diff options
Diffstat (limited to 'libbb/kernel_version.c')
-rw-r--r-- | libbb/kernel_version.c | 37 |
1 files changed, 37 insertions, 0 deletions
diff --git a/libbb/kernel_version.c b/libbb/kernel_version.c new file mode 100644 index 0000000..8b9c4ec --- /dev/null +++ b/libbb/kernel_version.c @@ -0,0 +1,37 @@ +/* vi: set sw=4 ts=4: */ +/* + * Utility routines. + * + * Copyright (C) 1999-2004 by Erik Andersen <andersen@codepoet.org> + * + * Licensed under GPLv2 or later, see file LICENSE in this tarball for details. + */ + +#include <sys/utsname.h> /* for uname(2) */ + +#include "libbb.h" + +/* Returns current 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_linux_version_code() > KERNEL_VERSION(2,2,11)) { <stuff> } + */ +int FAST_FUNC get_linux_version_code(void) +{ + struct utsname name; + char *s; + int i, r; + + if (uname(&name) == -1) { + bb_perror_msg("cannot get system information"); + return 0; + } + + s = name.release; + r = 0; + for (i = 0; i < 3; i++) { + r = r * 256 + atoi(strtok(s, ".")); + s = NULL; + } + return r; +} |