Visual Studio complains:
vdagent\file_xfer.h(28) : warning C4996: 'strncpy': This function or variable may
Consider using strncpy_s instead.
To disable deprecation, use _CRT_SECURE_NO_WARNINGS.
See online help for details.
Replace strncpy with strcpy_s when building with Visual Studio.
Adjust parameter order and difference in meaning of length:
- length param is last in strncpy and second in strcpy_s
- many calls to strncpy are given length param n-1, as
strncpy does not guarantee that destination ends with '\0'
- it's safer to set length param not larger than sizeof(d)
(assuming d is an array not a pointer)
Trying to use strcpy_s for both Visual Studio and mingw
failed as strcpy_s is missing from the default msvcrt.dll
on WinXP (See OLDMSVCRT in common/vdcommon.h).
---
common/vdcommon.h | 1 +
vdagent/file_xfer.h | 2 ++
2 files changed, 3 insertions(+), 0 deletions(-)
diff --git a/common/vdcommon.h b/common/vdcommon.h
index 568e3ba..f285175 100644
--- a/common/vdcommon.h
+++ b/common/vdcommon.h
@@ -70,6 +70,7 @@ typedef CRITICAL_SECTION mutex_t;
#ifdef _MSC_VER // compiling with Visual Studio
#define snprintf sprintf_s
+#define strncpy(d,s,n) strcpy_s(s, __min(n+1, sizeof(d)), s)
#endif
enum SystemVersion {
diff --git a/vdagent/file_xfer.h b/vdagent/file_xfer.h
index b506f59..07a6808 100644
--- a/vdagent/file_xfer.h
+++ b/vdagent/file_xfer.h
@@ -25,6 +25,8 @@ typedef struct ALIGN_VC FileXferTask {
FileXferTask(HANDLE _handle, uint64_t _size, char* _name):
handle(_handle), size(_size), pos(0) {
// FIXME: should raise an error if name is too long..
+ // currently the only user is FileXfer::handle_start
+ // which verifies that strlen(_name) < MAX_PATH
strncpy(name, _name, sizeof(name) - 1);
}
HANDLE handle;
--
1.7.1
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