wrapper/fdtable.h

   1 #ifndef _LTTNG_WRAPPER_FDTABLE_H
   2 #define _LTTNG_WRAPPER_FDTABLE_H
   3
   4 /*
   5  * wrapper/fdtable.h
   6  *
   7  * Copyright (C) 2013 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
   8  *
   9  * This library is free software; you can redistribute it and/or
  10  * modify it under the terms of the GNU Lesser General Public
  11  * License as published by the Free Software Foundation; only
  12  * version 2.1 of the License.
  13  *
  14  * This library is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  17  * Lesser General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU Lesser General Public
  20  * License along with this library; if not, write to the Free Software
  21  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  22  */
  23
  24 #include <linux/version.h>
  25 #include <linux/fdtable.h>
  26
  27 #if (LINUX_VERSION_CODE < KERNEL_VERSION(3,7,0))
  28
  29 int lttng_iterate_fd(struct files_struct *files,
  30                 unsigned int first,
  31                 int (*cb)(const void *, struct file *, unsigned int),
  32                 const void *ctx);
  33
  34 #else
  35
  36 /*
  37  * iterate_fd() appeared at commit
  38  * c3c073f808b22dfae15ef8412b6f7b998644139a in the Linux kernel (first
  39  * released kernel: v3.7).
  40  */
  41 #define lttng_iterate_fd        iterate_fd
  42
  43 #endif
  44
  45 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(3,4,0))
  46
  47 static inline bool lttng_close_on_exec(int fd, const struct fdtable *fdt)
  48 {
  49         return close_on_exec(fd, fdt);
  50 }
  51
  52 #else
  53
  54 static inline bool lttng_close_on_exec(int fd, const struct fdtable *fdt)
  55 {
  56         return FD_ISSET(fd, fdt->close_on_exec);
  57 }
  58
  59 #endif
  60
  61 #endif /* _LTTNG_WRAPPER_FDTABLE_H */