/3/c", "a/b/c") == 0)
 				c_count++;
-			if (c_count) {
+			if (c_count)
 				(void) fprintf(stderr, "c_count: %d", c_count);
-			}
 		}
-		break;
+		_exit(0);
+
 	default:
 		while (i > 0) {
 			int p_count = 0;
@@ -77,12 +77,9 @@ main(void)
 				p_count++;
 			if (rename("a/b/c/d/e/1", "1") == 0)
 				p_count++;
-			if (p_count) {
+			if (p_count)
 				(void) fprintf(stderr, "p_count: %d", p_count);
-			}
 		}
-		break;
+		return (0);
 	}
-
-	return (0);
 }

tests/zfs-tests/cmd/rm_lnkcnt_zero_file/rm_lnkcnt_zero_file.c

@@ -45,7 +45,6 @@
 #include <sys/stat.h>
 #include <stdlib.h>
 #include <unistd.h>
-#include <strings.h>
 
 static char *filebase;
 

tests/zfs-tests/tests/functional/checksum/skein_test.c

@@ -34,7 +34,7 @@
 
 #include <sys/skein.h>
 #include <stdlib.h>
-#include <strings.h>
+#include <string.h>
 #include <stdio.h>
 #include <sys/time.h>
 #include <sys/stdtypes.h>

tests/zfs-tests/tests/functional/ctime/ctime.c

@@ -38,7 +38,6 @@
 #include <stdio.h>
 #include <stdlib.h>
 #include <unistd.h>
-#include <strings.h>
 #include <errno.h>
 #include <fcntl.h>
 #include <libgen.h>

tests/zfs-tests/tests/functional/hkdf/hkdf_test.c

@@ -18,13 +18,11 @@
  */
 
 #include <stdio.h>
-#include <strings.h>
+#include <string.h>
 #include <sys/crypto/icp.h>
 #include <sys/sha2.h>
 #include <sys/hkdf.h>
 
-#define	NELEMS(x)  (sizeof (x) / sizeof ((x)[0]))
-
 /*
  * Byte arrays are given as char pointers so that they
  * can be specified as strings.
@@ -214,7 +212,7 @@ main(void)
 
 	icp_init();
 
-	for (i = 0; i < NELEMS(test_vectors); i++) {
+	for (i = 0; i < ARRAY_SIZE(test_vectors); i++) {
 		ret = run_test(i, &test_vectors[i]);
 		if (ret != 0)
 			break;