752 lines
18 KiB
C++
752 lines
18 KiB
C++
/* fhandler_process.cc: fhandler for /proc/<pid> virtual filesystem
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Copyright 2002, 2003 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 "winsup.h"
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#include <errno.h>
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#include <unistd.h>
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#include <stdlib.h>
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#include <sys/cygwin.h>
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#include <ntdef.h>
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#include "cygerrno.h"
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#include "security.h"
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#include "fhandler.h"
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#include "pinfo.h"
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#include "path.h"
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#include "shared_info.h"
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#include "dtable.h"
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#include "cygheap.h"
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#include "ntdll.h"
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#include <sys/param.h>
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#include <assert.h>
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#include <sys/sysmacros.h>
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#define _COMPILING_NEWLIB
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#include <dirent.h>
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static const int PROCESS_PPID = 2;
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static const int PROCESS_EXENAME = 3;
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static const int PROCESS_WINPID = 4;
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static const int PROCESS_WINEXENAME = 5;
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static const int PROCESS_STATUS = 6;
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static const int PROCESS_UID = 7;
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static const int PROCESS_GID = 8;
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static const int PROCESS_PGID = 9;
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static const int PROCESS_SID = 10;
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static const int PROCESS_CTTY = 11;
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static const int PROCESS_STAT = 12;
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static const int PROCESS_STATM = 13;
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static const int PROCESS_CMDLINE = 14;
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static const char * const process_listing[] =
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{
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".",
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"..",
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"ppid",
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"exename",
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"winpid",
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"winexename",
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"status",
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"uid",
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"gid",
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"pgid",
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"sid",
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"ctty",
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"stat",
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"statm",
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"cmdline",
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NULL
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};
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static const int PROCESS_LINK_COUNT =
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(sizeof (process_listing) / sizeof (const char *)) - 1;
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static off_t format_process_stat (_pinfo *p, char *destbuf, size_t maxsize);
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static off_t format_process_status (_pinfo *p, char *destbuf, size_t maxsize);
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static off_t format_process_statm (_pinfo *p, char *destbuf, size_t maxsize);
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static int get_process_state (DWORD dwProcessId);
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static bool get_mem_values (DWORD dwProcessId, unsigned long *vmsize,
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unsigned long *vmrss, unsigned long *vmtext,
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unsigned long *vmdata, unsigned long *vmlib,
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unsigned long *vmshare);
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/* Returns 0 if path doesn't exist, >0 if path is a directory,
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* <0 if path is a file.
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*/
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int
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fhandler_process::exists ()
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{
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const char *path = get_name ();
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debug_printf ("exists (%s)", path);
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path += proc_len + 1;
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while (*path != 0 && !isdirsep (*path))
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path++;
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if (*path == 0)
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return 2;
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for (int i = 0; process_listing[i]; i++)
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if (pathmatch (path + 1, process_listing[i]))
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return -1;
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return 0;
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}
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fhandler_process::fhandler_process ():
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fhandler_proc (FH_PROCESS)
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{
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}
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int
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fhandler_process::fstat (struct __stat64 *buf, path_conv *pc)
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{
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const char *path = get_name ();
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int file_type = exists ();
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(void) fhandler_base::fstat (buf, pc);
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path += proc_len + 1;
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pid = atoi (path);
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pinfo p (pid);
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if (!p)
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{
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set_errno (ENOENT);
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return -1;
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}
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buf->st_mode &= ~_IFMT & NO_W;
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switch (file_type)
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{
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case 0:
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set_errno (ENOENT);
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return -1;
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case 1:
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buf->st_mode |= S_IFDIR | S_IXUSR | S_IXGRP | S_IXOTH;
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return 0;
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case 2:
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buf->st_ctime = buf->st_mtime = p->start_time;
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buf->st_ctim.tv_nsec = buf->st_mtim.tv_nsec = 0;
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time_as_timestruc_t (&buf->st_atim);
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buf->st_uid = p->uid;
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buf->st_gid = p->gid;
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buf->st_mode |= S_IFDIR | S_IXUSR | S_IXGRP | S_IXOTH;
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buf->st_nlink = PROCESS_LINK_COUNT;
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return 0;
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default:
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case -1:
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buf->st_uid = p->uid;
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buf->st_gid = p->gid;
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buf->st_mode |= S_IFREG | S_IRUSR | S_IRGRP | S_IROTH;
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return 0;
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}
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}
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struct dirent *
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fhandler_process::readdir (DIR * dir)
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{
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if (dir->__d_position >= PROCESS_LINK_COUNT)
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{
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set_errno (ENMFILE);
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return NULL;
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}
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strcpy (dir->__d_dirent->d_name, process_listing[dir->__d_position++]);
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syscall_printf ("%p = readdir (%p) (%s)", &dir->__d_dirent, dir,
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dir->__d_dirent->d_name);
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return dir->__d_dirent;
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}
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int
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fhandler_process::open (path_conv *pc, int flags, mode_t mode)
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{
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int process_file_no = -1;
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int res = fhandler_virtual::open (pc, flags, mode);
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if (!res)
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goto out;
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set_nohandle (true);
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const char *path;
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path = get_name () + proc_len + 1;
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pid = atoi (path);
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while (*path != 0 && !isdirsep (*path))
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path++;
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if (*path == 0)
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{
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if ((flags & (O_CREAT | O_EXCL)) == (O_CREAT | O_EXCL))
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{
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set_errno (EEXIST);
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res = 0;
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goto out;
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}
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else if (flags & O_WRONLY)
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{
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set_errno (EISDIR);
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res = 0;
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goto out;
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}
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else
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{
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flags |= O_DIROPEN;
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goto success;
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}
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}
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process_file_no = -1;
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for (int i = 0; process_listing[i]; i++)
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{
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if (path_prefix_p
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(process_listing[i], path + 1, strlen (process_listing[i])))
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process_file_no = i;
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}
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if (process_file_no == -1)
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{
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if (flags & O_CREAT)
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{
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set_errno (EROFS);
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res = 0;
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goto out;
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}
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else
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{
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set_errno (ENOENT);
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res = 0;
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goto out;
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}
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}
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if (flags & O_WRONLY)
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{
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set_errno (EROFS);
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res = 0;
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goto out;
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}
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fileid = process_file_no;
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if (!fill_filebuf ())
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{
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res = 0;
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goto out;
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}
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if (flags & O_APPEND)
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position = filesize;
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else
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position = 0;
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success:
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res = 1;
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set_flags ((flags & ~O_TEXT) | O_BINARY);
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set_open_status ();
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out:
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syscall_printf ("%d = fhandler_proc::open (%p, %d)", res, flags, mode);
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return res;
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}
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bool
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fhandler_process::fill_filebuf ()
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{
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pinfo p (pid);
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if (!p)
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{
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set_errno (ENOENT);
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return false;
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}
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switch (fileid)
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{
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case PROCESS_UID:
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case PROCESS_GID:
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case PROCESS_PGID:
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case PROCESS_SID:
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case PROCESS_CTTY:
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case PROCESS_PPID:
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{
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filebuf = (char *) realloc (filebuf, bufalloc = 40);
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int num;
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switch (fileid)
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{
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case PROCESS_PPID:
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num = p->ppid;
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break;
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case PROCESS_UID:
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num = p->uid;
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break;
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case PROCESS_PGID:
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num = p->pgid;
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break;
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case PROCESS_SID:
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num = p->sid;
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break;
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case PROCESS_GID:
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num = p->gid;
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break;
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case PROCESS_CTTY:
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num = p->ctty;
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break;
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default: // what's this here for?
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num = 0;
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break;
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}
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__small_sprintf (filebuf, "%d\n", num);
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filesize = strlen (filebuf);
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break;
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}
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case PROCESS_CMDLINE:
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{
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if (filebuf)
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free (filebuf);
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filebuf = p->cmdline (filesize);
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if (!filebuf || !*filebuf)
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filebuf = strdup ("<defunct>");
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break;
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}
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case PROCESS_EXENAME:
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{
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filebuf = (char *) realloc (filebuf, bufalloc = MAX_PATH);
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if (p->process_state & (PID_ZOMBIE | PID_EXITED))
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strcpy (filebuf, "<defunct>");
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else
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{
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mount_table->conv_to_posix_path (p->progname, filebuf, 1);
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int len = strlen (filebuf);
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if (len > 4)
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{
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char *s = filebuf + len - 4;
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if (strcasecmp (s, ".exe") == 0)
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*s = 0;
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}
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}
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filesize = strlen (filebuf);
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break;
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}
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case PROCESS_WINPID:
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{
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filebuf = (char *) realloc (filebuf, bufalloc = 40);
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__small_sprintf (filebuf, "%d\n", p->dwProcessId);
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filesize = strlen (filebuf);
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break;
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}
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case PROCESS_WINEXENAME:
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{
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int len = strlen (p->progname);
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filebuf = (char *) realloc (filebuf, bufalloc = (len + 2));
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strcpy (filebuf, p->progname);
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filebuf[len] = '\n';
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filesize = len + 1;
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break;
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}
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case PROCESS_STATUS:
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{
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filebuf = (char *) realloc (filebuf, bufalloc = 2048);
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filesize = format_process_status (*p, filebuf, bufalloc);
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break;
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}
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case PROCESS_STAT:
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{
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filebuf = (char *) realloc (filebuf, bufalloc = 2048);
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filesize = format_process_stat (*p, filebuf, bufalloc);
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break;
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}
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case PROCESS_STATM:
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{
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filebuf = (char *) realloc (filebuf, bufalloc = 2048);
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filesize = format_process_statm (*p, filebuf, bufalloc);
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break;
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}
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}
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return true;
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}
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static
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off_t
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format_process_stat (_pinfo *p, char *destbuf, size_t maxsize)
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{
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char cmd[MAX_PATH];
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int state = 'R';
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unsigned long fault_count = 0UL,
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utime = 0UL, stime = 0UL,
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start_time = 0UL,
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vmsize = 0UL, vmrss = 0UL, vmmaxrss = 0UL;
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int priority = 0;
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if (p->process_state & (PID_ZOMBIE | PID_EXITED))
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strcpy (cmd, "<defunct>");
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else
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{
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strcpy (cmd, p->progname);
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char *last_slash = strrchr (cmd, '\\');
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if (last_slash != NULL)
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strcpy (cmd, last_slash + 1);
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int len = strlen (cmd);
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if (len > 4)
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{
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char *s = cmd + len - 4;
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if (strcasecmp (s, ".exe") == 0)
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*s = 0;
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}
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}
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/*
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* Note: under Windows, a _process_ is always running - it's only _threads_
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* that get suspended. Therefore the default state is R (runnable).
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*/
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if (p->process_state & PID_ZOMBIE)
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state = 'Z';
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else if (p->process_state & PID_STOPPED)
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state = 'T';
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else if (wincap.is_winnt ())
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state = get_process_state (p->dwProcessId);
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if (wincap.is_winnt ())
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{
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NTSTATUS ret;
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HANDLE hProcess;
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VM_COUNTERS vmc;
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KERNEL_USER_TIMES put;
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PROCESS_BASIC_INFORMATION pbi;
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QUOTA_LIMITS ql;
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SYSTEM_TIME_OF_DAY_INFORMATION stodi;
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SYSTEM_PROCESSOR_TIMES spt;
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hProcess = OpenProcess (PROCESS_VM_READ | PROCESS_QUERY_INFORMATION,
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FALSE, p->dwProcessId);
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if (hProcess != NULL)
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{
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ret = NtQueryInformationProcess (hProcess,
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ProcessVmCounters,
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(PVOID) &vmc,
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sizeof vmc, NULL);
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if (ret == STATUS_SUCCESS)
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ret = NtQueryInformationProcess (hProcess,
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ProcessTimes,
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(PVOID) &put,
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sizeof put, NULL);
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if (ret == STATUS_SUCCESS)
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ret = NtQueryInformationProcess (hProcess,
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ProcessBasicInformation,
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(PVOID) &pbi,
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sizeof pbi, NULL);
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if (ret == STATUS_SUCCESS)
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ret = NtQueryInformationProcess (hProcess,
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ProcessQuotaLimits,
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(PVOID) &ql,
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sizeof ql, NULL);
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CloseHandle (hProcess);
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}
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else
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{
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DWORD error = GetLastError ();
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__seterrno_from_win_error (error);
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debug_printf ("OpenProcess: ret = %d",
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error);
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return 0;
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}
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if (ret == STATUS_SUCCESS)
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ret = NtQuerySystemInformation (SystemTimeOfDayInformation,
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(PVOID) &stodi,
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sizeof stodi, NULL);
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if (ret == STATUS_SUCCESS)
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ret = NtQuerySystemInformation (SystemProcessorTimes,
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(PVOID) &spt,
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sizeof spt, NULL);
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if (ret != STATUS_SUCCESS)
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{
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__seterrno_from_win_error (RtlNtStatusToDosError (ret));
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debug_printf ("NtQueryInformationProcess: ret = %d, "
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"Dos(ret) = %d",
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ret, RtlNtStatusToDosError (ret));
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return 0;
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}
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fault_count = vmc.PageFaultCount;
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utime = put.UserTime.QuadPart * HZ / 10000000ULL;
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stime = put.KernelTime.QuadPart * HZ / 10000000ULL;
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if (stodi.CurrentTime.QuadPart > put.CreateTime.QuadPart)
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start_time = (spt.KernelTime.QuadPart + spt.UserTime.QuadPart -
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stodi.CurrentTime.QuadPart + put.CreateTime.QuadPart) * HZ / 10000000ULL;
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else
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/*
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* sometimes stodi.CurrentTime is a bit behind
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* Note: some older versions of procps are broken and can't cope
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* with process start times > time(NULL).
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*/
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start_time = (spt.KernelTime.QuadPart + spt.UserTime.QuadPart) * HZ / 10000000ULL;
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priority = pbi.BasePriority;
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unsigned page_size = getpagesize ();
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vmsize = vmc.VirtualSize;
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vmrss = vmc.WorkingSetSize / page_size;
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vmmaxrss = ql.MaximumWorkingSetSize / page_size;
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}
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else
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{
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start_time = (GetTickCount () / 1000 - time (NULL) + p->start_time) * HZ;
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}
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return __small_sprintf (destbuf, "%d (%s) %c "
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"%d %d %d %d %d "
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"%lu %lu %lu %lu %lu %lu %lu "
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"%ld %ld %ld %ld %ld %ld "
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"%lu %lu "
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"%ld "
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"%lu",
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p->pid, cmd,
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state,
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p->ppid, p->pgid, p->sid, makedev (FH_TTYS, p->ctty),
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-1, 0, fault_count, fault_count, 0, 0, utime, stime,
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utime, stime, priority, 0, 0, 0,
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start_time, vmsize,
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vmrss, vmmaxrss
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);
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}
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static
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off_t
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format_process_status (_pinfo *p, char *destbuf, size_t maxsize)
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{
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char cmd[MAX_PATH];
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int state = 'R';
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const char *state_str = "unknown";
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unsigned long vmsize = 0UL, vmrss = 0UL, vmdata = 0UL, vmlib = 0UL, vmtext = 0UL,
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vmshare = 0UL;
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if (p->process_state & (PID_ZOMBIE | PID_EXITED))
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strcpy (cmd, "<defunct>");
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else
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{
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strcpy (cmd, p->progname);
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char *last_slash = strrchr (cmd, '\\');
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if (last_slash != NULL)
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strcpy (cmd, last_slash + 1);
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int len = strlen (cmd);
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if (len > 4)
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{
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char *s = cmd + len - 4;
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if (strcasecmp (s, ".exe") == 0)
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*s = 0;
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}
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}
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/*
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* Note: under Windows, a _process_ is always running - it's only _threads_
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* that get suspended. Therefore the default state is R (runnable).
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*/
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if (p->process_state & PID_ZOMBIE)
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state = 'Z';
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else if (p->process_state & PID_STOPPED)
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state = 'T';
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else if (wincap.is_winnt ())
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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
|
|
off_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.VirtualSize / page_size;
|
|
out:
|
|
delete [] p;
|
|
CloseHandle (hProcess);
|
|
return res;
|
|
}
|