1 /******************************************************************************/
2 /* */
3 /* Copyright (c) 2009 FUJITSU LIMITED */
4 /* */
5 /* This program is free software; you can redistribute it and/or modify */
6 /* it under the terms of the GNU General Public License as published by */
7 /* the Free Software Foundation; either version 2 of the License, or */
8 /* (at your option) any later version. */
9 /* */
10 /* This program is distributed in the hope that it will be useful, */
11 /* but WITHOUT ANY WARRANTY; without even the implied warranty of */
12 /* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See */
13 /* the GNU General Public License for more details. */
14 /* */
15 /* You should have received a copy of the GNU General Public License */
16 /* along with this program; if not, write to the Free Software */
17 /* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA */
18 /* */
19 /* Author: Miao Xie <miaox@cn.fujitsu.com> */
20 /* Restructure for LTP: Shi Weihua <shiwh@cn.fujitsu.com> */
21 /* */
22 /******************************************************************************/
23 /*++ simple_echo.c
24 *
25 * DESCRIPTION:
26 * The command "echo" can't return the errno. So we write this program to
27 * instead of "echo".
28 *
29 * Author:
30 * -------
31 * 2008/04/17 created by Miao Xie@FNST
32 *
33 */
34
35 #include <sys/types.h>
36 #include <sys/stat.h>
37 #include <err.h>
38 #include <errno.h>
39 #include <fcntl.h>
40 #include <libgen.h>
41 #include <stdio.h>
42 #include <stdlib.h>
43 #include <string.h>
44 #include <unistd.h>
45
main(int argc,char ** argv)46 int main(int argc, char **argv)
47 {
48 int fd = 1;
49
50 if (argc != 2 && argc != 3) {
51 fprintf(stderr, "usage: %s STRING [ostream]\n",
52 basename(argv[0]));
53 exit(1);
54 }
55
56 if (argc == 3)
57 if ((fd = open(argv[2], O_RDWR | O_SYNC)) == -1)
58 err(errno, "%s", argv[2]);
59
60 if (write(fd, argv[1], strlen(argv[1])) == -1)
61 err(errno, "write error");
62
63 if (fd != 1)
64 if (close(fd) == -1)
65 err(errno, "close error");
66 return 0;
67 }
68