fgetgrent(3)

NAME#

fgetgrent - get group file entry

LIBRARY#

Standard C library (libc, -lc)

SYNOPSIS#

#include <stdio.h>\n
\n#include <sys/types.h>\n
\n#include <grp.h>

struct group *fgetgrent(FILE *\nstream\n);

fgetgrent():

\n
    Since glibc 2.19:
\n
        _DEFAULT_SOURCE
\n
    glibc 2.19 and earlier:
\n
        _SVID_SOURCE

DESCRIPTION#

The fgetgrent() function returns a pointer to a structure containing the group information from the file referred to by stream. The first time it is called it returns the first entry; thereafter, it returns successive entries. The file referred to by stream must have the same format as /etc/group (see group(5)).

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

struct group {
\n
    char   *gr_name;        /* group name */
\n
    char   *gr_passwd;      /* group password */
\n
    gid_t   gr_gid;         /* group ID */
\n
    char  **gr_mem;         /* NULL-terminated array of pointers
\n
                               to names of group members */
};

RETURN VALUE#

The fgetgrent() function returns a pointer to a group structure, or NULL if there are no more entries or an error occurs. In the event of an error, errno is set to indicate the error.

ERRORS#

ENOMEM

Insufficient memory to allocate group structure.

ATTRIBUTES#

For an explanation of the terms used in this section, see attributes(7).

STANDARDS#

None.

HISTORY#

SVr4.

SEE ALSO#

endgrent(3), fgetgrent_r(3), fopen(3), getgrent(3), getgrgid(3), getgrnam(3), putgrent(3), setgrent(3), group(5)