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curlx: curlx_strcopy() instead of strcpy()

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This function REQUIRES the size of the target buffer as well as the
length of the source string. Meant to make it harder to do a bad
strcpy().

Removes 23 calls to strcpy().

Closes #20067
This commit is contained in:
Daniel Stenberg 2025-12-21 23:40:24 +01:00
parent f099c2ca55
commit a535be4ea0
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GPG key ID: 5CC908FDB71E12C2
30 changed files with 195 additions and 97 deletions
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4
lib/curlx/winapi.c
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@ -30,6 +30,7 @@
#ifdef _WIN32
#include "winapi.h"
#include "snprintf.h"
#include "strcopy.h"
/* This is a helper function for curlx_strerror that converts Windows API error
* codes (GetLastError) to error messages.
@ -93,8 +94,7 @@ const char *curlx_winapi_strerror(DWORD err, char *buf, size_t buflen)
#else
{
const char *txt = (err == ERROR_SUCCESS) ? "No error" : "Error";
if(strlen(txt) < buflen)
strcpy(buf, txt);
curlx_strcopy(buf, buflen, txt, strlen(txt));
}
#endif