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libc: implement fstatat by wrapping stat and lstat 

Fixes #403
This commit is contained in:
Emery Hemingway 2015-11-28 18:44:46 +01:00 committed by Christian Helmuth
parent 3087b72438
commit 9f9510ddb1
1 changed files with 30 additions and 0 deletions
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30
repos/libports/src/lib/libc/file_operations.cc
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@ -351,6 +351,36 @@ extern "C" int fstat(int libc_fd, struct stat *buf)
}
extern "C" int fstatat(int libc_fd, char const *path, struct stat *buf, int flags)
{
if (*path == '/') {
if (flags & AT_SYMLINK_NOFOLLOW)
return lstat(path, buf);
return stat(path, buf);
}
Libc::Absolute_path abs_path;
if (libc_fd == AT_FDCWD) {
getcwd(abs_path.base(), abs_path.capacity());
abs_path.append("/");
abs_path.append(path);
} else {
Libc::File_descriptor *fd =
Libc::file_descriptor_allocator()->find_by_libc_fd(libc_fd);
if (!fd) {
errno = EBADF;
return -1;
}
abs_path.import(path, fd->fd_path);
}
return (flags & AT_SYMLINK_NOFOLLOW)
? lstat(abs_path.base(), buf)
: stat(abs_path.base(), buf);
}
extern "C" int _fstatfs(int libc_fd, struct statfs *buf) {
FD_FUNC_WRAPPER(fstatfs, libc_fd, buf); }