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#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);
}
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, },
{ 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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