1 /* vi: set sw=4 ts=4: */
3 * password utility routines.
5 * Copyright (C) 1999-2004 by Erik Andersen <andersen@codepoet.org>
7 * Licensed under the GPL v2, see the file LICENSE in this tarball.
12 /* Hacked by Tito Ragusa (c) 2004 <farmatito@tiscali.it> to make it more
15 * if bufsize is > 0 char *group cannot be set to NULL.
16 * On success groupname is written on static allocated buffer
17 * group (and a pointer to it is returned).
18 * On failure gid as string is written to static allocated
19 * buffer group and NULL is returned.
20 * if bufsize is = 0 char *group can be set to NULL.
21 * On success groupname is returned.
22 * On failure NULL is returned.
23 * if bufsize is < 0 char *group can be set to NULL.
24 * On success groupname is returned.
25 * On failure an error message is printed and
32 /* gets a groupname given a gid */
33 char * bb_getgrgid(char *group, long gid, int bufsize)
35 struct group *mygroup = getgrgid(gid);
37 return bb_getug(group, (mygroup) ?
38 mygroup->gr_name : (char *)mygroup, gid, bufsize, 'g');
40 #endif /* L_bb_getgrgid */
50 /* returns a gid given a group name */
51 long bb_xgetgrnam(const char *name)
53 struct group *mygroup;
55 mygroup = getgrnam(name);
57 bb_error_msg_and_die("unknown group name: %s", name);
59 return (mygroup->gr_gid);
61 #endif /* L_bb_xgetgrnam */
71 /* returns a uid given a username */
72 long bb_xgetpwnam(const char *name)
74 struct passwd *myuser;
76 myuser = getpwnam(name);
78 bb_error_msg_and_die("unknown user name: %s", name);
80 return myuser->pw_uid;
82 #endif /* L_bb_xgetpwnam */
85 /* Hacked by Tito Ragusa (c) 2004 <farmatito@tiscali.it> to make it more
88 * if bufsize is > 0 char *name can not be set to NULL.
89 * On success username is written on the static allocated
90 * buffer name (and a pointer to it is returned).
91 * On failure uid as string is written to the static
92 * allocated buffer name and NULL is returned.
93 * if bufsize is = 0 char *name can be set to NULL.
94 * On success username is returned.
95 * On failure NULL is returned.
96 * if bufsize is < 0 char *name can be set to NULL
97 * On success username is returned.
98 * On failure an error message is printed and
105 /* gets a username given a uid */
106 char * bb_getpwuid(char *name, long uid, int bufsize)
108 struct passwd *myuser = getpwuid(uid);
110 return bb_getug(name, (myuser) ?
111 myuser->pw_name : (char *)myuser , uid, bufsize, 'u');
113 #endif /* L_bb_getpwuid */
117 * if bufsize is > 0 char *buffer can not be set to NULL.
118 * If idname is not NULL it is written on the static
119 * allocated buffer (and a pointer to it is returned).
120 * if idname is NULL, id as string is written to the static
121 * allocated buffer and NULL is returned.
122 * if bufsize is = 0 char *buffer can be set to NULL.
123 * If idname exists a pointer to it is returned,
124 * else NULL is returned.
125 * if bufsize is < 0 char *buffer can be set to NULL.
126 * If idname exists a pointer to it is returned,
127 * else an error message is printed and the program exits.
135 /* internal function for bb_getpwuid and bb_getgrgid */
136 char * bb_getug(char *buffer, char *idname, long id, int bufsize, char prefix)
139 assert(buffer!=NULL);
141 return safe_strncpy(buffer, idname, bufsize);
143 snprintf(buffer, bufsize, "%ld", id);
144 } else if(bufsize < 0 && !idname) {
145 bb_error_msg_and_die("unknown %cid %ld", prefix, id);
149 #endif /* L_bb_getug */
153 /* indirect dispatcher for pwd helpers. */
157 unsigned long get_ug_id(const char *s,
158 long (*__bb_getxxnam)(const char *))
163 r = strtoul(s, &p, 10);
164 if (*p || (s == p)) {
165 r = __bb_getxxnam(s);
170 #endif /* L_get_ug_id */
175 c-file-style: "linux"