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#include <mach/vm_statistics.h>
#include <stdio.h>
#include <sys/time.h>
#include <sys/utsname.h>
#include <ps.h>
#include "procfs.h"
#include "procfs_dir.h"
/* This implements a directory node with the static files in /proc */
#define INIT_PID 1
static error_t
get_boottime (struct ps_context *pc, struct timeval *tv)
{
struct proc_stat *ps;
error_t err;
err = _proc_stat_create (INIT_PID, pc, &ps);
if (err)
return err;
err = proc_stat_set_flags (ps, PSTAT_TASK_BASIC);
if (err || !(proc_stat_flags (ps) & PSTAT_TASK_BASIC))
err = EIO;
if (! err)
{
task_basic_info_t tbi = proc_stat_task_basic_info (ps);
tv->tv_sec = tbi->creation_time.seconds;
tv->tv_usec = tbi->creation_time.microseconds;
}
_proc_stat_free (ps);
return err;
}
static error_t
rootdir_gc_version (void *hook, void **contents, size_t *contents_len)
{
struct utsname uts;
int r;
r = uname (&uts);
if (r < 0)
return errno;
*contents_len = asprintf ((char **) contents,
"Linux version 2.6.1 (%s %s %s %s)\n",
uts.sysname, uts.release, uts.version, uts.machine);
return *contents_len >= 0 ? 0 : ENOMEM;
}
/* Uptime -- we use the start time of init to deduce it. This is probably a bit
fragile, as any clock update will make the result inaccurate. */
static error_t
rootdir_gc_uptime (void *hook, void **contents, size_t *contents_len)
{
struct timeval time, boottime;
double up_secs;
error_t err;
err = gettimeofday (&time, NULL);
if (err < 0)
return errno;
err = get_boottime (hook, &boottime);
if (err)
return err;
timersub (&time, &boottime, &time);
up_secs = time.tv_sec + time.tv_usec / 1000000.;
/* The second field is the total idle time. As far as I know we don't
keep track of it. */
*contents_len = asprintf ((char **) contents, "%.2lf %.2lf\n", up_secs, 0.);
return *contents_len >= 0 ? 0 : ENOMEM;
}
static error_t
rootdir_gc_stat (void *hook, void **contents, size_t *contents_len)
{
struct timeval boottime;
struct vm_statistics vmstats;
error_t err;
err = get_boottime (hook, &boottime);
if (err)
return err;
err = vm_statistics (mach_task_self (), &vmstats);
if (err)
return EIO;
*contents_len = asprintf ((char **) contents,
/* Does Mach keeps track of any of this? */
"cpu 0 0 0 0 0 0 0 0 0\n"
"cpu0 0 0 0 0 0 0 0 0 0\n"
"intr 0\n"
/* This we know. */
"page %d %d\n"
"btime %lu\n",
vmstats.pageins, vmstats.pageouts,
boottime.tv_sec);
return *contents_len >= 0 ? 0 : ENOMEM;
}
static error_t
rootdir_gc_loadavg (void *hook, void **contents, size_t *contents_len)
{
host_load_info_data_t hli;
mach_msg_type_number_t cnt;
error_t err;
cnt = HOST_LOAD_INFO_COUNT;
err = host_info (mach_host_self (), HOST_LOAD_INFO, (host_info_t) &hli, &cnt);
if (err)
return err;
assert (cnt == HOST_LOAD_INFO_COUNT);
*contents_len = asprintf ((char **) contents,
"%.2f %.2f %.2f 1/0 0\n",
hli.avenrun[0] / (double) LOAD_SCALE,
hli.avenrun[1] / (double) LOAD_SCALE,
hli.avenrun[2] / (double) LOAD_SCALE);
return *contents_len >= 0 ? 0 : ENOMEM;
}
static struct node *
rootdir_file_make_node (void *dir_hook, void *entry_hook)
{
return procfs_make_node (entry_hook, dir_hook);
}
static struct procfs_dir_entry rootdir_entries[] = {
{
.name = "version",
.make_node = rootdir_file_make_node,
.hook = & (struct procfs_node_ops) {
.get_contents = rootdir_gc_version,
.cleanup_contents = procfs_cleanup_contents_with_free,
},
},
{
.name = "uptime",
.make_node = rootdir_file_make_node,
.hook = & (struct procfs_node_ops) {
.get_contents = rootdir_gc_uptime,
.cleanup_contents = procfs_cleanup_contents_with_free,
},
},
{
.name = "stat",
.make_node = rootdir_file_make_node,
.hook = & (struct procfs_node_ops) {
.get_contents = rootdir_gc_stat,
.cleanup_contents = procfs_cleanup_contents_with_free,
},
},
{
.name = "loadavg",
.make_node = rootdir_file_make_node,
.hook = & (struct procfs_node_ops) {
.get_contents = rootdir_gc_loadavg,
.cleanup_contents = procfs_cleanup_contents_with_free,
},
},
{}
};
error_t
rootdir_create_node (struct node **np)
{
struct ps_context *pc;
error_t err;
err = ps_context_create (getproc (), &pc);
if (err)
return err;
*np = procfs_dir_make_node (rootdir_entries, pc,
(void (*)(void *)) ps_context_free);
return 0;
}
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