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
|
/* groupdel.c - delete a group
*
* Copyright 2013 Ashwini Kumar <ak.ashwini1981@gmail.com>
* Copyright 2013 Kyungwan Han <asura321@gmail.com>
*
* See http://refspecs.linuxfoundation.org/LSB_4.1.0/LSB-Core-generic/LSB-Core-generic/groupdel.html
USE_GROUPDEL(NEWTOY(groupdel, "<1>2", TOYFLAG_NEEDROOT|TOYFLAG_SBIN))
USE_GROUPDEL(OLDTOY(delgroup, groupdel, OPTSTR_groupdel, TOYFLAG_NEEDROOT|TOYFLAG_SBIN))
config GROUPDEL
bool "groupdel"
default n
help
usage: delgroup [USER] GROUP
groupdel GROUP
Delete a group or delete a user from a group
*/
#define FOR_groupdel
#include "toys.h"
void groupdel_main(void)
{
struct group *grp = NULL;
char *entry = NULL;
if (toys.optc == 2) { //del user from group
//toys.optargs[0]- user, toys.optargs[1] - group
if (!getpwnam(toys.optargs[0]))
error_exit("user '%s' does not exist", toys.optargs[0]);
if (!(grp = getgrnam(toys.optargs[1])))
error_exit("group '%s' does not exist", toys.optargs[1]);
if (!(grp = getgrnam(toys.optargs[1])))
error_exit("group '%s' does not exist", toys.optargs[1]);
if (!grp->gr_mem) return;
else {
int i, found = -1;
for (i = 0; grp->gr_mem[i] && (found == -1); i++)
if (!strcmp(grp->gr_mem[i], *toys.optargs)) found = i;
if (found == -1) {
xprintf("%s: The user '%s' is not a member of '%s'\n", toys.which->name,
toys.optargs[0], toys.optargs[1]);
return;
}
entry = xstrdup("");
for (i=0; grp->gr_mem[i]; i++) {
if (found != i) { //leave out user from grp member list
if (i && *entry) strcat(entry, ",");
entry = xrealloc(entry, strlen(entry) + strlen(grp->gr_mem[i]) + 2);
strcat(entry, grp->gr_mem[i]);
}
}
}
} else { //delete the group
struct passwd *pw = NULL;
if (!(grp = getgrnam(*toys.optargs)))
error_exit("group '%s' doesn't exist", *toys.optargs);
//is it a primary grp of user
while ((pw = getpwent())) {
if (pw->pw_gid == grp->gr_gid) {
endpwent();
error_exit("can't remove primary group of user '%s'", pw->pw_name);
}
}
endpwent();
}
update_password("/etc/group", grp->gr_name, entry);
update_password("/etc/gshadow", grp->gr_name, entry);
free(entry);
}
|
