LXR busybox/libbb/bb

   1/* vi: set sw=4 ts=4: */
   2/*
   3 * password utility routines.
   4 *
   5 * Copyright (C) 1999-2004 by Erik Andersen <andersen@codepoet.org>
   6 * Copyright (C) 2008 by Tito Ragusa <farmatito@tiscali.it>
   7 *
   8 * Licensed under GPLv2 or later, see file LICENSE in this source tree.
   9 */
  10#include "libbb.h"
  11
  12/* TODO: maybe change API to return malloced data?
  13 * This will allow to stop using libc functions returning
  14 * pointers to static data (getpwuid)
  15 */
  16
  17struct passwd* FAST_FUNC xgetpwnam(const char *name)
  18{
  19        struct passwd *pw = getpwnam(name);
  20        if (!pw)
  21                bb_error_msg_and_die("unknown user %s", name);
  22        return pw;
  23}
  24
  25struct group* FAST_FUNC xgetgrnam(const char *name)
  26{
  27        struct group *gr = getgrnam(name);
  28        if (!gr)
  29                bb_error_msg_and_die("unknown group %s", name);
  30        return gr;
  31}
  32
  33struct passwd* FAST_FUNC xgetpwuid(uid_t uid)
  34{
  35        /* Note: used in nofork applets (whoami), be careful not to leak anything */
  36        struct passwd *pw = getpwuid(uid);
  37        if (!pw)
  38                bb_error_msg_and_die("unknown uid %u", (unsigned)uid);
  39        return pw;
  40}
  41
  42struct group* FAST_FUNC xgetgrgid(gid_t gid)
  43{
  44        struct group *gr = getgrgid(gid);
  45        if (!gr)
  46                bb_error_msg_and_die("unknown gid %u", (unsigned)gid);
  47        return gr;
  48}
  49
  50char* FAST_FUNC xuid2uname(uid_t uid)
  51{
  52        /* Note: used in nofork applets (whoami), be careful not to leak anything */
  53        struct passwd *pw = xgetpwuid(uid);
  54        return pw->pw_name;
  55}
  56
  57char* FAST_FUNC xgid2group(gid_t gid)
  58{
  59        struct group *gr = xgetgrgid(gid);
  60        return gr->gr_name;
  61}
  62
  63char* FAST_FUNC uid2uname(uid_t uid)
  64{
  65        struct passwd *pw = getpwuid(uid);
  66        return (pw) ? pw->pw_name : NULL;
  67}
  68
  69char* FAST_FUNC gid2group(gid_t gid)
  70{
  71        struct group *gr = getgrgid(gid);
  72        return (gr) ? gr->gr_name : NULL;
  73}
  74
  75char* FAST_FUNC uid2uname_utoa(uid_t uid)
  76{
  77        char *name = uid2uname(uid);
  78        return (name) ? name : utoa(uid);
  79}
  80
  81char* FAST_FUNC gid2group_utoa(gid_t gid)
  82{
  83        char *name = gid2group(gid);
  84        return (name) ? name : utoa(gid);
  85}
  86
  87long FAST_FUNC xuname2uid(const char *name)
  88{
  89        struct passwd *myuser;
  90
  91        myuser = xgetpwnam(name);
  92        return myuser->pw_uid;
  93}
  94
  95long FAST_FUNC xgroup2gid(const char *name)
  96{
  97        struct group *mygroup;
  98
  99        mygroup = xgetgrnam(name);
 100        return mygroup->gr_gid;
 101}
 102
 103unsigned long FAST_FUNC get_ug_id(const char *s,
 104                long FAST_FUNC (*xname2id)(const char *))
 105{
 106        unsigned long r;
 107
 108        r = bb_strtoul(s, NULL, 10);
 109        if (errno)
 110                return xname2id(s);
 111        return r;
 112}
 113