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1 /* smram-linux-tool.c
2  * General SMRAM manipulation utility
3  * NetWatch system management mode administration console
4  *
5  * Copyright (c) 2008 Jacob Potter and Joshua Wise.  All rights reserved.
6  * This program is free software; you can redistribute and/or modify it under
7  * the terms found in the file LICENSE in the root of this source tree.
8  *
9  */
10
11
12 #include <unistd.h>
13 #include <getopt.h>
14 #include <stdlib.h>
15 #include <stdio.h>
16 #include <smram.h>
17
18 static struct option longopts[] = {
19         { "open",       no_argument,    NULL,   'o'     },
20         { "close",      no_argument,    NULL,   'c'     },
21         { "dump",       no_argument,    NULL,   'd'     },
22         { NULL,         0,              NULL,   0       }
23 };
24
25 #define OP_DUMP 1
26 #define OP_SET 2
27
28 void usage(int argc, char **argv)
29 {
30         printf("Usage: %s [ --dump ] [ --open | --close ]\n",
31                 argv[0]);
32         exit(1);
33 }
34
35 int main(int argc, char **argv)
36 {
37         if (geteuid() != 0)
38         {
39                 printf("%s: This program must be run as root.\n", argv[0]);
40                 return 1;
41         }
42         
43         int ch;
44         int op = 0;
45         int do_open = 0;
46         while ((ch = getopt_long(argc, argv, "ocsd:", longopts, NULL)) != -1)
47         {
48                 switch (ch)
49                 {
50                 case 'o':
51                         if (op & OP_SET) usage(argc, argv);
52                         op |= OP_SET;
53                         do_open = 1;
54                         break;
55                 case 'c':
56                         if (op & OP_SET) usage(argc, argv);
57                         op |= OP_SET;
58                         break;
59                 case 'd':
60                         op |= OP_DUMP;
61                         break;
62                 default:
63                         usage(argc, argv);
64                 }
65         }
66
67         if (!op) usage(argc, argv);
68
69         if (op & OP_DUMP)
70         {
71                 smram_aseg_dump();
72         }
73
74         if (op & OP_SET)
75         {
76                 smram_aseg_set_state(do_open ? SMRAM_ASEG_OPEN : SMRAM_ASEG_SMMONLY);
77         }
78         
79         return 0;
80 }
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