busybox/libbb/bb_pwd.c
Denys Vlasenko 39194f0309 new NOFORKs: pwdx,kill[all5],ttysize,realpath,readlink NOEXECs: date,resize
function                                             old     new   delta
run_nofork_applet                                    258     280     +22
readlink_main                                        112     123     +11
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 2/0 up/down: 33/0)               Total: 33 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-08-03 19:03:32 +02:00

114 lines
2.3 KiB
C

/* vi: set sw=4 ts=4: */
/*
* password utility routines.
*
* Copyright (C) 1999-2004 by Erik Andersen <andersen@codepoet.org>
* Copyright (C) 2008 by Tito Ragusa <farmatito@tiscali.it>
*
* Licensed under GPLv2 or later, see file LICENSE in this source tree.
*/
#include "libbb.h"
/* TODO: maybe change API to return malloced data?
* This will allow to stop using libc functions returning
* pointers to static data (getpwuid)
*/
struct passwd* FAST_FUNC xgetpwnam(const char *name)
{
struct passwd *pw = getpwnam(name);
if (!pw)
bb_error_msg_and_die("unknown user %s", name);
return pw;
}
struct group* FAST_FUNC xgetgrnam(const char *name)
{
struct group *gr = getgrnam(name);
if (!gr)
bb_error_msg_and_die("unknown group %s", name);
return gr;
}
struct passwd* FAST_FUNC xgetpwuid(uid_t uid)
{
/* Note: used in nofork applets (whoami), be careful not to leak anything */
struct passwd *pw = getpwuid(uid);
if (!pw)
bb_error_msg_and_die("unknown uid %u", (unsigned)uid);
return pw;
}
struct group* FAST_FUNC xgetgrgid(gid_t gid)
{
struct group *gr = getgrgid(gid);
if (!gr)
bb_error_msg_and_die("unknown gid %u", (unsigned)gid);
return gr;
}
char* FAST_FUNC xuid2uname(uid_t uid)
{
/* Note: used in nofork applets (whoami), be careful not to leak anything */
struct passwd *pw = xgetpwuid(uid);
return pw->pw_name;
}
char* FAST_FUNC xgid2group(gid_t gid)
{
struct group *gr = xgetgrgid(gid);
return gr->gr_name;
}
char* FAST_FUNC uid2uname(uid_t uid)
{
struct passwd *pw = getpwuid(uid);
return (pw) ? pw->pw_name : NULL;
}
char* FAST_FUNC gid2group(gid_t gid)
{
struct group *gr = getgrgid(gid);
return (gr) ? gr->gr_name : NULL;
}
char* FAST_FUNC uid2uname_utoa(uid_t uid)
{
char *name = uid2uname(uid);
return (name) ? name : utoa(uid);
}
char* FAST_FUNC gid2group_utoa(gid_t gid)
{
char *name = gid2group(gid);
return (name) ? name : utoa(gid);
}
long FAST_FUNC xuname2uid(const char *name)
{
struct passwd *myuser;
myuser = xgetpwnam(name);
return myuser->pw_uid;
}
long FAST_FUNC xgroup2gid(const char *name)
{
struct group *mygroup;
mygroup = xgetgrnam(name);
return mygroup->gr_gid;
}
unsigned long FAST_FUNC get_ug_id(const char *s,
long FAST_FUNC (*xname2id)(const char *))
{
unsigned long r;
r = bb_strtoul(s, NULL, 10);
if (errno)
return xname2id(s);
return r;
}