GoToSocial/vendor/modernc.org/libc/libc_unix.go
tobi 67ac8db190
Upstep Go dependencies (#340)
* Upstep Go dependencies

* tiny linter fix

* Tidy
2021-12-12 15:47:51 +01:00

838 lines
18 KiB
Go

// 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
// +build linux darwin freebsd netbsd
package libc // import "modernc.org/libc"
import (
"bufio"
"io/ioutil"
"os"
gosignal "os/signal"
"reflect"
"strconv"
"strings"
"syscall"
"unsafe"
"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/sys/types"
)
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
}