GETGROUPS(2) | System Calls Manual | GETGROUPS(2) |
getgroups
— get
group access list
#include
<unistd.h>
int
getgroups
(int
gidsetlen, gid_t
*gidset);
getgroups
()
gets the current group access list of the current 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_MAX}
will ever be returned. If
gidsetlen is 0, getgroups
()
returns the number of groups without modifying the
gidset array.
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.
The possible errors for getgroups
()
are:
The getgroups
() function conforms to
IEEE Std 1003.1-2008 (“POSIX.1”).
The getgroups
() system call first appeared
in 4.1cBSD.
September 10, 2015 | OpenBSD-6.1 |