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.
13 /* Hacked by Tito Ragusa (c) 2004 <farmatito@tiscali.it> to make it more
16 * if bufsize is > 0 char *group cannot be set to NULL.
17 * On success groupname is written on static allocated buffer
18 * group (and a pointer to it is returned).
19 * On failure gid as string is written to static allocated
20 * buffer group and NULL is returned.
21 * if bufsize is = 0 char *group can be set to NULL.
22 * On success groupname is returned.
23 * On failure NULL is returned.
24 * if bufsize is < 0 char *group can be set to NULL.
25 * On success groupname is returned.
26 * 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 */
49 /* returns a gid given a group name */
50 long bb_xgetgrnam(const char *name)
52 struct group *mygroup;
54 mygroup = getgrnam(name);
56 bb_error_msg_and_die("unknown group name: %s", name);
58 return (mygroup->gr_gid);
60 #endif /* L_bb_xgetgrnam */
69 /* returns a uid given a username */
70 long bb_xgetpwnam(const char *name)
72 struct passwd *myuser;
74 myuser = getpwnam(name);
76 bb_error_msg_and_die("unknown user name: %s", name);
78 return myuser->pw_uid;
80 #endif /* L_bb_xgetpwnam */
83 /* Hacked by Tito Ragusa (c) 2004 <farmatito@tiscali.it> to make it more
86 * if bufsize is > 0 char *name can not be set to NULL.
87 * On success username is written on the static allocated
88 * buffer name (and a pointer to it is returned).
89 * On failure uid as string is written to the static
90 * allocated buffer name and NULL is returned.
91 * if bufsize is = 0 char *name can be set to NULL.
92 * On success username is returned.
93 * On failure NULL is returned.
94 * if bufsize is < 0 char *name can be set to NULL
95 * On success username is returned.
96 * On failure an error message is printed and
102 /* gets a username given a uid */
103 char * bb_getpwuid(char *name, long uid, int bufsize)
105 struct passwd *myuser = getpwuid(uid);
107 return bb_getug(name, (myuser) ?
108 myuser->pw_name : (char *)myuser , uid, bufsize, 'u');
110 #endif /* L_bb_getpwuid */
114 * if bufsize is > 0 char *buffer can not be set to NULL.
115 * If idname is not NULL it is written on the static
116 * allocated buffer (and a pointer to it is returned).
117 * if idname is NULL, id as string is written to the static
118 * allocated buffer and NULL is returned.
119 * if bufsize is = 0 char *buffer can be set to NULL.
120 * If idname exists a pointer to it is returned,
121 * else 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 an error message is printed and the program exits.
131 /* internal function for bb_getpwuid and bb_getgrgid */
132 char * bb_getug(char *buffer, char *idname, long id, int bufsize, char prefix)
135 assert(buffer!=NULL);
137 return safe_strncpy(buffer, idname, bufsize);
139 snprintf(buffer, bufsize, "%ld", id);
140 } else if(bufsize < 0 && !idname) {
141 bb_error_msg_and_die("unknown %cid %ld", prefix, id);
145 #endif /* L_bb_getug */
149 /* indirect dispatcher for pwd helpers. */
152 extern unsigned long get_ug_id(const char *s,
153 long (*__bb_getxxnam)(const char *))
158 r = strtoul(s, &p, 10);
159 if (*p || (s == p)) {
160 r = __bb_getxxnam(s);
165 #endif /* L_get_ug_id */
170 c-file-style: "linux"