qemu/include/sysemu/os-posix.h

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/*
* posix specific declarations
*
* Copyright (c) 2003-2008 Fabrice Bellard
* Copyright (c) 2010 Jes Sorensen <Jes.Sorensen@redhat.com>
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
#ifndef QEMU_OS_POSIX_H
#define QEMU_OS_POSIX_H
#include <sys/mman.h>
osdep: add wrappers for socket functions The windows socket functions look identical to the normal POSIX sockets functions, but instead of setting errno, the caller needs to call WSAGetLastError(). QEMU has tried to deal with this incompatibility by defining a socket_error() method that callers must use that abstracts the difference between WSAGetLastError() and errno. This approach is somewhat error prone though - many callers of the sockets functions are just using errno directly because it is easy to forget the need use a QEMU specific wrapper. It is not always immediately obvious that a particular function will in fact call into Windows sockets functions, so the dev may not even realize they need to use socket_error(). This introduces an alternative approach to portability inspired by the way GNULIB fixes portability problems. We use a macro to redefine the original socket function names to refer to a QEMU wrapper function. The wrapper function calls the original Win32 sockets method and then sets errno from the WSAGetLastError() value. Thus all code can simply call the normal POSIX sockets APIs are have standard errno reporting on error, even on Windows. This makes the socket_error() method obsolete. We also bring closesocket & ioctlsocket into this approach. Even though they are non-standard Win32 names, we can't wrap the normal close/ioctl methods since there's no reliable way to distinguish between a file descriptor and HANDLE in Win32. Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
2016-03-07 23:25:19 +03:00
#include <sys/socket.h>
#include <netinet/in.h>
#include <netinet/tcp.h>
#include <arpa/inet.h>
#include <netdb.h>
#include <sys/un.h>
void os_set_line_buffering(void);
void os_set_proc_name(const char *s);
void os_setup_signal_handling(void);
void os_daemonize(void);
void os_setup_post(void);
int os_mlock(void);
osdep: add wrappers for socket functions The windows socket functions look identical to the normal POSIX sockets functions, but instead of setting errno, the caller needs to call WSAGetLastError(). QEMU has tried to deal with this incompatibility by defining a socket_error() method that callers must use that abstracts the difference between WSAGetLastError() and errno. This approach is somewhat error prone though - many callers of the sockets functions are just using errno directly because it is easy to forget the need use a QEMU specific wrapper. It is not always immediately obvious that a particular function will in fact call into Windows sockets functions, so the dev may not even realize they need to use socket_error(). This introduces an alternative approach to portability inspired by the way GNULIB fixes portability problems. We use a macro to redefine the original socket function names to refer to a QEMU wrapper function. The wrapper function calls the original Win32 sockets method and then sets errno from the WSAGetLastError() value. Thus all code can simply call the normal POSIX sockets APIs are have standard errno reporting on error, even on Windows. This makes the socket_error() method obsolete. We also bring closesocket & ioctlsocket into this approach. Even though they are non-standard Win32 names, we can't wrap the normal close/ioctl methods since there's no reliable way to distinguish between a file descriptor and HANDLE in Win32. Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
2016-03-07 23:25:19 +03:00
#define closesocket(s) close(s)
#define ioctlsocket(s, r, v) ioctl(s, r, v)
typedef struct timeval qemu_timeval;
#define qemu_gettimeofday(tp) gettimeofday(tp, NULL)
virtio-9p: fix build on !CONFIG_UTIMENSAT This patch introduce a fallback mechanism for old systems that do not support utimensat(). This fix build failure with following warnings: hw/virtio-9p-local.c: In function 'local_utimensat': hw/virtio-9p-local.c:479: warning: implicit declaration of function 'utimensat' hw/virtio-9p-local.c:479: warning: nested extern declaration of 'utimensat' and: hw/virtio-9p.c: In function 'v9fs_setattr_post_chmod': hw/virtio-9p.c:1410: error: 'UTIME_NOW' undeclared (first use in this function) hw/virtio-9p.c:1410: error: (Each undeclared identifier is reported only once hw/virtio-9p.c:1410: error: for each function it appears in.) hw/virtio-9p.c:1413: error: 'UTIME_OMIT' undeclared (first use in this function) hw/virtio-9p.c: In function 'v9fs_wstat_post_chmod': hw/virtio-9p.c:2905: error: 'UTIME_OMIT' undeclared (first use in this function) [NOTE: At this time virtio-9p is only user of utimensat(), and is available only when host is linux and CONFIG_VIRTFS is defined. So there are no similar warning for win32. Please provide a wrapper for win32 in oslib-win32.c if new user really requires it.] v5: - Allow fallback on runtime - Move qemu_utimensat() to oslib-posix.c - Rebased on latest qemu.git v4: - Use tv_now.tv_usec v3: - Use better alternative handling for UTIME_NOW/OMIT - Move qemu_utimensat() to cutils.c V2: - Introduce qemu_utimensat() Acked-by: Chris Wright <chrisw@sous-sol.org> Acked-by: M. Mohan Kumar <mohan@in.ibm.com> Acked-by: Jes Sorensen <Jes.Sorensen@redhat.com> Signed-off-by: Hidetoshi Seto <seto.hidetoshi@jp.fujitsu.com> Signed-off-by: Venkateswararao Jujjuri <jvrao@linux.vnet.ibm.com>
2010-11-24 05:38:10 +03:00
#ifndef CONFIG_UTIMENSAT
#ifndef UTIME_NOW
# define UTIME_NOW ((1l << 30) - 1l)
#endif
#ifndef UTIME_OMIT
# define UTIME_OMIT ((1l << 30) - 2l)
#endif
#endif
typedef struct timespec qemu_timespec;
int qemu_utimens(const char *path, const qemu_timespec *times);
virtio-9p: fix build on !CONFIG_UTIMENSAT This patch introduce a fallback mechanism for old systems that do not support utimensat(). This fix build failure with following warnings: hw/virtio-9p-local.c: In function 'local_utimensat': hw/virtio-9p-local.c:479: warning: implicit declaration of function 'utimensat' hw/virtio-9p-local.c:479: warning: nested extern declaration of 'utimensat' and: hw/virtio-9p.c: In function 'v9fs_setattr_post_chmod': hw/virtio-9p.c:1410: error: 'UTIME_NOW' undeclared (first use in this function) hw/virtio-9p.c:1410: error: (Each undeclared identifier is reported only once hw/virtio-9p.c:1410: error: for each function it appears in.) hw/virtio-9p.c:1413: error: 'UTIME_OMIT' undeclared (first use in this function) hw/virtio-9p.c: In function 'v9fs_wstat_post_chmod': hw/virtio-9p.c:2905: error: 'UTIME_OMIT' undeclared (first use in this function) [NOTE: At this time virtio-9p is only user of utimensat(), and is available only when host is linux and CONFIG_VIRTFS is defined. So there are no similar warning for win32. Please provide a wrapper for win32 in oslib-win32.c if new user really requires it.] v5: - Allow fallback on runtime - Move qemu_utimensat() to oslib-posix.c - Rebased on latest qemu.git v4: - Use tv_now.tv_usec v3: - Use better alternative handling for UTIME_NOW/OMIT - Move qemu_utimensat() to cutils.c V2: - Introduce qemu_utimensat() Acked-by: Chris Wright <chrisw@sous-sol.org> Acked-by: M. Mohan Kumar <mohan@in.ibm.com> Acked-by: Jes Sorensen <Jes.Sorensen@redhat.com> Signed-off-by: Hidetoshi Seto <seto.hidetoshi@jp.fujitsu.com> Signed-off-by: Venkateswararao Jujjuri <jvrao@linux.vnet.ibm.com>
2010-11-24 05:38:10 +03:00
bool is_daemonized(void);
#endif