fdopendir() requires a call to fstat() to determine if the opened file is a directory. Currently opendir() inherits this extra syscall.
Switch to O_DIRECTORY and remove the call to fdopendir() in opendir() to make the directory type check cheaper. Signed-off-by: Thomas Weißschuh <[email protected]> --- tools/include/nolibc/dirent.h | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) diff --git a/tools/include/nolibc/dirent.h b/tools/include/nolibc/dirent.h index 25fbff208998..2dbf4052b85a 100644 --- a/tools/include/nolibc/dirent.h +++ b/tools/include/nolibc/dirent.h @@ -55,10 +55,11 @@ DIR *opendir(const char *name) { int fd; - fd = open(name, O_RDONLY); + fd = open(name, O_RDONLY | O_DIRECTORY); if (fd == -1) return NULL; - return fdopendir(fd); + + return (DIR *)(intptr_t)~fd; } static __attribute__((unused)) -- 2.55.0
