| /* Copyright (C) 1991-2018 Free Software Foundation, Inc. |
| This file is part of the GNU C Library. |
| |
| The GNU C Library is free software; you can redistribute it and/or |
| modify it under the terms of the GNU Lesser General Public |
| License as published by the Free Software Foundation; either |
| version 2.1 of the License, or (at your option) any later version. |
| |
| The GNU C Library is distributed in the hope that it will be useful, |
| but WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| Lesser General Public License for more details. |
| |
| You should have received a copy of the GNU Lesser General Public |
| License along with the GNU C Library; if not, see |
| <http://www.gnu.org/licenses/>. */ |
| |
| #include <errno.h> |
| #include <nss.h> |
| #include <stdio.h> |
| #include <string.h> |
| #include <grp.h> |
| |
| #define flockfile(s) _IO_flockfile (s) |
| #define funlockfile(s) _IO_funlockfile (s) |
| |
| #define _S(x) x ? x : "" |
| |
| /* Write an entry to the given stream. |
| This must know the format of the group file. */ |
| int |
| putgrent (const struct group *gr, FILE *stream) |
| { |
| int retval; |
| |
| if (__glibc_unlikely (gr == NULL) || __glibc_unlikely (stream == NULL) |
| || gr->gr_name == NULL || !__nss_valid_field (gr->gr_name) |
| || !__nss_valid_field (gr->gr_passwd) |
| || !__nss_valid_list_field (gr->gr_mem)) |
| { |
| __set_errno (EINVAL); |
| return -1; |
| } |
| |
| flockfile (stream); |
| |
| if (gr->gr_name[0] == '+' || gr->gr_name[0] == '-') |
| retval = fprintf (stream, "%s:%s::", |
| gr->gr_name, _S (gr->gr_passwd)); |
| else |
| retval = fprintf (stream, "%s:%s:%lu:", |
| gr->gr_name, _S (gr->gr_passwd), |
| (unsigned long int) gr->gr_gid); |
| if (__builtin_expect (retval, 0) < 0) |
| { |
| funlockfile (stream); |
| return -1; |
| } |
| |
| if (gr->gr_mem != NULL) |
| { |
| for (size_t i = 0; gr->gr_mem[i] != NULL; i++) |
| if (fprintf (stream, i == 0 ? "%s" : ",%s", gr->gr_mem[i]) < 0) |
| { |
| /* What else can we do? */ |
| funlockfile (stream); |
| return -1; |
| } |
| } |
| |
| retval = fputc_unlocked ('\n', stream); |
| |
| funlockfile (stream); |
| |
| return retval < 0 ? -1 : 0; |
| } |