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/* Part of SWI-Prolog
Author: Jan Wielemaker
E-mail: J.Wielemaker@vu.nl
WWW: http://www.swi-prolog.org
Copyright (c) 2013-2015, VU University Amsterdam
All rights reserved.
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions
are met:
1. Redistributions of source code must retain the above copyright
notice, this list of conditions and the following disclaimer.
2. Redistributions in binary form must reproduce the above copyright
notice, this list of conditions and the following disclaimer in
the documentation and/or other materials provided with the
distribution.
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
POSSIBILITY OF SUCH DAMAGE.
*/
#include <config.h>
#include <SWI-Prolog.h>
#include <syslog.h>
#include <string.h>
#define streq(s,q) (strcmp(s,q) == 0)
static int
get_option(term_t t, int *opt)
{ term_t tail = PL_copy_term_ref(t);
term_t head = PL_new_term_ref();
char *s;
int option = 0;
while( PL_get_list_ex(tail, head, tail) )
{ if ( PL_get_chars(head, &s, CVT_ATOM|CVT_EXCEPTION) )
{ if ( streq(s, "cons" ) ) option |= LOG_CONS;
else if ( streq(s, "ndelay") ) option |= LOG_NDELAY;
else if ( streq(s, "nowait") ) option |= LOG_NOWAIT;
else if ( streq(s, "odelay") ) option |= LOG_ODELAY;
#ifdef LOG_PERROR
else if ( streq(s, "perror") ) option |= LOG_PERROR;
#endif
else if ( streq(s, "pid") ) option |= LOG_PID;
else return PL_domain_error("syslog_option", head);
} else
return FALSE;
}
if ( PL_get_nil_ex(tail) )
{ *opt = option;
return TRUE;
}
return FALSE;
}
static int
get_facility(term_t t, int *fac)
{ char *s;
int facility;
if ( PL_get_chars(t, &s, CVT_ATOM|CVT_EXCEPTION) )
{ if ( streq(s, "auth" ) ) facility = LOG_AUTH;
#ifdef LOG_AUTHPRIV
else if ( streq(s, "authpriv") ) facility = LOG_AUTHPRIV;
#endif
else if ( streq(s, "cron") ) facility = LOG_CRON;
else if ( streq(s, "daemon") ) facility = LOG_DAEMON;
#ifdef LOG_FTP
else if ( streq(s, "ftp") ) facility = LOG_FTP;
#endif
else if ( streq(s, "kern") ) facility = LOG_KERN;
else if ( streq(s, "local0") ) facility = LOG_LOCAL0;
else if ( streq(s, "local1") ) facility = LOG_LOCAL1;
else if ( streq(s, "local2") ) facility = LOG_LOCAL2;
else if ( streq(s, "local3") ) facility = LOG_LOCAL3;
else if ( streq(s, "local4") ) facility = LOG_LOCAL4;
else if ( streq(s, "local5") ) facility = LOG_LOCAL5;
else if ( streq(s, "local6") ) facility = LOG_LOCAL6;
else if ( streq(s, "local7") ) facility = LOG_LOCAL7;
else if ( streq(s, "lpr") ) facility = LOG_LPR;
else if ( streq(s, "mail") ) facility = LOG_MAIL;
else if ( streq(s, "news") ) facility = LOG_NEWS;
else if ( streq(s, "syslog") ) facility = LOG_SYSLOG;
else if ( streq(s, "user") ) facility = LOG_USER;
else if ( streq(s, "uucp") ) facility = LOG_UUCP;
else return PL_domain_error("syslog_facility", t);
} else
return FALSE;
*fac = facility;
return TRUE;
}
static int
get_priority(term_t t, int *pri)
{ char *s;
int priority;
if ( PL_get_chars(t, &s, CVT_ATOM|CVT_EXCEPTION) )
{ if ( streq(s, "emerg" ) ) priority = LOG_EMERG;
else if ( streq(s, "alert") ) priority = LOG_ALERT;
else if ( streq(s, "crit") ) priority = LOG_CRIT;
else if ( streq(s, "err") ) priority = LOG_ERR;
else if ( streq(s, "warning") ) priority = LOG_WARNING;
else if ( streq(s, "notice") ) priority = LOG_NOTICE;
else if ( streq(s, "info") ) priority = LOG_INFO;
else if ( streq(s, "debug") ) priority = LOG_DEBUG;
else
{ PL_domain_error("syslog_priority", t);
return FALSE;
}
} else
return FALSE;
*pri = priority;
return TRUE;
}
static foreign_t
pl_openlog(term_t Ident, term_t Option, term_t Facility)
{ char *ident;
int option = 0;
int facility = 0;
if ( PL_get_chars(Ident, &ident, CVT_ATOM|REP_MB|CVT_EXCEPTION) &&
get_option(Option, &option) &&
get_facility(Facility, &facility) )
{ openlog(strdup(ident), option, facility);
return TRUE;
}
return FALSE;
}
static foreign_t
pl_syslog(term_t Priority, term_t Message)
{ int p;
char *msg;
if ( get_priority(Priority, &p) &&
PL_get_chars(Message, &msg,
CVT_ALL|CVT_VARIABLE|CVT_WRITE|REP_MB|CVT_EXCEPTION) )
{ syslog(p, "%s", msg);
return TRUE;
}
return FALSE;
}
static foreign_t
pl_closelog(void)
{ closelog();
return TRUE;
}
install_t
install_syslog(void)
{ PL_register_foreign("$openlog", 3, pl_openlog, 0);
PL_register_foreign("syslog", 2, pl_syslog, 0);
PL_register_foreign("$closelog", 0, pl_closelog, 0);
}
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