Newer
Older
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)
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
(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))
#-(and x86 freebsd) (int-syscall ("lseek" int off-t int) fd offset whence)
;; Need a 64-bit return value type for this. TBD. For now,
;; don't use this with any 2G+ partitions.
#+(and freebsd x86) (int-syscall ("lseek" int unsigned-long unsigned-long int)
fd offset 0 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.")
#+(or linux svr4 freebsd)
(defconstant o_ndelay #-linux 4 #+linux #o4000 "Non-blocking I/O")
(defconstant o_append #-linux #o10 #+linux #o2000 "Append flag.")
#+(or hpux svr4 linux)
(progn
(defconstant o_creat #-linux #o400 #+linux #o100 "Create if nonexistant flag.")
(defconstant o_trunc #o1000 "Truncate flag.")
(defconstant o_excl #-linux #o2000 #+linux #o200 "Error if already exists."))
#+linux
(progn
(defconstant o_noctty #o400 "Don't become controlling terminal")
(defconstant o_sync #o10000 "Synchronous writes (on ext2)"))
#-(or hpux svr4 linux)
(progn
(defconstant o_creat #o1000 "Create if nonexistant flag.")
(defconstant o_trunc #o2000 "Truncate flag.")
(defconstant o_excl #o4000 "Error if already exists."))
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
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
(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))))))
1259
1260
1261
1262
1263
1264
1265
1266
1267
1268
1269
1270
1271
1272
1273
1274
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
1324
;;; 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
'#(0 50 75 110 134 150 200 300 600 1200 1800 2400 4800 9600 nil nil
57600 115200))
(defconstant tty-raw #-linux #o40 #+linux 1)
(defconstant tty-crmod #-linux #o20 #+linux 4)
(defconstant tty-echo #o10) ;; 8
(defconstant tty-lcase #-linux #o4 #+linux 2)
(defconstant tty-cbreak #-linux #o2 #+linux 64)
#-(or linux hpux)
(progn
(defconstant tty-icanon #o2)
(defconstant tty-icrnl #o400)
(defconstant tty-ocrnl #o10)
(defconstant veof 4)
(defconstant vintr 0)
#+freebsd
(progn
(defconstant tty-icanon #x100)
(defconstant tty-icrnl #x100)
(defconstant tty-ocrnl #x2)
(defconstant tty-ixon #x200)
(defconstant veof 0)
(defconstant vintr 8)
(defconstant vquit 9))
#+hpux
(progn
(defconstant vdsusp 21)
(defconstant vstart 14)
(defconstant vstop 15)
(defconstant vsusp 13)
(defconstant vmin 11)
(defconstant vtime 12)
(defconstant tcsaflush 2))
(defconstant vstart 8)
(defconstant vstop 9)
(defconstant vsusp 10)
(defconstant tcsaflush #-linux #x5410 #+linux 2))
#+freebsd
(progn
(defconstant vdsusp 11)
(defconstant vstart 12)
(defconstant vstop 13)
(defconstant vsusp 10)
(defconstant vmin 16)
(defconstant vtime 17)
(defconstant tcsaflush #x2))
#-(or svr4 linux)
(progn
(defconstant iocparm-mask #x7f) ; Freebsd: #x1fff ?
(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 #-linux 8 #+linux #x5481 (struct sgttyb) :out)
(define-ioctl-command TIOCSETP #\t #-linux 9 #+linux #x5482 (struct sgttyb) :in)
(define-ioctl-command TIOCFLUSH #\t #-linux 16 #+linux #x5489 int :in)
(define-ioctl-command TIOCSETC #\t #-linux 17 #+linux #x5484 (struct tchars) :in)
(define-ioctl-command TIOCGETC #\t #-linux 18 #+linux #x5483 (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)
(define-ioctl-command TIOCNOTTY #\t #-linux 113 #+linux #x5422 nil :void)
(define-ioctl-command TIOCSLTC #\t #-linux 117 #+linux #x5484 (struct ltchars) :in)
(define-ioctl-command TIOCGLTC #\t #-linux 116 #+linux #x5485 (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 nil))
(define-ioctl-command FIONREAD #\f #-linux 127 #+linux #x541B int :out)
(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))
1487
1488
1489
1490
1491
1492
1493
1494
1495
1496
1497
1498
1499
1500
1501
1502
1503
1504
1505
1506
1507
1508
1509
1510
1511
1512
1513
1514
1515
1516
1517
1518
1519
1520
1521
1522
1523
1524
1525
1526
1527
1528
1529
1530
1531
1532
1533
1534
1535
1536
1537
1538
1539
1540
1541
1542
1543
1544
(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 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.
(define-ioctl-command SIOCSPGRP #\s 8 int :in)
#+linux
(define-ioctl-command SIOCSPGRP #\s #x8904 int :in)
#+(or hpux freebsd linux)
(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)))))
1561
1562
1563
1564
1565
1566
1567
1568
1569
1570
1571
1572
1573
1574
1575
1576
1577
1578
1579
1580
1581
;;; 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)
#-(or svr4 FreeBSD) (slot ,buf 'st-atime)
#+svr4 (slot (slot ,buf 'st-atime) 'tv-sec)
#+FreeBSD (slot (slot ,buf 'st-atime) 'ts-sec)
#-(or svr4 FreeBSD)(slot ,buf 'st-mtime)
#+svr4 (slot (slot ,buf 'st-mtime) 'tv-sec)
#+FreeBSD(slot (slot ,buf 'st-mtime) 'ts-sec)
#-(or svr4 FreeBSD) (slot ,buf 'st-ctime)
#+svr4 (slot (slot ,buf 'st-ctime) 'tv-sec)
#+FreeBSD(slot (slot ,buf 'st-ctime) 'ts-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))
1603
1604
1605
1606
1607
1608
1609
1610
1611
1612
1613
1614
1615
1616
1617
1618
1619
1620
1621
1622
1623
1624
1625
1626
1627
1628
1629
1630
(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)))
(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))))
;; Requires call to tzset() in main.
;; Don't use this now: we
(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.
1725
1726
1727
1728
1729
1730
1731
1732
1733
1734
1735
1736
1737
1738
1739
1740
1741
1742
1743
1744
1745
1746
(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.
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
(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))
1796
1797
1798
1799
1800
1801
1802
1803
1804
1805
1806
1807
1808
1809
1810
1811
1812
1813
1814
1815
1816
1817
(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))
(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))))))
1883
1884
1885
1886
1887
1888
1889
1890
1891
1892
1893
1894
1895
1896
1897
1898
1899
1900
1901
1902
1903
1904
#+bsd
(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))
(fino (slot direct 'd-fileno)))
(declare (type (unsigned-byte 8) nlen)
(type (unsigned-byte 32) fino))
(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 string fino)))))))
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
1933
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
1959
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
(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