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libc/winsup/utils/ps.cc

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/* ps.cc
Copyright 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006,
2007, 2008, 2009, 2010, 2011, 2012, 2015 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 <errno.h>
#include <stdio.h>
#include <locale.h>
#include <wchar.h>
#include <windows.h>
#include <time.h>
#include <getopt.h>
#include <unistd.h>
#include <stdlib.h>
#include <pwd.h>
#include <limits.h>
#include <sys/cygwin.h>
#include <cygwin/version.h>
#include <psapi.h>
#include <ntdef.h>
#include <ntdll.h>
#include "loadlib.h"
/* Maximum possible path length under NT. There's no official define
for that value. Note that PATH_MAX is only 4K. */
#define NT_MAX_PATH 32768
static char *prog_name;
static struct option longopts[] =
{
{"all", no_argument, NULL, 'a' },
{"everyone", no_argument, NULL, 'e' },
{"full", no_argument, NULL, 'f' },
{"help", no_argument, NULL, 'h' },
{"long", no_argument, NULL, 'l' },
{"process", required_argument, NULL, 'p'},
{"summary", no_argument, NULL, 's' },
{"user", required_argument, NULL, 'u'},
{"version", no_argument, NULL, 'V'},
{"windows", no_argument, NULL, 'W'},
{NULL, 0, NULL, 0}
};
static char opts[] = "aefhlp:su:VW";
static char *
start_time (external_pinfo *child)
{
time_t st = child->start_time;
time_t t = time (NULL);
static char stime[40] = {'\0'};
char now[40];
strncpy (stime, ctime (&st) + 4, 15);
strcpy (now, ctime (&t) + 4);
if ((t - st) < (24 * 3600))
return (stime + 7);
stime[6] = '\0';
return stime;
}
#define FACTOR (0x19db1ded53ea710LL)
#define NSPERSEC 10000000LL
/* Convert a Win32 time to "UNIX" format. */
long __stdcall
to_time_t (FILETIME *ptr)
{
/* A file time is the number of 100ns since jan 1 1601
stuffed into two long words.
A time_t is the number of seconds since jan 1 1970. */
long rem;
long long x = ((long long) ptr->dwHighDateTime << 32) + ((unsigned)ptr->dwLowDateTime);
x -= FACTOR; /* number of 100ns between 1601 and 1970 */
rem = x % ((long long)NSPERSEC);
rem += (NSPERSEC / 2);
x /= (long long) NSPERSEC; /* number of 100ns in a second */
x += (long long) (rem / NSPERSEC);
return x;
}
static const char *
ttynam (int ntty)
{
static char buf[9];
char buf0[9];
if (ntty < 0)
strcpy (buf0, "?");
else if (ntty & 0xffff0000)
sprintf (buf0, "cons%d", ntty & 0xff);
else
sprintf (buf0, "pty%d", ntty);
sprintf (buf, " %-7s", buf0);
return buf;
}
static void
usage (FILE * stream, int status)
{
fprintf (stream, "\
Usage: %1$s [-aefls] [-u UID] [-p PID]\n\
\n\
Report process status\n\
\n\
-a, --all show processes of all users\n\
-e, --everyone show processes of all users\n\
-f, --full show process uids, ppids\n\
-h, --help output usage information and exit\n\
-l, --long show process uids, ppids, pgids, winpids\n\
-p, --process show information for specified PID\n\
-s, --summary show process summary\n\
-u, --user list processes owned by UID\n\
-V, --version output version information and exit\n\
-W, --windows show windows as well as cygwin processes\n\
\n\
With no options, %1$s outputs the long format by default\n\n",
prog_name);
exit (status);
}
static void
print_version ()
{
printf ("ps (cygwin) %d.%d.%d\n"
"Show process statistics\n"
"Copyright (C) 1996 - %s Red Hat, Inc.\n"
"This is free software; see the source for copying conditions. There is NO\n"
"warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.\n",
CYGWIN_VERSION_DLL_MAJOR / 1000,
CYGWIN_VERSION_DLL_MAJOR % 1000,
CYGWIN_VERSION_DLL_MINOR,
strrchr (__DATE__, ' ') + 1);
}
char unicode_buf[sizeof (UNICODE_STRING) + NT_MAX_PATH];
int
main (int argc, char *argv[])
{
external_pinfo *p;
int aflag, lflag, fflag, sflag, proc_id;
uid_t uid;
bool found_proc_id = true;
DWORD proc_access = PROCESS_QUERY_LIMITED_INFORMATION;
cygwin_getinfo_types query = CW_GETPINFO;
const char *dtitle = " PID TTY STIME COMMAND\n";
const char *dfmt = "%7d%4s%10s %s\n";
const char *ftitle = " UID PID PPID TTY STIME COMMAND\n";
const char *ffmt = "%8.8s%8d%8d%4s%10s %s\n";
const char *ltitle = " PID PPID PGID WINPID TTY UID STIME COMMAND\n";
const char *lfmt = "%c %7d %7d %7d %10u %4s %8u %8s %s\n";
char ch;
PUNICODE_STRING uni = (PUNICODE_STRING) unicode_buf;
void *drive_map = NULL;
aflag = lflag = fflag = sflag = 0;
uid = getuid ();
proc_id = -1;
lflag = 1;
setlocale (LC_ALL, "");
prog_name = program_invocation_short_name;
while ((ch = getopt_long (argc, argv, opts, longopts, NULL)) != EOF)
switch (ch)
{
case 'a':
case 'e':
aflag = 1;
break;
case 'f':
fflag = 1;
break;
case 'h':
usage (stdout, 0);
case 'l':
lflag = 1;
break;
case 'p':
proc_id = atoi (optarg);
aflag = 1;
found_proc_id = false;
break;
case 's':
sflag = 1;
break;
case 'u':
uid = atoi (optarg);
if (uid == 0)
{
struct passwd *pw;
if ((pw = getpwnam (optarg)))
uid = pw->pw_uid;
else
{
fprintf (stderr, "%s: user %s unknown\n", prog_name, optarg);
exit (1);
}
}
break;
case 'V':
print_version ();
exit (0);
break;
case 'W':
query = CW_GETPINFO_FULL;
aflag = 1;
break;
default:
fprintf (stderr, "Try `%s --help' for more information.\n", prog_name);
exit (1);
}
if (sflag)
printf (dtitle);
else if (fflag)
printf (ftitle);
else if (lflag)
printf (ltitle);
(void) cygwin_internal (CW_LOCK_PINFO, 1000);
if (query == CW_GETPINFO_FULL)
{
/* Enable debug privilege to allow to enumerate all processes,
not only processes in current session. */
HANDLE tok;
if (OpenProcessToken (GetCurrentProcess (),
TOKEN_QUERY | TOKEN_ADJUST_PRIVILEGES,
&tok))
{
TOKEN_PRIVILEGES priv;
priv.PrivilegeCount = 1;
if (LookupPrivilegeValue (NULL, SE_DEBUG_NAME,
&priv.Privileges[0].Luid))
{
priv.Privileges[0].Attributes = SE_PRIVILEGE_ENABLED;
AdjustTokenPrivileges (tok, FALSE, &priv, 0, NULL, NULL);
}
}
/* Check process query capabilities. */
OSVERSIONINFO version;
version.dwOSVersionInfoSize = sizeof version;
GetVersionEx (&version);
if (version.dwMajorVersion <= 5) /* pre-Vista */
proc_access = PROCESS_QUERY_INFORMATION;
drive_map = (void *) cygwin_internal (CW_ALLOC_DRIVE_MAP);
/* Check old Cygwin version. */
if (drive_map == (void *) -1)
drive_map = NULL;
/* Allow fallback to GetModuleFileNameEx. */
if (!drive_map)
proc_access = PROCESS_QUERY_INFORMATION | PROCESS_VM_READ;
}
for (int pid = 0;
(p = (external_pinfo *) cygwin_internal (query, pid | CW_NEXTPID));
pid = p->pid)
{
if ((proc_id > 0) && (p->pid != proc_id))
continue;
else
found_proc_id = true;
if (aflag)
/* nothing to do */;
else if (p->version >= EXTERNAL_PINFO_VERSION_32_BIT)
{
if (p->uid32 != uid)
continue;
}
else if (p->uid != uid)
continue;
char status = ' ';
if (p->process_state & PID_STOPPED)
status = 'S';
else if (p->process_state & PID_TTYIN)
status = 'I';
else if (p->process_state & PID_TTYOU)
status = 'O';
/* Maximum possible path length under NT. There's no official define
for that value. */
char pname[NT_MAX_PATH + sizeof (" <defunct>")];
if (p->ppid)
{
char *s;
pname[0] = '\0';
strncat (pname, p->progname_long, NT_MAX_PATH);
s = strchr (pname, '\0') - 4;
if (s > pname && strcasecmp (s, ".exe") == 0)
*s = '\0';
if (p->process_state & PID_EXITED || (p->exitcode & ~0xffff))
strcat (pname, " <defunct>");
}
else if (query == CW_GETPINFO_FULL)
{
HANDLE h;
NTSTATUS status;
wchar_t *win32path = NULL;
h = OpenProcess (proc_access, FALSE, p->dwProcessId);
if (!h)
continue;
/* We use NtQueryInformationProcess in the first place, because
GetModuleFileNameEx does not work under WOW64 when trying
to fetch module names of 64 bit processes. */
if (!(proc_access & PROCESS_VM_READ))
{
status = NtQueryInformationProcess (h, ProcessImageFileName, uni,
sizeof unicode_buf, NULL);
if (NT_SUCCESS (status))
{
/* NtQueryInformationProcess returns a native NT device path.
Call CW_MAP_DRIVE_MAP to convert the path to an ordinary
Win32 path. The returned pointer is a pointer into the
incoming buffer given as third argument. It's expected
to be big enough, which we made sure by defining
unicode_buf to have enough space for a maximum sized
UNICODE_STRING. */
if (uni->Length == 0) /* System process */
win32path = (wchar_t *) L"System";
else
{
uni->Buffer[uni->Length / sizeof (WCHAR)] = L'\0';
win32path = (wchar_t *) cygwin_internal (CW_MAP_DRIVE_MAP,
drive_map,
uni->Buffer);
}
}
}
else if (GetModuleFileNameExW (h, NULL, (PWCHAR) unicode_buf,
NT_MAX_PATH))
win32path = (wchar_t *) unicode_buf;
if (win32path)
wcstombs (pname, win32path, sizeof pname);
else
strcpy (pname, "*** unknown ***");
FILETIME ct, et, kt, ut;
if (GetProcessTimes (h, &ct, &et, &kt, &ut))
p->start_time = to_time_t (&ct);
CloseHandle (h);
}
char uname[128];
if (fflag)
{
struct passwd *pw;
if ((pw = getpwuid (p->version >= EXTERNAL_PINFO_VERSION_32_BIT ?
p->uid32 : p->uid)))
strcpy (uname, pw->pw_name);
else
sprintf (uname, "%u", (unsigned)
(p->version >= EXTERNAL_PINFO_VERSION_32_BIT ?
p->uid32 : p->uid));
}
if (sflag)
printf (dfmt, p->pid, ttynam (p->ctty), start_time (p), pname);
else if (fflag)
printf (ffmt, uname, p->pid, p->ppid, ttynam (p->ctty), start_time (p),
pname);
else if (lflag)
printf (lfmt, status, p->pid, p->ppid, p->pgid,
p->dwProcessId, ttynam (p->ctty),
p->version >= EXTERNAL_PINFO_VERSION_32_BIT ? p->uid32 : p->uid,
start_time (p), pname);
}
if (drive_map)
cygwin_internal (CW_FREE_DRIVE_MAP, drive_map);
(void) cygwin_internal (CW_UNLOCK_PINFO);
return found_proc_id ? 0 : 1;
}
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