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authorGlenn L McGrath2003-08-26 02:14:58 +0000
committerGlenn L McGrath2003-08-26 02:14:58 +0000
commitce6482eace34fcd43e2f5310997f5366706f077e (patch)
treeb4dc3185dc7d6a32585d4311baa3430da05e26f9 /init
parent97e242658265ed97badfecd3a5d7f596077716d0 (diff)
downloadbusybox-ce6482eace34fcd43e2f5310997f5366706f077e.zip
busybox-ce6482eace34fcd43e2f5310997f5366706f077e.tar.gz
Fix overflow for machines greater than 4GB, return unsigned int to avoid
a cast and for greater accuracy.
Diffstat (limited to 'init')
-rw-r--r--init/init.c11
1 files changed, 6 insertions, 5 deletions
diff --git a/init/init.c b/init/init.c
index 1ecc43e..e52517e 100644
--- a/init/init.c
+++ b/init/init.c
@@ -310,7 +310,7 @@ static void set_term(int fd)
/* How much memory does this machine have?
Units are kBytes to avoid overflow on 4GB machines */
-static int check_free_memory(void)
+static unsigned int check_free_memory(void)
{
struct sysinfo info;
unsigned int result, u, s = 10;
@@ -330,10 +330,11 @@ static int check_free_memory(void)
s--;
}
result = (info.totalram >> s) + (info.totalswap >> s);
- result = result * u;
- if (result < 0)
- result = INT_MAX;
- return result;
+ if ((unsigned long long) (result * u) > UINT_MAX) {
+ return(UINT_MAX);
+ } else {
+ return(result * u);
+ }
}
static void console_init(void)