From 615828721abfe8c73b5103d4436402ecbf9b9897 Mon Sep 17 00:00:00 2001 From: Matthias Schiffer Date: Fri, 14 Jul 2023 13:24:50 +0200 Subject: Revert "lib: string: Fix strlcpy return value", fix callers Both the Linux kernel and libbsd agree that strlcpy() should always return strlen(src) and not include the NUL termination. The incorrect U-Boot implementation makes it impossible to check the return value for truncation, and breaks code written with the usual implementation in mind (for example, fdtdec_add_reserved_memory() was subtly broken). I reviewed all callers of strlcpy() and strlcat() and fixed them according to my understanding of the intended function. This reverts commit d3358ecc54be0bc3b4dd11f7a63eab0a2842f772 and adds related fixes. Fixes: d3358ecc54be ("lib: string: Fix strlcpy return value") Signed-off-by: Matthias Schiffer Reviewed-by: Simon Glass Reviewed-by: Sean Anderson --- lib/string.c | 14 +++++++------- 1 file changed, 7 insertions(+), 7 deletions(-) (limited to 'lib/string.c') diff --git a/lib/string.c b/lib/string.c index ecea755..f2c6147 100644 --- a/lib/string.c +++ b/lib/string.c @@ -116,20 +116,18 @@ char * strncpy(char * dest,const char *src,size_t count) * of course, the buffer size is zero). It does not pad * out the result like strncpy() does. * - * Return: the number of bytes copied + * Return: strlen(src) */ size_t strlcpy(char *dest, const char *src, size_t size) { - if (size) { - size_t srclen = strlen(src); - size_t len = (srclen >= size) ? size - 1 : srclen; + size_t ret = strlen(src); + if (size) { + size_t len = (ret >= size) ? size - 1 : ret; memcpy(dest, src, len); dest[len] = '\0'; - return len + 1; } - - return 0; + return ret; } #endif @@ -191,6 +189,8 @@ char * strncat(char *dest, const char *src, size_t count) * Compatible with *BSD: the result is always a valid NUL-terminated string that * fits in the buffer (unless, of course, the buffer size is zero). It does not * write past @size like strncat() does. + * + * Return: min(strlen(dest), size) + strlen(src) */ size_t strlcat(char *dest, const char *src, size_t size) { -- cgit v1.1