putgrent(3) — Linux manual page

putgrent(3)              Library Functions Manual             putgrent(3)

NAME         top

       putgrent - write a group database entry to a file

LIBRARY         top

       Standard C library (libc, -lc)

SYNOPSIS         top

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

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

DESCRIPTION         top

       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         top

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

ATTRIBUTES         top

       For an explanation of the terms used in this section, see
       attributes(7).
       ┌──────────────────────────────────────┬───────────────┬─────────┐
       │ Interface                            │ Attribute     │ Value   │
       ├──────────────────────────────────────┼───────────────┼─────────┤
       │ putgrent()                           │ Thread safety │ MT-Safe │
       └──────────────────────────────────────┴───────────────┴─────────┘

STANDARDS         top

       GNU.

SEE ALSO         top

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

COLOPHON         top

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Linux man-pages 6.15            2025-05-17                    putgrent(3)

Pages that refer to this page: fgetgrent(3),  getgrent(3),  getgrent_r(3)

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