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28 .\" @(#)setgroups.2 8.2 (Berkeley) 4/16/94
36 .Nd set group access list
43 .Fn setgroups "int ngroups" "const gid_t *gidset"
48 sets the group access list of the current user process
49 according to the array
54 indicates the number of entries in the array and must be no
58 Only the super-user may set a new group list.
60 The first entry of the group array
62 is used as the effective group-ID for the process.
63 This entry is over-written when a setgid program is run.
64 To avoid losing access to the privileges of the
66 entry, it should be duplicated later in the group array.
68 this happens because the group value indicated
69 in the password file also appears in
71 The group value in the password file is placed in
73 and that value then gets added a second time when the
75 file is scanned to create the group set.
81 system call will fail if:
84 The caller is not the super-user.
86 The number specified in the
88 argument is larger than the
92 The address specified for
94 is outside the process
103 system call appeared in