diff options
| -rw-r--r-- | src/unistd/renameat.c | 35 |
1 files changed, 31 insertions, 4 deletions
diff --git a/src/unistd/renameat.c b/src/unistd/renameat.c index c3b40a25..07386407 100644 --- a/src/unistd/renameat.c +++ b/src/unistd/renameat.c @@ -1,11 +1,38 @@ +#include <errno.h> +#include <libgen.h> +#include <limits.h> #include <stdio.h> +#include <string.h> #include "syscall.h" int renameat(int oldfd, const char *old, int newfd, const char *new) { -#ifdef SYS_renameat + char old_copy[PATH_MAX+1], new_copy[PATH_MAX+1]; + char *base; + + if (strlen(old) > PATH_MAX || strlen(new) > PATH_MAX) { + errno = ENAMETOOLONG; + return -1; + } + + if (strlen(old) == 0 || strlen(new) == 0) { + errno = ENOENT; + return -1; + } + + strcpy(old_copy, old); + strcpy(new_copy, new); + + base = basename(old_copy); + strncpy(old_copy, base, sizeof(old_copy)); + base = basename(new_copy); + strncpy(new_copy, base, sizeof(new_copy)); + + if (strcmp(old_copy, ".") == 0 || strcmp(old_copy, "..") == 0 || + strcmp(new_copy, ".") == 0 || strcmp(new_copy, "..") == 0) { + errno = EINVAL; + return -1; + } + return syscall(SYS_renameat, oldfd, old, newfd, new); -#else - return syscall(SYS_renameat2, oldfd, old, newfd, new, 0); -#endif } |