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    Command:

    initgroups

    
    
    

    SYNOPSIS

           #include <sys/types.h>
           #include <grp.h>
    
           int initgroups(const char *user, gid_t group);
    
       Feature Test Macro Requirements for glibc (see feature_test_macros(7)):
    
           initgroups(): _BSD_SOURCE
    
    
    

    DESCRIPTION

           The  initgroups() function initializes the group access list by reading
           the group database /etc/group and using all groups of which user  is  a
           member.  The additional group group is also added to the list.
    
           The user argument must be non-NULL.
    
    
    

    RETURN VALUE

           The  initgroups()  function  returns  0  on  success.   On error, -1 is
           returned, and errno is set appropriately.
    
    
    

    ERRORS

           ENOMEM Insufficient memory to allocate group information structure.
    
           EPERM  The calling process has insufficient privilege.  See the  under-
                  lying system call setgroups(2).
    
    
    

    FILES

           /etc/group          group database file
    
    
    

    CONFORMING TO

           SVr4, 4.3BSD.
    
    
    

    SEE ALSO

           getgroups(2), setgroups(2), credentials(7)
    
    
    

    GNU 2007-07-26 INITGROUPS(3)

    
    
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