man3/putpwent.3

   1 .\" Copyright 1993 David Metcalfe (david@prism.demon.co.uk)
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  25 .\" References consulted:
  26 .\"     Linux libc source code
  27 .\"     Lewine's _POSIX Programmer's Guide_ (O'Reilly & Associates, 1991)
  28 .\"     386BSD man pages
  29 .\" Modified Sat Jul 24 18:43:46 1993 by Rik Faith (faith@cs.unc.edu)
  30 .TH PUTPWENT 3  2017-09-15 "GNU" "Linux Programmer's Manual"
  31 .SH NAME
  32 putpwent \- write a password file entry
  33 .SH SYNOPSIS
  34 .nf
  35 .B #include <stdio.h>
  36 .B #include <sys/types.h>
  37 .B #include <pwd.h>
  38 .PP
  39 .BI "int putpwent(const struct passwd *" p ", FILE *" stream );
  40 .fi
  41 .PP
  42 .in -4n
  43 Feature Test Macro Requirements for glibc (see
  44 .BR feature_test_macros (7)):
  45 .in
  46 .PP
  47 .BR putpwent ():
  48     Since glibc 2.19:
  49         _DEFAULT_SOURCE
  50     Glibc 2.19 and earlier:
  51         _SVID_SOURCE
  52 .SH DESCRIPTION
  53 The
  54 .BR putpwent ()
  55 function writes a password entry from the
  56 structure \fIp\fP in the file associated with \fIstream\fP.
  57 .PP
  58 The \fIpasswd\fP structure is defined in \fI<pwd.h>\fP as follows:
  59 .PP
  60 .in +4n
  61 .EX
  62 struct passwd {
  63     char    *pw_name;        /* username */
  64     char    *pw_passwd;      /* user password */
  65     uid_t    pw_uid;         /* user ID */
  66     gid_t    pw_gid;         /* group ID */
  67     char    *pw_gecos;       /* real name */
  68     char    *pw_dir;         /* home directory */
  69     char    *pw_shell;       /* shell program */
  70 };
  71 .EE
  72 .in
  73 .SH RETURN VALUE
  74 The
  75 .BR putpwent ()
  76 function returns 0 on success, or \-1 if an error
  77 occurs.
  78 In the event of an error,
  79 .I errno
  80 is set to indicate the cause.
  81 .SH ERRORS
  82 .TP
  83 .B EINVAL
  84 Invalid (NULL) argument given.
  85 .SH ATTRIBUTES
  86 For an explanation of the terms used in this section, see
  87 .BR attributes (7).
  88 .TS
  89 allbox;
  90 lb lb lb
  91 l l l.
  92 Interface       Attribute       Value
  93 T{
  94 .BR putpwent ()
  95 T}      Thread safety   MT-Safe locale
  96 .TE
  97 .sp 1
  98 .SH CONFORMING TO
  99 SVr4.
 100 .SH SEE ALSO
 101 .BR endpwent (3),
 102 .BR fgetpwent (3),
 103 .BR getpw (3),
 104 .BR getpwent (3),
 105 .BR getpwnam (3),
 106 .BR getpwuid (3),
 107 .BR setpwent (3)