setgroups(2)setgroups(2)NAMEsetgroups - Set the group access list
SYNOPSIS
#include <unistd.h> #include <sys/types.h>
int setgroups(
int gidsetsize,
gid_t grouplist[] );
PARAMETERS
Indicates the number of entries in the array pointed to by the grou‐
plist parameter. This number must not be more than NGROUPS_MAX, which
is defined in the <sys/syslimits.h> header file. Points to the array
that contains the group access list of the current user process. Ele‐
ment grouplist[0] becomes the new effective group ID.
DESCRIPTION
The setgroups() function sets the group access list of the current user
process according to the array pointed to by the grouplist parameter.
This function fails unless the invoking process has superuser privi‐
lege.
RETURN VALUES
Upon successful completion, a value of 0 (zero) is returned. If the
setgroups() function fails, a value of -1 is returned and errno is set
to indicate the error.
ERRORS
If the setgroups() function fails, errno may be set to one of the fol‐
lowing values: The caller does not have the appropriate system privi‐
lege. The value of the gidsetsize parameter is greater than
NGROUPS_MAX or an entry in the grouplist parameter is not a valid group
ID. The grouplist parameter points outside of the allocated address
space of the process.
SEE ALSO
Functions: getgroups(2), initgroups(3)setgroups(2)
