1 /* vi: set sw=4 ts=4: */
2 /*
3  * password utility routines.
4  *
5  * Copyright (C) 1999-2004 by Erik Andersen <andersen@codepoet.org>
6  * Copyright (C) 2008 by Tito Ragusa <farmatito@tiscali.it>
7  *
8  * Licensed under GPLv2 or later, see file LICENSE in this source tree.
9  */
10 
11 #include "libbb.h"
12 
13 /* TODO: maybe change API to return malloced data?
14  * This will allow to stop using libc functions returning
15  * pointers to static data (getpwuid)
16  */
17 
xgetpwnam(const char * name)18 struct passwd* FAST_FUNC xgetpwnam(const char *name)
19 {
20 	struct passwd *pw = getpwnam(name);
21 	if (!pw)
22 		bb_error_msg_and_die("unknown user %s", name);
23 	return pw;
24 }
25 
xgetgrnam(const char * name)26 struct group* FAST_FUNC xgetgrnam(const char *name)
27 {
28 	struct group *gr = getgrnam(name);
29 	if (!gr)
30 		bb_error_msg_and_die("unknown group %s", name);
31 	return gr;
32 }
33 
34 
xgetpwuid(uid_t uid)35 struct passwd* FAST_FUNC xgetpwuid(uid_t uid)
36 {
37 	struct passwd *pw = getpwuid(uid);
38 	if (!pw)
39 		bb_error_msg_and_die("unknown uid %u", (unsigned)uid);
40 	return pw;
41 }
42 
xgetgrgid(gid_t gid)43 struct group* FAST_FUNC xgetgrgid(gid_t gid)
44 {
45 	struct group *gr = getgrgid(gid);
46 	if (!gr)
47 		bb_error_msg_and_die("unknown gid %u", (unsigned)gid);
48 	return gr;
49 }
50 
xuid2uname(uid_t uid)51 char* FAST_FUNC xuid2uname(uid_t uid)
52 {
53 	struct passwd *pw = xgetpwuid(uid);
54 	return pw->pw_name;
55 }
56 
xgid2group(gid_t gid)57 char* FAST_FUNC xgid2group(gid_t gid)
58 {
59 	struct group *gr = xgetgrgid(gid);
60 	return gr->gr_name;
61 }
62 
uid2uname(uid_t uid)63 char* FAST_FUNC uid2uname(uid_t uid)
64 {
65 	struct passwd *pw = getpwuid(uid);
66 	return (pw) ? pw->pw_name : NULL;
67 }
68 
gid2group(gid_t gid)69 char* FAST_FUNC gid2group(gid_t gid)
70 {
71 	struct group *gr = getgrgid(gid);
72 	return (gr) ? gr->gr_name : NULL;
73 }
74 
uid2uname_utoa(uid_t uid)75 char* FAST_FUNC uid2uname_utoa(uid_t uid)
76 {
77 	char *name = uid2uname(uid);
78 	return (name) ? name : utoa(uid);
79 }
80 
gid2group_utoa(gid_t gid)81 char* FAST_FUNC gid2group_utoa(gid_t gid)
82 {
83 	char *name = gid2group(gid);
84 	return (name) ? name : utoa(gid);
85 }
86 
xuname2uid(const char * name)87 long FAST_FUNC xuname2uid(const char *name)
88 {
89 	struct passwd *myuser;
90 
91 	myuser = xgetpwnam(name);
92 	return myuser->pw_uid;
93 }
94 
xgroup2gid(const char * name)95 long FAST_FUNC xgroup2gid(const char *name)
96 {
97 	struct group *mygroup;
98 
99 	mygroup = xgetgrnam(name);
100 	return mygroup->gr_gid;
101 }
102 
get_ug_id(const char * s,long FAST_FUNC (* xname2id)(const char *))103 unsigned long FAST_FUNC get_ug_id(const char *s,
104 		long FAST_FUNC (*xname2id)(const char *))
105 {
106 	unsigned long r;
107 
108 	r = bb_strtoul(s, NULL, 10);
109 	if (errno)
110 		return xname2id(s);
111 	return r;
112 }
113