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#include <stdio.h>
#include <stdlib.h>
#include <hurd/process.h>
#include "procfs.h"
#include "procfs_dir.h"
#include "process.h"
struct process_node {
process_t procserv;
pid_t pid;
struct procinfo info;
};
/* The proc_getprocargs() and proc_getprocenv() calls have the same
prototype and we use them in the same way; namely, publish the data
they return as-is. We take advantage of this to have common code and
use a function pointer as the procfs_dir "entry hook" to choose the
call to use on a file by file basis. */
struct process_argz_node
{
struct process_node pn;
error_t (*getargz) (process_t, pid_t, void **, mach_msg_type_number_t *);
};
static error_t
process_argz_get_contents (void *hook, void **contents, size_t *contents_len)
{
struct process_argz_node *pz = hook;
error_t err;
*contents_len = 0;
err = pz->getargz (pz->pn.procserv, pz->pn.pid, contents, contents_len);
if (err)
return EIO;
return 0;
}
static struct node *
process_argz_make_node (void *dir_hook, void *entry_hook)
{
static const struct procfs_node_ops ops = {
.get_contents = process_argz_get_contents,
.cleanup_contents = procfs_cleanup_contents_with_vm_deallocate,
.cleanup = free,
};
struct process_argz_node *zn;
zn = malloc (sizeof *zn);
if (! zn)
return NULL;
memcpy (&zn->pn, dir_hook, sizeof zn->pn);
zn->getargz = entry_hook;
return procfs_make_node (&ops, zn);
}
/* The other files don't need any information besides the data in struct
process_node. Furthermore, their contents don't have any nul byte.
Consequently, we use a simple "multiplexer" based on the information
below. */
struct process_file_node
{
struct process_node pn;
error_t (*get_contents) (struct process_node *pn, char **contents);
};
static char mapstate (int hurd_state)
{
return '?';
}
static error_t
process_file_gc_stat (struct process_node *pn, char **contents)
{
char *argz;
size_t argz_len;
int len;
argz = NULL, argz_len = 0;
proc_getprocargs(pn->procserv, pn->pid, &argz, &argz_len);
len = asprintf (contents,
"%d (%s) %c " /* pid, command, state */
"%d %d %d " /* ppid, pgid, session */
"%d %d " /* controling tty stuff */
"%u " /* flags, as defined by <linux/sched.h> */
"%lu %lu %lu %lu " /* page fault counts */
"%lu %lu %ld %ld " /* user/sys times, in sysconf(_SC_CLK_TCK) */
"%ld %ld " /* scheduler params (priority, nice) */
"%ld %ld " /* number of threads, [obsolete] */
"%llu " /* start time since boot (jiffies) */
"%lu %ld %lu " /* virtual size, rss, rss limit */
"%lu %lu %lu %lu %lu " /* some vm addresses (code, stack, sp, pc) */
"%lu %lu %lu %lu " /* pending, blocked, ignored and caught sigs */
"%lu " /* wait channel */
"%lu %lu " /* swap usage (not maintained in Linux) */
"%d " /* exit signal, to be sent to the parent */
"%d " /* last processor used */
"%u %u " /* RT priority and policy */
"%llu " /* aggregated block I/O delay */
"\n",
pn->pid, argz ?: "", mapstate (pn->info.state),
pn->info.ppid, pn->info.pgrp, pn->info.session,
0, 0,
0,
0L, 0L, 0L, 0L,
0L, 0L, 0L, 0L,
0L, 0L,
0L, 0L,
0LL,
0L, 0L, 0L,
0L, 0L, 0L, 0L, 0L,
0L, 0L, 0L, 0L,
0L,
0L, 0L,
0,
0,
0, 0,
0LL);
vm_deallocate (mach_task_self (), (vm_address_t) argz, argz_len);
if (len < 0)
return ENOMEM;
return 0;
}
static error_t
process_file_get_contents (void *hook, void **contents, size_t *contents_len)
{
struct process_file_node *fn = hook;
error_t err;
err = fn->get_contents (&fn->pn, (char **) contents);
if (err)
return err;
*contents_len = strlen (*contents);
return 0;
}
static struct node *
process_file_make_node (void *dir_hook, void *entry_hook)
{
static const struct procfs_node_ops ops = {
.get_contents = process_file_get_contents,
.cleanup_contents = procfs_cleanup_contents_with_free,
.cleanup = free,
};
struct process_file_node *fn;
fn = malloc (sizeof *fn);
if (! fn)
return NULL;
memcpy (&fn->pn, dir_hook, sizeof fn->pn);
fn->get_contents = entry_hook;
return procfs_make_node (&ops, fn);
}
static struct node *
process_make_node (process_t procserv, pid_t pid, const struct procinfo *info)
{
static const struct procfs_dir_entry entries[] = {
{ "cmdline", process_argz_make_node, proc_getprocargs, },
{ "environ", process_argz_make_node, proc_getprocenv, },
{ "stat", process_file_make_node, process_file_gc_stat, },
{ NULL, }
};
struct process_node *pn;
struct node *np;
pn = malloc (sizeof *pn);
if (! pn)
return NULL;
pn->procserv = procserv;
pn->pid = pid;
memcpy (&pn->info, info, sizeof pn->info);
np = procfs_dir_make_node (entries, pn, process_cleanup);
np->nn_stat.st_uid = pn->info.owner;
return np;
}
error_t
process_lookup_pid (process_t procserv, pid_t pid, struct node **np)
{
procinfo_t info;
size_t info_sz;
data_t tw;
size_t tw_sz;
int flags;
error_t err;
tw_sz = info_sz = 0, flags = 0;
err = proc_getprocinfo (procserv, pid, &flags, &info, &info_sz, &tw, &tw_sz);
if (err == ESRCH)
return ENOENT;
if (err)
return EIO;
assert (info_sz * sizeof *info >= sizeof (struct procinfo));
*np = process_make_node (procserv, pid, (struct procinfo *) info);
vm_deallocate (mach_task_self (), (vm_address_t) info, info_sz);
if (! *np)
return ENOMEM;
return 0;
}
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