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29.14.1 The Data Structure for a Group

The functions and data structures for accessing the system group database are declared in the header file grp.h.

— Data Type: struct group

The group structure is used to hold information about an entry in the system group database. It has at least the following members:

char *gr_name
The name of the group.
gid_t gr_gid
The group ID of the group.
char **gr_mem
A vector of pointers to the names of users in the group. Each user name is a null-terminated string, and the vector itself is terminated by a null pointer.