man3/putgrent.3

   1 .\" Copyright 2003 Walter Harms (walter.harms@informatik.uni-oldenburg.de)
   2 .\"
   3 .\" %%%LICENSE_START(GPL_NOVERSION_ONELINE)
   4 .\" Distributed under GPL
   5 .\" %%%LICENSE_END
   6 .\"
   7 .TH PUTGRENT 3 2017-09-15 "GNU" "Linux Programmer's Manual"
   8 .SH NAME
   9 putgrent \- write a group database entry to a file
  10 .SH SYNOPSIS
  11 .BR "#define _GNU_SOURCE" "         /* See feature_test_macros(7) */"
  12 .br
  13 .B #include <grp.h>
  14 .PP
  15 .BI "int putgrent(const struct group *" grp ", FILE *" stream );
  16 .SH DESCRIPTION
  17 The
  18 .BR putgrent ()
  19 function is the counterpart for
  20 .BR fgetgrent (3).
  21 The function writes the content of the provided
  22 .IR "struct group"
  23 into the
  24 .IR stream .
  25 The list of group members must be NULL-terminated or NULL-initialized.
  26 .PP
  27 The
  28 .IR "struct group"
  29 is defined as follows:
  30 .PP
  31 .in +4n
  32 .EX
  33 struct group {
  34     char   *gr_name;      /* group name */
  35     char   *gr_passwd;    /* group password */
  36     gid_t   gr_gid;       /* group ID */
  37     char  **gr_mem;       /* group members */
  38 };
  39 .EE
  40 .in
  41 .SH RETURN VALUE
  42 The function returns zero on success, and a nonzero value on error.
  43 .SH ATTRIBUTES
  44 For an explanation of the terms used in this section, see
  45 .BR attributes (7).
  46 .TS
  47 allbox;
  48 lb lb lb
  49 l l l.
  50 Interface       Attribute       Value
  51 T{
  52 .BR putgrent ()
  53 T}      Thread safety   MT-Safe
  54 .TE
  55 .sp 1
  56 .SH CONFORMING TO
  57 This function is a GNU extension.
  58 .SH SEE ALSO
  59 .BR fgetgrent (3),
  60 .BR getgrent (3),
  61 .BR group (5)