.\" Copyright 1993 David Metcalfe (david@prism.demon.co.uk)
.\"
.\" %%%LICENSE_START(VERBATIM)
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.\" manual provided the copyright notice and this permission notice are
.\" preserved on all copies.
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.\" manual under the conditions for verbatim copying, provided that the
.\" entire resulting derived work is distributed under the terms of a
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.\" Since the Linux kernel and libraries are constantly changing, this
.\" manual page may be incorrect or out-of-date.  The author(s) assume no
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.\" References consulted:
.\"     Linux libc source code
.\"     Lewine's _POSIX Programmer's Guide_ (O'Reilly & Associates, 1991)
.\"     386BSD man pages
.\" Modified Sat Jul 24 18:43:46 1993 by Rik Faith (faith@cs.unc.edu)
.TH PUTPWENT 3  2016-03-15 "GNU" "Linux Programmer's Manual"
.SH NAME
putpwent \- write a password file entry
.SH SYNOPSIS
.nf
.B #include <stdio.h>
.B #include <sys/types.h>
.B #include <pwd.h>
.sp
.BI "int putpwent(const struct passwd *" p ", FILE *" stream );
.fi
.sp
.in -4n
Feature Test Macro Requirements for glibc (see
.BR feature_test_macros (7)):
.in
.sp
.BR putpwent ():
    Since glibc 2.19:
        _DEFAULT_SOURCE
    Glibc 2.19 and earlier:
        _SVID_SOURCE
.SH DESCRIPTION
The
.BR putpwent ()
function writes a password entry from the
structure \fIp\fP in the file associated with \fIstream\fP.
.PP
The \fIpasswd\fP structure is defined in \fI<pwd.h>\fP as follows:
.sp
.in +4n
.nf
struct passwd {
    char    *pw_name;        /* username */
    char    *pw_passwd;      /* user password */
    uid_t    pw_uid;         /* user ID */
    gid_t    pw_gid;         /* group ID */
    char    *pw_gecos;       /* real name */
    char    *pw_dir;         /* home directory */
    char    *pw_shell;       /* shell program */
};
.fi
.in
.SH RETURN VALUE
The
.BR putpwent ()
function returns 0 on success, or \-1 if an error
occurs.
In the event of an error,
.I errno
is set to indicate the cause.
.SH ERRORS
.TP
.B EINVAL
Invalid (NULL) argument given.
.SH ATTRIBUTES
For an explanation of the terms used in this section, see
.BR attributes (7).
.TS
allbox;
lb lb lb
l l l.
Interface	Attribute	Value
T{
.BR putpwent ()
T}	Thread safety	MT-Safe locale
.TE

.SH CONFORMING TO
SVr4.
.SH SEE ALSO
.BR endpwent (3),
.BR fgetpwent (3),
.BR getpw (3),
.BR getpwent (3),
.BR getpwnam (3),
.BR getpwuid (3),
.BR setpwent (3)
.SH COLOPHON
This page is part of release 4.10 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
\%https://www.kernel.org/doc/man\-pages/.