/usr/lib/s9fes/unix.scm is in scheme9 2010.11.13-2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 | ; Scheme 9 from Empty Space, Function Library
; By Nils M Holm, 2009-2010
; See the LICENSE file of the S9fES package for terms of use
;
; An interface to some Unix system services.
;
; (sys:change-mode integer string) ==> integer
; (sys:chmod string1 string2|integer) ==> unspecific
; (sys:chown string1 string2|integer1 string3|integer2) ==> unspecific
; (sys:creat string) ==> integer
; (sys:exit) ==> undefined
; (sys:group-name string) ==> string
; (sys:group-gid string) ==> integer
; (sys:kill integer) ==> unspecific
; (sys:lchown string1 string2|integer1 string3|integer2) ==> unspecific
; (sys:lstat-name string) ==> string
; (sys:lstat-size string) ==> integer
; (sys:lstat-uid string) ==> integer
; (sys:lstat-gid string) ==> integer
; (sys:lstat-mode string) ==> integer
; (sys:lstat-ctime string) ==> integer
; (sys:lstat-atime string) ==> integer
; (sys:lstat-mtime string) ==> integer
; (sys:lstat-dev string) ==> integer
; (sys:lstat-ino string) ==> integer
; (sys:lstat-nlink string) ==> integer
; (sys:mkdir string) ==> unspecific
; (sys:notify integer) ==> unspecific
; (sys:notify integer1 integer2) ==> unspecific
; (sys:stat-name string) ==> string
; (sys:stat-size string) ==> integer
; (sys:stat-uid string) ==> integer
; (sys:stat-gid string) ==> integer
; (sys:stat-mode string) ==> integer
; (sys:stat-ctime string) ==> integer
; (sys:stat-atime string) ==> integer
; (sys:stat-mtime string) ==> integer
; (sys:stat-dev string) ==> integer
; (sys:stat-ino string) ==> integer
; (sys:stat-nlink string) ==> integer
; (sys:time) ==> integer
; (sys:user-name string) ==> string
; (sys:user-uid string) ==> integer
; (sys:user-gid string) ==> integer
; (sys:user-gecos string) ==> string
; (sys:user-home string) ==> string
; (sys:user-shell string) ==> string
;
; (Example): (sys:getcwd) ==> "/u/home/nmh"
(require-extension sys-unix)
(load-from-library "bitwise-ops.scm")
(load-from-library "for-all.scm")
(load-from-library "string-split.scm")
(load-from-library "string-unsplit.scm")
(define sys:access-f-ok (sys:get-magic-value "F_OK"))
(define sys:access-x-ok (sys:get-magic-value "X_OK"))
(define sys:access-w-ok (sys:get-magic-value "W_OK"))
(define sys:access-r-ok (sys:get-magic-value "R_OK"))
(define sys:read-only (sys:get-magic-value "O_RDONLY"))
(define sys:write-only (sys:get-magic-value "O_WRONLY"))
(define sys:read+write (sys:get-magic-value "O_RDWR"))
(define old:creat sys:creat)
(define sys:creat
(let ((old:creat old:creat))
(lambda (file . mode)
(let ((mode (if (null? mode)
#o644
(car mode))))
(old:creat file mode)))))
(define sys:seek-set (sys:get-magic-value "SEEK_SET"))
(define sys:seek-cur (sys:get-magic-value "SEEK_CUR"))
(define sys:seek-end (sys:get-magic-value "SEEK_END"))
(define sys:sighup (sys:get-magic-value "SIGHUP"))
(define sys:sigint (sys:get-magic-value "SIGINT"))
(define sys:sigquit (sys:get-magic-value "SIGQUIT"))
(define sys:sigill (sys:get-magic-value "SIGILL"))
(define sys:sigtrap (sys:get-magic-value "SIGTRAP"))
(define sys:sigabrt (sys:get-magic-value "SIGABRT"))
(define sys:sigemt (sys:get-magic-value "SIGEMT"))
(define sys:sigfpe (sys:get-magic-value "SIGFPE"))
(define sys:sigkill (sys:get-magic-value "SIGKILL"))
(define sys:sigbus (sys:get-magic-value "SIGBUS"))
(define sys:sigsegv (sys:get-magic-value "SIGSEGV"))
(define sys:sigsys (sys:get-magic-value "SIGSYS"))
(define sys:sigpipe (sys:get-magic-value "SIGPIPE"))
(define sys:sigalrm (sys:get-magic-value "SIGALRM"))
(define sys:sigterm (sys:get-magic-value "SIGTERM"))
(define old:kill sys:kill)
(define sys:kill
(let ((old:kill old:kill))
(lambda (pid . signal)
(let ((signal (if (null? signal)
sys:sigterm
(car signal))))
(old:kill pid signal)))))
(define sys:notify sys:kill)
(define old:mkdir sys:mkdir)
(define sys:mkdir
(let ((old:mkdir old:mkdir))
(lambda (path . mode)
(let ((mode (if (null? mode)
#o755
(car mode))))
(old:mkdir path mode)))))
(define (stat-accessor stat tag)
(lambda (file)
(let ((s (stat file)))
(if s
(cdr (assq tag s))
(error "sys:stat-accessor: cannot stat" file)))))
(define sys:stat-name (stat-accessor sys:stat 'name))
(define sys:stat-size (stat-accessor sys:stat 'size))
(define sys:stat-uid (stat-accessor sys:stat 'uid))
(define sys:stat-gid (stat-accessor sys:stat 'gid))
(define sys:stat-mode (stat-accessor sys:stat 'mode))
(define sys:stat-ctime (stat-accessor sys:stat 'ctime))
(define sys:stat-atime (stat-accessor sys:stat 'atime))
(define sys:stat-mtime (stat-accessor sys:stat 'mtime))
(define sys:stat-dev (stat-accessor sys:stat 'dev))
(define sys:stat-ino (stat-accessor sys:stat 'ino))
(define sys:stat-nlink (stat-accessor sys:stat 'nlink))
(define sys:lstat-name (stat-accessor sys:lstat 'name))
(define sys:lstat-size (stat-accessor sys:lstat 'size))
(define sys:lstat-uid (stat-accessor sys:lstat 'uid))
(define sys:lstat-gid (stat-accessor sys:lstat 'gid))
(define sys:lstat-mode (stat-accessor sys:lstat 'mode))
(define sys:lstat-ctime (stat-accessor sys:lstat 'ctime))
(define sys:lstat-atime (stat-accessor sys:lstat 'atime))
(define sys:lstat-mtime (stat-accessor sys:lstat 'mtime))
(define sys:lstat-dev (stat-accessor sys:lstat 'dev))
(define sys:lstat-ino (stat-accessor sys:lstat 'ino))
(define sys:lstat-nlink (stat-accessor sys:lstat 'nlink))
(define sys:s-isuid (sys:get-magic-value "S_ISUID"))
(define sys:s-isgid (sys:get-magic-value "S_ISGID"))
(define sys:s-isvtx (sys:get-magic-value "S_ISVTX"))
(define sys:s-irwxu (sys:get-magic-value "S_IRWXU"))
(define sys:s-irusr (sys:get-magic-value "S_IRUSR"))
(define sys:s-iwusr (sys:get-magic-value "S_IWUSR"))
(define sys:s-ixusr (sys:get-magic-value "S_IXUSR"))
(define sys:s-irwxg (sys:get-magic-value "S_IRWXG"))
(define sys:s-irgrp (sys:get-magic-value "S_IRGRP"))
(define sys:s-iwgrp (sys:get-magic-value "S_IWGRP"))
(define sys:s-ixgrp (sys:get-magic-value "S_IXGRP"))
(define sys:s-irwxo (sys:get-magic-value "S_IRWXO"))
(define sys:s-iroth (sys:get-magic-value "S_IROTH"))
(define sys:s-iwoth (sys:get-magic-value "S_IWOTH"))
(define sys:s-ixoth (sys:get-magic-value "S_IXOTH"))
; Modifier may be
; - an integer representing a decimal mode, e.g. 511
; - a string representing an octal mode, e.g. "0755"
; - a string of the form "[ugoa][+-=][rwxst]", e.g. "a+rwx"
; - a sequence of the above, e.g. "a=rwx,go=rx,+t"
(define (sys:change-mode mode modifier)
(letrec
((b-or bitwise-or)
(suid sys:s-isuid)
(sgid sys:s-isgid)
(svtx sys:s-isvtx)
(rwxu sys:s-irwxu)
(rwxg sys:s-irwxg)
(rwxo sys:s-irwxo)
(str->mode
(lambda (s)
(letrec
((op #f)
(make-mode
(lambda (u g o m)
(if (char=? #\= op)
(let* ((new (if u
(bitwise-or
(bitwise-and
rwxu
(bitwise-shift-left m 6))
(bitwise-and m suid)
(bitwise-and mode #o77770077))
mode))
(new (if g
(bitwise-or
(bitwise-and
rwxg
(bitwise-shift-left m 3))
(if (zero? (bitwise-and m suid))
0
sgid)
(bitwise-and new #o77770707))
new))
(new (if o
(bitwise-or
(bitwise-and rwxo m)
(bitwise-and new #o77770770))
new))
(new (bitwise-or new (bitwise-and m svtx))))
new)
((if (char=? #\+ op)
bitwise-or
bitwise-and-c2)
mode
(bitwise-or (if u (bitwise-or
(bitwise-and
rwxu
(bitwise-shift-left m 6))
(bitwise-and m suid))
0)
(if g (bitwise-or
(bitwise-and
rwxg
(bitwise-shift-left m 3))
(if (zero? (bitwise-and m suid))
0
sgid))
0)
(if o (bitwise-and rwxo m) 0)
(bitwise-and m svtx)))))))
(let loop ((l (string->list s))
(u #f)
(g #f)
(o #f)
(m 0)
(b #f))
(cond
((null? l)
(if op (make-mode u g o m) #f))
((char=? #\, (car l))
(let ((new (if op (make-mode u g o m) #f)))
(if new
(begin (set! mode new)
(loop (cdr l) #f #f #f 0 #f))
#f)))
(else
(case (car l)
((#\u) (if b #f (loop (cdr l) #t g o m #f)))
((#\g) (if b #f (loop (cdr l) u #t o m #f)))
((#\o) (if b #f (loop (cdr l) u g #t m #f)))
((#\a) (if b #f (loop (cdr l) #t #t #t m #f)))
((#\r) (if b (loop (cdr l) u g o (b-or m 4) #t) #f))
((#\w) (if b (loop (cdr l) u g o (b-or m 2) #t) #f))
((#\x) (if b (loop (cdr l) u g o (b-or m 1) #t) #f))
((#\s) (if b (loop (cdr l) u g o (b-or m suid) #t) #f))
((#\t) (if b (loop (cdr l) u g o (b-or m svtx) #t) #f))
((#\+ #\- #\=)
(if b #f (begin (set! op (car l))
(loop (cdr l) u g o m #t))))
(else #f)))))))))
(cond ((integer? modifier)
modifier)
((string? modifier)
(if (and (> (string-length modifier) 0)
(char<=? #\0 (string-ref modifier 0) #\9))
(string->number modifier 8)
(let ((m (str->mode modifier)))
(if m m (error "sys:change-mode: bad modifier" modifier)))))
(else
(error "change-mode: expected string or integer, got"
modifier)))))
(define (do-chmod who chmod-proc stat-proc file modifier)
(let ((old-mode (stat-proc file)))
(if (not old-mode)
(error (string-append who ": no such file") file)
(let ((new-mode (sys:change-mode old-mode modifier)))
(chmod-proc file new-mode)))))
(define old:chmod sys:chmod)
(define sys:chmod
(let ((do-chmod do-chmod)
(old:chmod old:chmod))
(lambda (file modifier)
(do-chmod "sys:chmod" old:chmod sys:stat-mode file modifier))))
(define old:exit sys:exit)
(define sys:exit
(let ((old:exit old:exit))
(lambda code
(cond ((null? code)
(old:exit 0))
((and (null? (cdr code))
(integer? (car code))
(<= 0 (car code) 127))
(old:exit (car code)))
(else
(error "sys:exit: bad argument(s)" code))))))
(define (sys:time)
(car (sys:gettimeofday)))
(define (user-accessor who tag)
(lambda (x)
(let ((u (if (string? x)
(sys:getpwnam x)
(sys:getpwuid x))))
(if u
(cdr (assq tag u))
(error (string-append who ": no such user name or UID: " x))))))
(define sys:user-name (user-accessor "sys:user-name" 'name))
(define sys:user-uid (user-accessor "sys:user-uid" 'uid))
(define sys:user-gid (user-accessor "sys:user-gid" 'gid))
(define sys:user-gecos (user-accessor "sys:user-gecos" 'gecos))
(define sys:user-home (user-accessor "sys:user-home" 'home))
(define sys:user-shell (user-accessor "sys:user-shell" 'shell))
(define (group-accessor who tag)
(lambda (x)
(let ((g (if (string? x)
(sys:getgrnam x)
(sys:getgrgid x))))
(if g
(cdr (assq tag g))
(error (string-append who ": no such group name or GID: " x))))))
(define sys:group-name (group-accessor "sys:group-name" 'name))
(define sys:group-gid (group-accessor "sys:group-gid" 'gid))
(define (do-chown proc file user group)
(let* ((s (sys:stat file))
(u (if s
(cdr (assq 'uid s))
(error "chown: cannot stat" file)))
(g (cdr (assq 'gid s)))
(new-u (cond ((integer? user)
user)
((string? user)
(let ((u (sys:user-uid user)))
(if u u (error "chown: no such user" user))))
((not user)
u)
(else
(error "chown: bad user name/ID" user))))
(new-g (cond ((integer? group)
group)
((string? group)
(let ((g (sys:group-gid group)))
(if g g (error "chown: no such group" group))))
((not group)
g)
(else
(error "chown: bad group name/ID" group)))))
(proc file new-u new-g)))
(define old:chown sys:chown)
(define sys:chown
(let ((do-chown do-chown)
(old:chown old:chown))
(lambda (file user group)
(do-chown old:chown file user group))))
(define old:lchown sys:lchown)
(define sys:lchown
(let ((do-chown do-chown)
(old:lchown old:lchown))
(lambda (file user group)
(do-chown old:lchown file user group))))
(define (char-ready? . port)
(let ((port (if (null? port)
(current-input-port)
(car port))))
(and (sys:select '(0 0) (list (sys:fileno port)) '())
#t)))
(define (sys-unix:sys-unix) #t)
|