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authorEric Andersen2000-06-26 10:45:52 +0000
committerEric Andersen2000-06-26 10:45:52 +0000
commit10dc9d4d17e6880bfdfd253716ce72ec1243227f (patch)
treef3c2aa6ab3dadf1b4bf710c7957e72faddebd75f /init
parent8a24a6783af7a0d54b1f2ebcda5b07757bd19c99 (diff)
downloadbusybox-10dc9d4d17e6880bfdfd253716ce72ec1243227f.zip
busybox-10dc9d4d17e6880bfdfd253716ce72ec1243227f.tar.gz
Updates to handle Linux 2.4.0 kernels (kludged around the "none" entries in
/proc/mounts, added a hack to make sysinfo work with both old and new kernels). -Erik
Diffstat (limited to 'init')
-rw-r--r--init/init.c20
1 files changed, 17 insertions, 3 deletions
diff --git a/init/init.c b/init/init.c
index 98a58f2..9289b86 100644
--- a/init/init.c
+++ b/init/init.c
@@ -42,7 +42,6 @@
#include <linux/version.h>
#include <linux/reboot.h>
#include <linux/unistd.h>
-#include <sys/sysinfo.h> /* For check_free_memory() */
#include <sys/fcntl.h>
#include <sys/ioctl.h>
#include <sys/mount.h>
@@ -270,13 +269,28 @@ static int check_free_memory()
{
struct sysinfo info;
+ /* Pre initialize mem_unit in case this kernel is something prior to
+ * the linux 2.4 kernel (which will actually fill in mem_unit... */
sysinfo(&info);
if (sysinfo(&info) != 0) {
- message(LOG, "Error checking free memory: %s\n", strerror(errno));
+ printf("Error checking free memory: %s\n", strerror(errno));
return -1;
}
+ if (info.mem_unit==0) {
+ /* Looks like we have a kernel prior to Linux 2.4.x */
+ info.mem_unit=1024;
+ info.totalram/=info.mem_unit;
+ info.totalswap/=info.mem_unit;
+ } else {
+ /* Bah. Linux 2.4.x completely changed sysinfo. This can in theory
+ overflow a 32 bit unsigned long, but who puts more then 4GiB ram+swap
+ on an embedded system? */
+ info.mem_unit/=1024;
+ info.totalram*=info.mem_unit;
+ info.totalswap*=info.mem_unit;
+ }
- return((info.totalram+info.totalswap)/1024);
+ return(info.totalram+info.totalswap);
}
static void console_init()