1 /* vi: set sw=4 ts=4: */
3 * adduser - add users to /etc/passwd and /etc/shadow
5 * Copyright (C) 1999 by Lineo, inc. and John Beppu
6 * Copyright (C) 1999,2000,2001 by John Beppu <beppu@codepoet.org>
8 * Licensed under the GPL v2 or later, see the file LICENSE in this tarball.
13 #define OPT_DONT_SET_PASS (1 << 4)
14 #define OPT_SYSTEM_ACCOUNT (1 << 5)
15 #define OPT_DONT_MAKE_HOME (1 << 6)
19 /* recoded such that the uid may be passed in *p */
20 static void passwd_study(struct passwd *p)
24 if (getpwnam(p->pw_name))
25 bb_error_msg_and_die("login '%s' is in use", p->pw_name);
27 if (option_mask32 & OPT_SYSTEM_ACCOUNT) {
35 /* check for a free uid (and maybe gid) */
36 while (getpwuid(p->pw_uid) || (p->pw_gid == (gid_t)-1 && getgrgid(p->pw_uid))) {
39 bb_error_msg_and_die("no free uids left");
42 if (p->pw_gid == (gid_t)-1) {
43 p->pw_gid = p->pw_uid; /* new gid = uid */
44 if (getgrnam(p->pw_name))
45 bb_error_msg_and_die("group name '%s' is in use", p->pw_name);
49 static void addgroup_wrapper(struct passwd *p)
53 cmd = xasprintf("addgroup -g %u '%s'", (unsigned)p->pw_gid, p->pw_name);
58 static void passwd_wrapper(const char *login) NORETURN;
60 static void passwd_wrapper(const char *login)
62 static const char prog[] ALIGN1 = "passwd";
64 BB_EXECLP(prog, prog, login, NULL);
65 bb_error_msg_and_die("cannot execute %s, you must set password manually", prog);
68 #if ENABLE_FEATURE_ADDUSER_LONG_OPTIONS
69 static const char adduser_longopts[] ALIGN1 =
70 "home\0" Required_argument "h"
71 "gecos\0" Required_argument "g"
72 "shell\0" Required_argument "s"
73 "ingroup\0" Required_argument "G"
74 "disabled-password\0" No_argument "D"
75 "empty-password\0" No_argument "D"
76 "system\0" No_argument "S"
77 "no-create-home\0" No_argument "H"
82 * adduser will take a login_name as its first parameter.
84 * can be customized via command-line parameters.
86 int adduser_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
87 int adduser_main(int argc UNUSED_PARAM, char **argv)
90 const char *usegroup = NULL;
94 #if ENABLE_FEATURE_ADDUSER_LONG_OPTIONS
95 applet_long_options = adduser_longopts;
100 bb_error_msg_and_die(bb_msg_perm_denied_are_you_root);
103 pw.pw_gecos = (char *)"Linux User,,,";
104 pw.pw_shell = (char *)DEFAULT_SHELL;
107 /* exactly one non-option arg */
108 opt_complementary = "=1";
109 getopt32(argv, "h:g:s:G:DSH", &pw.pw_dir, &pw.pw_gecos, &pw.pw_shell, &usegroup);
112 /* fill in the passwd struct */
113 pw.pw_name = argv[0];
114 die_if_bad_username(pw.pw_name);
116 /* create string for $HOME if not specified already */
117 pw.pw_dir = xasprintf("/home/%s", argv[0]);
119 pw.pw_passwd = (char *)"x";
120 pw.pw_gid = usegroup ? xgroup2gid(usegroup) : -1; /* exits on failure */
122 /* make sure everything is kosher and setup uid && maybe gid */
126 file = xfopen(bb_path_passwd_file, "a");
127 //fseek(file, 0, SEEK_END); /* paranoia, "a" should ensure that anyway */
128 if (putpwent(&pw, file) != 0) {
129 bb_perror_nomsg_and_die();
131 /* do fclose even if !ENABLE_FEATURE_CLEAN_UP.
132 * We will exec passwd, files must be flushed & closed before that! */
135 #if ENABLE_FEATURE_SHADOWPASSWDS
136 /* add to shadow if necessary */
137 /* fopen(..., "a"); would create shadow file, which is wrong.
138 * If shadow file doesn't exist, admin probably does not want it */
139 fd = open_or_warn(bb_path_shadow_file, O_WRONLY | O_APPEND);
141 char *s = xasprintf("%s:!:%u:0:99999:7:::\n",
142 pw.pw_name, /* username */
143 (unsigned)(time(NULL) / 86400) /* sp->sp_lstchg */
144 /*0,*/ /* sp->sp_min */
145 /*99999,*/ /* sp->sp_max */
146 /*7*/ /* sp->sp_warn */
148 xwrite(fd, s, strlen(s));
154 /* addgroup should be responsible for dealing w/ gshadow */
155 /* if using a pre-existing group, don't create one */
157 addgroup_wrapper(&pw);
159 /* Clear the umask for this process so it doesn't
160 * screw up the permissions on the mkdir and chown. */
162 if (!(option_mask32 & OPT_DONT_MAKE_HOME)) {
163 /* Set the owner and group so it is owned by the new user,
164 then fix up the permissions to 2755. Can't do it before
165 since chown will clear the setgid bit */
166 if (mkdir(pw.pw_dir, 0755)
167 || chown(pw.pw_dir, pw.pw_uid, pw.pw_gid)
168 || chmod(pw.pw_dir, 02755) /* set setgid bit on homedir */
170 bb_simple_perror_msg(pw.pw_dir);
174 if (!(option_mask32 & OPT_DONT_SET_PASS)) {
175 /* interactively set passwd */
176 passwd_wrapper(pw.pw_name);