1144 lines
34 KiB
Scheme
1144 lines
34 KiB
Scheme
;;; POSIX system-call Scheme binding.
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;;; Copyright (c) 1993 by Olin Shivers. See file COPYING.
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;;; Scheme48 implementation.
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;;; Need to rationalise names here. getgid. get-gid. "effective" as morpheme?
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(foreign-source
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"#include <sys/signal.h>"
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"#include <sys/types.h>"
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"#include <sys/times.h>"
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"#include <sys/time.h>"
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"#include <fcntl.h> /* for O_RDWR */" ; ???
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"#include <sys/stat.h>"
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"#include <errno.h>"
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"#include <netdb.h>"
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"#include <pwd.h>"
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"#include <unistd.h>"
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""
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"/* Make sure foreign-function stubs interface to the C funs correctly: */"
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"#include \"dirstuff1.h\""
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"#include \"fdports1.h\""
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"#include \"select1.h\""
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"#include \"syscalls1.h\""
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"#include \"userinfo1.h\""
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""
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"#define errno_on_zero_or_false(x) ((x) ? SCHFALSE : ENTER_FIXNUM(errno))"
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"#define errno_or_false(x) (((x) == -1) ? ENTER_FIXNUM(errno) : SCHFALSE)"
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"#define False_on_zero(x) ((x) ? ENTER_FIXNUM(x) : SCHFALSE)" ; Not a function.
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"" "")
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;;; Macro for converting syscalls that return error codes to ones that
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;;; raise exceptions on errors.
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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;;; DEFINE-ERRNO-SYSCALL defines an error-signalling syscall procedure from
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;;; one that returns an error code as its first return value -- #f for win,
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;;; errno for lose. If the error code is ERRNO/INTR (interrupted syscall),
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;;; we try again.
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;;;
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;;; (define-errno-syscall (SYSCALL ARGS) SYSCALL/ERRNO . RET-VALS) ==>
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;;;
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;;; (define (SYSCALL . ARGS)
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;;; (receive (err . RET-VALS) (SYSCALL/ERRNO . ARGS)
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;;; (cond ((not err) (values . RET-VALS)) ; Win
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;;; ((= err errno/intr) (SYSCALL . ARGS)) ; Retry
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;;; (else (errno-error err SYSCALL . ARGS))))); Lose
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(define-syntax define-errno-syscall
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(syntax-rules ()
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((define-errno-syscall (syscall arg ...) syscall/errno
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ret-val ...)
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(define (syscall arg ...)
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(receive (err ret-val ...) (syscall/errno arg ...)
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(cond ((not err) (values ret-val ...)) ; Win
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((= err errno/intr) (syscall arg ...)) ; Retry
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(else (errno-error err syscall arg ...)))))) ; Lose
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;;; This case handles rest args
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((define-errno-syscall (syscall . args) syscall/errno
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ret-val ...)
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(define (syscall . args)
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(receive (err ret-val ...) (apply syscall/errno args)
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(cond ((not err) (values ret-val ...)) ; Win
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((= err errno/intr) (apply syscall args)) ; Retry
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(else (apply errno-error err syscall args)))))))); Lose
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;;; By the way, it would be better to insert a (LET LP () ...) for the
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;;; the errno/intr retries, instead of calling the top-level definition
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;;; (because in Scheme you have to allow for the fact that top-level
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;;; defns can be re-defined, so the compiler can't just turn it into a
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;;; jump), but the brain-dead S48 byte-compiler will cons a closure for
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;;; the LP loop, which means that little syscalls like read-char can cons
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;;; like crazy. So I'm doing it this way. Ech.
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;;; Process
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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(define-foreign %%exec/errno
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(scheme_exec (string prog)
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(vector-desc argv)
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(desc env)) ; string vector or #t.
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integer)
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(define (%%exec prog argv env)
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(errno-error (%%exec/errno prog argv env) %exec prog argv env)) ; cute.
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(define (%exec prog arg-list env)
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(let ((argv (mapv! stringify (list->vector arg-list)))
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(prog (stringify prog))
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(env (if (eq? env #t) #t (alist->env-vec env))))
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(%%exec prog argv env)))
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(define-foreign exit/errno ; errno -- misnomer.
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(exit (integer status))
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ignore)
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(define-foreign %exit/errno ; errno -- misnomer
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(_exit (integer status))
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ignore)
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(define (%exit . maybe-status)
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(%exit/errno (:optional maybe-status 0))
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(error "Yikes! %exit returned."))
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(define-foreign %%fork/errno (fork)
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(multi-rep (to-scheme pid_t errno_or_false)
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pid_t))
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;;; If the fork fails, and we are doing early zombie reaping, then reap
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;;; some zombies to try and free up a some space in the process table,
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;;; and try again.
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;;;
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;;; This ugly little hack will have to stay in until I do early
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;;; zombie reaping with SIGCHLD interrupts.
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(define (%%fork-with-retry/errno)
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(receive (err pid) (%%fork/errno)
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(cond ((and err (eq? 'early (autoreap-policy)))
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(reap-zombies)
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(%%fork/errno))
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(else (values err pid)))))
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(define-errno-syscall (%%fork) %%fork-with-retry/errno
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pid)
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;;; Posix waitpid(2) call.
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(define-foreign %wait-pid/errno (wait_pid (integer pid) (integer options))
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desc ; errno or #f
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integer ; process' id
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integer) ; process' status
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;;; Miscellaneous process state
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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;;; Working directory
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(define-foreign %chdir/errno
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(chdir (string directory))
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(to-scheme integer errno_or_false))
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(define-errno-syscall (%chdir dir) %chdir/errno)
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(define (chdir . maybe-dir)
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(let ((dir (:optional maybe-dir (home-dir))))
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(%chdir (ensure-file-name-is-nondirectory dir))))
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(define-foreign cwd/errno (scheme_cwd)
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(to-scheme integer "False_on_zero") ; errno or #f
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string) ; directory (or #f on error)
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(define-errno-syscall (cwd) cwd/errno
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dir)
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;;; GID
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(define-foreign user-gid (getgid) gid_t)
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(define-foreign user-effective-gid (getegid) gid_t)
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(define-foreign set-gid/errno (setgid (gid_t id)) no-declare ; for SunOS 4.x
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(to-scheme integer errno_or_false))
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(define-errno-syscall (set-gid gid) set-gid/errno)
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(define-foreign %num-supplementary-gids/errno (num_supp_groups)
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(multi-rep (to-scheme integer errno_or_false)
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integer))
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(define-foreign load-groups/errno (get_groups (vector-desc group-vec))
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(multi-rep (to-scheme integer errno_or_false)
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integer))
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(define (user-supplementary-gids)
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(receive (err numgroups) (%num-supplementary-gids/errno)
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(if err (errno-error err user-supplementary-gids)
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(let ((vec (make-vector numgroups)))
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(receive (err numgroups2) (load-groups/errno vec)
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(if err (errno-error err user-supplementary-gids)
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(vector->list vec)))))))
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;;; UID
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(define-foreign user-uid (getuid) uid_t)
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(define-foreign user-effective-uid (geteuid) uid_t)
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(define-foreign set-uid/errno (setuid (uid_t id)) no-declare ; for SunOS 4.x
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(to-scheme integer errno_or_false))
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(define-errno-syscall (set-uid uid_t) set-uid/errno)
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(define-foreign %user-login-name (my_username)
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static-string)
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(define (user-login-name)
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(or (%user-login-name)
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(error "Cannot get your name")))
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;;; PID
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(define-foreign pid (getpid) pid_t)
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(define-foreign parent-pid (getppid) pid_t)
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;;; Process groups and session ids
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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(define-foreign process-group (getpgrp) pid_t)
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(define-foreign %set-process-group/errno
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(setpgid (pid_t pid) (pid_t groupid))
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(to-scheme integer errno_or_false))
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(define-errno-syscall (%set-process-group pid pgrp)
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%set-process-group/errno)
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(define (set-process-group arg1 . maybe-arg2)
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(receive (pid pgrp) (if (null? maybe-arg2)
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(values (pid) arg1)
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(values arg1 (car maybe-arg2)))
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(%set-process-group pid pgrp)))
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(define-foreign become-session-leader/errno (setsid)
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(multi-rep (to-scheme pid_t errno_or_false)
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pid_t))
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(define-errno-syscall (become-session-leader) become-session-leader/errno
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sid)
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;;; UMASK
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(define-foreign set-umask (umask (mode_t mask)) no-declare ; integer on SunOS
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mode_t)
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(define (umask)
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(let ((m (set-umask 0)))
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(set-umask m)
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m))
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;;; PROCESS TIMES
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;;; OOPS: The POSIX times() has a mildly useful ret value we are throwing away.
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;;; OOPS: The ret values should be clock_t, not int, but cig can't handle it.
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(define-foreign process-times/errno (process_times)
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(to-scheme integer errno_or_false)
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integer ; user cpu time
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integer ; system cpu time
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integer ; user cpu time for me and all my descendants.
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integer) ; system cpu time for me and all my descendants.
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(define-errno-syscall (process-times) process-times/errno
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utime stime cutime cstime)
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(define-foreign cpu-ticks/sec (cpu_clock_ticks_per_sec) integer)
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;;; File system
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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;;; Useful little utility for generic ops that work on filenames, fd's or
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;;; ports.
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(define (generic-file-op thing fd-op fname-op)
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(if (string? thing) (fname-op thing)
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(call/fdes thing fd-op)))
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(define-foreign set-file-mode/errno
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(chmod (string path) (mode_t mode)) no-declare ; integer on SunOS
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(to-scheme integer errno_or_false))
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; IBM's AIX include files declare fchmod(char*, mode_t).
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; Amazing, but true. So we must prevent this def-foreign from issuing
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; the conflicting, correct declaration. Hence the NO-DECLARE.
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(define-foreign set-fdes-mode/errno
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(fchmod (integer fd) (mode_t mode)) ; integer on SunOS
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no-declare ; Workaround for AIX bug.
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(to-scheme integer errno_or_false))
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(define-errno-syscall (set-file-mode thing mode)
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(lambda (thing mode)
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(generic-file-op thing
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(lambda (fd) (set-fdes-mode/errno fd mode))
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(lambda (fname) (set-file-mode/errno fname mode)))))
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;;; NO-DECLARE: gcc unistd.h bogusness.
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(define-foreign set-file-uid&gid/errno
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(chown (string path) (uid_t uid) (gid_t gid)) no-declare
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(to-scheme integer errno_or_false))
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(define-foreign set-fdes-uid&gid/errno
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(fchown (integer fd) (uid_t uid) (gid_t gid)) no-declare ; for NT Cygwin
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(to-scheme integer errno_or_false))
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(define-errno-syscall (set-file-owner thing uid)
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(lambda (thing uid)
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(generic-file-op thing
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(lambda (fd) (set-fdes-uid&gid/errno fd uid -1))
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(lambda (fname) (set-file-uid&gid/errno fname uid -1)))))
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(define-errno-syscall (set-file-group thing gid)
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(lambda (thing gid)
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(generic-file-op thing
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(lambda (fd) (set-fdes-uid&gid/errno fd -1 gid))
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(lambda (fname) (set-file-uid&gid/errno fname -1 gid)))))
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;;; Uses real uid and gid, not effective. I don't use this anywhere.
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(define-foreign %file-ruid-access-not?
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(access (string path)
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(integer perms))
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bool)
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;(define (file-access? path perms)
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; (not (%file-access-not? path perms)))
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;
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;(define (file-executable? fname)
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; (file-access? fname 1))
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;
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;(define (file-writable? fname)
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; (file-access? fname 2))
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;
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;(define (file-readable? fname)
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; (file-access? fname 4))
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(define-foreign create-hard-link/errno
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(link (string original-name) (string new-name))
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(to-scheme integer errno_or_false))
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(define-errno-syscall (create-hard-link original-name new-name)
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create-hard-link/errno)
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(define-foreign create-fifo/errno (mkfifo (string path) (mode_t mode))
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no-declare ; integer on SunOS
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(to-scheme integer errno_or_false))
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(define-errno-syscall (create-fifo path mode) create-fifo/errno)
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(define-foreign create-directory/errno
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(mkdir (string path) (mode_t mode)) no-declare ; integer on SunOS.
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(to-scheme integer errno_or_false))
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(define (create-directory path . maybe-mode)
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(let ((mode (:optional maybe-mode #o777))
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(fname (ensure-file-name-is-nondirectory path)))
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(cond ((create-directory/errno fname mode) =>
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(lambda (err)
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(if err (errno-error err create-directory path mode)))))))
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(define-foreign read-symlink/errno (scm_readlink (string path))
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(multi-rep (to-scheme string errno_on_zero_or_false) ; NULL => errno, otw #f
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static-string))
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(define-errno-syscall (read-symlink path) read-symlink/errno
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new-path)
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(define-foreign %rename-file/errno
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(rename (string old-name) (string new-name))
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(to-scheme integer errno_or_false))
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(define-errno-syscall (%rename-file old-name new-name)
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%rename-file/errno)
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(define-foreign delete-directory/errno
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(rmdir (string path))
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(to-scheme integer errno_or_false))
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(define-errno-syscall (delete-directory path) delete-directory/errno)
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(define-foreign %utime/errno (scm_utime (string path)
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(integer ac_hi) (integer ac_lo)
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(integer m_hi) (integer m_lo))
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(to-scheme integer errno_or_false))
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(define-foreign %utime-now/errno (scm_utime_now (string path))
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(to-scheme integer errno_or_false))
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;;; (SET-FILE-TIMES/ERRNO path [access-time mod-time])
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(define (set-file-times/errno path . maybe-times)
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(if (pair? maybe-times)
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(let* ((access-time (real->exact-integer (car maybe-times)))
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(mod-time (if (pair? (cddr maybe-times))
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(error "Too many arguments to set-file-times/errno"
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(cons path maybe-times))
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(real->exact-integer (cadr maybe-times)))))
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(%utime/errno path (hi8 access-time) (lo24 access-time)
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(hi8 mod-time) (lo24 mod-time)))
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(%utime-now/errno path)))
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(define-errno-syscall (set-file-times . args) set-file-times/errno)
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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;;; STAT
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(define-foreign stat-file/errno
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(scheme_stat (string path) (vector-desc data) (bool chase?))
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(to-scheme integer "False_on_zero")) ; errno or #f
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;(define-errno-syscall (stat-file fd data chase?) stat-file/errno)
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(define-foreign stat-fdes/errno
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(scheme_fstat (integer fd) (vector-desc data))
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(to-scheme integer "False_on_zero")) ; errno or #f
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;(define-errno-syscall (stat-fdes fd data) stat-fdes/errno)
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(define-record file-info
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type
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device
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inode
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mode
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nlinks
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uid
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gid
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size
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atime
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mtime
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ctime
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)
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;;; Should be redone to return multiple-values.
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(define (file-info/errno fd/port/fname chase?)
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(let ((ans-vec (make-vector 14))
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(time-hack (lambda (lo-24 hi-8)
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(let ((val (+ (arithmetic-shift hi-8 24) lo-24)))
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(if (zero? (bitwise-and hi-8 #x80)) val
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;; Oops -- it's a negative 32-bit value.
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;; Or in all the sign bits.
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(bitwise-ior (bitwise-not #xffffffff)
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val)))))
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(file-type (lambda (type-code)
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(vector-ref '#(block-special char-special directory fifo
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regular socket symlink)
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type-code))))
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(cond ((generic-file-op fd/port/fname
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(lambda (fd)
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(stat-fdes/errno fd ans-vec))
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(lambda (fname)
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(stat-file/errno fname ans-vec chase?)))
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=> (lambda (err) (values err #f)))
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(else (values #f (make-file-info (file-type (vector-ref ans-vec 0))
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(vector-ref ans-vec 1)
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(vector-ref ans-vec 2)
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(vector-ref ans-vec 3)
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(vector-ref ans-vec 4)
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(vector-ref ans-vec 5)
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(vector-ref ans-vec 6)
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(vector-ref ans-vec 7)
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(time-hack (vector-ref ans-vec 8)
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(vector-ref ans-vec 9))
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(time-hack (vector-ref ans-vec 10)
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(vector-ref ans-vec 11))
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(time-hack (vector-ref ans-vec 12)
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(vector-ref ans-vec 13))))))))
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(define (file-info fd/port/fname . maybe-chase?)
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(let ((chase? (:optional maybe-chase? #t)))
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(receive (err info) (file-info/errno fd/port/fname chase?)
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(if err (errno-error err file-info fd/port/fname chase?)
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info))))
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(define file-attributes
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(deprecated-proc file-info "file-attributes" "Use file-info instead."))
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|
|
;;; "no-declare" as there is no agreement among the OS's as to whether or not
|
|
;;; the OLD-NAME arg is "const". It *should* be const.
|
|
|
|
(define-foreign create-symlink/errno
|
|
(symlink (string old-name) (string new-name)) no-declare
|
|
(to-scheme integer errno_or_false))
|
|
|
|
;(define-errno-syscall (create-symlink old-name new-name)
|
|
; create-symlink/errno)
|
|
|
|
|
|
;;; "no-declare" as there is no agreement among the OS's as to whether or not
|
|
;;; the PATH arg is "const". It *should* be const.
|
|
|
|
(define-foreign truncate-file/errno
|
|
(truncate (string path) (off_t length)) no-declare
|
|
(to-scheme integer errno_or_false))
|
|
|
|
(define-foreign truncate-fdes/errno
|
|
(ftruncate (integer fd) (off_t length)) no-declare ; Indigo bogosity.
|
|
(to-scheme integer errno_or_false))
|
|
|
|
(define-errno-syscall (truncate-file path length)
|
|
(lambda (thing length)
|
|
(generic-file-op thing
|
|
(lambda (fd) (truncate-fdes/errno fd length))
|
|
(lambda (fname) (truncate-file/errno fname length)))))
|
|
|
|
|
|
(define-foreign delete-file/errno
|
|
(unlink (string path))
|
|
(to-scheme integer errno_or_false))
|
|
|
|
(define-errno-syscall (delete-file path) delete-file/errno)
|
|
|
|
|
|
(define-foreign sync-file/errno (fsync (integer fd))
|
|
(to-scheme integer errno_or_false))
|
|
|
|
(define-errno-syscall (sync-file fd/port)
|
|
(lambda (fd/port)
|
|
(if (output-port? fd/port) (force-output fd/port))
|
|
(sleazy-call/fdes fd/port sync-file/errno)))
|
|
|
|
|
|
;;; Amazingly bogus syscall -- doesn't *actually* sync the filesys.
|
|
(define-foreign sync-file-system (sync) no-declare ; Linux sux - says int
|
|
ignore)
|
|
|
|
|
|
;;; I/O
|
|
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
|
|
|
|
(define-foreign %close-fdes/errno (close (integer fd))
|
|
(to-scheme integer "errno_or_false"))
|
|
|
|
(define (%close-fdes fd)
|
|
(let lp ()
|
|
(let ((errno (%close-fdes/errno fd)))
|
|
(cond ((not errno) #t) ; Successful close.
|
|
((= errno errno/badf) #f) ; File descriptor already closed.
|
|
((= errno errno/intr) (lp)) ; Retry.
|
|
(else
|
|
(errno-error errno %close-fdes fd)))))) ; You lose.
|
|
|
|
(define-foreign %dup/errno
|
|
(dup (integer fd))
|
|
(multi-rep (to-scheme integer errno_or_false)
|
|
integer))
|
|
|
|
(define-errno-syscall (%dup fd) %dup/errno
|
|
new-fd)
|
|
|
|
(define-foreign %dup2/errno
|
|
(dup2 (integer fd-from) (integer fd-to))
|
|
(multi-rep (to-scheme integer errno_or_false)
|
|
integer))
|
|
|
|
(define-errno-syscall (%dup2 fd-from fd-to) %dup2/errno
|
|
new-fd)
|
|
|
|
|
|
(define-foreign %fd-seek/errno
|
|
(lseek (integer fd) (off_t offset) (integer whence))
|
|
(multi-rep (to-scheme off_t errno_or_false)
|
|
off_t))
|
|
|
|
|
|
|
|
(define seek/set 0) ;Unix codes for "whence"
|
|
(define seek/delta 1)
|
|
(define seek/end 2)
|
|
|
|
(define (seek fd/port offset . maybe-whence)
|
|
(let ((whence (:optional maybe-whence seek/set)))
|
|
(receive (err cursor)
|
|
((if (integer? fd/port) %fd-seek/errno %fdport-seek/errno)
|
|
fd/port
|
|
offset
|
|
whence)
|
|
(if err (errno-error err seek fd/port offset whence) cursor))))
|
|
|
|
(define (tell fd/port)
|
|
(receive (err offset) (if (integer? fd/port)
|
|
(%fd-seek/errno fd/port 0 seek/delta) ; seek(fd)
|
|
(%fdport-tell/errno fd/port)) ; ftell(f)
|
|
(if err (errno-error err tell fd/port) offset)))
|
|
|
|
|
|
(define-foreign %char-ready-fdes?/errno
|
|
(char_ready_fdes (integer fd))
|
|
desc) ; errno, #t, or #f
|
|
|
|
(define (%char-ready-fdes? fd)
|
|
(let ((retval (%char-ready-fdes?/errno fd)))
|
|
(if (integer? retval) (errno-error retval %char-ready-fdes? fd)
|
|
retval)))
|
|
|
|
|
|
(define-foreign %open/errno
|
|
(open (string path)
|
|
(integer flags)
|
|
(mode_t mode)) ; integer on SunOS
|
|
no-declare ; NOTE
|
|
(multi-rep (to-scheme integer errno_or_false)
|
|
integer))
|
|
|
|
(define-errno-syscall (%open path flags mode) %open/errno
|
|
fd)
|
|
|
|
(define (open-fdes path flags . maybe-mode) ; mode defaults to 0666
|
|
(%open path flags (:optional maybe-mode #o666)))
|
|
|
|
|
|
(define-foreign pipe-fdes/errno (scheme_pipe)
|
|
(to-scheme integer "False_on_zero") ; Win: #f, lose: errno
|
|
integer ; r
|
|
integer) ; w
|
|
|
|
(define-errno-syscall (pipe-fdes) pipe-fdes/errno
|
|
r w)
|
|
|
|
(define (pipe)
|
|
(receive (r-fd w-fd) (pipe-fdes)
|
|
(let ((r (fdes->inport r-fd))
|
|
(w (fdes->outport w-fd)))
|
|
(release-port-handle r)
|
|
(release-port-handle w)
|
|
(values r w))))
|
|
|
|
(define-foreign %read-fdes-char
|
|
(read_fdes_char (integer fd))
|
|
desc) ; Char or errno or #f (eof).
|
|
|
|
(define (read-fdes-char fd)
|
|
(let ((c (%read-fdes-char fd)))
|
|
(if (integer? c) (errno-error c read-fdes-char fd) c)))
|
|
|
|
|
|
(define-foreign write-fdes-char/errno (write_fdes_char (char char) (integer fd))
|
|
(to-scheme integer errno_or_false))
|
|
|
|
(define-errno-syscall (write-fdes-char char fd) write-fdes-char/errno)
|
|
|
|
|
|
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
|
|
;;; Read and write
|
|
|
|
(define-foreign read-fdes-substring!/errno
|
|
(read_fdes_substring (string-desc buf)
|
|
(integer start)
|
|
(integer end)
|
|
(integer fd))
|
|
(multi-rep (to-scheme integer errno_or_false)
|
|
integer))
|
|
|
|
(define-foreign write-fdes-substring/errno
|
|
(write_fdes_substring (string-desc buf)
|
|
(integer start)
|
|
(integer end)
|
|
(integer fd))
|
|
(multi-rep (to-scheme integer errno_or_false)
|
|
integer))
|
|
|
|
|
|
;;; Signals (rather incomplete)
|
|
;;; ---------------------------
|
|
|
|
(define-foreign signal-pid/errno
|
|
(kill (pid_t pid) (integer signal))
|
|
(to-scheme integer errno_or_false))
|
|
|
|
(define-errno-syscall (signal-pid pid signal) signal-pid/errno)
|
|
|
|
(define (signal-process proc signal)
|
|
(signal-pid (cond ((proc? proc) (proc:pid proc))
|
|
((integer? proc) proc)
|
|
(else (error "Illegal proc passed to signal-process" proc)))
|
|
signal))
|
|
|
|
(define (signal-process-group proc-group signal)
|
|
(signal-pid (- (cond ((proc? proc-group) (proc:pid proc-group))
|
|
((integer? proc-group) proc-group)
|
|
(else (error "Illegal proc passed to signal-process-group"
|
|
proc-group))))
|
|
signal))
|
|
|
|
;;; SunOS, not POSIX:
|
|
;;; (define-foreign signal-process-group/errno
|
|
;;; (killpg (integer proc-group) (integer signal))
|
|
;;; (to-scheme integer errno_or_false))
|
|
;;;
|
|
;;; (define-errno-syscall (signal-process-group proc-group signal)
|
|
;;; signal-process-group/errno)
|
|
|
|
(define-foreign pause-until-interrupt (pause) no-declare ignore)
|
|
|
|
(define-foreign itimer (alarm (uint_t secs)) uint_t)
|
|
|
|
;;; User info
|
|
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
|
|
|
|
(define-record user-info
|
|
name uid gid home-dir shell
|
|
|
|
;; Make user-info records print like #{user-info shivers}.
|
|
((disclose ui)
|
|
(list "user-info" (user-info:name ui))))
|
|
|
|
(define-foreign %uid->user-info (user_info_uid (uid_t uid))
|
|
bool ; win?
|
|
static-string ; name
|
|
gid_t ; gid
|
|
static-string ; home-dir
|
|
static-string); shell
|
|
|
|
(define-foreign %name->user-info (user_info_name (string name))
|
|
bool ; win?
|
|
uid_t ; uid
|
|
gid_t ; gid
|
|
static-string ; home-dir
|
|
static-string); shell
|
|
|
|
(define (uid->user-info uid)
|
|
(receive (win? name gid home-dir shell)
|
|
(%uid->user-info uid)
|
|
(if win? (make-user-info name uid gid home-dir shell)
|
|
(error "Cannot get user's information" uid->user-info uid))))
|
|
|
|
(define (name->user-info name)
|
|
(receive (win? uid gid home-dir shell)
|
|
(%name->user-info name)
|
|
(if win? (make-user-info name uid gid home-dir shell)
|
|
(error "Cannot get user's information" name->user-info name))))
|
|
|
|
(define (user-info uid/name)
|
|
((cond ((string? uid/name) name->user-info)
|
|
((integer? uid/name) uid->user-info)
|
|
(else (error "user-info arg must be string or integer" uid/name)))
|
|
uid/name))
|
|
|
|
;;; Derived functions
|
|
|
|
(define (->uid uid/name)
|
|
(user-info:uid (user-info uid/name)))
|
|
|
|
(define (->username uid/name)
|
|
(user-info:name (user-info uid/name)))
|
|
|
|
(define (%homedir uid/name)
|
|
(user-info:home-dir (user-info uid/name)))
|
|
|
|
|
|
;;; Group info
|
|
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
|
|
|
|
(define-record group-info
|
|
name gid members
|
|
|
|
;; Make group-info records print like #{group-info wheel}.
|
|
((disclose gi) (list "group-info" (group-info:name gi))))
|
|
|
|
;;; These guys return static structs, so they aren't reentrant.
|
|
;;; Must be fixed for threaded version.
|
|
|
|
(define-foreign %gid->group-info
|
|
(group_info_gid (integer gid))
|
|
bool ; win?
|
|
static-string ; name
|
|
(C char**) ; members
|
|
integer) ; num members
|
|
|
|
(define-foreign %name->group-info
|
|
(group_info_name (string name))
|
|
bool ; win?
|
|
integer ; gid
|
|
(C char**) ; members
|
|
integer) ; num members
|
|
|
|
(define (gid->group-info gid)
|
|
(receive (win? name members nmembers)
|
|
(%gid->group-info gid)
|
|
(if win?
|
|
(make-group-info name gid
|
|
(vector->list (C-string-vec->Scheme members nmembers)))
|
|
(error "Cannot get group's information for gid" gid))))
|
|
|
|
(define (name->group-info name)
|
|
(receive (win? gid members nmembers)
|
|
(%name->group-info name)
|
|
(if win?
|
|
(make-group-info name gid
|
|
(vector->list (C-string-vec->Scheme members nmembers)))
|
|
(error "Cannot get group's information for name" name))))
|
|
|
|
(define (group-info gid/name)
|
|
((cond ((string? gid/name) name->group-info)
|
|
((integer? gid/name) gid->group-info)
|
|
(else (error "group-info arg must be string or integer" gid/name)))
|
|
gid/name))
|
|
|
|
;;; Derived functions
|
|
|
|
(define (->gid name)
|
|
(group-info:gid (group-info name)))
|
|
|
|
(define (->groupname gid)
|
|
(group-info:name (group-info gid)))
|
|
|
|
;;; Directory stuff
|
|
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
|
|
|
|
(define-foreign %open-dir (open_dir (string dir-name))
|
|
(to-scheme integer "False_on_zero") ; Win: #f, lose: errno
|
|
(C char**) ; Vector of strings
|
|
integer) ; Length of strings
|
|
|
|
;;; Takes a null-terminated C vector of strings -- filenames.
|
|
;;; Sorts them in place by the Unix filename order: ., .., dotfiles, others.
|
|
|
|
(define-foreign %sort-file-vector
|
|
(scm_sort_filevec ((C "const char** ~a") cvec)
|
|
(integer veclen))
|
|
ignore)
|
|
|
|
(define (directory-files . args)
|
|
(let-optionals args ((dir ".")
|
|
(dotfiles? #f))
|
|
(check-arg string? dir directory-files)
|
|
(receive (err cvec numfiles)
|
|
(%open-dir (ensure-file-name-is-nondirectory dir))
|
|
(if err (errno-error err directory-files dir dotfiles?))
|
|
(%sort-file-vector cvec numfiles)
|
|
(let ((files (vector->list (C-string-vec->Scheme&free cvec numfiles))))
|
|
(if dotfiles? files
|
|
(filter (lambda (f) (not (char=? (string-ref f 0) #\.)))
|
|
files))))))
|
|
|
|
;;; I do this one in C, I'm not sure why:
|
|
;;; It is used by MATCH-FILES.
|
|
|
|
;;; 99/7: No one is using this function, so I'm commenting it out.
|
|
;;; Later, we could tune up the globber or regexp file-matcher to use
|
|
;;; it (but should shift it into the rx directory). But I should also go
|
|
;;; to a file-at-a-time cursor model for directory fetching. -Olin
|
|
|
|
;(define-foreign %filter-C-strings!
|
|
; (filter_stringvec (string-desc pattern) ((C "char const ** ~a") cvec))
|
|
; integer) ; number of files that pass the filter.
|
|
|
|
;(define (match-files regexp . maybe-dir)
|
|
; (let ((dir (:optional maybe-dir ".")))
|
|
; (check-arg string? dir match-files)
|
|
; (receive (err cvec numfiles)
|
|
; (%open-dir (ensure-file-name-is-nondirectory dir))
|
|
; (if err (errno-error err match-files regexp dir))
|
|
; (receive (numfiles) (%filter-C-strings! regexp cvec)
|
|
; ;(if err (error err match-files))
|
|
; (%sort-file-vector cvec numfiles)
|
|
; (let ((files (C-string-vec->Scheme&free cvec numfiles)))
|
|
; (vector->list files))))))
|
|
|
|
|
|
;;; Environment manipulation
|
|
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
|
|
|
|
;;; (var . val) / "var=val" rep conversion:
|
|
|
|
(define (split-env-string var=val)
|
|
(let ((i (string-index var=val #\=)))
|
|
(if i (values (substring var=val 0 i)
|
|
(substring var=val (+ i 1) (string-length var=val)))
|
|
(error "No \"=\" in environment string" var=val))))
|
|
|
|
(define (env-list->alist env-list)
|
|
(map (lambda (var=val)
|
|
(call-with-values (lambda () (split-env-string var=val))
|
|
cons))
|
|
env-list))
|
|
|
|
(define (alist->env-vec alist)
|
|
(list->vector (map (lambda (var.val)
|
|
(string-append (car var.val) "="
|
|
(let ((val (cdr var.val)))
|
|
(if (string? val) val
|
|
(string-join val ":")))))
|
|
alist)))
|
|
|
|
;;; ENV->ALIST
|
|
|
|
(define-foreign %load-env (scm_envvec)
|
|
(C char**) ; char **environ
|
|
fixnum) ; & its length.
|
|
|
|
(define (env->list)
|
|
(receive (C-env nelts) (%load-env)
|
|
(vector->list (C-string-vec->Scheme C-env nelts))))
|
|
|
|
(define (env->alist) (env-list->alist (env->list)))
|
|
|
|
;;; ALIST->ENV
|
|
|
|
(define-foreign %install-env/errno
|
|
(install_env (vector-desc env-vec))
|
|
(to-scheme integer errno_or_false))
|
|
|
|
(define-errno-syscall (%install-env env-vec) %install-env/errno)
|
|
|
|
(define (alist->env alist)
|
|
(%install-env (alist->env-vec alist)))
|
|
|
|
;;; GETENV, PUTENV, SETENV
|
|
|
|
(define-foreign getenv (getenv (string var))
|
|
static-string)
|
|
|
|
(foreign-source
|
|
"#define errno_on_nonzero_or_false(x) ((x) ? ENTER_FIXNUM(errno) : SCHFALSE)"
|
|
"" "")
|
|
|
|
;(define-foreign putenv/errno
|
|
; (put_env (string var=val))
|
|
; desc) ; #f or errno
|
|
|
|
|
|
;;; putenv takes a constant: const char *, cig can't figure that out..
|
|
(define-foreign putenv/errno
|
|
(putenv (string-copy var=val)) no-declare
|
|
(to-scheme integer errno_on_nonzero_or_false)) ; #f or errno
|
|
|
|
(define-foreign delete-env (delete_env (string var))
|
|
ignore)
|
|
|
|
(define (putenv var=val)
|
|
(if (putenv/errno var=val)
|
|
(error "malloc failure in putenv" var=val)))
|
|
|
|
(define (setenv var val)
|
|
(if val
|
|
(putenv (string-append var "=" val))
|
|
(delete-env var)))
|
|
|
|
|
|
;;; Fd-ports
|
|
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
|
|
|
|
(define-foreign close-fdport*/errno (close_fdport (desc data))
|
|
(to-scheme integer "False_on_zero")) ; Win: #f, lose: errno
|
|
|
|
(define (close-fdport* data)
|
|
(let lp ()
|
|
(let ((errno (close-fdport*/errno data)))
|
|
(cond ((not errno) #t) ; Successful close.
|
|
((= errno errno/badf) #f) ; File descriptor already closed.
|
|
((= errno errno/intr) (lp)) ; Retry.
|
|
(else
|
|
(errno-error errno close-fdport* data)))))) ; You lose.
|
|
|
|
|
|
|
|
(define-foreign %fdport*-read-char/errno (fdport_getchar (desc data))
|
|
desc) ; char, errno, or #f for end-of-file.
|
|
|
|
(define (%fdport*-read-char data)
|
|
(let ((c (%fdport*-read-char/errno data)))
|
|
(if (integer? c)
|
|
(if (= c errno/intr)
|
|
(%fdport*-read-char data) ; Retry
|
|
(errno-error c %fdport*-read-char data)) ; Lose
|
|
(or c eof-object)))) ; Win
|
|
|
|
|
|
(define-foreign %fdport*-char-ready?/errno
|
|
(fdport_char_readyp (desc data))
|
|
desc)
|
|
|
|
(define (%fdport*-char-ready? data)
|
|
(let ((val (%fdport*-char-ready?/errno data)))
|
|
(if (integer? val) (errno-error val %fdport*-char-ready? data)
|
|
val)))
|
|
|
|
(define-foreign %fdport*-write-char/errno
|
|
(fdport_putchar (desc data) (char c))
|
|
(to-scheme integer "False_on_zero")) ; Win: #f, lose: errno
|
|
|
|
(define-errno-syscall (%fdport*-write-char desc c)
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|
%fdport*-write-char/errno)
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|
|
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(define-foreign flush-fdport*/errno (flush_fdport (desc data))
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|
(to-scheme integer "False_on_zero")) ; Win: #f, lose: errno
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|
|
|
;;; FLUSH-FDPORT* isn't defined with DEFINE-ERRNO-SYSCALL because that would
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|
;;; return 0 values, which blows up S48's extended-port machinery. This
|
|
;;; version returns #f.
|
|
;;; ???
|
|
|
|
(define (flush-fdport* data)
|
|
(cond ((flush-fdport*/errno data) =>
|
|
(lambda (err) (if (= err errno/intr)
|
|
(flush-fdport* data)
|
|
(errno-error err flush-fdport* data))))
|
|
(else #f)))
|
|
|
|
(define-foreign flush-all-ports/errno (flush_all_ports)
|
|
(to-scheme integer errno_or_false))
|
|
|
|
(define-errno-syscall (flush-all-ports)
|
|
flush-all-ports/errno)
|
|
|
|
(define-foreign %fdport*-seek/errno
|
|
(seek_fdport (desc data) (off_t offset) (integer whence))
|
|
(to-scheme integer "False_on_zero") ; errno
|
|
integer) ; new position
|
|
|
|
(define-foreign %fdport*-tell/errno
|
|
(tell_fdport (desc data))
|
|
(to-scheme integer "False_on_zero") ; errno
|
|
integer)
|
|
|
|
(define-foreign %fdport*-set-buffering/errno
|
|
(set_fdbuf (desc data) (integer policy) (integer size))
|
|
(to-scheme integer "False_on_zero")) ; errno
|
|
|
|
(define-foreign %set-cloexec (set_cloexec (integer fd) (bool val))
|
|
(to-scheme integer "errno_or_false"))
|
|
|
|
(define-foreign %init-fdports! (init_fdports) ignore)
|
|
|
|
(define-foreign %install-port/errno
|
|
(install_port (integer fd) (desc port) (integer revealed))
|
|
(to-scheme integer "False_on_zero")) ; Win: #f, lose: errno
|
|
|
|
(define-errno-syscall (%install-port fd port revealed) %install-port/errno)
|
|
|
|
|
|
(define-foreign %maybe-fdes->port (maybe_fdes2port (integer fd))
|
|
desc) ; fd or #f
|
|
|
|
|
|
;;; Doesn't signal on error. Clients must check return value.
|
|
|
|
(define-foreign %move-fdport
|
|
(move_fdport (integer fd) (desc port) (integer new-revealed-count))
|
|
bool) ; Win: #f, lose: #t
|
|
|
|
|
|
(define-foreign read-fdport*-substring!/errno
|
|
(read_fdport_substring (string-desc buf)
|
|
(integer start)
|
|
(integer end)
|
|
(desc data))
|
|
(multi-rep (to-scheme integer errno_or_false)
|
|
integer))
|
|
|
|
(define-foreign write-fdport*-substring/errno
|
|
(write_fdport_substring (string-desc buf)
|
|
(integer start)
|
|
(integer end)
|
|
(desc fdport))
|
|
(multi-rep (to-scheme integer errno_or_false)
|
|
integer))
|
|
|
|
|
|
;;; Some of fcntl()
|
|
;;;;;;;;;;;;;;;;;;;
|
|
|
|
(define-foreign %fcntl-read/errno (fcntl_read (fixnum fd) (fixnum command))
|
|
(multi-rep (to-scheme integer errno_or_false)
|
|
integer))
|
|
|
|
(define-foreign %fcntl-write/errno
|
|
(fcntl_write (fixnum fd) (fixnum command) (fixnum val))
|
|
(to-scheme integer errno_or_false))
|
|
|
|
(define-errno-syscall (%fcntl-read fd command) %fcntl-read/errno value)
|
|
(define-errno-syscall (%fcntl-write fd command val) %fcntl-write/errno)
|
|
|
|
;;; fcntl()'s F_GETFD and F_SETFD. Note that the SLEAZY- prefix on the
|
|
;;; CALL/FDES isn't an optimisation; it's *required* for the correct behaviour
|
|
;;; of these procedures. Straight CALL/FDES modifies unrevealed file
|
|
;;; descriptors by clearing their CLOEXEC bit when it reveals them -- so it
|
|
;;; would interfere with the reading and writing of that bit!
|
|
|
|
(define (fdes-flags fd/port)
|
|
(sleazy-call/fdes fd/port
|
|
(lambda (fd) (%fcntl-read fd fcntl/get-fdes-flags))))
|
|
|
|
(define (set-fdes-flags fd/port flags)
|
|
(sleazy-call/fdes fd/port
|
|
(lambda (fd) (%fcntl-write fd fcntl/set-fdes-flags flags))))
|
|
|
|
;;; fcntl()'s F_GETFL and F_SETFL.
|
|
;;; Get: Returns open flags + get-status flags (below)
|
|
;;; Set: append, sync, async, nbio, nonblocking, no-delay
|
|
|
|
(define (fdes-status fd/port)
|
|
(sleazy-call/fdes fd/port
|
|
(lambda (fd) (%fcntl-read fd fcntl/get-status-flags))))
|
|
|
|
(define (set-fdes-status fd/port flags)
|
|
(sleazy-call/fdes fd/port
|
|
(lambda (fd) (%fcntl-write fd fcntl/set-status-flags flags))))
|
|
|
|
;;; Miscellaneous
|
|
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
|
|
|
|
;;; usleep(3): Try to sleep for USECS microseconds.
|
|
;;; sleep(3): Try to sleep for SECS seconds.
|
|
|
|
; De-released -- not POSIX and not on SGI systems.
|
|
; (define-foreign usleep (usleep (integer usecs)) integer)
|
|
|
|
(define (sleep secs) (sleep-until (+ secs (time))))
|
|
|
|
(define (sleep-until when)
|
|
(let* ((when (floor when)) ; Painful to do real->int in Scheme.
|
|
(when (if (exact? when) when (inexact->exact when)))
|
|
(h (hi8 when)) (l (lo24 when)))
|
|
(let lp ()
|
|
(or (%sleep-until h l) (lp)))))
|
|
|
|
(define-foreign %sleep-until (sleep_until (fixnum hi)
|
|
(fixnum lo))
|
|
desc)
|
|
|
|
(define-foreign %gethostname (scm_gethostname)
|
|
static-string)
|
|
|
|
(define system-name %gethostname)
|
|
|
|
(define-foreign errno-msg (errno_msg (integer i))
|
|
static-string)
|