1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
|
/**
* Copyright © 2015, 2016 Mattias Andrée <maandree@member.fsf.org>
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
* DEALINGS IN THE SOFTWARE.
*/
#include "parse_time.h"
#include "client.h"
#include "common.h"
#include <errno.h>
#include <unistd.h>
COMMAND("sat")
USAGE("TIME COMMAND...")
/**
* Queue a job for later execution.
*
* @param argc You guess!
* @param argv The first element should be the name of the process,
* the second argument should be the POSIX time (seconds
* since Epoch (1970-01-01 00:00:00 UTC), disregarding
* leap seconds) the job shall be executed. The rest of
* the arguments (being at least one) shoul be the
* command line arguments for the job the run.
* @param envp The environment.
* @return 0 The process was successful.
* @return 1 The process failed queuing the job.
* @return 2 User error, you do not know what you are doing.
* @return 3 satd(1) failed to queue the job.
*/
int
main(int argc, char *argv[], char *envp[])
{
#define E(CASE, DESC) case CASE: return fprintf(stderr, "%s: %s: %s\n", argv0, DESC, argv[1]), 2
struct timespec ts;
clockid_t clk;
char *msg = NULL;
void *new;
size_t n, size = 64;
if ((argc < 3) || (argv[1][0] == '-'))
usage();
argv0 = argv[0];
/* Parse the time argument. */
if (parse_time(argv[1], &ts, &clk)) {
switch (errno) {
E (EINVAL, "time parameter cound not be parsed, perhaps you need an external parser");
E (ERANGE, "the specified time is beyond the limit of what can be stored");
E (EDOM, "the specified time is in past, and more than a day ago");
default: goto fail;
}
}
argc -= 2;
argv += 2;
retry:
/* Get the size of the current working directory's pathname. */
t (!(new = realloc(msg, size <<= 1)));
if (!getcwd(msg = new, size)) {
t (errno != ERANGE);
goto retry;
}
size = strlen(getcwd(msg, size)) + 1, free(msg);
/* Construct message to send to the daemon. */
n = measure_array(argv) + size + measure_array(envp);
t (!(msg = malloc(n + sizeof(argc) + sizeof(clk) + sizeof(ts))));
store_array(getcwd(store_array(msg, argv), size) + size, envp);
memcpy(msg + n, &argc, sizeof(argc)), n += sizeof(argc);
memcpy(msg + n, &clk, sizeof(clk)), n += sizeof(clk);
memcpy(msg + n, &ts, sizeof(ts)), n += sizeof(ts);
/* Send job to daemon, start daemon if necessary. */
SEND(SAT_QUEUE, n, msg);
END(msg);
}
|
