1 // Copyright 2011 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.
17 #include <sys/types.h>
21 static int mygetpwuid_r(int uid, struct passwd *pwd,
22 char *buf, size_t buflen, struct passwd **result) {
23 return getpwuid_r(uid, pwd, buf, buflen, result);
27 func libc_getpwnam_r(name *byte, pwd *syscall.Passwd, buf *byte, buflen syscall.Size_t, result **syscall.Passwd) int __asm__ ("getpwnam_r")
28 func libc_getpwuid_r(uid syscall.Uid_t, pwd *syscall.Passwd, buf *byte, buflen syscall.Size_t, result **syscall.Passwd) int __asm__ ("getpwuid_r")
30 // bytePtrToString takes a NUL-terminated array of bytes and convert
32 func bytePtrToString(p *byte) string {
33 a := (*[10000]byte)(unsafe.Pointer(p))
45 // Lookup looks up a user by username. If the user cannot be found,
46 // the returned error is of type UnknownUserError.
47 func Lookup(username string) (*User, os.Error) {
48 return lookup(-1, username, true)
51 // LookupId looks up a user by userid. If the user cannot be found,
52 // the returned error is of type UnknownUserIdError.
53 func LookupId(uid int) (*User, os.Error) {
54 return lookup(uid, "", false)
57 func lookup(uid int, username string, lookupByName bool) (*User, os.Error) {
58 var pwd syscall.Passwd
59 var result *syscall.Passwd
61 // FIXME: Should let buf grow if necessary.
63 buf := make([]byte, bufSize)
65 rv := libc_getpwnam_r(syscall.StringBytePtr(username),
71 return nil, fmt.Errorf("user: lookup username %s: %s", username, os.Errno(syscall.GetErrno()))
74 return nil, UnknownUserError(username)
77 rv := libc_getpwuid_r(syscall.Uid_t(uid),
83 return nil, fmt.Errorf("user: lookup userid %d: %s", uid, os.Errno(syscall.GetErrno()))
86 return nil, UnknownUserIdError(uid)
92 Username: bytePtrToString((*byte)(unsafe.Pointer(pwd.Pw_name))),
93 Name: bytePtrToString((*byte)(unsafe.Pointer(pwd.Pw_gecos))),
94 HomeDir: bytePtrToString((*byte)(unsafe.Pointer(pwd.Pw_dir))),
96 // The pw_gecos field isn't quite standardized. Some docs
97 // say: "It is expected to be a comma separated list of
98 // personal data where the first item is the full name of the
100 if i := strings.Index(u.Name, ","); i >= 0 {