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-rw-r--r--utility.c15
1 files changed, 5 insertions, 10 deletions
diff --git a/utility.c b/utility.c
index 5bfed81..64598fa 100644
--- a/utility.c
+++ b/utility.c
@@ -48,6 +48,7 @@
#include <unistd.h>
#include <ctype.h>
#include <sys/param.h> /* for PATH_MAX */
+#include <sys/utsname.h> /* for uname(2) */
#if defined BB_FEATURE_MOUNT_LOOP
#include <fcntl.h>
@@ -103,26 +104,20 @@ extern void fatalError(char *s, ...)
}
#if defined (BB_INIT) || defined (BB_PS)
-
-#if ! defined BB_FEATURE_USE_PROCFS
-#error Sorry, I depend on the /proc filesystem right now.
-#endif
/* Returns kernel version encoded as major*65536 + minor*256 + patch,
* so, for example, to check if the kernel is greater than 2.2.11:
* if (get_kernel_revision() <= 2*65536+2*256+11) { <stuff> }
*/
int get_kernel_revision()
{
- FILE *file;
+ struct utsname name;
int major = 0, minor = 0, patch = 0;
- file = fopen("/proc/sys/kernel/osrelease", "r");
- if (file == NULL) {
- /* bummer, /proc must not be mounted... */
+ if (uname(&name) == -1) {
+ perror("cannot get system information");
return (0);
}
- fscanf(file, "%d.%d.%d", &major, &minor, &patch);
- fclose(file);
+ sscanf(name.version, "%d.%d.%d", &major, &minor, &patch);
return major * 65536 + minor * 256 + patch;
}
#endif /* BB_INIT || BB_PS */