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glibc/pwd/putpwent.c
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/* Copyright (C) 1991-2016 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 <stdio.h> | |
#include <pwd.h> | |
#include <nss.h> | |
#define _S(x) x ?: "" | |
/* Write an entry to the given stream. This must know the format of | |
the password file. If the input contains invalid characters, | |
return EINVAL, or replace them with spaces (if they are contained | |
in the GECOS field). */ | |
int | |
putpwent (const struct passwd *p, FILE *stream) | |
{ | |
if (p == NULL || stream == NULL | |
|| p->pw_name == NULL || !__nss_valid_field (p->pw_name) | |
|| !__nss_valid_field (p->pw_passwd) | |
|| !__nss_valid_field (p->pw_dir) | |
|| !__nss_valid_field (p->pw_shell)) | |
{ | |
__set_errno (EINVAL); | |
return -1; | |
} | |
int ret; | |
char *gecos_alloc; | |
const char *gecos = __nss_rewrite_field (p->pw_gecos, &gecos_alloc); | |
if (gecos == NULL) | |
return -1; | |
if (p->pw_name[0] == '+' || p->pw_name[0] == '-') | |
ret = fprintf (stream, "%s:%s:::%s:%s:%s\n", | |
p->pw_name, _S (p->pw_passwd), | |
gecos, _S (p->pw_dir), _S (p->pw_shell)); | |
else | |
ret = fprintf (stream, "%s:%s:%lu:%lu:%s:%s:%s\n", | |
p->pw_name, _S (p->pw_passwd), | |
(unsigned long int) p->pw_uid, | |
(unsigned long int) p->pw_gid, | |
gecos, _S (p->pw_dir), _S (p->pw_shell)); | |
free (gecos_alloc); | |
if (ret >= 0) | |
ret = 0; | |
return ret; | |
} |