451 lines
11 KiB
Go
451 lines
11 KiB
Go
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// Copyright 2020 The Libc Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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package libc // import "modernc.org/libc"
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import (
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"strings"
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"time"
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"unsafe"
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"golang.org/x/sys/unix"
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"modernc.org/libc/fcntl"
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"modernc.org/libc/signal"
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"modernc.org/libc/sys/types"
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"modernc.org/libc/utime"
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)
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// int sigaction(int signum, const struct sigaction *act, struct sigaction *oldact);
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func Xsigaction(t *TLS, signum int32, act, oldact uintptr) int32 {
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var kact, koldact uintptr
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if act != 0 {
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sz := int(unsafe.Sizeof(signal.X__sigaction{}))
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kact = t.Alloc(sz)
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defer t.Free(sz)
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(*signal.X__sigaction)(unsafe.Pointer(kact)).F__sigaction_u.F__sa_handler = (*signal.Sigaction)(unsafe.Pointer(act)).F__sigaction_u.F__sa_handler
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(*signal.X__sigaction)(unsafe.Pointer(kact)).Fsa_flags = (*signal.Sigaction)(unsafe.Pointer(act)).Fsa_flags
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Xmemcpy(t, kact+unsafe.Offsetof(signal.X__sigaction{}.Fsa_mask), act+unsafe.Offsetof(signal.Sigaction{}.Fsa_mask), types.Size_t(unsafe.Sizeof(signal.Sigset_t(0))))
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}
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if oldact != 0 {
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panic(todo(""))
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}
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if _, _, err := unix.Syscall6(unix.SYS_SIGACTION, uintptr(signum), kact, koldact, unsafe.Sizeof(signal.Sigset_t(0)), 0, 0); err != 0 {
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t.setErrno(err)
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return -1
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}
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if oldact != 0 {
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panic(todo(""))
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}
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return 0
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}
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// int fcntl(int fd, int cmd, ... /* arg */ );
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func Xfcntl64(t *TLS, fd, cmd int32, args uintptr) (r int32) {
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var err error
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var p uintptr
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var i int
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switch cmd {
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case fcntl.F_GETLK, fcntl.F_SETLK, fcntl.F_SETLKW:
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p = *(*uintptr)(unsafe.Pointer(args))
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err = unix.FcntlFlock(uintptr(fd), int(cmd), (*unix.Flock_t)(unsafe.Pointer(p)))
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case fcntl.F_GETFL, fcntl.F_FULLFSYNC:
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i, err = unix.FcntlInt(uintptr(fd), int(cmd), 0)
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r = int32(i)
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case fcntl.F_SETFD, fcntl.F_SETFL:
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arg := *(*int32)(unsafe.Pointer(args))
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_, err = unix.FcntlInt(uintptr(fd), int(cmd), int(arg))
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default:
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panic(todo("%v: %v %v", origin(1), fd, cmd))
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}
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if err != nil {
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if dmesgs {
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dmesg("%v: fd %v cmd %v p %#x: %v FAIL", origin(1), fcntlCmdStr(fd), cmd, p, err)
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}
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t.setErrno(err)
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return -1
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}
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if dmesgs {
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dmesg("%v: %d %s %#x: ok", origin(1), fd, fcntlCmdStr(cmd), p)
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}
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return r
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}
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// int lstat(const char *pathname, struct stat *statbuf);
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func Xlstat64(t *TLS, pathname, statbuf uintptr) int32 {
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if err := unix.Lstat(GoString(pathname), (*unix.Stat_t)(unsafe.Pointer(statbuf))); err != nil {
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if dmesgs {
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dmesg("%v: %q: %v FAIL", origin(1), GoString(pathname), err)
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}
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t.setErrno(err)
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return -1
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}
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if dmesgs {
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dmesg("%v: %q: ok", origin(1), GoString(pathname))
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}
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return 0
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}
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// int stat(const char *pathname, struct stat *statbuf);
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func Xstat64(t *TLS, pathname, statbuf uintptr) int32 {
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if err := unix.Stat(GoString(pathname), (*unix.Stat_t)(unsafe.Pointer(statbuf))); err != nil {
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if dmesgs {
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dmesg("%v: %q: %v FAIL", origin(1), GoString(pathname), err)
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}
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t.setErrno(err)
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return -1
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}
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if dmesgs {
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dmesg("%v: %q: ok", origin(1), GoString(pathname))
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}
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return 0
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}
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// int fstatfs(int fd, struct statfs *buf);
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func Xfstatfs(t *TLS, fd int32, buf uintptr) int32 {
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if err := unix.Fstatfs(int(fd), (*unix.Statfs_t)(unsafe.Pointer(buf))); err != nil {
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if dmesgs {
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dmesg("%v: %v: %v FAIL", origin(1), fd, err)
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}
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t.setErrno(err)
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return -1
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}
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if dmesgs {
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dmesg("%v: %v: ok", origin(1), fd)
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}
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return 0
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}
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// int statfs(const char *path, struct statfs *buf);
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func Xstatfs(t *TLS, path uintptr, buf uintptr) int32 {
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if err := unix.Statfs(GoString(path), (*unix.Statfs_t)(unsafe.Pointer(buf))); err != nil {
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if dmesgs {
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dmesg("%v: %q: %v FAIL", origin(1), GoString(path), err)
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}
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t.setErrno(err)
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return -1
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}
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if dmesgs {
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dmesg("%v: %q: ok", origin(1), GoString(path))
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}
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return 0
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}
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// int fstat(int fd, struct stat *statbuf);
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func Xfstat64(t *TLS, fd int32, statbuf uintptr) int32 {
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if err := unix.Fstat(int(fd), (*unix.Stat_t)(unsafe.Pointer(statbuf))); err != nil {
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if dmesgs {
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dmesg("%v: fd %d: %v FAIL", origin(1), fd, err)
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}
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t.setErrno(err)
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return -1
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}
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if dmesgs {
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dmesg("%v: fd %d: ok", origin(1), fd)
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}
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return 0
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}
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// off64_t lseek64(int fd, off64_t offset, int whence);
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func Xlseek64(t *TLS, fd int32, offset types.Off_t, whence int32) types.Off_t {
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n, err := unix.Seek(int(fd), int64(offset), int(whence))
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if err != nil {
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if dmesgs {
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dmesg("%v: %v FAIL", origin(1), err)
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}
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t.setErrno(err)
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return -1
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}
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if dmesgs {
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dmesg("%v: ok", origin(1))
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}
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return types.Off_t(n)
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}
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// int utime(const char *filename, const struct utimbuf *times);
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func Xutime(t *TLS, filename, times uintptr) int32 {
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var a []unix.Timeval
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if times != 0 {
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a = make([]unix.Timeval, 2)
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a[0].Sec = (*utime.Utimbuf)(unsafe.Pointer(times)).Factime
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a[1].Sec = (*utime.Utimbuf)(unsafe.Pointer(times)).Fmodtime
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}
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if err := unix.Utimes(GoString(filename), a); err != nil {
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if dmesgs {
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dmesg("%v: %v FAIL", origin(1), err)
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}
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t.setErrno(err)
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return -1
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}
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if dmesgs {
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dmesg("%v: ok", origin(1))
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}
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return 0
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}
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// unsigned int alarm(unsigned int seconds);
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func Xalarm(t *TLS, seconds uint32) uint32 {
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panic(todo(""))
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// n, _, err := unix.Syscall(unix.SYS_ALARM, uintptr(seconds), 0, 0)
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// if err != 0 {
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// panic(todo(""))
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// }
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// return uint32(n)
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}
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// time_t time(time_t *tloc);
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func Xtime(t *TLS, tloc uintptr) types.Time_t {
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n := time.Now().UTC().Unix()
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if tloc != 0 {
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*(*types.Time_t)(unsafe.Pointer(tloc)) = types.Time_t(n)
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}
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return types.Time_t(n)
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}
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// // int getrlimit(int resource, struct rlimit *rlim);
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// func Xgetrlimit64(t *TLS, resource int32, rlim uintptr) int32 {
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// if _, _, err := unix.Syscall(unix.SYS_GETRLIMIT, uintptr(resource), uintptr(rlim), 0); err != 0 {
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// t.setErrno(err)
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// return -1
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// }
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//
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// return 0
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// }
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// int mkdir(const char *path, mode_t mode);
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func Xmkdir(t *TLS, path uintptr, mode types.Mode_t) int32 {
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if err := unix.Mkdir(GoString(path), uint32(mode)); err != nil {
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if dmesgs {
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dmesg("%v: %q: %v FAIL", origin(1), GoString(path), err)
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}
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t.setErrno(err)
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return -1
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}
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if dmesgs {
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dmesg("%v: %q: ok", origin(1), GoString(path))
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}
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return 0
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}
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// int symlink(const char *target, const char *linkpath);
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func Xsymlink(t *TLS, target, linkpath uintptr) int32 {
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if err := unix.Symlink(GoString(target), GoString(linkpath)); err != nil {
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if dmesgs {
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dmesg("%v: %v FAIL", origin(1), err)
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}
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t.setErrno(err)
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return -1
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}
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if dmesgs {
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dmesg("%v: ok", origin(1))
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}
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return 0
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}
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// int chmod(const char *pathname, mode_t mode)
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func Xchmod(t *TLS, pathname uintptr, mode types.Mode_t) int32 {
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if err := unix.Chmod(GoString(pathname), uint32(mode)); err != nil {
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if dmesgs {
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dmesg("%v: %q %#o: %v FAIL", origin(1), GoString(pathname), mode, err)
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}
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t.setErrno(err)
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return -1
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}
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if dmesgs {
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dmesg("%v: %q %#o: ok", origin(1), GoString(pathname), mode)
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}
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return 0
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}
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// int utimes(const char *filename, const struct timeval times[2]);
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func Xutimes(t *TLS, filename, times uintptr) int32 {
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var a []unix.Timeval
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if times != 0 {
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a = make([]unix.Timeval, 2)
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a[0] = *(*unix.Timeval)(unsafe.Pointer(times))
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a[1] = *(*unix.Timeval)(unsafe.Pointer(times + unsafe.Sizeof(unix.Timeval{})))
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}
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if err := unix.Utimes(GoString(filename), a); err != nil {
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if dmesgs {
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dmesg("%v: %v FAIL", origin(1), err)
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}
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t.setErrno(err)
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return -1
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}
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if dmesgs {
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dmesg("%v: ok", origin(1))
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}
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return 0
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}
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// int unlink(const char *pathname);
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func Xunlink(t *TLS, pathname uintptr) int32 {
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if err := unix.Unlink(GoString(pathname)); err != nil {
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if dmesgs {
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dmesg("%v: %q: %v", origin(1), GoString(pathname), err)
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}
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t.setErrno(err)
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return -1
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}
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if dmesgs {
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dmesg("%v: ok", origin(1))
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}
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return 0
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}
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// int access(const char *pathname, int mode);
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func Xaccess(t *TLS, pathname uintptr, mode int32) int32 {
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if err := unix.Access(GoString(pathname), uint32(mode)); err != nil {
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if dmesgs {
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dmesg("%v: %q %#o: %v FAIL", origin(1), GoString(pathname), mode, err)
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}
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t.setErrno(err)
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return -1
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}
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if dmesgs {
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dmesg("%v: %q %#o: ok", origin(1), GoString(pathname), mode)
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}
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return 0
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}
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// int rename(const char *oldpath, const char *newpath);
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func Xrename(t *TLS, oldpath, newpath uintptr) int32 {
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if err := unix.Rename(GoString(oldpath), GoString(newpath)); err != nil {
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if dmesgs {
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dmesg("%v: %v FAIL", origin(1), err)
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}
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t.setErrno(err)
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return -1
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}
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if dmesgs {
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dmesg("%v: ok", origin(1))
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}
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return 0
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}
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// int mknod(const char *pathname, mode_t mode, dev_t dev);
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func Xmknod(t *TLS, pathname uintptr, mode types.Mode_t, dev types.Dev_t) int32 {
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panic(todo(""))
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// if _, _, err := unix.Syscall(unix.SYS_MKNOD, pathname, uintptr(mode), uintptr(dev)); err != 0 {
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// t.setErrno(err)
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// return -1
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// }
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// return 0
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}
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// int chown(const char *pathname, uid_t owner, gid_t group);
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func Xchown(t *TLS, pathname uintptr, owner types.Uid_t, group types.Gid_t) int32 {
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panic(todo(""))
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// if _, _, err := unix.Syscall(unix.SYS_CHOWN, pathname, uintptr(owner), uintptr(group)); err != 0 {
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||
|
|
// t.setErrno(err)
|
||
|
|
// return -1
|
||
|
|
// }
|
||
|
|
|
||
|
|
// return 0
|
||
|
|
}
|
||
|
|
|
||
|
|
// int link(const char *oldpath, const char *newpath);
|
||
|
|
func Xlink(t *TLS, oldpath, newpath uintptr) int32 {
|
||
|
|
if _, _, err := unix.Syscall(unix.SYS_LINK, oldpath, newpath, 0); err != 0 {
|
||
|
|
t.setErrno(err)
|
||
|
|
return -1
|
||
|
|
}
|
||
|
|
|
||
|
|
return 0
|
||
|
|
}
|
||
|
|
|
||
|
|
// int dup2(int oldfd, int newfd);
|
||
|
|
func Xdup2(t *TLS, oldfd, newfd int32) int32 {
|
||
|
|
panic(todo(""))
|
||
|
|
// n, _, err := unix.Syscall(unix.SYS_DUP2, uintptr(oldfd), uintptr(newfd), 0)
|
||
|
|
// if err != 0 {
|
||
|
|
// t.setErrno(err)
|
||
|
|
// return -1
|
||
|
|
// }
|
||
|
|
|
||
|
|
// return int32(n)
|
||
|
|
}
|
||
|
|
|
||
|
|
// ssize_t readlink(const char *restrict path, char *restrict buf, size_t bufsize);
|
||
|
|
func Xreadlink(t *TLS, path, buf uintptr, bufsize types.Size_t) types.Ssize_t {
|
||
|
|
var n int
|
||
|
|
var err error
|
||
|
|
switch {
|
||
|
|
case buf == 0 || bufsize == 0:
|
||
|
|
n, err = unix.Readlink(GoString(path), nil)
|
||
|
|
default:
|
||
|
|
n, err = unix.Readlink(GoString(path), (*RawMem)(unsafe.Pointer(buf))[:bufsize:bufsize])
|
||
|
|
}
|
||
|
|
if err != nil {
|
||
|
|
if dmesgs {
|
||
|
|
dmesg("%v: %v FAIL", err)
|
||
|
|
}
|
||
|
|
t.setErrno(err)
|
||
|
|
return -1
|
||
|
|
}
|
||
|
|
|
||
|
|
if dmesgs {
|
||
|
|
dmesg("%v: ok")
|
||
|
|
}
|
||
|
|
return types.Ssize_t(n)
|
||
|
|
}
|
||
|
|
|
||
|
|
// FILE *fopen64(const char *pathname, const char *mode);
|
||
|
|
func Xfopen64(t *TLS, pathname, mode uintptr) uintptr {
|
||
|
|
m := strings.ReplaceAll(GoString(mode), "b", "")
|
||
|
|
var flags int
|
||
|
|
switch m {
|
||
|
|
case "r":
|
||
|
|
flags = fcntl.O_RDONLY
|
||
|
|
case "r+":
|
||
|
|
flags = fcntl.O_RDWR
|
||
|
|
case "w":
|
||
|
|
flags = fcntl.O_WRONLY | fcntl.O_CREAT | fcntl.O_TRUNC
|
||
|
|
case "w+":
|
||
|
|
flags = fcntl.O_RDWR | fcntl.O_CREAT | fcntl.O_TRUNC
|
||
|
|
case "a":
|
||
|
|
flags = fcntl.O_WRONLY | fcntl.O_CREAT | fcntl.O_APPEND
|
||
|
|
case "a+":
|
||
|
|
flags = fcntl.O_RDWR | fcntl.O_CREAT | fcntl.O_APPEND
|
||
|
|
default:
|
||
|
|
panic(m)
|
||
|
|
}
|
||
|
|
fd, err := unix.Open(GoString(pathname), int(flags), 0666)
|
||
|
|
if err != nil {
|
||
|
|
if dmesgs {
|
||
|
|
dmesg("%v: %q %q: %v FAIL", origin(1), GoString(pathname), GoString(mode), err)
|
||
|
|
}
|
||
|
|
t.setErrno(err)
|
||
|
|
return 0
|
||
|
|
}
|
||
|
|
|
||
|
|
if dmesgs {
|
||
|
|
dmesg("%v: %q %q: fd %v", origin(1), GoString(pathname), GoString(mode), fd)
|
||
|
|
}
|
||
|
|
if p := newFile(t, int32(fd)); p != 0 {
|
||
|
|
return p
|
||
|
|
}
|
||
|
|
|
||
|
|
panic("OOM")
|
||
|
|
}
|