+++ /dev/null
-.\" Copyright 1993 David Metcalfe (david@prism.demon.co.uk)
-.\"
-.\" %%%LICENSE_START(VERBATIM)
-.\" Permission is granted to make and distribute verbatim copies of this
-.\" manual provided the copyright notice and this permission notice are
-.\" preserved on all copies.
-.\"
-.\" Permission is granted to copy and distribute modified versions of this
-.\" manual under the conditions for verbatim copying, provided that the
-.\" entire resulting derived work is distributed under the terms of a
-.\" permission notice identical to this one.
-.\"
-.\" Since the Linux kernel and libraries are constantly changing, this
-.\" manual page may be incorrect or out-of-date. The author(s) assume no
-.\" responsibility for errors or omissions, or for damages resulting from
-.\" the use of the information contained herein. The author(s) may not
-.\" have taken the same level of care in the production of this manual,
-.\" which is licensed free of charge, as they might when working
-.\" professionally.
-.\"
-.\" Formatted or processed versions of this manual, if unaccompanied by
-.\" the source, must acknowledge the copyright and authors of this work.
-.\" %%%LICENSE_END
-.\"
-.\" References consulted:
-.\" Linux libc source code
-.\" Lewine's _POSIX Programmer's Guide_ (O'Reilly & Associates, 1991)
-.\" 386BSD man pages
-.\" Modified Sat Jul 24 19:29:54 1993 by Rik Faith (faith@cs.unc.edu)
-.TH GETGRENT 3 2014-10-02 "" "Linux Programmer's Manual"
-.SH NAME
-getgrent, setgrent, endgrent \- get group file entry
-.SH SYNOPSIS
-.nf
-.B #include <sys/types.h>
-.B #include <grp.h>
-.sp
-.B struct group *getgrent(void);
-.sp
-.B void setgrent(void);
-.sp
-.B void endgrent(void);
-.fi
-.sp
-.in -4n
-Feature Test Macro Requirements for glibc (see
-.BR feature_test_macros (7)):
-.in
-.sp
-.PD 0
-.ad l
-.BR setgrent ():
-.RS 4
-_SVID_SOURCE || _BSD_SOURCE || _XOPEN_SOURCE\ >=\ 500 ||
-_XOPEN_SOURCE\ &&\ _XOPEN_SOURCE_EXTENDED ||
-.br
-/* Since glibc 2.12: */ _POSIX_C_SOURCE\ >=\ 200809L
-.RE
-.sp
-.BR getgrent (),
-.BR endgrent ():
-.RS 4
-_SVID_SOURCE || _BSD_SOURCE || _XOPEN_SOURCE\ >=\ 500 ||
-_XOPEN_SOURCE\ &&\ _XOPEN_SOURCE_EXTENDED
-.RE
-.PD
-.ad b
-.SH DESCRIPTION
-The
-.BR getgrent ()
-function returns a pointer to a structure containing
-the broken-out fields of a record in the group database
-(e.g., the local group file
-.IR /etc/group ,
-NIS, and LDAP).
-The first time
-.BR getgrent ()
-is called,
-it returns the first entry; thereafter, it returns successive entries.
-.PP
-The
-.BR setgrent ()
-function rewinds to the beginning
-of the group database, to allow repeated scans.
-.PP
-The
-.BR endgrent ()
-function is used to close the group database
-after all processing has been performed.
-.PP
-The \fIgroup\fP structure is defined in \fI<grp.h>\fP as follows:
-.sp
-.in +4n
-.nf
-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 */
-};
-.fi
-.in
-.PP
-For more information about the fields of this structure, see
-.BR group (5).
-.SH RETURN VALUE
-The
-.BR getgrent ()
-function returns a pointer to a
-.I group
-structure,
-or NULL if there are no more entries or an error occurs.
-.LP
-Upon error,
-.I errno
-may be set.
-If one wants to check
-.I errno
-after the call, it should be set to zero before the call.
-
-The return value may point to a static area, and may be overwritten
-by subsequent calls to
-.BR getgrent (),
-.BR getgrgid (3),
-or
-.BR getgrnam (3).
-(Do not pass the returned pointer to
-.BR free (3).)
-.SH ERRORS
-.TP
-.B EAGAIN
-The service was temporarily unavailable; try again later.
-For NSS backends in glibc this indicates a temporary error talking to the backend.
-The error may correct itself, retrying later is suggested.
-.TP
-.B EINTR
-A signal was caught.
-.TP
-.B EIO
-I/O error.
-.TP
-.B EMFILE
-The calling process already has too many open files.
-.TP
-.B ENFILE
-Too many open files in the system.
-.TP
-.\" not in POSIX
-.B ENOENT
-A necessary input file cannot be found.
-For NSS backends in glibc this indicates the backend is not correctly configured.
-.TP
-.B ENOMEM
-.\" not in POSIX
-Insufficient memory to allocate
-.I group
-structure.
-.TP
-.B ERANGE
-Insufficient buffer space supplied.
-.SH FILES
-.TP
-.I /etc/group
-local group database file
-.SH ATTRIBUTES
-.SS Multithreading (see pthreads(7))
-The
-.BR getgrent ()
-function is not thread-safe.
-.LP
-The
-.BR setgrent ()
-and
-.BR endgrent ()
-functions are thread-safe.
-.SH CONFORMING TO
-SVr4, 4.3BSD, POSIX.1-2001.
-.SH SEE ALSO
-.BR fgetgrent (3),
-.BR getgrent_r (3),
-.BR getgrgid (3),
-.BR getgrnam (3),
-.BR getgrouplist (3),
-.BR putgrent (3),
-.BR group (5)
-.SH COLOPHON
-This page is part of release 3.79 of the Linux
-.I man-pages
-project.
-A description of the project,
-information about reporting bugs,
-and the latest version of this page,
-can be found at
-\%http://www.kernel.org/doc/man\-pages/.
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