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
|
/*
* Guillaume Cottenceau (gc@mandrakesoft.com)
*
* Copyright 2000 MandrakeSoft
*
* This software may be freely redistributed under the terms of the GNU
* public license.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*
*/
/*
* Portions from Erik Troan (ewt@redhat.com)
*
* Copyright 1996 Red Hat Software
*
*/
#include <stdlib.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <string.h>
#include <ctype.h>
#include "stage1.h"
#include "log.h"
#include "tools.h"
int total_memory(void)
{
int fd;
int i;
char buf[4096];
char * memtotal_tag = "MemTotal:";
int memtotal = 0;
fd = open("/proc/meminfo", O_RDONLY);
if (fd == -1)
fatal_error("could not open /proc/meminfo");
i = read(fd, buf, sizeof(buf));
if (i < 0)
fatal_error("could not read /proc/meminfo");
close(fd);
buf[i] = 0;
i = 0;
while (buf[i] != 0 && strncmp(&buf[i], memtotal_tag, strlen(memtotal_tag)))
i++;
while (buf[i] != 0 && buf[i] != '\n' && !isdigit(buf[i]))
i++;
if (buf[i] == 0 || buf[i] == '\n')
fatal_error("could not read MemTotal");
while (buf[i] != 0 && isdigit(buf[i])) {
memtotal = (memtotal * 10) + (buf[i] - '0');
i++;
}
log_message("%s %d kB", memtotal_tag, memtotal);
return memtotal;
}
|
