'\" t .\" Copyright 1993 David Metcalfe (david@prism.demon.co.uk) .\" .\" SPDX-License-Identifier: Linux-man-pages-copyleft .\" .\" 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 2023-02-05 "Linux man-pages 6.03" .SH NAME putpwent \- write a password file entry .SH LIBRARY Standard C library .RI ( libc ", " \-lc ) .SH SYNOPSIS .nf .B #include .B #include .B #include .PP .BI "int putpwent(const struct passwd *restrict " p \ ", FILE *restrict " stream ); .fi .PP .RS -4 Feature Test Macro Requirements for glibc (see .BR feature_test_macros (7)): .RE .PP .BR putpwent (): .nf Since glibc 2.19: _DEFAULT_SOURCE glibc 2.19 and earlier: _SVID_SOURCE .fi .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\fP as follows: .PP .in +4n .EX 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 */ }; .EE .in .SH RETURN VALUE The .BR putpwent () function returns 0 on success. On failure, it returns \-1, and .I errno is set to indicate the error. .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). .ad l .nh .TS allbox; lbx lb lb l l l. Interface Attribute Value T{ .BR putpwent () T} Thread safety MT-Safe locale .TE .hy .ad .sp 1 .SH STANDARDS 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)