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libc/winsup/utils/ps.cc

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/* ps.cc
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 Cygwin Authors\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);
}
}
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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