diff --git a/coreutils/cat.c b/coreutils/cat.c
index 10eb29c..a959805 100644
--- a/coreutils/cat.c
+++ b/coreutils/cat.c
@@ -26,10 +26,10 @@
 	}
 
 	do {
-		f = bb_wfopen_input(*argv);
+		f = fopen_or_warn_stdin(*argv);
 		if (f) {
 			off_t r = bb_copyfd_eof(fileno(f), STDOUT_FILENO);
-			bb_fclose_nonstdin(f);
+			fclose_if_not_stdin(f);
 			if (r >= 0) {
 				continue;
 			}
diff --git a/coreutils/cksum.c b/coreutils/cksum.c
index 3a9b0b0..5221332 100644
--- a/coreutils/cksum.c
+++ b/coreutils/cksum.c
@@ -22,7 +22,7 @@
 	int inp_stdin = (argc == optind) ? 1 : 0;
 
 	do {
-		fp = bb_wfopen_input((inp_stdin) ? bb_msg_standard_input : *++argv);
+		fp = fopen_or_warn_stdin((inp_stdin) ? bb_msg_standard_input : *++argv);
 
 		crc = 0;
 		length = 0;
diff --git a/coreutils/cmp.c b/coreutils/cmp.c
index 2b923c8..71007ea 100644
--- a/coreutils/cmp.c
+++ b/coreutils/cmp.c
@@ -27,10 +27,9 @@
 {
 	FILE *fp;
 
-	if ((fp = bb_wfopen_input(filename)) != NULL) {
+	fp = fopen_or_warn_stdin(filename);
+	if (fp)
 		return fp;
-	}
-
 	exit(xfunc_error_retval);	/* We already output an error message. */
 }
 
diff --git a/coreutils/cut.c b/coreutils/cut.c
index 5dc3543..a538e3d 100644
--- a/coreutils/cut.c
+++ b/coreutils/cut.c
@@ -272,7 +272,7 @@
 		FILE *file;
 
 		for (; optind < argc; optind++) {
-			file = bb_wfopen(argv[optind], "r");
+			file = fopen_or_warn(argv[optind], "r");
 			if (file) {
 				cut_file(file);
 				fclose(file);
diff --git a/coreutils/fold.c b/coreutils/fold.c
index e33be55..9ca693d 100644
--- a/coreutils/fold.c
+++ b/coreutils/fold.c
@@ -70,7 +70,7 @@
 	}
 
 	do {
-		FILE *istream = bb_wfopen_input(*argv);
+		FILE *istream = fopen_or_warn_stdin(*argv);
 		int c;
 		int column = 0;		/* Screen column where next char will go. */
 		int offset_out = 0;	/* Index in `line_out' for next char. */
@@ -144,7 +144,7 @@
 			fwrite(line_out, sizeof(char), (size_t) offset_out, stdout);
 		}
 
-		if (ferror(istream) || bb_fclose_nonstdin(istream)) {
+		if (ferror(istream) || fclose_if_not_stdin(istream)) {
 			bb_perror_msg("%s", *argv);	/* Avoid multibyte problems. */
 			errs |= EXIT_FAILURE;
 		}
diff --git a/coreutils/head.c b/coreutils/head.c
index 2e9000d..d732461 100644
--- a/coreutils/head.c
+++ b/coreutils/head.c
@@ -112,7 +112,7 @@
 #endif
 
 	do {
-		fp = bb_wfopen_input(*argv);
+		fp = fopen_or_warn_stdin(*argv);
 		if (fp) {
 			if (fp == stdin) {
 				*argv = (char *) bb_msg_standard_input;
@@ -127,7 +127,7 @@
 				}
 				putchar(c);
 			}
-			if (bb_fclose_nonstdin(fp)) {
+			if (fclose_if_not_stdin(fp)) {
 				bb_perror_msg("%s", *argv);	/* Avoid multibyte problems. */
 				retval = EXIT_FAILURE;
 			}
diff --git a/coreutils/md5_sha1_sum.c b/coreutils/md5_sha1_sum.c
index ca23d8a..93d8946 100644
--- a/coreutils/md5_sha1_sum.c
+++ b/coreutils/md5_sha1_sum.c
@@ -162,7 +162,7 @@
 			bb_error_msg("WARNING: %d of %d computed checksums did NOT match",
 						 count_failed, count_total);
 		}
-		if (bb_fclose_nonstdin(pre_computed_stream) == EOF) {
+		if (fclose_if_not_stdin(pre_computed_stream) == EOF) {
 			bb_perror_msg_and_die("cannot close file %s", file_ptr);
 		}
 	} else {
diff --git a/coreutils/sum.c b/coreutils/sum.c
index d663e34..93f4e22 100644
--- a/coreutils/sum.c
+++ b/coreutils/sum.c
@@ -38,7 +38,7 @@
 		fp = stdin;
 		have_read_stdin++;
 	} else {
-		fp = bb_wfopen(file, "r");
+		fp = fopen_or_warn(file, "r");
 		if (fp == NULL)
 			goto out;
 	}
@@ -52,11 +52,11 @@
 
 	if (ferror(fp)) {
 		bb_perror_msg(file);
-		bb_fclose_nonstdin(fp);
+		fclose_if_not_stdin(fp);
 		goto out;
 	}
 
-	if (bb_fclose_nonstdin(fp) == EOF) {
+	if (fclose_if_not_stdin(fp) == EOF) {
 		bb_perror_msg(file);
 		goto out;
 	}
diff --git a/coreutils/tee.c b/coreutils/tee.c
index f0e1fad..06c94ab 100644
--- a/coreutils/tee.c
+++ b/coreutils/tee.c
@@ -49,7 +49,7 @@
 	goto GOT_NEW_FILE;
 
 	do {
-		if ((*p = bb_wfopen(*argv, mode)) == NULL) {
+		if ((*p = fopen_or_warn(*argv, mode)) == NULL) {
 			retval = EXIT_FAILURE;
 			continue;
 		}
diff --git a/coreutils/uudecode.c b/coreutils/uudecode.c
index c8152a8..a08d985 100644
--- a/coreutils/uudecode.c
+++ b/coreutils/uudecode.c
@@ -174,7 +174,7 @@
 		}
 		free(line);
 		ret = decode_fn_ptr(src_stream, dst_stream);
-		bb_fclose_nonstdin(src_stream);
+		fclose_if_not_stdin(src_stream);
 		return(ret);
 	}
 	bb_error_msg_and_die("No `begin' line");
diff --git a/coreutils/wc.c b/coreutils/wc.c
index ebae5f6..4b76e54 100644
--- a/coreutils/wc.c
+++ b/coreutils/wc.c
@@ -107,7 +107,7 @@
 
 	while ((arg = *argv++) != 0) {
 		++num_files;
-		fp = bb_wfopen_input(arg);
+		fp = fopen_or_warn_stdin(arg);
 		if (!fp) {
 			status = EXIT_FAILURE;
 			continue;
@@ -172,7 +172,7 @@
 		}
 		totals[WC_LENGTH] -= counts[WC_LENGTH];
 
-		bb_fclose_nonstdin(fp);
+		fclose_if_not_stdin(fp);
 
 	OUTPUT:
 		/* coreutils wc tries hard to print pretty columns