NAME

       putgrent - write a group database entry to a file

SYNOPSIS

       #define _GNU_SOURCE         /* See feature_test_macros(7) */
       #include <grp.h>

       int putgrent(const struct group *restrict grp, FILE *restrict stream);

DESCRIPTION

       The  putgrent()  function  is  the  counterpart for fgetgrent(3).  The function writes the
       content of the provided struct group into the stream.  The list of group members  must  be
       NULL-terminated or NULL-initialized.

       The struct group is defined as follows:

           struct group {
               char   *gr_name;      /* group name */
               char   *gr_passwd;    /* group password */
               gid_t   gr_gid;       /* group ID */
               char  **gr_mem;       /* group members */
           };

RETURN VALUE

       The function returns zero on success, and a nonzero value on error.

ATTRIBUTES

       For an explanation of the terms used in this section, see attributes(7).

       ┌───────────────────────────────────────────────────────────────┬───────────────┬─────────┐
       │Interface                                                      │ Attribute     │ Value   │
       ├───────────────────────────────────────────────────────────────┼───────────────┼─────────┤
       │putgrent()                                                     │ Thread safety │ MT-Safe │
       └───────────────────────────────────────────────────────────────┴───────────────┴─────────┘

CONFORMING TO

       This function is a GNU extension.

SEE ALSO

       fgetgrent(3), getgrent(3), group(5)

COLOPHON

       This  page  is  part of release 5.13 of the Linux 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/.