c8d9106a0d
posix_spawn(3POSIX) was introduced by POSIX.1d (IEEE Std 1003.1d-1999), and was later consolidated in POSIX.1-2001, requiring it in all POSIX-compliant systems. It's safe to assume it's always available, more than 20 years after its standardization. Link: <https://pubs.opengroup.org/onlinepubs/9699919799/basedefs/spawn.h.html>
293 lines
6.6 KiB
C
293 lines
6.6 KiB
C
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/*
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* Copyright (C) Igor Sysoev
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* Copyright (C) NGINX, Inc.
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*/
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#ifndef _NXT_UNIX_H_INCLUDED_
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#define _NXT_UNIX_H_INCLUDED_
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#if (NXT_LINUX)
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#ifdef _FORTIFY_SOURCE
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/*
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* _FORTIFY_SOURCE
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* may call sigaltstack() while _longjmp() checking;
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* may cause _longjmp() to fail with message:
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* "longjmp() causes uninitialized stack frame";
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* does not allow to use "(void) write()";
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* does surplus checks.
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*/
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#undef _FORTIFY_SOURCE
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#endif
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#ifndef _GNU_SOURCE
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#define _GNU_SOURCE /* pread(), pwrite(), gethostname(). */
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#endif
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#define _FILE_OFFSET_BITS 64
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#include <malloc.h> /* malloc_usable_size(). */
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#include <sys/syscall.h> /* syscall(SYS_gettid). */
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#if (__GLIBC__ >= 2 && __GLIBC_MINOR__ >= 4)
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/*
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* POSIX semaphores using NPTL atomic/futex operations
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* were introduced during glibc 2.3 development time.
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*/
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#define NXT_HAVE_SEM_TRYWAIT_FAST 1
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#endif
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#endif /* NXT_LINUX */
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#if (NXT_FREEBSD)
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#if (NXT_HAVE_MALLOC_USABLE_SIZE)
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#include <malloc_np.h> /* malloc_usable_size(). */
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#endif
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#if (__FreeBSD_version >= 900007)
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/* POSIX semaphores using atomic/umtx. */
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#define NXT_HAVE_SEM_TRYWAIT_FAST 1
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#endif
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#endif /* NXT_FREEBSD */
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#if (NXT_SOLARIS)
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#ifndef _FILE_OFFSET_BITS
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#define _FILE_OFFSET_BITS 64 /* Must be before <sys/types.h>. */
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#endif
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#ifndef _REENTRANT /* May be set by "-mt" options. */
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#define _REENTRANT /* Thread safe errno. */
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#endif
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#ifndef _POSIX_PTHREAD_SEMANTICS
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#define _POSIX_PTHREAD_SEMANTICS /* 2 arguments in sigwait(). */
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#endif
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/*
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* Solaris provides two sockets API:
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*
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* 1) 4.3BSD sockets (int instead of socklen_t in accept(), etc.;
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* struct msghdr.msg_accrights) in libsocket;
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* 2) X/Open sockets (socklen_t, struct msghdr.msg_control) with __xnet_
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* function name prefix in libxnet and libsocket.
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*/
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/* Enable X/Open sockets API. */
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#define _XOPEN_SOURCE
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#define _XOPEN_SOURCE_EXTENDED 1
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/* Enable Solaris extensions disabled by _XOPEN_SOURCE. */
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#ifndef __EXTENSIONS__
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#define __EXTENSIONS__
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#endif
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#endif /* NXT_SOLARIS */
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#if (NXT_MACOSX)
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#ifndef _DARWIN_C_SOURCE
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#define _DARWIN_C_SOURCE /* pthread_threadid_np(), mach_port_t. */
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#endif
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#include <mach/mach_time.h> /* mach_absolute_time(). */
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#include <malloc/malloc.h> /* malloc_size(). */
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#endif /* NXT_MACOSX */
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#if (NXT_AIX)
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#define _THREAD_SAFE /* Must before any include. */
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#endif /* NXT_AIX */
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#if (NXT_HPUX)
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#define _FILE_OFFSET_BITS 64
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/*
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* HP-UX provides three sockets API:
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*
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* 1) 4.3BSD sockets (int instead of socklen_t in accept(), etc.;
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* struct msghdr.msg_accrights) in libc;
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* 2) X/Open sockets (socklen_t, struct msghdr.msg_control) with _xpg_
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* function name prefix in libc;
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* 3) and X/Open sockets (socklen_t, struct msghdr.msg_control) in libxnet.
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*/
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/* Enable X/Open sockets API. */
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#define _XOPEN_SOURCE
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#define _XOPEN_SOURCE_EXTENDED
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/* Enable static function wrappers for _xpg_ X/Open sockets API in libc. */
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#define _HPUX_ALT_XOPEN_SOCKET_API
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#include <sys/mpctl.h>
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#if (NXT_HAVE_HG_GETHRTIME)
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#include <sys/mercury.h>
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#endif
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#endif /* NXT_HPUX */
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#if (NXT_HAVE_ALLOCA_H)
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#include <alloca.h>
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#endif
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#include <dlfcn.h>
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#include <errno.h>
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#include <fcntl.h>
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#include <grp.h>
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#include <limits.h>
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#include <netdb.h>
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#include <netinet/in.h>
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#include <netinet/tcp.h>
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#include <poll.h>
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#include <pwd.h>
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#include <semaphore.h>
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#include <setjmp.h>
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#include <sched.h>
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#include <signal.h>
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#include <spawn.h>
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#include <stdarg.h>
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#include <stddef.h> /* offsetof() */
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#include <stdio.h>
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#include <stdint.h>
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#include <stdlib.h>
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#include <string.h>
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#include <syslog.h>
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#if (NXT_HAVE_SYS_FILIO_H)
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#include <sys/filio.h> /* FIONBIO */
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#endif
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#include <sys/ioctl.h>
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#include <sys/mman.h>
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#include <sys/param.h> /* MAXPATHLEN */
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#include <sys/resource.h>
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#include <sys/socket.h>
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#include <sys/stat.h>
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#include <sys/time.h>
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#include <sys/types.h>
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#include <sys/uio.h>
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#if (NXT_HAVE_UNIX_DOMAIN)
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#include <sys/un.h>
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#endif
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#include <sys/wait.h>
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#include <time.h>
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#include <unistd.h>
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#include <pthread.h>
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#if (NXT_HAVE_EPOLL)
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#include <sys/epoll.h>
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#ifdef EPOLLRDHUP
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/*
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* Epoll edge-tiggered mode is pretty much useless without EPOLLRDHUP support.
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*/
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#define NXT_HAVE_EPOLL_EDGE 1
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#endif
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#endif
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#if (NXT_HAVE_SIGNALFD)
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#include <sys/signalfd.h>
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#endif
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#if (NXT_HAVE_EVENTFD)
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#include <sys/eventfd.h>
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#endif
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#if (NXT_HAVE_KQUEUE)
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#include <sys/event.h>
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#endif
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#if (NXT_HAVE_EVENTPORT)
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#include <port.h>
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#endif
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#if (NXT_HAVE_DEVPOLL)
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#include <sys/devpoll.h>
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#endif
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#if (NXT_HAVE_POLLSET)
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#include <sys/pollset.h>
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#endif
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#if (NXT_HAVE_LINUX_SENDFILE)
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#include <sys/sendfile.h>
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#endif
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#if (NXT_HAVE_SOLARIS_SENDFILEV)
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#include <sys/sendfile.h>
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#endif
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#if (NXT_HAVE_GETRANDOM)
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#include <sys/random.h> /* getrandom(). */
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#elif (NXT_HAVE_LINUX_SYS_GETRANDOM)
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#include <linux/random.h> /* SYS_getrandom. */
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#elif (NXT_HAVE_GETENTROPY_SYS_RANDOM)
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#include <sys/random.h> /* getentropy(). */
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#endif
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#if (NXT_HAVE_ISOLATION_ROOTFS)
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#include <sys/mount.h>
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#endif
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#if (NXT_HAVE_OPENAT2)
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#include <linux/openat2.h>
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#endif
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#if (NXT_TEST_BUILD)
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#include <nxt_test_build.h>
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#endif
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/*
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* On Linux IOV_MAX is 1024. Linux uses kernel stack for 8 iovec's
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* to avoid kernel allocation/deallocation.
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*
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* On FreeBSD IOV_MAX is 1024. FreeBSD used kernel stack for 8 iovec's
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* to avoid kernel allocation/deallocation until FreeBSD 5.2.
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* FreeBSD 5.2 and later do not use stack at all.
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*
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* On Solaris IOV_MAX is 16 and Solaris uses only kernel stack.
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*
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* On MacOSX IOV_MAX is 1024. MacOSX used kernel stack for 8 iovec's
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* to avoid kernel allocation/deallocation until MacOSX 10.4 (Tiger).
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* MacOSX 10.4 and later do not use stack at all.
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*
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* On NetBSD, OpenBSD, and DragonFlyBSD IOV_MAX is 1024. All these OSes
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* uses kernel stack for 8 iovec's to avoid kernel allocation/deallocation.
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*
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* On AIX and HP-UX IOV_MAX is 16.
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*/
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#define NXT_IOBUF_MAX 8
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typedef struct iovec nxt_iobuf_t;
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#define nxt_iobuf_data(iob) \
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(iob)->iov_base
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#define nxt_iobuf_size(iob) \
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(iob)->iov_len
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#define nxt_iobuf_set(iob, p, size) \
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do { \
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(iob)->iov_base = (void *) p; \
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(iob)->iov_len = size; \
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} while (0)
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#define nxt_iobuf_add(iob, size) \
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(iob)->iov_len += size
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#endif /* _NXT_UNIX_H_INCLUDED_ */
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