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grpscan.3
Manvendra Bhangui edited this page Feb 25, 2024
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grpscan - return array of groups to which the user belongs
#include <setuserid.h>
gid_t *grpscan(char *user, int *ngroups);
grpscan reads group(5) database for primary and supplementary groups to which user belongs and returns an gid_t array of ngroups. The return value and ngroups can be further used in a call to setgroups(2).
grpscan returns NULL on failure or gid_t array on success.
setgroups(2) getgrent(3) setuserid(3), setuser_privileges(3),