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|
/* fhandler_process.cc: fhandler for /proc/<pid> virtual filesystem
Copyright 2002, 2003 Red Hat, Inc.
This file is part of Cygwin.
This software is a copyrighted work licensed under the terms of the
Cygwin license. Please consult the file "CYGWIN_LICENSE" for
details. */
#include "winsup.h"
#include <unistd.h>
#include <stdlib.h>
#include <sys/cygwin.h>
#include <ntdef.h>
#include "cygerrno.h"
#include "security.h"
#include "fhandler.h"
#include "pinfo.h"
#include "path.h"
#include "shared_info.h"
#include "dtable.h"
#include "cygheap.h"
#include "ntdll.h"
#include <sys/param.h>
#include <assert.h>
#include <sys/sysmacros.h>
#define _COMPILING_NEWLIB
#include <dirent.h>
static const int PROCESS_PPID = 2;
static const int PROCESS_EXENAME = 3;
static const int PROCESS_WINPID = 4;
static const int PROCESS_WINEXENAME = 5;
static const int PROCESS_STATUS = 6;
static const int PROCESS_UID = 7;
static const int PROCESS_GID = 8;
static const int PROCESS_PGID = 9;
static const int PROCESS_SID = 10;
static const int PROCESS_CTTY = 11;
static const int PROCESS_STAT = 12;
static const int PROCESS_STATM = 13;
static const int PROCESS_CMDLINE = 14;
static const char * const process_listing[] =
{
".",
"..",
"ppid",
"exename",
"winpid",
"winexename",
"status",
"uid",
"gid",
"pgid",
"sid",
"ctty",
"stat",
"statm",
"cmdline",
NULL
};
static const int PROCESS_LINK_COUNT =
(sizeof (process_listing) / sizeof (const char *)) - 1;
static _off64_t format_process_stat (_pinfo *p, char *destbuf, size_t maxsize);
static _off64_t format_process_status (_pinfo *p, char *destbuf, size_t maxsize);
static _off64_t format_process_statm (_pinfo *p, char *destbuf, size_t maxsize);
static int get_process_state (DWORD dwProcessId);
static bool get_mem_values (DWORD dwProcessId, unsigned long *vmsize,
unsigned long *vmrss, unsigned long *vmtext,
unsigned long *vmdata, unsigned long *vmlib,
unsigned long *vmshare);
/* Returns 0 if path doesn't exist, >0 if path is a directory,
* <0 if path is a file.
*/
int
fhandler_process::exists ()
{
const char *path = get_name ();
debug_printf ("exists (%s)", path);
path += proc_len + 1;
while (*path != 0 && !isdirsep (*path))
path++;
if (*path == 0)
return 2;
for (int i = 0; process_listing[i]; i++)
if (pathmatch (path + 1, process_listing[i]))
return -1;
return 0;
}
fhandler_process::fhandler_process ():
fhandler_proc (FH_PROCESS)
{
}
int
fhandler_process::fstat (struct __stat64 *buf, path_conv *pc)
{
const char *path = get_name ();
int file_type = exists ();
(void) fhandler_base::fstat (buf, pc);
path += proc_len + 1;
pid = atoi (path);
pinfo p (pid);
if (!p)
{
set_errno (ENOENT);
return -1;
}
buf->st_mode &= ~_IFMT & NO_W;
switch (file_type)
{
case 0:
set_errno (ENOENT);
return -1;
case 1:
buf->st_mode |= S_IFDIR | S_IXUSR | S_IXGRP | S_IXOTH;
return 0;
case 2:
buf->st_ctime = buf->st_mtime = p->start_time;
buf->st_ctim.tv_nsec = buf->st_mtim.tv_nsec = 0;
time_as_timestruc_t (&buf->st_atim);
buf->st_uid = p->uid;
buf->st_gid = p->gid;
buf->st_mode |= S_IFDIR | S_IXUSR | S_IXGRP | S_IXOTH;
buf->st_nlink = PROCESS_LINK_COUNT;
return 0;
default:
case -1:
buf->st_uid = p->uid;
buf->st_gid = p->gid;
buf->st_mode |= S_IFREG | S_IRUSR | S_IRGRP | S_IROTH;
return 0;
}
}
struct dirent *
fhandler_process::readdir (DIR * dir)
{
if (dir->__d_position >= PROCESS_LINK_COUNT)
return NULL;
strcpy (dir->__d_dirent->d_name, process_listing[dir->__d_position++]);
syscall_printf ("%p = readdir (%p) (%s)", &dir->__d_dirent, dir,
dir->__d_dirent->d_name);
return dir->__d_dirent;
}
int
fhandler_process::open (path_conv *pc, int flags, mode_t mode)
{
int process_file_no = -1;
int res = fhandler_virtual::open (pc, flags, mode);
if (!res)
goto out;
set_nohandle (true);
const char *path;
path = get_name () + proc_len + 1;
pid = atoi (path);
while (*path != 0 && !isdirsep (*path))
path++;
if (*path == 0)
{
if ((flags & (O_CREAT | O_EXCL)) == (O_CREAT | O_EXCL))
{
set_errno (EEXIST);
res = 0;
goto out;
}
else if (flags & O_WRONLY)
{
set_errno (EISDIR);
res = 0;
goto out;
}
else
{
flags |= O_DIROPEN;
goto success;
}
}
process_file_no = -1;
for (int i = 0; process_listing[i]; i++)
{
if (path_prefix_p
(process_listing[i], path + 1, strlen (process_listing[i])))
process_file_no = i;
}
if (process_file_no == -1)
{
if (flags & O_CREAT)
{
set_errno (EROFS);
res = 0;
goto out;
}
else
{
set_errno (ENOENT);
res = 0;
goto out;
}
}
if (flags & O_WRONLY)
{
set_errno (EROFS);
res = 0;
goto out;
}
fileid = process_file_no;
if (!fill_filebuf ())
{
res = 0;
goto out;
}
if (flags & O_APPEND)
position = filesize;
else
position = 0;
success:
res = 1;
set_flags ((flags & ~O_TEXT) | O_BINARY);
set_open_status ();
out:
syscall_printf ("%d = fhandler_proc::open (%p, %d)", res, flags, mode);
return res;
}
bool
fhandler_process::fill_filebuf ()
{
pinfo p (pid);
if (!p)
{
set_errno (ENOENT);
return false;
}
switch (fileid)
{
case PROCESS_UID:
case PROCESS_GID:
case PROCESS_PGID:
case PROCESS_SID:
case PROCESS_CTTY:
case PROCESS_PPID:
{
filebuf = (char *) realloc (filebuf, bufalloc = 40);
int num;
switch (fileid)
{
case PROCESS_PPID:
num = p->ppid;
break;
case PROCESS_UID:
num = p->uid;
break;
case PROCESS_PGID:
num = p->pgid;
break;
case PROCESS_SID:
num = p->sid;
break;
case PROCESS_GID:
num = p->gid;
break;
case PROCESS_CTTY:
num = p->ctty;
break;
default: // what's this here for?
num = 0;
break;
}
__small_sprintf (filebuf, "%d\n", num);
filesize = strlen (filebuf);
break;
}
case PROCESS_CMDLINE:
{
if (filebuf)
free (filebuf);
size_t fs;
filebuf = p->cmdline (fs);
filesize = fs;
if (!filebuf || !*filebuf)
filebuf = strdup ("<defunct>");
break;
}
case PROCESS_EXENAME:
{
filebuf = (char *) realloc (filebuf, bufalloc = MAX_PATH);
if (p->process_state & (PID_ZOMBIE | PID_EXITED))
strcpy (filebuf, "<defunct>");
else
{
mount_table->conv_to_posix_path (p->progname, filebuf, 1);
int len = strlen (filebuf);
if (len > 4)
{
char *s = filebuf + len - 4;
if (strcasecmp (s, ".exe") == 0)
*s = 0;
}
}
filesize = strlen (filebuf);
break;
}
case PROCESS_WINPID:
{
filebuf = (char *) realloc (filebuf, bufalloc = 40);
__small_sprintf (filebuf, "%d\n", p->dwProcessId);
filesize = strlen (filebuf);
break;
}
case PROCESS_WINEXENAME:
{
int len = strlen (p->progname);
filebuf = (char *) realloc (filebuf, bufalloc = (len + 2));
strcpy (filebuf, p->progname);
filebuf[len] = '\n';
filesize = len + 1;
break;
}
case PROCESS_STATUS:
{
filebuf = (char *) realloc (filebuf, bufalloc = 2048);
filesize = format_process_status (*p, filebuf, bufalloc);
break;
}
case PROCESS_STAT:
{
filebuf = (char *) realloc (filebuf, bufalloc = 2048);
filesize = format_process_stat (*p, filebuf, bufalloc);
break;
}
case PROCESS_STATM:
{
filebuf = (char *) realloc (filebuf, bufalloc = 2048);
filesize = format_process_statm (*p, filebuf, bufalloc);
break;
}
}
return true;
}
static _off64_t
format_process_stat (_pinfo *p, char *destbuf, size_t maxsize)
{
char cmd[MAX_PATH];
int state = 'R';
unsigned long fault_count = 0UL,
utime = 0UL, stime = 0UL,
start_time = 0UL,
vmsize = 0UL, vmrss = 0UL, vmmaxrss = 0UL;
int priority = 0;
if (p->process_state & (PID_ZOMBIE | PID_EXITED))
strcpy (cmd, "<defunct>");
else
{
strcpy (cmd, p->progname);
char *last_slash = strrchr (cmd, '\\');
if (last_slash != NULL)
strcpy (cmd, last_slash + 1);
int len = strlen (cmd);
if (len > 4)
{
char *s = cmd + len - 4;
if (strcasecmp (s, ".exe") == 0)
*s = 0;
}
}
/*
* Note: under Windows, a _process_ is always running - it's only _threads_
* that get suspended. Therefore the default state is R (runnable).
*/
if (p->process_state & PID_ZOMBIE)
state = 'Z';
else if (p->process_state & PID_STOPPED)
state = 'T';
else if (wincap.is_winnt ())
state = get_process_state (p->dwProcessId);
if (!wincap.is_winnt ())
start_time = (GetTickCount () / 1000 - time (NULL) + p->start_time) * HZ;
else
{
NTSTATUS ret;
HANDLE hProcess;
VM_COUNTERS vmc;
KERNEL_USER_TIMES put;
PROCESS_BASIC_INFORMATION pbi;
QUOTA_LIMITS ql;
SYSTEM_TIME_OF_DAY_INFORMATION stodi;
SYSTEM_PROCESSOR_TIMES spt;
hProcess = OpenProcess (PROCESS_VM_READ | PROCESS_QUERY_INFORMATION,
FALSE, p->dwProcessId);
if (hProcess != NULL)
{
ret = NtQueryInformationProcess (hProcess,
ProcessVmCounters,
(PVOID) &vmc,
sizeof vmc, NULL);
if (ret == STATUS_SUCCESS)
ret = NtQueryInformationProcess (hProcess,
ProcessTimes,
(PVOID) &put,
sizeof put, NULL);
if (ret == STATUS_SUCCESS)
ret = NtQueryInformationProcess (hProcess,
ProcessBasicInformation,
(PVOID) &pbi,
sizeof pbi, NULL);
if (ret == STATUS_SUCCESS)
ret = NtQueryInformationProcess (hProcess,
ProcessQuotaLimits,
(PVOID) &ql,
sizeof ql, NULL);
CloseHandle (hProcess);
}
else
{
DWORD error = GetLastError ();
__seterrno_from_win_error (error);
debug_printf ("OpenProcess: ret = %d",
error);
return 0;
}
if (ret == STATUS_SUCCESS)
ret = NtQuerySystemInformation (SystemTimeOfDayInformation,
(PVOID) &stodi,
sizeof stodi, NULL);
if (ret == STATUS_SUCCESS)
ret = NtQuerySystemInformation (SystemProcessorTimes,
(PVOID) &spt,
sizeof spt, NULL);
if (ret != STATUS_SUCCESS)
{
__seterrno_from_win_error (RtlNtStatusToDosError (ret));
debug_printf ("NtQueryInformationProcess: ret = %d, "
"Dos(ret) = %d",
ret, RtlNtStatusToDosError (ret));
return 0;
}
fault_count = vmc.PageFaultCount;
utime = put.UserTime.QuadPart * HZ / 10000000ULL;
stime = put.KernelTime.QuadPart * HZ / 10000000ULL;
start_time = (put.CreateTime.QuadPart - stodi.BootTime.QuadPart) * HZ / 10000000ULL;
#if 0
if (stodi.CurrentTime.QuadPart > put.CreateTime.QuadPart)
start_time = (spt.KernelTime.QuadPart + spt.UserTime.QuadPart -
stodi.CurrentTime.QuadPart + put.CreateTime.QuadPart) * HZ / 10000000ULL;
else
/*
* sometimes stodi.CurrentTime is a bit behind
* Note: some older versions of procps are broken and can't cope
* with process start times > time(NULL).
*/
start_time = (spt.KernelTme.QuadPart + spt.UserTime.QuadPart) * HZ / 10000000ULL;
#endif
priority = pbi.BasePriority;
unsigned page_size = getpagesize ();
vmsize = vmc.PagefileUsage;
vmrss = vmc.WorkingSetSize / page_size;
vmmaxrss = ql.MaximumWorkingSetSize / page_size;
}
return __small_sprintf (destbuf, "%d (%s) %c "
"%d %d %d %d %d "
"%lu %lu %lu %lu %lu %lu %lu "
"%ld %ld %ld %ld %ld %ld "
"%lu %lu "
"%ld "
"%lu",
p->pid, cmd,
state,
p->ppid, p->pgid, p->sid, makedev (FH_TTYS, p->ctty),
-1, 0, fault_count, fault_count, 0, 0, utime, stime,
utime, stime, priority, 0, 0, 0,
start_time, vmsize,
vmrss, vmmaxrss
);
}
static _off64_t
format_process_status (_pinfo *p, char *destbuf, size_t maxsize)
{
char cmd[MAX_PATH];
int state = 'R';
const char *state_str = "unknown";
unsigned long vmsize = 0UL, vmrss = 0UL, vmdata = 0UL, vmlib = 0UL, vmtext = 0UL,
vmshare = 0UL;
if (p->process_state & (PID_ZOMBIE | PID_EXITED))
strcpy (cmd, "<defunct>");
else
{
strcpy (cmd, p->progname);
char *last_slash = strrchr (cmd, '\\');
if (last_slash != NULL)
strcpy (cmd, last_slash + 1);
int len = strlen (cmd);
if (len > 4)
{
char *s = cmd + len - 4;
if (strcasecmp (s, ".exe") == 0)
*s = 0;
}
}
/*
* Note: under Windows, a _process_ is always running - it's only _threads_
* that get suspended. Therefore the default state is R (runnable).
*/
if (p->process_state & PID_ZOMBIE)
state = 'Z';
else if (p->process_state & PID_STOPPED)
state = 'T';
else if (wincap.is_winnt ())
state = get_process_state (p->dwProcessId);
switch (state)
{
case 'O':
state_str = "running";
break;
case 'D':
case 'S':
state_str = "sleeping";
break;
case 'R':
state_str = "runnable";
break;
case 'Z':
state_str = "zombie";
break;
case 'T':
state_str = "stopped";
break;
}
if (wincap.is_winnt ())
{
if (!get_mem_values (p->dwProcessId, &vmsize, &vmrss, &vmtext, &vmdata, &vmlib, &vmshare))
return 0;
unsigned page_size = getpagesize ();
vmsize *= page_size; vmrss *= page_size; vmdata *= page_size;
vmtext *= page_size; vmlib *= page_size;
}
// The real uid value for *this* process is stored at cygheap->user.real_uid
// but we can't get at the real uid value for any other process, so
// just fake it as p->uid. Similar for p->gid.
return __small_sprintf (destbuf, "Name: %s\n"
"State: %c (%s)\n"
"Tgid: %d\n"
"Pid: %d\n"
"PPid: %d\n"
"Uid: %d %d %d %d\n"
"Gid: %d %d %d %d\n"
"VmSize: %8d kB\n"
"VmLck: %8d kB\n"
"VmRSS: %8d kB\n"
"VmData: %8d kB\n"
"VmStk: %8d kB\n"
"VmExe: %8d kB\n"
"VmLib: %8d kB\n"
"SigPnd: %016x\n"
"SigBlk: %016x\n"
"SigIgn: %016x\n",
cmd,
state, state_str,
p->pgid,
p->pid,
p->ppid,
p->uid, p->uid, p->uid, p->uid,
p->gid, p->gid, p->gid, p->gid,
vmsize >> 10, 0, vmrss >> 10, vmdata >> 10, 0, vmtext >> 10, vmlib >> 10,
0, 0, p->getsigmask ()
);
}
static _off64_t
format_process_statm (_pinfo *p, char *destbuf, size_t maxsize)
{
unsigned long vmsize = 0UL, vmrss = 0UL, vmtext = 0UL, vmdata = 0UL,
vmlib = 0UL, vmshare = 0UL;
if (wincap.is_winnt ())
{
if (!get_mem_values (p->dwProcessId, &vmsize, &vmrss, &vmtext, &vmdata,
&vmlib, &vmshare))
return 0;
}
return __small_sprintf (destbuf, "%ld %ld %ld %ld %ld %ld %ld",
vmsize, vmrss, vmshare, vmtext, vmlib, vmdata, 0
);
}
static int
get_process_state (DWORD dwProcessId)
{
/*
* This isn't really heavy magic - just go through the processes'
* threads one by one and return a value accordingly
* Errors are silently ignored.
*/
NTSTATUS ret;
SYSTEM_PROCESSES *sp;
ULONG n = 0x1000;
PULONG p = new ULONG[n];
int state =' ';
while (STATUS_INFO_LENGTH_MISMATCH ==
(ret = NtQuerySystemInformation (SystemProcessesAndThreadsInformation,
(PVOID) p,
n * sizeof *p, NULL)))
delete [] p, p = new ULONG[n *= 2];
if (ret != STATUS_SUCCESS)
{
debug_printf ("NtQuerySystemInformation: ret = %d, "
"Dos(ret) = %d",
ret, RtlNtStatusToDosError (ret));
goto out;
}
state = 'Z';
sp = (SYSTEM_PROCESSES *) p;
for (;;)
{
if (sp->ProcessId == dwProcessId)
{
SYSTEM_THREADS *st;
if (wincap.has_process_io_counters ())
/*
* Windows 2000 and XP have an extra member in SYSTEM_PROCESSES
* which means the offset of the first SYSTEM_THREADS entry is
* different on these operating systems compared to NT 4.
*/
st = &sp->Threads[0];
else
/*
* 136 is the offset of the first SYSTEM_THREADS entry on
* Windows NT 4.
*/
st = (SYSTEM_THREADS *) ((char *) sp + 136);
state = 'S';
for (unsigned i = 0; i < sp->ThreadCount; i++)
{
if (st->State == StateRunning ||
st->State == StateReady)
{
state = 'R';
goto out;
}
st++;
}
break;
}
if (!sp->NextEntryDelta)
break;
sp = (SYSTEM_PROCESSES *) ((char *) sp + sp->NextEntryDelta);
}
out:
delete [] p;
return state;
}
static bool
get_mem_values (DWORD dwProcessId, unsigned long *vmsize, unsigned long *vmrss,
unsigned long *vmtext, unsigned long *vmdata,
unsigned long *vmlib, unsigned long *vmshare)
{
bool res = true;
NTSTATUS ret;
HANDLE hProcess;
VM_COUNTERS vmc;
MEMORY_WORKING_SET_LIST *mwsl;
ULONG n = 0x1000, length;
PULONG p = new ULONG[n];
unsigned page_size = getpagesize ();
hProcess = OpenProcess (PROCESS_QUERY_INFORMATION,
FALSE, dwProcessId);
if (hProcess == NULL)
{
DWORD error = GetLastError ();
__seterrno_from_win_error (error);
debug_printf ("OpenProcess: ret = %d",
error);
return false;
}
while ((ret = NtQueryVirtualMemory (hProcess, 0,
MemoryWorkingSetList,
(PVOID) p,
n * sizeof *p, &length)),
(ret == STATUS_SUCCESS || ret == STATUS_INFO_LENGTH_MISMATCH) &&
length >= n * sizeof *p)
delete [] p, p = new ULONG[n *= 2];
if (ret != STATUS_SUCCESS)
{
debug_printf ("NtQueryVirtualMemory: ret = %d, "
"Dos(ret) = %d",
ret, RtlNtStatusToDosError (ret));
res = false;
goto out;
}
mwsl = (MEMORY_WORKING_SET_LIST *) p;
for (unsigned long i = 0; i < mwsl->NumberOfPages; i++)
{
++*vmrss;
unsigned flags = mwsl->WorkingSetList[i] & 0x0FFF;
if (flags & (WSLE_PAGE_EXECUTE | WSLE_PAGE_SHAREABLE) == (WSLE_PAGE_EXECUTE | WSLE_PAGE_SHAREABLE))
++*vmlib;
else if (flags & WSLE_PAGE_SHAREABLE)
++*vmshare;
else if (flags & WSLE_PAGE_EXECUTE)
++*vmtext;
else
++*vmdata;
}
ret = NtQueryInformationProcess (hProcess,
ProcessVmCounters,
(PVOID) &vmc,
sizeof vmc, NULL);
if (ret != STATUS_SUCCESS)
{
debug_printf ("NtQueryInformationProcess: ret = %d, "
"Dos(ret) = %d",
ret, RtlNtStatusToDosError (ret));
res = false;
goto out;
}
*vmsize = vmc.PagefileUsage / page_size;
out:
delete [] p;
CloseHandle (hProcess);
return res;
}
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