1 // Copyright 2009 The Go Authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style 3 // license that can be found in the LICENSE file. 4 5 package syscall 6 7 import "unsafe" 8 9 const ( 10 _SYS_dup = SYS_DUP2 11 _SYS_setgroups = SYS_SETGROUPS32 12 ) 13 14 func setTimespec(sec, nsec int64) Timespec { 15 return Timespec{Sec: int32(sec), Nsec: int32(nsec)} 16 } 17 18 func setTimeval(sec, usec int64) Timeval { 19 return Timeval{Sec: int32(sec), Usec: int32(usec)} 20 } 21 22 func Pipe(p []int) (err error) { 23 if len(p) != 2 { 24 return EINVAL 25 } 26 var pp [2]_C_int 27 err = pipe2(&pp, 0) 28 p[0] = int(pp[0]) 29 p[1] = int(pp[1]) 30 return 31 } 32 33 //sysnb pipe2(p *[2]_C_int, flags int) (err error) 34 35 func Pipe2(p []int, flags int) (err error) { 36 if len(p) != 2 { 37 return EINVAL 38 } 39 var pp [2]_C_int 40 err = pipe2(&pp, flags) 41 p[0] = int(pp[0]) 42 p[1] = int(pp[1]) 43 return 44 } 45 46 // Underlying system call writes to newoffset via pointer. 47 // Implemented in assembly to avoid allocation. 48 func seek(fd int, offset int64, whence int) (newoffset int64, err Errno) 49 50 func Seek(fd int, offset int64, whence int) (newoffset int64, err error) { 51 newoffset, errno := seek(fd, offset, whence) 52 if errno != 0 { 53 return 0, errno 54 } 55 return newoffset, nil 56 } 57 58 //sys accept(s int, rsa *RawSockaddrAny, addrlen *_Socklen) (fd int, err error) 59 //sys accept4(s int, rsa *RawSockaddrAny, addrlen *_Socklen, flags int) (fd int, err error) 60 //sys bind(s int, addr unsafe.Pointer, addrlen _Socklen) (err error) 61 //sys connect(s int, addr unsafe.Pointer, addrlen _Socklen) (err error) 62 //sysnb getgroups(n int, list *_Gid_t) (nn int, err error) = SYS_GETGROUPS32 63 //sysnb setgroups(n int, list *_Gid_t) (err error) = SYS_SETGROUPS32 64 //sys getsockopt(s int, level int, name int, val unsafe.Pointer, vallen *_Socklen) (err error) 65 //sys setsockopt(s int, level int, name int, val unsafe.Pointer, vallen uintptr) (err error) 66 //sysnb socket(domain int, typ int, proto int) (fd int, err error) 67 //sysnb getpeername(fd int, rsa *RawSockaddrAny, addrlen *_Socklen) (err error) 68 //sysnb getsockname(fd int, rsa *RawSockaddrAny, addrlen *_Socklen) (err error) 69 //sys recvfrom(fd int, p []byte, flags int, from *RawSockaddrAny, fromlen *_Socklen) (n int, err error) 70 //sys sendto(s int, buf []byte, flags int, to unsafe.Pointer, addrlen _Socklen) (err error) 71 //sysnb socketpair(domain int, typ int, flags int, fd *[2]int32) (err error) 72 //sys recvmsg(s int, msg *Msghdr, flags int) (n int, err error) 73 //sys sendmsg(s int, msg *Msghdr, flags int) (n int, err error) 74 75 // 64-bit file system and 32-bit uid calls 76 // (16-bit uid calls are not always supported in newer kernels) 77 //sys Dup2(oldfd int, newfd int) (err error) 78 //sys Fchown(fd int, uid int, gid int) (err error) = SYS_FCHOWN32 79 //sys Fstat(fd int, stat *Stat_t) (err error) = SYS_FSTAT64 80 //sysnb Getegid() (egid int) = SYS_GETEGID32 81 //sysnb Geteuid() (euid int) = SYS_GETEUID32 82 //sysnb Getgid() (gid int) = SYS_GETGID32 83 //sysnb Getuid() (uid int) = SYS_GETUID32 84 //sysnb InotifyInit() (fd int, err error) 85 //sys Lchown(path string, uid int, gid int) (err error) = SYS_LCHOWN32 86 //sys Listen(s int, n int) (err error) 87 //sys Lstat(path string, stat *Stat_t) (err error) = SYS_LSTAT64 88 //sys sendfile(outfd int, infd int, offset *int64, count int) (written int, err error) = SYS_SENDFILE64 89 //sys Select(nfd int, r *FdSet, w *FdSet, e *FdSet, timeout *Timeval) (n int, err error) = SYS__NEWSELECT 90 //sys Setfsgid(gid int) (err error) = SYS_SETFSGID32 91 //sys Setfsuid(uid int) (err error) = SYS_SETFSUID32 92 //sysnb Setregid(rgid int, egid int) (err error) = SYS_SETREGID32 93 //sysnb Setresgid(rgid int, egid int, sgid int) (err error) = SYS_SETRESGID32 94 //sysnb Setresuid(ruid int, euid int, suid int) (err error) = SYS_SETRESUID32 95 //sysnb Setreuid(ruid int, euid int) (err error) = SYS_SETREUID32 96 //sys Shutdown(fd int, how int) (err error) 97 //sys Splice(rfd int, roff *int64, wfd int, woff *int64, len int, flags int) (n int, err error) 98 //sys Stat(path string, stat *Stat_t) (err error) = SYS_STAT64 99 100 // Vsyscalls on amd64. 101 //sysnb Gettimeofday(tv *Timeval) (err error) 102 //sysnb Time(t *Time_t) (tt Time_t, err error) 103 104 //sys Pread(fd int, p []byte, offset int64) (n int, err error) = SYS_PREAD64 105 //sys Pwrite(fd int, p []byte, offset int64) (n int, err error) = SYS_PWRITE64 106 //sys Truncate(path string, length int64) (err error) = SYS_TRUNCATE64 107 //sys Ftruncate(fd int, length int64) (err error) = SYS_FTRUNCATE64 108 109 //sys mmap2(addr uintptr, length uintptr, prot int, flags int, fd int, pageOffset uintptr) (xaddr uintptr, err error) 110 111 func Fstatfs(fd int, buf *Statfs_t) (err error) { 112 _, _, e := Syscall(SYS_FSTATFS64, uintptr(fd), unsafe.Sizeof(*buf), uintptr(unsafe.Pointer(buf))) 113 if e != 0 { 114 err = e 115 } 116 return 117 } 118 119 func Statfs(path string, buf *Statfs_t) (err error) { 120 pathp, err := BytePtrFromString(path) 121 if err != nil { 122 return err 123 } 124 _, _, e := Syscall(SYS_STATFS64, uintptr(unsafe.Pointer(pathp)), unsafe.Sizeof(*buf), uintptr(unsafe.Pointer(buf))) 125 if e != 0 { 126 err = e 127 } 128 return 129 } 130 131 func mmap(addr uintptr, length uintptr, prot int, flags int, fd int, offset int64) (xaddr uintptr, err error) { 132 page := uintptr(offset / 4096) 133 if offset != int64(page)*4096 { 134 return 0, EINVAL 135 } 136 return mmap2(addr, length, prot, flags, fd, page) 137 } 138 139 type rlimit32 struct { 140 Cur uint32 141 Max uint32 142 } 143 144 //sysnb getrlimit(resource int, rlim *rlimit32) (err error) = SYS_GETRLIMIT 145 146 const rlimInf32 = ^uint32(0) 147 const rlimInf64 = ^uint64(0) 148 149 func Getrlimit(resource int, rlim *Rlimit) (err error) { 150 err = prlimit(0, resource, nil, rlim) 151 if err != ENOSYS { 152 return err 153 } 154 155 rl := rlimit32{} 156 err = getrlimit(resource, &rl) 157 if err != nil { 158 return 159 } 160 161 if rl.Cur == rlimInf32 { 162 rlim.Cur = rlimInf64 163 } else { 164 rlim.Cur = uint64(rl.Cur) 165 } 166 167 if rl.Max == rlimInf32 { 168 rlim.Max = rlimInf64 169 } else { 170 rlim.Max = uint64(rl.Max) 171 } 172 return 173 } 174 175 //sysnb setrlimit(resource int, rlim *rlimit32) (err error) = SYS_SETRLIMIT 176 177 func Setrlimit(resource int, rlim *Rlimit) (err error) { 178 err = prlimit(0, resource, rlim, nil) 179 if err != ENOSYS { 180 return err 181 } 182 183 rl := rlimit32{} 184 if rlim.Cur == rlimInf64 { 185 rl.Cur = rlimInf32 186 } else if rlim.Cur < uint64(rlimInf32) { 187 rl.Cur = uint32(rlim.Cur) 188 } else { 189 return EINVAL 190 } 191 if rlim.Max == rlimInf64 { 192 rl.Max = rlimInf32 193 } else if rlim.Max < uint64(rlimInf32) { 194 rl.Max = uint32(rlim.Max) 195 } else { 196 return EINVAL 197 } 198 199 return setrlimit(resource, &rl) 200 } 201 202 func (r *PtraceRegs) PC() uint64 { return uint64(r.Uregs[15]) } 203 204 func (r *PtraceRegs) SetPC(pc uint64) { r.Uregs[15] = uint32(pc) } 205 206 func (iov *Iovec) SetLen(length int) { 207 iov.Len = uint32(length) 208 } 209 210 func (msghdr *Msghdr) SetControllen(length int) { 211 msghdr.Controllen = uint32(length) 212 } 213 214 func (cmsg *Cmsghdr) SetLen(length int) { 215 cmsg.Len = uint32(length) 216 } 217 218 func rawVforkSyscall(trap, a1 uintptr) (r1 uintptr, err Errno) { 219 panic("not implemented") 220 } 221
