Signal delivered while blocked
Noah Misch
noah@leadboat.com
Fri Aug 4 07:45:00 GMT 2017
The attached demonstration program blocks signals (with sigprocmask()) to
achieve mutual exclusion between signal handlers. It aborts upon receipt of a
blocked signal. On "CYGWIN_NT-10.0 2.7.0(0.306/5/3) 2017-02-12 13:18 x86_64",
signals regularly arrive despite being blocked. Essential parts of the
program include handling two signal numbers and having handlers run for at
least 1-2ms; this problem goes away if I remove one of those attributes.
GNU/Linux, AIX, Solaris, and "CYGWIN_NT-6.0 1.7.27(0.271/5/3) 2013-12-09 11:57
i686" never deliver a blocked signal to this program. I think this Cygwin
behavior is non-conforming.
PostgreSQL trouble prompted this report; the demonstration program is based on
the "postmaster" architecture. postmaster SIGCHLD and SIGUSR1 handlers block
most signals, and they cannot cope with interrupts from blocked signals.
Thanks,
nm
-------------- next part --------------
/*
* Demonstrate improper delivery of a blocked signal.
*
* This program prints "ERROR: already forbidden" and aborts within one
* second on this configuration (uname -srvm):
* CYGWIN_NT-10.0 2.7.0(0.306/5/3) 2017-02-12 13:18 x86_64
*
* It runs indefinitely (>600s) without trouble on these configurations:
* CYGWIN_NT-6.0 1.7.27(0.271/5/3) 2013-12-09 11:57 i686
* Linux 3.10.0-514.16.1.el7.x86_64 #1 SMP Wed Apr 12 15:04:24 UTC 2017 x86_64 [CentOS 7]
* AIX 7100-03-02-1412
* SunOS 5.10 Generic_147147-26 sun4u
*/
#include <setjmp.h>
#include <signal.h>
#include <stddef.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
static sigset_t block, unblock;
static sig_atomic_t sigblocked = 0; /* Have I blocked signals? */
static char *stack_base;
static sigjmp_buf jmp;
static void
sigforbid(void)
{
const char errmsg[] = "ERROR: already forbidden\n";
if (sigprocmask(SIG_SETMASK, &block, NULL) != 0)
perror("sigprocmask");
if (sigblocked == 1)
{
write(2, errmsg, sizeof(errmsg) - 1);
abort();
}
sigblocked = 1;
}
static void
sigpermit(void)
{
const char errmsg[] = "ERROR: already permitted\n";
if (sigblocked == 0)
{
write(2, errmsg, sizeof(errmsg) - 1);
abort();
}
sigblocked = 0;
if (sigprocmask(SIG_SETMASK, &unblock, NULL) != 0)
perror("sigprocmask");
}
/*
* Start fresh in main() when the stack gets too deep. This is not essential
* to the test, but it allows for long runs without huge RLIMIT_STACK.
*/
static void
clear_stack_if_needed(void)
{
char stack_position;
ptrdiff_t stack_usage;
stack_usage = stack_base - &stack_position;
if (stack_usage < 0)
stack_usage = -stack_usage;
if (stack_usage > 1024 * 1024)
{
puts("releasing excess stack");
sigblocked = 1;
siglongjmp(jmp, 1);
}
}
static void
handler(int arg)
{
sigforbid();
clear_stack_if_needed();
/* wait for extra signal to arrive, after 1-2ms */
usleep(5000);
sigpermit();
}
int main(int argc, char **argv)
{
char stack_position;
/* initial signal mask setup */
sigemptyset(&unblock);
sigfillset(&block);
sigdelset(&block, SIGTRAP);
sigdelset(&block, SIGABRT);
sigdelset(&block, SIGILL);
sigdelset(&block, SIGFPE);
sigdelset(&block, SIGSEGV);
sigdelset(&block, SIGBUS);
sigdelset(&block, SIGSYS);
sigdelset(&block, SIGCONT);
sigforbid();
/* Register signal handlers. Problem somehow requires two signals. */
{
struct sigaction act, oact;
act.sa_handler = handler;
sigemptyset(&act.sa_mask);
act.sa_flags = 0;
if (sigaction(SIGUSR1, &act, &oact) != 0)
perror("sigaction");
if (sigaction(SIGCHLD, &act, &oact) != 0)
perror("sigaction");
}
/* start a child to inundate me with signals */
{
pid_t pid, ppid;
pid = fork();
switch (pid)
{
case -1:
perror("fork");
return 1;
case 0:
ppid = getppid();
printf("pid=%d inundating pid=%d with SIGUSR1 and SIGCHLD\n",
getpid(), ppid);
while (kill(ppid, random() % 2 ? SIGUSR1 : SIGCHLD) == 0)
;
puts("child done");
return 0;
}
}
/* loop forever while we receive signals */
stack_base = &stack_position;
sigsetjmp(jmp, 1);
for (;;)
{
sigpermit();
usleep(1000);
sigforbid();
}
}
-------------- next part --------------
Cygwin Configuration Diagnostics
Current System Time: Fri Aug 04 08:26:04 2017
Windows 2016 Server Datacenter Ver 10.0 Build 14393
Path: C:\cygwin64\home\nm\bin
C:\cygwin64\usr\sbin
C:\cygwin64\sbin
C:\cygwin64\usr\local\bin
C:\cygwin64\bin
C:\cygwin64\bin
C:\Tcl\bin
C:\Perl64\site\bin
C:\Perl64\bin
C:\windows\system32
C:\windows
C:\windows\System32\Wbem
C:\windows\System32\WindowsPowerShell\v1.0
C:\ProgramData\GooGet
C:\Program Files (x86)\Google\Cloud SDK\google-cloud-sdk\bin
C:\Program Files\Compute Engine\sysprep
C:\Program Files\Google\Compute Engine\sysprep
C:\Program Files\Google\Compute Engine\metadata_scripts
C:\Program Files (x86)\Windows Kits\10\Windows Performance Toolkit
C:\Strawberry\c\bin
C:\Strawberry\perl\site\bin
C:\Strawberry\perl\bin
C:\Users\cyg_server\AppData\Local\Microsoft\WindowsApps
Output from C:\cygwin64\bin\id.exe
UID: 197608(nm) GID: 197121(None)
197121(None) 11(Authenticated Users)
66048(LOCAL) 66049(CONSOLE LOGON)
4(INTERACTIVE) 15(This Organization)
545(Users) 544(Administrators)
559(Performance Log Users) 405504(High Mandatory Level)
SysDir: C:\windows\system32
WinDir: C:\windows
USER = 'nm'
PWD = '/home/nm'
HOME = '/home/nm'
DEJAGNU = '/home/nm/.dejagnu/global.exp'
MAKEFLAGS = 's'
USERDOMAIN = 'GUSTNADO'
OS = 'Windows_NT'
PROCESSOR_LEVEL = '6'
PSModulePath = '%ProgramFiles(x86)%\WindowsPowerShell\Modules;C:\windows\system32\WindowsPowerShell\v1.0\Modules;C:\Program Files (x86)\Google\Cloud SDK\google-cloud-sdk\platform\PowerShell'
CommonProgramW6432 = 'C:\Program Files\Common Files'
SSH_CONNECTION = '73.158.248.138 37240 10.128.0.2 22'
CommonProgramFiles(x86) = 'C:\Program Files (x86)\Common Files'
LANG = 'en_US.UTF-8'
TZ = 'Atlantic/Reykjavik'
CommonProgramFiles = 'C:\Program Files\Common Files'
LESS = '-M -i'
HISTTIMEFORMAT = '%c '
HOSTNAME = 'gustnado'
PUBLIC = 'C:\Users\Public'
OLDPWD = '/home/nm'
EDITOR = 'emacs -nw'
LOGONSERVER = '\\GUSTNADO'
PROCESSOR_ARCHITECTURE = 'AMD64'
LOCALAPPDATA = 'C:\Users\nm\AppData\Local'
COMPUTERNAME = 'GUSTNADO'
PAGER = 'less'
SYSTEMDRIVE = 'C:'
USERPROFILE = 'C:\Users\nm'
PATHEXT = '.COM;.EXE;.BAT;.CMD;.VBS;.VBE;.JS;.JSE;.WSF;.WSH;.MSC;.tcl'
SYSTEMROOT = 'C:\windows'
USERDOMAIN_ROAMINGPROFILE = 'GUSTNADO'
PROCESSOR_IDENTIFIER = 'Intel64 Family 6 Model 63 Stepping 0, GenuineIntel'
TMP = '/tmp'
CLICOLOR = '1'
SSH_CLIENT = '73.158.248.138 37240 22'
GREP_OPTIONS = '--color=auto'
PROCESSOR_REVISION = '3f00'
PROFILEREAD = 'true'
NUMBER_OF_PROCESSORS = '8'
ProgramW6432 = 'C:\Program Files'
SSH_TTY = '/dev/pty0'
MAIL = '/var/spool/mail//nm'
COMSPEC = 'C:\windows\system32\cmd.exe'
GooGetRoot = 'C:\ProgramData\GooGet'
APPDATA = 'C:\Users\nm\AppData\Roaming'
TERM = 'screen-256color'
SHELL = '/bin/bash'
WINDIR = 'C:\windows'
PHYSICAL_TERM = 'screen-256color'
ProgramData = 'C:\ProgramData'
SHLVL = '1'
PRINTER = 'Microsoft Print to PDF'
PROGRAMFILES = 'C:\Program Files'
ALLUSERSPROFILE = 'C:\ProgramData'
TEMP = '/tmp'
LOGNAME = 'nm'
ProgramFiles(x86) = 'C:\Program Files (x86)'
PS1 = '[\u@\h \l:\j \t \W]\$ '
HOMEDRIVE = 'C:'
INFOPATH = '/usr/local/info:/usr/share/info:/usr/info'
HOMEPATH = '\cygwin64\home\nm'
HISTSIZE = '200000'
ORIGINAL_PATH = '/bin:/cygdrive/c/Tcl/bin:/cygdrive/c/Perl64/site/bin:/cygdrive/c/Perl64/bin:/cygdrive/c/windows/system32:/cygdrive/c/windows:/cygdrive/c/windows/System32/Wbem:/cygdrive/c/windows/System32/WindowsPowerShell/v1.0:/cygdrive/c/ProgramData/GooGet:/cygdrive/c/Program Files (x86)/Google/Cloud SDK/google-cloud-sdk/bin:/cygdrive/c/Program Files/Compute Engine/sysprep:/cygdrive/c/Program Files/Google/Compute Engine/sysprep:/cygdrive/c/Program Files/Google/Compute Engine/metadata_scripts:/cygdrive/c/Program Files (x86)/Windows Kits/10/Windows Performance Toolkit:/cygdrive/c/Strawberry/c/bin:/cygdrive/c/Strawberry/perl/site/bin:/cygdrive/c/Strawberry/perl/bin:/cygdrive/c/Users/cyg_server/AppData/Local/Microsoft/WindowsApps'
EXECIGNORE = '*.dll'
CVS_RSH = 'ssh'
LESSOPEN = '|/home/nm/.lesspipe %s'
VS140COMNTOOLS = 'C:\Program Files (x86)\Microsoft Visual Studio 14.0\Common7\Tools\'
_ = '/usr/bin/cygcheck'
HKEY_CURRENT_USER\SOFTWARE\Cygwin
HKEY_CURRENT_USER\SOFTWARE\Cygwin\Installations
(default) = '\??\c:\cygwin64'
HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\EscDomains\cygwin.com
(default) = 0x00000002
HKEY_LOCAL_MACHINE\SOFTWARE\Cygwin
HKEY_LOCAL_MACHINE\SOFTWARE\Cygwin\Installations
(default) = '\??\C:\cygwin64'
HKEY_LOCAL_MACHINE\SOFTWARE\Cygwin\setup
(default) = 'C:\cygwin64'
obcaseinsensitive set to 1
Cygwin installations found in the registry:
System: Key: e022582115c10879 Path: C:\cygwin64
User: Key: e022582115c10879 Path: c:\cygwin64
c: hd NTFS 51197Mb 77% CP CS UN PA FC EN
C:\cygwin64 / system binary,auto
C:\cygwin64\bin /usr/bin system binary,auto
C:\cygwin64\lib /usr/lib system binary,auto
cygdrive prefix /cygdrive user binary,posix=0,auto
Found: C:\cygwin64\bin\awk
Found: C:\cygwin64\bin\awk
-> C:\cygwin64\bin\gawk.exe
Found: C:\cygwin64\bin\bash.exe
Found: C:\cygwin64\bin\bash.exe
Found: C:\cygwin64\bin\cat.exe
Found: C:\cygwin64\bin\cat.exe
Found: C:\cygwin64\bin\cp.exe
Found: C:\cygwin64\bin\cp.exe
Found: C:\cygwin64\bin\cpp.exe
Found: C:\cygwin64\bin\cpp.exe
Not Found: crontab
Found: C:\cygwin64\bin\find.exe
Found: C:\cygwin64\bin\find.exe
Found: C:\windows\system32\find.exe
Warning: C:\cygwin64\bin\find.exe hides C:\windows\system32\find.exe
Found: C:\cygwin64\bin\gcc.exe
Found: C:\cygwin64\bin\gcc.exe
Found: C:\cygwin64\bin\gdb.exe
Found: C:\cygwin64\bin\gdb.exe
Found: C:\cygwin64\bin\grep.exe
Found: C:\cygwin64\bin\grep.exe
Found: C:\cygwin64\bin\kill.exe
Found: C:\cygwin64\bin\kill.exe
Found: C:\cygwin64\bin\ld.exe
Found: C:\cygwin64\bin\ld.exe
Found: C:\cygwin64\bin\ls.exe
Found: C:\cygwin64\bin\ls.exe
Found: C:\cygwin64\bin\make.exe
Found: C:\cygwin64\bin\make.exe
Found: C:\cygwin64\bin\mv.exe
Found: C:\cygwin64\bin\mv.exe
Found: C:\cygwin64\bin\patch.exe
Found: C:\cygwin64\bin\patch.exe
Found: C:\cygwin64\bin\perl.exe
Found: C:\cygwin64\bin\perl.exe
Found: C:\Perl64\bin\perl.exe
Warning: C:\cygwin64\bin\perl.exe hides C:\Perl64\bin\perl.exe
Found: C:\cygwin64\bin\rm.exe
Found: C:\cygwin64\bin\rm.exe
Found: C:\cygwin64\bin\sed.exe
Found: C:\cygwin64\bin\sed.exe
Found: C:\cygwin64\bin\ssh.exe
Found: C:\cygwin64\bin\ssh.exe
Found: C:\cygwin64\bin\sh.exe
Found: C:\cygwin64\bin\sh.exe
Found: C:\cygwin64\bin\tar.exe
Found: C:\cygwin64\bin\tar.exe
Found: C:\cygwin64\bin\test.exe
Found: C:\cygwin64\bin\test.exe
Found: C:\cygwin64\bin\vi.exe
Found: C:\cygwin64\bin\vi.exe
Found: C:\cygwin64\bin\vim.exe
Found: C:\cygwin64\bin\vim.exe
39k 2016/09/19 C:\cygwin64\bin\cygargp-0.dll - os=4.0 img=0.0 sys=5.2
"cygargp-0.dll" v0.0 ts=2016-09-19 02:13
88k 2016/06/13 C:\cygwin64\bin\cygatomic-1.dll - os=4.0 img=0.0 sys=5.2
"cygatomic-1.dll" v0.0 ts=2016-06-13 17:14
16k 2013/03/26 C:\cygwin64\bin\cygattr-1.dll - os=4.0 img=0.0 sys=5.2
"cygattr-1.dll" v0.0 ts=2013-03-26 18:26
180k 2015/03/23 C:\cygwin64\bin\cygblkid-1.dll - os=4.0 img=0.0 sys=5.2
"cygblkid-1.dll" v0.0 ts=2015-03-23 09:46
64k 2017/02/22 C:\cygwin64\bin\cygbz2-1.dll - os=4.0 img=0.0 sys=5.2
"cygbz2-1.dll" v0.0 ts=2017-02-22 07:22
13k 2015/03/19 C:\cygwin64\bin\cygcom_err-2.dll - os=4.0 img=0.0 sys=5.2
"cygcom_err-2.dll" v0.0 ts=2015-03-19 02:44
31k 2013/04/24 C:\cygwin64\bin\cygcord-1.dll - os=4.0 img=0.0 sys=5.2
"cygcord-1.dll" v0.0 ts=2013-04-24 23:14
10k 2016/06/09 C:\cygwin64\bin\cygcrypt-0.dll - os=4.0 img=0.0 sys=5.2
"cygcrypt-0.dll" v0.0 ts=2016-06-09 16:02
2235k 2017/01/26 C:\cygwin64\bin\cygcrypto-1.0.0.dll - os=4.0 img=0.0 sys=5.2
"cygcrypto-1.0.0.dll" v0.0 ts=2017-01-26 20:10
478k 2016/12/29 C:\cygwin64\bin\cygcurl-4.dll - os=4.0 img=0.0 sys=5.2
"cygcurl-4.dll" v0.0 ts=2016-12-29 04:33
1549k 2016/08/22 C:\cygwin64\bin\cygdb-5.3.dll - os=4.0 img=0.0 sys=5.2
"cygdb-5.3.dll" v0.0 ts=2016-08-22 09:51
267k 2016/10/10 C:\cygwin64\bin\cygdbus-1-3.dll - os=4.0 img=0.0 sys=5.2
"cygdbus-1-3.dll" v0.0 ts=2016-10-10 19:37
124k 2016/08/22 C:\cygwin64\bin\cygdb_cxx-5.3.dll - os=4.0 img=0.0 sys=5.2
"cygdb_cxx-5.3.dll" v0.0 ts=2016-08-22 09:52
570k 2016/08/22 C:\cygwin64\bin\cygdb_sql-5.3.dll - os=4.0 img=0.0 sys=5.2
"cygdb_sql-5.3.dll" v0.0 ts=2016-08-22 09:52
154k 2013/10/20 C:\cygwin64\bin\cygedit-0.dll - os=4.0 img=0.0 sys=5.2
"cygedit-0.dll" v0.0 ts=2013-10-20 21:56
145k 2016/06/21 C:\cygwin64\bin\cygexpat-1.dll - os=4.0 img=0.0 sys=5.2
"cygexpat-1.dll" v0.0 ts=2016-06-21 23:15
30k 2014/10/14 C:\cygwin64\bin\cygfam-0.dll - os=4.0 img=0.0 sys=5.2
"cygfam-0.dll" v0.0 ts=2014-10-14 21:33
27k 2015/11/17 C:\cygwin64\bin\cygffi-6.dll - os=4.0 img=0.0 sys=5.2
"cygffi-6.dll" v0.0 ts=2015-11-17 22:14
55k 2017/03/29 C:\cygwin64\bin\cygformw-10.dll - os=4.0 img=0.0 sys=5.2
"cygformw-10.dll" v0.0 ts=2017-03-29 23:26
103k 2013/04/24 C:\cygwin64\bin\cyggc-1.dll - os=4.0 img=0.0 sys=5.2
"cyggc-1.dll" v0.0 ts=2013-04-24 23:14
8k 2013/04/24 C:\cygwin64\bin\cyggccpp-1.dll - os=4.0 img=0.0 sys=5.2
"cyggccpp-1.dll" v0.0 ts=2013-04-24 23:14
70k 2016/06/13 C:\cygwin64\bin\cyggcc_s-seh-1.dll - os=4.0 img=0.0 sys=5.2
"cyggcc_s-seh-1.dll" v0.0 ts=2016-06-13 16:18
39k 2016/10/10 C:\cygwin64\bin\cyggdbm-4.dll - os=4.0 img=0.0 sys=5.2
"cyggdbm-4.dll" v0.0 ts=2016-10-10 09:26
13k 2016/10/10 C:\cygwin64\bin\cyggdbm_compat-4.dll - os=4.0 img=0.0 sys=5.2
"cyggdbm_compat-4.dll" v0.0 ts=2016-10-10 09:26
1344k 2017/03/17 C:\cygwin64\bin\cyggio-2.0-0.dll - os=4.0 img=0.0 sys=5.2
"cyggio-2.0-0.dll" v0.0 ts=2017-03-06 06:26
975k 2017/03/17 C:\cygwin64\bin\cygglib-2.0-0.dll - os=4.0 img=0.0 sys=5.2
"cygglib-2.0-0.dll" v0.0 ts=2017-03-05 03:42
15k 2017/03/17 C:\cygwin64\bin\cyggmodule-2.0-0.dll - os=4.0 img=0.0 sys=5.2
"cyggmodule-2.0-0.dll" v0.0 ts=2017-03-17 20:26
527k 2017/01/21 C:\cygwin64\bin\cyggmp-10.dll - os=4.0 img=0.0 sys=5.2
"cyggmp-10.dll" v0.0 ts=2017-01-21 18:25
931k 2015/08/28 C:\cygwin64\bin\cyggnutls-28.dll - os=4.0 img=0.0 sys=5.2
"cyggnutls-28.dll" v0.0 ts=2015-08-28 17:05
24k 2015/08/28 C:\cygwin64\bin\cyggnutls-openssl-27.dll - os=4.0 img=0.0 sys=5.2
"cyggnutls-openssl-27.dll" v0.0 ts=2015-08-28 17:06
41k 2015/08/28 C:\cygwin64\bin\cyggnutlsxx-28.dll - os=4.0 img=0.0 sys=5.2
"cyggnutlsxx-28.dll" v0.0 ts=2015-08-28 17:06
284k 2017/03/17 C:\cygwin64\bin\cyggobject-2.0-0.dll - os=4.0 img=0.0 sys=5.2
"cyggobject-2.0-0.dll" v0.0 ts=2017-03-05 03:42
105k 2016/06/13 C:\cygwin64\bin\cyggomp-1.dll - os=4.0 img=0.0 sys=5.2
"cyggomp-1.dll" v0.0 ts=2016-06-13 16:22
10k 2016/06/13 C:\cygwin64\bin\cyggomp-plugin-host_nonshm-1.dll - os=4.0 img=0.0 sys=5.2
"cyggomp-plugin-host_nonshm-1.dll" v0.0 ts=2016-06-13 16:23
258k 2016/09/26 C:\cygwin64\bin\cyggssapi_krb5-2.dll - os=4.0 img=0.0 sys=5.2
"cyggssapi_krb5-2.dll" v0.0 ts=2016-09-26 06:55
9k 2017/03/17 C:\cygwin64\bin\cyggthread-2.0-0.dll - os=4.0 img=0.0 sys=5.2
"cyggthread-2.0-0.dll" v0.0 ts=2017-03-05 03:42
691k 2013/04/22 C:\cygwin64\bin\cygguile-17.dll - os=4.0 img=0.0 sys=5.2
"cygguile-17.dll" v0.0 ts=2013-04-22 03:15
1311k 2017/04/01 C:\cygwin64\bin\cygguile-2.0-22.dll - os=4.0 img=0.0 sys=5.2
"cygguile-2.0-22.dll" v0.0 ts=2017-04-01 04:44
33k 2017/02/13 C:\cygwin64\bin\cyghistory7.dll - os=4.0 img=0.0 sys=5.2
"cyghistory7.dll" v0.0 ts=2017-02-11 22:39
167k 2016/03/13 C:\cygwin64\bin\cyghogweed-2.dll - os=4.0 img=0.0 sys=5.2
"cyghogweed-2.dll" v0.0 ts=2016-03-13 14:46
1009k 2015/02/20 C:\cygwin64\bin\cygiconv-2.dll - os=4.0 img=0.0 sys=5.2
"cygiconv-2.dll" v0.0 ts=2015-02-20 17:07
196k 2014/12/06 C:\cygwin64\bin\cygidn-11.dll - os=4.0 img=0.0 sys=5.2
"cygidn-11.dll" v0.0 ts=2014-12-06 13:17
212k 2016/11/03 C:\cygwin64\bin\cygidn2-0.dll - os=4.0 img=0.0 sys=5.2
"cygidn2-0.dll" v0.0 ts=2016-11-03 18:28
42k 2016/10/23 C:\cygwin64\bin\cygintl-8.dll - os=4.0 img=0.0 sys=5.2
"cygintl-8.dll" v0.0 ts=2016-10-23 07:17
1039k 2015/09/20 C:\cygwin64\bin\cygisl-13.dll - os=4.0 img=0.0 sys=5.2
"cygisl-13.dll" v0.0 ts=2015-09-20 12:39
177k 2016/09/26 C:\cygwin64\bin\cygk5crypto-3.dll - os=4.0 img=0.0 sys=5.2
"cygk5crypto-3.dll" v0.0 ts=2016-09-26 06:55
722k 2016/09/26 C:\cygwin64\bin\cygkrb5-3.dll - os=4.0 img=0.0 sys=5.2
"cygkrb5-3.dll" v0.0 ts=2016-09-26 06:55
35k 2016/09/26 C:\cygwin64\bin\cygkrb5support-0.dll - os=4.0 img=0.0 sys=5.2
"cygkrb5support-0.dll" v0.0 ts=2016-09-26 06:54
45k 2015/11/19 C:\cygwin64\bin\cyglber-2-4-2.dll - os=4.0 img=0.0 sys=5.2
"cyglber-2-4-2.dll" v0.0 ts=2015-11-19 14:17
246k 2015/11/19 C:\cygwin64\bin\cygldap-2-4-2.dll - os=4.0 img=0.0 sys=5.2
"cygldap-2-4-2.dll" v0.0 ts=2015-11-19 14:18
262k 2015/11/19 C:\cygwin64\bin\cygldap_r-2-4-2.dll - os=4.0 img=0.0 sys=5.2
"cygldap_r-2-4-2.dll" v0.0 ts=2015-11-19 14:19
6k 2017/02/12 C:\cygwin64\bin\cyglsa64.dll - os=4.0 img=0.0 sys=5.2
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Cygwin DLL version info:
DLL version: 2.7.0
DLL epoch: 19
DLL old termios: 5
DLL malloc env: 28
Cygwin conv: 181
API major: 0
API minor: 306
Shared data: 5
DLL identifier: cygwin1
Mount registry: 3
Cygwin registry name: Cygwin
Installations name: Installations
Cygdrive default prefix:
Build date:
Shared id: cygwin1S5
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31k 2013/04/24 C:\cygwin64\bin\cygcord-1.dll - os=4.0 img=0.0 sys=5.2
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931k 2015/08/28 C:\cygwin64\bin\cyggnutls-28.dll - os=4.0 img=0.0 sys=5.2
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114k 2016/01/11 C:\cygwin64\bin\cygmagic-1.dll - os=4.0 img=0.0 sys=5.2
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169k 2016/10/10 C:\cygwin64\bin\cygman-2-7-5.dll - os=4.0 img=0.0 sys=5.2
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308k 2016/06/13 C:\cygwin64\bin\cygquadmath-0.dll - os=4.0 img=0.0 sys=5.2
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219k 2017/02/13 C:\cygwin64\bin\cygreadline7.dll - os=4.0 img=0.0 sys=5.2
"cygreadline7.dll" v0.0 ts=2017-02-11 22:39
97k 2014/11/24 C:\cygwin64\bin\cygsasl2-3.dll - os=4.0 img=0.0 sys=5.2
"cygsasl2-3.dll" v0.0 ts=2014-11-24 18:22
11k 2015/07/17 C:\cygwin64\bin\cygsigsegv-2.dll - os=4.0 img=0.0 sys=5.2
"cygsigsegv-2.dll" v0.0 ts=2015-07-17 22:35
89k 2015/03/23 C:\cygwin64\bin\cygsmartcols-1.dll - os=4.0 img=0.0 sys=5.2
"cygsmartcols-1.dll" v0.0 ts=2015-03-23 09:46
982k 2017/01/09 C:\cygwin64\bin\cygsqlite3-0.dll - os=4.0 img=0.0 sys=5.2
"cygsqlite3-0.dll" v0.0 ts=2017-01-09 13:40
156k 2016/03/02 C:\cygwin64\bin\cygssh2-1.dll - os=4.0 img=0.0 sys=5.2
"cygssh2-1.dll" v0.0 ts=2016-03-02 18:03
399k 2017/01/26 C:\cygwin64\bin\cygssl-1.0.0.dll - os=4.0 img=0.0 sys=5.2
"cygssl-1.0.0.dll" v0.0 ts=2017-01-26 20:10
12k 2016/06/13 C:\cygwin64\bin\cygssp-0.dll - os=4.0 img=0.0 sys=5.2
"cygssp-0.dll" v0.0 ts=2016-06-13 17:10
1325k 2016/06/13 C:\cygwin64\bin\cygstdc++-6.dll - os=4.0 img=0.0 sys=5.2
"cygstdc++-6.dll" v0.0 ts=2016-06-13 16:38
66k 2016/08/22 C:\cygwin64\bin\cygtasn1-6.dll - os=4.0 img=0.0 sys=5.2
"cygtasn1-6.dll" v0.0 ts=2016-08-22 20:11
53k 2017/03/29 C:\cygwin64\bin\cygticw-10.dll - os=4.0 img=0.0 sys=5.2
"cygticw-10.dll" v0.0 ts=2017-03-29 23:25
1538k 2015/10/16 C:\cygwin64\bin\cygunistring-2.dll - os=4.0 img=0.0 sys=5.2
"cygunistring-2.dll" v0.0 ts=2015-10-16 21:40
15k 2015/03/23 C:\cygwin64\bin\cyguuid-1.dll - os=4.0 img=0.0 sys=5.2
"cyguuid-1.dll" v0.0 ts=2015-03-23 09:46
8k 2016/06/13 C:\cygwin64\bin\cygvtv-0.dll - os=4.0 img=0.0 sys=5.2
"cygvtv-0.dll" v0.0 ts=2016-06-13 17:12
8k 2016/06/13 C:\cygwin64\bin\cygvtv_stubs-0.dll - os=4.0 img=0.0 sys=5.2
"cygvtv_stubs-0.dll" v0.0 ts=2016-06-13 17:12
1214k 2017/03/13 C:\cygwin64\bin\cygxml2-2.dll - os=4.0 img=0.0 sys=5.2
"cygxml2-2.dll" v0.0 ts=2017-03-13 17:01
83k 2017/03/03 C:\cygwin64\bin\cygz.dll - os=4.0 img=0.0 sys=5.2
"cygz.dll" v0.0 ts=2017-03-03 21:42
3243k 2017/02/12 C:\cygwin64\bin\cygwin1.dll - os=4.0 img=0.0 sys=5.2
"cygwin1.dll" v0.0 ts=2017-02-12 12:18
Cygwin DLL version info:
DLL version: 2.7.0
DLL epoch: 19
DLL old termios: 5
DLL malloc env: 28
Cygwin conv: 181
API major: 0
API minor: 306
Shared data: 5
DLL identifier: cygwin1
Mount registry: 3
Cygwin registry name: Cygwin
Installations name: Installations
Cygdrive default prefix:
Build date:
Shared id: cygwin1S5
Service : sshd
Display name : CYGWIN sshd
Current State : Running
Controls Accepted : Stop
Command : /usr/sbin/sshd -D
stdin path : /dev/null
stdout path : /var/log/sshd.log
stderr path : /var/log/sshd.log
Process Type : Own Process
Startup : Automatic
Dependencies : tcpip
Account : .\cyg_server
Cygwin Package Information
Last downloaded files to: C:\Users\nm\Downloads
Last downloaded files from: http://mirrors.kernel.org/sourceware/cygwin/
Package Version Status
_autorebase 001004-1 OK
alternatives 1.3.30c-10 OK
base-cygwin 3.8-1 OK
base-files 4.2-4 OK
bash 4.4.12-3 OK
bc 1.06.95-2 OK
binutils 2.25-4 OK
bison 3.0.4-1 OK
bzip2 1.0.6-3 OK
ca-certificates 2.11-1 OK
coreutils 8.26-2 OK
csih 0.9.9-1 OK
curl 7.52.1-1 OK
cvs 1.11.23-2 OK
cygrunsrv 1.62-1 OK
cygutils 1.4.15-2 OK
cygwin 2.7.0-1 OK
cygwin-debuginfo 2.7.0-1 OK
cygwin-devel 2.7.0-1 OK
dash 0.5.9.1-1 OK
desktop-file-utils 0.23-1 OK
diffstat 1.61-1 OK
diffutils 3.5-2 OK
editrights 1.03-1 OK
emacs 25.2-0.1 OK
file 5.25-1 OK
findutils 4.6.0-1 OK
flex 2.6.3-1 OK
gamin 0.1.10-15 OK
gawk 4.1.4-3 OK
gcc-core 5.4.0-1 OK
gdb 7.10.1-1 OK
gdb-debuginfo 7.10.1-1 OK
getent 2.18.90-4 OK
git 2.8.3-1 OK
grep 3.0-2 OK
groff 1.22.3-1 OK
gsettings-desktop-schemas 3.22.0-1 OK
gzip 1.8-1 OK
hostname 3.13-1 OK
info 6.3-1 OK
ipc-utils 1.0-2 OK
less 481-1 OK
libargp 20110921-3 OK
libatomic1 5.4.0-1 OK
libattr1 2.4.46-1 OK
libblkid1 2.25.2-2 OK
libbz2_1 1.0.6-3 OK
libcom_err2 1.42.12-2 OK
libcrypt0 1.4-1 OK
libcurl4 7.52.1-1 OK
libdb5.3 5.3.28-1 OK
libdbus1_3 1.10.12-1 OK
libedit0 20130712-1 OK
libexpat1 2.2.0-0 OK
libfam0 0.1.10-15 OK
libffi6 3.2.1-2 OK
libgc1 7.2d-2 OK
libgcc1 5.4.0-1 OK
libgdbm4 1.12-1 OK
libglib2.0_0 2.50.3-1 OK
libgmp10 6.1.2-1 OK
libgnutls28 3.3.17-1 OK
libgomp1 5.4.0-1 OK
libgssapi_krb5_2 1.14.4-1 OK
libguile17 1.8.8-1 OK
libguile2.0_22 2.0.14-1 OK
libhogweed2 2.7.1-1 OK
libiconv 1.14-3 OK
libiconv2 1.14-3 OK
libidn11 1.29-1 OK
libidn2_0 0.11-1 OK
libintl8 0.19.8.1-2 OK
libisl13 0.14.1-1 OK
libk5crypto3 1.14.4-1 OK
libkrb5_3 1.14.4-1 OK
libkrb5support0 1.14.4-1 OK
libltdl7 2.4.6-4 OK
liblzma5 5.2.2-1 OK
libmetalink3 0.1.2-1 OK
libmpc3 1.0.3-1 OK
libmpfr4 3.1.5-1 OK
libncursesw10 6.0-10.20170325 OK
libnettle4 2.7.1-1 OK
libnghttp2_14 1.14.0-2 OK
libopenldap2_4_2 2.4.42-1 OK
libopenssl100 1.0.2k-1 OK
libp11-kit0 0.22.1-1 OK
libpcre1 8.40-2 OK
libpipeline1 1.4.0-1 OK
libpopt-common 1.16-2 OK
libpopt0 1.16-2 OK
libprocps-ng5 3.3.11-1 OK
libpsl5 0.17.0-1 OK
libquadmath0 5.4.0-1 OK
libreadline-devel 7.0.3-3 OK
libreadline7 7.0.3-3 OK
libsasl2_3 2.1.26-9 OK
libsigsegv2 2.10-2 OK
libsmartcols1 2.25.2-2 OK
libsqlite3_0 3.16.2-1 OK
libssh2_1 1.7.0-1 OK
libssp0 5.4.0-1 OK
libstdc++6 5.4.0-1 OK
libtasn1_6 4.9-1 OK
libunistring2 0.9.6-1 OK
libuuid-devel 2.25.2-2 OK
libuuid1 2.25.2-2 OK
libvtv0 5.4.0-1 OK
libxml2 2.9.4-2 OK
libxml2-debuginfo 2.9.4-2 OK
libxml2-devel 2.9.4-2 OK
login 1.11-1 OK
lynx 2.8.7-2 OK
m4 1.4.18-1 OK
make 4.2.1-1 OK
man-db 2.7.5-2 OK
mingw64-i686-binutils 2.25.0.1.23f238d-1 OK
mingw64-i686-gcc-core 5.4.0-4 OK
mingw64-i686-headers 5.0.2-1 OK
mingw64-i686-runtime 5.0.2-1 OK
mingw64-i686-windows-default-manifest 6.4-1 OK
mingw64-i686-winpthreads 5.0.2-1 OK
mingw64-x86_64-binutils 2.25.0.1.23f238d-1 OK
mingw64-x86_64-gcc-core 5.4.0-3 OK
mingw64-x86_64-headers 5.0.2-1 OK
mingw64-x86_64-runtime 5.0.2-1 OK
mingw64-x86_64-windows-default-manifest 6.4-1 OK
mingw64-x86_64-winpthreads 5.0.2-1 OK
mintty 2.7.5-0 OK
ncurses 6.0-10.20170325 OK
openssh 7.5p1-1 OK
openssl 1.0.2k-1 OK
openssl-debuginfo 1.0.2k-1 OK
openssl-devel 1.0.2k-1 OK
p11-kit 0.22.1-1 OK
p11-kit-trust 0.22.1-1 OK
patch 2.7.4-1 OK
perl 5.22.3-1 OK
perl-Carp 1.38-1 OK
perl-Error 0.17024-1 OK
perl-TermReadKey 2.37-1 OK
perl_autorebase 5.22.3-1 OK
perl_base 5.22.3-1 OK
pkg-config 0.29.1-1 OK
procps-ng 3.3.11-1 OK
publicsuffix-list-dafsa 20170206-1 OK
Empty package python
python 2.7.13-1 OK
python2 2.7.13-1 OK
readline-debuginfo 7.0.3-3 OK
rebase 4.4.2-1 OK
rlwrap 0.37-1 OK
rsync 3.1.2-1 OK
run 1.3.4-2 OK
screen 4.5.1-1 OK
sed 4.4-1 OK
shared-mime-info 1.7-1 OK
tar 1.29-1 OK
terminfo 6.0-10.20170325 OK
terminfo-extra 6.0-10.20170325 OK
time 1.7.2-1 OK
tzcode 2016j-1 OK
tzdata 2017b-1 OK
util-linux 2.25.2-2 OK
vim 8.0.0525-1 OK
vim-common 8.0.0525-1 OK
vim-minimal 8.0.0525-1 OK
w32api-headers 5.0.2-1 OK
w32api-runtime 5.0.2-1 OK
wget 1.19.1-1 OK
which 2.20-2 OK
windows-default-manifest 6.4-1 OK
xxd 8.0.0525-1 OK
xz 5.2.2-1 OK
zip 3.0-12 OK
zlib 1.2.11-1 OK
zlib-devel 1.2.11-1 OK
zlib0 1.2.11-1 OK
Use -h to see help about each section
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