1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
|
/* 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 GPL version 2, see file LICENSE in this tarball for details.
*
*/
#include "libbb.h"
/* 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))
{
FILE *passwd;
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_func(filename, "r");
if (passwd) {
while ((line = xmalloc_fgets(passwd))) {
int len = strlen(name);
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);
}
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);
}
}
}
free(new);
}
int deluser_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
int deluser_main(int argc, char **argv)
{
if (argc == 2
|| (ENABLE_FEATURE_DEL_USER_FROM_GROUP
&& (applet_name[3] == 'g' && argc == 3))
) {
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, bb_path_gshadow_file, fopen_or_warn);
return EXIT_SUCCESS;
} else
bb_show_usage();
}
|
