/* vi: set sw=4 ts=4: */ /* * deluser/delgroup implementation for busybox * * Copyright (C) 1999 by Lineo, inc. and John Beppu * Copyright (C) 1999,2000,2001 by John Beppu <beppu@codepoet.org> * Copyright (C) 2007 by Tito Ragusa <farmatito@tiscali.it> * * Licensed under GPLv2, see file LICENSE in this source tree. * */ #include "libbb.h" int deluser_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE; int deluser_main(int argc, char **argv) { /* User or group name */ char *name; /* Username (non-NULL only in "delgroup USER GROUP" case) */ char *member; /* Name of passwd or group file */ const char *pfile; /* Name of shadow or gshadow file */ const char *sfile; /* Are we deluser or delgroup? */ int do_deluser = (ENABLE_DELUSER && (!ENABLE_DELGROUP || applet_name[3] == 'u')); if (geteuid() != 0) bb_error_msg_and_die(bb_msg_perm_denied_are_you_root); name = argv[1]; member = NULL; switch (argc) { case 3: if (!ENABLE_FEATURE_DEL_USER_FROM_GROUP || do_deluser) break; /* It's "delgroup USER GROUP" */ member = name; name = argv[2]; /* Fallthrough */ case 2: if (do_deluser) { /* "deluser USER" */ xgetpwnam(name); /* bail out if USER is wrong */ pfile = bb_path_passwd_file; if (ENABLE_FEATURE_SHADOWPASSWDS) sfile = bb_path_shadow_file; } else { struct group *gr; do_delgroup: /* "delgroup GROUP" or "delgroup USER GROUP" */ if (do_deluser < 0) { /* delgroup after deluser? */ gr = getgrnam(name); if (!gr) return EXIT_SUCCESS; } else { gr = xgetgrnam(name); /* bail out if GROUP is wrong */ } if (!member) { /* "delgroup GROUP" */ struct passwd *pw; struct passwd pwent; /* Check if the group is in use */ #define passwd_buf bb_common_bufsiz1 while (!getpwent_r(&pwent, passwd_buf, sizeof(passwd_buf), &pw)) { if (pwent.pw_gid == gr->gr_gid) bb_error_msg_and_die("'%s' still has '%s' as their primary group!", pwent.pw_name, name); } //endpwent(); } pfile = bb_path_group_file; if (ENABLE_FEATURE_SHADOWPASSWDS) sfile = bb_path_gshadow_file; } /* Modify pfile, then sfile */ do { if (update_passwd(pfile, name, NULL, member) == -1) return EXIT_FAILURE; if (ENABLE_FEATURE_SHADOWPASSWDS) { pfile = sfile; sfile = NULL; } } while (ENABLE_FEATURE_SHADOWPASSWDS && pfile); if (ENABLE_DELGROUP && do_deluser > 0) { /* "deluser USER" also should try to delete * same-named group. IOW: do "delgroup USER" */ // On debian deluser is a perl script that calls userdel. // From man userdel: // If USERGROUPS_ENAB is defined to yes in /etc/login.defs, userdel will // delete the group with the same name as the user. do_deluser = -1; goto do_delgroup; } return EXIT_SUCCESS; } /* Reached only if number of command line args is wrong */ bb_show_usage(); }