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/usr/share/doc/socat-1.7.3.2/

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BUGREPORTS	0.729 KB	-rw-r--r--	2016-07-21 21:28	R E G D
CHANGES	53.126 KB	-rw-r--r--	2017-08-04 04:56	R E G D
COPYING	17.668 KB	-rw-r--r--	2017-01-06 19:28	R E G D
COPYING.OpenSSL	6.132 KB	-rw-r--r--	2016-07-21 21:28	R E G D
DEVELOPMENT	8.289 KB	-rw-r--r--	2017-01-06 19:28	R E G D
EXAMPLES	16.466 KB	-rw-r--r--	2016-07-21 21:28	R E G D
FAQ	3.827 KB	-rw-r--r--	2016-07-21 21:28	R E G D
PORTING	3.022 KB	-rw-r--r--	2016-07-21 21:28	R E G D
README	11.373 KB	-rw-r--r--	2017-01-06 19:28	R E G D
SECURITY	1.806 KB	-rw-r--r--	2016-07-21 21:28	R E G D
daemon.sh	0.882 KB	-rwxr-xr-x	2017-01-06 20:58	R E G D
ftp.sh	4.119 KB	-rwxr-xr-x	2017-01-06 20:58	R E G D
gatherinfo.sh	4.025 KB	-rwxr-xr-x	2017-01-06 20:58	R E G D
mail.sh	2.018 KB	-rwxr-xr-x	2017-01-06 20:58	R E G D
proxy.sh	1.981 KB	-rwxr-xr-x	2017-01-06 20:58	R E G D
proxyecho.sh	1.189 KB	-rwxr-xr-x	2017-01-06 20:58	R E G D
readline-test.sh	1.248 KB	-rwxr-xr-x	2017-01-06 20:58	R E G D
readline.sh	0.673 KB	-rwxr-xr-x	2017-01-06 20:58	R E G D
socat_buildscript_for_android.sh	3.495 KB	-rwxr-xr-x	2017-01-06 19:28	R E G D
socks4a-echo.sh	2.513 KB	-rwxr-xr-x	2017-01-06 20:58	R E G D
socks4echo.sh	2.304 KB	-rwxr-xr-x	2017-01-06 20:58	R E G D
test.sh	390.769 KB	-rwxr-xr-x	2017-08-04 04:56	R E G D
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####################### V 1.7.3.2: corrections: SIGSEGV and other signals could lead to a 100% CPU loop Failing name resolution could lead to SIGSEGV Thanks to Max for reporting this issue. Include for ptrdiff_t Thanks to Jeroen Roovers for reporting this issue. Building with --disable-sycls failed due to missing sslcls.h defines Socat hung when configured with --disable-sycls. Some minor corrections with includes etc. Option so-reuseport did not work. Thanks to Some Raghavendra Prabhu for sending a patch. Programs invoked with EXEC, nofork, and -u or -U had stdin and stdout incorrectly assigned Test: EXEC_NOFORK_UNIDIR Thanks to David Reiss for reporting this problem. Socat exited with status 0 even when a program invoked with SYSTEM or EXEC failed. Tests: SYSTEM_RC EXEC_RC Issue reported by Felix Winkelmann. AddressSanitizer reported a few buffer overflows (false positives). Nevertheless fixed Socat source. Issue reported by Hanno Böck. Socat did not use option ipv6-join-group. Test: USE_IPV6_JOIN_GROUP Thanks to Linux Lüssing for sending a patch. UDP-LISTEN did not honor the max-children option. Test: UDP4MAXCHILDREN UDP6MAXCHILDREN Thanks to Leander Berwers for reporting this issue. Options so-rcvtimeo and so-sndtimeo do not work with poll()/select() and therefore were useless. Thanks to Steve Borenstein for reporting this issue. Option dhparam was documented as dhparams. Added the alias name dhparams to fix this. Thanks to Alexander Neumann for sending a patch. Options shut-down and shut-close did not work. Thanks to Stefan Schimanski for providing a patch. There was a bug in printing readline log message caused by a misleading indentation. Thanks to Paul Wouters for reporting. The internal vsnprintf_r function looped or crashed on size parameter with hexadecimal output. Ignore exit code of child process when it was killed by master due to EOF Corrected byte order on read of IPV6_TCLASS value from ancillary message Fixed type of the bool element in options. This had bug caused failures e.g. of ignoreeof on big-endian systems when bool was not based on int. On systems with predefined bool type whose size differs from int some IPv6 and TCP options (per setsockopt()) failed. Length of integral data in ancillary messages varies (TOS: 1 byte, TTL: 4 bytes), the old implementation failed for TTL on big-endian hosts. Fixed an issue in options processing: TUN and DNS flags had failed on big-endian systems and the NO- forms had probable never worked. porting: Type conflict between int and sig_atomic_t between declaration and definition of diag_immediate_type and diag_immediate_exit broke compilation on FreeBSD 10.1 with clang. Thanks to Emanuel Haupt for reporting this bug. Socat failed to compile on platforms with OpenSSL without DTLSv1_client_method or DTLSv1_server_method. Thanks to Simon Matter for sending a patch. NuttX OS headers do not provide struct ip, thus socat did not compile. Made struct ip subject to configure. Thanks to SP for reporting this issue. Socat failed to compile with OpenSSL version 1.0.2d where SSLv3_server_method and SSLv3_client_method are no longer defined. Thanks to Mischa ter Smitten for reporting this issue and providing a patch. configure checked for OpenSSL EC_KEY assuming it is a define but it is a type, thus OpenSSL ECDHE ciphers failed even on Linux. Thanks to Andrey Arapov for reporting this bug. Changes to make socat compile with OpenSSL 1.1. Thanks to Sebastian Andrzej Siewior e.a. from the Debian team for providing the base patch. Debian Bug#828550 Make Socat compatible with BoringSSL. Thanks to Matt Braithwaite for providing a patch. OpenSSL: Use RAND_status to determine PRNG state Thanks to Adam Langley for providing a patch AIX-7 uses an extended O_ACCMODE that does not fit socat's internal requirements. Thanks to Garrick Trowsdale for providing a patch LibreSSL support: check for OPENSSL_NO_COMP Thanks to Bernard Spil for providing a patch testing: socks4echo.sh and socks4a-echo.sh hung with new bash with read -n test.sh: stderr; option -v (verbose); FDOUT_ERROR description improved proxy.sh - it now also takes hostnames A few corrections in test.sh DTLS1 test hangs on some distributions. Test is now only performed with OpenSSL 1.0.2 or higher. More corrections to test.sh that reveal a mistake with IPV6_TCLASS docu: Corrected source of socat man page to correctly show man references like socket(2); removed obseolete entries from See Also Docu and some comments mentioned addresses SSL-LISTEN and SSL-CONNECT that do not exist (OPENSSL-LISTEN, SSL-L; and OPENNSSL-CONNECT, SSL are correct). Thanks to Zhigang Wang for reporting this issue. Fixed a couple of English spelling and grammar mistakes. Thanks to Jakub Wild for sending the patches. NOEXPAND() was not resolved 2 times. More minor docu corrections legal: Added contributors to copyright notices. Suggested by Matt Braithwaite. ####################### V 1.7.3.1: security: Socat security advisory 8 A stack overflow in vulnerability was found that can be triggered when command line arguments (complete address specifications, host names, file names) are longer than 512 bytes. Successful exploitation might allow an attacker to execute arbitrary code with the privileges of the socat process. This vulnerability can only be exploited when an attacker is able to inject data into socat's command line. A vulnerable scenario would be a CGI script that reads data from clients and uses (parts of) this data as hostname for a Socat invocation. Test: NESTEDOVFL Credits to Takumi Akiyama for finding and reporting this issue. Socat security advisory 7 MSVR-1499 In the OpenSSL address implementation the hard coded 1024 bit DH p parameter was not prime. The effective cryptographic strength of a key exchange using these parameters was weaker than the one one could get by using a prime p. Moreover, since there is no indication of how these parameters were chosen, the existence of a trapdoor that makes possible for an eavesdropper to recover the shared secret from a key exchange that uses them cannot be ruled out. Futhermore, 1024bit is not considered sufficiently secure. Fix: generated a new 2048bit prime. Thanks to Santiago Zanella-Beguelin and Microsoft Vulnerability Research (MSVR) for finding and reporting this issue. ####################### V 1.7.3.0: security: Socat security advisory 6 CVE-2015-1379: Possible DoS with fork Fixed problems with signal handling caused by use of not async signal safe functions in signal handlers that could freeze socat, allowing denial of service attacks. Many changes in signal handling and the diagnostic messages system were applied to make the code async signal safe but still provide detailled logging from signal handlers: Coded function vsnprintf_r() as async signal safe incomplete substitute of libc vsnprintf() Coded function snprinterr() to replace %m in strings with a system error message Instead of gettimeofday() use clock_gettime() when available Pass Diagnostic messages from signal handler per unix socket to the main program flow Use sigaction() instead of signal() for better control Turn off nested signal handler invocations Thanks to Peter Lobsinger for reporting and explaining this issue. Red Hat issue 1019975: add TLS host name checks OpenSSL client checks if the server certificates names in extensions/subjectAltName/DNS or in subject/commonName match the name used to connect or the value of the openssl-commonname option. Test: OPENSSL_CN_CLIENT_SECURITY OpenSSL server checks if the client certificates names in extensions/subjectAltNames/DNS or subject/commonName match the value of the openssl-commonname option when it is used. Test: OPENSSL_CN_SERVER_SECURITY Red Hat issue 1019964: socat now uses the system certificate store with OPENSSL when neither options cafile nor capath are used Red Hat issue 1019972: needs to specify OpenSSL cipher suites Default cipherlist is now "HIGH:-NULL:-PSK:-aNULL" instead of empty to prevent downgrade attacks new features: OpenSSL addresses set couple of environment variables from values in peer certificate, e.g.: SOCAT_OPENSSL_X509_SUBJECT, SOCAT_OPENSSL_X509_ISSUER, SOCAT_OPENSSL_X509_COMMONNAME, SOCAT_OPENSSL_X509V3_SUBJECTALTNAME_DNS Tests: ENV_OPENSSL_{CLIENT,SERVER}_X509_* Added support for methods TLSv1, TLSv1.1, TLSv1.2, and DTLS1 Tests: OPENSSL_METHOD_* Enabled OpenSSL server side use of ECDHE ciphers. Feature suggested by Andrey Arapov. Added a new option termios-rawer for ptys. Thanks to Christian Vogelgsang for pointing me to this requirement corrections: Bind with ABSTRACT commands used non-abstract namespace (Linux). Test: ABSTRACT_BIND Thanks to Denis Shatov for reporting this bug. Fixed return value of nestlex() Option ignoreeof on the right address hung. Test: IGNOREEOF_REV Thanks to Franz Fasching for reporting this bug. Address SYSTEM, when terminating, shut down its parent addresses, e.g. an SSL connection which the parent assumed to still be active. Test: SYSTEM_SHUTDOWN Passive (listening or receiving) addresses with empty port field bound to a random port instead of terminating with error. Test: TCP4_NOPORT configure with some combination of disable options produced config files that failed to compile due to missing IPPROTO_TCP. Thanks to Thierry Fournier for report and patch. fixed a few minor bugs with OpenSSL in configure and with messages Socat did not work in FIPS mode because 1024 instead of 512 bit DH prime is required. Thanks to Zhigang Wang for reporting and sending a patch. Christophe Leroy provided a patch that fixes memory leaks reported by valgrind Help for filan -L was bad, is now corrected to: "follow symbolic links instead of showing their properties" Address options fdin and fdout were silently ignored when not applicable due to -u or -U option. Now these combinations are caught as errors. Test: FDOUT_ERROR Issue reported by Hendrik. Added option termios-cfmakeraw that calls cfmakeraw() and is preferred over option raw which is now obsolote. On SysV systems this call is simulated by appropriate setting. Thanks to Youfu Zhang for reporting issue with option raw. porting: Socat included instead of POSIX Thanks to John Spencer for reporting this issue. Version 1.7.2.4 changed the check for gcc in configure.ac; this broke cross compiling. The particular check gets reverted. Thanks to Ross Burton and Danomi Manchego for reporting this issue. Debian Bug#764251: Set the build timestamp to a deterministic time: support external BUILD_DATE env var to allow to build reproducable binaries Joachim Fenkes provided an new adapted spec file. Type bool and macros Min and Max are defined by socat which led to compile errors when they were already provided by build framework. Thanks to Liyu Liu for providing a patch. David Arnstein contributed a patch for NetBSD 5.1 including stdbool.h support and appropriate files in Config/ Lauri Tirkkonen contributed a patch regarding netinet/if_ether.h on Illumos Changes for Openindiana: define _XPG4_2, __EXTENSIONS__, _POSIX_PTHREAD_SEMANTICS; and minor changes Red Hat issue 1182005: socat 1.7.2.4 build failure missing linux/errqueue.h Socat failed to compile on on PPC due to new requirements for including and a weakness in the conditional code. Thanks to Michel Normand for reporting this issue. doc: In the man page the PTY example was badly formatted. Thanks to J.F.Sebastian for sending a patch. Added missing CVE ids to security issues in CHANGES testing: Do not distribute testcert.conf with socat source but generate it (and new testcert6.conf) during test.sh run. ####################### V 1.7.2.4: corrections: LISTEN based addresses applied some address options, e.g. so-keepalive, to the listening file descriptor instead of the connected file descriptor Thanks to Ulises Alonso for reporting this bug make failed after configure with non gcc compiler due to missing include. Thanks to Horacio Mijail for reporting this problem configure checked for --disable-rawsocket but printed --disable-genericsocket in the help text. Thanks to Ben Gardiner for reporting and patching this bug In xioshutdown() a wrong branch was chosen after RECVFROM type addresses. Probably no impact. Thanks to David Binderman for reporting this issue. procan could not cleanly format ulimit values longer than 16 decimal digits. Thanks to Frank Dana for providing a patch that increases field width to 24 digits. OPENSSL-CONNECT with bind option failed on some systems, eg.FreeBSD, with "Invalid argument" Thanks to Emile den Tex for reporting this bug. Changed some variable definitions to make gcc -O2 aliasing checker happy Thanks to Ilya Gordeev for reporting these warnings On big endian platforms with type long >32bit the range option applied a bad base address. Thanks to hejia hejia for reporting and fixing this bug. Red Hat issue 1022070: missing length check in xiolog_ancillary_socket() Red Hat issue 1022063: out-of-range shifts on net mask bits Red Hat issue 1022062: strcpy misuse in xiosetsockaddrenv_ip4() Red Hat issue 1022048: strncpy hardening: corrected suspicious strncpy() uses Red Hat issue 1021958: fixed a bug with faulty buffer/data length calculation in xio-ascii.c:_xiodump() Red Hat issue 1021972: fixed a missing NUL termination in return string of sysutils.c:sockaddr_info() for the AF_UNIX case fixed some typos and minor issues, including: Red Hat issue 1021967: formatting error in manual page UNIX-LISTEN with fork option did not remove the socket file system entry when exiting. Other file system based passive address types had similar issues or failed to apply options umask, user e.a. Thanks to Lorenzo Monti for pointing me to this issue porting: Red Hat issue 1020203: configure checks fail with some compilers. Use case: clang Performed changes for Fedora release 19 Adapted, improved test.sh script Red Hat issue 1021429: getgroupent fails with large number of groups; use getgrouplist() when available instead of sequence of calls to getgrent() Red Hat issue 1021948: snprintf API change; Implemented xio_snprintf() function as wrapper that tries to emulate C99 behaviour on old glibc systems, and adapted all affected calls appropriately Mike Frysinger provided a patch that supports long long for time_t, socklen_t and a few other libc types. Artem Mygaiev extended Cedril Priscals Android build script with pty code The check for fips.h required stddef.h Thanks to Matt Hilt for reporting this issue and sending a patch Check for linux/errqueue.h failed on some systems due to lack of linux/types.h inclusion. Thanks to Michael Vastola for sending a patch. autoconf now prefers configure.ac over configure.in Thanks to Michael Vastola for sending a patch. type of struct cmsghdr.cmsg is system dependend, determine it with configure; some more print format corrections docu: libwrap always logs to syslog added actual text version of GPLv2 ####################### V 1.7.2.3: security: Socat security advisory 5 CVE-2014-0019: socats PROXY-CONNECT address was vulnerable to a buffer overflow with data from command line (see socat-secadv5.txt) Credits to Florian Weimer of the Red Hat Product Security Team ####################### V 1.7.2.2: security: Socat security advisory 4 CVE-2013-3571: after refusing a client connection due to bad source address or source port socat shutdown() the socket but did not close() it, resulting in a file descriptor leak in the listening process, visible with lsof and possibly resulting in EMFILE Too many open files. This issue could be misused for a denial of service attack. Full credits to Catalin Mitrofan for finding and reporting this issue. ####################### V 1.7.2.1: security: Socat security advisory 3 CVE-2012-0219: fixed a possible heap buffer overflow in the readline address. This bug could be exploited when all of the following conditions were met: 1) one of the addresses is READLINE without the noprompt and without the prompt options. 2) the other (almost arbitrary address) reads malicious data (which is then transferred by socat to READLINE). Workaround: when using the READLINE address apply option prompt or noprompt. Full credits to Johan Thillemann for finding and reporting this issue. ####################### V 1.7.2.0: corrections: when UNIX-LISTEN was applied to an existing file it failed as expected but removed the file. Thanks to Bjoern Bosselmann for reporting this problem fixed a bug where socat might crash when connecting to a unix domain socket using address GOPEN. Thanks to Martin Forssen for bug report and patch. UDP-LISTEN would alway set SO_REUSEADDR even without fork option and when user set it to 0. Thanks to Michal Svoboda for reporting this bug. UNIX-CONNECT did not support half-close. Thanks to Greg Hughes who pointed me to that bug TCP-CONNECT with option nonblock reported successful connect even when it was still pending address option ioctl-intp failed with "unimplemented type 26". Thanks to Jeremy W. Sherman for reporting and fixing that bug socat option -x did not print packet direction, timestamp etc; thanks to Anthony Sharobaiko for sending a patch address PTY does not take any parameters but did not report an error when some were given Marcus Meissner provided a patch that fixes invalid output and possible process crash when socat prints info about an unnamed unix domain socket Michal Soltys reported the following problem and provided an initial patch: when socat was interrupted, e.g. by SIGSTOP, and resumed during data transfer only parts of the data might have been written. Option o-nonblock in combination with large transfer block sizes may result in partial writes and/or EAGAIN errors that were not handled properly but resulted in data loss or process termination. Fixed a bug that could freeze socat when during assembly of a log message a signal was handled that also printed a log message. socat development had been aware that localtime() is not thread safe but had only expected broken messages, not corrupted stack (glibc 2.11.1, Ubuntu 10.4) an internal store for child pids was susceptible to pid reuse which could lead to sporadic data loss when both fork option and exec address were used. Thanks to Tetsuya Sodo for reporting this problem and sending a patch OpenSSL server failed with "no shared cipher" when using cipher aNULL. Fixed by providing temporary DH parameters. Thanks to Philip Rowlands for drawing my attention to this issue. UDP-LISTEN slept 1s after accepting a connection. This is not required. Thanks to Peter Valdemar Morch for reporting this issue fixed a bug that could lead to error or socat crash after a client connection with option retry had been established fixed configure.in bug on net/if.h check that caused IF_NAMESIZE to be undefined improved dev_t print format definition porting: Cedril Priscal ported socat to Android (using Googles cross compiler). The port includes the socat_buildscript_for_android.sh script added check for component ipi_spec_dst in struct in_pktinfo so compilation does not fail on Cygwin (thanks to Peter Wagemans for reporting this problem) build failed on RHEL6 due to presence of fips.h; configure now checks for fipsld too. Thanks to Andreas Gruenbacher for reporting this problem check for netinet6/in6.h only when IPv6 is available and enabled don't fail to compile when the following defines are missing: IPV6_PKTINFO IPV6_RTHDR IPV6_DSTOPTS IPV6_HOPOPTS IPV6_HOPLIMIT Thanks to Jerry Jacobs for reporting this problem (Mac OS X Lion 10.7) check if define __APPLE_USE_RFC_2292 helps to enable IPV6_* (MacOSX Lion 7.1); thanks to Jerry Jacobs to reporting this problem and proposing a solution fixed compiler warnings on Mac OS X 64bit. Thanks to Guy Harris for providing the patch. corrections for OpenEmbedded, especially termios SHIFT values and ISPEED/OSPEED. Thanks to John Faith for providing the patch minor corrections to docu and test.sh resulting from local compilation on Openmoko SHR fixed sa_family_t compile error on DragonFly. Thanks to Tony Young for reporting this issue and sending a patch. Ubuntu Oneiric: OpenSSL no longer provides SSLv2 functions; libutil.sh is now bsd/libutil.h; compiler warns on vars that is only written to new features: added option max-children that limits the number of concurrent child processes. Thanks to Sam Liddicott for providing the patch. Till Maas added support for tun/tap addresses without IP address added an option openssl-compress that allows to disable the compression feature of newer OpenSSL versions. Thanks to Michael Hanselmann for providing this contribution (sponsored by Google Inc.) docu: minor corrections in docu (thanks to Paggas) client process -> child process ####################### V 1.7.1.3: security: Socat security advisory 2 CVE-2010-2799: fixed a stack overflow vulnerability that occurred when command line arguments (whole addresses, host names, file names) were longer than 512 bytes. Note that this could only be exploited when an attacker was able to inject data into socat's command line. Full credits to Felix GrÃ¶bert, Google Security Team, for finding and reporting this issue ####################### V 1.7.1.2: corrections: user-late and group-late, when applied to a pty, affected the system device /dev/ptmx instead of the pty (thanks to Matthew Cloke for pointing me to this bug) socats openssl addresses failed with "nonblocking operation did not complete" when the peer performed a renegotiation. Thanks to Benjamin Delpy for reporting this bug. info message during socks connect showed bad port number on little endian systems due to wrong byte order (thanks to Peter M. Galbavy for bug report and patch) Debian bug 531078: socat execs children with SIGCHLD ignored; corrected to default. Thanks to Martin Dorey for reporting this bug. porting: building socat on systems that predefined the CFLAGS environment to contain -Wall failed (esp.RedHat). Thanks to Paul Wouters for reporting this problem and to Simon Matter for providing the patch support for Solaris 8 and Sun Studio support (thanks to Sebastian Kayser for providing the patches) on some 64bit systems a compiler warning "cast from pointer to integer of different size" was issued on some option definitions added struct sockaddr_ll to union sockaddr_union to avoid "strict aliasing" warnings (problem reported by Paul Wouters) docu: minor corrections in docu ####################### V 1.7.1.1: corrections: corrected the "fixed possible SIGSEGV" fix because SIGSEGV still might occur under those conditions. Thanks to Toni Mattila for first reporting this problem. ftruncate64 cut its argument to 32 bits on systems with 32 bit long type socat crashed on systems without setenv() (esp. SunOS up to Solaris 9); thanks to Todd Stansell for reporting this bug with unidirectional EXEC and SYSTEM a close() operation was performed on a random number which could result in hanging e.a. fixed a compile problem caused by size_t/socklen_t mismatch on 64bit systems docu mentioned option so-bindtodev but correct name is so-bindtodevice. Thanks to Jim Zimmerman for reporting. docu changes: added environment variables example to doc/socat-multicast.html ####################### V 1.7.1.0: new features: address options shut-none, shut-down, and shut-close allow to control socat's half close behaviour with address option shut-null socat sends an empty packet to the peer to indicate EOF option null-eof changes the behaviour of sockets that receive an empty packet to see EOF instead of ignoring it introduced option names substuser-early and su-e, currently equivalent to option substuser (thanks to Mike Perry for providing the patch) corrections: fixed some typos and improved some comments ####################### V 1.7.0.1: corrections: fixed possible SIGSEGV in listening addresses when a new connection was reset by peer before the socket addresses could be retrieved. Thanks to Mike Perry for sending a patch. fixed a bug, introduced with version 1.7.0.0, that let client connections with option connect-timeout fail when the connections succeeded. Thanks to Bruno De Fraine for reporting this bug. option end-close "did not apply" to addresses PTY, SOCKET-CONNECT, and most UNIX-* and ABSTRACT-* half close of EXEC and SYSTEM addresses did not work for pipes and sometimes socketpair help displayed for some option a wrong type under some circumstances shutdown was called multiple times for the same fd ####################### V 1.7.0.0: new features: new address types SCTP-CONNECT and SCTP-LISTEN implement SCTP stream mode for IPv4 and IPv6; new address options sctp-maxseg and sctp-nodelay (suggested by David A. Madore; thanks to Jonathan Brannan for providing an initial patch) new address "INTERFACE" for transparent network interface handling (suggested by Stuart Nicholson) added generic socket addresses: SOCKET-CONNECT, SOCKET-LISTEN, SOCKET-SENDTO, SOCKET-RECVFROM, SOCKET-RECV, SOCKET-DATAGRAM allow protocol independent socket handling; all parameters are explicitely specified as numbers or hex data added address options ioctl-void, ioctl-int, ioctl-intp, ioctl-string, ioctl-bin for generic ioctl() calls. added address options setsockopt-int, setsockopt-bin, and setsockopt-string for generic setsockopt() calls option so-type now only affects the socket() and socketpair() calls, not the name resolution. so-type and so-prototype can now be applied to all socket based addresses. new address option "escape" allows to break a socat instance even when raw terminal mode prevents ^C etc. (feature suggested by Guido Trotter) socat sets environment variables SOCAT_VERSION, SOCAT_PID, SOCAT_PPID for use in executed scripts socat sets environment variables SOCAT_SOCKADDR, SOCAT_SOCKPORT, SOCAT_PEERADDR, SOCAT_PEERPORT in LISTEN type addresses (feature suggested by Ed Sawicki) socat receives all ancillary messages with each received packet on datagram related addresses. The messages are logged in raw form with debug level, and broken down with info level. note: each type of ancillary message must be enabled by appropriate address options. socat provides the contents of ancillary messages received on RECVFROM addresses in appropriate environment variables: SOCAT_TIMESTAMP, SOCAT_IP_DSTADDR, SOCAT_IP_IF, SOCAT_IP_LOCADDR, SOCAT_IP_OPTIONS, SOCAT_IP_TOS, SOCAT_IP_TTL, SOCAT_IPV6_DSTADDR, SOCAT_IPV6_HOPLIMIT, SOCAT_IPV6_TCLASS the following address options were added to enable ancillary messages: so-timestamp, ip-pktinfo (not BSD), ip-recvdstaddr (BSD), ip-recverr, ip-recvif (BSD), ip-recvopts, ip-recvtos, ip-recvttl, ipv6-recvdstopts, ipv6-recverr, ipv6-recvhoplimit, ipv6-recvhopopts, ipv6-recvpathmtu, ipv6-recvpktinfo, ipv6-recvrthdr, ipv6-recvtclass new address options ipv6-tclass and ipv6-unicast-hops set the related socket options. STREAMS (UNIX System V STREAMS) can be configured with the new address options i-pop-all and i-push (thanks to Michal Rysavy for providing a patch) corrections: some raw IP and UNIX datagram modes failed on BSD systems when UDP-LISTEN continued to listen after packet dropped by, e.g., range option, the old listen socket would not be closed but a new one created. open sockets could accumulate. there was a bug in ip*-recv with bind option: it did not bind, and with the first received packet an error occurred: socket_init(): unknown address family 0 test: RAWIP4RECVBIND RECVFROM addresses with FORK option hung after processing the first packet. test: UDP4RECVFROM_FORK corrected a few mistakes that caused compiler warnings on 64bit hosts (thanks to Jonathan Brannan e.a. for providing a patch) EXEC and SYSTEM with stderr injected socat messages into the data stream. test: EXECSTDERRLOG when the EXEC address got a string with consecutive spaces it created additional empty arguments (thanks to Olivier Hervieu for reporting this bug). test: EXECSPACES in ignoreeof polling mode socat also blocked data transfer in the other direction during the 1s wait intervalls (thanks to Jorgen Cederlof for reporting this bug) corrected alphabetical order of options (proxy-auth) some minor corrections improved test.sh script: more stable timing, corrections for BSD replaced the select() calls by poll() to cleanly fix the problems with many file descriptors already open socat option -lf did not log to file but to stderr socat did not compile on Solaris when configured without termios feature (thanks to Pavan Gadi for reporting this bug) porting: socat compiles and runs on AIX with gcc (thanks to Andi Mather for his help) socat compiles and runs on Cygwin (thanks to Jan Just Keijser for his help) socat compiles and runs on HP-UX with gcc (thanks to Michal Rysavy for his help) socat compiles and runs on MacOS X (thanks to Camillo Lugaresi for his help) further changes: filan -s prefixes output with FD number if more than one FD Makefile now supports datarootdir (thanks to Camillo Lugaresi for providing the patch) cleanup in xio-unix.c ####################### V 1.6.0.1: new features: new make target "gitclean" docu source doc/socat.yo released corrections: exec:...,pty did not kill child process under some circumstances; fixed by correcting typo in xio-progcall.c (thanks to Ralph Forsythe for reporting this problem) service name resolution failed due to byte order mistake (thanks to James Sainsbury for reporting this problem) socat would hang when invoked with many file descriptors already opened fix: replaced FOPEN_MAX with FD_SETSIZE thanks to Daniel Lucq for reporting this problem. fixed bugs where sub processes would become zombies because the master process did not catch SIGCHLD. this affected addresses UDP-LISTEN, UDP-CONNECT, TCP-CONNECT, OPENSSL, PROXY, UNIX-CONNECT, UNIX-CLIENT, ABSTRACT-CONNECT, ABSTRACT-CLIENT, SOCKSA, SOCKS4A (thanks to Fernanda G Weiden for reporting this problem) fixed a bug where sub processes would become zombies because the master process caught SIGCHLD but did not wait(). this affected addresses UDP-RECVFROM, IP-RECVFROM, UNIX-RECVFROM, ABSTRACT-RECVFROM (thanks to Evan Borgstrom for reporting this problem) corrected option handling with STDIO; usecase: cool-write configure --disable-pty also disabled option waitlock fixed small bugs on systems with struct ip_mreq without struct ip_mreqn (thanks to Roland Illig for sending a patch) corrected name of option intervall to interval (old form still valid for us German speaking guys) corrected some print statements and variable names make uninstall did not uninstall procan fixed lots of weaknesses in test.sh corrected some bugs and typos in doc/socat.yo, EXAMPLES, C comments further changes: procan -c prints C defines important for socat added test OPENSSLEOF for OpenSSL half close ####################### V 1.6.0.0: new features: new addresses IP-DATAGRAM and UDP-DATAGRAM allow versatile broadcast and multicast modes new option ip-add-membership for control of multicast group membership new address TUN for generation of Linux TUN/TAP pseudo network interfaces (suggested by Mat Caughron); associated options tun-device, tun-name, tun-type; iff-up, iff-promisc, iff-noarp, iff-no-pi etc. new addresses ABSTRACT-CONNECT, ABSTRACT-LISTEN, ABSTRACT-SENDTO, ABSTRACT-RECV, and ABSTRACT-RECVFROM for abstract UNIX domain addresses on Linux (requested by Zeeshan Ali); option unix-tightsocklen controls socklen parameter on system calls. option end-close for control of connection closing allows FD sharing by sub processes range option supports form address:mask with IPv4 changed behaviour of OPENSSL-LISTEN to require and verify client certificate per default options f-setlkw-rd, f-setlkw-wr, f-setlk-rd, f-setlk-wr allow finer grained locking on regular files uninstall target in Makefile (lack reported by Zeeshan Ali) corrections: fixed bug where only first tcpwrap option was applied; fixed bug where tcpwrap IPv6 check always failed (thanks to Rudolf Cejka for reporting and fixing this bug) filan (and socat -D) could hang when a socket was involved corrected PTYs on HP-UX (and maybe others) using STREAMS (inspired by Roberto Mackun) correct bind with udp6-listen (thanks to Jan Horak for reporting this bug) corrected filan.c peekbuff[0] which did not compile with Sun Studio Pro (thanks to Leo Zhadanovsky for reporting this problem) corrected problem with read data buffered in OpenSSL layer (thanks to Jon Nelson for reporting this bug) corrected problem with option readbytes when input stream stayed idle after so many bytes fixed a bug where a datagram receiver with option fork could fork two sub processes per packet further changes: moved documentation to new doc/ subdir new documents (kind of mini tutorials) are provided in doc/ ####################### V 1.5.0.0: new features: new datagram modes for udp, rawip, unix domain sockets socat option -T specifies inactivity timeout rewrote lexical analysis to allow nested socat calls addresses tcp, udp, tcp-l, udp-l, and rawip now support IPv4 and IPv6 socat options -4, -6 and environment variables SOCAT_DEFAULT_LISTEN_IP, SOCAT_PREFERRED_RESOLVE_IP for control of protocol selection addresses ssl, ssl-l, socks, proxy now support IPv4 and IPv6 option protocol-family (pf), esp. for openssl-listen range option supports IPv6 - syntax: range=[::1/128] option ipv6-v6only (ipv6only) new tcp-wrappers options allow-table, deny-table, tcpwrap-etc FIPS version of OpenSSL can be integrated - initial patch provided by David Acker. See README.FIPS support for resolver options res-debug, aaonly, usevc, primary, igntc, recurse, defnames, stayopen, dnsrch options for file attributes on advanced filesystems (ext2, ext3, reiser): secrm, unrm, compr, ext2-sync, immutable, ext2-append, nodump, ext2-noatime, journal-data etc. option cool-write controls severeness of write failure (EPIPE, ECONNRESET) option o-noatime socat option -lh for hostname in log output traffic dumping provides packet headers configure.in became part of distribution socats unpack directory now has full version, e.g. socat-1.5.0.0/ corrected docu of option verify corrections: fixed tcpwrappers integration - initial fix provided by Rudolf Cejka exec with pipes,stderr produced error setuid-early was ignored with many address types some minor corrections ####################### V 1.4.3.1: corrections: PROBLEM: UNIX socket listen accepted only one (or a few) connections. FIX: do not remove listening UNIX socket in child process PROBLEM: SIGSEGV when TCP part of SSL connect failed FIX: check ssl pointer before calling SSL_shutdown In debug mode, show connect client port even when connect fails ####################### V 1.4.3.0: new features: socat options -L, -W for application level locking options "lockfile", "waitlock" for address level locking (Stefan Luethje) option "readbytes" limits read length (Adam Osuchowski) option "retry" for unix-connect, unix-listen, tcp6-listen (Dale Dude) pty symlink, unix listen socket, and named pipe are per default removed after use; option unlink-close overrides this new behaviour and also controls removal of other socat generated files (Stefan Luethje) corrections: option "retry" did not work with tcp-listen EPIPE condition could result in a 100% CPU loop further changes: support systems without SHUT_RD etc. handle more size_t types try to find makedepend options with gcc 3 (richard/OpenMacNews) ####################### V 1.4.2.0: new features: option "connect-timeout" limits wait time for connect operations (requested by Giulio Orsero) option "dhparam" for explicit Diffie-Hellman parameter file corrections: support for OpenSSL DSA certificates (Miika Komu) create install directories before copying files (Miika Komu) when exiting on signal, return status 128+signum instead of 1 on EPIPE and ECONNRESET, only issue a warning (Santiago Garcia Mantinan) -lu could cause a core dump on long messages further changes: modifications to simplify using socats features in applications ####################### V 1.4.1.0: new features: option "wait-slave" blocks open of pty master side until a client connects, "pty-intervall" controls polling option -h as synonym to -? for help (contributed by Christian Lademann) filan prints formatted time stamps and rdev (disable with -r) redirect filan's output, so stdout is not affected (contributed by Luigi Iotti) filan option -L to follow symbolic links filan shows termios control characters corrections: proxy address no longer performs unsolicited retries filan -f no longer needs read permission to analyze a file (but still needs access permission to directory, of course) porting: Option dsusp FreeBSD options noopt, nopush, md5sig OpenBSD options sack-disable, signature-enable HP-UX, Solaris options abort-threshold, conn-abort-threshold HP-UX options b900, b3600, b7200 Tru64/OSF1 options keepinit, paws, sackena, tsoptena further corrections: address pty now uses ptmx as default if openpty is also available ####################### V 1.4.0.3: security: Socat security advisory 1 CVE-2004-1484: fix to a syslog() based format string vulnerability that can lead to remote code execution. See advisory socat-adv-1.txt ####################### V 1.4.0.2: corrections: exec'd write-only addresses get a chance to flush before being killed error handler: print notice on error-exit filan printed wrong file type information ####################### V 1.4.0.1: corrections: socks4a constructed invalid header. Problem found, reported, and fixed by Thomas Themel, by Peter Palfrader, and by rik with nofork, don't forget to apply some process related options (chroot, setsid, setpgid, ...) ####################### V 1.4.0.0: new features: simple openssl server (ssl-l), experimental openssl trust new options "cafile", "capath", "key", "cert", "egd", and "pseudo" for openssl new options "retry", "forever", and "intervall" option "fork" for address TCP improves `gender changer´ options "sigint", "sigquit", and "sighup" control passing of signals to sub process (thanks to David Shea who contributed to this issue) readline takes respect to the prompt issued by the peer address options "prompt" and "noprompt" allow to override readline's new default behaviour readline supports invisible password with option "noecho" socat option -lp allows to set hostname in log output socat option -lu turns on microsecond resolution in log output corrections: before reading available data, check if writing on other channel is possible tcp6, udp6: support hostname specification (not only IP address), and map IP4 names to IP6 addresses openssl client checks server certificate per default support unidirectional communication with exec/system subprocess try to restore original terminal settings when terminating test.sh uses tmp dir /tmp/$USER/$$ instead of /tmp/$$ socks4 failed on platforms where long does not have 32 bits (thanks to Peter Palfrader and Thomas Seyrat) hstrerror substitute wrote wrong messages (HP-UX, Solaris) proxy error message was truncated when answer contained multiple spaces porting: compiles with AIX xlc, HP-UX cc, Tru64 cc (but might not link) ####################### V 1.3.2.2: corrections: PROXY CONNECT failed when the status reply from the proxy server contained more than one consecutive spaces. Problem reported by Alexandre Bezroutchko do not SIGSEGV when proxy address fails to resolve server name udp-listen failed on systems where AF_INET != SOCK_DGRAM (e.g. SunOS). Problem reported by Christoph Schittel test.sh only tests available features added missing IP and TCP options in filan analyzer do not apply stdio address options to both directions when in unidirectional mode on systems lacking /dev/*random and egd, provide (weak) entropy from libc random() porting: changes for HP-UX (VREPRINT, h_NETDB_INTERNAL) compiles on True64, FreeBSD (again), NetBSD, OpenBSD support for long long as st_ino type (Cygwin 1.5) compile on systems where pty can not be featured ####################### V 1.3.2.1: corrections: "final" solution for the ENOCHLD problem corrected "make strip" default gcc debug/opt is "-O" again check for /proc at runtime, even if configure found it src.rpm accidently supported SuSE instead of RedHat ####################### V 1.3.2.0: new features: option "nofork" connects an exec'd script or program directly to the file descriptors of the other address, circumventing the socat transfer engine support for files >2GB, using ftruncate64(), lseek64(), stat64() filan has new "simple" output style (filan -s) porting: options "binary" and "text" for controlling line termination on Cygwin file system access (hint from Yang Wu-Zhou) fix by Yang Wu-Zhou for the Cygwin "No Children" problem improved support for OSR: _SVID3; no IS_SOCK, no F_GETOWN (thanks to John DuBois) minor corrections to avoid warnings with gcc 3 further corrections and minor improvements: configure script is generated with autoconf 2.57 (no longer 2.52) configure passes CFLAGS to Makefile option -??? for complete list of address options and their short forms program name in syslog messages is derived from argv[0] SIGHUP now prints notice instead of error EIO during read of pty now gives Notice instead of Error, and triggers EOF use of hstrerror() for printing resolver error messages setgrent() got required endgrent() ####################### V 1.3.1.0: new features: integration of Wietse Venema's tcpwrapper library (libwrap) with "proxy" address, option "resolve" controls if hostname or IP address is sent in request option "lowport" establishes limited authorization for TCP and UDP connections improvement of .spec file for RPM creation (thanks to Gerd v. Egidy) An accompanying change in the numbering scheme results in an incompatibility with earlier socat RPMs! solved problems and bugs: PROBLEM: socat daemon terminated when the address of a connecting client did not match range option value instead of continue listening SOLVED: in this case, print warning instead of error to keep daemon active PROBLEM: tcp-listen with fork sometimes left excessive number of zombie processes SOLVED: dont assume that each exiting child process generates SIGCHLD when converting CRNL to CR, socat converted to NL further corrections: configure script now disables features that depend on missing files making it more robust in "unsupported" environments server.pem permissions corrected to 600 "make install" now does not strip; use "make strip; make install" if you like strip (suggested by Peter Bray) ####################### V 1.3.0.1: solved problems and bugs: PROBLEM: OPENSSL did not apply tcp, ip, and socket options SOLVED: OPENSSL now correctly handles the options list PROBLEM: CRNL to NL and CRNL to CR conversions failed when CRNL crossed block boundary SOLVED: these conversions now simply strip all CR's or NL's from input stream porting: SunOS ptys now work on x86, too (thanks to Peter Bray) configure looks for freeware libs in /pkgs/lib/ (thanks to Peter Bray) further corrections: added WITH_PROXY value to -V output added compile dependencies of WITH_PTY and WITH_PROXY -?? did not print option group of proxy options corrected syntax for bind option in docu corrected an issue with stdio in unidirectional mode options socksport and proxyport support service names ftp.sh script supports proxy address man page no longer installed with execute permissions (thanks to Peter Bray) fixed a malloc call bug that could cause SIGSEGV or false "out of memory" errors on EXEC and SYSTEM, depending on program name length and libc. ####################### V 1.3.0.0: new features: proxy connect with optional proxy authentication combined hex and text dump mode, credits to Gregory Margo address pty applies options user, group, and perm to device solved problems and bugs: PROBLEM: option reuseport was not applied (BSD, AIX) SOLVED: option reuseport now in phase PASTSOCKET instead of PREBIND, credits to Jean-Baptiste Marchand PROBLEM: ignoreeof with stdio was ignored SOLVED: ignoreeof now works correctly with address stdio PROBLEM: ftp.sh did not use user supplied password SOLVED: ftp.sh now correctly passes password from command line PROBLEM: server.pem had expired SOLVED: new server.pem valid for ten years PROBLEM: socks notice printed wrong port on some platforms SOLVED: socks now uses correct byte-order for port number in notice further corrections: option name o_trunc corrected to o-trunc combined use of -u and -U is now detected and prevented made message system a little more robust against format string attacks ####################### V 1.2.0.0: new features: address pty for putting socat behind a new pseudo terminal that may fake a serial line, modem etc. experimental openssl integration (it does not provide any trust between the peers because is does not check certificates!) options flock-ex, flock-ex-nb, flock-sh, flock-sh-nb to control all locking mechanism provided by flock() options setsid and setpgid now available with all address types option ctty (controlling terminal) now available for all TERMIOS addresses option truncate (a hybrid of open(.., O_TRUNC) and ftruncate()) is replaced by options o-trunc and ftruncate=offset option sourceport now available with TCP and UDP listen addresses to restrict incoming client connections unidirectional mode right-to-left (-U) solved problems and bugs: PROBLEM: addresses without required parameters but an option containing a '/' were incorrectly interpreted as implicit GOPEN address SOLVED: if an address does not have ':' separator but contains '/', check if the slash is before the first ',' before assuming implicit GOPEN. porting: ptys under SunOS work now due to use of stream options further corrections: with -d -d -d -d -D, don't print debug info during file analysis ####################### V 1.1.0.1: new features: .spec file for RPM generation solved problems and bugs: PROBLEM: GOPEN on socket did not apply option unlink-late SOLUTION: GOPEN for socket now applies group NAMED, phase PASTOPEN options PROBLEM: with unidirectional mode, an unnecessary close timeout was applied SOLUTION: in unidirectional mode, terminate without wait time PROBLEM: using GOPEN on a unix domain socket failed for datagram sockets SOLUTION: when connect() fails with EPROTOTYPE, use a datagram socket further corrections: open() flag options had names starting with "o_", now corrected to "o-" in docu, *-listen addresses were called *_listen address unix now called unix-connect because it does not handle unix datagram sockets in test.sh, apply global command line options with all tests ####################### V 1.1.0.0: new features: regular man page and html doc - thanks to kromJx for prototype new address type "readline", utilizing GNU readline and history libs address option "history-file" for readline new option "dash" to "exec" address that allows to start login shells syslog facility can be set per command line option new address option "tcp-quickack", found in Linux 2.4 option -g prevents option group checking filan and procan can print usage procan prints rlimit infos solved problems and bugs: PROBLEM: raw IP socket SIGSEGV'ed when it had been shut down. SOLVED: set eof flag of channel on shutdown. PROBLEM: if channel 2 uses a single non-socket FD in bidirectional mode and has data available while channel 1 reaches EOF, the data is lost. SOLVED: during one loop run, first handle all data transfers and _afterwards_ handle EOF. PROBLEM: despite to option NONBLOCK, the connect() call blocked SOLVED: option NONBLOCK is now applied in phase FD instead of LATE PROBLEM: UNLINK options issued error when file did not exist, terminating socat SOLVED: failure of unlink() is only warning if errno==ENOENT PROBLEM: TCP6-LISTEN required numeric port specification SOLVED: now uses common TCP service resolver PROBLEM: with PIPE, wrong FDs were shown for data transfer loop SOLVED: retrieval of FDs now pays respect to PIPE pecularities PROBLEM: using address EXEC against an address with IGNOREEOF, socat never terminated SOLVED: corrected EOF handling of sigchld porting: MacOS and old AIX versions now have pty flock() now available on Linux (configure check was wrong) named pipe were generated using mknod(), which requires root under BSD now they are generated using mkfifo further corrections: lots of address options that were "forgotten" at runtime are now available option BINDTODEVICE now also called SO-BINDTODEVICE, IF "make install" now installs binaries with ownership 0:0 ####################### V 1.0.4.2: solved problems and bugs: PROBLEM: EOF of one stream caused close of other stream, giving it no chance to go down regularly SOLVED: EOF of one stream now causes shutdown of write part of other stream PROBLEM: sending mail via socks address to qmail showed that crlf option does not work SOLVED: socks address applies PH_LATE options PROBLEM: in debug mode, no info about socat and platform was issued SOLVED: print socat version and uname output in debug mode PROBLEM: invoking socat with -t and no following parameters caused SIGSEGV SOLVED: -t and -b now check next argv entry PROBLEM: when opening of logfile (-lf) failed, no error was reported and no further messages were printed SOLVED: check result of fopen and print error message if it failed new features: address type UDP-LISTEN now supports option fork: it internally applies socket option SO_REUSEADDR so a new UDP socket can bind to port after `accepting´ a connection (child processes might live forever though) (suggestion from Damjan Lango) ####################### V 1.0.4.1: solved problems and bugs: PROB: assert in libc caused an endless recursion SOLVED: no longer catch SIGABRT PROB: socat printed wrong verbose prefix for "right to left" packets SOLVED: new parameter for xiotransfer() passes correct prefix new features: in debug mode, socat prints its command line arguments in verbose mode, escape special characters and replace unprintables with '.'. Patch from Adrian Thurston. ####################### V 1.0.4.0: solved problems and bugs: Debug output for lstat and fstat said "stat" further corrections: FreeBSD now includes libutil.h new features: option setsid with exec/pty option setpgid with exec/pty option ctty with exec/pty TCP V6 connect test gettimeofday in sycls.c (no use yet) porting: before Gethostbyname, invoke inet_aton for MacOSX ####################### V 1.0.3.0: solved problems and bugs: PROB: test 9 of test.sh (echo via file) failed on some platforms, socat exited without error message SOLVED: _xioopen_named_early(): preset statbuf.st_mode with 0 PROB: test 17 hung forever REASON: child death before select loop did not result in EOF SOLVED: check of existence of children before starting select loop PROB: test 17 failed REASON: child dead triggered EOF before last data was read SOLVED: after child death, read last data before setting EOF PROB: filan showed that exec processes incorrectly had fd3 open REASON: inherited open fd3 from main process SOLVED: set CLOEXEC flag on pty fd in main process PROB: help printed "undef" instead of group "FORK" SOLVED: added "FORK" to group name array PROB: fatal messages did not include severity classifier SOLVED: added "F" to severity classifier array PROB: IP6 addresses where printed incorrectly SOLVED: removed type casts to unsigned short * further corrections: socat catches illegal -l modes corrected error message on setsockopt(linger) option tabdly is of type uint correction for UDP over IP6 more cpp conditionals, esp. for IP6 situations better handling of group NAMED options with listening UNIX sockets applyopts2 now includes last given phase corrected option group handling for most address types introduce dropping of unappliable options (dropopts, dropopts2) gopen now accepts socket and unix-socket options exec and system now accept all socket and termios options child process for exec and system addresses with option pty improved descriptions and options for EXAMPLES printf format for file mode changed to "0%03o" with length spec. added va_end() in branch of msg() changed phase of lock options from PASTOPEN to FD support up to four early dying processes structural changes: xiosysincludes now includes sysincludes.h for non xio files new features: option umask CHANGES file TYPE_DOUBLE, u_double OFUNC_OFFSET added getsid(), setsid(), send() to sycls procan prints sid (session id) mail.sh gets -f (from) option new EXAMPLEs for file creation gatherinfo.sh now tells about failures test.sh can check for much more address/option combinations porting: ispeed, ospeed for termios on FreeBSD getpgid() conditional for MacOS 10 added ranlib in Makefile.in for MacOS 10 disable pty option if no pty mechanism is available (MacOS 10) now compiles and runs on MacOS 10 (still some tests fail) setgroups() conditional for cygwin sighandler_t defined conditionally use gcc option -D_GNU_SOURCE