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Fix a bug that affected unterminated buffers: strlcat() would write a NUL

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past the end of the buffer and return one less than the correct length.
This commit is contained in:
Dag-Erling Smørgrav 2014-07-13 20:42:56 +00:00 committed by des
parent 08208a1b3e
commit 3ed82792fc
1 changed files with 6 additions and 5 deletions
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9
lib/core/cryb_strlcat.c
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@ -43,10 +43,11 @@ cryb_strlcat(char *dst, const char *src, size_t size)
{ {
size_t len; size_t len;
for (len = 0; *dst && size > 1; ++len, --size) for (len = 0; *dst && len < size; ++len, ++dst)
dst++; /* nothing */;
for (; *src && size > 1; ++len, --size) for (; *src && len + 1 < size; ++len, ++src, ++dst)
*dst++ = *src++; *dst = *src;
if (len < size)
*dst = '\0'; *dst = '\0';
while (*src) while (*src)
++len, ++src; ++len, ++src;