diff options
author | roberto <roberto@FreeBSD.org> | 2008-08-17 17:37:33 +0000 |
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committer | roberto <roberto@FreeBSD.org> | 2008-08-17 17:37:33 +0000 |
commit | 4ded1c1fa0bc21c61f91a2dbe864835986745121 (patch) | |
tree | 16d100fbc9dae63888d48b464e471ba0e5065193 /contrib/ntp/libntp/iosignal.c | |
parent | 8b5a86d4fda08a9c68231415812edcb26be52f79 (diff) | |
download | FreeBSD-src-4ded1c1fa0bc21c61f91a2dbe864835986745121.zip FreeBSD-src-4ded1c1fa0bc21c61f91a2dbe864835986745121.tar.gz |
Flatten the dist and various 4.n.n trees in preparation of future ntp imports.
Diffstat (limited to 'contrib/ntp/libntp/iosignal.c')
-rw-r--r-- | contrib/ntp/libntp/iosignal.c | 544 |
1 files changed, 0 insertions, 544 deletions
diff --git a/contrib/ntp/libntp/iosignal.c b/contrib/ntp/libntp/iosignal.c deleted file mode 100644 index bcad890..0000000 --- a/contrib/ntp/libntp/iosignal.c +++ /dev/null @@ -1,544 +0,0 @@ -/* - * iosignal.c - input/output routines for ntpd. The socket-opening code - * was shamelessly stolen from ntpd. - */ - -#include "ntp_machine.h" -#include "ntpd.h" -#include "ntp_io.h" -#include "ntp_if.h" -#include "ntp_stdlib.h" -#include "iosignal.h" - -#include <stdio.h> -#include <signal.h> -#ifdef HAVE_SYS_PARAM_H -# include <sys/param.h> -#endif /* HAVE_SYS_PARAM_H */ -#ifdef HAVE_SYS_IOCTL_H -# include <sys/ioctl.h> -#endif - -#include <arpa/inet.h> - -#if _BSDI_VERSION >= 199510 -# include <ifaddrs.h> -#endif - -#if defined(HAVE_SIGNALED_IO) -static int sigio_block_count = 0; -# if defined(HAVE_SIGACTION) -/* - * If sigaction() is used for signal handling and a signal is - * pending then the kernel blocks the signal before it calls - * the signal handler. - * - * The variable below is used to take care that the SIGIO signal - * is not unintentionally unblocked inside the sigio_handler() - * if the handler executes a piece of code that is normally - * bracketed by BLOCKIO()/UNBLOCKIO() calls. - */ -static int sigio_handler_active = 0; -# endif -extern void input_handler P((l_fp *)); - -/* - * SIGPOLL and SIGIO ROUTINES. - */ - - /* - * Some systems (MOST) define SIGPOLL == SIGIO, others SIGIO == SIGPOLL, and - * a few have separate SIGIO and SIGPOLL signals. This code checks for the - * SIGIO == SIGPOLL case at compile time. - * Do not define USE_SIGPOLL or USE_SIGIO. - * these are interal only to iosignal.c! - */ -# if defined(USE_SIGPOLL) -# undef USE_SIGPOLL -# endif -# if defined(USE_SIGIO) -# undef USE_SIGIO -# endif - -# if defined(USE_TTY_SIGPOLL) || defined(USE_UDP_SIGPOLL) -# define USE_SIGPOLL -# endif - -# if !defined(USE_TTY_SIGPOLL) || !defined(USE_UDP_SIGPOLL) -# define USE_SIGIO -# endif - -# ifdef __QNXNTO__ -# include <fcntl.h> -# include <unix.h> -# define FNDELAY O_NDELAY -# endif - -# if defined(USE_SIGIO) && defined(USE_SIGPOLL) -# if SIGIO == SIGPOLL -# define USE_SIGIO -# undef USE_SIGPOLL -# endif /* SIGIO == SIGPOLL */ -# endif /* USE_SIGIO && USE_SIGIO */ - - -/* - * TTY initialization routines. - */ -int -init_clock_sig( - struct refclockio *rio - ) -{ -# ifdef USE_TTY_SIGPOLL - { - /* DO NOT ATTEMPT TO MAKE CLOCK-FD A CTTY: not portable, unreliable */ - if (ioctl(rio->fd, I_SETSIG, S_INPUT) < 0) - { - msyslog(LOG_ERR, - "init_clock_sig: ioctl(I_SETSIG, S_INPUT) failed: %m"); - return 1; - } - return 0; - } -# else - /* - * Special cases first! - */ - /* Was: defined(SYS_HPUX) */ -# if defined(FIOSSAIOOWN) && defined(FIOSNBIO) && defined(FIOSSAIOSTAT) -#define CLOCK_DONE - { - int pgrp, on = 1; - - /* DO NOT ATTEMPT TO MAKE CLOCK-FD A CTTY: not portable, unreliable */ - pgrp = getpid(); - if (ioctl(rio->fd, FIOSSAIOOWN, (char *)&pgrp) == -1) - { - msyslog(LOG_ERR, "ioctl(FIOSSAIOOWN) fails for clock I/O: %m"); - exit(1); - /*NOTREACHED*/ - } - - /* - * set non-blocking, async I/O on the descriptor - */ - if (ioctl(rio->fd, FIOSNBIO, (char *)&on) == -1) - { - msyslog(LOG_ERR, "ioctl(FIOSNBIO) fails for clock I/O: %m"); - exit(1); - /*NOTREACHED*/ - } - - if (ioctl(rio->fd, FIOSSAIOSTAT, (char *)&on) == -1) - { - msyslog(LOG_ERR, "ioctl(FIOSSAIOSTAT) fails for clock I/O: %m"); - exit(1); - /*NOTREACHED*/ - } - return 0; - } -# endif /* SYS_HPUX: FIOSSAIOOWN && FIOSNBIO && FIOSSAIOSTAT */ - /* Was: defined(SYS_AIX) && !defined(_BSD) */ -# if !defined(_BSD) && defined(_AIX) && defined(FIOASYNC) && defined(FIOSETOWN) - /* - * SYSV compatibility mode under AIX. - */ -#define CLOCK_DONE - { - int pgrp, on = 1; - - /* DO NOT ATTEMPT TO MAKE CLOCK-FD A CTTY: not portable, unreliable */ - if (ioctl(rio->fd, FIOASYNC, (char *)&on) == -1) - { - msyslog(LOG_ERR, "ioctl(FIOASYNC) fails for clock I/O: %m"); - return 1; - } - pgrp = -getpid(); - if (ioctl(rio->fd, FIOSETOWN, (char*)&pgrp) == -1) - { - msyslog(LOG_ERR, "ioctl(FIOSETOWN) fails for clock I/O: %m"); - return 1; - } - - if (fcntl(rio->fd, F_SETFL, FNDELAY|FASYNC) < 0) - { - msyslog(LOG_ERR, "fcntl(FNDELAY|FASYNC) fails for clock I/O: %m"); - return 1; - } - return 0; - } -# endif /* AIX && !BSD: !_BSD && FIOASYNC && FIOSETOWN */ -# ifndef CLOCK_DONE - { - /* DO NOT ATTEMPT TO MAKE CLOCK-FD A CTTY: not portable, unreliable */ -# if defined(TIOCSCTTY) && defined(USE_FSETOWNCTTY) - /* - * there are, however, always exceptions to the rules - * one is, that OSF accepts SETOWN on TTY fd's only, iff they are - * CTTYs. SunOS and HPUX do not semm to have this restriction. - * another question is: how can you do multiple SIGIO from several - * ttys (as they all should be CTTYs), wondering... - * - * kd 95-07-16 - */ - if (ioctl(rio->fd, TIOCSCTTY, 0) == -1) - { - msyslog(LOG_ERR, "ioctl(TIOCSCTTY, 0) fails for clock I/O: %m"); - return 1; - } -# endif /* TIOCSCTTY && USE_FSETOWNCTTY */ - - if (fcntl(rio->fd, F_SETOWN, getpid()) == -1) - { - msyslog(LOG_ERR, "fcntl(F_SETOWN) fails for clock I/O: %m"); - return 1; - } - - if (fcntl(rio->fd, F_SETFL, FNDELAY|FASYNC) < 0) - { - msyslog(LOG_ERR, - "fcntl(FNDELAY|FASYNC) fails for clock I/O: %m"); - return 1; - } - return 0; - } -# endif /* CLOCK_DONE */ -# endif /* !USE_TTY_SIGPOLL */ -} - - - -void -init_socket_sig( - int fd - ) -{ -# ifdef USE_UDP_SIGPOLL - { - if (ioctl(fd, I_SETSIG, S_INPUT) < 0) - { - msyslog(LOG_ERR, - "init_socket_sig: ioctl(I_SETSIG, S_INPUT) failed: %m"); - exit(1); - } - } -# else /* USE_UDP_SIGPOLL */ - { - int pgrp; -# ifdef FIOASYNC - int on = 1; -# endif - -# if defined(FIOASYNC) - if (ioctl(fd, FIOASYNC, (char *)&on) == -1) - { - msyslog(LOG_ERR, "ioctl(FIOASYNC) fails: %m"); - exit(1); - /*NOTREACHED*/ - } -# elif defined(FASYNC) - { - int flags; - - if ((flags = fcntl(fd, F_GETFL, 0)) == -1) - { - msyslog(LOG_ERR, "fcntl(F_GETFL) fails: %m"); - exit(1); - /*NOTREACHED*/ - } - if (fcntl(fd, F_SETFL, flags|FASYNC) < 0) - { - msyslog(LOG_ERR, "fcntl(...|FASYNC) fails: %m"); - exit(1); - /*NOTREACHED*/ - } - } -# else -# include "Bletch: Need asynchronous I/O!" -# endif - -# ifdef UDP_BACKWARDS_SETOWN - pgrp = -getpid(); -# else - pgrp = getpid(); -# endif - -# if defined(SIOCSPGRP) - if (ioctl(fd, SIOCSPGRP, (char *)&pgrp) == -1) - { - msyslog(LOG_ERR, "ioctl(SIOCSPGRP) fails: %m"); - exit(1); - /*NOTREACHED*/ - } -# elif defined(FIOSETOWN) - if (ioctl(fd, FIOSETOWN, (char*)&pgrp) == -1) - { - msyslog(LOG_ERR, "ioctl(FIOSETOWN) fails: %m"); - exit(1); - /*NOTREACHED*/ - } -# elif defined(F_SETOWN) - if (fcntl(fd, F_SETOWN, pgrp) == -1) - { - msyslog(LOG_ERR, "fcntl(F_SETOWN) fails: %m"); - exit(1); - /*NOTREACHED*/ - } -# else -# include "Bletch: Need to set process(group) to receive SIG(IO|POLL)" -# endif - } -# endif /* USE_UDP_SIGPOLL */ -} - -RETSIGTYPE -sigio_handler( - int sig - ) -{ - int saved_errno = errno; - l_fp ts; - - get_systime(&ts); - -# if defined(HAVE_SIGACTION) - sigio_handler_active++; - if (sigio_handler_active != 1) /* This should never happen! */ - msyslog(LOG_ERR, "sigio_handler: sigio_handler_active != 1"); -# endif - - (void)input_handler(&ts); - -# if defined(HAVE_SIGACTION) - sigio_handler_active--; - if (sigio_handler_active != 0) /* This should never happen! */ - msyslog(LOG_ERR, "sigio_handler: sigio_handler_active != 0"); -# endif - - errno = saved_errno; -} - -/* - * Signal support routines. - */ -# ifdef HAVE_SIGACTION -void -set_signal(void) -{ -# ifdef USE_SIGIO - (void) signal_no_reset(SIGIO, sigio_handler); -# endif -# ifdef USE_SIGPOLL - (void) signal_no_reset(SIGPOLL, sigio_handler); -# endif -} - -void -block_io_and_alarm(void) -{ - sigset_t set; - - if (sigemptyset(&set)) - msyslog(LOG_ERR, "block_io_and_alarm: sigemptyset() failed: %m"); -# if defined(USE_SIGIO) - if (sigaddset(&set, SIGIO)) - msyslog(LOG_ERR, "block_io_and_alarm: sigaddset(SIGIO) failed: %m"); -# endif -# if defined(USE_SIGPOLL) - if (sigaddset(&set, SIGPOLL)) - msyslog(LOG_ERR, "block_io_and_alarm: sigaddset(SIGPOLL) failed: %m"); -# endif - if (sigaddset(&set, SIGALRM)) - msyslog(LOG_ERR, "block_io_and_alarm: sigaddset(SIGALRM) failed: %m"); - - if (sigprocmask(SIG_BLOCK, &set, NULL)) - msyslog(LOG_ERR, "block_io_and_alarm: sigprocmask() failed: %m"); -} - -void -block_sigio(void) -{ - if ( sigio_handler_active == 0 ) /* not called from within signal handler */ - { - sigset_t set; - - ++sigio_block_count; - if (sigio_block_count > 1) - msyslog(LOG_INFO, "block_sigio: sigio_block_count > 1"); - if (sigio_block_count < 1) - msyslog(LOG_INFO, "block_sigio: sigio_block_count < 1"); - - if (sigemptyset(&set)) - msyslog(LOG_ERR, "block_sigio: sigemptyset() failed: %m"); -# if defined(USE_SIGIO) - if (sigaddset(&set, SIGIO)) - msyslog(LOG_ERR, "block_sigio: sigaddset(SIGIO) failed: %m"); -# endif -# if defined(USE_SIGPOLL) - if (sigaddset(&set, SIGPOLL)) - msyslog(LOG_ERR, "block_sigio: sigaddset(SIGPOLL) failed: %m"); -# endif - - if (sigprocmask(SIG_BLOCK, &set, NULL)) - msyslog(LOG_ERR, "block_sigio: sigprocmask() failed: %m"); - } -} - -void -unblock_io_and_alarm(void) -{ - sigset_t unset; - - if (sigemptyset(&unset)) - msyslog(LOG_ERR, "unblock_io_and_alarm: sigemptyset() failed: %m"); - -# if defined(USE_SIGIO) - if (sigaddset(&unset, SIGIO)) - msyslog(LOG_ERR, "unblock_io_and_alarm: sigaddset(SIGIO) failed: %m"); -# endif -# if defined(USE_SIGPOLL) - if (sigaddset(&unset, SIGPOLL)) - msyslog(LOG_ERR, "unblock_io_and_alarm: sigaddset(SIGPOLL) failed: %m"); -# endif - if (sigaddset(&unset, SIGALRM)) - msyslog(LOG_ERR, "unblock_io_and_alarm: sigaddset(SIGALRM) failed: %m"); - - if (sigprocmask(SIG_UNBLOCK, &unset, NULL)) - msyslog(LOG_ERR, "unblock_io_and_alarm: sigprocmask() failed: %m"); -} - -void -unblock_sigio(void) -{ - if ( sigio_handler_active == 0 ) /* not called from within signal handler */ - { - sigset_t unset; - - --sigio_block_count; - if (sigio_block_count > 0) - msyslog(LOG_INFO, "unblock_sigio: sigio_block_count > 0"); - if (sigio_block_count < 0) - msyslog(LOG_INFO, "unblock_sigio: sigio_block_count < 0"); - - if (sigemptyset(&unset)) - msyslog(LOG_ERR, "unblock_sigio: sigemptyset() failed: %m"); - -# if defined(USE_SIGIO) - if (sigaddset(&unset, SIGIO)) - msyslog(LOG_ERR, "unblock_sigio: sigaddset(SIGIO) failed: %m"); -# endif -# if defined(USE_SIGPOLL) - if (sigaddset(&unset, SIGPOLL)) - msyslog(LOG_ERR, "unblock_sigio: sigaddset(SIGPOLL) failed: %m"); -# endif - - if (sigprocmask(SIG_UNBLOCK, &unset, NULL)) - msyslog(LOG_ERR, "unblock_sigio: sigprocmask() failed: %m"); - } -} - -void -wait_for_signal(void) -{ - sigset_t old; - - if (sigprocmask(SIG_UNBLOCK, NULL, &old)) - msyslog(LOG_ERR, "wait_for_signal: sigprocmask() failed: %m"); - -# if defined(USE_SIGIO) - if (sigdelset(&old, SIGIO)) - msyslog(LOG_ERR, "wait_for_signal: sigdelset(SIGIO) failed: %m"); -# endif -# if defined(USE_SIGPOLL) - if (sigdelset(&old, SIGPOLL)) - msyslog(LOG_ERR, "wait_for_signal: sigdelset(SIGPOLL) failed: %m"); -# endif - if (sigdelset(&old, SIGALRM)) - msyslog(LOG_ERR, "wait_for_signal: sigdelset(SIGALRM) failed: %m"); - - if (sigsuspend(&old) && (errno != EINTR)) - msyslog(LOG_ERR, "wait_for_signal: sigsuspend() failed: %m"); -} - -# else /* !HAVE_SIGACTION */ -/* - * Must be an old bsd system. - * We assume there is no SIGPOLL. - */ - -void -block_io_and_alarm(void) -{ - int mask; - - mask = sigmask(SIGIO) | sigmask(SIGALRM); - if (sigblock(mask)) - msyslog(LOG_ERR, "block_io_and_alarm: sigblock() failed: %m"); -} - -void -block_sigio(void) -{ - int mask; - - ++sigio_block_count; - if (sigio_block_count > 1) - msyslog(LOG_INFO, "block_sigio: sigio_block_count > 1"); - if (sigio_block_count < 1) - msyslog(LOG_INFO, "block_sigio: sigio_block_count < 1"); - - mask = sigmask(SIGIO); - if (sigblock(mask)) - msyslog(LOG_ERR, "block_sigio: sigblock() failed: %m"); -} - -void -set_signal(void) -{ - (void) signal_no_reset(SIGIO, sigio_handler); -} - -void -unblock_io_and_alarm(void) -{ - int mask, omask; - - mask = sigmask(SIGIO) | sigmask(SIGALRM); - omask = sigblock(0); - omask &= ~mask; - (void) sigsetmask(omask); -} - -void -unblock_sigio(void) -{ - int mask, omask; - - --sigio_block_count; - if (sigio_block_count > 0) - msyslog(LOG_INFO, "unblock_sigio: sigio_block_count > 0"); - if (sigio_block_count < 0) - msyslog(LOG_INFO, "unblock_sigio: sigio_block_count < 0"); - mask = sigmask(SIGIO); - omask = sigblock(0); - omask &= ~mask; - (void) sigsetmask(omask); -} - -void -wait_for_signal(void) -{ - int mask, omask; - - mask = sigmask(SIGIO) | sigmask(SIGALRM); - omask = sigblock(0); - omask &= ~mask; - if (sigpause(omask) && (errno != EINTR)) - msyslog(LOG_ERR, "wait_for_signal: sigspause() failed: %m"); -} - -# endif /* HAVE_SIGACTION */ -#else -int NotAnEmptyCompilationUnit; -#endif |