linux-kernel - [PATCH] Kconfig:Uses glibc so strscpy has to be manually- added

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Message-ID: <20251021171446.46942-1-biancaa2210329@ssn.edu.in>
Date: Tue, 21 Oct 2025 22:44:46 +0530
From: Biancaa Ramesh <biancaa2210329@....edu.in>
To: linux-kernel@...r.kernel.org
Cc: Biancaa Ramesh <biancaa2210329@....edu.in>
Subject: [PATCH] Kconfig:Uses glibc so strscpy has to be manually- added

Signed-off-by: Biancaa Ramesh <biancaa2210329@....edu.in>
---
 scripts/kconfig/confdata.c | 16 +++++++++++++++-
 scripts/kconfig/symbol.c   | 16 +++++++++++++++-
 scripts/kconfig/util.c     | 17 ++++++++++++++++-
 3 files changed, 46 insertions(+), 3 deletions(-)

diff --git a/scripts/kconfig/confdata.c b/scripts/kconfig/confdata.c
index 9599a0408862..c0fef4cd6b60 100644
--- a/scripts/kconfig/confdata.c
+++ b/scripts/kconfig/confdata.c
@@ -22,6 +22,20 @@
 #include "internal.h"
 #include "lkc.h"
 
+#define HAVE_STRSCPY 0
+#ifndef HAVE_STRSCPY
+static size_t strscpy(char *dest, const char *src, size_t count)
+{
+    size_t i;
+    if (count == 0)
+        return 0;
+    for (i = 0; i < count - 1 && src[i]; i++)
+        dest[i] = src[i];
+    dest[i] = '\0';
+    return i;
+}
+#endif
+
 struct gstr autoconf_cmd;
 
 /* return true if 'path' exists, false otherwise */
@@ -140,7 +154,7 @@ static int conf_touch_dep(const char *name)
 	if (depfile_prefix_len + strlen(name) + 1 > sizeof(depfile_path))
 		return -1;
 
-	strcpy(depfile_path + depfile_prefix_len, name);
+	strscpy(depfile_path + depfile_prefix_len, name);
 
 	fd = open(depfile_path, O_WRONLY | O_CREAT | O_TRUNC, 0644);
 	if (fd == -1)
diff --git a/scripts/kconfig/symbol.c b/scripts/kconfig/symbol.c
index 7e81b3676ee9..0c6746854617 100644
--- a/scripts/kconfig/symbol.c
+++ b/scripts/kconfig/symbol.c
@@ -14,6 +14,20 @@
 #include "internal.h"
 #include "lkc.h"
 
+#define HAVE_STRSCPY 0
+#ifndef HAVE_STRSCPY
+static size_t strscpy(char *dest, const char *src, size_t count)
+{
+    size_t i;
+    if (count == 0)
+        return 0;
+    for (i = 0; i < count - 1 && src[i]; i++)
+        dest[i] = src[i];
+    dest[i] = '\0';
+    return i;
+}
+#endif
+
 struct symbol symbol_yes = {
 	.name = "y",
 	.type = S_TRISTATE,
@@ -795,7 +809,7 @@ bool sym_set_string_value(struct symbol *sym, const char *newval)
 	else
 		return true;
 
-	strcpy(val, newval);
+	strscpy(val, newval);
 	free((void *)oldval);
 	sym_clear_all_valid();
 
diff --git a/scripts/kconfig/util.c b/scripts/kconfig/util.c
index 5cdcee144b58..176ec03bb3f0 100644
--- a/scripts/kconfig/util.c
+++ b/scripts/kconfig/util.c
@@ -13,6 +13,21 @@
 #include <xalloc.h>
 #include "lkc.h"
 
+#define HAVE_STRSCPY 0
+#ifndef HAVE_STRSCPY
+static size_t strscpy(char *dest, const char *src, size_t count)
+{
+    size_t i;
+    if (count == 0)
+        return 0;
+    for (i = 0; i < count - 1 && src[i]; i++)
+        dest[i] = src[i];
+    dest[i] = '\0';
+    return i;
+}
+#endif
+
+
 /* hash table of all parsed Kconfig files */
 static HASHTABLE_DEFINE(file_hashtable, 1U << 11);
 
@@ -52,7 +67,7 @@ struct gstr str_new(void)
 	gs.s = xmalloc(sizeof(char) * 64);
 	gs.len = 64;
 	gs.max_width = 0;
-	strcpy(gs.s, "\0");
+	strscpy(gs.s, "\0");
 	return gs;
 }
 
-- 
2.43.0


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