NAME
getgrouplist —
calculate group access list
LIBRARY
library “libc”
SYNOPSIS
#include
<unistd.h>
int
getgrouplist(const
char *name, gid_t
basegid, gid_t
*groups, int
*ngroups);
DESCRIPTION
Thegetgrouplist()
function reads through the group file and calculates the group access list for
the user specified in name. The
basegid is automatically included in the groups list.
Typically this value is given as the group number from the password file.
The resulting group list is returned in the integer array pointed to by groups. The caller specifies the size of the groups array in the integer pointed to by ngroups; the actual number of groups found is returned in ngroups.
RETURN VALUES
The getgrouplist() function returns -1 if
the size of the group list is too small to hold all the user's groups. Here,
the group array will be filled with as many groups as will fit.
FILES
- /etc/group
- group membership list
SEE ALSO
HISTORY
The getgrouplist() function first appeared
in 4.4BSD.
BUGS
The getgrouplist() function uses the
routines based on
getgrent(3). If the invoking program uses any of these
routines, the group structure will be overwritten in the call to
getgrouplist().