GoToSocial/vendor/modernc.org/libc/libc_unix.go

995 lines
22 KiB
Go
Raw Blame History

This file contains ambiguous Unicode characters

This file contains Unicode characters that might be confused with other characters. If you think that this is intentional, you can safely ignore this warning. Use the Escape button to reveal them.

// Copyright 2020 The Libc Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
//go:build linux || darwin || freebsd || netbsd || openbsd
// +build linux darwin freebsd netbsd openbsd
package libc // import "modernc.org/libc"
import (
"bufio"
"io/ioutil"
"math"
"math/rand"
"os"
gosignal "os/signal"
"reflect"
"strconv"
"strings"
"sync"
"syscall"
"time"
"unsafe"
guuid "github.com/google/uuid"
"golang.org/x/sys/unix"
"modernc.org/libc/errno"
"modernc.org/libc/grp"
"modernc.org/libc/poll"
"modernc.org/libc/pwd"
"modernc.org/libc/signal"
"modernc.org/libc/stdio"
"modernc.org/libc/stdlib"
"modernc.org/libc/sys/types"
ctime "modernc.org/libc/time"
)
var staticGetpwnam pwd.Passwd
func init() {
atExit = append(atExit, func() { closePasswd(&staticGetpwnam) })
}
// sighandler_t signal(int signum, sighandler_t handler);
func Xsignal(t *TLS, signum int32, handler uintptr) uintptr { //TODO use sigaction?
signalsMu.Lock()
defer signalsMu.Unlock()
r := signals[signum]
signals[signum] = handler
switch handler {
case signal.SIG_DFL:
panic(todo("%v %#x", syscall.Signal(signum), handler))
case signal.SIG_IGN:
switch r {
case signal.SIG_DFL:
gosignal.Ignore(syscall.Signal(signum)) //TODO
case signal.SIG_IGN:
gosignal.Ignore(syscall.Signal(signum))
default:
panic(todo("%v %#x", syscall.Signal(signum), handler))
}
default:
switch r {
case signal.SIG_DFL:
c := make(chan os.Signal, 1)
gosignal.Notify(c, syscall.Signal(signum))
go func() { //TODO mechanism to stop/cancel
for {
<-c
var f func(*TLS, int32)
*(*uintptr)(unsafe.Pointer(&f)) = handler
tls := NewTLS()
f(tls, signum)
tls.Close()
}
}()
case signal.SIG_IGN:
panic(todo("%v %#x", syscall.Signal(signum), handler))
default:
panic(todo("%v %#x", syscall.Signal(signum), handler))
}
}
return r
}
// void rewind(FILE *stream);
func Xrewind(t *TLS, stream uintptr) {
Xfseek(t, stream, 0, stdio.SEEK_SET)
}
// int putchar(int c);
func Xputchar(t *TLS, c int32) int32 {
if _, err := write([]byte{byte(c)}); err != nil {
return stdio.EOF
}
return int32(c)
}
// int gethostname(char *name, size_t len);
func Xgethostname(t *TLS, name uintptr, slen types.Size_t) int32 {
if slen < 0 {
t.setErrno(errno.EINVAL)
return -1
}
if slen == 0 {
return 0
}
s, err := os.Hostname()
if err != nil {
panic(todo(""))
}
n := len(s)
if len(s) >= int(slen) {
n = int(slen) - 1
}
sh := (*reflect.StringHeader)(unsafe.Pointer(&s))
copy((*RawMem)(unsafe.Pointer(name))[:n:n], (*RawMem)(unsafe.Pointer(sh.Data))[:n:n])
*(*byte)(unsafe.Pointer(name + uintptr(n))) = 0
return 0
}
// int remove(const char *pathname);
func Xremove(t *TLS, pathname uintptr) int32 {
panic(todo(""))
}
// long pathconf(const char *path, int name);
func Xpathconf(t *TLS, path uintptr, name int32) long {
panic(todo(""))
}
// ssize_t recvfrom(int sockfd, void *buf, size_t len, int flags, struct sockaddr *src_addr, socklen_t *addrlen);
func Xrecvfrom(t *TLS, sockfd int32, buf uintptr, len types.Size_t, flags int32, src_addr, addrlen uintptr) types.Ssize_t {
panic(todo(""))
}
// ssize_t sendto(int sockfd, const void *buf, size_t len, int flags, const struct sockaddr *dest_addr, socklen_t addrlen);
func Xsendto(t *TLS, sockfd int32, buf uintptr, len types.Size_t, flags int32, src_addr uintptr, addrlen socklen_t) types.Ssize_t {
panic(todo(""))
}
// void srand48(long int seedval);
func Xsrand48(t *TLS, seedval long) {
panic(todo(""))
}
// long int lrand48(void);
func Xlrand48(t *TLS) long {
panic(todo(""))
}
// ssize_t sendmsg(int sockfd, const struct msghdr *msg, int flags);
func Xsendmsg(t *TLS, sockfd int32, msg uintptr, flags int32) types.Ssize_t {
panic(todo(""))
}
// int poll(struct pollfd *fds, nfds_t nfds, int timeout);
func Xpoll(t *TLS, fds uintptr, nfds poll.Nfds_t, timeout int32) int32 {
if nfds == 0 {
panic(todo(""))
}
// if dmesgs {
// dmesg("%v: %#x %v %v, %+v", origin(1), fds, nfds, timeout, (*[1000]unix.PollFd)(unsafe.Pointer(fds))[:nfds:nfds])
// }
n, err := unix.Poll((*[1000]unix.PollFd)(unsafe.Pointer(fds))[:nfds:nfds], int(timeout))
// if dmesgs {
// dmesg("%v: %v %v", origin(1), n, err)
// }
if err != nil {
t.setErrno(err)
return -1
}
return int32(n)
}
// ssize_t recvmsg(int sockfd, struct msghdr *msg, int flags);
func Xrecvmsg(t *TLS, sockfd int32, msg uintptr, flags int32) types.Ssize_t {
n, _, err := unix.Syscall(unix.SYS_RECVMSG, uintptr(sockfd), msg, uintptr(flags))
if err != 0 {
t.setErrno(err)
return -1
}
return types.Ssize_t(n)
}
// struct cmsghdr *CMSG_NXTHDR(struct msghdr *msgh, struct cmsghdr *cmsg);
func X__cmsg_nxthdr(t *TLS, msgh, cmsg uintptr) uintptr {
panic(todo(""))
}
// wchar_t *wcschr(const wchar_t *wcs, wchar_t wc);
func Xwcschr(t *TLS, wcs uintptr, wc wchar_t) wchar_t {
panic(todo(""))
}
// gid_t getegid(void);
func Xgetegid(t *TLS) types.Gid_t {
panic(todo(""))
}
// gid_t getgid(void);
func Xgetgid(t *TLS) types.Gid_t {
panic(todo(""))
}
// void *shmat(int shmid, const void *shmaddr, int shmflg);
func Xshmat(t *TLS, shmid int32, shmaddr uintptr, shmflg int32) uintptr {
panic(todo(""))
}
// int shmctl(int shmid, int cmd, struct shmid_ds *buf);
func Xshmctl(t *TLS, shmid, cmd int32, buf uintptr) int32 {
panic(todo(""))
}
// int shmdt(const void *shmaddr);
func Xshmdt(t *TLS, shmaddr uintptr) int32 {
panic(todo(""))
}
// int getresuid(uid_t *ruid, uid_t *euid, uid_t *suid);
func Xgetresuid(t *TLS, ruid, euid, suid uintptr) int32 {
panic(todo(""))
}
// int getresgid(gid_t *rgid, gid_t *egid, gid_t *sgid);
func Xgetresgid(t *TLS, rgid, egid, sgid uintptr) int32 {
panic(todo(""))
}
// FILE *tmpfile(void);
func Xtmpfile(t *TLS) uintptr {
f, err := ioutil.TempFile("", "tmpfile-")
if err != nil {
t.setErrno(err)
return 0
}
cf := newFile(t, int32(f.Fd()))
AtExit(func() {
nm := f.Name()
file(cf).close(t)
os.Remove(nm)
})
return cf
}
// FILE *fdopen(int fd, const char *mode);
func Xfdopen(t *TLS, fd int32, mode uintptr) uintptr {
m := strings.ReplaceAll(GoString(mode), "b", "")
switch m {
case
"a",
"a+",
"r",
"r+",
"w",
"w+":
default:
t.setErrno(errno.EINVAL)
return 0
}
if p := newFile(t, fd); p != 0 {
return p
}
t.setErrno(errno.EINVAL)
return 0
}
// struct passwd *getpwnam(const char *name);
func Xgetpwnam(t *TLS, name uintptr) uintptr {
f, err := os.Open("/etc/passwd")
if err != nil {
panic(todo("", err))
}
defer f.Close()
sname := GoString(name)
sc := bufio.NewScanner(f)
for sc.Scan() {
s := strings.TrimSpace(sc.Text())
if s == "" || strings.HasPrefix(s, "#") {
continue
}
// eg. "root:x:0:0:root:/root:/bin/bash"
a := strings.Split(s, ":")
if len(a) < 7 {
panic(todo(""))
}
if a[0] == sname {
uid, err := strconv.Atoi(a[2])
if err != nil {
panic(todo(""))
}
gid, err := strconv.Atoi(a[3])
if err != nil {
panic(todo(""))
}
closePasswd(&staticGetpwnam)
gecos := a[4]
if strings.Contains(gecos, ",") {
a := strings.Split(gecos, ",")
gecos = a[0]
}
initPasswd(t, &staticGetpwnam, a[0], a[1], uint32(uid), uint32(gid), gecos, a[5], a[6])
return uintptr(unsafe.Pointer(&staticGetpwnam))
}
}
if sc.Err() != nil {
panic(todo(""))
}
return 0
}
// int getpwnam_r(char *name, struct passwd *pwd, char *buf, size_t buflen, struct passwd **result);
func Xgetpwnam_r(t *TLS, name, cpwd, buf uintptr, buflen types.Size_t, result uintptr) int32 {
f, err := os.Open("/etc/passwd")
if err != nil {
panic(todo("", err))
}
defer f.Close()
sname := GoString(name)
sc := bufio.NewScanner(f)
for sc.Scan() {
s := strings.TrimSpace(sc.Text())
if s == "" || strings.HasPrefix(s, "#") {
continue
}
// eg. "root:x:0:0:root:/root:/bin/bash"
a := strings.Split(s, ":")
if len(a) < 7 {
panic(todo("%q", s))
}
if a[0] == sname {
uid, err := strconv.Atoi(a[2])
if err != nil {
panic(todo(""))
}
gid, err := strconv.Atoi(a[3])
if err != nil {
panic(todo(""))
}
gecos := a[4]
if strings.Contains(gecos, ",") {
a := strings.Split(gecos, ",")
gecos = a[0]
}
var v pwd.Passwd
if initPasswd2(t, buf, buflen, &v, a[0], a[1], uint32(uid), uint32(gid), gecos, a[5], a[6]) {
*(*pwd.Passwd)(unsafe.Pointer(cpwd)) = v
*(*uintptr)(unsafe.Pointer(result)) = cpwd
return 0
}
*(*uintptr)(unsafe.Pointer(result)) = 0
return errno.ERANGE
}
}
if sc.Err() != nil {
panic(todo(""))
}
*(*uintptr)(unsafe.Pointer(result)) = 0
return 0
}
func init() {
atExit = append(atExit, func() { closeGroup(&staticGetgrgid) })
}
var staticGetgrgid grp.Group
// struct group *getgrgid(gid_t gid);
func Xgetgrgid(t *TLS, gid uint32) uintptr {
f, err := os.Open("/etc/group")
if err != nil {
panic(todo(""))
}
defer f.Close()
sid := strconv.Itoa(int(gid))
sc := bufio.NewScanner(f)
for sc.Scan() {
s := strings.TrimSpace(sc.Text())
if s == "" || strings.HasPrefix(s, "#") {
continue
}
// eg. "root:x:0:"
a := strings.Split(s, ":")
if len(a) < 4 {
panic(todo("%q", s))
}
if a[2] == sid {
closeGroup(&staticGetgrgid)
var names []string
if a[3] != "" {
names = strings.Split(a[3], ",")
}
initGroup(t, &staticGetgrgid, a[0], a[1], gid, names)
return uintptr(unsafe.Pointer(&staticGetgrgid))
}
}
if sc.Err() != nil {
panic(todo(""))
}
return 0
}
// int getgrgid_r(gid_t gid, struct group *grp, char *buf, size_t buflen, struct group **result);
func Xgetgrgid_r(t *TLS, gid uint32, pGrp, buf uintptr, buflen types.Size_t, result uintptr) int32 {
f, err := os.Open("/etc/group")
if err != nil {
panic(todo(""))
}
defer f.Close()
sid := strconv.Itoa(int(gid))
sc := bufio.NewScanner(f)
for sc.Scan() {
s := strings.TrimSpace(sc.Text())
if s == "" || strings.HasPrefix(s, "#") {
continue
}
// eg. "root:x:0:"
a := strings.Split(s, ":")
if len(a) < 4 {
panic(todo("%q", s))
}
if a[2] == sid {
var names []string
if a[3] != "" {
names = strings.Split(a[3], ",")
}
var x grp.Group
if initGroup2(buf, buflen, &x, a[0], a[1], gid, names) {
*(*grp.Group)(unsafe.Pointer(pGrp)) = x
*(*uintptr)(unsafe.Pointer(result)) = pGrp
return 0
}
*(*uintptr)(unsafe.Pointer(result)) = 0
return 0
}
}
if sc.Err() != nil {
panic(todo(""))
}
*(*uintptr)(unsafe.Pointer(result)) = 0
return 0
}
func initPasswd2(t *TLS, buf uintptr, buflen types.Size_t, p *pwd.Passwd, name, pwd string, uid, gid uint32, gecos, dir, shell string) bool {
p.Fpw_name, buf, buflen = bufString(buf, buflen, name)
if buf == 0 {
return false
}
p.Fpw_passwd, buf, buflen = bufString(buf, buflen, pwd)
if buf == 0 {
return false
}
p.Fpw_uid = uid
p.Fpw_gid = gid
if buf == 0 {
return false
}
p.Fpw_gecos, buf, buflen = bufString(buf, buflen, gecos)
if buf == 0 {
return false
}
p.Fpw_dir, buf, buflen = bufString(buf, buflen, dir)
if buf == 0 {
return false
}
p.Fpw_shell, buf, buflen = bufString(buf, buflen, shell)
if buf == 0 {
return false
}
return true
}
func bufString(buf uintptr, buflen types.Size_t, s string) (uintptr, uintptr, types.Size_t) {
buf0 := buf
rq := len(s) + 1
if rq > int(buflen) {
return 0, 0, 0
}
copy((*RawMem)(unsafe.Pointer(buf))[:len(s):len(s)], s)
buf += uintptr(len(s))
*(*byte)(unsafe.Pointer(buf)) = 0
return buf0, buf + 1, buflen - types.Size_t(rq)
}
func closeGroup(p *grp.Group) {
Xfree(nil, p.Fgr_name)
Xfree(nil, p.Fgr_passwd)
if p := p.Fgr_mem; p != 0 {
for {
q := *(*uintptr)(unsafe.Pointer(p))
if q == 0 {
break
}
Xfree(nil, q)
p += unsafe.Sizeof(uintptr(0))
}
}
*p = grp.Group{}
}
func initGroup(t *TLS, p *grp.Group, name, pwd string, gid uint32, names []string) {
p.Fgr_name = cString(t, name)
p.Fgr_passwd = cString(t, pwd)
p.Fgr_gid = gid
a := Xcalloc(t, 1, types.Size_t(unsafe.Sizeof(uintptr(0)))*types.Size_t((len(names)+1)))
if a == 0 {
panic("OOM")
}
for p := a; len(names) != 0; p += unsafe.Sizeof(uintptr(0)) {
*(*uintptr)(unsafe.Pointer(p)) = cString(t, names[0])
names = names[1:]
}
p.Fgr_mem = a
}
func initGroup2(buf uintptr, buflen types.Size_t, p *grp.Group, name, pwd string, gid uint32, names []string) bool {
p.Fgr_name, buf, buflen = bufString(buf, buflen, name)
if buf == 0 {
return false
}
p.Fgr_passwd, buf, buflen = bufString(buf, buflen, pwd)
if buf == 0 {
return false
}
p.Fgr_gid = gid
rq := unsafe.Sizeof(uintptr(0)) * uintptr(len(names)+1)
if rq > uintptr(buflen) {
return false
}
a := buf
buf += rq
for ; len(names) != 0; buf += unsafe.Sizeof(uintptr(0)) {
if len(names[0])+1 > int(buflen) {
return false
}
*(*uintptr)(unsafe.Pointer(buf)), buf, buflen = bufString(buf, buflen, names[0])
names = names[1:]
}
*(*uintptr)(unsafe.Pointer(buf)) = 0
p.Fgr_mem = a
return true
}
func init() {
atExit = append(atExit, func() { closeGroup(&staticGetgrgid) })
}
var staticGetpwuid pwd.Passwd
func init() {
atExit = append(atExit, func() { closePasswd(&staticGetpwuid) })
}
func closePasswd(p *pwd.Passwd) {
Xfree(nil, p.Fpw_name)
Xfree(nil, p.Fpw_passwd)
Xfree(nil, p.Fpw_gecos)
Xfree(nil, p.Fpw_dir)
Xfree(nil, p.Fpw_shell)
*p = pwd.Passwd{}
}
var staticGetgrnam grp.Group
func init() {
atExit = append(atExit, func() { closeGroup(&staticGetgrnam) })
}
// struct passwd *getpwuid(uid_t uid);
func Xgetpwuid(t *TLS, uid uint32) uintptr {
f, err := os.Open("/etc/passwd")
if err != nil {
panic(todo("", err))
}
defer f.Close()
sid := strconv.Itoa(int(uid))
sc := bufio.NewScanner(f)
for sc.Scan() {
s := strings.TrimSpace(sc.Text())
if len(s) == 0 || strings.HasPrefix(s, "#") {
continue
}
// eg. "root:x:0:0:root:/root:/bin/bash"
a := strings.Split(s, ":")
if len(a) < 7 {
panic(todo("%q", s))
}
if a[2] == sid {
uid, err := strconv.Atoi(a[2])
if err != nil {
panic(todo(""))
}
gid, err := strconv.Atoi(a[3])
if err != nil {
panic(todo(""))
}
closePasswd(&staticGetpwuid)
gecos := a[4]
if strings.Contains(gecos, ",") {
a := strings.Split(gecos, ",")
gecos = a[0]
}
initPasswd(t, &staticGetpwuid, a[0], a[1], uint32(uid), uint32(gid), gecos, a[5], a[6])
return uintptr(unsafe.Pointer(&staticGetpwuid))
}
}
if sc.Err() != nil {
panic(todo(""))
}
return 0
}
func initPasswd(t *TLS, p *pwd.Passwd, name, pwd string, uid, gid uint32, gecos, dir, shell string) {
p.Fpw_name = cString(t, name)
p.Fpw_passwd = cString(t, pwd)
p.Fpw_uid = uid
p.Fpw_gid = gid
p.Fpw_gecos = cString(t, gecos)
p.Fpw_dir = cString(t, dir)
p.Fpw_shell = cString(t, shell)
}
// struct group *getgrnam(const char *name);
func Xgetgrnam(t *TLS, name uintptr) uintptr {
f, err := os.Open("/etc/group")
if err != nil {
panic(todo(""))
}
defer f.Close()
sname := GoString(name)
sc := bufio.NewScanner(f)
for sc.Scan() {
s := strings.TrimSpace(sc.Text())
if len(s) == 0 || strings.HasPrefix(s, "#") {
continue
}
// eg. "root:x:0:"
a := strings.Split(s, ":")
if len(a) < 4 {
panic(todo("%q", s))
}
if a[0] == sname {
closeGroup(&staticGetgrnam)
gid, err := strconv.Atoi(a[2])
if err != nil {
panic(todo(""))
}
var names []string
if a[3] != "" {
names = strings.Split(a[3], ",")
}
initGroup(t, &staticGetgrnam, a[0], a[1], uint32(gid), names)
return uintptr(unsafe.Pointer(&staticGetgrnam))
}
}
if sc.Err() != nil {
panic(todo(""))
}
return 0
}
// int getgrnam_r(const char *name, struct group *grp, char *buf, size_t buflen, struct group **result);
func Xgetgrnam_r(t *TLS, name, pGrp, buf uintptr, buflen types.Size_t, result uintptr) int32 {
f, err := os.Open("/etc/group")
if err != nil {
panic(todo(""))
}
defer f.Close()
sname := GoString(name)
sc := bufio.NewScanner(f)
for sc.Scan() {
s := strings.TrimSpace(sc.Text())
if len(s) == 0 || strings.HasPrefix(s, "#") {
continue
}
// eg. "root:x:0:"
a := strings.Split(s, ":")
if len(a) < 4 {
panic(todo("%q", s))
}
if a[0] == sname {
gid, err := strconv.Atoi(a[2])
if err != nil {
panic(todo(""))
}
var names []string
if a[3] != "" {
names = strings.Split(a[3], ",")
}
var x grp.Group
if initGroup2(buf, buflen, &x, a[0], a[1], uint32(gid), names) {
*(*grp.Group)(unsafe.Pointer(pGrp)) = x
*(*uintptr)(unsafe.Pointer(result)) = pGrp
return 0
}
*(*uintptr)(unsafe.Pointer(result)) = 0
return 0
}
}
if sc.Err() != nil {
panic(todo(""))
}
*(*uintptr)(unsafe.Pointer(result)) = 0
return 0
}
// int getpwuid_r(uid_t uid, struct passwd *pwd, char *buf, size_t buflen, struct passwd **result);
func Xgetpwuid_r(t *TLS, uid types.Uid_t, cpwd, buf uintptr, buflen types.Size_t, result uintptr) int32 {
f, err := os.Open("/etc/passwd")
if err != nil {
panic(todo("", err))
}
defer f.Close()
sid := strconv.Itoa(int(uid))
sc := bufio.NewScanner(f)
for sc.Scan() {
s := strings.TrimSpace(sc.Text())
if len(s) == 0 || strings.HasPrefix(s, "#") {
continue
}
// eg. "root:x:0:0:root:/root:/bin/bash"
a := strings.Split(s, ":")
if len(a) < 7 {
panic(todo("%q", s))
}
if a[2] == sid {
uid, err := strconv.Atoi(a[2])
if err != nil {
panic(todo(""))
}
gid, err := strconv.Atoi(a[3])
if err != nil {
panic(todo(""))
}
gecos := a[4]
if strings.Contains(gecos, ",") {
a := strings.Split(gecos, ",")
gecos = a[0]
}
var v pwd.Passwd
if initPasswd2(t, buf, buflen, &v, a[0], a[1], uint32(uid), uint32(gid), gecos, a[5], a[6]) {
*(*pwd.Passwd)(unsafe.Pointer(cpwd)) = v
*(*uintptr)(unsafe.Pointer(result)) = cpwd
return 0
}
*(*uintptr)(unsafe.Pointer(result)) = 0
return errno.ERANGE
}
}
if sc.Err() != nil {
panic(todo(""))
}
*(*uintptr)(unsafe.Pointer(result)) = 0
return 0
}
// int mkostemp(char *template, int flags);
func Xmkostemp(t *TLS, template uintptr, flags int32) int32 {
len := uintptr(Xstrlen(t, template))
x := template + uintptr(len-6)
for i := uintptr(0); i < 6; i++ {
if *(*byte)(unsafe.Pointer(x + i)) != 'X' {
t.setErrno(errno.EINVAL)
return -1
}
}
fd, err := tempFile(template, x, flags)
if err != nil {
t.setErrno(err)
return -1
}
return int32(fd)
}
// void uuid_generate_random(uuid_t out);
func Xuuid_generate_random(t *TLS, out uintptr) {
x := guuid.New()
copy((*RawMem)(unsafe.Pointer(out))[:], x[:])
}
// void uuid_unparse(uuid_t uu, char *out);
func Xuuid_unparse(t *TLS, uu, out uintptr) {
s := (*guuid.UUID)(unsafe.Pointer(uu)).String()
copy((*RawMem)(unsafe.Pointer(out))[:], s)
*(*byte)(unsafe.Pointer(out + uintptr(len(s)))) = 0
}
var staticRandomData = &rand.Rand{}
// char *initstate(unsigned seed, char *state, size_t size);
func Xinitstate(t *TLS, seed uint32, statebuf uintptr, statelen types.Size_t) uintptr {
staticRandomData = rand.New(rand.NewSource(int64(seed)))
return 0
}
// char *setstate(const char *state);
func Xsetstate(t *TLS, state uintptr) uintptr {
t.setErrno(errno.EINVAL) //TODO
return 0
}
// The initstate_r() function is like initstate(3) except that it initializes
// the state in the object pointed to by buf, rather than initializing the
// global state variable. Before calling this function, the buf.state field
// must be initialized to NULL. The initstate_r() function records a pointer
// to the statebuf argument inside the structure pointed to by buf. Thus,
// state buf should not be deallocated so long as buf is still in use. (So,
// statebuf should typically be allocated as a static variable, or allocated on
// the heap using malloc(3) or similar.)
//
// char *initstate_r(unsigned int seed, char *statebuf, size_t statelen, struct random_data *buf);
func Xinitstate_r(t *TLS, seed uint32, statebuf uintptr, statelen types.Size_t, buf uintptr) int32 {
if buf == 0 {
panic(todo(""))
}
randomDataMu.Lock()
defer randomDataMu.Unlock()
randomData[buf] = rand.New(rand.NewSource(int64(seed)))
return 0
}
var (
randomData = map[uintptr]*rand.Rand{}
randomDataMu sync.Mutex
)
// int mkstemps(char *template, int suffixlen);
func Xmkstemps(t *TLS, template uintptr, suffixlen int32) int32 {
return Xmkstemps64(t, template, suffixlen)
}
// int mkstemps(char *template, int suffixlen);
func Xmkstemps64(t *TLS, template uintptr, suffixlen int32) int32 {
len := uintptr(Xstrlen(t, template))
x := template + uintptr(len-6) - uintptr(suffixlen)
for i := uintptr(0); i < 6; i++ {
if *(*byte)(unsafe.Pointer(x + i)) != 'X' {
t.setErrno(errno.EINVAL)
return -1
}
}
fd, err := tempFile(template, x, 0)
if err != nil {
t.setErrno(err)
return -1
}
return int32(fd)
}
// int mkstemp(char *template);
func Xmkstemp(t *TLS, template uintptr) int32 {
return Xmkstemp64(t, template)
}
// int mkstemp(char *template);
func Xmkstemp64(t *TLS, template uintptr) int32 {
return Xmkstemps64(t, template, 0)
}
// int random_r(struct random_data *buf, int32_t *result);
func Xrandom_r(t *TLS, buf, result uintptr) int32 {
randomDataMu.Lock()
defer randomDataMu.Unlock()
mr := randomData[buf]
if stdlib.RAND_MAX != math.MaxInt32 {
panic(todo(""))
}
*(*int32)(unsafe.Pointer(result)) = mr.Int31()
return 0
}
// int strerror_r(int errnum, char *buf, size_t buflen);
func Xstrerror_r(t *TLS, errnum int32, buf uintptr, buflen size_t) int32 {
panic(todo(""))
}
// void endpwent(void);
func Xendpwent(t *TLS) {
// nop
}
var ctimeStaticBuf [32]byte
// char *ctime(const time_t *timep);
func Xctime(t *TLS, timep uintptr) uintptr {
return Xctime_r(t, timep, uintptr(unsafe.Pointer(&ctimeStaticBuf[0])))
}
// char *ctime_r(const time_t *timep, char *buf);
func Xctime_r(t *TLS, timep, buf uintptr) uintptr {
ut := *(*ctime.Time_t)(unsafe.Pointer(timep))
tm := time.Unix(int64(ut), 0).Local()
s := tm.Format(time.ANSIC) + "\n\x00"
copy((*RawMem)(unsafe.Pointer(buf))[:26:26], s)
return buf
}