source: code/trunk/vendor/modernc.org/libc/libc_unix.go@ 822

Last change on this file since 822 was 822, checked in by yakumo.izuru, 22 months ago

Prefer immortal.run over runit and rc.d, use vendored modules
for convenience.

Signed-off-by: Izuru Yakumo <yakumo.izuru@…>
File size: 21.6 KB
Line 
1// Copyright 2020 The Libc Authors. All rights reserved.
2// Use of this source code is governed by a BSD-style
3// license that can be found in the LICENSE file.
4
5//go:build linux || darwin || freebsd || netbsd || openbsd
6// +build linux darwin freebsd netbsd openbsd
7
8package libc // import "modernc.org/libc"
9
10import (
11 "bufio"
12 "io/ioutil"
13 "math"
14 "math/rand"
15 "os"
16 gosignal "os/signal"
17 "reflect"
18 "strconv"
19 "strings"
20 "sync"
21 "syscall"
22 "time"
23 "unsafe"
24
25 guuid "github.com/google/uuid"
26 "golang.org/x/sys/unix"
27 "modernc.org/libc/errno"
28 "modernc.org/libc/grp"
29 "modernc.org/libc/poll"
30 "modernc.org/libc/pwd"
31 "modernc.org/libc/signal"
32 "modernc.org/libc/stdio"
33 "modernc.org/libc/stdlib"
34 "modernc.org/libc/sys/types"
35 ctime "modernc.org/libc/time"
36)
37
38var staticGetpwnam pwd.Passwd
39
40func init() {
41 atExit = append(atExit, func() { closePasswd(&staticGetpwnam) })
42}
43
44// sighandler_t signal(int signum, sighandler_t handler);
45func Xsignal(t *TLS, signum int32, handler uintptr) uintptr { //TODO use sigaction?
46 signalsMu.Lock()
47
48 defer signalsMu.Unlock()
49
50 r := signals[signum]
51 signals[signum] = handler
52 switch handler {
53 case signal.SIG_DFL:
54 panic(todo("%v %#x", syscall.Signal(signum), handler))
55 case signal.SIG_IGN:
56 switch r {
57 case signal.SIG_DFL:
58 gosignal.Ignore(syscall.Signal(signum)) //TODO
59 case signal.SIG_IGN:
60 gosignal.Ignore(syscall.Signal(signum))
61 default:
62 panic(todo("%v %#x", syscall.Signal(signum), handler))
63 }
64 default:
65 switch r {
66 case signal.SIG_DFL:
67 c := make(chan os.Signal, 1)
68 gosignal.Notify(c, syscall.Signal(signum))
69 go func() { //TODO mechanism to stop/cancel
70 for {
71 <-c
72 var f func(*TLS, int32)
73 *(*uintptr)(unsafe.Pointer(&f)) = handler
74 tls := NewTLS()
75 f(tls, signum)
76 tls.Close()
77 }
78 }()
79 case signal.SIG_IGN:
80 panic(todo("%v %#x", syscall.Signal(signum), handler))
81 default:
82 panic(todo("%v %#x", syscall.Signal(signum), handler))
83 }
84 }
85 return r
86}
87
88// void rewind(FILE *stream);
89func Xrewind(t *TLS, stream uintptr) {
90 Xfseek(t, stream, 0, stdio.SEEK_SET)
91}
92
93// int putchar(int c);
94func Xputchar(t *TLS, c int32) int32 {
95 if _, err := write([]byte{byte(c)}); err != nil {
96 return stdio.EOF
97 }
98
99 return int32(c)
100}
101
102// int gethostname(char *name, size_t len);
103func Xgethostname(t *TLS, name uintptr, slen types.Size_t) int32 {
104 if slen < 0 {
105 t.setErrno(errno.EINVAL)
106 return -1
107 }
108
109 if slen == 0 {
110 return 0
111 }
112
113 s, err := os.Hostname()
114 if err != nil {
115 panic(todo(""))
116 }
117
118 n := len(s)
119 if len(s) >= int(slen) {
120 n = int(slen) - 1
121 }
122 sh := (*reflect.StringHeader)(unsafe.Pointer(&s))
123 copy((*RawMem)(unsafe.Pointer(name))[:n:n], (*RawMem)(unsafe.Pointer(sh.Data))[:n:n])
124 *(*byte)(unsafe.Pointer(name + uintptr(n))) = 0
125 return 0
126}
127
128// int remove(const char *pathname);
129func Xremove(t *TLS, pathname uintptr) int32 {
130 panic(todo(""))
131}
132
133// long pathconf(const char *path, int name);
134func Xpathconf(t *TLS, path uintptr, name int32) long {
135 panic(todo(""))
136}
137
138// ssize_t recvfrom(int sockfd, void *buf, size_t len, int flags, struct sockaddr *src_addr, socklen_t *addrlen);
139func Xrecvfrom(t *TLS, sockfd int32, buf uintptr, len types.Size_t, flags int32, src_addr, addrlen uintptr) types.Ssize_t {
140 panic(todo(""))
141}
142
143// ssize_t sendto(int sockfd, const void *buf, size_t len, int flags, const struct sockaddr *dest_addr, socklen_t addrlen);
144func Xsendto(t *TLS, sockfd int32, buf uintptr, len types.Size_t, flags int32, src_addr uintptr, addrlen socklen_t) types.Ssize_t {
145 panic(todo(""))
146}
147
148// void srand48(long int seedval);
149func Xsrand48(t *TLS, seedval long) {
150 panic(todo(""))
151}
152
153// long int lrand48(void);
154func Xlrand48(t *TLS) long {
155 panic(todo(""))
156}
157
158// ssize_t sendmsg(int sockfd, const struct msghdr *msg, int flags);
159func Xsendmsg(t *TLS, sockfd int32, msg uintptr, flags int32) types.Ssize_t {
160 panic(todo(""))
161}
162
163// int poll(struct pollfd *fds, nfds_t nfds, int timeout);
164func Xpoll(t *TLS, fds uintptr, nfds poll.Nfds_t, timeout int32) int32 {
165 if nfds == 0 {
166 panic(todo(""))
167 }
168
169 // if dmesgs {
170 // dmesg("%v: %#x %v %v, %+v", origin(1), fds, nfds, timeout, (*[1000]unix.PollFd)(unsafe.Pointer(fds))[:nfds:nfds])
171 // }
172 n, err := unix.Poll((*[1000]unix.PollFd)(unsafe.Pointer(fds))[:nfds:nfds], int(timeout))
173 // if dmesgs {
174 // dmesg("%v: %v %v", origin(1), n, err)
175 // }
176 if err != nil {
177 t.setErrno(err)
178 return -1
179 }
180
181 return int32(n)
182}
183
184// ssize_t recvmsg(int sockfd, struct msghdr *msg, int flags);
185func Xrecvmsg(t *TLS, sockfd int32, msg uintptr, flags int32) types.Ssize_t {
186 n, _, err := unix.Syscall(unix.SYS_RECVMSG, uintptr(sockfd), msg, uintptr(flags))
187 if err != 0 {
188 t.setErrno(err)
189 return -1
190 }
191
192 return types.Ssize_t(n)
193}
194
195// struct cmsghdr *CMSG_NXTHDR(struct msghdr *msgh, struct cmsghdr *cmsg);
196func X__cmsg_nxthdr(t *TLS, msgh, cmsg uintptr) uintptr {
197 panic(todo(""))
198}
199
200// wchar_t *wcschr(const wchar_t *wcs, wchar_t wc);
201func Xwcschr(t *TLS, wcs uintptr, wc wchar_t) wchar_t {
202 panic(todo(""))
203}
204
205// gid_t getegid(void);
206func Xgetegid(t *TLS) types.Gid_t {
207 panic(todo(""))
208}
209
210// gid_t getgid(void);
211func Xgetgid(t *TLS) types.Gid_t {
212 panic(todo(""))
213}
214
215// void *shmat(int shmid, const void *shmaddr, int shmflg);
216func Xshmat(t *TLS, shmid int32, shmaddr uintptr, shmflg int32) uintptr {
217 panic(todo(""))
218}
219
220// int shmctl(int shmid, int cmd, struct shmid_ds *buf);
221func Xshmctl(t *TLS, shmid, cmd int32, buf uintptr) int32 {
222 panic(todo(""))
223}
224
225// int shmdt(const void *shmaddr);
226func Xshmdt(t *TLS, shmaddr uintptr) int32 {
227 panic(todo(""))
228}
229
230// int getresuid(uid_t *ruid, uid_t *euid, uid_t *suid);
231func Xgetresuid(t *TLS, ruid, euid, suid uintptr) int32 {
232 panic(todo(""))
233}
234
235// int getresgid(gid_t *rgid, gid_t *egid, gid_t *sgid);
236func Xgetresgid(t *TLS, rgid, egid, sgid uintptr) int32 {
237 panic(todo(""))
238}
239
240// FILE *tmpfile(void);
241func Xtmpfile(t *TLS) uintptr {
242 f, err := ioutil.TempFile("", "tmpfile-")
243 if err != nil {
244 t.setErrno(err)
245 return 0
246 }
247
248 cf := newFile(t, int32(f.Fd()))
249 AtExit(func() {
250 nm := f.Name()
251 file(cf).close(t)
252 os.Remove(nm)
253 })
254
255 return cf
256}
257
258// FILE *fdopen(int fd, const char *mode);
259func Xfdopen(t *TLS, fd int32, mode uintptr) uintptr {
260 m := strings.ReplaceAll(GoString(mode), "b", "")
261 switch m {
262 case
263 "a",
264 "a+",
265 "r",
266 "r+",
267 "w",
268 "w+":
269 default:
270 t.setErrno(errno.EINVAL)
271 return 0
272 }
273
274 if p := newFile(t, fd); p != 0 {
275 return p
276 }
277
278 t.setErrno(errno.EINVAL)
279 return 0
280}
281
282// struct passwd *getpwnam(const char *name);
283func Xgetpwnam(t *TLS, name uintptr) uintptr {
284 f, err := os.Open("/etc/passwd")
285 if err != nil {
286 panic(todo("", err))
287 }
288
289 defer f.Close()
290
291 sname := GoString(name)
292 sc := bufio.NewScanner(f)
293 for sc.Scan() {
294 s := strings.TrimSpace(sc.Text())
295 if s == "" || strings.HasPrefix(s, "#") {
296 continue
297 }
298
299 // eg. "root:x:0:0:root:/root:/bin/bash"
300 a := strings.Split(s, ":")
301 if len(a) < 7 {
302 panic(todo(""))
303 }
304
305 if a[0] == sname {
306 uid, err := strconv.Atoi(a[2])
307 if err != nil {
308 panic(todo(""))
309 }
310
311 gid, err := strconv.Atoi(a[3])
312 if err != nil {
313 panic(todo(""))
314 }
315
316 closePasswd(&staticGetpwnam)
317 gecos := a[4]
318 if strings.Contains(gecos, ",") {
319 a := strings.Split(gecos, ",")
320 gecos = a[0]
321 }
322 initPasswd(t, &staticGetpwnam, a[0], a[1], uint32(uid), uint32(gid), gecos, a[5], a[6])
323 return uintptr(unsafe.Pointer(&staticGetpwnam))
324 }
325 }
326
327 if sc.Err() != nil {
328 panic(todo(""))
329 }
330
331 return 0
332}
333
334// int getpwnam_r(char *name, struct passwd *pwd, char *buf, size_t buflen, struct passwd **result);
335func Xgetpwnam_r(t *TLS, name, cpwd, buf uintptr, buflen types.Size_t, result uintptr) int32 {
336 f, err := os.Open("/etc/passwd")
337 if err != nil {
338 panic(todo("", err))
339 }
340
341 defer f.Close()
342
343 sname := GoString(name)
344 sc := bufio.NewScanner(f)
345 for sc.Scan() {
346 s := strings.TrimSpace(sc.Text())
347 if s == "" || strings.HasPrefix(s, "#") {
348 continue
349 }
350
351 // eg. "root:x:0:0:root:/root:/bin/bash"
352 a := strings.Split(s, ":")
353 if len(a) < 7 {
354 panic(todo("%q", s))
355 }
356
357 if a[0] == sname {
358 uid, err := strconv.Atoi(a[2])
359 if err != nil {
360 panic(todo(""))
361 }
362
363 gid, err := strconv.Atoi(a[3])
364 if err != nil {
365 panic(todo(""))
366 }
367
368 gecos := a[4]
369 if strings.Contains(gecos, ",") {
370 a := strings.Split(gecos, ",")
371 gecos = a[0]
372 }
373 var v pwd.Passwd
374 if initPasswd2(t, buf, buflen, &v, a[0], a[1], uint32(uid), uint32(gid), gecos, a[5], a[6]) {
375 *(*pwd.Passwd)(unsafe.Pointer(cpwd)) = v
376 *(*uintptr)(unsafe.Pointer(result)) = cpwd
377 return 0
378 }
379
380 *(*uintptr)(unsafe.Pointer(result)) = 0
381 return errno.ERANGE
382 }
383 }
384
385 if sc.Err() != nil {
386 panic(todo(""))
387 }
388
389 *(*uintptr)(unsafe.Pointer(result)) = 0
390 return 0
391}
392
393func init() {
394 atExit = append(atExit, func() { closeGroup(&staticGetgrgid) })
395}
396
397var staticGetgrgid grp.Group
398
399// struct group *getgrgid(gid_t gid);
400func Xgetgrgid(t *TLS, gid uint32) uintptr {
401 f, err := os.Open("/etc/group")
402 if err != nil {
403 panic(todo(""))
404 }
405
406 defer f.Close()
407
408 sid := strconv.Itoa(int(gid))
409 sc := bufio.NewScanner(f)
410 for sc.Scan() {
411 s := strings.TrimSpace(sc.Text())
412 if s == "" || strings.HasPrefix(s, "#") {
413 continue
414 }
415
416 // eg. "root:x:0:"
417 a := strings.Split(s, ":")
418 if len(a) < 4 {
419 panic(todo("%q", s))
420 }
421
422 if a[2] == sid {
423 closeGroup(&staticGetgrgid)
424 var names []string
425 if a[3] != "" {
426 names = strings.Split(a[3], ",")
427 }
428 initGroup(t, &staticGetgrgid, a[0], a[1], gid, names)
429 return uintptr(unsafe.Pointer(&staticGetgrgid))
430 }
431 }
432
433 if sc.Err() != nil {
434 panic(todo(""))
435 }
436
437 return 0
438}
439
440// int getgrgid_r(gid_t gid, struct group *grp, char *buf, size_t buflen, struct group **result);
441func Xgetgrgid_r(t *TLS, gid uint32, pGrp, buf uintptr, buflen types.Size_t, result uintptr) int32 {
442 f, err := os.Open("/etc/group")
443 if err != nil {
444 panic(todo(""))
445 }
446
447 defer f.Close()
448
449 sid := strconv.Itoa(int(gid))
450 sc := bufio.NewScanner(f)
451 for sc.Scan() {
452 s := strings.TrimSpace(sc.Text())
453 if s == "" || strings.HasPrefix(s, "#") {
454 continue
455 }
456
457 // eg. "root:x:0:"
458 a := strings.Split(s, ":")
459 if len(a) < 4 {
460 panic(todo("%q", s))
461 }
462
463 if a[2] == sid {
464 var names []string
465 if a[3] != "" {
466 names = strings.Split(a[3], ",")
467 }
468 var x grp.Group
469 if initGroup2(buf, buflen, &x, a[0], a[1], gid, names) {
470 *(*grp.Group)(unsafe.Pointer(pGrp)) = x
471 *(*uintptr)(unsafe.Pointer(result)) = pGrp
472 return 0
473 }
474
475 *(*uintptr)(unsafe.Pointer(result)) = 0
476 return 0
477 }
478 }
479
480 if sc.Err() != nil {
481 panic(todo(""))
482 }
483
484 *(*uintptr)(unsafe.Pointer(result)) = 0
485 return 0
486}
487
488func initPasswd2(t *TLS, buf uintptr, buflen types.Size_t, p *pwd.Passwd, name, pwd string, uid, gid uint32, gecos, dir, shell string) bool {
489 p.Fpw_name, buf, buflen = bufString(buf, buflen, name)
490 if buf == 0 {
491 return false
492 }
493
494 p.Fpw_passwd, buf, buflen = bufString(buf, buflen, pwd)
495 if buf == 0 {
496 return false
497 }
498
499 p.Fpw_uid = uid
500 p.Fpw_gid = gid
501 if buf == 0 {
502 return false
503 }
504
505 p.Fpw_gecos, buf, buflen = bufString(buf, buflen, gecos)
506 if buf == 0 {
507 return false
508 }
509
510 p.Fpw_dir, buf, buflen = bufString(buf, buflen, dir)
511 if buf == 0 {
512 return false
513 }
514
515 p.Fpw_shell, buf, buflen = bufString(buf, buflen, shell)
516 if buf == 0 {
517 return false
518 }
519
520 return true
521}
522
523func bufString(buf uintptr, buflen types.Size_t, s string) (uintptr, uintptr, types.Size_t) {
524 buf0 := buf
525 rq := len(s) + 1
526 if rq > int(buflen) {
527 return 0, 0, 0
528 }
529
530 copy((*RawMem)(unsafe.Pointer(buf))[:len(s):len(s)], s)
531 buf += uintptr(len(s))
532 *(*byte)(unsafe.Pointer(buf)) = 0
533 return buf0, buf + 1, buflen - types.Size_t(rq)
534}
535
536func closeGroup(p *grp.Group) {
537 Xfree(nil, p.Fgr_name)
538 Xfree(nil, p.Fgr_passwd)
539 if p := p.Fgr_mem; p != 0 {
540 for {
541 q := *(*uintptr)(unsafe.Pointer(p))
542 if q == 0 {
543 break
544 }
545
546 Xfree(nil, q)
547 p += unsafe.Sizeof(uintptr(0))
548 }
549 }
550 *p = grp.Group{}
551}
552
553func initGroup(t *TLS, p *grp.Group, name, pwd string, gid uint32, names []string) {
554 p.Fgr_name = cString(t, name)
555 p.Fgr_passwd = cString(t, pwd)
556 p.Fgr_gid = gid
557 a := Xcalloc(t, 1, types.Size_t(unsafe.Sizeof(uintptr(0)))*types.Size_t((len(names)+1)))
558 if a == 0 {
559 panic("OOM")
560 }
561
562 for p := a; len(names) != 0; p += unsafe.Sizeof(uintptr(0)) {
563 *(*uintptr)(unsafe.Pointer(p)) = cString(t, names[0])
564 names = names[1:]
565 }
566 p.Fgr_mem = a
567}
568
569func initGroup2(buf uintptr, buflen types.Size_t, p *grp.Group, name, pwd string, gid uint32, names []string) bool {
570 p.Fgr_name, buf, buflen = bufString(buf, buflen, name)
571 if buf == 0 {
572 return false
573 }
574
575 p.Fgr_passwd, buf, buflen = bufString(buf, buflen, pwd)
576 if buf == 0 {
577 return false
578 }
579
580 p.Fgr_gid = gid
581 rq := unsafe.Sizeof(uintptr(0)) * uintptr(len(names)+1)
582 if rq > uintptr(buflen) {
583 return false
584 }
585
586 a := buf
587 buf += rq
588 for ; len(names) != 0; buf += unsafe.Sizeof(uintptr(0)) {
589 if len(names[0])+1 > int(buflen) {
590 return false
591 }
592
593 *(*uintptr)(unsafe.Pointer(buf)), buf, buflen = bufString(buf, buflen, names[0])
594 names = names[1:]
595 }
596 *(*uintptr)(unsafe.Pointer(buf)) = 0
597 p.Fgr_mem = a
598 return true
599}
600
601func init() {
602 atExit = append(atExit, func() { closeGroup(&staticGetgrgid) })
603}
604
605var staticGetpwuid pwd.Passwd
606
607func init() {
608 atExit = append(atExit, func() { closePasswd(&staticGetpwuid) })
609}
610
611func closePasswd(p *pwd.Passwd) {
612 Xfree(nil, p.Fpw_name)
613 Xfree(nil, p.Fpw_passwd)
614 Xfree(nil, p.Fpw_gecos)
615 Xfree(nil, p.Fpw_dir)
616 Xfree(nil, p.Fpw_shell)
617 *p = pwd.Passwd{}
618}
619
620var staticGetgrnam grp.Group
621
622func init() {
623 atExit = append(atExit, func() { closeGroup(&staticGetgrnam) })
624}
625
626// struct passwd *getpwuid(uid_t uid);
627func Xgetpwuid(t *TLS, uid uint32) uintptr {
628 f, err := os.Open("/etc/passwd")
629 if err != nil {
630 panic(todo("", err))
631 }
632
633 defer f.Close()
634
635 sid := strconv.Itoa(int(uid))
636 sc := bufio.NewScanner(f)
637 for sc.Scan() {
638 s := strings.TrimSpace(sc.Text())
639 if len(s) == 0 || strings.HasPrefix(s, "#") {
640 continue
641 }
642
643 // eg. "root:x:0:0:root:/root:/bin/bash"
644 a := strings.Split(s, ":")
645 if len(a) < 7 {
646 panic(todo("%q", s))
647 }
648
649 if a[2] == sid {
650 uid, err := strconv.Atoi(a[2])
651 if err != nil {
652 panic(todo(""))
653 }
654
655 gid, err := strconv.Atoi(a[3])
656 if err != nil {
657 panic(todo(""))
658 }
659
660 closePasswd(&staticGetpwuid)
661 gecos := a[4]
662 if strings.Contains(gecos, ",") {
663 a := strings.Split(gecos, ",")
664 gecos = a[0]
665 }
666 initPasswd(t, &staticGetpwuid, a[0], a[1], uint32(uid), uint32(gid), gecos, a[5], a[6])
667 return uintptr(unsafe.Pointer(&staticGetpwuid))
668 }
669 }
670
671 if sc.Err() != nil {
672 panic(todo(""))
673 }
674
675 return 0
676}
677
678func initPasswd(t *TLS, p *pwd.Passwd, name, pwd string, uid, gid uint32, gecos, dir, shell string) {
679 p.Fpw_name = cString(t, name)
680 p.Fpw_passwd = cString(t, pwd)
681 p.Fpw_uid = uid
682 p.Fpw_gid = gid
683 p.Fpw_gecos = cString(t, gecos)
684 p.Fpw_dir = cString(t, dir)
685 p.Fpw_shell = cString(t, shell)
686}
687
688// struct group *getgrnam(const char *name);
689func Xgetgrnam(t *TLS, name uintptr) uintptr {
690 f, err := os.Open("/etc/group")
691 if err != nil {
692 panic(todo(""))
693 }
694
695 defer f.Close()
696
697 sname := GoString(name)
698 sc := bufio.NewScanner(f)
699 for sc.Scan() {
700 s := strings.TrimSpace(sc.Text())
701 if len(s) == 0 || strings.HasPrefix(s, "#") {
702 continue
703 }
704
705 // eg. "root:x:0:"
706 a := strings.Split(s, ":")
707 if len(a) < 4 {
708 panic(todo("%q", s))
709 }
710
711 if a[0] == sname {
712 closeGroup(&staticGetgrnam)
713 gid, err := strconv.Atoi(a[2])
714 if err != nil {
715 panic(todo(""))
716 }
717
718 var names []string
719 if a[3] != "" {
720 names = strings.Split(a[3], ",")
721 }
722 initGroup(t, &staticGetgrnam, a[0], a[1], uint32(gid), names)
723 return uintptr(unsafe.Pointer(&staticGetgrnam))
724 }
725 }
726
727 if sc.Err() != nil {
728 panic(todo(""))
729 }
730
731 return 0
732}
733
734// int getgrnam_r(const char *name, struct group *grp, char *buf, size_t buflen, struct group **result);
735func Xgetgrnam_r(t *TLS, name, pGrp, buf uintptr, buflen types.Size_t, result uintptr) int32 {
736 f, err := os.Open("/etc/group")
737 if err != nil {
738 panic(todo(""))
739 }
740
741 defer f.Close()
742
743 sname := GoString(name)
744 sc := bufio.NewScanner(f)
745 for sc.Scan() {
746 s := strings.TrimSpace(sc.Text())
747 if len(s) == 0 || strings.HasPrefix(s, "#") {
748 continue
749 }
750
751 // eg. "root:x:0:"
752 a := strings.Split(s, ":")
753 if len(a) < 4 {
754 panic(todo("%q", s))
755 }
756
757 if a[0] == sname {
758 gid, err := strconv.Atoi(a[2])
759 if err != nil {
760 panic(todo(""))
761 }
762
763 var names []string
764 if a[3] != "" {
765 names = strings.Split(a[3], ",")
766 }
767 var x grp.Group
768 if initGroup2(buf, buflen, &x, a[0], a[1], uint32(gid), names) {
769 *(*grp.Group)(unsafe.Pointer(pGrp)) = x
770 *(*uintptr)(unsafe.Pointer(result)) = pGrp
771 return 0
772 }
773
774 *(*uintptr)(unsafe.Pointer(result)) = 0
775 return 0
776 }
777 }
778
779 if sc.Err() != nil {
780 panic(todo(""))
781 }
782
783 *(*uintptr)(unsafe.Pointer(result)) = 0
784 return 0
785}
786
787// int getpwuid_r(uid_t uid, struct passwd *pwd, char *buf, size_t buflen, struct passwd **result);
788func Xgetpwuid_r(t *TLS, uid types.Uid_t, cpwd, buf uintptr, buflen types.Size_t, result uintptr) int32 {
789 f, err := os.Open("/etc/passwd")
790 if err != nil {
791 panic(todo("", err))
792 }
793
794 defer f.Close()
795
796 sid := strconv.Itoa(int(uid))
797 sc := bufio.NewScanner(f)
798 for sc.Scan() {
799 s := strings.TrimSpace(sc.Text())
800 if len(s) == 0 || strings.HasPrefix(s, "#") {
801 continue
802 }
803
804 // eg. "root:x:0:0:root:/root:/bin/bash"
805 a := strings.Split(s, ":")
806 if len(a) < 7 {
807 panic(todo("%q", s))
808 }
809
810 if a[2] == sid {
811 uid, err := strconv.Atoi(a[2])
812 if err != nil {
813 panic(todo(""))
814 }
815
816 gid, err := strconv.Atoi(a[3])
817 if err != nil {
818 panic(todo(""))
819 }
820
821 gecos := a[4]
822 if strings.Contains(gecos, ",") {
823 a := strings.Split(gecos, ",")
824 gecos = a[0]
825 }
826 var v pwd.Passwd
827 if initPasswd2(t, buf, buflen, &v, a[0], a[1], uint32(uid), uint32(gid), gecos, a[5], a[6]) {
828 *(*pwd.Passwd)(unsafe.Pointer(cpwd)) = v
829 *(*uintptr)(unsafe.Pointer(result)) = cpwd
830 return 0
831 }
832
833 *(*uintptr)(unsafe.Pointer(result)) = 0
834 return errno.ERANGE
835 }
836 }
837
838 if sc.Err() != nil {
839 panic(todo(""))
840 }
841
842 *(*uintptr)(unsafe.Pointer(result)) = 0
843 return 0
844}
845
846// int mkostemp(char *template, int flags);
847func Xmkostemp(t *TLS, template uintptr, flags int32) int32 {
848 len := uintptr(Xstrlen(t, template))
849 x := template + uintptr(len-6)
850 for i := uintptr(0); i < 6; i++ {
851 if *(*byte)(unsafe.Pointer(x + i)) != 'X' {
852 t.setErrno(errno.EINVAL)
853 return -1
854 }
855 }
856
857 fd, err := tempFile(template, x, flags)
858 if err != nil {
859 t.setErrno(err)
860 return -1
861 }
862
863 return int32(fd)
864}
865
866// void uuid_generate_random(uuid_t out);
867func Xuuid_generate_random(t *TLS, out uintptr) {
868 x := guuid.New()
869 copy((*RawMem)(unsafe.Pointer(out))[:], x[:])
870}
871
872// void uuid_unparse(uuid_t uu, char *out);
873func Xuuid_unparse(t *TLS, uu, out uintptr) {
874 s := (*guuid.UUID)(unsafe.Pointer(uu)).String()
875 copy((*RawMem)(unsafe.Pointer(out))[:], s)
876 *(*byte)(unsafe.Pointer(out + uintptr(len(s)))) = 0
877}
878
879var staticRandomData = &rand.Rand{}
880
881// char *initstate(unsigned seed, char *state, size_t size);
882func Xinitstate(t *TLS, seed uint32, statebuf uintptr, statelen types.Size_t) uintptr {
883 staticRandomData = rand.New(rand.NewSource(int64(seed)))
884 return 0
885}
886
887// char *setstate(const char *state);
888func Xsetstate(t *TLS, state uintptr) uintptr {
889 t.setErrno(errno.EINVAL) //TODO
890 return 0
891}
892
893// The initstate_r() function is like initstate(3) except that it initializes
894// the state in the object pointed to by buf, rather than initializing the
895// global state variable. Before calling this function, the buf.state field
896// must be initialized to NULL. The initstate_r() function records a pointer
897// to the statebuf argument inside the structure pointed to by buf. Thus,
898// state‐ buf should not be deallocated so long as buf is still in use. (So,
899// statebuf should typically be allocated as a static variable, or allocated on
900// the heap using malloc(3) or similar.)
901//
902// char *initstate_r(unsigned int seed, char *statebuf, size_t statelen, struct random_data *buf);
903func Xinitstate_r(t *TLS, seed uint32, statebuf uintptr, statelen types.Size_t, buf uintptr) int32 {
904 if buf == 0 {
905 panic(todo(""))
906 }
907
908 randomDataMu.Lock()
909
910 defer randomDataMu.Unlock()
911
912 randomData[buf] = rand.New(rand.NewSource(int64(seed)))
913 return 0
914}
915
916var (
917 randomData = map[uintptr]*rand.Rand{}
918 randomDataMu sync.Mutex
919)
920
921// int mkstemps(char *template, int suffixlen);
922func Xmkstemps(t *TLS, template uintptr, suffixlen int32) int32 {
923 return Xmkstemps64(t, template, suffixlen)
924}
925
926// int mkstemps(char *template, int suffixlen);
927func Xmkstemps64(t *TLS, template uintptr, suffixlen int32) int32 {
928 len := uintptr(Xstrlen(t, template))
929 x := template + uintptr(len-6) - uintptr(suffixlen)
930 for i := uintptr(0); i < 6; i++ {
931 if *(*byte)(unsafe.Pointer(x + i)) != 'X' {
932 t.setErrno(errno.EINVAL)
933 return -1
934 }
935 }
936
937 fd, err := tempFile(template, x, 0)
938 if err != nil {
939 t.setErrno(err)
940 return -1
941 }
942
943 return int32(fd)
944}
945
946// int mkstemp(char *template);
947func Xmkstemp(t *TLS, template uintptr) int32 {
948 return Xmkstemp64(t, template)
949}
950
951// int mkstemp(char *template);
952func Xmkstemp64(t *TLS, template uintptr) int32 {
953 return Xmkstemps64(t, template, 0)
954}
955
956// int random_r(struct random_data *buf, int32_t *result);
957func Xrandom_r(t *TLS, buf, result uintptr) int32 {
958 randomDataMu.Lock()
959
960 defer randomDataMu.Unlock()
961
962 mr := randomData[buf]
963 if stdlib.RAND_MAX != math.MaxInt32 {
964 panic(todo(""))
965 }
966 *(*int32)(unsafe.Pointer(result)) = mr.Int31()
967 return 0
968}
969
970// int strerror_r(int errnum, char *buf, size_t buflen);
971func Xstrerror_r(t *TLS, errnum int32, buf uintptr, buflen size_t) int32 {
972 panic(todo(""))
973}
974
975// void endpwent(void);
976func Xendpwent(t *TLS) {
977 // nop
978}
979
980var ctimeStaticBuf [32]byte
981
982// char *ctime(const time_t *timep);
983func Xctime(t *TLS, timep uintptr) uintptr {
984 return Xctime_r(t, timep, uintptr(unsafe.Pointer(&ctimeStaticBuf[0])))
985}
986
987// char *ctime_r(const time_t *timep, char *buf);
988func Xctime_r(t *TLS, timep, buf uintptr) uintptr {
989 ut := *(*ctime.Time_t)(unsafe.Pointer(timep))
990 tm := time.Unix(int64(ut), 0).Local()
991 s := tm.Format(time.ANSIC) + "\n\x00"
992 copy((*RawMem)(unsafe.Pointer(buf))[:26:26], s)
993 return buf
994}
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