How to use isSupportedOpenAt method of host Package

Best Syzkaller code snippet using host.isSupportedOpenAt

host.go

Source:host.go

...44	if strings.HasPrefix(c.Name, "open$") {45		return isSupportedOpen(c)46	}47	if strings.HasPrefix(c.Name, "openat$") {48		return isSupportedOpenAt(c)49	}50	if len(kallsyms) == 0 {51		return true52	}53	return bytes.Index(kallsyms, []byte(" T sys_"+c.CallName+"\n")) != -154}55func isSupportedSyzkall(c *sys.Call) bool {56	switch c.CallName {57	case "syz_test":58		return false59	case "syz_open_dev":60		if _, ok := c.Args[0].(*sys.ConstType); ok {61			// This is for syz_open_dev$char/block.62			// They are currently commented out, but in case one enables them.63			return true64		}65		fname, ok := extractStringConst(c.Args[0])66		if !ok {67			panic("first open arg is not a pointer to string const")68		}69		if syscall.Getuid() != 0 {70			return false71		}72		var check func(dev string) bool73		check = func(dev string) bool {74			if !strings.Contains(dev, "#") {75				_, err := os.Stat(dev)76				return err == nil77			}78			for i := 0; i < 10; i++ {79				if check(strings.Replace(dev, "#", strconv.Itoa(i), 1)) {80					return true81				}82			}83			return false84		}85		return check(fname)86	case "syz_open_pts":87		return true88	case "syz_fuse_mount":89		_, err := os.Stat("/dev/fuse")90		return err == nil91	case "syz_fuseblk_mount":92		_, err := os.Stat("/dev/fuse")93		return err == nil && syscall.Getuid() == 094	case "syz_emit_ethernet":95		fd, err := syscall.Open("/dev/net/tun", syscall.O_RDWR, 0)96		if err == nil {97			syscall.Close(fd)98		}99		return err == nil && syscall.Getuid() == 0100	case "syz_kvm_setup_cpu":101		switch c.Name {102		case "syz_kvm_setup_cpu$x86":103			return runtime.GOARCH == "amd64" || runtime.GOARCH == "386"104		case "syz_kvm_setup_cpu$arm64":105			return runtime.GOARCH == "arm64"106		}107	}108	panic("unknown syzkall: " + c.Name)109}110func isSupportedSocket(c *sys.Call) bool {111	af, ok := c.Args[0].(*sys.ConstType)112	if !ok {113		println(c.Name)114		panic("socket family is not const")115	}116	fd, err := syscall.Socket(int(af.Val), 0, 0)117	if fd != -1 {118		syscall.Close(fd)119	}120	return err != syscall.ENOSYS && err != syscall.EAFNOSUPPORT121}122func isSupportedOpen(c *sys.Call) bool {123	fname, ok := extractStringConst(c.Args[0])124	if !ok {125		return true126	}127	fd, err := syscall.Open(fname, syscall.O_RDONLY, 0)128	if fd != -1 {129		syscall.Close(fd)130	}131	return err == nil132}133func isSupportedOpenAt(c *sys.Call) bool {134	fname, ok := extractStringConst(c.Args[1])135	if !ok {136		return true137	}138	fd, err := syscall.Open(fname, syscall.O_RDONLY, 0)139	if fd != -1 {140		syscall.Close(fd)141	}142	return err == nil143}144func extractStringConst(typ sys.Type) (string, bool) {145	ptr, ok := typ.(*sys.PtrType)146	if !ok {147		panic("first open arg is not a pointer to string const")...

host_linux.go

Source:host_linux.go

...41	if strings.HasPrefix(c.Name, "open$") {42		return isSupportedOpen(c)43	}44	if strings.HasPrefix(c.Name, "openat$") {45		return isSupportedOpenAt(c)46	}47	if len(kallsyms) == 0 {48		return true49	}50	return bytes.Index(kallsyms, []byte(" T sys_"+c.CallName+"\n")) != -151}52func isSupportedSyzkall(c *prog.Syscall) bool {53	switch c.CallName {54	case "syz_test":55		return false56	case "syz_open_dev":57		if _, ok := c.Args[0].(*prog.ConstType); ok {58			// This is for syz_open_dev$char/block.59			// They are currently commented out, but in case one enables them.60			return true61		}62		fname, ok := extractStringConst(c.Args[0])63		if !ok {64			panic("first open arg is not a pointer to string const")65		}66		if syscall.Getuid() != 0 {67			return false68		}69		var check func(dev string) bool70		check = func(dev string) bool {71			if !strings.Contains(dev, "#") {72				return osutil.IsExist(dev)73			}74			for i := 0; i < 10; i++ {75				if check(strings.Replace(dev, "#", strconv.Itoa(i), 1)) {76					return true77				}78			}79			return false80		}81		return check(fname)82	case "syz_open_pts":83		return true84	case "syz_fuse_mount":85		return osutil.IsExist("/dev/fuse")86	case "syz_fuseblk_mount":87		return osutil.IsExist("/dev/fuse") && syscall.Getuid() == 088	case "syz_emit_ethernet", "syz_extract_tcp_res":89		fd, err := syscall.Open("/dev/net/tun", syscall.O_RDWR, 0)90		if err == nil {91			syscall.Close(fd)92		}93		return err == nil && syscall.Getuid() == 094	case "syz_kvm_setup_cpu":95		switch c.Name {96		case "syz_kvm_setup_cpu$x86":97			return runtime.GOARCH == "amd64" || runtime.GOARCH == "386"98		case "syz_kvm_setup_cpu$arm64":99			return runtime.GOARCH == "arm64"100		}101	}102	panic("unknown syzkall: " + c.Name)103}104func isSupportedSocket(c *prog.Syscall) bool {105	af, ok := c.Args[0].(*prog.ConstType)106	if !ok {107		println(c.Name)108		panic("socket family is not const")109	}110	fd, err := syscall.Socket(int(af.Val), 0, 0)111	if fd != -1 {112		syscall.Close(fd)113	}114	return err != syscall.ENOSYS && err != syscall.EAFNOSUPPORT115}116func isSupportedOpen(c *prog.Syscall) bool {117	fname, ok := extractStringConst(c.Args[0])118	if !ok {119		return true120	}121	fd, err := syscall.Open(fname, syscall.O_RDONLY, 0)122	if fd != -1 {123		syscall.Close(fd)124	}125	return err == nil126}127func isSupportedOpenAt(c *prog.Syscall) bool {128	fname, ok := extractStringConst(c.Args[1])129	if !ok {130		return true131	}132	fd, err := syscall.Open(fname, syscall.O_RDONLY, 0)133	if fd != -1 {134		syscall.Close(fd)135	}136	return err == nil137}138func extractStringConst(typ prog.Type) (string, bool) {139	ptr, ok := typ.(*prog.PtrType)140	if !ok {141		panic("first open arg is not a pointer to string const")...

isSupportedOpenAt

Using AI Code Generation

1import (2func isSupportedOpenAt() bool {3}4func openat(dirfd int, path string, flags int, mode uint32) (int, error) {5	return syscall.Openat(dirfd, path, flags, mode)6}7import (8func isSupportedOpenAt() bool {9}10func openat(dirfd int, path string, flags int, mode uint32) (int, error) {11	return syscall.Open(path, flags, mode)12}13import "syscall"14func openat(dirfd int, path string, flags int, mode uint32) (int, error) {15	return syscall.Openat(dirfd, path, flags, mode)16}17import "syscall"18func openat(dirfd int, path string, flags int, mode uint32) (int, error) {19	return syscall.Open(path, flags, mode)20}21import "syscall"22func openat(dirfd int, path string, flags int, mode uint32) (int, error) {23	return syscall.Openat(dirfd, path, flags, mode)24}25import "syscall"26func openat(dirfd int, path string, flags int, mode uint32) (int, error) {27	return syscall.Open(path, flags, mode)28}29import "syscall"30func openat(dirfd int, path string, flags int, mode uint32) (int, error) {31	return syscall.Openat(dirfd, path, flags, mode)32}33import "syscall"34func openat(dirfd int, path string, flags int, mode uint32) (int, error) {35	return syscall.Open(path, flags, mode)36}37import "syscall"38func openat(dirfd int

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