| /* vi: set sw=4 ts=4: */ |
| /* |
| * adduser - add users to /etc/passwd and /etc/shadow |
| * |
| * Copyright (C) 1999 by Lineo, inc. and John Beppu |
| * Copyright (C) 1999,2000,2001 by John Beppu <beppu@codepoet.org> |
| * |
| * Licensed under the GPL v2 or later, see the file LICENSE in this tarball. |
| */ |
| |
| #include "libbb.h" |
| |
| #define OPT_DONT_SET_PASS (1 << 4) |
| #define OPT_SYSTEM_ACCOUNT (1 << 5) |
| #define OPT_DONT_MAKE_HOME (1 << 6) |
| |
| |
| /* remix */ |
| /* recoded such that the uid may be passed in *p */ |
| static void passwd_study(struct passwd *p) |
| { |
| int max; |
| |
| if (getpwnam(p->pw_name)) |
| bb_error_msg_and_die("login '%s' is in use", p->pw_name); |
| |
| if (option_mask32 & OPT_SYSTEM_ACCOUNT) { |
| p->pw_uid = 0; |
| max = 999; |
| } else { |
| p->pw_uid = 1000; |
| max = 64999; |
| } |
| |
| /* check for a free uid (and maybe gid) */ |
| while (getpwuid(p->pw_uid) || (!p->pw_gid && getgrgid(p->pw_uid))) |
| p->pw_uid++; |
| |
| if (!p->pw_gid) { |
| /* new gid = uid */ |
| p->pw_gid = p->pw_uid; |
| if (getgrnam(p->pw_name)) |
| bb_error_msg_and_die("group name '%s' is in use", p->pw_name); |
| } |
| |
| if (p->pw_uid > max) |
| bb_error_msg_and_die("no free uids left"); |
| } |
| |
| static void addgroup_wrapper(struct passwd *p) |
| { |
| char *cmd; |
| |
| cmd = xasprintf("addgroup -g %u '%s'", (unsigned)p->pw_gid, p->pw_name); |
| system(cmd); |
| free(cmd); |
| } |
| |
| static void passwd_wrapper(const char *login) ATTRIBUTE_NORETURN; |
| |
| static void passwd_wrapper(const char *login) |
| { |
| static const char prog[] ALIGN1 = "passwd"; |
| |
| BB_EXECLP(prog, prog, login, NULL); |
| bb_error_msg_and_die("cannot execute %s, you must set password manually", prog); |
| } |
| |
| #if ENABLE_FEATURE_ADDUSER_LONG_OPTIONS |
| static const char adduser_longopts[] ALIGN1 = |
| "home\0" Required_argument "h" |
| "gecos\0" Required_argument "g" |
| "shell\0" Required_argument "s" |
| "ingroup\0" Required_argument "G" |
| "disabled-password\0" No_argument "D" |
| "empty-password\0" No_argument "D" |
| "system\0" No_argument "S" |
| "no-create-home\0" No_argument "H" |
| ; |
| #endif |
| |
| /* |
| * adduser will take a login_name as its first parameter. |
| * home, shell, gecos: |
| * can be customized via command-line parameters. |
| */ |
| int adduser_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE; |
| int adduser_main(int argc ATTRIBUTE_UNUSED, char **argv) |
| { |
| struct passwd pw; |
| const char *usegroup = NULL; |
| FILE *file; |
| |
| #if ENABLE_FEATURE_ADDUSER_LONG_OPTIONS |
| applet_long_options = adduser_longopts; |
| #endif |
| |
| /* got root? */ |
| if (geteuid()) { |
| bb_error_msg_and_die(bb_msg_perm_denied_are_you_root); |
| } |
| |
| pw.pw_gecos = (char *)"Linux User,,,"; |
| pw.pw_shell = (char *)DEFAULT_SHELL; |
| pw.pw_dir = NULL; |
| |
| /* exactly one non-option arg */ |
| opt_complementary = "=1"; |
| getopt32(argv, "h:g:s:G:DSH", &pw.pw_dir, &pw.pw_gecos, &pw.pw_shell, &usegroup); |
| argv += optind; |
| |
| /* fill in the passwd struct */ |
| pw.pw_name = argv[0]; |
| die_if_bad_username(pw.pw_name); |
| if (!pw.pw_dir) { |
| /* create string for $HOME if not specified already */ |
| pw.pw_dir = xasprintf("/home/%s", argv[0]); |
| } |
| pw.pw_passwd = (char *)"x"; |
| pw.pw_gid = usegroup ? xgroup2gid(usegroup) : 0; /* exits on failure */ |
| |
| /* make sure everything is kosher and setup uid && maybe gid */ |
| passwd_study(&pw); |
| |
| /* add to passwd */ |
| file = xfopen(bb_path_passwd_file, "a"); |
| //fseek(file, 0, SEEK_END); /* paranoia, "a" should ensure that anyway */ |
| if (putpwent(&pw, file) != 0) { |
| bb_perror_nomsg_and_die(); |
| } |
| /* do fclose even if !ENABLE_FEATURE_CLEAN_UP. |
| * We will exec passwd, files must be flushed & closed before that! */ |
| fclose(file); |
| |
| #if ENABLE_FEATURE_SHADOWPASSWDS |
| /* add to shadow if necessary */ |
| file = fopen_or_warn(bb_path_shadow_file, "a"); |
| if (file) { |
| //fseek(file, 0, SEEK_END); |
| fprintf(file, "%s:!:%u:0:99999:7:::\n", |
| pw.pw_name, /* username */ |
| (unsigned)(time(NULL) / 86400) /* sp->sp_lstchg */ |
| /*0,*/ /* sp->sp_min */ |
| /*99999,*/ /* sp->sp_max */ |
| /*7*/ /* sp->sp_warn */ |
| ); |
| fclose(file); |
| } |
| #endif |
| |
| /* add to group */ |
| /* addgroup should be responsible for dealing w/ gshadow */ |
| /* if using a pre-existing group, don't create one */ |
| if (!usegroup) |
| addgroup_wrapper(&pw); |
| |
| /* Clear the umask for this process so it doesn't |
| * screw up the permissions on the mkdir and chown. */ |
| umask(0); |
| if (!(option_mask32 & OPT_DONT_MAKE_HOME)) { |
| /* Set the owner and group so it is owned by the new user, |
| then fix up the permissions to 2755. Can't do it before |
| since chown will clear the setgid bit */ |
| if (mkdir(pw.pw_dir, 0755) |
| || chown(pw.pw_dir, pw.pw_uid, pw.pw_gid) |
| || chmod(pw.pw_dir, 02755) /* set setgid bit on homedir */ |
| ) { |
| bb_simple_perror_msg(pw.pw_dir); |
| } |
| } |
| |
| if (!(option_mask32 & OPT_DONT_SET_PASS)) { |
| /* interactively set passwd */ |
| passwd_wrapper(pw.pw_name); |
| } |
| |
| return 0; |
| } |