GETGRNAM

getgrnam, getgrgid ? get group file entry

#include <grp.h>
#include <sys/types.h>

struct group *getgrnam(const char *name);

struct group *getgrgid(gid_t gid);

The getgrnam() function returns a pointer to a structure containing the group information from /etc/group for the entry that matches the group name name.

The getgrgid() function returns a pointer to a structure containing the group information from /etc/group for the entry that matches the group gid gid.

The group structure is defined in <grp.h> as follows:

struct group {
        char    *gr_name;        /* group name */
        char    *gr_passwd;      /* group password */
        gid_t   gr_gid;          /* group id */
        char    **gr_mem;        /* group members */
};

The getgrnam() and getgrgid() functions return the group information structure, or NULL if the matching entry is not found or an error occurs.

ENOMEM

Insufficient memory to allocate group information structure.

/etc/group

Group database file

SVID 3, POSIX, BSD 4.3

fgetgrent(3), getgrent(3), setgrent(3), endgrent(3)