1 .\" Copyright 1993 David Metcalfe (david@prism.demon.co.uk)
3 .\" %%%LICENSE_START(VERBATIM)
4 .\" Permission is granted to make and distribute verbatim copies of this
5 .\" manual provided the copyright notice and this permission notice are
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8 .\" Permission is granted to copy and distribute modified versions of this
9 .\" manual under the conditions for verbatim copying, provided that the
10 .\" entire resulting derived work is distributed under the terms of a
11 .\" permission notice identical to this one.
13 .\" Since the Linux kernel and libraries are constantly changing, this
14 .\" manual page may be incorrect or out-of-date. The author(s) assume no
15 .\" responsibility for errors or omissions, or for damages resulting from
16 .\" the use of the information contained herein. The author(s) may not
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18 .\" which is licensed free of charge, as they might when working
21 .\" Formatted or processed versions of this manual, if unaccompanied by
22 .\" the source, must acknowledge the copyright and authors of this work.
25 .\" References consulted:
26 .\" Linux libc source code
27 .\" Lewine's _POSIX Programmer's Guide_ (O'Reilly & Associates, 1991)
29 .\" Modified Sat Jul 24 18:43:46 1993 by Rik Faith (faith@cs.unc.edu)
30 .TH PUTPWENT 3 2021-03-22 "GNU" "Linux Programmer's Manual"
32 putpwent \- write a password file entry
36 .B #include <sys/types.h>
39 .BI "int putpwent(const struct passwd *restrict " p \
40 ", FILE *restrict " stream );
44 Feature Test Macro Requirements for glibc (see
45 .BR feature_test_macros (7)):
52 Glibc 2.19 and earlier:
58 function writes a password entry from the
59 structure \fIp\fP in the file associated with \fIstream\fP.
61 The \fIpasswd\fP structure is defined in \fI<pwd.h>\fP as follows:
66 char *pw_name; /* username */
67 char *pw_passwd; /* user password */
68 uid_t pw_uid; /* user ID */
69 gid_t pw_gid; /* group ID */
70 char *pw_gecos; /* real name */
71 char *pw_dir; /* home directory */
72 char *pw_shell; /* shell program */
79 function returns 0 on success.
80 On failure, it returns \-1, and
82 is set to indicate the error.
86 Invalid (NULL) argument given.
88 For an explanation of the terms used in this section, see
96 Interface Attribute Value
99 T} Thread safety MT-Safe locale