include/sysemu/os-posix.h

   1 /*
   2  * posix specific declarations
   3  *
   4  * Copyright (c) 2003-2008 Fabrice Bellard
   5  * Copyright (c) 2010 Jes Sorensen <Jes.Sorensen@redhat.com>
   6  *
   7  * Permission is hereby granted, free of charge, to any person obtaining a copy
   8  * of this software and associated documentation files (the "Software"), to deal
   9  * in the Software without restriction, including without limitation the rights
  10  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  11  * copies of the Software, and to permit persons to whom the Software is
  12  * furnished to do so, subject to the following conditions:
  13  *
  14  * The above copyright notice and this permission notice shall be included in
  15  * all copies or substantial portions of the Software.
  16  *
  17  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  18  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  19  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
  20  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  21  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  22  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  23  * THE SOFTWARE.
  24  */
  25
  26 #ifndef QEMU_OS_POSIX_H
  27 #define QEMU_OS_POSIX_H
  28
  29 #include <sys/mman.h>
  30 #include <sys/socket.h>
  31 #include <netinet/in.h>
  32 #include <netinet/tcp.h>
  33 #include <arpa/inet.h>
  34 #include <netdb.h>
  35 #include <sys/un.h>
  36
  37 #ifdef CONFIG_SYSMACROS
  38 #include <sys/sysmacros.h>
  39 #endif
  40
  41 #ifdef __cplusplus
  42 extern "C" {
  43 #endif
  44
  45 void os_set_line_buffering(void);
  46 void os_setup_early_signal_handling(void);
  47 void os_set_proc_name(const char *s);
  48 void os_setup_signal_handling(void);
  49 int os_set_daemonize(bool d);
  50 bool is_daemonized(void);
  51 void os_daemonize(void);
  52 bool os_set_runas(const char *user_id);
  53 void os_set_chroot(const char *path);
  54 void os_setup_limits(void);
  55 void os_setup_post(void);
  56 int os_mlock(void);
  57
  58 /**
  59  * qemu_alloc_stack:
  60  * @sz: pointer to a size_t holding the requested usable stack size
  61  *
  62  * Allocate memory that can be used as a stack, for instance for
  63  * coroutines. If the memory cannot be allocated, this function
  64  * will abort (like g_malloc()). This function also inserts an
  65  * additional guard page to catch a potential stack overflow.
  66  * Note that the memory required for the guard page and alignment
  67  * and minimal stack size restrictions will increase the value of sz.
  68  *
  69  * The allocated stack must be freed with qemu_free_stack().
  70  *
  71  * Returns: pointer to (the lowest address of) the stack memory.
  72  */
  73 void *qemu_alloc_stack(size_t *sz);
  74
  75 /**
  76  * qemu_free_stack:
  77  * @stack: stack to free
  78  * @sz: size of stack in bytes
  79  *
  80  * Free a stack allocated via qemu_alloc_stack(). Note that sz must
  81  * be exactly the adjusted stack size returned by qemu_alloc_stack.
  82  */
  83 void qemu_free_stack(void *stack, size_t sz);
  84
  85 /* POSIX and Mingw32 differ in the name of the stdio lock functions.  */
  86
  87 static inline void qemu_flockfile(FILE *f)
  88 {
  89     flockfile(f);
  90 }
  91
  92 static inline void qemu_funlockfile(FILE *f)
  93 {
  94     funlockfile(f);
  95 }
  96
  97 #ifdef __cplusplus
  98 }
  99 #endif
 100
 101 #endif