iPXE
ntp_cmd.c
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1 /*
2  * Copyright (C) 2016 Michael Brown <mbrown@fensystems.co.uk>.
3  *
4  * This program is free software; you can redistribute it and/or
5  * modify it under the terms of the GNU General Public License as
6  * published by the Free Software Foundation; either version 2 of the
7  * License, or any later version.
8  *
9  * This program is distributed in the hope that it will be useful, but
10  * WITHOUT ANY WARRANTY; without even the implied warranty of
11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12  * General Public License for more details.
13  *
14  * You should have received a copy of the GNU General Public License
15  * along with this program; if not, write to the Free Software
16  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
17  * 02110-1301, USA.
18  *
19  * You can also choose to distribute this program under the terms of
20  * the Unmodified Binary Distribution Licence (as given in the file
21  * COPYING.UBDL), provided that you have satisfied its requirements.
22  */
23 
24 FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
25 
26 #include <stdio.h>
27 #include <string.h>
28 #include <getopt.h>
29 #include <ipxe/command.h>
30 #include <ipxe/parseopt.h>
31 #include <usr/ntpmgmt.h>
32 
33 /** @file
34  *
35  * NTP commands
36  *
37  */
38 
39 /** "ntp" options */
40 struct ntp_options {};
41 
42 /** "ntp" option list */
43 static struct option_descriptor ntp_opts[] = {};
44 
45 /** "ntp" command descriptor */
46 static struct command_descriptor ntp_cmd =
47  COMMAND_DESC ( struct ntp_options, ntp_opts, 1, 1, "<server>" );
48 
49 /**
50  * "ntp" command
51  *
52  * @v argc Argument count
53  * @v argv Argument list
54  * @ret rc Return status code
55  */
56 static int ntp_exec ( int argc, char **argv ) {
57  struct ntp_options opts;
58  const char *hostname;
59  int rc;
60 
61  /* Parse options */
62  if ( ( rc = parse_options ( argc, argv, &ntp_cmd, &opts ) ) != 0 )
63  return rc;
64 
65  /* Parse hostname */
66  hostname = argv[optind];
67 
68  /* Get time and date via NTP */
69  if ( ( rc = ntp ( hostname ) ) != 0 ) {
70  printf ( "Could not get time and date: %s\n", strerror ( rc ) );
71  return rc;
72  }
73 
74  return 0;
75 }
76 
77 /** NTP command */
78 struct command ntp_command __command = {
79  .name = "ntp",
80  .exec = ntp_exec,
81 };
struct arbelprm_rc_send_wqe rc
Definition: arbel.h:14
int printf(const char *fmt,...)
Write a formatted string to the console.
Definition: vsprintf.c:464
int optind
Current option index.
Definition: getopt.c:51
A command-line command.
Definition: command.h:9
static union @424 opts
"cert<xxx>" option list
struct command ntp_command __command
NTP command.
Definition: ntp_cmd.c:78
int parse_options(int argc, char **argv, struct command_descriptor *cmd, void *opts)
Parse command-line options.
Definition: parseopt.c:447
A command descriptor.
Definition: parseopt.h:76
Parse command-line options.
static struct command_descriptor ntp_cmd
"ntp" command descriptor
Definition: ntp_cmd.c:46
int ntp(const char *hostname)
Get time and date via NTP.
Definition: ntpmgmt.c:45
char * strerror(int errno)
Retrieve string representation of error number.
Definition: strerror.c:78
static struct option_descriptor ntp_opts[]
"ntp" option list
Definition: ntp_cmd.c:43
Command line option parsing.
static int ntp_exec(int argc, char **argv)
"ntp" command
Definition: ntp_cmd.c:56
const char * name
Name of the command.
Definition: command.h:11
A command-line option descriptor.
Definition: parseopt.h:22
#define COMMAND_DESC(_struct, _options, _min_args, _max_args, _usage)
Construct command descriptor.
Definition: parseopt.h:107
FILE_LICENCE(GPL2_OR_LATER_OR_UBDL)
NTP management.
String functions.
"ntp" options
Definition: ntp_cmd.c:40