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/* Test for processing of invalid passwd entries. [BZ #18724]
Copyright (C) 2015-2023 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
<https://www.gnu.org/licenses/>. */
#include <errno.h>
#include <pwd.h>
#include <stdbool.h>
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
static bool errors;
static void
check (struct passwd p, const char *expected)
{
char *buf;
size_t buf_size;
FILE *f = open_memstream (&buf, &buf_size);
if (f == NULL)
{
printf ("open_memstream: %m\n");
errors = true;
return;
}
int ret = putpwent (&p, f);
if (expected == NULL)
{
if (ret == -1)
{
if (errno != EINVAL)
{
printf ("putpwent: unexpected error code: %m\n");
errors = true;
}
}
else
{
printf ("putpwent: unexpected success (\"%s\")\n", p.pw_name);
errors = true;
}
}
else
{
/* Expect success. */
size_t expected_length = strlen (expected);
if (ret == 0)
{
long written = ftell (f);
if (written <= 0 || fflush (f) < 0)
{
printf ("stream error: %m\n");
errors = true;
}
else if (buf[written - 1] != '\n')
{
printf ("FAILED: \"%s\" without newline\n", expected);
errors = true;
}
else if (strncmp (buf, expected, written - 1) != 0
|| written - 1 != expected_length)
{
printf ("FAILED: \"%s\" (%ld), expected \"%s\" (%zu)\n",
buf, written - 1, expected, expected_length);
errors = true;
}
}
else
{
printf ("FAILED: putpwent (expected \"%s\"): %m\n", expected);
errors = true;
}
}
fclose (f);
free (buf);
}
static int
do_test (void)
{
check ((struct passwd) {
.pw_name = (char *) "root",
},
"root::0:0:::");
check ((struct passwd) {
.pw_name = (char *) "root",
.pw_passwd = (char *) "password",
},
"root:password:0:0:::");
check ((struct passwd) {
.pw_name = (char *) "root",
.pw_passwd = (char *) "password",
.pw_uid = 12,
.pw_gid = 34,
.pw_gecos = (char *) "gecos",
.pw_dir = (char *) "home",
.pw_shell = (char *) "shell",
},
"root:password:12:34:gecos:home:shell");
check ((struct passwd) {
.pw_name = (char *) "root",
.pw_passwd = (char *) "password",
.pw_uid = 12,
.pw_gid = 34,
.pw_gecos = (char *) ":ge\n:cos\n",
.pw_dir = (char *) "home",
.pw_shell = (char *) "shell",
},
"root:password:12:34: ge cos :home:shell");
/* Bad values. */
{
static const char *const bad_strings[] = {
":",
"\n",
":bad",
"\nbad",
"b:ad",
"b\nad",
"bad:",
"bad\n",
"b:a\nd",
NULL
};
for (const char *const *bad = bad_strings; *bad != NULL; ++bad)
{
check ((struct passwd) {
.pw_name = (char *) *bad,
}, NULL);
check ((struct passwd) {
.pw_name = (char *) "root",
.pw_passwd = (char *) *bad,
}, NULL);
check ((struct passwd) {
.pw_name = (char *) "root",
.pw_dir = (char *) *bad,
}, NULL);
check ((struct passwd) {
.pw_name = (char *) "root",
.pw_shell = (char *) *bad,
}, NULL);
}
}
return errors > 0;
}
#define TEST_FUNCTION do_test ()
#include "../test-skeleton.c"
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