busybox/loginutils/deluser.c
Denys Vlasenko f560422fa0 Big cleanup in config help and description
Redundant help texts (one which only repeats the description)
are deleted.

Descriptions and help texts are trimmed.

Some config options are moved, even across menus.

No config option _names_ are changed.

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-01-10 14:58:54 +01:00

163 lines
4.5 KiB
C

/* 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();
}