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/* 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.
*/
//config:config DELUSER
//config: bool "deluser"
//config: default y
//config: help
//config: Utility for deleting a user account.
//config:
//config:config DELGROUP
//config: bool "delgroup"
//config: default y
//config: help
//config: Utility for deleting a group account.
//config:
//config:config FEATURE_DEL_USER_FROM_GROUP
//config: bool "Support removing users from groups"
//config: default y
//config: depends on DELGROUP
//config: help
//config: If called with two non-option arguments, deluser
//config: or delgroup will remove an user from a specified group.
//applet:IF_DELUSER(APPLET(deluser, BB_DIR_USR_SBIN, BB_SUID_DROP))
//applet:IF_DELGROUP(APPLET_ODDNAME(delgroup, deluser, BB_DIR_USR_SBIN, BB_SUID_DROP, delgroup))
//kbuild:lib-$(CONFIG_DELUSER) += deluser.o
//kbuild:lib-$(CONFIG_DELGROUP) += deluser.o
//usage:#define deluser_trivial_usage
//usage: IF_LONG_OPTS("[--remove-home] ") "USER"
//usage:#define deluser_full_usage "\n\n"
//usage: "Delete USER from the system"
// --remove-home is self-explanatory enough to put it in --help
//usage:#define delgroup_trivial_usage
//usage: IF_FEATURE_DEL_USER_FROM_GROUP("[USER] ")"GROUP"
//usage:#define delgroup_full_usage "\n\n"
//usage: "Delete group GROUP from the system"
//usage: IF_FEATURE_DEL_USER_FROM_GROUP(" or user USER from group GROUP")
#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 !ENABLE_LONG_OPTS
const int opt_delhome = 0;
#else
int opt_delhome = 0;
if (do_deluser) {
applet_long_options =
"remove-home\0" No_argument "\xff";
opt_delhome = getopt32(argv, "");
argv += opt_delhome;
argc -= opt_delhome;
}
#endif
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" */
struct passwd *pw;
pw = xgetpwnam(name); /* bail out if USER is wrong */
pfile = bb_path_passwd_file;
if (ENABLE_FEATURE_SHADOWPASSWDS)
sfile = bb_path_shadow_file;
if (opt_delhome)
remove_file(pw->pw_dir, FILEUTILS_RECUR);
} 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;
/* Check if the group is in use */
while ((pw = getpwent()) != NULL) {
if (pw->pw_gid == gr->gr_gid)
bb_error_msg_and_die("'%s' still has '%s' as their primary group!",
pw->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 (do_deluser > 0) {
/* Delete user from all groups */
if (update_passwd(bb_path_group_file, NULL, NULL, name) == -1)
return EXIT_FAILURE;
if (ENABLE_DELGROUP) {
/* "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();
}
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