+ user-effective-uid and -gid per thread.
+ alignments for euid- and egid-resource + argument to chdir is now optional and defaults to (home-dir)
This commit is contained in:
mainzelm
parent
cf7b089f09
commit
ff0ce8fdfb
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@ -54,7 +54,7 @@
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;;; broken exception system
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(else (list err syscall fname)))))
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(with-resources-aligned
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(list cwd-resource umask-resource)
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(list cwd-resource umask-resource euid-resource egid-resource)
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(lambda ()
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(makeit fname)))
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#f))))
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@ -116,6 +116,6 @@
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(y-or-n? (string-append "rename-file:" new-fname
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" already exists. Delete"))))
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(with-resources-aligned
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(list cwd-resource)
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(list cwd-resource euid-resource egid-resource)
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(lambda ()
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(%rename-file old-fname new-fname))))))
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@ -374,7 +374,14 @@
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user-supplementary-gids
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set-uid
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set-gid
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set-effective-gid
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set-user-effective-uid
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set-user-effective-gid
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with-user-effective-uid*
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with-user-effective-gid*
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((with-user-effective-uid
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with-user-effective-gid):syntax)
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euid-resource
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egid-resource
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system-name
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process-times
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129
scsh/scsh.scm
129
scsh/scsh.scm
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@ -179,11 +179,12 @@
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(if (not (string=? thread-cwd (cwd-cache)))
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(change-and-cache-cwd thread-cwd))))
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(define (chdir cwd)
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(with-lock cwd-lock
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(lambda ()
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(change-and-cache-cwd cwd)
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(thread-set-cwd! (cwd-cache)))))
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(define (chdir . maybe-dir)
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(let ((dir (:optional maybe-dir (home-dir))))
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(with-lock cwd-lock
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(lambda ()
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(change-and-cache-cwd dir)
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(thread-set-cwd! (cwd-cache))))))
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(define-record-type resource :resource
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(make-resource align! lock)
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@ -212,7 +213,7 @@
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;; (with-cwd-aligned (really-delete-file fname)))
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(define cwd-reinitializer
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(make-reinitializer (lambda () (warn "calling resumer") (initialize-cwd))))
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(make-reinitializer (lambda () (initialize-cwd))))
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(initialize-cwd)
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@ -255,11 +256,6 @@
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(umask-cache)))))
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(let-umask changed-umask thunk)))
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;; Align the value of the Unix umask with scsh's value.
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;; Since another thread could disalign, this call and
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;; any ensuring syscall that relies upon it should
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;; be "glued together" with the umask lock.
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(define (align-umask!)
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(let ((thread-umask (umask)))
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(if (not (= thread-umask (umask-cache)))
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@ -273,22 +269,102 @@
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(define umask-resource (make-resource align-umask! umask-lock))
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;; example syscall
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;; (define (exported-delete-file fname)
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;; (with-cwd-aligned (really-delete-file fname)))
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(define umask-reinitializer
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(make-reinitializer (lambda () (warn "calling resumer") (initialize-umask))))
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(make-reinitializer (lambda () (initialize-umask))))
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(initialize-umask)
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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;;; effective uid and gid per thread
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(define-syntax make-Xid-resource
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(syntax-rules ()
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((make-Xid-resource
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process-user-effective-Xid set-process-user-effective-Xid
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process-set-Xid set-Xid
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align-eXid! eXid-resource
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user-effective-Xid set-user-effective-Xid with-user-effective-Xid*)
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(begin
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(define *eXid-cache* 'uninitialized)
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(define eXid-lock (make-lock))
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(define (initialize-eXid)
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(set! *eXid-cache* (process-user-effective-Xid))
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(set! $eXid
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(make-preserved-thread-fluid
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(eXid-cache))))
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(define (eXid-cache)
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*eXid-cache*)
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;; Actually do the syscall and update the cache
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;; assumes the resource lock obtained
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(define (change-and-cache-eXid new-eXid)
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(set-process-user-effective-Xid new-eXid)
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(set! *eXid-cache* (process-user-effective-Xid)))
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;; The thread-specific eXid: A thread fluid
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(define $eXid 'empty-eXid-value)
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(define (user-effective-Xid) (thread-fluid $eXid))
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(define (thread-set-eXid! new-eXid) (set-thread-fluid! $eXid new-eXid))
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(define (let-eXid new-eXid thunk)
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(let-thread-fluid $eXid new-eXid thunk))
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;; set-Xid will affect the effective X id
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(define (set-Xid Xid)
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(with-lock eXid-lock
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(lambda ()
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(process-set-Xid Xid)
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(set! *eXid-cache* (process-user-effective-Xid)))))
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(define (with-user-effective-Xid* new-eXid thunk)
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(let ((changed-eXid
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(with-lock eXid-lock
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(lambda ()
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(change-and-cache-eXid new-eXid)
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(eXid-cache)))))
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(let-eXid changed-eXid thunk)))
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(define (align-eXid!)
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(let ((thread-eXid (user-effective-Xid)))
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(if (not (= thread-eXid (eXid-cache)))
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(change-and-cache-eXid thread-eXid))))
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(define (set-user-effective-Xid new-eXid)
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(with-lock eXid-lock
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(lambda ()
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(change-and-cache-eXid new-eXid)
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(thread-set-eXid! (eXid-cache)))))
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(define eXid-resource (make-resource align-eXid! eXid-lock))
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(define eXid-reinitializer
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(make-reinitializer (lambda () (initialize-eXid))))
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(initialize-eXid)
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))))
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(make-Xid-resource
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process-user-effective-uid set-process-user-effective-uid
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process-set-uid set-uid
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align-euid! euid-resource
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user-effective-uid set-user-effective-uid with-user-effective-uid*)
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(make-Xid-resource
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process-user-effective-gid set-process-user-effective-gid
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process-set-gid set-gid
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align-egid! egid-resource
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user-effective-gid set-user-effective-gid with-user-effective-gid*)
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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;;; ensure S48 is aligned too
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(set-with-fs-context-aligned*!
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(lambda (thunk)
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(with-resources-aligned (list cwd-resource umask-resource) thunk)))
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(with-resources-aligned
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(list cwd-resource umask-resource euid-resource egid-resource)
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thunk)))
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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;;; Environment per thread
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@ -326,11 +402,6 @@
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(change-and-cache-env env)))
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(let-env env thunk))
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;; Align the value of the Unix env with scsh's value.
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;; Since another thread could disalign, this call and
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;; any ensuring syscall that relies upon it should
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;; be "glued together" with the env lock.
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(define (align-env!)
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(let ((res (thread-read-env)))
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(if (not (env=? res (env-cache)))
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@ -344,10 +415,6 @@
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(define environ-resource (make-resource align-env! env-lock))
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;; example syscall
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;; (define (exported-delete-file fname)
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;; (with-cwd-aligned (really-delete-file fname)))
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(define env-reinitializer
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(make-reinitializer install-env))
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@ -519,6 +586,11 @@
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(define-simple-syntax (with-total-env env . body)
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(with-total-env* `env (lambda () . body)))
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(define-simple-syntax (with-user-effective-uid uid . body)
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(with-user-effective-uid* uid (lambda () . body)))
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(define-simple-syntax (with-user-effective-gid gid . body)
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(with-user-effective-gid* gid (lambda () . body)))
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(define (call/temp-file writer user)
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(let ((fname #f))
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@ -947,7 +1019,8 @@
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(define (exec/env prog env . arglist)
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(flush-all-ports)
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(with-resources-aligned (list environ-resource cwd-resource umask-resource)
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(with-resources-aligned
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(list environ-resource cwd-resource umask-resource euid-resource egid-resource)
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(lambda ()
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(%exec prog (cons prog arglist) env))))
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@ -964,7 +1037,7 @@
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(define (exec-path/env prog env . arglist)
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(flush-all-ports)
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(with-resources-aligned
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(list environ-resource cwd-resource umask-resource)
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(list environ-resource cwd-resource umask-resource euid-resource egid-resource)
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(lambda ()
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(let ((prog (stringify prog)))
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(if (string-index prog #\/)
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@ -15,7 +15,7 @@
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;;; You can't throw an error within a handler
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;;;
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;;; Move this to somewhere else as soon as Marc published his SRFI
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;;; Move this to somewhere else as soon as Marc has published his SRFI
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(define (continuation-capture receiver)
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((call-with-current-continuation
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(lambda (cont)
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@ -111,22 +111,22 @@
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(import-os-error-syscall user-gid () "scsh_getgid")
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(import-os-error-syscall user-effective-gid () "scsh_getegid")
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(import-os-error-syscall process-user-effective-gid () "scsh_getegid")
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(import-os-error-syscall set-gid (gid) "scsh_setgid")
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(import-os-error-syscall process-set-gid (gid) "scsh_setgid")
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(import-os-error-syscall set-effective-gid (gid) "scsh_setegid")
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(import-os-error-syscall set-process-user-effective-gid (gid) "scsh_setegid")
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(import-os-error-syscall user-supplementary-gids () "get_groups")
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;;; UID
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(import-os-error-syscall user-uid () "scsh_getuid")
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(import-os-error-syscall user-effective-uid () "scsh_geteuid")
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(import-os-error-syscall process-user-effective-uid () "scsh_geteuid")
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(import-os-error-syscall set-uid (uid) "scsh_setuid")
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(import-os-error-syscall process-set-uid (uid) "scsh_setuid")
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(import-os-error-syscall set-effective-uid (uid) "scsh_seteuid")
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(import-os-error-syscall set-process-user-effective-uid (uid) "scsh_seteuid")
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(import-os-error-syscall %user-login-name () "my_username")
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@ -184,7 +184,8 @@
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(define (generic-file-op thing fd-op fname-op)
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(if (string? thing)
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(with-resources-aligned (list cwd-resource) (lambda () (fname-op thing)))
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(with-resources-aligned (list cwd-resource euid-resource egid-resource)
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(lambda () (fname-op thing)))
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(call/fdes thing fd-op)))
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@ -341,7 +342,8 @@
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(import-os-error-syscall %delete-file (path) "scsh_unlink")
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(define (delete-file path)
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(with-resources-aligned (list cwd-resource) (lambda () (%delete-file path))))
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(with-resources-aligned (list cwd-resource euid-resource egid-resource)
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(lambda () (%delete-file path))))
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(import-os-error-syscall %sync-file (fd) "scsh_fsync")
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@ -384,7 +386,7 @@
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(define (open-fdes path flags . maybe-mode) ; mode defaults to 0666
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(with-resources-aligned
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(list cwd-resource umask-resource)
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(list cwd-resource umask-resource euid-resource egid-resource)
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(lambda ()
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(%open path flags (:optional maybe-mode #o666)))))
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@ -535,7 +537,7 @@
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(define (directory-files . args)
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(with-resources-aligned
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(list cwd-resource)
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(list cwd-resource euid-resource egid-resource)
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(lambda ()
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(let-optionals args ((dir ".")
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(dotfiles? #f))
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