INITGROUPS(3) BSD Library Functions Manual INITGROUPS(3)NAME
initgroups -- initialize group access list
LIBRARY
Standard C Library (libc, -lc)
SYNOPSIS
#include <unistd.h>
int
initgroups(const char *name, int basegid);
DESCRIPTION
The initgroups() function uses the getgrouplist(3) function to calculate the group access list for the user specified in name. This group
list is then setup for the current process using setgroups(2). The basegid is automatically included in the groups list. Typically this
value is given as the group number from the password file.
RETURN VALUES
The initgroups() function returns -1 if it was not invoked by the super-user.
SEE ALSO setgroups(2), getgrouplist(3)HISTORY
The initgroups() function appeared in 4.2BSD.
BUGS
The getgrouplist() function called by initgroups() uses the routines based on getgrent(3). If the invoking program uses any of these rou-
tines, the group structure will be overwritten in the call to initgroups().
BSD June 4, 1993 BSD
Check Out this Related Man Page
GETGROUPLIST(3) BSD Library Functions Manual GETGROUPLIST(3)NAME
getgrouplist -- calculate group access list
LIBRARY
Standard C Library (libc, -lc)
SYNOPSIS
#include <unistd.h>
int
getgrouplist(const char *name, int basegid, int *groups, int *ngroups);
DESCRIPTION
The getgrouplist() 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 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 setgroups(2), initgroups(3)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().
BSD June 9, 1993 BSD
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