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
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
|
<TITLE>getgroups</TITLE>
<body bgcolor="#ffffcc">
<hr>
<pre>
<h3>GETGROUPS(2) Linux Programmer's Manual GETGROUPS(2)
</h3>
<h3>NAME
</h3> getgroups, setgroups - get/set group access list
<h3>SYNOPSIS
</h3> #include <unistd.h>
int getgroups(int size, gid_t list[]);
#define __USE_BSD
#include <grp.h>
int setgroups(size_t size, const gid_t *list);
<h3>DESCRIPTION
</h3> getgroups
Up to size supplemental groups are returned in
list. If size is zero, list is not modified, but
the total number of supplemental groups for the
process is returned.
setgroups
Sets the supplemental groups for the process. Only
the super-user may use this function.
<h3>RETURN VALUE
</h3> getgroups
On success, the number of groups stored in list is
returned (if size is zero, however, the number of
supplemental group IDs associated with the process
is returned). On error, -1 is returned, and errno
is set appropriately.
setgroups
On success, zero is returned. On error, -1 is
returned, and errno is set appropriately.
<h3>ERRORS
</h3> EFAULT list has an invalid address.
EPERM For setgroups, the user is not the super-user.
EINVAL For setgroups, gidsetsize is greater than NGROUPS
(32 for Linux 0.99.11).
<h3>CONFORMING TO
</h3> getgroups conforms to POSIX.1 (and is present in BSD 4.3).
Since setgroups requires privilege, it is not covered
under POSIX.1.
<h3>BUGS
</h3> The __USE_BSD flag probably shouldn't be required for set-
groups.
<h3>Linux 0.99.11 23 July 1993 1
</h3>
<h3>GETGROUPS(2) Linux Programmer's Manual GETGROUPS(2)
</h3>
</pre>
<hr>
<h3>SEE ALSO
</h3><p>
<a href=initgroups.htm>initgroups</a>,
<pre>
<h3>Linux 0.99.11 23 July 1993 2
</h3>
</pre>
<P>
<hr>
<p>
<center>
<table border=2 width=80%>
<tr align=center>
<td width=25%>
<a href=../cref.html>Top</a>
</td><td width=25%>
<a href=../master_index.html>Master Index</a>
</td><td width=25%>
<a href=../SYNTAX/keywords.html>Keywords</a>
</td><td width=25%>
<a href=../FUNCTIONS/funcref.htm>Functions</a>
</td>
</tr>
</table>
</center>
<p>
<hr>
This manual page was brought to you by <i>mjl_man V-2.0</i>
|
