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28 .\" @(#)setgroups.2 8.2 (Berkeley) 4/16/94
35 .Nd set group access list
42 .Fn setgroups "int ngroups" "const gid_t *gidset"
47 sets the group access list of the current user process
48 according to the array
53 indicates the number of entries in the array and must be no
57 Only the super-user may set a new group list.
59 The first entry of the group array
61 is used as the effective group-ID for the process.
62 This entry is over-written when a setgid program is run.
63 To avoid losing access to the privileges of the
65 entry, it should be duplicated later in the group array.
67 this happens because the group value indicated
68 in the password file also appears in
70 The group value in the password file is placed in
72 and that value then gets added a second time when the
74 file is scanned to create the group set.
80 system call will fail if:
83 The caller is not the super-user.
85 The number specified in the
87 argument is larger than the
91 The address specified for
93 is outside the process
102 system call appeared in