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#include <stdio.h>
#include <sys/utsname.h>
#include "c.h"
#include "linux_version.h"
int get_linux_version (void)
{
static int kver = -1;
struct utsname uts;
int x = 0, y = 0, z = 0;
int n;
if (kver != -1)
return kver;
if (uname(&uts))
return kver = 0;
n = sscanf(uts.release, "%d.%d.%d", &x, &y, &z);
if (n < 1 || n > 3)
return kver = 0;
return kver = KERNEL_VERSION(x, y, z);
}
#ifdef TEST_PROGRAM_LINUXVERSION
# include <stdlib.h>
int main(int argc, char *argv[])
{
int rc = EXIT_FAILURE;
if (argc == 1) {
printf("Linux version: %d\n", get_linux_version());
rc = EXIT_SUCCESS;
} else if (argc == 5) {
const char *oper = argv[1];
int x = atoi(argv[2]),
y = atoi(argv[3]),
z = atoi(argv[4]);
int kver = get_linux_version();
int uver = KERNEL_VERSION(x, y, z);
if (strcmp(oper, "==") == 0)
rc = kver == uver;
else if (strcmp(oper, "<=") == 0)
rc = kver <= uver;
else if (strcmp(oper, ">=") == 0)
rc = kver >= uver;
else
errx(EXIT_FAILURE, "unsupported operator");
if (rc)
printf("match\n");
else
printf("not-match [%d %s %d, x.y.z: %d.%d.%d]\n",
kver, oper, uver, x, y, z);
rc = rc ? EXIT_SUCCESS : EXIT_FAILURE;
} else
fprintf(stderr, "Usage:\n"
" %s [<oper> <x> <y> <z>]\n"
"supported operators:\n"
" ==, <=, >=\n",
program_invocation_short_name);
return rc;
}
#endif
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