mirror of
https://github.com/sheumann/hush.git
synced 2024-12-22 14:30:31 +00:00
131 lines
4.1 KiB
C
131 lines
4.1 KiB
C
/* vi: set sw=4 ts=4: */
|
|
/*
|
|
* password utility routines.
|
|
*
|
|
* Copyright (C) 1999-2004 by Erik Andersen <andersen@codepoet.org>
|
|
*
|
|
* Licensed under the GPL v2 or later, see the file LICENSE in this tarball.
|
|
*/
|
|
|
|
#include <stdio.h>
|
|
#include <string.h>
|
|
#include <assert.h>
|
|
#include "libbb.h"
|
|
|
|
/*
|
|
* if bufsize is > 0 char *buffer cannot be set to NULL.
|
|
* If idname is not NULL it is written on the static
|
|
* allocated buffer (and a pointer to it is returned).
|
|
* if idname is NULL, id as string is written to the static
|
|
* allocated buffer and NULL is returned.
|
|
* if bufsize is = 0 char *buffer can be set to NULL.
|
|
* If idname exists a pointer to it is returned,
|
|
* else NULL is returned.
|
|
* if bufsize is < 0 char *buffer can be set to NULL.
|
|
* If idname exists a pointer to it is returned,
|
|
* else an error message is printed and the program exits.
|
|
*/
|
|
|
|
/* internal function for bb_getpwuid and bb_getgrgid */
|
|
static char * bb_getug(char *buffer, char *idname, long id, int bufsize, char prefix)
|
|
{
|
|
if (bufsize > 0 ) {
|
|
assert(buffer!=NULL);
|
|
if(idname) {
|
|
return safe_strncpy(buffer, idname, bufsize);
|
|
}
|
|
snprintf(buffer, bufsize, "%ld", id);
|
|
} else if (bufsize < 0 && !idname) {
|
|
bb_error_msg_and_die("unknown %cid %ld", prefix, id);
|
|
}
|
|
return idname;
|
|
}
|
|
|
|
/* Hacked by Tito Ragusa (c) 2004 <farmatito@tiscali.it> to make it more
|
|
* flexible :
|
|
*
|
|
* if bufsize is > 0 char *group cannot be set to NULL.
|
|
* On success groupname is written on static allocated buffer
|
|
* group (and a pointer to it is returned).
|
|
* On failure gid as string is written to static allocated
|
|
* buffer group and NULL is returned.
|
|
* if bufsize is = 0 char *group can be set to NULL.
|
|
* On success groupname is returned.
|
|
* On failure NULL is returned.
|
|
* if bufsize is < 0 char *group can be set to NULL.
|
|
* On success groupname is returned.
|
|
* On failure an error message is printed and
|
|
* the program exits.
|
|
*/
|
|
|
|
/* gets a groupname given a gid */
|
|
char * bb_getgrgid(char *group, long gid, int bufsize)
|
|
{
|
|
struct group *mygroup = getgrgid(gid);
|
|
|
|
return bb_getug(group, (mygroup) ?
|
|
mygroup->gr_name : (char *)mygroup, gid, bufsize, 'g');
|
|
}
|
|
|
|
/* returns a gid given a group name */
|
|
long bb_xgetgrnam(const char *name)
|
|
{
|
|
struct group *mygroup;
|
|
|
|
mygroup = getgrnam(name);
|
|
if (mygroup==NULL)
|
|
bb_error_msg_and_die("unknown group name: %s", name);
|
|
|
|
return mygroup->gr_gid;
|
|
}
|
|
|
|
/* returns a uid given a username */
|
|
long bb_xgetpwnam(const char *name)
|
|
{
|
|
struct passwd *myuser;
|
|
|
|
myuser = getpwnam(name);
|
|
if (myuser==NULL)
|
|
bb_error_msg_and_die("unknown user name: %s", name);
|
|
|
|
return myuser->pw_uid;
|
|
}
|
|
|
|
/* Hacked by Tito Ragusa (c) 2004 <farmatito@tiscali.it> to make it more
|
|
* flexible :
|
|
*
|
|
* if bufsize is > 0 char *name cannot be set to NULL.
|
|
* On success username is written on the static allocated
|
|
* buffer name (and a pointer to it is returned).
|
|
* On failure uid as string is written to the static
|
|
* allocated buffer name and NULL is returned.
|
|
* if bufsize is = 0 char *name can be set to NULL.
|
|
* On success username is returned.
|
|
* On failure NULL is returned.
|
|
* if bufsize is < 0 char *name can be set to NULL
|
|
* On success username is returned.
|
|
* On failure an error message is printed and
|
|
* the program exits.
|
|
*/
|
|
|
|
/* gets a username given a uid */
|
|
char * bb_getpwuid(char *name, long uid, int bufsize)
|
|
{
|
|
struct passwd *myuser = getpwuid(uid);
|
|
|
|
return bb_getug(name, myuser ? myuser->pw_name : (char *)myuser,
|
|
uid, bufsize, 'u');
|
|
}
|
|
|
|
unsigned long get_ug_id(const char *s,
|
|
long (*__bb_getxxnam)(const char *))
|
|
{
|
|
unsigned long r;
|
|
|
|
r = bb_strtoul(s, NULL, 10);
|
|
if (errno)
|
|
r = __bb_getxxnam(s);
|
|
|
|
return r;
|
|
}
|