[PATCH v2 1/2] x86: add strlcat() to compressed kernel

From: Baskov Evgeniy
Date: Wed May 04 2022 - 16:41:57 EST


strlcat() simplifies the code of command line
concatenation and reduces the probability of mistakes.

Signed-off-by: Baskov Evgeniy <baskov@xxxxxxxxx>

diff --git a/arch/x86/boot/compressed/string.c b/arch/x86/boot/compressed/string.c
index 81fc1eaa3229..b0635539b6f6 100644
--- a/arch/x86/boot/compressed/string.c
+++ b/arch/x86/boot/compressed/string.c
@@ -40,6 +40,21 @@ static void *____memcpy(void *dest, const void *src, size_t n)
}
#endif

+size_t strlcat(char *dest, const char *src, size_t count)
+{
+ size_t dsize = strlen(dest);
+ size_t len = strlen(src);
+ size_t res = dsize + len;
+
+ dest += dsize;
+ count -= dsize;
+ if (len >= count)
+ len = count-1;
+ memcpy(dest, src, len);
+ dest[len] = 0;
+ return res;
+}
+
void *memset(void *s, int c, size_t n)
{
int i;
--
2.36.0