add new files

1 files changed, 294 insertions, 0 deletions

diff --git a/winsup/cygwin/fhandler_process.cc b/winsup/cygwin/fhandler_process.cc
new file mode 100644
index 000000000..32812c5b8
--- /dev/null
+++ b/winsup/cygwin/fhandler_process.cc
@@ -0,0 +1,294 @@
+/* fhandler_process.cc: fhandler for /proc/<pid> virtual filesystem
+
+   Copyright 2002 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 <sys/fcntl.h>
+#include <errno.h>
+#include <unistd.h>
+#include <stdlib.h>
+#include <sys/cygwin.h>
+#include "cygerrno.h"
+#include "security.h"
+#include "fhandler.h"
+#include "sigproc.h"
+#include "pinfo.h"
+#include "path.h"
+#include "shared_info.h"
+#include <assert.h>
+
+#define _COMPILING_NEWLIB
+#include <dirent.h>
+
+static const int PROCESS_PPID = 0;
+static const int PROCESS_EXENAME = 1;
+static const int PROCESS_WINPID = 2;
+static const int PROCESS_WINEXENAME = 3;
+static const int PROCESS_STATUS = 4;
+static const int PROCESS_UID = 5;
+static const int PROCESS_GID = 6;
+static const int PROCESS_PGID = 7;
+static const int PROCESS_SID = 8;
+static const int PROCESS_CTTY = 9;
+
+static const char *process_listing[] = {
+  "ppid",
+  "exename",
+  "winpid",
+  "winexename",
+  "status",
+  "uid",
+  "gid",
+  "pgid",
+  "sid",
+  "ctty",
+  NULL
+};
+
+static const int PROCESS_LINK_COUNT = (sizeof(process_listing) / sizeof(const char *)) - 1;
+
+/* 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)
+{
+  debug_printf ("exists (%s)", path);
+  path += proc_len + 1;
+  while (*path != 0 && !SLASH_P (*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 1;
+}
+
+fhandler_process::fhandler_process ():
+  fhandler_proc (FH_PROCESS)
+{
+}
+
+int
+fhandler_process::fstat (struct __stat64 *buf, path_conv *path)
+{
+  int file_type = exists ((const char *) get_name ());
+  switch (file_type)
+    {
+    case 0:
+      set_errno (ENOENT);
+      return -1;
+    case 1:
+      buf->st_mode = S_IFDIR | 0555;
+      buf->st_nlink = 1;
+      return 0;
+    case 2:
+      buf->st_mode = S_IFDIR | 0555;
+      buf->st_nlink = PROCESS_LINK_COUNT;
+      return 0;
+    default:
+    case -1:
+      buf->st_mode = S_IFREG | 0444;
+      buf->st_nlink = 1;
+      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, pid;
+  winpids pids;
+  _pinfo *p;
+
+  int res = fhandler_virtual::open (pc, flags, mode);
+  if (!res)
+    goto out;
+
+  const char *path;
+  path = (const char *) *pc + proc_len + 1;
+  pid = atoi (path);
+  while (*path != 0 && !SLASH_P (*path))
+    path++;
+
+  if (*path == 0)
+    {
+      if ((mode & (O_CREAT | O_EXCL)) == (O_CREAT | O_EXCL))
+        {
+          set_errno (EEXIST);
+          res = 0;
+          goto out;
+        }
+      else if (mode & 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 ((mode & (O_CREAT | O_EXCL)) == (O_CREAT | O_EXCL))
+        {
+          set_errno (EROFS);
+          res = 0;
+          goto out;
+        }
+      else
+        {
+          set_errno (ENOENT);
+          res = 0;
+          goto out;
+        }
+    }
+  if (mode & O_WRONLY)
+    {
+      set_errno (EROFS);
+      res = 0;
+      goto out;
+    }
+  for (unsigned i = 0; i < pids.npids; i++)
+    {
+      p = pids[i];
+
+      if (!proc_exists (p))
+        continue;
+
+      if (p->pid == pid)
+        goto found;
+    }
+  set_errno (ENOENT);
+  res = 0;
+  goto out;
+found:
+  switch (process_file_no)
+    {
+    case PROCESS_UID:
+    case PROCESS_GID:
+    case PROCESS_PGID:
+    case PROCESS_SID:
+    case PROCESS_CTTY:
+    case PROCESS_PPID:
+      {
+        filebuf = new char[bufalloc = 40];
+        int num;
+        switch (process_file_no)
+          {
+          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;
+	  default:
+          case PROCESS_CTTY:
+            num = p->ctty;
+            break;
+          }
+        __small_sprintf (filebuf, "%d\n", num);
+        filesize = strlen (filebuf);
+        break;
+      }
+    case PROCESS_EXENAME:
+      {
+        filebuf = new char[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 = new char[bufalloc = 40];
+        __small_sprintf (filebuf, "%d\n", p->dwProcessId);
+        filesize = strlen (filebuf);
+        break;
+      }
+    case PROCESS_WINEXENAME:
+      {
+        int len = strlen (p->progname);
+        filebuf = new char[len + 2];
+        strcpy (filebuf, p->progname);
+        filebuf[len] = '\n';
+        filesize = len + 1;
+        break;
+      }
+    case PROCESS_STATUS:
+      {
+        filebuf = new char[bufalloc = 3];
+        filebuf[0] = ' ';
+        filebuf[1] = '\n';
+        filebuf[2] = 0;
+        if (p->process_state & PID_STOPPED)
+          filebuf[0] = 'S';
+        else if (p->process_state & PID_TTYIN)
+          filebuf[0] = 'I';
+        else if (p->process_state & PID_TTYOU)
+          filebuf[0] = 'O';
+        filesize = 2;
+        break;
+      }
+    }
+
+  if (flags & O_APPEND)
+    position = filesize;
+  else
+    position = 0;
+
+success:
+  res = 1;
+  set_open_status ();
+  set_flags (flags);
+out:
+  syscall_printf ("%d = fhandler_proc::open (%p, %d)", res, flags, mode);
+  return res;
+}