util/mkhtemp: new utility (hardened mktemp)

part of the same code library as nvmutil.

as part of this, i renamed util/nvmutil
to util/libreboot-utils/ because it is
now a multi-utility codebase.

this is more efficient, since i also wish
to use mkhtemp (function) in nvmutil.

Signed-off-by: Leah Rowe <leah@libreboot.org>

1 files changed, 0 insertions, 114 deletions

diff --git a/util/nvmutil/lib/string.c b/util/nvmutil/lib/string.c
deleted file mode 100644
index ca58fb1c..00000000
--- a/util/nvmutil/lib/string.c
+++ /dev/null
@@ -1,114 +0,0 @@
-/* SPDX-License-Identifier: MIT
- * Copyright (c) 2026 Leah Rowe <leah@libreboot.org>
- *
- * String functions
- */
-
-#include <sys/types.h>
-#include <sys/stat.h>
-
-#include <errno.h>
-#include <stddef.h>
-#include <string.h>
-#include <unistd.h>
-
-#include "../include/common.h"
-
-/* scmp() - strict string comparison
- *
- * strict string comparison
- * similar to strncmp, but null and
- * unterminated inputs do not produce
- * a return value; on error, errno is
- * set and -1 is returned.
- *
- * the real return value is stored in
- * the 4th argument by pointer.
- *
- * the value at rval pointer is set,
- * only upon success. callers should
- * check the return value accordingly.
- */
-
-int
-scmp(const char *a,
-    const char *b,
-    size_t maxlen,
-    int *rval)
-{
-	size_t ch;
-	unsigned char ac;
-	unsigned char bc;
-
-	if (a == NULL ||
-	    b == NULL ||
-	    rval == NULL) {
-
-		errno = EFAULT;
-		return -1;
-	}
-
-	for (ch = 0; ch < maxlen; ch++) {
-
-		ac = (unsigned char)a[ch];
-		bc = (unsigned char)b[ch];
-
-		if (ac != bc) {
-			*rval = ac - bc;
-			return 0;
-		}
-
-		if (ac == '\0') {
-			*rval = 0;
-			return 0;
-		}
-	}
-
-	/* block unterminated strings */
-	errno = EFAULT;
-	return -1;
-}
-
-/* slen() - strict strict length
- *
- * strict string length calculation
- * similar to strnlen, but null and
- * unterminated inputs do not produce
- * a return value; on error, errno is
- * set and -1 is returned.
- *
- * the real return value is stored in
- * the 3rd argument by pointer.
- *
- * the value at rval pointer is set,
- * only upon success. callers should
- * check the return value accordingly.
- */
-
-int
-slen(const char *s,
-    size_t maxlen,
-    size_t *rval)
-{
-	size_t ch;
-
-	if (s == NULL ||
-	    rval == NULL) {
-
-		errno = EFAULT;
-		return -1;
-	}
-
-	for (ch = 0;
-	    ch < maxlen && s[ch] != '\0';
-	    ch++);
-
-	if (ch == maxlen) {
-		/* unterminated */
-		errno = EFAULT;
-		return -1;
-	}
-
-	*rval = ch;
-	return 0;
-}