INITGROUPS Section: Linux Programmer's Manual (3) Updated: April 5, 2025 Index   NAME initgroups - initialize the supplementary group access list   SYNOPSIS #include <grp.h> #include <sys/types.h> int initgroups(const char *user, gid_t group);   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.   RETURN VALUE The initgroups() function returns 0 on success, or -1 if an error occurs.   ERRORS EPERM The calling process does not have sufficient privileges. ENOMEM Insufficient memory to allocate group information structure.   FILES /etc/group group database file   CONFORMING TO SVID 3, BSD 4.3   SEE ALSO   Index NAME SYNOPSIS DESCRIPTION RETURN VALUE ERRORS FILES CONFORMING TO SEE ALSO This document was created by using the manual pages. Time: 11:58:04 GMT, March 24, 2025