Newer
Older
;;; -*- Package: UNIX -*-
;;;
;;; **********************************************************************
;;; This code was written as part of the CMU Common Lisp project at
;;; Carnegie Mellon University, and has been placed in the public domain.
;;;
(ext:file-comment
"$Header: /Volumes/share2/src/cmucl/cvs2git/cvsroot/src/code/unix.lisp,v 1.40 1996/07/25 14:59:48 ram Exp $")
;;;
;;; **********************************************************************
;;;
;;; This file contains the UNIX low-level support.
;;;
(in-package "UNIX")
(use-package "ALIEN")
(use-package "C-CALL")
(use-package "SYSTEM")
(use-package "EXT")
(export '(
daddr-t caddr-t ino-t swblk-t size-t time-t dev-t off-t uid-t gid-t
timeval tv-sec tv-usec timezone tz-minuteswest tz-dsttime
itimerval it-interval it-value tchars t-intrc t-quitc t-startc
t-stopc t-eofc t-brkc ltchars t-suspc t-dsuspc t-rprntc t-flushc
t-werasc t-lnextc sgttyb sg-ispeed sg-ospeed sg-erase sg-kill
sg-flags winsize ws-row ws-col ws-xpixel ws-ypixel
direct d-off d-ino d-reclen #-svr4 d-namlen d-name
stat st-dev st-mode st-nlink st-uid st-gid st-rdev st-size
st-atime st-mtime st-ctime st-blksize st-blocks
s-ifmt s-ifdir s-ifchr s-ifblk s-ifreg s-iflnk s-ifsock
s-isuid s-isgid s-isvtx s-iread s-iwrite s-iexec
ruseage ru-utime ru-stime ru-maxrss ru-ixrss ru-idrss
ru-isrss ru-minflt ru-majflt ru-nswap ru-inblock ru-oublock
ru-msgsnd ru-msgrcv ru-nsignals ru-nvcsw ru-nivcsw
unix-errno get-unix-error-msg
unix-pathname unix-file-mode unix-fd unix-pid unix-uid unix-gid
unix-access r_ok w_ok x_ok f_ok unix-chdir unix-chmod setuidexec
setgidexec savetext readown writeown execown readgrp writegrp
execgrp readoth writeoth execoth unix-fchmod unix-chown unix-fchown
unix-getdtablesize unix-close unix-creat unix-dup unix-dup2
unix-fcntl f-dupfd f-getfd f-setfd f-getfl f-setfl f-getown f-setown
fndelay fappend fasync fcreat ftrunc fexcl unix-link unix-lseek
l_set l_incr l_xtnd unix-mkdir unix-open o_rdonly o_wronly o_rdwr
o_append o_creat o_trunc o_excl unix-pipe unix-read unix-readlink
unix-rename unix-rmdir unix-fast-select fd-setsize fd-set fd-clr
fd-isset fd-zero unix-select unix-sync unix-fsync unix-truncate
tcsetpgrp tcgetpgrp tty-process-group
terminal-speeds tty-raw tty-crmod tty-echo tty-lcase
#-(or hpux svr4) tty-cbreak #-(or hpux svr4) tty-tandem
#+(or hpux svr4) termios #+(or hpux svr4) c-lflag
#+(or hpux svr4) c-iflag #+(or hpux svr4) c-oflag
#+(or hpux svr4) tty-icrnl #+(or hpux svr4) tty-ocrnl
#+(or hpux svr4) vdsusp #+(or hpux svr4) veof
#+(or hpux svr4) vintr #+(or hpux svr4) vquit #+(or hpux svr4) vstart
#+(or hpux svr4) vstop #+(or hpux svr4) vsusp
#+(or hpux svr4) c-cflag
#+(or hpux svr4) c-cc #+(or hpux svr4) tty-icanon
#+(or hpux svr4) vmin #+(or hpux svr4) vtime
#+(or hpux svr4) tty-ixon
#+(or hpux svr4) tcsaflush #+(or hpux svr4)
unix-tcgetattr #+(or hpux svr4) unix-tcsetattr
TIOCGETP TIOCSETP TIOCFLUSH TIOCSETC TIOCGETC TIOCSLTC
KBDSCLICK FIONREAD #+hpux siocspgrp
unix-exit unix-stat unix-lstat unix-fstat
unix-getrusage unix-fast-getrusage rusage_self rusage_children
unix-gettimeofday
#-hpux unix-utimes #-(or svr4 hpux) unix-setreuid
#-(or svr4 hpux) unix-setregid
unix-getpid unix-getppid
unix-getgid unix-getegid unix-getpgrp unix-setpgrp unix-getuid
unix-getpagesize unix-gethostname unix-gethostid unix-fork
unix-current-directory unix-isatty unix-ttyname unix-execve
unix-socket unix-connect unix-bind unix-listen unix-accept
unix-recv unix-send))
(pushnew :unix *features*)
;;;; Common machine independent structures.
;;; From sys/types.h
(def-alien-type ino-t #-alpha unsigned-long #+alpha unsigned-int)
(def-alien-type size-t #-alpha long #+alpha unsigned-long)
(def-alien-type time-t #-alpha unsigned-long #+alpha unsigned-int)
(def-alien-type dev-t #-(or alpha svr4) short #+alpha int #+svr4 unsigned-long)
(def-alien-type off-t #-alpha long #+alpha unsigned-long)
(def-alien-type uid-t #-(or alpha svr4) unsigned-short #+alpha unsigned-int
#+svr4 long)
(def-alien-type gid-t #-(or alpha svr4) unsigned-short #+alpha unsigned-int
#+svr4 long)
(def-alien-type mode-t #-(or alpha svr4) unsigned-short
(def-alien-type nlink-t #-svr4 unsigned-short #+svr4 unsigned-long)
(defconstant FD-SETSIZE #-(or hpux alpha) 256 #+hpux 2048 #+alpha 4096)
(fds-bits (array #-alpha unsigned-long #+alpha int #.(/ fd-setsize 32)))))
(setf (deref (slot ,fd-set 'fds-bits) ,word)
(logior (truly-the (unsigned-byte 32) (ash 1 ,bit))
(deref (slot ,fd-set 'fds-bits) ,word))))))
(setf (deref (slot ,fd-set 'fds-bits) ,word)
(logand (deref (slot ,fd-set 'fds-bits) ,word)
(32bit-logical-not
(truly-the (unsigned-byte 32) (ash 1 ,bit))))))))
(defmacro fd-isset (offset fd-set)
(let ((word (gensym))
(bit (gensym)))
`(multiple-value-bind (,word ,bit) (floor ,offset 32)
(logbitp ,bit (deref (slot ,fd-set 'fds-bits) ,word)))))
(defmacro fd-zero (fd-set)
`(progn
,@(loop for index upfrom 0 below (/ fd-setsize 32)
collect `(setf (deref (slot ,fd-set 'fds-bits) ,index) 0))))
;;; From sys/time.h
(def-alien-type nil
(struct timeval
(tv-sec time-t) ; seconds
(tv-usec time-t))) ; and microseconds
(def-alien-type nil
(struct timezone
(tz-minuteswest int) ; minutes west of Greenwich
(tz-dsttime ; type of dst correction
(enum nil :none :usa :aust :wet :met :eet :can))))
(def-alien-type nil
(struct itimerval
(it-interval (struct timeval)) ; timer interval
(it-value (struct timeval)))) ; current value
#+svr4
; High-res time. Actually posix definition under svr4 name.
(def-alien-type nil
(struct timestruc-t
(tv-sec time-t)
(tv-nsec long)))
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
;;; From ioctl.h
(def-alien-type nil
(struct tchars
(t-intrc char) ; interrupt
(t-quitc char) ; quit
(t-startc char) ; start output
(t-stopc char) ; stop output
(t-eofc char) ; end-of-file
(t-brkc char))) ; input delimiter (like nl)
(def-alien-type nil
(struct ltchars
(t-suspc char) ; stop process signal
(t-dsuspc char) ; delayed stop process signal
(t-rprntc char) ; reprint line
(t-flushc char) ; flush output (toggles)
(t-werasc char) ; word erase
(t-lnextc char))) ; literal next character
(def-alien-type nil
(struct sgttyb
(sg-ispeed char) ; input speed.
(sg-ospeed char) ; output speed
(sg-erase char) ; erase character
(sg-kill char) ; kill character
(def-alien-type nil
(struct termios
(c-iflag unsigned-int)
(c-oflag unsigned-int)
(c-cflag unsigned-int)
(c-lflag unsigned-int)
(c-cc (array unsigned-char #+hpux 16 #+solaris 19 #+irix 23))))
;;; From sys/dir.h
(def-alien-type nil
(struct direct
#+(and sunos (not svr4)) (d-off long) ; offset of next disk directory entry
#-svr4
(d-namlen unsigned-short) ; length of string in d-name
(d-name (array char 256)))) ; name must be no longer than this
;;; From sys/stat.h
(def-alien-type nil
(struct stat
(st-dev dev-t)
(st-ino ino-t)
(st-uid uid-t)
(st-gid gid-t)
(st-rdev dev-t)
(st-size off-t)
(st-atime time-t)
(st-spare1 int)
(st-mtime time-t)
(st-spare2 int)
(st-ctime time-t)
(st-spare3 int)
(st-blksize #-alpha long #+alpha unsigned-int)
(st-blocks #-alpha long #+alpha int)
(def-alien-type nil
(struct stat
(st-dev dev-t)
(st-pad1 (array long 3))
(st-ino ino-t)
(st-mode unsigned-long)
(st-nlink short)
(st-uid uid-t)
(st-gid gid-t)
(st-rdev dev-t)
(st-pad2 (array long 2))
(st-size off-t)
(st-pad3 long)
(st-atime (struct timestruc-t))
(st-mtime (struct timestruc-t))
(st-ctime (struct timestruc-t))
(st-blksize long)
(st-blocks long)
(st-fstype (array char 16))
(st-pad4 (array long 8))))
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
(defconstant s-ifmt #o0170000)
(defconstant s-ifdir #o0040000)
(defconstant s-ifchr #o0020000)
(defconstant s-ifblk #o0060000)
(defconstant s-ifreg #o0100000)
(defconstant s-iflnk #o0120000)
(defconstant s-ifsock #o0140000)
(defconstant s-isuid #o0004000)
(defconstant s-isgid #o0002000)
(defconstant s-isvtx #o0001000)
(defconstant s-iread #o0000400)
(defconstant s-iwrite #o0000200)
(defconstant s-iexec #o0000100)
;;; From sys/resource.h
(def-alien-type nil
(struct rusage
(ru-utime (struct timeval)) ; user time used
(ru-stime (struct timeval)) ; system time used.
(ru-maxrss long)
(ru-ixrss long) ; integral sharded memory size
(ru-idrss long) ; integral unsharded data "
(ru-isrss long) ; integral unsharded stack "
(ru-minflt long) ; page reclaims
(ru-majflt long) ; page faults
(ru-nswap long) ; swaps
(ru-inblock long) ; block input operations
(ru-oublock long) ; block output operations
(ru-msgsnd long) ; messages sent
(ru-msgrcv long) ; messages received
(ru-nsignals long) ; signals received
(ru-nvcsw long) ; voluntary context switches
(ru-nivcsw long))) ; involuntary "
(def-alien-type nil
(struct rlimit
(rlim-cur #-alpha int #+alpha unsigned-int) ; current (soft) limit
(rlim-max #-alpha int #+alpha unsigned-int))); maximum value for rlim-cur
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
;;;; Errno stuff.
(eval-when (compile eval)
(defparameter *compiler-unix-errors* nil)
(defmacro def-unix-error (name number description)
`(progn
(eval-when (compile eval)
(push (cons ,number ,description) *compiler-unix-errors*))
(defconstant ,name ,number ,description)
(export ',name)))
(defmacro emit-unix-errors ()
(let* ((max (apply #'max (mapcar #'car *compiler-unix-errors*)))
(array (make-array (1+ max) :initial-element nil)))
(dolist (error *compiler-unix-errors*)
(setf (svref array (car error)) (cdr error)))
`(progn
(defvar *unix-errors* ',array)
(proclaim '(simple-vector *unix-errors*)))))
) ;eval-when
;;;
;;; From <errno.h>
;;;
(def-unix-error ESUCCESS 0 "Successful")
(def-unix-error EPERM 1 "Not owner")
(def-unix-error ENOENT 2 "No such file or directory")
(def-unix-error ESRCH 3 "No such process")
(def-unix-error EINTR 4 "Interrupted system call")
(def-unix-error EIO 5 "I/O error")
(def-unix-error ENXIO 6 "No such device or address")
(def-unix-error E2BIG 7 "Arg list too long")
(def-unix-error ENOEXEC 8 "Exec format error")
(def-unix-error EBADF 9 "Bad file number")
(def-unix-error ECHILD 10 "No children")
(def-unix-error EAGAIN 11 "No more processes")
(def-unix-error ENOMEM 12 "Not enough core")
(def-unix-error EACCES 13 "Permission denied")
(def-unix-error EFAULT 14 "Bad address")
(def-unix-error ENOTBLK 15 "Block device required")
(def-unix-error EBUSY 16 "Mount device busy")
(def-unix-error EEXIST 17 "File exists")
(def-unix-error EXDEV 18 "Cross-device link")
(def-unix-error ENODEV 19 "No such device")
(def-unix-error ENOTDIR 20 "Not a director")
(def-unix-error EISDIR 21 "Is a directory")
(def-unix-error EINVAL 22 "Invalid argument")
(def-unix-error ENFILE 23 "File table overflow")
(def-unix-error EMFILE 24 "Too many open files")
(def-unix-error ENOTTY 25 "Not a typewriter")
(def-unix-error ETXTBSY 26 "Text file busy")
(def-unix-error EFBIG 27 "File too large")
(def-unix-error ENOSPC 28 "No space left on device")
(def-unix-error ESPIPE 29 "Illegal seek")
(def-unix-error EROFS 30 "Read-only file system")
(def-unix-error EMLINK 31 "Too many links")
(def-unix-error EPIPE 32 "Broken pipe")
;;;
;;; Math
(def-unix-error EDOM 33 "Argument too large")
(def-unix-error ERANGE 34 "Result too large")
;;;
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
;;; non-blocking and interrupt i/o
(def-unix-error EWOULDBLOCK 35 "Operation would block")
(def-unix-error EDEADLK 35 "Operation would block") ; Ditto
(def-unix-error EINPROGRESS 36 "Operation now in progress")
(def-unix-error EALREADY 37 "Operation already in progress")
;;;
;;; ipc/network software
(def-unix-error ENOTSOCK 38 "Socket operation on non-socket")
(def-unix-error EDESTADDRREQ 39 "Destination address required")
(def-unix-error EMSGSIZE 40 "Message too long")
(def-unix-error EPROTOTYPE 41 "Protocol wrong type for socket")
(def-unix-error ENOPROTOOPT 42 "Protocol not available")
(def-unix-error EPROTONOSUPPORT 43 "Protocol not supported")
(def-unix-error ESOCKTNOSUPPORT 44 "Socket type not supported")
(def-unix-error EOPNOTSUPP 45 "Operation not supported on socket")
(def-unix-error EPFNOSUPPORT 46 "Protocol family not supported")
(def-unix-error EAFNOSUPPORT 47 "Address family not supported by protocol family")
(def-unix-error EADDRINUSE 48 "Address already in use")
(def-unix-error EADDRNOTAVAIL 49 "Can't assign requested address")
;;;
;;; operational errors
(def-unix-error ENETDOWN 50 "Network is down")
(def-unix-error ENETUNREACH 51 "Network is unreachable")
(def-unix-error ENETRESET 52 "Network dropped connection on reset")
(def-unix-error ECONNABORTED 53 "Software caused connection abort")
(def-unix-error ECONNRESET 54 "Connection reset by peer")
(def-unix-error ENOBUFS 55 "No buffer space available")
(def-unix-error EISCONN 56 "Socket is already connected")
(def-unix-error ENOTCONN 57 "Socket is not connected")
(def-unix-error ESHUTDOWN 58 "Can't send after socket shutdown")
(def-unix-error ETOOMANYREFS 59 "Too many references: can't splice")
(def-unix-error ETIMEDOUT 60 "Connection timed out")
(def-unix-error ECONNREFUSED 61 "Connection refused")
;;;
(def-unix-error ELOOP 62 "Too many levels of symbolic links")
(def-unix-error ENAMETOOLONG 63 "File name too long")
;;;
(def-unix-error EHOSTDOWN 64 "Host is down")
(def-unix-error EHOSTUNREACH 65 "No route to host")
(def-unix-error ENOTEMPTY 66 "Directory not empty")
;;;
;;; quotas & resource
(def-unix-error EPROCLIM 67 "Too many processes")
(def-unix-error EUSERS 68 "Too many users")
(def-unix-error EDQUOT 69 "Disc quota exceeded")
;;;
;;; CMU RFS
(def-unix-error ELOCAL 126 "namei should continue locally")
(def-unix-error EREMOTE 127 "namei was handled remotely")
;;;
;;; VICE
(def-unix-error EVICEERR 70 "Remote file system error ")
(def-unix-error EVICEOP 71 "syscall was handled by Vice")
;;;
;;; Mach Emulation
(def-unix-error ERESTART 72 "Mach Emulation Error (?)")
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
)
#+svr4
(progn
(def-unix-error ENOMSG 35 "No message of desired type")
(def-unix-error EIDRM 36 "Identifier removed")
(def-unix-error ECHRNG 37 "Channel number out of range")
(def-unix-error EL2NSYNC 38 "Level 2 not synchronized")
(def-unix-error EL3HLT 39 "Level 3 halted")
(def-unix-error EL3RST 40 "Level 3 reset")
(def-unix-error ELNRNG 41 "Link number out of range")
(def-unix-error EUNATCH 42 "Protocol driver not attached")
(def-unix-error ENOCSI 43 "No CSI structure available")
(def-unix-error EL2HLT 44 "Level 2 halted")
(def-unix-error EDEADLK 45 "Deadlock situation detected/avoided")
(def-unix-error ENOLCK 46 "No record locks available")
(def-unix-error ECANCELED 47 "Error 47")
(def-unix-error ENOTSUP 48 "Error 48")
(def-unix-error EBADE 50 "Bad exchange descriptor")
(def-unix-error EBADR 51 "Bad request descriptor")
(def-unix-error EXFULL 52 "Message tables full")
(def-unix-error ENOANO 53 "Anode table overflow")
(def-unix-error EBADRQC 54 "Bad request code")
(def-unix-error EBADSLT 55 "Invalid slot")
(def-unix-error EDEADLOCK 56 "File locking deadlock")
(def-unix-error EBFONT 57 "Bad font file format")
(def-unix-error ENOSTR 60 "Not a stream device")
(def-unix-error ENODATA 61 "No data available")
(def-unix-error ETIME 62 "Timer expired")
(def-unix-error ENOSR 63 "Out of stream resources")
(def-unix-error ENONET 64 "Machine is not on the network")
(def-unix-error ENOPKG 65 "Package not installed")
(def-unix-error EREMOTE 66 "Object is remote")
(def-unix-error ENOLINK 67 "Link has been severed")
(def-unix-error EADV 68 "Advertise error")
(def-unix-error ESRMNT 69 "Srmount error")
(def-unix-error ECOMM 70 "Communication error on send")
(def-unix-error EPROTO 71 "Protocol error")
(def-unix-error EMULTIHOP 74 "Multihop attempted")
(def-unix-error EBADMSG 77 "Not a data message")
(def-unix-error ENAMETOOLONG 78 "File name too long")
(def-unix-error EOVERFLOW 79 "Value too large for defined data type")
(def-unix-error ENOTUNIQ 80 "Name not unique on network")
(def-unix-error EBADFD 81 "File descriptor in bad state")
(def-unix-error EREMCHG 82 "Remote address changed")
(def-unix-error ELIBACC 83 "Can not access a needed shared library")
(def-unix-error ELIBBAD 84 "Accessing a corrupted shared library")
(def-unix-error ELIBSCN 85 ".lib section in a.out corrupted")
(def-unix-error ELIBMAX 86 "Attempting to link in more shared libraries than system limit")
(def-unix-error ELIBEXEC 87 "Can not exec a shared library directly")
(def-unix-error EILSEQ 88 "Error 88")
(def-unix-error ENOSYS 89 "Operation not applicable")
(def-unix-error ELOOP 90 "Number of symbolic links encountered during path name traversal exceeds MAXSYMLINKS")
(def-unix-error ERESTART 91 "Error 91")
(def-unix-error ESTRPIPE 92 "Error 92")
(def-unix-error ENOTEMPTY 93 "Directory not empty")
(def-unix-error EUSERS 94 "Too many users")
(def-unix-error ENOTSOCK 95 "Socket operation on non-socket")
(def-unix-error EDESTADDRREQ 96 "Destination address required")
(def-unix-error EMSGSIZE 97 "Message too long")
(def-unix-error EPROTOTYPE 98 "Protocol wrong type for socket")
(def-unix-error ENOPROTOOPT 99 "Option not supported by protocol")
(def-unix-error EPROTONOSUPPORT 120 "Protocol not supported")
(def-unix-error ESOCKTNOSUPPORT 121 "Socket type not supported")
(def-unix-error EOPNOTSUPP 122 "Operation not supported on transport endpoint")
(def-unix-error EPFNOSUPPORT 123 "Protocol family not supported")
(def-unix-error EAFNOSUPPORT 124 "Address family not supported by protocol family")
(def-unix-error EADDRINUSE 125 "Address already in use")
(def-unix-error EADDRNOTAVAIL 126 "Cannot assign requested address")
(def-unix-error ENETDOWN 127 "Network is down")
(def-unix-error ENETUNREACH 128 "Network is unreachable")
(def-unix-error ENETRESET 129 "Network dropped connection because of reset")
(def-unix-error ECONNABORTED 130 "Software caused connection abort")
(def-unix-error ECONNRESET 131 "Connection reset by peer")
(def-unix-error ENOBUFS 132 "No buffer space available")
(def-unix-error EISCONN 133 "Transport endpoint is already connected")
(def-unix-error ENOTCONN 134 "Transport endpoint is not connected")
(def-unix-error ESHUTDOWN 143 "Cannot send after socket shutdown")
(def-unix-error ETOOMANYREFS 144 "Too many references: cannot splice")
(def-unix-error ETIMEDOUT 145 "Connection timed out")
(def-unix-error ECONNREFUSED 146 "Connection refused")
(def-unix-error EHOSTDOWN 147 "Host is down")
(def-unix-error EHOSTUNREACH 148 "No route to host")
(def-unix-error EWOULDBLOCK 11 "Resource temporarily unavailable")
(def-unix-error EALREADY 149 "Operation already in progress")
(def-unix-error EINPROGRESS 150 "Operation now in progress")
(def-unix-error ESTALE 151 "Stale NFS file handle")
)
;;;
;;; And now for something completely different ...
(emit-unix-errors)
(def-alien-variable ("errno" unix-errno) int)
;;; GET-UNIX-ERROR-MSG -- public.
;;;
(defun get-unix-error-msg (&optional (error-number unix-errno))
"Returns a string describing the error number which was returned by a
UNIX system call."
(declare (type integer error-number))
(if (array-in-bounds-p *unix-errors* error-number)
(svref *unix-errors* error-number)
(format nil "Unknown error [~d]" error-number)))
;;;; Lisp types used by syscalls.
(deftype unix-pathname () 'simple-string)
(deftype unix-fd () `(integer 0 ,most-positive-fixnum))
#+mach
(progn
(deftype unix-file-mode () '(unsigned-byte 16))
(deftype unix-pid () '(unsigned-byte 16))
(deftype unix-uid () '(unsigned-byte 16))
(deftype unix-gid () '(unsigned-byte 16)))
#-mach
(progn
(deftype unix-file-mode () '(unsigned-byte 32))
(deftype unix-pid () '(unsigned-byte 32))
(deftype unix-uid () '(unsigned-byte 32))
(deftype unix-gid () '(unsigned-byte 32)))
(defmacro syscall ((name &rest arg-types) success-form &rest args)
`(let ((result (alien-funcall (extern-alien ,name (function int ,@arg-types))
,@args)))
(if (minusp result)
(values nil unix-errno)
,success-form)))
;;; Like syscall, but if it fails, signal an error instead of returing error
;;; codes. Should only be used for syscalls that will never really get an
;;; error.
;;;
(defmacro syscall* ((name &rest arg-types) success-form &rest args)
`(let ((result (alien-funcall (extern-alien ,name (function int ,@arg-types))
,@args)))
(if (minusp result)
(error "Syscall ~A failed: ~A" ,name (get-unix-error-msg))
,success-form)))
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
(defmacro void-syscall ((name &rest arg-types) &rest args)
`(syscall (,name ,@arg-types) (values t 0) ,@args))
(defmacro int-syscall ((name &rest arg-types) &rest args)
`(syscall (,name ,@arg-types) (values result 0) ,@args))
;;; Unix-access accepts a path and a mode. It returns two values the
;;; first is T if the file is accessible and NIL otherwise. The second
;;; only has meaning in the second case and is the unix errno value.
(defconstant r_ok 4 "Test for read permission")
(defconstant w_ok 2 "Test for write permission")
(defconstant x_ok 1 "Test for execute permission")
(defconstant f_ok 0 "Test for presence of file")
(defun unix-access (path mode)
"Given a file path (a string) and one of four constant modes,
unix-access returns T if the file is accessible with that
mode and NIL if not. It also returns an errno value with
NIL which determines why the file was not accessible.
The access modes are:
r_ok Read permission.
w_ok Write permission.
x_ok Execute permission.
f_ok Presence of file."
(declare (type unix-pathname path)
(type (mod 8) mode))
(void-syscall ("access" c-string int) path mode))
;;; Unix-chdir accepts a directory name and makes that the
;;; current working directory.
(defun unix-chdir (path)
"Given a file path string, unix-chdir changes the current working
directory to the one specified."
(declare (type unix-pathname path))
(void-syscall ("chdir" c-string) path))
;;; Unix-chmod accepts a path and a mode and changes the mode to the new mode.
(defconstant setuidexec #o4000 "Set user ID on execution")
(defconstant setgidexec #o2000 "Set group ID on execution")
(defconstant savetext #o1000 "Save text image after execution")
(defconstant readown #o400 "Read by owner")
(defconstant writeown #o200 "Write by owner")
(defconstant execown #o100 "Execute (search directory) by owner")
(defconstant readgrp #o40 "Read by group")
(defconstant writegrp #o20 "Write by group")
(defconstant execgrp #o10 "Execute (search directory) by group")
(defconstant readoth #o4 "Read by others")
(defconstant writeoth #o2 "Write by others")
(defconstant execoth #o1 "Execute (search directory) by others")
(defun unix-chmod (path mode)
"Given a file path string and a constant mode, unix-chmod changes the
permission mode for that file to the one specified. The new mode
can be created by logically OR'ing the following:
setuidexec Set user ID on execution.
setgidexec Set group ID on execution.
savetext Save text image after execution.
readown Read by owner.
writeown Write by owner.
execown Execute (search directory) by owner.
readgrp Read by group.
writegrp Write by group.
execgrp Execute (search directory) by group.
readoth Read by others.
writeoth Write by others.
execoth Execute (search directory) by others.
It returns T on successfully completion; NIL and an error number
otherwise."
(declare (type unix-pathname path)
(type unix-file-mode mode))
(void-syscall ("chmod" c-string int) path mode))
;;; Unix-fchmod accepts a file descriptor ("fd") and a file protection mode
;;; ("mode") and changes the protection of the file described by "fd" to
;;; "mode".
(defun unix-fchmod (fd mode)
"Given an integer file descriptor and a mode (the same as those
used for unix-chmod), unix-fchmod changes the permission mode
for that file to the one specified. T is returned if the call
was successful."
(declare (type unix-fd fd)
(type unix-file-mode mode))
(void-syscall ("fchmod" int int) fd mode))
(defun unix-chown (path uid gid)
"Given a file path, an integer user-id, and an integer group-id,
unix-chown changes the owner of the file and the group of the
file to those specified. Either the owner or the group may be
left unchanged by specifying them as -1. Note: Permission will
fail if the caller is not the superuser."
(declare (type unix-pathname path)
(type (or unix-uid (integer -1 -1)) uid)
(type (or unix-gid (integer -1 -1)) gid))
(void-syscall ("chown" c-string int int) path uid gid))
;;; Unix-fchown is exactly the same as unix-chown except that the file
;;; is specified by a file-descriptor ("fd") instead of a pathname.
(defun unix-fchown (fd uid gid)
"Unix-fchown is like unix-chown, except that it accepts an integer
file descriptor instead of a file path name."
(declare (type unix-fd fd)
(type (or unix-uid (integer -1 -1)) uid)
(type (or unix-gid (integer -1 -1)) gid))
(void-syscall ("fchown" int int int) fd uid gid))
;;; Returns the maximum size (i.e. the number of array elements
;;; of the file descriptor table.
(defun unix-getdtablesize ()
"Unix-getdtablesize returns the maximum size of the file descriptor
table. (i.e. the maximum number of descriptors that can exist at
one time.)"
(int-syscall ("getdtablesize")))
;;; Unix-close accepts a file descriptor and attempts to close the file
;;; associated with it.
(defun unix-close (fd)
"Unix-close takes an integer file descriptor as an argument and
closes the file associated with it. T is returned upon successful
completion, otherwise NIL and an error number."
(declare (type unix-fd fd))
(void-syscall ("close" int) fd))
;;; Unix-creat accepts a file name and a mode. It creates a new file
;;; with name and sets it mode to mode (as for chmod).
(defun unix-creat (name mode)
"Unix-creat accepts a file name and a mode (same as those for
unix-chmod) and creates a file by that name with the specified
permission mode. It returns T on success, or NIL and an error
number otherwise."
(declare (type unix-pathname name)
(type unix-file-mode mode))
(void-syscall ("creat" c-string int) name mode))
;;; Unix-dup returns a duplicate copy of the existing file-descriptor
;;; passed as an argument.
(defun unix-dup (fd)
"Unix-dup duplicates an existing file descriptor (given as the
argument) and return it. If FD is not a valid file descriptor, NIL
and an error number are returned."
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
(declare (type unix-fd fd))
(int-syscall ("dup" int) fd))
;;; Unix-dup2 makes the second file-descriptor describe the same file
;;; as the first. If the second file-descriptor points to an open
;;; file, it is first closed. In any case, the second should have a
;;; value which is a valid file-descriptor.
(defun unix-dup2 (fd1 fd2)
"Unix-dup2 duplicates an existing file descriptor just as unix-dup
does only the new value of the duplicate descriptor may be requested
through the second argument. If a file already exists with the
requested descriptor number, it will be closed and the number
assigned to the duplicate."
(declare (type unix-fd fd1 fd2))
(void-syscall ("dup2" int int) fd1 fd2))
;;; Unix-fcntl takes a file descriptor, an integer command
;;; number, and optional command arguments. It performs
;;; operations on the associated file and/or returns inform-
;;; ation about the file.
;;; Operations performed on file descriptors:
(defconstant F-DUPFD 0 "Duplicate a file descriptor")
(defconstant F-GETFD 1 "Get file desc. flags")
(defconstant F-SETFD 2 "Set file desc. flags")
(defconstant F-GETFL 3 "Get file flags")
(defconstant F-SETFL 4 "Set file flags")
#+svr4
(defconstant F-GETOWN 23 "Get owner")
#-svr4
#+svr4
(defconstant F-SETOWN 24 "Set owner")
(defconstant FNDELAY #-osf1 #o0004 #+osf1 #o100000 "Non-blocking reads")
(defconstant FASYNC #-svr4 #o0100 #+svr4 #o10000
(defconstant FCREAT #-(or hpux svr4) #o1000 #+(or hpux svr4) #o0400
(defconstant FTRUNC #-(or hpux svr4) #o2000 #+(or hpux svr4) #o1000
(defconstant FEXCL #-(or hpux svr4) #o4000 #+(or hpux svr4) #o2000
(defun unix-fcntl (fd cmd arg)
"Unix-fcntl manipulates file descriptors according to the
argument CMD which can be one of the following:
F-DUPFD Duplicate a file descriptor.
F-GETFD Get file descriptor flags.
F-SETFD Set file descriptor flags.
F-GETFL Get file flags.
F-SETFL Set file flags.
F-GETOWN Get owner.
F-SETOWN Set owner.
The flags that can be specified for F-SETFL are:
FNDELAY Non-blocking reads.
FAPPEND Append on each write.
FASYNC Signal pgrp when data ready.
FCREAT Create if nonexistant.
FTRUNC Truncate to zero length.
FEXCL Error if already created.
"
(declare (type unix-fd fd)
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
(type (unsigned-byte 16) arg))
(int-syscall ("fcntl" int int int) fd cmd arg))
;;; Unix-link creates a hard link from name2 to name1.
(defun unix-link (name1 name2)
"Unix-link creates a hard link from the file with name1 to the
file with name2."
(declare (type unix-pathname name1 name2))
(void-syscall ("link" c-string c-string) name1 name2))
;;; Unix-lseek accepts a file descriptor, an offset, and whence value.
(defconstant l_set 0 "set the file pointer")
(defconstant l_incr 1 "increment the file pointer")
(defconstant l_xtnd 2 "extend the file size")
(defun unix-lseek (fd offset whence)
"Unix-lseek accepts a file descriptor and moves the file pointer ahead
a certain offset for that file. Whence can be any of the following:
l_set Set the file pointer.
l_incr Increment the file pointer.
l_xtnd Extend the file size.
"
(declare (type unix-fd fd)
(type (unsigned-byte 32) offset)
(type (integer 0 2) whence))
(int-syscall ("lseek" int off-t int) fd offset whence))
;;; Unix-mkdir accepts a name and a mode and attempts to create the
;;; corresponding directory with mode mode.
(defun unix-mkdir (name mode)
"Unix-mkdir creates a new directory with the specified name and mode.
(Same as those for unix-fchmod.) It returns T upon success, otherwise
NIL and an error number."
(declare (type unix-pathname name)
(type unix-file-mode mode))
(void-syscall ("mkdir" c-string int) name mode))
;;; Unix-open accepts a pathname (a simple string), flags, and mode and
;;; attempts to open file with name pathname.
(defconstant o_rdonly 0 "Read-only flag.")
(defconstant o_wronly 1 "Write-only flag.")
(defconstant o_rdwr 2 "Read-write flag.")
(defconstant o_append #o10 "Append flag.")
#+svr4 (defconstant o_ndelay 4 "Non-blocking I/O")
#+(or hpux svr4)
(progn
(defconstant o_creat #o400 "Create if nonexistant flag.")
(defconstant o_trunc #o1000 "Truncate flag.")
(defconstant o_excl #o2000 "Error if already exists."))
(progn
(defconstant o_creat #o1000 "Create if nonexistant flag.")
(defconstant o_trunc #o2000 "Truncate flag.")
(defconstant o_excl #o4000 "Error if already exists."))
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
(defun unix-open (path flags mode)
"Unix-open opens the file whose pathname is specified by path
for reading and/or writing as specified by the flags argument.
The flags argument can be:
o_rdonly Read-only flag.
o_wronly Write-only flag.
o_rdwr Read-and-write flag.
o_append Append flag.
o_creat Create-if-nonexistant flag.
o_trunc Truncate-to-size-0 flag.
If the o_creat flag is specified, then the file is created with
a permission of argument mode if the file doesn't exist. An
integer file descriptor is returned by unix-open."
(declare (type unix-pathname path)
(type (unsigned-byte 16) flags)
(type unix-file-mode mode))
(int-syscall ("open" c-string int int) path flags mode))
(defun unix-pipe ()
"Unix-pipe sets up a unix-piping mechanism consisting of
an input pipe and an output pipe. Unix-Pipe returns two
values: if no error occurred the first value is the pipe
to be read from and the second is can be written to. If
an error occurred the first value is NIL and the second
the unix error code."
(with-alien ((fds (array int 2)))
(syscall ("pipe" (* int))
(values (deref fds 0) (deref fds 1))
(cast fds (* int)))))
;;; Unix-read accepts a file descriptor, a buffer, and the length to read.
;;; It attempts to read len bytes from the device associated with fd
;;; and store them into the buffer. It returns the actual number of
;;; bytes read.
(defun unix-read (fd buf len)
"Unix-read attempts to read from the file described by fd into
the buffer buf until it is full. Len is the length of the buffer.
The number of bytes actually read is returned or NIL and an error
number if an error occured."
(declare (type unix-fd fd)
(type (unsigned-byte 32) len))
#+sunos
;; Note: Under sunos we touch each page before doing the read to give
;; the segv handler a chance to fix the permissions. Otherwise,
;; read will return EFAULT. This also bypasses a bug in 4.1.1 in which
;; read fails with EFAULT if the page has never been touched even if
;; the permissions are okay.
(without-gcing
(let* ((page-size (get-page-size))
(1-page-size (1- page-size))
(sap (etypecase buf
(system-area-pointer buf)
(vector (vector-sap buf))))
(end (sap+ sap len)))
(declare (type (and fixnum unsigned-byte) page-size 1-page-size)
(type system-area-pointer sap end)
(optimize (speed 3) (safety 0)))
(do ((sap (int-sap (logand (the (unsigned-byte 32)
(+ (sap-int sap) 1-page-size))
(logxor 1-page-size (ldb (byte 32 0) -1))))
(sap+ sap page-size)))
(declare (type system-area-pointer sap))
(setf (sap-ref-8 sap 0) (sap-ref-8 sap 0)))))
(int-syscall ("read" int (* char) int) fd buf len))
(defun unix-readlink (path)
"Unix-readlink invokes the readlink system call on the file name
specified by the simple string path. It returns up to two values:
the contents of the symbolic link if the call is successful, or
NIL and the Unix error number."
(declare (type unix-pathname path))
(with-alien ((buf (array char 1024)))
(syscall ("readlink" c-string (* char) int)
(let ((string (make-string result)))
(kernel:copy-from-system-area
(alien-sap buf) 0
string (* vm:vector-data-offset vm:word-bits)
(* result vm:byte-bits))
string)
path (cast buf (* char)) 1024)))
;;; Unix-rename accepts two files names and renames the first to the second.
(defun unix-rename (name1 name2)
"Unix-rename renames the file with string name1 to the string
name2. NIL and an error code is returned if an error occured."
(declare (type unix-pathname name1 name2))
(void-syscall ("rename" c-string c-string) name1 name2))
;;; Unix-rmdir accepts a name and removes the associated directory.
(defun unix-rmdir (name)
"Unix-rmdir attempts to remove the directory name. NIL and
an error number is returned if an error occured."
(declare (type unix-pathname name))
(void-syscall ("rmdir" c-string) name))
;;; UNIX-FAST-SELECT -- public.
;;;
(defmacro unix-fast-select (num-descriptors
read-fds write-fds exception-fds
timeout-secs &optional (timeout-usecs 0))
"Perform the UNIX select(2) system call.
(declare (type (integer 0 #.FD-SETSIZE) num-descriptors)
(type (or (alien (* (struct fd-set))) null)
read-fds write-fds exception-fds)
(type (or null (unsigned-byte 31)) timeout-secs)
(type (unsigned-byte 31) timeout-usecs)
(optimize (speed 3) (safety 0) (inhibit-warnings 3)))"
`(let ((timeout-secs ,timeout-secs))
(with-alien ((tv (struct timeval)))
(when timeout-secs
(setf (slot tv 'tv-sec) timeout-secs)
(setf (slot tv 'tv-usec) ,timeout-usecs))
(int-syscall ("select" int (* (struct fd-set)) (* (struct fd-set))
(* (struct fd-set)) (* (struct timeval)))
,num-descriptors ,read-fds ,write-fds ,exception-fds
(if timeout-secs (alien-sap (addr tv)) (int-sap 0))))))
;;; Unix-select accepts sets of file descriptors and waits for an event
;;; to happen on one of them or to time out.
(defmacro num-to-fd-set (fdset num)
`(if (fixnump ,num)
(progn
(setf (deref (slot ,fdset 'fds-bits) 0) ,num)
,@(loop for index upfrom 1 below (/ fd-setsize 32)
collect `(setf (deref (slot ,fdset 'fds-bits) ,index) 0)))
(progn
,@(loop for index upfrom 0 below (/ fd-setsize 32)
collect `(setf (deref (slot ,fdset 'fds-bits) ,index)
(ldb (byte 32 ,(* index 32)) ,num))))))
(defmacro fd-set-to-num (nfds fdset)
`(if (<= ,nfds 32)
(deref (slot ,fdset 'fds-bits) 0)
(+ ,@(loop for index upfrom 0 below (/ fd-setsize 32)
collect `(ash (deref (slot ,fdset 'fds-bits) ,index)
,(* index 32))))))
(defun unix-select (nfds rdfds wrfds xpfds to-secs &optional (to-usecs 0))
"Unix-select examines the sets of descriptors passed as arguments
to see if they are ready for reading and writing. See the UNIX
Programmers Manual for more information."
(declare (type (integer 0 #.FD-SETSIZE) nfds)
(type unsigned-byte rdfds wrfds xpfds)
(type (or (unsigned-byte 31) null) to-secs)
(type (unsigned-byte 31) to-usecs)
(optimize (speed 3) (safety 0) (inhibit-warnings 3)))
(with-alien ((tv (struct timeval))
(rdf (struct fd-set))
(wrf (struct fd-set))
(xpf (struct fd-set)))
(when to-secs
(setf (slot tv 'tv-sec) to-secs)
(setf (slot tv 'tv-usec) to-usecs))
(num-to-fd-set rdf rdfds)
(num-to-fd-set wrf wrfds)
(num-to-fd-set xpf xpfds)
(macrolet ((frob (lispvar alienvar)
`(if (zerop ,lispvar)
(int-sap 0)
(alien-sap (addr ,alienvar)))))
(syscall ("select" int (* (struct fd-set)) (* (struct fd-set))
(* (struct fd-set)) (* (struct timeval)))
(values result
(fd-set-to-num nfds rdf)
(fd-set-to-num nfds wrf)
(fd-set-to-num nfds xpf))
(if to-secs (alien-sap (addr tv)) (int-sap 0))))))
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
;;; Unix-sync writes all information in core memory which has been modified
;;; to permanent storage (i.e. disk).
(defun unix-sync ()
"Unix-sync writes all information in core memory which has been
modified to disk. It returns NIL and an error code if an error
occured."
(void-syscall ("sync")))
;;; Unix-fsync writes the core-image of the file described by "fd" to
;;; permanent storage (i.e. disk).
(defun unix-fsync (fd)
"Unix-fsync writes the core image of the file described by
fd to disk."
(declare (type unix-fd fd))
(void-syscall ("fsync" int) fd))
;;; Unix-truncate accepts a file name and a new length. The file is
;;; truncated to the new length.
(defun unix-truncate (name len)
"Unix-truncate truncates the named file to the length (in
bytes) specified by len. NIL and an error number is returned
if the call is unsuccessful."
(declare (type unix-pathname name)
(type (unsigned-byte 32) len))
(void-syscall ("truncate" c-string int) name len))
(defun unix-ftruncate (fd len)
"Unix-ftruncate is similar to unix-truncate except that the first
argument is a file descriptor rather than a file name."
(declare (type unix-fd fd)
(type (unsigned-byte 32) len))
(void-syscall ("ftruncate" int int) fd len))
(defun unix-symlink (name1 name2)
"Unix-symlink creates a symbolic link named name2 to the file
named name1. NIL and an error number is returned if the call
is unsuccessful."
(declare (type unix-pathname name1 name2))
(void-syscall ("symlink" c-string c-string) name1 name2))
;;; Unix-unlink accepts a name and deletes the directory entry for that
;;; name and the file if this is the last link.
(defun unix-unlink (name)
"Unix-unlink removes the directory entry for the named file.
NIL and an error code is returned if the call fails."
(declare (type unix-pathname name))
(void-syscall ("unlink" c-string) name))
;;; Unix-write accepts a file descriptor, a buffer, an offset, and the
;;; length to write. It attempts to write len bytes to the device
;;; associated with fd from the the buffer starting at offset. It returns
;;; the actual number of bytes written.
(defun unix-write (fd buf offset len)
"Unix-write attempts to write a character buffer (buf) of length
len to the file described by the file descriptor fd. NIL and an
error is returned if the call is unsuccessful."
(declare (type unix-fd fd)
(type (unsigned-byte 32) offset len))
(int-syscall ("write" int (* char) int)
fd
(with-alien ((ptr (* char) (etypecase buf
((simple-array * (*))
(vector-sap buf))
(system-area-pointer
buf))))
(addr (deref ptr offset)))
len))
;;; Unix-ioctl is used to change parameters of devices in a device
;;; dependent way.
(defconstant terminal-speeds
'#(nil 50 75 110 nil 150 200 300 600 1200 1800 2400 4800 9600 nil nil))
(defconstant tty-raw #o40)
(defconstant tty-crmod #o20)
(defconstant tty-echo #o10)
(defconstant tty-lcase #o4)
(progn
(defconstant tty-icanon #o2)
(defconstant tty-icrnl #o400)
(defconstant tty-ocrnl #o10)
(defconstant veof 4)
(defconstant vintr 0)
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
(defconstant vquit 1))
#+hpux
(progn
(defconstant vdsusp 21)
(defconstant vstart 14)
(defconstant vstop 15)
(defconstant vsusp 13)
(defconstant vmin 11)
(defconstant vtime 12)
(defconstant tcsaflush 2))
#+svr4
(progn
(defconstant vdsusp 11)
(defconstant vstart 8)
(defconstant vstop 9)
(defconstant vsusp 10)
(defconstant vmin 4)
(defconstant vtime 5)
(defconstant tcsaflush #x5410))
(defconstant iocparm-mask #x7f)
(defconstant ioc_void #x20000000)
(defconstant ioc_out #x40000000)
(defconstant ioc_in #x80000000)
(defconstant ioc_inout (logior ioc_in ioc_out))
(defmacro define-ioctl-command (name dev cmd arg &optional (parm-type :void))
(:inout ioc_inout)))
(code (logior (ash (char-code dev) 8) cmd ptype)))
(when arg
(setf code
`(logior (ash (logand (alien-size ,arg :bytes)
,iocparm-mask)
16)
,code)))
(defmacro define-ioctl-command (name dev cmd arg &optional (parm-type :void))
`(eval-when (eval load compile)
(defconstant ,name ,(logior (ash (char-code #\t) 8) cmd))))
(define-ioctl-command TIOCGETP #\t 8 (struct sgttyb) :out)
(define-ioctl-command TIOCSETP #\t 9 (struct sgttyb) :in)
(define-ioctl-command TIOCFLUSH #\t 16 int :in)
(define-ioctl-command TIOCSETC #\t 17 (struct tchars) :in)
(define-ioctl-command TIOCGETC #\t 18 (struct tchars) :out)
(define-ioctl-command TIOCGWINSZ #\t #-hpux 104 #+hpux 107 (struct winsize)
:out)
(define-ioctl-command TIOCSWINSZ #\t #-hpux 103 #+hpux 106 (struct winsize)
:in)
#-hpux
(progn
(define-ioctl-command TIOCSLTC #\t 117 (struct ltchars) :in)
(define-ioctl-command TIOCGLTC #\t 116 (struct ltchars) :out)
(define-ioctl-command TIOCSPGRP #\t #-svr4 118 #+svr4 21 int :in)
(define-ioctl-command TIOCGPGRP #\t #-svr4 119 #+svr4 20 int :out))
#+hpux
(progn
(define-ioctl-command TIOCSLTC #\T 23 (struct ltchars) :in)
(define-ioctl-command TIOCGLTC #\T 24 (struct ltchars) :out)
(define-ioctl-command TIOCSPGRP #\T 29 int :in)
(define-ioctl-command TIOCGPGRP #\T 30 int :out)
(define-ioctl-command TIOCSIGSEND #\t 93 int :in))
(defun unix-ioctl (fd cmd arg)
"Unix-ioctl performs a variety of operations on open i/o
descriptors. See the UNIX Programmer's Manual for more
information."
(declare (type unix-fd fd)
(type (unsigned-byte 32) cmd))
(void-syscall ("ioctl" int unsigned-int (* char)) fd cmd arg))
(defun unix-tcgetattr (fd termios)
"Get terminal attributes."
(declare (type unix-fd fd))
(void-syscall ("tcgetattr" int (* (struct termios))) fd termios))
(defun unix-tcsetattr (fd opt termios)
"Set terminal attributes."
(declare (type unix-fd fd))
(void-syscall ("tcsetattr" int int (* (struct termios))) fd opt termios))
(defun tcsetpgrp (fd pgrp)
"Set the tty-process-group for the unix file-descriptor FD to PGRP."
(alien:with-alien ((alien-pgrp c-call:int pgrp))
(unix-ioctl fd
tiocspgrp
(alien:alien-sap (alien:addr alien-pgrp)))))
(defun tcgetpgrp (fd)
"Get the tty-process-group for the unix file-descriptor FD."
(alien:with-alien ((alien-pgrp c-call:int))
(multiple-value-bind (ok err)
(unix-ioctl fd
tiocgpgrp
(alien:alien-sap (alien:addr alien-pgrp)))
(if ok
(values alien-pgrp nil)
(values nil err)))))
(defun (fd)
"Get the tty-process-group for the unix file-descriptor FD."
1275
1276
1277
1278
1279
1280
1281
1282
1283
1284
1285
1286
1287
1288
1289
1290
1291
1292
1293
1294
1295
1296
1297
1298
1299
1300
1301
1302
1303
1304
1305
1306
1307
1308
1309
1310
1311
1312
1313
1314
1315
1316
1317
1318
1319
1320
1321
1322
1323
(alien:with-alien ((alien-pgrp c-call:int))
(multiple-value-bind (ok err)
(unix-ioctl fd
tiocgpgrp
(alien:alien-sap (alien:addr alien-pgrp)))
(if ok
(values alien-pgrp nil)
(values nil err)))))
(defun tty-process-group (&optional fd)
"Get the tty-process-group for the unix file-descriptor FD. If not supplied,
FD defaults to /dev/tty."
(if fd
(tcgetpgrp fd)
(multiple-value-bind (tty-fd errno)
(unix-open "/dev/tty" o_rdwr 0)
(cond (tty-fd
(multiple-value-prog1
(tcgetpgrp tty-fd)
(unix-close tty-fd)))
(t
(values nil errno))))))
(defun %set-tty-process-group (pgrp &optional fd)
"Set the tty-process-group for the unix file-descriptor FD to PGRP. If not
supplied, FD defaults to /dev/tty."
(let ((old-sigs
(unix-sigblock
(sigmask :sigttou :sigttin :sigtstp :sigchld))))
(declare (type (unsigned-byte 32) old-sigs))
(unwind-protect
(if fd
(tcsetpgrp fd pgrp)
(multiple-value-bind (tty-fd errno)
(unix-open "/dev/tty" o_rdwr 0)
(cond (tty-fd
(multiple-value-prog1
(tcsetpgrp tty-fd pgrp)
(unix-close tty-fd)))
(t
(values nil errno)))))
(unix-sigsetmask old-sigs))))
(defsetf tty-process-group (&optional fd) (pgrp)
"Set the tty-process-group for the unix file-descriptor FD to PGRP. If not
supplied, FD defaults to /dev/tty."
`(%set-tty-process-group ,pgrp ,fd))
;;; Socket options.
#+hpux
(define-ioctl-command SIOCSPGRP #\s 8 int :in)
#+hpux
(defun siocspgrp (fd pgrp)
"Set the socket process-group for the unix file-descriptor FD to PGRP."
(alien:with-alien ((alien-pgrp c-call:int pgrp))
(unix-ioctl fd
siocspgrp
(alien:alien-sap (alien:addr alien-pgrp)))))
1337
1338
1339
1340
1341
1342
1343
1344
1345
1346
1347
1348
1349
1350
1351
1352
1353
1354
1355
1356
1357
;;; Unix-exit terminates a program.
(defun unix-exit (&optional (code 0))
"Unix-exit terminates the current process with an optional
error code. If successful, the call doesn't return. If
unsuccessful, the call returns NIL and an error number."
(declare (type (signed-byte 32) code))
(void-syscall ("exit" int) code))
;;; STAT and friends.
(defmacro extract-stat-results (buf)
`(values T
(slot ,buf 'st-dev)
(slot ,buf 'st-ino)
(slot ,buf 'st-mode)
(slot ,buf 'st-nlink)
(slot ,buf 'st-uid)
(slot ,buf 'st-gid)
(slot ,buf 'st-rdev)
(slot ,buf 'st-size)
#-svr4 (slot ,buf 'st-atime)
#+svr4 (slot (slot ,buf 'st-atime) 'tv-sec)
#-svr4 (slot ,buf 'st-mtime)
#+svr4 (slot (slot ,buf 'st-mtime) 'tv-sec)
#-svr4 (slot ,buf 'st-ctime)
#+svr4 (slot (slot ,buf 'st-ctime) 'tv-sec)
(slot ,buf 'st-blksize)
(slot ,buf 'st-blocks)))
(defun unix-stat (name)
"Unix-stat retrieves information about the specified
file returning them in the form of multiple values.
See the UNIX Programmer's Manual for a description
of the values returned. If the call fails, then NIL
and an error number is returned instead."
(declare (type unix-pathname name))
1376
1377
1378
1379
1380
1381
1382
1383
1384
1385
1386
1387
1388
1389
1390
1391
1392
1393
1394
1395
1396
1397
1398
1399
1400
1401
1402
1403
(with-alien ((buf (struct stat)))
(syscall ("stat" c-string (* (struct stat)))
(extract-stat-results buf)
name (addr buf))))
(defun unix-lstat (name)
"Unix-lstat is similar to unix-stat except the specified
file must be a symbolic link."
(declare (type unix-pathname name))
(with-alien ((buf (struct stat)))
(syscall ("lstat" c-string (* (struct stat)))
(extract-stat-results buf)
name (addr buf))))
(defun unix-fstat (fd)
"Unix-fstat is similar to unix-stat except the file is specified
by the file descriptor fd."
(declare (type unix-fd fd))
(with-alien ((buf (struct stat)))
(syscall ("fstat" int (* (struct stat)))
(extract-stat-results buf)
fd (addr buf))))
(defconstant rusage_self 0 "The calling process.")
(defconstant rusage_children -1 "Terminated child processes.")
(declaim (inline unix-fast-getrusage))
(defun unix-fast-getrusage (who)
"Like call getrusage, but return only the system and user time, and returns
the seconds and microseconds as separate values."
(declare (values (member t)
(unsigned-byte 31) (mod 1000000)
(unsigned-byte 31) (mod 1000000)))
(with-alien ((usage (struct rusage)))
(syscall* ("getrusage" int (* (struct rusage)))
(values t
(slot (slot usage 'ru-utime) 'tv-sec)
(slot (slot usage 'ru-utime) 'tv-usec)
(slot (slot usage 'ru-stime) 'tv-sec)
(slot (slot usage 'ru-stime) 'tv-usec))
who (addr usage))))
(defun unix-getrusage (who)
"Unix-getrusage returns information about the resource usage
of the process specified by who. Who can be either the
current process (rusage_self) or all of the terminated
child processes (rusage_children). NIL and an error number
is returned if the call fails."
(with-alien ((usage (struct rusage)))
1427
1428
1429
1430
1431
1432
1433
1434
1435
1436
1437
1438
1439
1440
1441
1442
1443
1444
1445
1446
1447
(syscall* ("getrusage" int (* (struct rusage)))
(values t
(+ (* (slot (slot usage 'ru-utime) 'tv-sec) 1000000)
(slot (slot usage 'ru-utime) 'tv-usec))
(+ (* (slot (slot usage 'ru-stime) 'tv-sec) 1000000)
(slot (slot usage 'ru-stime) 'tv-usec))
(slot usage 'ru-maxrss)
(slot usage 'ru-ixrss)
(slot usage 'ru-idrss)
(slot usage 'ru-isrss)
(slot usage 'ru-minflt)
(slot usage 'ru-majflt)
(slot usage 'ru-nswap)
(slot usage 'ru-inblock)
(slot usage 'ru-oublock)
(slot usage 'ru-msgsnd)
(slot usage 'ru-msgrcv)
(slot usage 'ru-nsignals)
(slot usage 'ru-nvcsw)
(slot usage 'ru-nivcsw))
who (addr usage))))
1449
1450
1451
1452
1453
1454
1455
1456
1457
1458
1459
1460
1461
1462
1463
1464
1465
1466
1467
1468
1469
1470
1471
;; Requires call to tzset() in main.
;; Don't use this now: we
#+svr4
(progn
(def-alien-variable ("daylight" unix-daylight) int)
(def-alien-variable ("timezone" unix-timezone) time-t)
(def-alien-variable ("altzone" unix-altzone) time-t)
(def-alien-variable ("tzname" unix-tzname) (array c-string 2))
(def-alien-routine get-timezone c-call:void
(when c-call:long :in)
(minutes-west c-call:int :out)
(daylight-savings-p alien:boolean :out))
(defun unix-get-minutes-west (secs)
(multiple-value-bind (ignore minutes dst) (get-timezone secs)
(declare (ignore ignore) (ignore dst))
(values minutes))
)
(defun unix-get-timezone (secs)
(multiple-value-bind (ignore minutes dst) (get-timezone secs)
(declare (ignore ignore) (ignore minutes))
(values (deref unix-tzname (if dst 1 0)))
) )
)
(declaim (inline unix-gettimeofday))
(defun unix-gettimeofday ()
"If it works, unix-gettimeofday returns 5 values: T, the seconds and
microseconds of the current time of day, the timezone (in minutes west
of Greenwich), and a daylight-savings flag. If it doesn't work, it
returns NIL and the errno."
(with-alien ((tv (struct timeval))
#-svr4 (tz (struct timezone)))
(syscall* ("gettimeofday" (* (struct timeval)) #-svr4 (* (struct timezone)))
(values T
(slot tv 'tv-sec)
(slot tv 'tv-usec)
#-svr4 (slot tz 'tz-minuteswest)
#+svr4 (unix-get-minutes-west (slot tv 'tv-sec))
#-svr4 (slot tz 'tz-dsttime)
#+svr4 (unix-get-timezone (slot tv 'tv-sec))
)
(addr tv)
;;; Unix-utimes changes the accessed and updated times on UNIX
;;; files. The first argument is the filename (a string) and
;;; the second argument is a list of the 4 times- accessed and
;;; updated seconds and microseconds.
1498
1499
1500
1501
1502
1503
1504
1505
1506
1507
1508
1509
1510
1511
1512
1513
1514
1515
1516
1517
1518
1519
(defun unix-utimes (file atime-sec atime-usec mtime-sec mtime-usec)
"Unix-utimes sets the 'last-accessed' and 'last-updated'
times on a specified file. NIL and an error number is
returned if the call is unsuccessful."
(declare (type unix-pathname file)
(type (alien unsigned-long)
atime-sec atime-usec
mtime-sec mtime-usec))
(with-alien ((tvp (array (struct timeval) 2)))
(setf (slot (deref tvp 0) 'tv-sec) atime-sec)
(setf (slot (deref tvp 0) 'tv-usec) atime-usec)
(setf (slot (deref tvp 1) 'tv-sec) mtime-sec)
(setf (slot (deref tvp 1) 'tv-usec) mtime-usec)
(void-syscall ("utimes" c-string (* (struct timeval)))
file
(cast tvp (* (struct timeval))))))
;;; Unix-setreuid sets the real and effective user-id's of the current
;;; process to the arguments "ruid" and "euid", respectively. Usage is
;;; restricted for anyone but the super-user. Setting either "ruid" or
;;; "euid" to -1 makes the system use the current id instead.
(defun unix-setreuid (ruid euid)
"Unix-setreuid sets the real and effective user-id's of the current
process to the specified ones. NIL and an error number is returned
if the call fails."
(void-syscall ("setreuid" int int) ruid euid))
;;; Unix-setregid sets the real and effective group-id's of the current
;;; process to the arguments "rgid" and "egid", respectively. Usage is
;;; restricted for anyone but the super-user. Setting either "rgid" or
;;; "egid" to -1 makes the system use the current id instead.
1533
1534
1535
1536
1537
1538
1539
1540
1541
1542
1543
1544
1545
1546
1547
1548
1549
1550
1551
1552
1553
1554
1555
1556
1557
1558
1559
1560
1561
1562
1563
1564
1565
1566
1567
(defun unix-setregid (rgid egid)
"Unix-setregid sets the real and effective group-id's of the current
process process to the specified ones. NIL and an error number is
returned if the call fails."
(void-syscall ("setregid" int int) rgid egid))
(def-alien-routine ("getpid" unix-getpid) int
"Unix-getpid returns the process-id of the current process.")
(def-alien-routine ("getppid" unix-getppid) int
"Unix-getppid returns the process-id of the parent of the current process.")
(def-alien-routine ("getgid" unix-getgid) int
"Unix-getgid returns the real group-id of the current process.")
(def-alien-routine ("getegid" unix-getegid) int
"Unix-getegid returns the effective group-id of the current process.")
;;; Unix-getpgrp returns the group-id associated with the
;;; process whose process-id is specified as an argument.
;;; As usual, if the process-id is 0, it refers to the current
;;; process.
(defun unix-getpgrp (pid)
"Unix-getpgrp returns the group-id of the process associated
with pid."
(int-syscall ("getpgrp" int) pid))
;;; Unix-setpgrp sets the group-id of the process specified by
;;; "pid" to the value of "pgrp". The process must either have
;;; the same effective user-id or be a super-user process.
(defun unix-setpgrp (pid pgrp)
"Unix-setpgrp sets the process group on the process pid to
pgrp. NIL and an error number is returned upon failure."
(void-syscall (#-svr4 "setpgrp" #+svr4 "setpgid" int int) pid pgrp))
1569
1570
1571
1572
1573
1574
1575
1576
1577
1578
1579
1580
1581
1582
1583
1584
1585
1586
1587
1588
1589
1590
(def-alien-routine ("getuid" unix-getuid) int
"Unix-getuid returns the real user-id associated with the
current process.")
;;; Unix-getpagesize returns the number of bytes in the system page.
(defun unix-getpagesize ()
"Unix-getpagesize returns the number of bytes in a system page."
(int-syscall ("getpagesize")))
(defun unix-gethostname ()
"Unix-gethostname returns the name of the host machine as a string."
(with-alien ((buf (array char 256)))
(syscall ("gethostname" (* char) int)
(cast buf c-string)
(cast buf (* char)) 256)))
(def-alien-routine ("gethostid" unix-gethostid) unsigned-long
"Unix-gethostid returns a 32-bit integer which provides unique
identification for the host machine.")
(defun unix-fork ()
"Executes the unix fork system call. Returns 0 in the child and the pid
of the child in the parent if it works, or NIL and an error number if it
doesn't work."
(int-syscall ("fork")))
;;; Operations on Unix Directories.
(export '(open-dir read-dir close-dir))
(defstruct (directory
(:print-function %print-directory))
name
(dir-struct (required-argument) :type system-area-pointer))
(defun %print-directory (dir stream depth)
(declare (ignore depth))
(format stream "#<Directory ~S>" (directory-name dir)))
(defun open-dir (pathname)
(declare (type unix-pathname pathname))
1616
1617
1618
1619
1620
1621
1622
1623
1624
1625
1626
1627
1628
1629
1630
1631
1632
1633
1634
1635
1636
1637
1638
1639
1640
1641
(let ((kind (unix-file-kind pathname)))
(case kind
(:directory
(let ((dir-struct
(alien-funcall (extern-alien "opendir"
(function system-area-pointer
c-string))
pathname)))
(if (zerop (sap-int dir-struct))
(values nil unix-errno)
(make-directory :name pathname :dir-struct dir-struct))))
((nil)
(values nil enoent))
(t
(values nil enotdir)))))
(defun read-dir (dir)
(declare (type directory dir))
(let ((daddr (alien-funcall (extern-alien "readdir"
(function system-area-pointer
system-area-pointer))
(directory-dir-struct dir))))
(declare (type system-area-pointer daddr))
(if (zerop (sap-int daddr))
nil
(with-alien ((direct (* (struct direct)) daddr))
(let ((nlen (slot direct 'd-namlen))
(ino (slot direct 'd-ino)))
(declare (type (unsigned-byte 16) nlen))
(let ((string (make-string nlen)))
(kernel:copy-from-system-area
(alien-sap (addr (slot direct 'd-name))) 0
string (* vm:vector-data-offset vm:word-bits)
(* nlen vm:byte-bits))
(values (cast (slot direct 'd-name) c-string)
(slot direct 'd-ino))))))
1655
1656
1657
1658
1659
1660
1661
1662
1663
1664
1665
1666
1667
1668
1669
1670
1671
1672
1673
1674
1675
1676
1677
1678
1679
1680
1681
1682
1683
1684
1685
1686
1687
1688
1689
1690
1691
1692
1693
1694
1695
1696
1697
1698
1699
1700
1701
1702
1703
1704
1705
1706
1707
1708
1709
1710
1711
1712
1713
1714
1715
1716
1717
1718
1719
1720
1721
1722
1723
1724
1725
1726
1727
1728
1729
1730
1731
1732
1733
1734
1735
1736
1737
1738
1739
1740
1741
1742
1743
1744
1745
1746
1747
1748
1749
1750
1751
1752
1753
1754
1755
1756
1757
1758
1759
1760
1761
1762
1763
1764
1765
1766
1767
1768
1769
1770
1771
1772
1773
1774
1775
1776
1777
1778
1779
1780
1781
1782
1783
1784
1785
1786
1787
1788
1789
1790
1791
1792
1793
1794
1795
1796
1797
1798
1799
1800
1801
1802
1803
1804
1805
1806
1807
1808
1809
1810
1811
1812
1813
1814
1815
1816
1817
1818
1819
1820
1821
1822
1823
1824
1825
1826
1827
1828
1829
1830
1831
1832
1833
1834
1835
1836
1837
1838
1839
1840
1841
1842
1843
1844
1845
1846
1847
1848
1849
1850
1851
1852
1853
1854
1855
1856
1857
1858
1859
1860
1861
1862
1863
1864
1865
1866
1867
1868
1869
1870
1871
1872
1873
1874
1875
1876
1877
1878
1879
1880
1881
1882
1883
1884
1885
1886
1887
1888
1889
1890
1891
1892
1893
1894
1895
1896
1897
1898
1899
1900
1901
1902
1903
1904
1905
1906
1907
1908
1909
1910
1911
1912
1913
1914
1915
1916
1917
1918
1919
1920
1921
1922
1923
1924
1925
1926
1927
1928
1929
1930
1931
1932
(defun close-dir (dir)
(declare (type directory dir))
(alien-funcall (extern-alien "closedir"
(function void system-area-pointer))
(directory-dir-struct dir))
nil)
(defun unix-current-directory ()
(with-alien ((buf (array char 1024)))
(values (not (zerop (alien-funcall (extern-alien "getwd"
(function int (* char)))
(cast buf (* char)))))
(cast buf c-string))))
;;;; Support routines for dealing with unix pathnames.
(export '(unix-file-kind unix-maybe-prepend-current-directory
unix-resolve-links unix-simplify-pathname))
(defun unix-file-kind (name &optional check-for-links)
"Returns either :file, :directory, :link, :special, or NIL."
(declare (simple-string name))
(multiple-value-bind (res dev ino mode)
(if check-for-links
(unix-lstat name)
(unix-stat name))
(declare (type (or fixnum null) mode)
(ignore dev ino))
(when res
(let ((kind (logand mode s-ifmt)))
(cond ((eql kind s-ifdir) :directory)
((eql kind s-ifreg) :file)
((eql kind s-iflnk) :link)
(t :special))))))
(defun unix-maybe-prepend-current-directory (name)
(declare (simple-string name))
(if (and (> (length name) 0) (char= (schar name 0) #\/))
name
(multiple-value-bind (win dir) (unix-current-directory)
(if win
(concatenate 'simple-string dir "/" name)
name))))
(defun unix-resolve-links (pathname)
"Returns the pathname with all symbolic links resolved."
(declare (simple-string pathname))
(let ((len (length pathname))
(pending pathname))
(declare (fixnum len) (simple-string pending))
(if (zerop len)
pathname
(let ((result (make-string 1024 :initial-element (code-char 0)))
(fill-ptr 0)
(name-start 0))
(loop
(let* ((name-end (or (position #\/ pending :start name-start) len))
(new-fill-ptr (+ fill-ptr (- name-end name-start))))
(replace result pending
:start1 fill-ptr
:end1 new-fill-ptr
:start2 name-start
:end2 name-end)
(let ((kind (unix-file-kind (if (zerop name-end) "/" result) t)))
(unless kind (return nil))
(cond ((eq kind :link)
(multiple-value-bind (link err) (unix-readlink result)
(unless link
(error "Error reading link ~S: ~S"
(subseq result 0 fill-ptr)
(get-unix-error-msg err)))
(cond ((or (zerop (length link))
(char/= (schar link 0) #\/))
;; It's a relative link
(fill result (code-char 0)
:start fill-ptr
:end new-fill-ptr))
((string= result "/../" :end1 4)
;; It's across the super-root.
(let ((slash (or (position #\/ result :start 4)
0)))
(fill result (code-char 0)
:start slash
:end new-fill-ptr)
(setf fill-ptr slash)))
(t
;; It's absolute.
(and (> (length link) 0)
(char= (schar link 0) #\/))
(fill result (code-char 0) :end new-fill-ptr)
(setf fill-ptr 0)))
(setf pending
(if (= name-end len)
link
(concatenate 'simple-string
link
(subseq pending name-end))))
(setf len (length pending))
(setf name-start 0)))
((= name-end len)
(return (subseq result 0 new-fill-ptr)))
((eq kind :directory)
(setf (schar result new-fill-ptr) #\/)
(setf fill-ptr (1+ new-fill-ptr))
(setf name-start (1+ name-end)))
(t
(return nil))))))))))
(defun unix-simplify-pathname (src)
(declare (simple-string src))
(let* ((src-len (length src))
(dst (make-string src-len))
(dst-len 0)
(dots 0)
(last-slash nil))
(macrolet ((deposit (char)
`(progn
(setf (schar dst dst-len) ,char)
(incf dst-len))))
(dotimes (src-index src-len)
(let ((char (schar src src-index)))
(cond ((char= char #\.)
(when dots
(incf dots))
(deposit char))
((char= char #\/)
(case dots
(0
;; Either ``/...' or ``...//...'
(unless last-slash
(setf last-slash dst-len)
(deposit char)))
(1
;; Either ``./...'' or ``..././...''
(decf dst-len))
(2
;; We've found ..
(cond
((and last-slash (not (zerop last-slash)))
;; There is something before this ..
(let ((prev-prev-slash
(position #\/ dst :end last-slash :from-end t)))
(cond ((and (= (+ (or prev-prev-slash 0) 2)
last-slash)
(char= (schar dst (- last-slash 2)) #\.)
(char= (schar dst (1- last-slash)) #\.))
;; The something before this .. is another ..
(deposit char)
(setf last-slash dst-len))
(t
;; The something is some random dir.
(setf dst-len
(if prev-prev-slash
(1+ prev-prev-slash)
0))
(setf last-slash prev-prev-slash)))))
(t
;; There is nothing before this .., so we need to keep it
(setf last-slash dst-len)
(deposit char))))
(t
;; Something other than a dot between slashes.
(setf last-slash dst-len)
(deposit char)))
(setf dots 0))
(t
(setf dots nil)
(setf (schar dst dst-len) char)
(incf dst-len))))))
(when (and last-slash (not (zerop last-slash)))
(case dots
(1
;; We've got ``foobar/.''
(decf dst-len))
(2
;; We've got ``foobar/..''
(unless (and (>= last-slash 2)
(char= (schar dst (1- last-slash)) #\.)
(char= (schar dst (- last-slash 2)) #\.)
(or (= last-slash 2)
(char= (schar dst (- last-slash 3)) #\/)))
(let ((prev-prev-slash
(position #\/ dst :end last-slash :from-end t)))
(if prev-prev-slash
(setf dst-len (1+ prev-prev-slash))
(return-from unix-simplify-pathname "./")))))))
(cond ((zerop dst-len)
"./")
((= dst-len src-len)
dst)
(t
(subseq dst 0 dst-len)))))
;;;; Other random routines.
(def-alien-routine ("isatty" unix-isatty) boolean
"Accepts a Unix file descriptor and returns T if the device
associated with it is a terminal."
(fd int))
(def-alien-routine ("ttyname" unix-ttyname) c-string
(fd int))
;;;; UNIX-EXECVE
(defun unix-execve (program &optional arg-list
(environment *environment-list*))
"Executes the Unix execve system call. If the system call suceeds, lisp
will no longer be running in this process. If the system call fails this
function returns two values: NIL and an error code. Arg-list should be a
list of simple-strings which are passed as arguments to the exec'ed program.
Environment should be an a-list mapping symbols to simple-strings which this
function bashes together to form the environment for the exec'ed program."
(check-type program simple-string)
(let ((env-list (let ((envlist nil))
(dolist (cons environment)
(push (if (cdr cons)
(concatenate 'simple-string
(string (car cons)) "="
(cdr cons))
(car cons))
envlist))
envlist)))
(sub-unix-execve program arg-list env-list)))
(defmacro round-bytes-to-words (n)
`(logand (the fixnum (+ (the fixnum ,n) 3)) (lognot 3)))
;;;
;;; STRING-LIST-TO-C-STRVEC -- Internal
;;;
;;; STRING-LIST-TO-C-STRVEC is a function which takes a list of
;;; simple-strings and constructs a C-style string vector (strvec) --
;;; a null-terminated array of pointers to null-terminated strings.
;;; This function returns two values: a sap and a byte count. When the
;;; memory is no longer needed it should be deallocated with
;;; vm_deallocate.
;;;
(defun string-list-to-c-strvec (string-list)
;;
;; Make a pass over string-list to calculate the amount of memory
;; needed to hold the strvec.
(let ((string-bytes 0)
(vec-bytes (* 4 (1+ (length string-list)))))
(declare (fixnum string-bytes vec-bytes))
(dolist (s string-list)
(check-type s simple-string)
(incf string-bytes (round-bytes-to-words (1+ (length s)))))
;;
;; Now allocate the memory and fill it in.
(let* ((total-bytes (+ string-bytes vec-bytes))
(vec-sap (system:allocate-system-memory total-bytes))
(string-sap (sap+ vec-sap vec-bytes))
(i 0))
(declare (type (and unsigned-byte fixnum) total-bytes i)
(type system:system-area-pointer vec-sap string-sap))
(dolist (s string-list)
(declare (simple-string s))
(let ((n (length s)))
;;
;; Blast the string into place
(kernel:copy-to-system-area (the simple-string s)
(* vm:vector-data-offset vm:word-bits)
string-sap 0
(* (1+ n) vm:byte-bits))
;;
;; Blast the pointer to the string into place
(setf (sap-ref-sap vec-sap i) string-sap)
(setf string-sap (sap+ string-sap (round-bytes-to-words (1+ n))))
1934
1935
1936
1937
1938
1939
1940
1941
1942
1943
1944
1945
1946
1947
1948
1949
1950
1951
1952
1953
1954
1955
1956
1957
1958
;; Blast in last null pointer
(setf (sap-ref-sap vec-sap i) (int-sap 0))
(values vec-sap total-bytes))))
(defun sub-unix-execve (program arg-list env-list)
(let ((argv nil)
(argv-bytes 0)
(envp nil)
(envp-bytes 0)
result error-code)
(unwind-protect
(progn
;; Blast the stuff into the proper format
(multiple-value-setq
(argv argv-bytes)
(string-list-to-c-strvec arg-list))
(multiple-value-setq
(envp envp-bytes)
(string-list-to-c-strvec env-list))
;;
;; Now do the system call
(multiple-value-setq
(result error-code)
(int-syscall ("execve"
(* char) system-area-pointer system-area-pointer)
(vector-sap program) argv envp)))
1960
1961
1962
1963
1964
1965
1966
1967
1968
1969
1970
1971
1972
1973
1974
1975
1976
1977
1978
1979
1980
1981
1982
1983
1984
1985
1986
1987
1988
1989
1990
1991
1992
1993
1994
1995
1996
1997
1998
1999
2000
2001
2002
2003
2004
2005
2006
;;
;; Deallocate memory
(when argv
(system:deallocate-system-memory argv argv-bytes))
(when envp
(system:deallocate-system-memory envp envp-bytes)))
(values result error-code)))
;;;; Socket support.
(def-alien-routine ("socket" unix-socket) int
(domain int)
(type int)
(protocol int))
(def-alien-routine ("connect" unix-connect) int
(socket int)
(sockaddr (* t))
(len int))
(def-alien-routine ("bind" unix-bind) int
(socket int)
(sockaddr (* t))
(len int))
(def-alien-routine ("listen" unix-listen) int
(socket int)
(backlog int))
(def-alien-routine ("accept" unix-accept) int
(socket int)
(sockaddr (* t))
(len int :in-out))
(def-alien-routine ("recv" unix-recv) int
(fd int)
(buffer c-string)
(length int)
(flags int))
(def-alien-routine ("send" unix-send) int
(fd int)
(buffer c-string)
(length int)
(flags int))