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(defun sys:do-path-test (statfun path testfun)
[testfun (if (stringp path) (ignerr [statfun path]) path)])
(defmacro sys:path-test ((var statfun path) . body)
^[sys:do-path-test ,statfun ,path
(lambda (,var) (when ,var ,*body))])
(defun sys:path-test-mode (statfun path mask)
(sys:path-test (s statfun path)
(let ((m (prop s :mode)))
(if (plusp (logand m mask)) t))))
(defun path-exists-p (path)
(sys:path-test (s stat path) t))
(defun path-file-p (path)
[sys:path-test-mode stat path s-ifreg])
(defun path-dir-p (path)
[sys:path-test-mode stat path s-ifdir])
(defun path-symlink-p (path)
[sys:path-test-mode lstat path s-iflnk])
(defun path-blkdev-p (path)
[sys:path-test-mode stat path s-ifblk])
(defun path-chrdev-p (path)
[sys:path-test-mode stat path s-ifchr])
(defun path-sock-p (path)
[sys:path-test-mode stat path s-ifsock])
(defun path-pipe-p (path)
[sys:path-test-mode stat path s-ififo])
(defun path-setgid-p (path)
[sys:path-test-mode stat path s-isgid])
(defun path-setuid-p (path)
[sys:path-test-mode stat path s-isuid])
(defun path-sticky-p (path)
[sys:path-test-mode stat path s-isvtx])
(defun path-mine-p (path)
(sys:path-test (s stat path)
(let ((u (prop s :uid)))
(= u (geteuid)))))
(defun path-my-group-p (path)
(sys:path-test (s stat path)
(let ((g (prop s :gid)))
(or (= g (getegid))
(find g (getgroups))))))
(defun sys:path-access (path umask gmask omask)
(sys:path-test (s stat path)
(let ((m (prop s :mode))
(euid (geteuid)))
(cond
((zerop euid) (or (zerop (logior umask s-ixusr))
(plusp (logand m (logior umask gmask omask)))))
((= euid (prop s :uid)) (plusp (logand m umask)))
((let ((g (prop s :gid)))
(or (= g (getegid))
(find g (getgroups))))
(plusp (logand m gmask)))
(t (plusp (logand m omask)))))))
(defun path-executable-to-me-p (path)
(sys:path-access path s-ixusr s-ixgrp s-ixoth))
(defun path-writable-to-me-p (path)
(sys:path-access path s-iwusr s-iwgrp s-iwoth))
(defmacro sys:path-examine ((var statfun path) . body)
^[sys:do-path-test ,statfun ,path
(lambda (,var) ,*body)])
(defun path-newer (path-0 path-1)
(sys:path-examine (s0 stat path-0)
(sys:path-examine (s1 stat path-1)
(and s0 (or (not s1)
(> (prop s0 :mtime)
(prop s1 :mtime)))))))
(defun path-older (path-0 path-1)
(path-newer path-1 path-0))
(defun path-same-object (path-0 path-1)
(sys:path-examine (s0 stat path-0)
(sys:path-examine (s1 stat path-1)
(and s0 s1
(eql (prop s0 :dev)
(prop s1 :dev))
(eql (prop s0 :ino)
(prop s1 :ino))))))
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