gtsocial-umbx

libc_linux_amd64.go (11976B)

---

 // 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.
 
 package libc // import "modernc.org/libc"
 
 import (
 	"os"
 	"strings"
 	"unicode"
 	"unsafe"
 
 	"golang.org/x/sys/unix"
 	"modernc.org/libc/errno"
 	"modernc.org/libc/fcntl"
 	"modernc.org/libc/signal"
 	"modernc.org/libc/sys/types"
 	"modernc.org/libc/wctype"
 )
 
 // int sigaction(int signum, const struct sigaction *act, struct sigaction *oldact);
 func Xsigaction(t *TLS, signum int32, act, oldact uintptr) int32 {
 	// 	musl/arch/x86_64/ksigaction.h
 	//
 	//	struct k_sigaction {
 	//		void (*handler)(int);
 	//		unsigned long flags;
 	//		void (*restorer)(void);
 	//		unsigned mask[2];
 	//	};
 	type k_sigaction struct {
 		handler  uintptr
 		flags    ulong
 		restorer uintptr
 		mask     [2]uint32
 	}
 
 	var kact, koldact uintptr
 	if act != 0 {
 		sz := int(unsafe.Sizeof(k_sigaction{}))
 		kact = t.Alloc(sz)
 		defer t.Free(sz)
 		*(*k_sigaction)(unsafe.Pointer(kact)) = k_sigaction{
 			handler:  (*signal.Sigaction)(unsafe.Pointer(act)).F__sigaction_handler.Fsa_handler,
 			flags:    ulong((*signal.Sigaction)(unsafe.Pointer(act)).Fsa_flags),
 			restorer: (*signal.Sigaction)(unsafe.Pointer(act)).Fsa_restorer,
 		}
 		Xmemcpy(t, kact+unsafe.Offsetof(k_sigaction{}.mask), act+unsafe.Offsetof(signal.Sigaction{}.Fsa_mask), types.Size_t(unsafe.Sizeof(k_sigaction{}.mask)))
 	}
 	if oldact != 0 {
 		panic(todo(""))
 	}
 
 	if _, _, err := unix.Syscall6(unix.SYS_RT_SIGACTION, uintptr(signum), kact, koldact, unsafe.Sizeof(k_sigaction{}.mask), 0, 0); err != 0 {
 		t.setErrno(err)
 		return -1
 	}
 
 	if oldact != 0 {
 		panic(todo(""))
 	}
 
 	return 0
 }
 
 // int fcntl(int fd, int cmd, ... /* arg */ );
 func Xfcntl64(t *TLS, fd, cmd int32, args uintptr) int32 {
 	var arg uintptr
 	if args != 0 {
 		arg = *(*uintptr)(unsafe.Pointer(args))
 	}
 	if cmd == fcntl.F_SETFL {
 		arg |= unix.O_LARGEFILE
 	}
 	n, _, err := unix.Syscall(unix.SYS_FCNTL, uintptr(fd), uintptr(cmd), arg)
 	if err != 0 {
 		// if dmesgs {
 		// 	dmesg("%v: fd %v cmd %v", origin(1), fcntlCmdStr(fd), cmd)
 		// }
 		t.setErrno(err)
 		return -1
 	}
 
 	// if dmesgs {
 	// 	dmesg("%v: %d %s %#x: %d", origin(1), fd, fcntlCmdStr(cmd), arg, n)
 	// }
 	return int32(n)
 }
 
 // int lstat(const char *pathname, struct stat *statbuf);
 func Xlstat64(t *TLS, pathname, statbuf uintptr) int32 {
 	if _, _, err := unix.Syscall(unix.SYS_LSTAT, pathname, statbuf, 0); err != 0 {
 		// if dmesgs {
 		// 	dmesg("%v: %q: %v", origin(1), GoString(pathname), err)
 		// }
 		t.setErrno(err)
 		return -1
 	}
 
 	// if dmesgs {
 	// 	dmesg("%v: %q: ok", origin(1), GoString(pathname))
 	// }
 	return 0
 }
 
 // int stat(const char *pathname, struct stat *statbuf);
 func Xstat64(t *TLS, pathname, statbuf uintptr) int32 {
 	if _, _, err := unix.Syscall(unix.SYS_STAT, pathname, statbuf, 0); err != 0 {
 		// if dmesgs {
 		// 	dmesg("%v: %q: %v", origin(1), GoString(pathname), err)
 		// }
 		t.setErrno(err)
 		return -1
 	}
 
 	// if dmesgs {
 	// 	dmesg("%v: %q: ok", origin(1), GoString(pathname))
 	// }
 	return 0
 }
 
 // int fstat(int fd, struct stat *statbuf);
 func Xfstat64(t *TLS, fd int32, statbuf uintptr) int32 {
 	if _, _, err := unix.Syscall(unix.SYS_FSTAT, uintptr(fd), statbuf, 0); err != 0 {
 		// if dmesgs {
 		// 	dmesg("%v: fd %d: %v", origin(1), fd, err)
 		// }
 		t.setErrno(err)
 		return -1
 	}
 
 	// if dmesgs {
 	// 	dmesg("%v: %d size %#x: ok\n%+v", origin(1), fd, (*stat.Stat)(unsafe.Pointer(statbuf)).Fst_size, (*stat.Stat)(unsafe.Pointer(statbuf)))
 	// }
 	return 0
 }
 
 func Xmmap(t *TLS, addr uintptr, length types.Size_t, prot, flags, fd int32, offset types.Off_t) uintptr {
 	return Xmmap64(t, addr, length, prot, flags, fd, offset)
 }
 
 // void *mmap(void *addr, size_t length, int prot, int flags, int fd, off_t offset);
 func Xmmap64(t *TLS, addr uintptr, length types.Size_t, prot, flags, fd int32, offset types.Off_t) uintptr {
 	data, _, err := unix.Syscall6(unix.SYS_MMAP, addr, uintptr(length), uintptr(prot), uintptr(flags), uintptr(fd), uintptr(offset))
 	if err != 0 {
 		// if dmesgs {
 		// 	dmesg("%v: %v", origin(1), err)
 		// }
 		t.setErrno(err)
 		return ^uintptr(0) // (void*)-1
 	}
 
 	// if dmesgs {
 	// 	dmesg("%v: %#x", origin(1), data)
 	// }
 	return data
 }
 
 // void *mremap(void *old_address, size_t old_size, size_t new_size, int flags, ... /* void *new_address */);
 func Xmremap(t *TLS, old_address uintptr, old_size, new_size types.Size_t, flags int32, args uintptr) uintptr {
 	var arg uintptr
 	if args != 0 {
 		arg = *(*uintptr)(unsafe.Pointer(args))
 	}
 	data, _, err := unix.Syscall6(unix.SYS_MREMAP, old_address, uintptr(old_size), uintptr(new_size), uintptr(flags), arg, 0)
 	if err != 0 {
 		// if dmesgs {
 		// 	dmesg("%v: %v", origin(1), err)
 		// }
 		t.setErrno(err)
 		return ^uintptr(0) // (void*)-1
 	}
 
 	// if dmesgs {
 	// 	dmesg("%v: %#x", origin(1), data)
 	// }
 	return data
 }
 
 // int ftruncate(int fd, off_t length);
 func Xftruncate64(t *TLS, fd int32, length types.Off_t) int32 {
 	if _, _, err := unix.Syscall(unix.SYS_FTRUNCATE, uintptr(fd), uintptr(length), 0); err != 0 {
 		// if dmesgs {
 		// 	dmesg("%v: fd %d: %v", origin(1), fd, err)
 		// }
 		t.setErrno(err)
 		return -1
 	}
 
 	// if dmesgs {
 	// 	dmesg("%v: %d %#x: ok", origin(1), fd, length)
 	// }
 	return 0
 }
 
 // off64_t lseek64(int fd, off64_t offset, int whence);
 func Xlseek64(t *TLS, fd int32, offset types.Off_t, whence int32) types.Off_t {
 	n, _, err := unix.Syscall(unix.SYS_LSEEK, uintptr(fd), uintptr(offset), uintptr(whence))
 	if err != 0 {
 		// if dmesgs {
 		// 	dmesg("%v: fd %v, off %#x, whence %v: %v", origin(1), fd, offset, whenceStr(whence), err)
 		// }
 		t.setErrno(err)
 		return -1
 	}
 
 	// if dmesgs {
 	// 	dmesg("%v: fd %v, off %#x, whence %v: %#x", origin(1), fd, offset, whenceStr(whence), n)
 	// }
 	return types.Off_t(n)
 }
 
 // int utime(const char *filename, const struct utimbuf *times);
 func Xutime(t *TLS, filename, times uintptr) int32 {
 	if _, _, err := unix.Syscall(unix.SYS_UTIME, filename, times, 0); err != 0 {
 		t.setErrno(err)
 		return -1
 	}
 
 	return 0
 }
 
 // unsigned int alarm(unsigned int seconds);
 func Xalarm(t *TLS, seconds uint32) uint32 {
 	n, _, err := unix.Syscall(unix.SYS_ALARM, uintptr(seconds), 0, 0)
 	if err != 0 {
 		panic(todo(""))
 	}
 
 	return uint32(n)
 }
 
 // time_t time(time_t *tloc);
 func Xtime(t *TLS, tloc uintptr) types.Time_t {
 	n, _, err := unix.Syscall(unix.SYS_TIME, tloc, 0, 0)
 	if err != 0 {
 		t.setErrno(err)
 		return types.Time_t(-1)
 	}
 
 	if tloc != 0 {
 		*(*types.Time_t)(unsafe.Pointer(tloc)) = types.Time_t(n)
 	}
 	return types.Time_t(n)
 }
 
 // int getrlimit(int resource, struct rlimit *rlim);
 func Xgetrlimit64(t *TLS, resource int32, rlim uintptr) int32 {
 	if _, _, err := unix.Syscall(unix.SYS_GETRLIMIT, uintptr(resource), uintptr(rlim), 0); err != 0 {
 		t.setErrno(err)
 		return -1
 	}
 
 	return 0
 }
 
 // int mkdir(const char *path, mode_t mode);
 func Xmkdir(t *TLS, path uintptr, mode types.Mode_t) int32 {
 	if _, _, err := unix.Syscall(unix.SYS_MKDIR, path, uintptr(mode), 0); err != 0 {
 		t.setErrno(err)
 		return -1
 	}
 
 	// if dmesgs {
 	// 	dmesg("%v: %q: ok", origin(1), GoString(path))
 	// }
 	return 0
 }
 
 // int symlink(const char *target, const char *linkpath);
 func Xsymlink(t *TLS, target, linkpath uintptr) int32 {
 	if _, _, err := unix.Syscall(unix.SYS_SYMLINK, target, linkpath, 0); err != 0 {
 		t.setErrno(err)
 		return -1
 	}
 
 	// if dmesgs {
 	// 	dmesg("%v: %q %q: ok", origin(1), GoString(target), GoString(linkpath))
 	// }
 	return 0
 }
 
 // int chmod(const char *pathname, mode_t mode)
 func Xchmod(t *TLS, pathname uintptr, mode types.Mode_t) int32 {
 	if _, _, err := unix.Syscall(unix.SYS_CHMOD, pathname, uintptr(mode), 0); err != 0 {
 		t.setErrno(err)
 		return -1
 	}
 
 	// if dmesgs {
 	// 	dmesg("%v: %q %#o: ok", origin(1), GoString(pathname), mode)
 	// }
 	return 0
 }
 
 // int utimes(const char *filename, const struct timeval times[2]);
 func Xutimes(t *TLS, filename, times uintptr) int32 {
 	if _, _, err := unix.Syscall(unix.SYS_UTIMES, filename, times, 0); err != 0 {
 		t.setErrno(err)
 		return -1
 	}
 
 	// if dmesgs {
 	// 	dmesg("%v: %q: ok", origin(1), GoString(filename))
 	// }
 	return 0
 }
 
 // int unlink(const char *pathname);
 func Xunlink(t *TLS, pathname uintptr) int32 {
 	if _, _, err := unix.Syscall(unix.SYS_UNLINK, pathname, 0, 0); err != 0 {
 		t.setErrno(err)
 		return -1
 	}
 
 	// if dmesgs {
 	// 	dmesg("%v: %q: ok", origin(1), GoString(pathname))
 	// }
 	return 0
 }
 
 // int access(const char *pathname, int mode);
 func Xaccess(t *TLS, pathname uintptr, mode int32) int32 {
 	if _, _, err := unix.Syscall(unix.SYS_ACCESS, pathname, uintptr(mode), 0); err != 0 {
 		// if dmesgs {
 		// 	dmesg("%v: %q: %v", origin(1), GoString(pathname), err)
 		// }
 		t.setErrno(err)
 		return -1
 	}
 
 	// if dmesgs {
 	// 	dmesg("%v: %q %#o: ok", origin(1), GoString(pathname), mode)
 	// }
 	return 0
 }
 
 // int rmdir(const char *pathname);
 func Xrmdir(t *TLS, pathname uintptr) int32 {
 	if _, _, err := unix.Syscall(unix.SYS_RMDIR, pathname, 0, 0); err != 0 {
 		t.setErrno(err)
 		return -1
 	}
 
 	// if dmesgs {
 	// 	dmesg("%v: %q: ok", origin(1), GoString(pathname))
 	// }
 	return 0
 }
 
 // int rename(const char *oldpath, const char *newpath);
 func Xrename(t *TLS, oldpath, newpath uintptr) int32 {
 	if _, _, err := unix.Syscall(unix.SYS_RENAME, oldpath, newpath, 0); err != 0 {
 		t.setErrno(err)
 		return -1
 	}
 
 	return 0
 }
 
 // int mknod(const char *pathname, mode_t mode, dev_t dev);
 func Xmknod(t *TLS, pathname uintptr, mode types.Mode_t, dev types.Dev_t) int32 {
 	if _, _, err := unix.Syscall(unix.SYS_MKNOD, pathname, uintptr(mode), uintptr(dev)); err != 0 {
 		t.setErrno(err)
 		return -1
 	}
 
 	return 0
 }
 
 // int chown(const char *pathname, uid_t owner, gid_t group);
 func Xchown(t *TLS, pathname uintptr, owner types.Uid_t, group types.Gid_t) int32 {
 	if _, _, err := unix.Syscall(unix.SYS_CHOWN, pathname, uintptr(owner), uintptr(group)); err != 0 {
 		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 pipe(int pipefd[2]);
 func Xpipe(t *TLS, pipefd uintptr) int32 {
 	if _, _, err := unix.Syscall(unix.SYS_PIPE, pipefd, 0, 0); err != 0 {
 		t.setErrno(err)
 		return -1
 	}
 
 	return 0
 }
 
 // int dup2(int oldfd, int newfd);
 func Xdup2(t *TLS, oldfd, newfd int32) int32 {
 	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 {
 	n, _, err := unix.Syscall(unix.SYS_READLINK, path, buf, uintptr(bufsize))
 	if err != 0 {
 		t.setErrno(err)
 		return -1
 	}
 
 	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 = os.O_RDONLY
 	case "r+":
 		flags = os.O_RDWR
 	case "w":
 		flags = os.O_WRONLY | os.O_CREATE | os.O_TRUNC
 	case "w+":
 		flags = os.O_RDWR | os.O_CREATE | os.O_TRUNC
 	case "a":
 		flags = os.O_WRONLY | os.O_CREATE | os.O_APPEND
 	case "a+":
 		flags = os.O_RDWR | os.O_CREATE | os.O_APPEND
 	default:
 		panic(m)
 	}
 	//TODO- flags |= fcntl.O_LARGEFILE
 	fd, _, err := unix.Syscall(unix.SYS_OPEN, pathname, uintptr(flags|unix.O_LARGEFILE), 0666)
 	if err != 0 {
 		t.setErrno(err)
 		return 0
 	}
 
 	if p := newFile(t, int32(fd)); p != 0 {
 		return p
 	}
 
 	Xclose(t, int32(fd))
 	t.setErrno(errno.ENOMEM)
 	return 0
 }
 
 // int iswspace(wint_t wc);
 func Xiswspace(t *TLS, wc wctype.Wint_t) int32 {
 	return Bool32(unicode.IsSpace(rune(wc)))
 }
 
 // int iswalnum(wint_t wc);
 func Xiswalnum(t *TLS, wc wctype.Wint_t) int32 {
 	return Bool32(unicode.IsLetter(rune(wc)) || unicode.IsNumber(rune(wc)))
 }