mes/lib/tests/stdio/90-fread-fwrite.c
Jan Nieuwenhuizen 3ed82d7010
mescc: Mes C Library: Cleanup includes.
* include/mes/lib-mini.h: Move from include/libmes-mini.h.  Update users.
* include/mes/lib.h: Move from include/libmes.h.  Update users.
2019-05-08 00:25:41 +02:00

78 lines
1.9 KiB
C

/* -*-comment-start: "//";comment-end:""-*-
* GNU Mes --- Maxwell Equations of Software
* Copyright © 2018 Jan (janneke) Nieuwenhuizen <janneke@gnu.org>
*
* This file is part of GNU Mes.
*
* GNU Mes is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 3 of the License, or (at
* your option) any later version.
*
* GNU Mes 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with GNU Mes. If not, see <http://www.gnu.org/licenses/>.
*/
#include <mes/lib.h>
#include <fcntl.h>
#include <unistd.h>
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
int
main ()
{
char *temp = "COPYING.tmp";
char *new = "COPYING.new";
unlink (temp);
unlink (new);
FILE *t = fopen (temp, "wb+");
FILE *n = fopen (new, "wb");
char *header = "!<header>\n";
fwrite (header, strlen (header), 1, n);
char *data = "foo bar baz\n";
fwrite (data, strlen (data), 1, t);
fseek (t, 0, SEEK_END);
int size = ftell (t);
fprintf (stderr, " size=>%d\n", size);
fseek (t, 0, SEEK_SET);
char *p = (char*)malloc (size + 1);
fread (p, size, 1, t);
fwrite (p, size, 1, n);
char header_plus_data[200];
strcpy (header_plus_data, header);
strcat (header_plus_data, data);
FILE *test = fopen (new, "r");
char buf[200];
fflush (n);
fread (buf, strlen (header_plus_data), 1, test);
eputs ("buf="); eputs (buf); eputs ("\n");
if (strcmp (buf, header_plus_data))
return 1;
if (access (temp, R_OK))
return 22;
unlink (temp);
if (!access (temp, R_OK))
return 3;
unlink (new);
return 0;
}