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 11 #include "libbb.h" 12 13 /* TODO: maybe change API to return malloced data? 14 * This will allow to stop using libc functions returning 15 * pointers to static data (getpwuid) 16 */ 17 xgetpwnam(const char * name)18struct passwd* FAST_FUNC xgetpwnam(const char *name) 19 { 20 struct passwd *pw = getpwnam(name); 21 if (!pw) 22 bb_error_msg_and_die("unknown user %s", name); 23 return pw; 24 } 25 xgetgrnam(const char * name)26struct group* FAST_FUNC xgetgrnam(const char *name) 27 { 28 struct group *gr = getgrnam(name); 29 if (!gr) 30 bb_error_msg_and_die("unknown group %s", name); 31 return gr; 32 } 33 34 xgetpwuid(uid_t uid)35struct passwd* FAST_FUNC xgetpwuid(uid_t uid) 36 { 37 struct passwd *pw = getpwuid(uid); 38 if (!pw) 39 bb_error_msg_and_die("unknown uid %u", (unsigned)uid); 40 return pw; 41 } 42 xgetgrgid(gid_t gid)43struct group* FAST_FUNC xgetgrgid(gid_t gid) 44 { 45 struct group *gr = getgrgid(gid); 46 if (!gr) 47 bb_error_msg_and_die("unknown gid %u", (unsigned)gid); 48 return gr; 49 } 50 xuid2uname(uid_t uid)51char* FAST_FUNC xuid2uname(uid_t uid) 52 { 53 struct passwd *pw = xgetpwuid(uid); 54 return pw->pw_name; 55 } 56 xgid2group(gid_t gid)57char* FAST_FUNC xgid2group(gid_t gid) 58 { 59 struct group *gr = xgetgrgid(gid); 60 return gr->gr_name; 61 } 62 uid2uname(uid_t uid)63char* FAST_FUNC uid2uname(uid_t uid) 64 { 65 struct passwd *pw = getpwuid(uid); 66 return (pw) ? pw->pw_name : NULL; 67 } 68 gid2group(gid_t gid)69char* FAST_FUNC gid2group(gid_t gid) 70 { 71 struct group *gr = getgrgid(gid); 72 return (gr) ? gr->gr_name : NULL; 73 } 74 uid2uname_utoa(uid_t uid)75char* FAST_FUNC uid2uname_utoa(uid_t uid) 76 { 77 char *name = uid2uname(uid); 78 return (name) ? name : utoa(uid); 79 } 80 gid2group_utoa(gid_t gid)81char* FAST_FUNC gid2group_utoa(gid_t gid) 82 { 83 char *name = gid2group(gid); 84 return (name) ? name : utoa(gid); 85 } 86 xuname2uid(const char * name)87long FAST_FUNC xuname2uid(const char *name) 88 { 89 struct passwd *myuser; 90 91 myuser = xgetpwnam(name); 92 return myuser->pw_uid; 93 } 94 xgroup2gid(const char * name)95long FAST_FUNC xgroup2gid(const char *name) 96 { 97 struct group *mygroup; 98 99 mygroup = xgetgrnam(name); 100 return mygroup->gr_gid; 101 } 102 get_ug_id(const char * s,long FAST_FUNC (* xname2id)(const char *))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