From 3cab31db10dd74aa148ad20aaa3455723bf45138 Mon Sep 17 00:00:00 2001 From: "Eric W. Biederman" Date: Tue, 7 Sep 2010 11:25:30 -0700 Subject: kexec: Move kernel_version into the kexec core I'm not pleased with the hacks that we use kernel_version for but kernel_version itself is reasonable code and might be needed elsewhere, so move kernel_version into the kexec core. Signed-off-by: Eric W. Biederman --- kexec/kernel_version.c | 58 ++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 58 insertions(+) create mode 100644 kexec/kernel_version.c (limited to 'kexec/kernel_version.c') diff --git a/kexec/kernel_version.c b/kexec/kernel_version.c new file mode 100644 index 0000000..079312b --- /dev/null +++ b/kexec/kernel_version.c @@ -0,0 +1,58 @@ +#include "kexec.h" +#include +#include +#include +#include +#include +#include + +long kernel_version(void) +{ + struct utsname utsname; + unsigned long major, minor, patch; + char *p; + + if (uname(&utsname) < 0) { + fprintf(stderr, "uname failed: %s\n", strerror(errno)); + return -1; + } + + p = utsname.release; + major = strtoul(p, &p, 10); + if (major == ULONG_MAX) { + fprintf(stderr, "strtoul failed: %s\n", strerror(errno)); + return -1; + } + + if (*p++ != '.') { + fprintf(stderr, "Unsupported utsname.release: %s\n", + utsname.release); + return -1; + } + + minor = strtoul(p, &p, 10); + if (major == ULONG_MAX) { + fprintf(stderr, "strtoul failed: %s\n", strerror(errno)); + return -1; + } + + if (*p++ != '.') { + fprintf(stderr, "Unsupported utsname.release: %s\n", + utsname.release); + return -1; + } + + patch = strtoul(p, &p, 10); + if (major == ULONG_MAX) { + fprintf(stderr, "strtoul failed: %s\n", strerror(errno)); + return -1; + } + + if (major >= 256 || minor >= 256 || patch >= 256) { + fprintf(stderr, "Unsupported utsname.release: %s\n", + utsname.release); + return -1; + } + + return KERNEL_VERSION(major, minor, patch); +} -- cgit