GETGROUPS
Section: System Calls (2)
Updated: April 10, 1987
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NAME
getgroups - get group access list
SYNOPSIS
#include <sys/param.h>
ngroups = getgroups(gidsetlen, gidset)
int ngroups, gidsetlen, *gidset;
DESCRIPTION
Getgroups
gets the current group access list of the user process
and stores it in the array
gidset.
The parameter
gidsetlen
indicates the number of entries that may be placed in
gidset.
Getgroups
returns the actual number of groups returned in
gidset.
No more than NGROUPS, as defined in
<sys/param.h>,
will ever
be returned.
RETURN VALUE
A successful call returns the number of groups in the group set.
A value of -1 indicates that an error occurred, and the error
code is stored in the global variable errno.
ERRORS
The possible errors for getgroup are:
- [EINVAL]
-
The argument
gidsetlen
is smaller than the number of groups in the group set.
- [EFAULT]
-
The argument gidset specifies
an invalid address.
SEE ALSO
setgroups(2), initgroups(3)
BUGS
The
gidset
array should be of type
gid_t,
but remains integer for compatibility with earlier systems.
Index
- NAME
-
- SYNOPSIS
-
- DESCRIPTION
-
- RETURN VALUE
-
- ERRORS
-
- SEE ALSO
-
- BUGS
-
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