use alt signal stack when present for implementation-internal signals

[musl] / src / dirent / fdopendir.c

diff --git a/src/dirent/fdopendir.c b/src/dirent/fdopendir.c
index c4b8e61..d78fb87 100644 (file)
--- a/src/dirent/fdopendir.c
+++ b/src/dirent/fdopendir.c
@@ -3,8 +3,6 @@
 #include <sys/stat.h>
 #include <errno.h>
 #include <stdlib.h>
-#include <unistd.h>
-#include <limits.h>
 #include "__dirent.h"
 
 DIR *fdopendir(int fd)
@@ -12,7 +10,14 @@ DIR *fdopendir(int fd)
        DIR *dir;
        struct stat st;
 
-       if (fstat(fd, &st) < 0 || !S_ISDIR(st.st_mode)) {
+       if (fstat(fd, &st) < 0) {
+               return 0;
+       }
+       if (fcntl(fd, F_GETFL) & O_PATH) {
+               errno = EBADF;
+               return 0;
+       }
+       if (!S_ISDIR(st.st_mode)) {
                errno = ENOTDIR;
                return 0;
        }