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0925a97729
Select and FD_ISSET are declared in sys/time.h on most versions of hpux. As a result, HAVE_PSELECT and HAVE_SELECT can be 0. 2023-01-08 John David Anglin <danglin@gcc.gnu.org> c++tools/ChangeLog: PR other/107616 * server.cc (server): Don't call FD_ISSET when HAVE_PSELECT and HAVE_SELECT are zero.
1013 lines
23 KiB
C++
1013 lines
23 KiB
C++
/* C++ modules. Experimental!
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Copyright (C) 2018-2023 Free Software Foundation, Inc.
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Written by Nathan Sidwell <nathan@acm.org> while at FaceBook
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This file is part of GCC.
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GCC is free software; you can redistribute it and/or modify it
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under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3, or (at your option)
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any later version.
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GCC is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with GCC; see the file COPYING3. If not see
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<http://www.gnu.org/licenses/>. */
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#include "config.h"
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#include "resolver.h"
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// C++
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#include <set>
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#include <vector>
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#include <map>
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// C
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#include <csignal>
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#include <cstring>
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#include <cstdarg>
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#include <cstdlib>
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// OS
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#include <unistd.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <fcntl.h>
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// Network
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/* Include network stuff first. Excitingly OSX10.14 uses bcmp here, which
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we poison later! */
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#if defined (HAVE_AF_UNIX) || defined (HAVE_AF_INET6)
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/* socket, bind, listen, accept{4} */
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# define NETWORKING 1
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# include <sys/socket.h>
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# ifdef HAVE_AF_UNIX
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/* sockaddr_un */
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# include <sys/un.h>
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# endif
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# include <netinet/in.h>
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# ifdef HAVE_AF_INET6
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/* sockaddr_in6, getaddrinfo, freeaddrinfo, gai_sterror, ntohs, htons. */
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# include <netdb.h>
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# endif
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#ifdef HAVE_INET_NTOP
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/* inet_ntop. */
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#include <arpa/inet.h>
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#endif
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#endif
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#ifndef HAVE_AF_INET6
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# define gai_strerror(X) ""
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#endif
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#ifndef AI_NUMERICSERV
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#define AI_NUMERICSERV 0
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#endif
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#include <getopt.h>
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// Select or epoll
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#if NETWORKING
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#ifdef HAVE_EPOLL
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/* epoll_create, epoll_ctl, epoll_pwait */
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#include <sys/epoll.h>
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#endif
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#if defined (HAVE_PSELECT) || defined (HAVE_SELECT)
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/* pselect or select */
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#include <sys/select.h>
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#endif
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#endif
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// GCC
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#include "version.h"
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#include "ansidecl.h"
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#define HAVE_DECL_BASENAME 1 /* See comment in gcc/configure.ac. */
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#include "libiberty.h"
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#if !HOST_HAS_O_CLOEXEC
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#define O_CLOEXEC 0
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#endif
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#ifndef IS_DIR_SEPARATOR
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#define IS_DIR_SEPARATOR(C) ((C) == '/')
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#endif
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#ifndef DIR_SEPARATOR
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#define DIR_SEPARATOR '/'
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#endif
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/* Imported from libcpp/system.h
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Use gcc_assert(EXPR) to test invariants. */
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#if ENABLE_ASSERT_CHECKING
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#define gcc_assert(EXPR) \
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((void)(!(EXPR) ? fancy_abort (__FILE__, __LINE__, __FUNCTION__), 0 : 0))
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#elif (GCC_VERSION >= 4005)
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#define gcc_assert(EXPR) \
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((void)(__builtin_expect (!(EXPR), 0) ? __builtin_unreachable (), 0 : 0))
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#else
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/* Include EXPR, so that unused variable warnings do not occur. */
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#define gcc_assert(EXPR) ((void)(0 && (EXPR)))
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#endif
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/* Use gcc_unreachable() to mark unreachable locations (like an
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unreachable default case of a switch. Do not use gcc_assert(0). */
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#if (GCC_VERSION >= 4005) && !ENABLE_ASSERT_CHECKING
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#define gcc_unreachable() __builtin_unreachable ()
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#else
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#define gcc_unreachable() (fancy_abort (__FILE__, __LINE__, __FUNCTION__))
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#endif
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#if NETWORKING
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struct netmask {
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in6_addr addr;
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unsigned bits;
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netmask (const in6_addr &a, unsigned b)
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{
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if (b > sizeof (in6_addr) * 8)
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b = sizeof (in6_addr) * 8;
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bits = b;
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unsigned byte = (b + 7) / 8;
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unsigned ix = 0;
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for (ix = 0; ix < byte; ix++)
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addr.s6_addr[ix] = a.s6_addr[ix];
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for (; ix != sizeof (in6_addr); ix++)
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addr.s6_addr[ix] = 0;
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if (b & 3)
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addr.s6_addr[b/7] &= (255 << 8) >> (b & 3);
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}
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bool includes (const in6_addr &a) const
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{
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unsigned byte = bits / 8;
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for (unsigned ix = 0; ix != byte; ix++)
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if (addr.s6_addr[ix] != a.s6_addr[ix])
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return false;
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if (bits & 3)
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if ((addr.s6_addr[byte] ^ a.s6_addr[byte]) >> (8 - (bits & 3)))
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return false;
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return true;
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}
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};
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/* Netmask comparison. */
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struct netmask_cmp {
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bool operator() (const netmask &a, const netmask &b) const
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{
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if (a.bits != b.bits)
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return a.bits < b.bits;
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for (unsigned ix = 0; ix != sizeof (in6_addr); ix++)
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if (a.addr.s6_addr[ix] != b.addr.s6_addr[ix])
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return a.addr.s6_addr[ix] < b.addr.s6_addr[ix];
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return false;
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}
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};
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typedef std::set<netmask, netmask_cmp> netmask_set_t;
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typedef std::vector<netmask> netmask_vec_t;
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#endif
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const char *progname;
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/* Speak thoughts out loud. */
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static bool flag_noisy = false;
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/* One and done. */
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static bool flag_one = false;
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/* Serialize connections. */
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static bool flag_sequential = false;
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/* Fallback to default if map file is unrewarding. */
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static bool flag_map = false;
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/* Fallback to xlate if map file is unrewarding. */
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static bool flag_xlate = false;
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/* Root binary directory. */
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static const char *flag_root = "gcm.cache";
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#if NETWORKING
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static netmask_set_t netmask_set;
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static netmask_vec_t accept_addrs;
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#endif
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/* Strip out the source directory from FILE. */
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static const char *
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trim_src_file (const char *file)
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{
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static const char me[] = __FILE__;
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unsigned pos = 0;
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while (file[pos] == me[pos] && me[pos])
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pos++;
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while (pos && !IS_DIR_SEPARATOR (me[pos-1]))
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pos--;
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return file + pos;
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}
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/* Die screaming. */
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void ATTRIBUTE_NORETURN ATTRIBUTE_PRINTF_1 ATTRIBUTE_COLD
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internal_error (const char *fmt, ...)
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{
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fprintf (stderr, "%s:Internal error ", progname);
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va_list args;
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va_start (args, fmt);
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vfprintf (stderr, fmt, args);
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va_end (args);
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fprintf (stderr, "\n");
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exit (2);
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}
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/* Hooked to from gcc_assert & gcc_unreachable. */
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#if ENABLE_ASSERT_CHECKING
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void ATTRIBUTE_NORETURN ATTRIBUTE_COLD
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fancy_abort (const char *file, int line, const char *func)
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{
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internal_error ("in %s, at %s:%d", func, trim_src_file (file), line);
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}
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#endif
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/* Exploded on a signal. */
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static void ATTRIBUTE_NORETURN ATTRIBUTE_COLD
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crash_signal (int sig)
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{
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signal (sig, SIG_DFL);
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// strsignal is not portable :(
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internal_error ("signal %d", sig);
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}
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/* A fatal error of some kind. */
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static void ATTRIBUTE_NORETURN ATTRIBUTE_COLD ATTRIBUTE_PRINTF_1
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error (const char *msg, ...)
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{
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fprintf (stderr, "%s:error: ", progname);
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va_list args;
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va_start (args, msg);
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vfprintf (stderr, msg, args);
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va_end (args);
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fprintf (stderr, "\n");
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exit (1);
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}
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#if NETWORKING
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/* Progress messages to the user. */
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static bool ATTRIBUTE_PRINTF_1 ATTRIBUTE_COLD
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noisy (const char *fmt, ...)
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{
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fprintf (stderr, "%s:", progname);
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va_list args;
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va_start (args, fmt);
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vfprintf (stderr, fmt, args);
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va_end (args);
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fprintf (stderr, "\n");
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return false;
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}
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#endif
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/* More messages to the user. */
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static void ATTRIBUTE_PRINTF_2
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fnotice (FILE *file, const char *fmt, ...)
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{
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va_list args;
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va_start (args, fmt);
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vfprintf (file, fmt, args);
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va_end (args);
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}
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static void ATTRIBUTE_NORETURN
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print_usage (int error_p)
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{
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FILE *file = error_p ? stderr : stdout;
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int status = error_p ? 1 : 0;
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fnotice (file, "Usage: %s [OPTION...] [CONNECTION] [MAPPINGS...] \n\n",
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progname);
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fnotice (file, "C++ Module Mapper.\n\n");
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fnotice (file, " -a, --accept Netmask to accept from\n");
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fnotice (file, " -f, --fallback Use fallback for missing mappings\n");
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fnotice (file, " -h, --help Print this help, then exit\n");
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fnotice (file, " -n, --noisy Print progress messages\n");
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fnotice (file, " -1, --one One connection and then exit\n");
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fnotice (file, " -r, --root DIR Root compiled module directory\n");
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fnotice (file, " -s, --sequential Process connections sequentially\n");
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fnotice (file, " -v, --version Print version number, then exit\n");
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fnotice (file, "Send SIGTERM(%d) to terminate\n", SIGTERM);
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fnotice (file, "\nFor bug reporting instructions, please see:\n%s.\n",
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bug_report_url);
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exit (status);
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}
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/* Print version information and exit. */
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static void ATTRIBUTE_NORETURN
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print_version (void)
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{
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fnotice (stdout, "%s %s%s\n", progname, pkgversion_string, version_string);
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fprintf (stdout, "Copyright %s 2018-2023 Free Software Foundation, Inc.\n",
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("(C)"));
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fnotice (stdout,
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("This is free software; see the source for copying conditions.\n"
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"There is NO warranty; not even for MERCHANTABILITY or \n"
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"FITNESS FOR A PARTICULAR PURPOSE.\n\n"));
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exit (0);
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}
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/* ARG is a netmask to accept from. Add it to the table. Return
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false if we fail to resolve it. */
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static bool
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accept_from (char *arg ATTRIBUTE_UNUSED)
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{
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bool ok = true;
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#if HAVE_AF_INET6
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unsigned bits = sizeof (in6_addr) * 8;
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char *slash = strrchr (arg, '/');
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if (slash)
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{
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*slash = 0;
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if (slash[1])
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{
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char *endp;
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bits = strtoul (slash + 1, &endp, 0);
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}
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}
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addrinfo hints;
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hints.ai_flags = AI_NUMERICSERV;
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hints.ai_family = AF_INET6;
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hints.ai_socktype = SOCK_STREAM;
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hints.ai_protocol = 0;
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hints.ai_addrlen = 0;
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hints.ai_addr = NULL;
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hints.ai_canonname = NULL;
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hints.ai_next = NULL;
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struct addrinfo *addrs = NULL;
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/* getaddrinfo requires either hostname or servname to be non-null, so that we must
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set a port number (to cover the case that the string passed contains just /NN).
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Use an arbitrary in-range port number, but avoiding "0" which triggers a bug on
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some BSD variants. */
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if (int e = getaddrinfo (slash == arg ? NULL : arg, "1", &hints, &addrs))
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{
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noisy ("cannot resolve '%s': %s", arg, gai_strerror (e));
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ok = false;
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}
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else
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for (addrinfo *next = addrs; next; next = next->ai_next)
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if (next->ai_family == AF_INET6)
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{
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netmask mask (((const sockaddr_in6 *)next->ai_addr)->sin6_addr, bits);
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netmask_set.insert (mask);
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}
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freeaddrinfo (addrs);
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#endif
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return ok;
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}
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/* Process args, return index to first non-arg. */
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static int
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process_args (int argc, char **argv)
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{
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static const struct option options[] =
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{
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{ "accept", required_argument, NULL, 'a' },
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{ "help", no_argument, NULL, 'h' },
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{ "map", no_argument, NULL, 'm' },
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{ "noisy", no_argument, NULL, 'n' },
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{ "one", no_argument, NULL, '1' },
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{ "root", required_argument, NULL, 'r' },
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{ "sequential", no_argument, NULL, 's' },
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{ "translate",no_argument, NULL, 't' },
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{ "version", no_argument, NULL, 'v' },
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{ 0, 0, 0, 0 }
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};
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int opt;
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bool bad_accept = false;
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const char *opts = "a:fhmn1r:stv";
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while ((opt = getopt_long (argc, argv, opts, options, NULL)) != -1)
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{
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switch (opt)
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{
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case 'a':
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if (!accept_from (optarg))
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bad_accept = true;
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break;
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case 'h':
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print_usage (false);
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/* print_usage will exit. */
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case 'f': // deprecated alias
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case 'm':
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flag_map = true;
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break;
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case 'n':
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flag_noisy = true;
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break;
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case '1':
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flag_one = true;
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break;
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case 'r':
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flag_root = optarg;
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break;
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case 's':
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flag_sequential = true;
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break;
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case 't':
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flag_xlate = true;
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break;
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case 'v':
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print_version ();
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/* print_version will exit. */
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default:
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print_usage (true);
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/* print_usage will exit. */
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}
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}
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|
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if (bad_accept)
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error ("failed to resolve all accept addresses");
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return optind;
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}
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|
|
#if NETWORKING
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|
|
/* Manipulate the EPOLL state, or do nothing, if there is epoll. */
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|
|
|
#ifdef HAVE_EPOLL
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|
static inline void
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|
do_epoll_ctl (int epoll_fd, int code, int event, int fd, unsigned data)
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|
{
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|
epoll_event ev;
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|
ev.events = event;
|
|
ev.data.u32 = data;
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|
if (epoll_ctl (epoll_fd, code, fd, &ev))
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|
{
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|
noisy ("epoll_ctl error:%s", xstrerror (errno));
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|
gcc_unreachable ();
|
|
}
|
|
}
|
|
#define my_epoll_ctl(EFD,C,EV,FD,CL) \
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((EFD) >= 0 ? do_epoll_ctl (EFD,C,EV,FD,CL) : (void)0)
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|
#else
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#define my_epoll_ctl(EFD,C,EV,FD,CL) ((void)(EFD), (void)(FD), (void)(CL))
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|
#endif
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|
|
|
/* We increment this to tell the server to shut down. */
|
|
static volatile int term = false;
|
|
static volatile int kill_sock_fd = -1;
|
|
#if !defined (HAVE_PSELECT) && defined (HAVE_SELECT)
|
|
static int term_pipe[2] = {-1, -1};
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|
#else
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|
#define term_pipe ((int *)NULL)
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|
#endif
|
|
|
|
/* A terminate signal. Shutdown gracefully. */
|
|
|
|
static void
|
|
term_signal (int sig)
|
|
{
|
|
signal (sig, term_signal);
|
|
term = term + 1;
|
|
if (term_pipe && term_pipe[1] >= 0)
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|
write (term_pipe[1], &term_pipe[1], 1);
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|
}
|
|
|
|
/* A kill signal. Shutdown immediately. */
|
|
|
|
static void
|
|
kill_signal (int sig)
|
|
{
|
|
signal (sig, SIG_DFL);
|
|
int sock_fd = kill_sock_fd;
|
|
if (sock_fd >= 0)
|
|
close (sock_fd);
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|
exit (2);
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|
}
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|
|
|
bool process_server (Cody::Server *server, unsigned slot, int epoll_fd)
|
|
{
|
|
switch (server->GetDirection ())
|
|
{
|
|
case Cody::Server::READING:
|
|
if (int err = server->Read ())
|
|
return !(err == EINTR || err == EAGAIN);
|
|
server->ProcessRequests ();
|
|
server->PrepareToWrite ();
|
|
break;
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|
|
case Cody::Server::WRITING:
|
|
if (int err = server->Write ())
|
|
return !(err == EINTR || err == EAGAIN);
|
|
server->PrepareToRead ();
|
|
break;
|
|
|
|
default:
|
|
// We should never get here
|
|
return true;
|
|
}
|
|
|
|
// We've changed direction, so update epoll
|
|
gcc_assert (server->GetFDRead () == server->GetFDWrite ());
|
|
my_epoll_ctl (epoll_fd, EPOLL_CTL_MOD,
|
|
server->GetDirection () == Cody::Server::READING
|
|
? EPOLLIN : EPOLLOUT, server->GetFDRead (), slot + 1);
|
|
|
|
return false;
|
|
}
|
|
|
|
void close_server (Cody::Server *server, int epoll_fd)
|
|
{
|
|
my_epoll_ctl (epoll_fd, EPOLL_CTL_DEL, EPOLLIN, server->GetFDRead (), 0);
|
|
|
|
close (server->GetFDRead ());
|
|
|
|
delete server;
|
|
}
|
|
|
|
int open_server (bool ip6, int sock_fd)
|
|
{
|
|
sockaddr_in6 addr;
|
|
socklen_t addr_len = sizeof (addr);
|
|
|
|
#ifdef HAVE_ACCEPT4
|
|
int client_fd = accept4 (sock_fd, ip6 ? (sockaddr *)&addr : nullptr,
|
|
&addr_len, SOCK_NONBLOCK);
|
|
#else
|
|
int client_fd = accept (sock_fd, ip6 ? (sockaddr *)&addr : nullptr, &addr_len);
|
|
#endif
|
|
if (client_fd < 0)
|
|
{
|
|
error ("cannot accept: %s", xstrerror (errno));
|
|
flag_one = true;
|
|
}
|
|
else if (ip6)
|
|
{
|
|
const char *str = NULL;
|
|
#if HAVE_INET_NTOP
|
|
char name[INET6_ADDRSTRLEN];
|
|
str = inet_ntop (addr.sin6_family, &addr.sin6_addr, name, sizeof (name));
|
|
#endif
|
|
if (!accept_addrs.empty ())
|
|
{
|
|
netmask_vec_t::iterator e = accept_addrs.end ();
|
|
for (netmask_vec_t::iterator i = accept_addrs.begin ();
|
|
i != e; ++i)
|
|
if (i->includes (addr.sin6_addr))
|
|
goto present;
|
|
close (client_fd);
|
|
client_fd = -1;
|
|
noisy ("Rejecting connection from disallowed source '%s'",
|
|
str ? str : "");
|
|
present:;
|
|
}
|
|
if (client_fd >= 0)
|
|
flag_noisy && noisy ("Accepting connection from '%s'", str ? str : "");
|
|
}
|
|
|
|
return client_fd;
|
|
}
|
|
|
|
/* A server listening on bound socket SOCK_FD. */
|
|
|
|
static void
|
|
server (bool ipv6, int sock_fd, module_resolver *resolver)
|
|
{
|
|
int epoll_fd = -1;
|
|
|
|
signal (SIGTERM, term_signal);
|
|
#ifdef HAVE_EPOLL
|
|
epoll_fd = epoll_create (1);
|
|
#endif
|
|
if (epoll_fd >= 0)
|
|
my_epoll_ctl (epoll_fd, EPOLL_CTL_ADD, EPOLLIN, sock_fd, 0);
|
|
|
|
#if defined (HAVE_EPOLL) || defined (HAVE_PSELECT) || defined (HAVE_SELECT)
|
|
sigset_t mask;
|
|
{
|
|
sigset_t block;
|
|
sigemptyset (&block);
|
|
sigaddset (&block, SIGTERM);
|
|
sigprocmask (SIG_BLOCK, &block, &mask);
|
|
}
|
|
#endif
|
|
|
|
#ifdef HAVE_EPOLL
|
|
const unsigned max_events = 20;
|
|
epoll_event events[max_events];
|
|
#endif
|
|
#if defined (HAVE_PSELECT) || defined (HAVE_SELECT)
|
|
fd_set readers, writers;
|
|
#endif
|
|
if (term_pipe)
|
|
pipe (term_pipe);
|
|
|
|
// We need stable references to servers, so this array can contain nulls
|
|
std::vector<Cody::Server *> connections;
|
|
unsigned live = 0;
|
|
while (sock_fd >= 0 || live)
|
|
{
|
|
/* Wait for one or more events. */
|
|
bool eintr = false;
|
|
int event_count;
|
|
|
|
if (epoll_fd >= 0)
|
|
{
|
|
#ifdef HAVE_EPOLL
|
|
event_count = epoll_pwait (epoll_fd, events, max_events, -1, &mask);
|
|
#endif
|
|
}
|
|
else
|
|
{
|
|
#if defined (HAVE_PSELECT) || defined (HAVE_SELECT)
|
|
FD_ZERO (&readers);
|
|
FD_ZERO (&writers);
|
|
|
|
unsigned limit = 0;
|
|
if (sock_fd >= 0
|
|
&& !(term || (live && (flag_one || flag_sequential))))
|
|
{
|
|
FD_SET (sock_fd, &readers);
|
|
limit = sock_fd + 1;
|
|
}
|
|
|
|
if (term_pipe && term_pipe[0] >= 0)
|
|
{
|
|
FD_SET (term_pipe[0], &readers);
|
|
if (unsigned (term_pipe[0]) >= limit)
|
|
limit = term_pipe[0] + 1;
|
|
}
|
|
|
|
for (auto iter = connections.begin ();
|
|
iter != connections.end (); ++iter)
|
|
if (auto *server = *iter)
|
|
{
|
|
int fd = -1;
|
|
switch (server->GetDirection ())
|
|
{
|
|
case Cody::Server::READING:
|
|
fd = server->GetFDRead ();
|
|
FD_SET (fd, &readers);
|
|
break;
|
|
case Cody::Server::WRITING:
|
|
fd = server->GetFDWrite ();
|
|
FD_SET (fd, &writers);
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
|
|
if (fd >= 0 && limit <= unsigned (fd))
|
|
limit = fd + 1;
|
|
}
|
|
|
|
#ifdef HAVE_PSELECT
|
|
event_count = pselect (limit, &readers, &writers, NULL, NULL, &mask);
|
|
#else
|
|
event_count = select (limit, &readers, &writers, NULL, NULL);
|
|
#endif
|
|
if (term_pipe && FD_ISSET (term_pipe[0], &readers))
|
|
{
|
|
/* Fake up an interrupted system call. */
|
|
event_count = -1;
|
|
errno = EINTR;
|
|
}
|
|
#endif
|
|
}
|
|
|
|
if (event_count < 0)
|
|
{
|
|
// Error in waiting
|
|
if (errno == EINTR)
|
|
{
|
|
flag_noisy && noisy ("Interrupted wait");
|
|
eintr = true;
|
|
}
|
|
else
|
|
error ("cannot %s: %s", epoll_fd >= 0 ? "epoll_wait"
|
|
#ifdef HAVE_PSELECT
|
|
: "pselect",
|
|
#else
|
|
: "select",
|
|
#endif
|
|
xstrerror (errno));
|
|
event_count = 0;
|
|
}
|
|
|
|
auto iter = connections.begin ();
|
|
while (event_count--)
|
|
{
|
|
// Process an event
|
|
int active = -2;
|
|
|
|
if (epoll_fd >= 0)
|
|
{
|
|
#ifdef HAVE_EPOLL
|
|
/* See PR c++/88664 for why a temporary is used. */
|
|
unsigned data = events[event_count].data.u32;
|
|
active = int (data) - 1;
|
|
#endif
|
|
}
|
|
else
|
|
{
|
|
for (; iter != connections.end (); ++iter)
|
|
if (auto *server = *iter)
|
|
{
|
|
bool found = false;
|
|
switch (server->GetDirection ())
|
|
{
|
|
#if defined (HAVE_PSELECT) || defined (HAVE_SELECT)
|
|
case Cody::Server::READING:
|
|
found = FD_ISSET (server->GetFDRead (), &readers);
|
|
break;
|
|
case Cody::Server::WRITING:
|
|
found = FD_ISSET (server->GetFDWrite (), &writers);
|
|
break;
|
|
#endif
|
|
default:
|
|
break;
|
|
}
|
|
|
|
if (found)
|
|
{
|
|
active = iter - connections.begin ();
|
|
++iter;
|
|
break;
|
|
}
|
|
}
|
|
|
|
#if defined (HAVE_PSELECT) || defined (HAVE_SELECT)
|
|
if (active < 0 && sock_fd >= 0 && FD_ISSET (sock_fd, &readers))
|
|
active = -1;
|
|
#endif
|
|
}
|
|
|
|
if (active >= 0)
|
|
{
|
|
// Do the action
|
|
auto *server = connections[active];
|
|
if (process_server (server, active, epoll_fd))
|
|
{
|
|
connections[active] = nullptr;
|
|
close_server (server, epoll_fd);
|
|
live--;
|
|
if (flag_sequential)
|
|
my_epoll_ctl (epoll_fd, EPOLL_CTL_ADD, EPOLLIN, sock_fd, 0);
|
|
}
|
|
}
|
|
else if (active == -1 && !eintr)
|
|
{
|
|
// New connection
|
|
int fd = open_server (ipv6, sock_fd);
|
|
if (fd >= 0)
|
|
{
|
|
#if !defined (HAVE_ACCEPT4) \
|
|
&& (defined (HAVE_EPOLL) || defined (HAVE_PSELECT) || defined (HAVE_SELECT))
|
|
int flags = fcntl (fd, F_GETFL, 0);
|
|
fcntl (fd, F_SETFL, flags | O_NONBLOCK);
|
|
#endif
|
|
auto *server = new Cody::Server (resolver, fd);
|
|
|
|
unsigned slot = connections.size ();
|
|
if (live == slot)
|
|
connections.push_back (server);
|
|
else
|
|
for (auto iter = connections.begin (); ; ++iter)
|
|
if (!*iter)
|
|
{
|
|
*iter = server;
|
|
slot = iter - connections.begin ();
|
|
break;
|
|
}
|
|
live++;
|
|
my_epoll_ctl (epoll_fd, EPOLL_CTL_ADD, EPOLLIN, fd, slot + 1);
|
|
}
|
|
}
|
|
|
|
if (sock_fd >= 0
|
|
&& (term || (live && (flag_one || flag_sequential))))
|
|
{
|
|
/* Stop paying attention to sock_fd. */
|
|
my_epoll_ctl (epoll_fd, EPOLL_CTL_DEL, EPOLLIN, sock_fd, 0);
|
|
if (flag_one || term)
|
|
{
|
|
close (sock_fd);
|
|
sock_fd = -1;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
#if defined (HAVE_EPOLL) || defined (HAVE_PSELECT) || defined (HAVE_SELECT)
|
|
/* Restore the signal mask. */
|
|
sigprocmask (SIG_SETMASK, &mask, NULL);
|
|
#endif
|
|
|
|
gcc_assert (sock_fd < 0);
|
|
if (epoll_fd >= 0)
|
|
close (epoll_fd);
|
|
|
|
if (term_pipe && term_pipe[0] >= 0)
|
|
{
|
|
close (term_pipe[0]);
|
|
close (term_pipe[1]);
|
|
}
|
|
}
|
|
|
|
#endif
|
|
|
|
static int maybe_parse_socket (std::string &option, module_resolver *r)
|
|
{
|
|
/* Local or ipv6 address. */
|
|
auto last = option.find_last_of ('?');
|
|
if (last != option.npos)
|
|
{
|
|
r->set_ident (option.c_str () + last + 1);
|
|
option.erase (last);
|
|
}
|
|
int fd = -2;
|
|
char const *errmsg = nullptr;
|
|
|
|
/* Does it look like a socket? */
|
|
if (option[0] == '=')
|
|
{
|
|
/* A local socket. */
|
|
#if CODY_NETWORKING
|
|
fd = Cody::ListenLocal (&errmsg, option.c_str () + 1);
|
|
#endif
|
|
}
|
|
else
|
|
{
|
|
auto colon = option.find_last_of (':');
|
|
if (colon != option.npos)
|
|
{
|
|
/* Try a hostname:port address. */
|
|
char const *cptr = option.c_str () + colon;
|
|
char *endp;
|
|
unsigned port = strtoul (cptr + 1, &endp, 10);
|
|
|
|
if (port && endp != cptr + 1 && !*endp)
|
|
{
|
|
/* Ends in ':number', treat as ipv6 domain socket. */
|
|
option.erase (colon);
|
|
#if CODY_NETWORKING
|
|
fd = Cody::ListenInet6 (&errmsg, option.c_str (), port);
|
|
#endif
|
|
}
|
|
}
|
|
}
|
|
|
|
if (errmsg)
|
|
error ("failed to open socket: %s", errmsg);
|
|
|
|
return fd;
|
|
}
|
|
|
|
int
|
|
main (int argc, char *argv[])
|
|
{
|
|
const char *p = argv[0] + strlen (argv[0]);
|
|
while (p != argv[0] && !IS_DIR_SEPARATOR (p[-1]))
|
|
--p;
|
|
progname = p;
|
|
|
|
#ifdef SIGSEGV
|
|
signal (SIGSEGV, crash_signal);
|
|
#endif
|
|
#ifdef SIGILL
|
|
signal (SIGILL, crash_signal);
|
|
#endif
|
|
#ifdef SIGBUS
|
|
signal (SIGBUS, crash_signal);
|
|
#endif
|
|
#ifdef SIGABRT
|
|
signal (SIGABRT, crash_signal);
|
|
#endif
|
|
#ifdef SIGFPE
|
|
signal (SIGFPE, crash_signal);
|
|
#endif
|
|
#ifdef SIGPIPE
|
|
/* Ignore sigpipe, so read/write get an error. */
|
|
signal (SIGPIPE, SIG_IGN);
|
|
#endif
|
|
#if NETWORKING
|
|
#ifdef SIGINT
|
|
signal (SIGINT, kill_signal);
|
|
#endif
|
|
#endif
|
|
|
|
int argno = process_args (argc, argv);
|
|
|
|
std::string name;
|
|
int sock_fd = -1; /* Socket fd, otherwise stdin/stdout. */
|
|
module_resolver r (flag_map, flag_xlate);
|
|
|
|
if (argno != argc)
|
|
{
|
|
name = argv[argno];
|
|
sock_fd = maybe_parse_socket (name, &r);
|
|
if (!name.empty ())
|
|
argno++;
|
|
}
|
|
|
|
if (argno != argc)
|
|
for (; argno != argc; argno++)
|
|
{
|
|
std::string option = argv[argno];
|
|
char const *prefix = nullptr;
|
|
auto ident = option.find_last_of ('?');
|
|
if (ident != option.npos)
|
|
{
|
|
prefix = option.c_str () + ident + 1;
|
|
option[ident] = 0;
|
|
}
|
|
int fd = open (option.c_str (), O_RDONLY | O_CLOEXEC);
|
|
int err = 0;
|
|
if (fd < 0)
|
|
err = errno;
|
|
else
|
|
{
|
|
err = r.read_tuple_file (fd, prefix, false);
|
|
close (fd);
|
|
}
|
|
|
|
if (err)
|
|
error ("failed reading '%s': %s", option.c_str (), xstrerror (err));
|
|
}
|
|
else
|
|
r.set_default_map (true);
|
|
|
|
if (flag_root)
|
|
r.set_repo (flag_root);
|
|
|
|
#ifdef HAVE_AF_INET6
|
|
netmask_set_t::iterator end = netmask_set.end ();
|
|
for (netmask_set_t::iterator iter = netmask_set.begin ();
|
|
iter != end; ++iter)
|
|
{
|
|
netmask_vec_t::iterator e = accept_addrs.end ();
|
|
for (netmask_vec_t::iterator i = accept_addrs.begin (); i != e; ++i)
|
|
if (i->includes (iter->addr))
|
|
goto present;
|
|
accept_addrs.push_back (*iter);
|
|
present:;
|
|
}
|
|
#endif
|
|
|
|
#if NETWORKING
|
|
if (sock_fd >= 0)
|
|
{
|
|
server (name[0] != '=', sock_fd, &r);
|
|
if (name[0] == '=')
|
|
unlink (name.c_str () + 1);
|
|
}
|
|
else
|
|
#endif
|
|
{
|
|
auto server = Cody::Server (&r, 0, 1);
|
|
|
|
int err = 0;
|
|
for (;;)
|
|
{
|
|
server.PrepareToRead ();
|
|
while ((err = server.Read ()))
|
|
{
|
|
if (err == EINTR || err == EAGAIN)
|
|
continue;
|
|
goto done;
|
|
}
|
|
|
|
server.ProcessRequests ();
|
|
|
|
server.PrepareToWrite ();
|
|
while ((err = server.Write ()))
|
|
{
|
|
if (err == EINTR || err == EAGAIN)
|
|
continue;
|
|
goto done;
|
|
}
|
|
}
|
|
done:;
|
|
if (err > 0)
|
|
error ("communication error:%s", xstrerror (err));
|
|
}
|
|
|
|
return 0;
|
|
}
|