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-rw-r--r--include/usage.h5
-rw-r--r--loginutils/Config.in8
-rw-r--r--loginutils/deluser.c148
-rw-r--r--scripts/defconfig1
4 files changed, 107 insertions, 55 deletions
diff --git a/include/usage.h b/include/usage.h
index 2fb8112b0..afcc4b3d7 100644
--- a/include/usage.h
+++ b/include/usage.h
@@ -571,9 +571,10 @@
"Deallocate unused virtual terminal /dev/ttyN"
#define delgroup_trivial_usage \
- "GROUP"
+ USE_FEATURE_DEL_USER_FROM_GROUP("[USER] ")"GROUP"
#define delgroup_full_usage \
- "Delete group GROUP from the system"
+ "Delete group GROUP from the system" \
+ USE_FEATURE_DEL_USER_FROM_GROUP(" or user USER from group GROUP")
#define deluser_trivial_usage \
"USER"
diff --git a/loginutils/Config.in b/loginutils/Config.in
index 1d52cdfe5..e8ab9ec3c 100644
--- a/loginutils/Config.in
+++ b/loginutils/Config.in
@@ -74,6 +74,14 @@ config DELGROUP
help
Utility for deleting a group account.
+config FEATURE_DEL_USER_FROM_GROUP
+ bool "Support for removing users from groups."
+ default n
+ depends on DELGROUP
+ help
+ If called with two non-option arguments, deluser
+ or delgroup will remove an user from a specified group.
+
config ADDUSER
bool "adduser"
default n
diff --git a/loginutils/deluser.c b/loginutils/deluser.c
index e9bde00bd..2781df319 100644
--- a/loginutils/deluser.c
+++ b/loginutils/deluser.c
@@ -1,10 +1,10 @@
/* vi: set sw=4 ts=4: */
/*
- * deluser (remove lusers from the system ;) for TinyLogin
+ * 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>
- * Unified with delgroup by Tito Ragusa <farmatito@tiscali.it>
+ * Copyright (C) 2007 by Tito Ragusa <farmatito@tiscali.it>
*
* Licensed under GPL version 2, see file LICENSE in this tarball for details.
*
@@ -12,72 +12,114 @@
#include "busybox.h"
-static void del_line_matching(const char *login, const char *filename)
+/* Status */
+#define STATUS_OK 0
+#define NAME_NOT_FOUND 1
+#define MEMBER_NOT_FOUND 2
+
+static void del_line_matching(char **args,
+ const char *filename,
+ FILE *(*fopen_func)(const char *fileName, const char *mode))
{
- char *line;
FILE *passwd;
- int len = strlen(login);
- int found = 0;
- llist_t *plist = NULL;
+ smallint error = NAME_NOT_FOUND;
+ char *name = (ENABLE_FEATURE_DEL_USER_FROM_GROUP && args[2]) ? args[2] : args[1];
+ char *line, *del;
+ char *new = xzalloc(1);
- passwd = fopen_or_warn(filename, "r");
- if (!passwd) return;
+ passwd = fopen_func(filename, "r");
+ if (passwd) {
+ while ((line = xmalloc_fgets(passwd))) {
+ int len = strlen(name);
- while ((line = xmalloc_fgets(passwd))) {
- if (!strncmp(line, login, len)
- && line[len] == ':'
- ) {
- found++;
+ if (strncmp(line, name, len) == 0
+ && line[len] == ':'
+ ) {
+ error = STATUS_OK;
+ if (ENABLE_FEATURE_DEL_USER_FROM_GROUP) {
+ struct group *gr;
+ char *p;
+ if (args[2]
+ /* There were two args on commandline */
+ && (gr = getgrnam(name))
+ /* The group was not deleted in the meanwhile */
+ && (p = strrchr(line, ':'))
+ /* We can find a pointer to the last ':' */
+ ) {
+ error = MEMBER_NOT_FOUND;
+ /* Move past ':' (worst case to '\0') and cut the line */
+ p[1] = '\0';
+ /* Reuse p */
+ for (p = xzalloc(1); *gr->gr_mem != NULL; gr->gr_mem++) {
+ /* Add all the other group members */
+ if (strcmp(args[1], *gr->gr_mem) != 0) {
+ del = p;
+ p = xasprintf("%s%s%s", p, p[0] ? "," : "", *gr->gr_mem);
+ free(del);
+ } else
+ error = STATUS_OK;
+ }
+ /* Recompose the line */
+ line = xasprintf("%s%s\n", line, p);
+ if (ENABLE_FEATURE_CLEAN_UP) free(p);
+ } else
+ goto skip;
+ }
+ }
+ del = new;
+ new = xasprintf("%s%s", new, line);
+ free(del);
+ skip:
free(line);
- } else {
- llist_add_to_end(&plist, line);
}
- }
- if (!ENABLE_FEATURE_CLEAN_UP) {
- if (!found) {
- bb_error_msg("can't find '%s' in '%s'", login, filename);
- return;
- }
- passwd = fopen_or_warn(filename, "w");
- if (passwd)
- while ((line = llist_pop(&plist)))
- fputs(line, passwd);
- } else {
- if (!found) {
- bb_error_msg("can't find '%s' in '%s'", login, filename);
- goto clean_up;
- }
- fclose(passwd);
- passwd = fopen_or_warn(filename, "w");
- if (passwd) {
- clean_up:
- while ((line = llist_pop(&plist))) {
- if (found) fputs(line, passwd);
- free(line);
+ if (ENABLE_FEATURE_CLEAN_UP) fclose(passwd);
+
+ if (error) {
+ if (ENABLE_FEATURE_DEL_USER_FROM_GROUP && error == MEMBER_NOT_FOUND) {
+ /* Set the correct values for error message */
+ filename = name;
+ name = args[1];
+ }
+ bb_error_msg("can't find %s in %s", name, filename);
+ } else {
+ passwd = fopen_func(filename, "w");
+ if (passwd) {
+ fputs(new, passwd);
+ if (ENABLE_FEATURE_CLEAN_UP) fclose(passwd);
}
- fclose(passwd);
}
}
+ free(new);
}
int deluser_main(int argc, char **argv);
int deluser_main(int argc, char **argv)
{
- if (argc != 2)
- bb_show_usage();
-
- if (ENABLE_DELUSER
- && (!ENABLE_DELGROUP || applet_name[3] == 'u')
+ if (argc == 2
+ || (ENABLE_FEATURE_DEL_USER_FROM_GROUP
+ && (applet_name[3] == 'g' && argc == 3))
) {
- del_line_matching(argv[1], bb_path_passwd_file);
+ if (geteuid())
+ bb_error_msg_and_die(bb_msg_perm_denied_are_you_root);
+
+ if ((ENABLE_FEATURE_DEL_USER_FROM_GROUP && argc != 3)
+ || ENABLE_DELUSER
+ || (ENABLE_DELGROUP && ENABLE_DESKTOP)
+ ) {
+ if (ENABLE_DELUSER
+ && (!ENABLE_DELGROUP || applet_name[3] == 'u')
+ ) {
+ del_line_matching(argv, bb_path_passwd_file, xfopen);
+ if (ENABLE_FEATURE_SHADOWPASSWDS)
+ del_line_matching(argv, bb_path_shadow_file, fopen_or_warn);
+ } else if (ENABLE_DESKTOP && ENABLE_DELGROUP && getpwnam(argv[1]))
+ bb_error_msg_and_die("can't remove primary group of user %s", argv[1]);
+ }
+ del_line_matching(argv, bb_path_group_file, xfopen);
if (ENABLE_FEATURE_SHADOWPASSWDS)
- del_line_matching(argv[1], bb_path_shadow_file);
- }
- del_line_matching(argv[1], bb_path_group_file);
- if (ENABLE_FEATURE_SHADOWPASSWDS)
- del_line_matching(argv[1], bb_path_gshadow_file);
-
- return EXIT_SUCCESS;
+ del_line_matching(argv, bb_path_gshadow_file, fopen_or_warn);
+ return EXIT_SUCCESS;
+ } else
+ bb_show_usage();
}
-
diff --git a/scripts/defconfig b/scripts/defconfig
index 009026e5a..c9086eb13 100644
--- a/scripts/defconfig
+++ b/scripts/defconfig
@@ -349,6 +349,7 @@ CONFIG_USE_BB_PWD_GRP=y
CONFIG_ADDGROUP=y
CONFIG_FEATURE_ADDUSER_TO_GROUP=y
CONFIG_DELGROUP=y
+CONFIG_FEATURE_DEL_USER_FROM_GROUP=y
CONFIG_ADDUSER=y
CONFIG_DELUSER=y
CONFIG_GETTY=y
generated by cgit v1.2.3 (git 2.39.1) at 2024-06-30 12:09:00 +0000