src/dirent/fdopendir.c

   1 #include <dirent.h>
   2 #include <fcntl.h>
   3 #include <sys/stat.h>
   4 #include <errno.h>
   5 #include <stdlib.h>
   6 #include "__dirent.h"
   7
   8 DIR *fdopendir(int fd)
   9 {
  10         DIR *dir;
  11         struct stat st;
  12
  13         if (fstat(fd, &st) < 0) {
  14                 return 0;
  15         }
  16         if (fcntl(fd, F_GETFL) & O_PATH) {
  17                 errno = EBADF;
  18                 return 0;
  19         }
  20         if (!S_ISDIR(st.st_mode)) {
  21                 errno = ENOTDIR;
  22                 return 0;
  23         }
  24         if (!(dir = calloc(1, sizeof *dir))) {
  25                 return 0;
  26         }
  27
  28         fcntl(fd, F_SETFD, FD_CLOEXEC);
  29         dir->fd = fd;
  30         return dir;
  31 }