Diff of /trunk/mkinitrd-magellan/busybox/libbb/bb_pwd.c

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	revision 983 by niro, Fri Apr 24 18:33:46 2009 UTC	revision 984 by niro, Sun May 30 11:32:42 2010 UTC
#	Line 3	Line 3
3	* password utility routines.	* password utility routines.
4	*	*
5	* Copyright (C) 1999-2004 by Erik Andersen <andersen@codepoet.org>	* Copyright (C) 1999-2004 by Erik Andersen <andersen@codepoet.org>
6		* Copyright (C) 2008 by Tito Ragusa <farmatito@tiscali.it>
7	*	*
8	* Licensed under the GPL v2 or later, see the file LICENSE in this tarball.	* Licensed under the GPL v2 or later, see the file LICENSE in this tarball.
9	*/	*/
10
11	#include "libbb.h"	#include "libbb.h"
12
13	#define assert(x) ((void)0)	/* TODO: maybe change API to return malloced data?
14		* This will allow to stop using libc functions returning
15	/* internal function for bb_getpwuid and bb_getgrgid */	* pointers to static data (getpwuid)
	/* Hacked by Tito Ragusa (c) 2004 <farmatito@tiscali.it> to make it more
	* flexible:
	*
	* bufsize > 0:      If idname is not NULL it is copied to buffer,
	*                   and buffer is returned. Else id as string is written
	*                   to buffer, and NULL is returned.
	*
	* bufsize == 0:     idname is returned.
	*
	* bufsize < 0:      If idname is not NULL it is returned.
	*                   Else an error message is printed and the program exits.
16	*/	*/
17	static char* bb_getug(char *buffer, int bufsize, char *idname, long id, char prefix)
18		struct passwd* FAST_FUNC xgetpwnam(const char *name)
19	{	{
20	if (bufsize > 0) {	struct passwd *pw = getpwnam(name);
21	assert(buffer != NULL);	if (!pw)
22	if (idname) {	bb_error_msg_and_die("unknown user %s", name);
23	return safe_strncpy(buffer, idname, bufsize);	return pw;
24	}	}
25	snprintf(buffer, bufsize, "%ld", id);
26	} else if (bufsize < 0 && !idname) {	struct group* FAST_FUNC xgetgrnam(const char *name)
	bb_error_msg_and_die("unknown %cid %ld", prefix, id);
	}
	return idname;
	}
	/* bb_getpwuid, bb_getgrgid:
	* bb_getXXXid(buf, bufsz, id) - copy user/group name or id
	*               as a string to buf, return user/group name or NULL
	* bb_getXXXid(NULL, 0, id) - return user/group name or NULL
	* bb_getXXXid(NULL, -1, id) - return user/group name or exit
	*/
	/* gets a username given a uid */
	char* FAST_FUNC bb_getpwuid(char *name, int bufsize, long uid)
27	{	{
28	struct passwd *myuser = getpwuid(uid);	struct group *gr = getgrnam(name);
29		if (!gr)
30		bb_error_msg_and_die("unknown group %s", name);
31		return gr;
32		}
33
34	return bb_getug(name, bufsize,
35	(myuser ? myuser->pw_name : (char*)myuser),	struct passwd* FAST_FUNC xgetpwuid(uid_t uid)
36	uid, 'u');	{
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	/* gets a groupname given a gid */
43	char* FAST_FUNC bb_getgrgid(char *group, int bufsize, long gid)	struct group* FAST_FUNC xgetgrgid(gid_t gid)
44	{	{
45	struct group *mygroup = getgrgid(gid);	struct group *gr = getgrgid(gid);
46		if (!gr)
47		bb_error_msg_and_die("unknown gid %u", (unsigned)gid);
48		return gr;
49		}
50
51	return bb_getug(group, bufsize,	char* FAST_FUNC xuid2uname(uid_t uid)
52	(mygroup ? mygroup->gr_name : (char*)mygroup),	{
53	gid, 'g');	struct passwd *pw = xgetpwuid(uid);
54		return pw->pw_name;
55	}	}
56
57	/* returns a gid given a group name */	char* FAST_FUNC xgid2group(gid_t gid)
	long FAST_FUNC xgroup2gid(const char *name)
58	{	{
59	struct group *mygroup;	struct group *gr = xgetgrgid(gid);
60		return gr->gr_name;
61		}
62
63	mygroup = getgrnam(name);	char* FAST_FUNC uid2uname(uid_t uid)
64	if (mygroup == NULL)	{
65	bb_error_msg_and_die("unknown group name: %s", name);	struct passwd *pw = getpwuid(uid);
66		return (pw) ? pw->pw_name : NULL;
67		}
68
69	return mygroup->gr_gid;	char* FAST_FUNC gid2group(gid_t gid)
70		{
71		struct group *gr = getgrgid(gid);
72		return (gr) ? gr->gr_name : NULL;
73		}
74
75		char* FAST_FUNC uid2uname_utoa(long uid)
76		{
77		char *name = uid2uname(uid);
78		return (name) ? name : utoa(uid);
79		}
80
81		char* FAST_FUNC gid2group_utoa(long gid)
82		{
83		char *name = gid2group(gid);
84		return (name) ? name : utoa(gid);
85	}	}
86
	/* returns a uid given a username */
87	long FAST_FUNC xuname2uid(const char *name)	long FAST_FUNC xuname2uid(const char *name)
88	{	{
89	struct passwd *myuser;	struct passwd *myuser;
90
91	myuser = getpwnam(name);	myuser = xgetpwnam(name);
	if (myuser == NULL)
	bb_error_msg_and_die("unknown user %s", name);
92	return myuser->pw_uid;	return myuser->pw_uid;
93	}	}
94
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
103	unsigned long FAST_FUNC get_ug_id(const char *s,	unsigned long FAST_FUNC get_ug_id(const char *s,
104	long FAST_FUNC (*xname2id)(const char *))	long FAST_FUNC (*xname2id)(const char *))
105	{	{

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