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#include "kexec.h"
#include <errno.h>
#include <string.h>
#include <sys/utsname.h>
#include <string.h>
#include <limits.h>
#include <stdlib.h>
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 (minor == ULONG_MAX) {
fprintf(stderr, "strtoul failed: %s\n", strerror(errno));
return -1;
}
/* There may or may not be a patch level for this kernel */
if (*p++ == '.') {
patch = strtoul(p, &p, 10);
if (patch == ULONG_MAX) {
fprintf(stderr, "strtoul failed: %s\n",strerror(errno));
return -1;
}
} else {
patch = 0;
}
if (major >= 256 || minor >= 256 || patch >= 256) {
fprintf(stderr, "Unsupported utsname.release: %s\n",
utsname.release);
return -1;
}
return KERNEL_VERSION(major, minor, patch);
}
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