Diff of /trunk/mkinitrd-magellan/busybox/loginutils/deluser.c

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	revision 815 by niro, Sat Sep 1 22:45:15 2007 UTC	revision 816 by niro, Fri Apr 24 18:33:46 2009 UTC
#	Line 1	Line 1
1	/* vi: set sw=4 ts=4: */	/* vi: set sw=4 ts=4: */
2	/*	/*
3	* deluser (remove lusers from the system ;) for TinyLogin	* deluser/delgroup implementation for busybox
4	*	*
5	* Copyright (C) 1999 by Lineo, inc. and John Beppu	* Copyright (C) 1999 by Lineo, inc. and John Beppu
6	* Copyright (C) 1999,2000,2001 by John Beppu <beppu@codepoet.org>	* Copyright (C) 1999,2000,2001 by John Beppu <beppu@codepoet.org>
7	* Unified with delgroup by Tito Ragusa <farmatito@tiscali.it>	* Copyright (C) 2007 by Tito Ragusa <farmatito@tiscali.it>
8	*	*
9	* Licensed under GPL version 2, see file LICENSE in this tarball for details.	* Licensed under GPL version 2, see file LICENSE in this tarball for details.
10	*	*
11	*/	*/
12
13	#include "busybox.h"	#include "libbb.h"
14
15	static void del_line_matching(const char *login, const char *filename)	/* Status */
16		#define STATUS_OK            0
17		#define NAME_NOT_FOUND       1
18		#define MEMBER_NOT_FOUND     2
19
20		static void del_line_matching(char **args,
21		const char *filename,
22		FILE* FAST_FUNC (*fopen_func)(const char *fileName, const char *mode))
23	{	{
	char *line;
24	FILE *passwd;	FILE *passwd;
25	int len = strlen(login);	smallint error = NAME_NOT_FOUND;
26	int found = 0;	char *name = (ENABLE_FEATURE_DEL_USER_FROM_GROUP && args[2]) ? args[2] : args[1];
27	llist_t *plist = NULL;	char *line, *del;
28		char *new = xzalloc(1);
29	passwd = fopen_or_warn(filename, "r");
30	if (!passwd) return;	passwd = fopen_func(filename, "r");
31		if (passwd) {
32	while ((line = xmalloc_fgets(passwd))) {	while ((line = xmalloc_fgets(passwd))) {
33	if (!strncmp(line, login, len)	int len = strlen(name);
34	&& line[len] == ':'
35	) {	if (strncmp(line, name, len) == 0
36	found++;	&& line[len] == ':'
37		) {
38		error = STATUS_OK;
39		if (ENABLE_FEATURE_DEL_USER_FROM_GROUP) {
40		struct group *gr;
41		char *p;
42		if (args[2]
43		/* There were two args on commandline */
44		&& (gr = getgrnam(name))
45		/* The group was not deleted in the meanwhile */
46		&& (p = strrchr(line, ':'))
47		/* We can find a pointer to the last ':' */
48		) {
49		error = MEMBER_NOT_FOUND;
50		/* Move past ':' (worst case to '\0') and cut the line */
51		p[1] = '\0';
52		/* Reuse p */
53		for (p = xzalloc(1); *gr->gr_mem != NULL; gr->gr_mem++) {
54		/* Add all the other group members */
55		if (strcmp(args[1], *gr->gr_mem) != 0) {
56		del = p;
57		p = xasprintf("%s%s%s", p, p[0] ? "," : "", *gr->gr_mem);
58		free(del);
59		} else
60		error = STATUS_OK;
61		}
62		/* Recompose the line */
63		line = xasprintf("%s%s\n", line, p);
64		if (ENABLE_FEATURE_CLEAN_UP) free(p);
65		} else
66		goto skip;
67		}
68		}
69		del = new;
70		new = xasprintf("%s%s", new, line);
71		free(del);
72		skip:
73	free(line);	free(line);
	} else {
	llist_add_to_end(&plist, line);
74	}	}
	}
75
76	if (!ENABLE_FEATURE_CLEAN_UP) {	if (ENABLE_FEATURE_CLEAN_UP) fclose(passwd);
77	if (!found) {
78	bb_error_msg("can't find '%s' in '%s'", login, filename);	if (error) {
79	return;	if (ENABLE_FEATURE_DEL_USER_FROM_GROUP && error == MEMBER_NOT_FOUND) {
80	}	/* Set the correct values for error message */
81	passwd = fopen_or_warn(filename, "w");	filename = name;
82	if (passwd)	name = args[1];
83	while ((line = llist_pop(&plist)))	}
84	fputs(line, passwd);	bb_error_msg("can't find %s in %s", name, filename);
85	} else {	} else {
86	if (!found) {	passwd = fopen_func(filename, "w");
87	bb_error_msg("can't find '%s' in '%s'", login, filename);	if (passwd) {
88	goto clean_up;	fputs(new, passwd);
89	}	if (ENABLE_FEATURE_CLEAN_UP) fclose(passwd);
	fclose(passwd);
	passwd = fopen_or_warn(filename, "w");
	if (passwd) {
	clean_up:
	while ((line = llist_pop(&plist))) {
	if (found) fputs(line, passwd);
	free(line);
90	}	}
	fclose(passwd);
91	}	}
92	}	}
93		free(new);
94	}	}
95
96		int deluser_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
97	int deluser_main(int argc, char **argv)	int deluser_main(int argc, char **argv)
98	{	{
99	if (argc != 2)	if (argc == 2
100	bb_show_usage();	|| (ENABLE_FEATURE_DEL_USER_FROM_GROUP
101		&& (applet_name[3] == 'g' && argc == 3))
	if (ENABLE_DELUSER
	&& (!ENABLE_DELGROUP || applet_name[3] == 'u')
102	) {	) {
103	del_line_matching(argv[1], bb_path_passwd_file);	if (geteuid())
104	if (ENABLE_FEATURE_SHADOWPASSWDS)	bb_error_msg_and_die(bb_msg_perm_denied_are_you_root);
	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);
105
106	return EXIT_SUCCESS;	if ((ENABLE_FEATURE_DEL_USER_FROM_GROUP && argc != 3)
107		|| ENABLE_DELUSER
108		|| (ENABLE_DELGROUP && ENABLE_DESKTOP)
109		) {
110		if (ENABLE_DELUSER
111		&& (!ENABLE_DELGROUP || applet_name[3] == 'u')
112		) {
113		del_line_matching(argv, bb_path_passwd_file, xfopen);
114		if (ENABLE_FEATURE_SHADOWPASSWDS)
115		del_line_matching(argv, bb_path_shadow_file, fopen_or_warn);
116		} else if (ENABLE_DESKTOP && ENABLE_DELGROUP && getpwnam(argv[1]))
117		bb_error_msg_and_die("can't remove primary group of user %s", argv[1]);
118		}
119		del_line_matching(argv, bb_path_group_file, xfopen);
120		if (ENABLE_FEATURE_SHADOWPASSWDS)
121		del_line_matching(argv, bb_path_gshadow_file, fopen_or_warn);
122		return EXIT_SUCCESS;
123		} else
124		bb_show_usage();
125	}	}
	/* $Id: deluser.c,v 1.1 2007-09-01 22:43:52 niro Exp $ */

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