INITGROUPS(3) Library Functions Manual INITGROUPS(3)NAME
initgroups - initialize group access list
SYNOPSIS
initgroups(name, basegid)
char *name;
int basegid;
DESCRIPTION
Initgroups reads through the group file and sets up, using the setgroups(2) call, 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.
FILES
/etc/group
SEE ALSO setgroups(2)DIAGNOSTICS
Initgroups returns -1 if it was not invoked by the super-user.
BUGS
Initgroups uses the routines based on getgrent(3). If the invoking program uses any of these routines, the group structure will be over-
written in the call to initgroups.
4.2 Berkeley Distribution May 12, 1986 INITGROUPS(3)
Check Out this Related Man Page
initgroups(3C)initgroups(3C)NAME
initgroups() - initialize group access list
SYNOPSIS DESCRIPTION
reads the login group file, and sets up the group access list for the user specified by name, using the system call (see setgroups(2)). If
the value of basegid is zero or positive, it is automatically included in the groups list. Typically this value is given as the group num-
ber from the password file. If the login group file is empty, basegid is the only member of the list. If the number of groups, including
the basegid entry, exceeds {NGROUPS_MAX}, then subsequent group entries are ignored (see limits(5)).
RETURN VALUE
Upon successful completion, returns 0; otherwise it returns -1 and sets to indicate the error.
ERRORS
fails if any of the following conditions are encountered:
The calling process does not have the appropriate privilege.
Insufficient memory available to hold gidset.
An entry in gidset is not a valid group ID.
WARNINGS
uses the routines based on getgrent(3C). If the invoking program uses any of these routines, the group structure is overwritten by the
call to Subsequent calls to with the same name parameter override the actions of previous calls.
On many systems, no one seems to keep up to date.
uses the Dynamic Name Service Switch. (See nsswitch.conf(4).) An application that uses this interface cannot be fully archive bound.
NETWORKING FEATURES
NFS
If is linked to tries to use the Network Information Service (NIS) for entries beginning with a plus sign If group membership for name is
managed by NIS, and no NIS server is able to respond, a call to does not return until a server does respond. This lack of action causes
commands such as and to wait indefinitely.
See group(4) for proper syntax and operation.
AUTHOR
was developed by the University of California, Berkeley.
FILES
login group file
SEE ALSO login(1), su(1), getgroups(2), setgroups(2), group(4), thread_safety(5).
initgroups(3C)
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