github.com/afumu/libc@v0.0.6/musl/src/dirent/fdopendir.c (about)

     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  }