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gnupg/agent/gpg-agent.c

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/* gpg-agent.c - The GnuPG Agent
* Copyright (C) 2000, 2001, 2002 Free Software Foundation, Inc.
*
* This file is part of GnuPG.
*
* GnuPG is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* GnuPG is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
*/
#include <config.h>
#include <stdio.h>
#include <stdlib.h>
#include <stddef.h>
#include <stdarg.h>
#include <string.h>
#include <errno.h>
#include <assert.h>
#include <time.h>
#include <fcntl.h>
#include <sys/socket.h>
#include <sys/un.h>
#include <unistd.h>
#include <signal.h>
#ifdef USE_GNU_PTH
# include <pth.h>
#endif
#include <gcrypt.h>
#define JNLIB_NEED_LOG_LOGV
#include "agent.h"
#include "../assuan/assuan.h" /* malloc hooks */
#include "i18n.h"
#include "sysutils.h"
enum cmd_and_opt_values
{ aNull = 0,
oCsh = 'c',
oQuiet = 'q',
oSh = 's',
oVerbose = 'v',
oNoVerbose = 500,
oOptions,
oDebug,
oDebugAll,
oDebugWait,
oNoGreeting,
oNoOptions,
oHomedir,
oNoDetach,
oNoGrab,
oLogFile,
oServer,
oDaemon,
oBatch,
oPinentryProgram,
oDisplay,
oTTYname,
oTTYtype,
oLCctype,
oLCmessages,
oScdaemonProgram,
oDefCacheTTL,
oDisablePth,
oIgnoreCacheForSigning,
oKeepTTY,
oKeepDISPLAY,
aTest };
static ARGPARSE_OPTS opts[] = {
{ 301, NULL, 0, N_("@Options:\n ") },
{ oServer, "server", 0, N_("run in server mode (foreground)") },
{ oDaemon, "daemon", 0, N_("run in daemon mode (background)") },
{ oVerbose, "verbose", 0, N_("verbose") },
{ oQuiet, "quiet", 0, N_("be somewhat more quiet") },
{ oSh, "sh", 0, N_("sh-style command output") },
{ oCsh, "csh", 0, N_("csh-style command output") },
{ oOptions, "options" , 2, N_("read options from file")},
{ oDebug, "debug" ,4|16, N_("set debugging flags")},
{ oDebugAll, "debug-all" ,0, N_("enable full debugging")},
{ oDebugWait,"debug-wait",1, "@"},
{ oNoDetach, "no-detach" ,0, N_("do not detach from the console")},
{ oNoGrab, "no-grab" ,0, N_("do not grab keyboard and mouse")},
{ oLogFile, "log-file" ,2, N_("use a log file for the server")},
{ oDisablePth, "disable-pth", 0, N_("do not allow multiple connections")},
{ oPinentryProgram, "pinentry-program", 2 , "path to PIN Entry program" },
{ oDisplay, "display", 2, "set the display" },
{ oTTYname, "ttyname", 2, "set the tty terminal node name" },
{ oTTYtype, "ttytype", 2, "set the tty terminal type" },
{ oLCctype, "lc-ctype", 2, "set the tty LC_CTYPE value" },
{ oLCmessages, "lc-messages", 2, "set the tty LC_MESSAGES value" },
{ oScdaemonProgram, "scdaemon-program", 2 , "path to SCdaemon program" },
{ oDefCacheTTL, "default-cache-ttl", 4,
"|N|expire cached PINs after N seconds"},
{ oIgnoreCacheForSigning, "ignore-cache-for-signing", 0,
"do not use the PIN cache when signing"},
{ oKeepTTY, "keep-tty", 0, N_("ignore requests to change the TTY")},
{ oKeepDISPLAY, "keep-display",
0, N_("ignore requests to change the X display")},
{0}
};
static volatile int caught_fatal_sig = 0;
/* flag to indicate that a shutdown was requested */
static int shutdown_pending;
/* It is possible that we are currently running under setuid permissions */
static int maybe_setuid = 1;
/* Name of the communication socket */
static char socket_name[128];
static void create_directories (void);
#ifdef USE_GNU_PTH
static void handle_connections (int listen_fd);
#endif
static const char *
my_strusage (int level)
{
const char *p;
switch (level)
{
case 11: p = "gpg-agent (GnuPG)";
break;
case 13: p = VERSION; break;
case 17: p = PRINTABLE_OS_NAME; break;
case 19: p = _("Please report bugs to <" PACKAGE_BUGREPORT ">.\n");
break;
case 1:
case 40: p = _("Usage: gpg-agent [options] (-h for help)");
break;
case 41: p = _("Syntax: gpg-agent [options] [command [args]]\n"
"Secret key management for GnuPG\n");
break;
default: p = NULL;
}
return p;
}
static void
i18n_init (void)
{
#ifdef USE_SIMPLE_GETTEXT
set_gettext_file( PACKAGE );
#else
#ifdef ENABLE_NLS
setlocale (LC_ALL, "");
bindtextdomain (PACKAGE, LOCALEDIR);
textdomain (PACKAGE);
#endif
#endif
}
/* Used by gcry for logging */
static void
my_gcry_logger (void *dummy, int level, const char *fmt, va_list arg_ptr)
{
/* translate the log levels */
switch (level)
{
case GCRY_LOG_CONT: level = JNLIB_LOG_CONT; break;
case GCRY_LOG_INFO: level = JNLIB_LOG_INFO; break;
case GCRY_LOG_WARN: level = JNLIB_LOG_WARN; break;
case GCRY_LOG_ERROR:level = JNLIB_LOG_ERROR; break;
case GCRY_LOG_FATAL:level = JNLIB_LOG_FATAL; break;
case GCRY_LOG_BUG: level = JNLIB_LOG_BUG; break;
case GCRY_LOG_DEBUG:level = JNLIB_LOG_DEBUG; break;
default: level = JNLIB_LOG_ERROR; break;
}
log_logv (level, fmt, arg_ptr);
}
static void
cleanup (void)
{
if (*socket_name)
{
char *p;
remove (socket_name);
p = strrchr (socket_name, '/');
if (p)
{
*p = 0;
rmdir (socket_name);
*p = '/';
}
*socket_name = 0;
}
}
static RETSIGTYPE
cleanup_sh (int sig)
{
if (caught_fatal_sig)
raise (sig);
caught_fatal_sig = 1;
/* gcry_control( GCRYCTL_TERM_SECMEM );*/
cleanup ();
#ifndef HAVE_DOSISH_SYSTEM
{ /* reset action to default action and raise signal again */
struct sigaction nact;
nact.sa_handler = SIG_DFL;
sigemptyset( &nact.sa_mask );
nact.sa_flags = 0;
sigaction( sig, &nact, NULL);
}
#endif
raise( sig );
}
int
main (int argc, char **argv )
{
ARGPARSE_ARGS pargs;
int orig_argc;
int may_coredump;
char **orig_argv;
FILE *configfp = NULL;
char *configname = NULL;
const char *shell;
unsigned configlineno;
int parse_debug = 0;
int default_config =1;
int greeting = 0;
int nogreeting = 0;
int pipe_server = 0;
int is_daemon = 0;
int nodetach = 0;
int csh_style = 0;
char *logfile = NULL;
int debug_wait = 0;
int disable_pth = 0;
set_strusage (my_strusage);
gcry_control (GCRYCTL_SUSPEND_SECMEM_WARN);
/* Please note that we may running SUID(ROOT), so be very CAREFUL
when adding any stuff between here and the call to INIT_SECMEM()
somewhere after the option parsing */
log_set_prefix ("gpg-agent", 1|4);
i18n_init ();
/* check that the libraries are suitable. Do it here because
the option parsing may need services of the library */
if (!gcry_check_version (NEED_LIBGCRYPT_VERSION) )
{
log_fatal( _("libgcrypt is too old (need %s, have %s)\n"),
NEED_LIBGCRYPT_VERSION, gcry_check_version (NULL) );
}
assuan_set_malloc_hooks (gcry_malloc, gcry_realloc, gcry_free);
#ifdef USE_GNU_PTH
assuan_set_io_func (pth_read, pth_write);
#endif
gcry_set_log_handler (my_gcry_logger, NULL);
gcry_control (GCRYCTL_USE_SECURE_RNDPOOL);
may_coredump = disable_core_dumps ();
shell = getenv ("SHELL");
if (shell && strlen (shell) >= 3 && !strcmp (shell+strlen (shell)-3, "csh") )
csh_style = 1;
opt.homedir = getenv("GNUPGHOME");
if (!opt.homedir || !*opt.homedir)
opt.homedir = GNUPG_DEFAULT_HOMEDIR;
opt.def_cache_ttl = 10*60; /* default to 10 minutes */
/* check whether we have a config file on the commandline */
orig_argc = argc;
orig_argv = argv;
pargs.argc = &argc;
pargs.argv = &argv;
pargs.flags= 1|(1<<6); /* do not remove the args, ignore version */
while (arg_parse( &pargs, opts))
{
if (pargs.r_opt == oDebug || pargs.r_opt == oDebugAll)
parse_debug++;
else if (pargs.r_opt == oOptions)
{ /* yes there is one, so we do not try the default one, but
read the option file when it is encountered at the
commandline */
default_config = 0;
}
else if (pargs.r_opt == oNoOptions)
default_config = 0; /* --no-options */
else if (pargs.r_opt == oHomedir)
opt.homedir = pargs.r.ret_str;
}
/* initialize the secure memory. */
gcry_control (GCRYCTL_INIT_SECMEM, 16384, 0);
maybe_setuid = 0;
/*
Now we are now working under our real uid
*/
if (default_config)
configname = make_filename (opt.homedir, "gpg-agent.conf", NULL );
argc = orig_argc;
argv = orig_argv;
pargs.argc = &argc;
pargs.argv = &argv;
pargs.flags= 1; /* do not remove the args */
next_pass:
if (configname)
{
configlineno = 0;
configfp = fopen (configname, "r");
if (!configfp)
{
if (default_config)
{
if( parse_debug )
log_info (_("NOTE: no default option file `%s'\n"),
configname );
}
else
{
log_error (_("option file `%s': %s\n"),
configname, strerror(errno) );
exit(2);
}
xfree (configname);
configname = NULL;
}
if (parse_debug && configname )
log_info (_("reading options from `%s'\n"), configname );
default_config = 0;
}
while (optfile_parse( configfp, configname, &configlineno, &pargs, opts) )
{
switch (pargs.r_opt)
{
case oQuiet: opt.quiet = 1; break;
case oVerbose: opt.verbose++; break;
case oBatch: opt.batch=1; break;
case oDebug: opt.debug |= pargs.r.ret_ulong; break;
case oDebugAll: opt.debug = ~0; break;
case oDebugWait: debug_wait = pargs.r.ret_int; break;
case oOptions:
/* config files may not be nested (silently ignore them) */
if (!configfp)
{
xfree(configname);
configname = xstrdup(pargs.r.ret_str);
goto next_pass;
}
break;
case oNoGreeting: nogreeting = 1; break;
case oNoVerbose: opt.verbose = 0; break;
case oNoOptions: break; /* no-options */
case oHomedir: opt.homedir = pargs.r.ret_str; break;
case oNoDetach: nodetach = 1; break;
case oNoGrab: opt.no_grab = 1; break;
case oLogFile: logfile = pargs.r.ret_str; break;
case oCsh: csh_style = 1; break;
case oSh: csh_style = 0; break;
case oServer: pipe_server = 1; break;
case oDaemon: is_daemon = 1; break;
case oDisablePth: disable_pth = 1; break;
case oPinentryProgram: opt.pinentry_program = pargs.r.ret_str; break;
case oDisplay: opt.display = xstrdup (pargs.r.ret_str); break;
case oTTYname: opt.ttyname = xstrdup (pargs.r.ret_str); break;
case oTTYtype: opt.ttytype = xstrdup (pargs.r.ret_str); break;
case oLCctype: opt.lc_ctype = xstrdup (pargs.r.ret_str); break;
case oLCmessages: opt.lc_messages = xstrdup (pargs.r.ret_str); break;
case oScdaemonProgram: opt.scdaemon_program = pargs.r.ret_str; break;
case oDefCacheTTL: opt.def_cache_ttl = pargs.r.ret_ulong; break;
case oIgnoreCacheForSigning: opt.ignore_cache_for_signing = 1; break;
case oKeepTTY: opt.keep_tty = 1; break;
case oKeepDISPLAY: opt.keep_display = 1; break;
default : pargs.err = configfp? 1:2; break;
}
}
if (configfp)
{
fclose( configfp );
configfp = NULL;
xfree(configname);
configname = NULL;
goto next_pass;
}
xfree (configname);
configname = NULL;
if (log_get_errorcount(0))
exit(2);
if (nogreeting )
greeting = 0;
if (greeting)
{
fprintf (stderr, "%s %s; %s\n",
strusage(11), strusage(13), strusage(14) );
fprintf (stderr, "%s\n", strusage(15) );
}
#ifdef IS_DEVELOPMENT_VERSION
log_info ("NOTE: this is a development version!\n");
#endif
if (atexit (cleanup))
{
log_error ("atexit failed\n");
cleanup ();
exit (1);
}
create_directories ();
if (debug_wait && pipe_server)
{
log_debug ("waiting for debugger - my pid is %u .....\n",
(unsigned int)getpid());
sleep (debug_wait);
log_debug ("... okay\n");
}
/* now start with logging to a file if this is desired */
if (logfile)
{
log_set_file (logfile);
log_set_prefix (NULL, 1|2|4);
}
if (pipe_server)
{ /* this is the simple pipe based server */
start_command_handler (-1, -1);
}
else if (!is_daemon)
{
log_info (_("please use the option `--daemon'"
" to run the program in the background\n"));
}
else
{ /* regular server mode */
int fd;
pid_t pid;
int len;
struct sockaddr_un serv_addr;
char *p;
*socket_name = 0;
snprintf (socket_name, DIM(socket_name)-1,
"/tmp/gpg-XXXXXX/S.gpg-agent");
socket_name[DIM(socket_name)-1] = 0;
p = strrchr (socket_name, '/');
if (!p)
BUG ();
*p = 0;;
if (!mkdtemp(socket_name))
{
log_error ("can't create directory `%s': %s\n",
socket_name, strerror(errno) );
exit (1);
}
*p = '/';
if (strchr (socket_name, ':') )
{
log_error ("colons are not allowed in the socket name\n");
exit (1);
}
if (strlen (socket_name)+1 >= sizeof serv_addr.sun_path )
{
log_error ("name of socket too long\n");
exit (1);
}
fd = socket (AF_UNIX, SOCK_STREAM, 0);
if (fd == -1)
{
log_error ("can't create socket: %s\n", strerror(errno) );
exit (1);
}
memset (&serv_addr, 0, sizeof serv_addr);
serv_addr.sun_family = AF_UNIX;
strcpy (serv_addr.sun_path, socket_name);
len = (offsetof (struct sockaddr_un, sun_path)
+ strlen(serv_addr.sun_path) + 1);
if (bind (fd, (struct sockaddr*)&serv_addr, len) == -1)
{
log_error ("error binding socket to `%s': %s\n",
serv_addr.sun_path, strerror (errno) );
close (fd);
exit (1);
}
if (listen (fd, 5 ) == -1)
{
log_error ("listen() failed: %s\n", strerror (errno));
close (fd);
exit (1);
}
if (opt.verbose)
log_info ("listening on socket `%s'\n", socket_name );
fflush (NULL);
pid = fork ();
if (pid == (pid_t)-1)
{
log_fatal ("fork failed: %s\n", strerror (errno) );
exit (1);
}
else if (pid)
{ /* we are the parent */
char *infostr;
close (fd);
/* create the info string: <name>:<pid>:<protocol_version> */
if (asprintf (&infostr, "GPG_AGENT_INFO=%s:%lu:1",
socket_name, (ulong)pid ) < 0)
{
log_error ("out of core\n");
kill (pid, SIGTERM);
exit (1);
}
*socket_name = 0; /* don't let cleanup() remove the socket -
the child should do this from now on */
if (argc)
{ /* run the program given on the commandline */
if (putenv (infostr))
{
log_error ("failed to set environment: %s\n",
strerror (errno) );
kill (pid, SIGTERM );
exit (1);
}
execvp (argv[0], argv);
log_error ("failed to run the command: %s\n", strerror (errno));
kill (pid, SIGTERM);
exit (1);
}
else
{
/* print the environment string, so that the caller can use
shell's eval to set it */
if (csh_style)
{
*strchr (infostr, '=') = ' ';
printf ( "setenv %s\n", infostr);
}
else
{
printf ( "%s; export GPG_AGENT_INFO;\n", infostr);
}
free (infostr);
exit (0);
}
/*NEVER REACHED*/
} /* end parent */
/* this is the child */
/* detach from tty and put process into a new session */
if (!nodetach )
{
int i;
/* close stdin, stdout and stderr unless it is the log stream */
for (i=0; i <= 2; i++)
{
if ( log_get_fd () != i)
close (i);
}
if (setsid() == -1)
{
log_error ("setsid() failed: %s\n", strerror(errno) );
cleanup ();
exit (1);
}
opt.running_detached = 1;
}
if (chdir("/"))
{
log_error ("chdir to / failed: %s\n", strerror (errno));
exit (1);
}
#ifdef USE_GNU_PTH
if (!disable_pth)
{
struct sigaction sa;
if (!pth_init ())
{
log_error ("failed to initialize the Pth library\n");
exit (1);
}
sa.sa_handler = SIG_IGN;
sigemptyset (&sa.sa_mask);
sa.sa_flags = 0;
sigaction (SIGPIPE, &sa, NULL);
handle_connections (fd);
}
else
#endif /*!USE_GNU_PTH*/
/* setup signals */
{
struct sigaction oact, nact;
nact.sa_handler = cleanup_sh;
sigemptyset (&nact.sa_mask);
nact.sa_flags = 0;
sigaction (SIGHUP, NULL, &oact);
if (oact.sa_handler != SIG_IGN)
sigaction (SIGHUP, &nact, NULL);
sigaction( SIGTERM, NULL, &oact );
if (oact.sa_handler != SIG_IGN)
sigaction (SIGTERM, &nact, NULL);
nact.sa_handler = SIG_IGN;
sigaction (SIGPIPE, &nact, NULL);
sigaction (SIGINT, &nact, NULL);
start_command_handler (fd, -1);
}
close (fd);
}
return 0;
}
void
agent_exit (int rc)
{
/*FIXME: update_random_seed_file();*/
#if 1
/* at this time a bit annoying */
if (opt.debug & DBG_MEMSTAT_VALUE)
{
gcry_control( GCRYCTL_DUMP_MEMORY_STATS );
gcry_control( GCRYCTL_DUMP_RANDOM_STATS );
}
if (opt.debug)
gcry_control (GCRYCTL_DUMP_SECMEM_STATS );
#endif
gcry_control (GCRYCTL_TERM_SECMEM );
rc = rc? rc : log_get_errorcount(0)? 2 : 0;
exit (rc);
}
static void
reread_configuration (void)
{
/* FIXME: Move parts of the option parsing to here. */
}
static void
create_private_keys_directory (const char *home)
{
char *fname;
struct stat statbuf;
fname = make_filename (home, GNUPG_PRIVATE_KEYS_DIR, NULL);
if (stat (fname, &statbuf) && errno == ENOENT)
{
if (mkdir (fname, S_IRUSR|S_IWUSR|S_IXUSR ))
log_error (_("can't create directory `%s': %s\n"),
fname, strerror(errno) );
else if (!opt.quiet)
log_info (_("directory `%s' created\n"), fname);
}
xfree (fname);
}
/* Create the directory only if the supplied directory name is the
same as the default one. This way we avoid to create arbitrary
directories when a non-default home directory is used. To cope
with HOME, we compare only the suffix if we see that the default
homedir does start with a tilde. We don't stop here in case of
problems because other functions will throw an error anyway.*/
static void
create_directories (void)
{
struct stat statbuf;
const char *defhome = GNUPG_DEFAULT_HOMEDIR;
char *home;
home = make_filename (opt.homedir, NULL);
if ( stat (home, &statbuf) )
{
if (errno == ENOENT)
{
if ( (*defhome == '~'
&& (strlen (home) >= strlen (defhome+1)
&& !strcmp (home + strlen(home)
- strlen (defhome+1), defhome+1)))
|| (*defhome != '~' && !strcmp (home, defhome) )
)
{
if (mkdir (home, S_IRUSR|S_IWUSR|S_IXUSR ))
log_error (_("can't create directory `%s': %s\n"),
home, strerror(errno) );
else
{
if (!opt.quiet)
log_info (_("directory `%s' created\n"), home);
create_private_keys_directory (home);
}
}
}
else
log_error ("error stat-ing `%s': %s\n", home, strerror (errno));
}
else if ( !S_ISDIR(statbuf.st_mode))
{
log_error ("can't use `%s' as home directory\n", home);
}
else /* exists and is a directory. */
{
create_private_keys_directory (home);
}
xfree (home);
}
#ifdef USE_GNU_PTH
static void
handle_signal (int signo)
{
switch (signo)
{
case SIGHUP:
log_info ("SIGHUP received - "
"re-reading configuration and flushing cache\n");
agent_flush_cache ();
reread_configuration ();
break;
case SIGUSR1:
if (opt.verbose < 5)
opt.verbose++;
log_info ("SIGUSR1 received - verbosity set to %d\n", opt.verbose);
break;
case SIGUSR2:
if (opt.verbose)
opt.verbose--;
log_info ("SIGUSR2 received - verbosity set to %d\n", opt.verbose );
break;
case SIGTERM:
if (!shutdown_pending)
log_info ("SIGTERM received - shutting down ...\n");
else
log_info ("SIGTERM received - still %ld running threads\n",
pth_ctrl( PTH_CTRL_GETTHREADS ));
shutdown_pending++;
if (shutdown_pending > 2)
{
log_info ("shutdown forced\n");
log_info ("%s %s stopped\n", strusage(11), strusage(13) );
cleanup ();
agent_exit (0);
}
break;
case SIGINT:
log_info ("SIGINT received - immediate shutdown\n");
log_info( "%s %s stopped\n", strusage(11), strusage(13));
cleanup ();
agent_exit (0);
break;
default:
log_info ("signal %d received - no action defined\n", signo);
}
}
static void *
start_connection_thread (void *arg)
{
int fd = (int)arg;
if (opt.verbose)
log_info ("handler for fd %d started\n", fd);
start_command_handler (-1, fd);
if (opt.verbose)
log_info ("handler for fd %d terminated\n", fd);
return NULL;
}
static void
handle_connections (int listen_fd)
{
pth_attr_t tattr;
pth_event_t ev;
sigset_t sigs;
int signo;
struct sockaddr_un paddr;
socklen_t plen = sizeof( paddr );
int fd;
tattr = pth_attr_new();
pth_attr_set (tattr, PTH_ATTR_JOINABLE, 0);
pth_attr_set (tattr, PTH_ATTR_STACK_SIZE, 32*1024);
pth_attr_set (tattr, PTH_ATTR_NAME, "gpg-agent");
sigemptyset (&sigs );
sigaddset (&sigs, SIGHUP);
sigaddset (&sigs, SIGUSR1);
sigaddset (&sigs, SIGUSR2);
sigaddset (&sigs, SIGINT);
sigaddset (&sigs, SIGTERM);
ev = pth_event (PTH_EVENT_SIGS, &sigs, &signo);
for (;;)
{
if (shutdown_pending)
{
if (pth_ctrl (PTH_CTRL_GETTHREADS) == 1)
break; /* ready */
/* Do not accept anymore connections and wait for existing
connections to terminate */
signo = 0;
pth_wait (ev);
if (pth_event_occurred (ev) && signo)
handle_signal (signo);
continue;
}
fd = pth_accept_ev (listen_fd, (struct sockaddr *)&paddr, &plen, ev);
if (fd == -1)
{
if (pth_event_occurred (ev))
{
handle_signal (signo);
continue;
}
log_error ("accept failed: %s - waiting 1s\n", strerror (errno));
pth_sleep(1);
continue;
}
if (!pth_spawn (tattr, start_connection_thread, (void*)fd))
{
log_error ("error spawning connection handler: %s\n",
strerror (errno) );
close (fd);
}
}
pth_event_free (ev, PTH_FREE_ALL);
cleanup ();
log_info ("%s %s stopped\n", strusage(11), strusage(13));
}
#endif /*USE_GNU_PTH*/
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