GETGRENT

NAME
SYNOPSIS
DESCRIPTION
RETURN VALUE
ERRORS
FILES
CONFORMING TO
SEE ALSO

NAME

getgrent, setgrent, endgrent − get group file entry

SYNOPSIS

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

struct group *getgrent(void);

void setgrent(void);

void endgrent(void);

DESCRIPTION

The getgrent() function returns a pointer to a structure containing the group information from /etc/group. The first time it is called it returns the first entry; thereafter, it returns successive entries.

The setgrent() function rewinds the file pointer to the beginning of the /etc/group file.

The endgrent() function closes the /etc/group file.

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 */
};

RETURN VALUE

The getgrent() function returns the group information structure, or NULL if there are no more entries or an error occurs.

ERRORS

ENOMEM

Insufficient memory to allocate group information structure.

FILES

/etc/group

group database file

CONFORMING TO

SVID 3, BSD 4.3

SEE ALSO

fgetgrent(3), getgrnam(3), getgrgid(3)