1 files changed, 142 insertions, 0 deletions
diff --git a/gdbsupport/filestuff.h b/gdbsupport/filestuff.h
new file mode 100644
index 00000000000..e36936a84ce
--- /dev/null
+++ b/gdbsupport/filestuff.h
@@ -0,0 +1,142 @@
+/* Low-level file-handling.
+   Copyright (C) 2012-2020 Free Software Foundation, Inc.
+
+   This file is part of GDB.
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
+
+#ifndef COMMON_FILESTUFF_H
+#define COMMON_FILESTUFF_H
+
+#include <dirent.h>
+#include <fcntl.h>
+
+/* Note all the file descriptors which are open when this is called.
+   These file descriptors will not be closed by close_most_fds.  */
+
+extern void notice_open_fds (void);
+
+/* Mark a file descriptor as inheritable across an exec.  */
+
+extern void mark_fd_no_cloexec (int fd);
+
+/* Mark a file descriptor as no longer being inheritable across an
+   exec.  This is only meaningful when FD was previously passed to
+   mark_fd_no_cloexec.  */
+
+extern void unmark_fd_no_cloexec (int fd);
+
+/* Close all open file descriptors other than those marked by
+   'notice_open_fds', and stdin, stdout, and stderr.  Errors that
+   occur while closing are ignored.  */
+
+extern void close_most_fds (void);
+
+/* Like 'open', but ensures that the returned file descriptor has the
+   close-on-exec flag set.  */
+
+extern int gdb_open_cloexec (const char *filename, int flags,
+			     /* mode_t */ unsigned long mode);
+
+/* Like mkstemp, but ensures that the file descriptor is
+   close-on-exec.  */
+
+static inline int
+gdb_mkostemp_cloexec (char *name_template, int flags = 0)
+{
+  /* gnulib provides a mkostemp replacement if needed.  */
+  return mkostemp (name_template, flags | O_CLOEXEC);
+}
+
+/* Convenience wrapper for the above, which takes the filename as an
+   std::string.  */
+
+static inline int
+gdb_open_cloexec (const std::string &filename, int flags,
+		  /* mode_t */ unsigned long mode)
+{
+  return gdb_open_cloexec (filename.c_str (), flags, mode);
+}
+
+struct gdb_file_deleter
+{
+  void operator() (FILE *file) const
+  {
+    fclose (file);
+  }
+};
+
+/* A unique pointer to a FILE.  */
+
+typedef std::unique_ptr<FILE, gdb_file_deleter> gdb_file_up;
+
+/* Like 'fopen', but ensures that the returned file descriptor has the
+   close-on-exec flag set.  */
+
+extern gdb_file_up gdb_fopen_cloexec (const char *filename,
+				      const char *opentype);
+
+/* Convenience wrapper for the above, which takes the filename as an
+   std::string.  */
+
+static inline gdb_file_up
+gdb_fopen_cloexec (const std::string &filename, const char *opentype)
+{
+  return gdb_fopen_cloexec (filename.c_str (), opentype);
+}
+
+/* Like 'socketpair', but ensures that the returned file descriptors
+   have the close-on-exec flag set.  */
+
+extern int gdb_socketpair_cloexec (int domain, int style, int protocol,
+				   int filedes[2]);
+
+/* Like 'socket', but ensures that the returned file descriptor has
+   the close-on-exec flag set.  */
+
+extern int gdb_socket_cloexec (int domain, int style, int protocol);
+
+/* Like 'pipe', but ensures that the returned file descriptors have
+   the close-on-exec flag set.  */
+
+extern int gdb_pipe_cloexec (int filedes[2]);
+
+struct gdb_dir_deleter
+{
+  void operator() (DIR *dir) const
+  {
+    closedir (dir);
+  }
+};
+
+/* A unique pointer to a DIR.  */
+
+typedef std::unique_ptr<DIR, gdb_dir_deleter> gdb_dir_up;
+
+/* Return true if the file NAME exists and is a regular file.
+   If the result is false then *ERRNO_PTR is set to a useful value assuming
+   we're expecting a regular file.  */
+extern bool is_regular_file (const char *name, int *errno_ptr);
+
+
+/* A cheap (as in low-quality) recursive mkdir.  Try to create all the
+   parents directories up to DIR and DIR itself.  Stop if we hit an
+   error along the way.  There is no attempt to remove created
+   directories in case of failure.
+
+   Returns false on failure and sets errno.  */
+
+extern bool mkdir_recursive (const char *dir);
+
+#endif /* COMMON_FILESTUFF_H */