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
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
|
/**
* mds — A micro-display server
* Copyright © 2014 Mattias Andrée (maandree@member.fsf.org)
*
* This program 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.
*
* This program 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 this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "mds-server.h"
#include "config.h"
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <ctype.h>
#include <limits.h>
/**
* Number of elements in `argv`
*/
static int argc;
/**
* Command line arguments
*/
static char** argv;
/**
* Entry point of the server
*
* @param argc_ Number of elements in `argv_`
* @param argv_ Command line arguments
* @return Non-zero on error
*/
int main(int argc_, char** argv_)
{
char* unparsed_args[ARGC_LIMIT + LIBEXEC_ARGC_EXTRA_LIMIT + 1];
int i;
int is_respawn = -1;
int socket_fd = -1;
int unparsed_args_ptr = 0;
argc = argc_;
argv = argv_;
/* Sanity check the number of command line arguments. */
if (argc > ARGC_LIMIT + LIBEXEC_ARGC_EXTRA_LIMIT)
{
fprintf(stderr,
"%s: that number of arguments is ridiculous, I will not allow it.\n",
*argv);
return 1;
}
/* Parse command line arguments. */
for (i = 1; i < argc; i++)
{
char* arg = argv[i];
if (!strcmp(arg, "--initial-spawn")) /* Initial spawn? */
if (is_respawn == 1)
{
fprintf(stderr,
"%s: conflicting arguments %s and %s cannot be combined.\n",
*argv, "--initial-spawn", "--respawn");
return 1;
}
else
is_respawn = 0;
else if (!strcmp(arg, "--respawn")) /* Respawning after crash? */
if (is_respawn == 0)
{
fprintf(stderr,
"%s: conflicting arguments %s and %s cannot be combined.\n",
*argv, "--initial-spawn", "--respawn");
return 1;
}
else
is_respawn = 1;
else if (strstr(arg, "--socket-fd=") == arg) /* Socket file descriptor. */
{
long int r;
char* endptr;
if (socket_fd != -1)
{
fprintf(stderr, "%s: duplicate declaration of %s.\n", *argv, "--socket-fd");
return -1;
}
arg += strlen("--socket-fd=");
r = strtol(arg, &endptr, 10);
if ((*argv == '\0') || isspace(*argv) ||
(endptr - arg != (ssize_t)strlen(arg))
|| (r < 0) || (r > INT_MAX))
{
fprintf(stderr, "%s: invalid value for %s: %s.\n", *argv, "--socket-fd", arg);
return 1;
}
socket_fd = (int)r;
}
else
/* Not recognised, it is probably for another server. */
unparsed_args[unparsed_args_ptr++] = arg;
}
unparsed_args[unparsed_args_ptr] = NULL;
/* Check that manditory arguments have been specified. */
if (is_respawn < 0)
{
fprintf(stderr,
"%s: missing state argument, require either %s or %s.\n",
*argv, "--initial-spawn", "--respawn");
return 1;
}
if (socket_fd < 0)
{
fprintf(stderr, "%s: missing socket file descriptor argument.\n", *argv);
return 1;
}
return 0;
}
|
