NAME | SYNOPSIS | DESCRIPTION | RETURN VALUE | ERRORS | ATTRIBUTES | CONFORMING TO | SEE ALSO | COLOPHON

FGETGRENT(3)              Linux Programmer's Manual             FGETGRENT(3)

NAME         top

       fgetgrent - get group file entry

SYNOPSIS         top

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

       struct group *fgetgrent(FILE *stream);

   Feature Test Macro Requirements for glibc (see feature_test_macros(7)):

       fgetgrent():
           Since glibc 2.19:
               _DEFAULT_SOURCE
           Glibc 2.19 and earlier:
               _SVID_SOURCE

DESCRIPTION         top

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

RETURN VALUE         top

       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 cause.

ERRORS         top

       ENOMEM Insufficient memory to allocate group structure.

ATTRIBUTES         top

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

       ┌────────────┬───────────────┬──────────────────────────┐
       │Interface   Attribute     Value                    │
       ├────────────┼───────────────┼──────────────────────────┤
       │fgetgrent() │ Thread safety │ MT-Unsafe race:fgetgrent │
       └────────────┴───────────────┴──────────────────────────┘

CONFORMING TO         top

       SVr4.

SEE ALSO         top

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

COLOPHON         top

       This page is part of release 4.08 of the Linux man-pages project.  A
       description of the project, information about reporting bugs, and the
       latest version of this page, can be found at
       https://www.kernel.org/doc/man-pages/.

GNU                              2016-03-15                     FGETGRENT(3)