#endif
/* Construct a string NEW_DEST by concatenating DEST, a slash, and
- basename(SOURCE) in alloca'd memory. Don't modify DEST or SOURCE. */
+ basename (SOURCE) in alloca'd memory. Don't modify DEST or SOURCE.
+ Omit unnecessary slashes in the boundary between DEST and SOURCE in
+ the result; they can cause harm if "/" and "//" denote different
+ directories. */
#define FILE_BASENAME_CONCAT(new_dest, dest, source) \
do \
const char *source_base; \
char *tmp_source; \
size_t buf_len = strlen (source) + 1; \
+ size_t dest_len = strlen (dest); \
\
tmp_source = alloca (buf_len); \
memcpy (tmp_source, (source), buf_len); \
strip_trailing_slashes (tmp_source); \
source_base = base_name (tmp_source); \
- \
- (new_dest) = alloca (strlen ((dest)) + 1 \
- + strlen (source_base) + 1); \
- stpcpy (stpcpy (stpcpy ((new_dest), (dest)), "/"), source_base);\
+ source_base += (source_base[0] == '/'); \
+ dest_len -= (dest_len != 0 && (dest)[dest_len - 1] == '/'); \
+ (new_dest) = alloca (dest_len + 1 + strlen (source_base) + 1); \
+ memcpy (new_dest, dest, dest_len); \
+ (new_dest)[dest_len] = '/'; \
+ strcpy ((new_dest) + dest_len + 1, source_base); \
} \
while (0)