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tools/nolibc: Fix strlcpy() return code and size usage

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The return code should always be strlen(src), and we should copy at most
size-1 bytes.

While we are there, make sure to null-terminate the dst buffer if we
copied something.

Signed-off-by: Rodrigo Campos <rodrigo@sdfg.com.ar>
Signed-off-by: Thomas Weißschuh <linux@weissschuh.net>
This commit is contained in:
Rodrigo Campos 2024-02-18 16:51:05 -03:00 • committed by Thomas Weißschuh
parent 34d232c39a
commit fbffce819e
1 changed files with 10 additions and 8 deletions
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18
tools/include/nolibc/string.h
View file

@ -219,16 +219,18 @@ static __attribute__((unused))
size_t strlcpy(char *dst, const char *src, size_t size)
{
size_t len;
char c;
for (len = 0;;) {
c = src[len];
if (len < size)
dst[len] = c;
if (!c)
break;
len++;
for (len = 0; len < size; len++) {
dst[len] = src[len];
if (!dst[len])
return len;
}
if (size)
dst[size-1] = '\0';
while (src[len])
len++;
return len;
}