With kernel 2.3.99pre2 sysctl fails for me - it worked with 2.3.48
(last kernel I tried).
CONFIG_SYSCTL is enabled:
gromit:/usr/src/linux-2.3.x:[0]$ grep SYSCTL .config
CONFIG_SYSCTL=y
strace outputs for the appended program:
[...]
_sysctl({{CTL_KERN, KERN_OSRELEASE}, 2, "", 64, NULL, 0}) = -1 ENOTDIR (Not a directory)
write(2, "sysctl failed: Not a directory\n", 31sysctl failed: Not a directory
) = 31
The proc file system works:
cat /proc/sys/kernel/osrelease
2.3.99-pre2
Is this an error with the used list implementation in kernel/sysctl.c?
Andreas
P.S. Here's my test program:
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
#include <unistd.h>
#include <sys/param.h>
#include <sys/sysctl.h>
#include <stdio.h>
int
main (void)
{
static const int sysctl_args[] = { CTL_KERN, KERN_OSRELEASE };
static char buf[64];
size_t reslen = sizeof (buf);
/* Try reading the number using `sysctl' first. */
if (sysctl ((int *) sysctl_args,
sizeof (sysctl_args) / sizeof (sysctl_args[0]),
buf, &reslen, NULL, 0) < 0)
{
perror ("sysctl failed");
}
else
{
buf[MIN (reslen, sizeof (buf) - 1)] = '\0';
printf ("Returned: %s\n", buf);
}
return 0;
}
-- Andreas Jaeger SuSE Labs aj@suse.de private aj@arthur.rhein-neckar.de- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.rutgers.edu Please read the FAQ at http://www.tux.org/lkml/
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