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