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#if !defined(lint) && !defined(DOS)
static char rcsid[] = "$Id: pattern.c 169 2006-10-04 23:26:48Z hubert@u.washington.edu $";
#endif
/*
* ========================================================================
* Copyright 2006-2007 University of Washington
* Copyright 2013 Eduardo Chappa
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* ========================================================================
*/
#include <system.h>
#include <general.h>
#include "../c-client/c-client.h"
#include "../pith/osdep/canaccess.h"
#include "../pith/osdep/color.h"
#include "../pith/osdep/pipe.h"
#include "../pith/charconv/utf8.h"
#include "../pith/charconv/filesys.h"
#include "../pith/status.h"
#include "../pith/pipe.h"
#include "../pith/debug.h"
#include "../pith/detach.h"
#include "pipe.h"
#include "pattern.h"
#include "signal.h"
/* Internal prototypes */
int test_message_with_cmd(MAILSTREAM *, long, char *, long, int *);
/*
* pattern_filter_command - filter given message
*/
void
pattern_filter_command(char **cat_cmds, SEARCHSET *srchset, MAILSTREAM *stream, long cat_lim, INTVL_S *cat)
{
char **l;
int exitval, i;
SEARCHSET *s;
MESSAGECACHE *mc;
char *cmd = NULL;
char *just_arg0 = NULL;
char *cmd_start, *cmd_end;
int just_one;
if(!(cat_cmds && cat_cmds[0]))
return;
just_one = !(cat_cmds[1]);
/* find the first command that exists on this host */
for(l = cat_cmds; l && *l; l++){
cmd = cpystr(*l);
removing_quotes(cmd);
if(cmd){
for(cmd_start = cmd;
*cmd_start && isspace(*cmd_start); cmd_start++)
;
for(cmd_end = cmd_start+1;
*cmd_end && !isspace(*cmd_end); cmd_end++)
;
just_arg0 = (char *) fs_get((cmd_end-cmd_start+1)
* sizeof(char));
strncpy(just_arg0, cmd_start, cmd_end - cmd_start);
just_arg0[cmd_end - cmd_start] = '\0';
}
if(valid_filter_command(&just_arg0))
break;
else{
if(just_one){
if(can_access(just_arg0, ACCESS_EXISTS) != 0)
q_status_message1(SM_ORDER, 0, 3,
"\"%s\" does not exist",
just_arg0);
else
q_status_message1(SM_ORDER, 0, 3,
"\"%s\" is not executable",
just_arg0);
}
if(just_arg0)
fs_give((void **) &just_arg0);
if(cmd)
fs_give((void **) &cmd);
}
}
if(!just_arg0 && !just_one)
q_status_message(SM_ORDER, 0, 3,
"None of the category cmds exists and is executable");
/*
* If category_cmd isn't executable, it isn't a match.
*/
if(!just_arg0 || !cmd){
/*
* If we couldn't run the pipe command,
* we declare no match
*/
for(s = srchset; s; s = s->next)
for(i = s->first; i <= s->last; i++)
if(i > 0L && stream && i <= stream->nmsgs
&& (mc=mail_elt(stream, i)) && mc->searched)
mc->searched = NIL;
}
else
for(s = srchset; s; s = s->next)
for(i = s->first; i <= s->last; i++)
if(i > 0L && stream && i <= stream->nmsgs
&& (mc=mail_elt(stream, i)) && mc->searched){
/*
* If there was an error, or the exitval is out of
* range, then it is not a match.
* Default range is (0,0),
* which is right for matching
* bogofilter spam.
*/
if(test_message_with_cmd(stream, i, cmd,
cat_lim, &exitval) != 0)
mc->searched = NIL;
/* test exitval */
if(mc->searched){
INTVL_S *iv;
if(cat){
for(iv = cat; iv; iv = iv->next)
if((long) exitval >= iv->imin
&& (long) exitval <= iv->imax)
break;
if(!iv)
mc->searched = NIL; /* not in any interval */
}
else{
/* default to interval containing only zero */
if(exitval != 0)
mc->searched = NIL;
}
}
}
if(just_arg0)
fs_give((void **) &just_arg0);
if(cmd)
fs_give((void **) &cmd);
}
/*
* Returns 0 if ok, -1 if not ok.
* If ok then exitval contains the exit value of the cmd.
*/
int
test_message_with_cmd(MAILSTREAM *stream, long int msgno, char *cmd,
long char_limit, /* limit testing to this many chars from body */
int *exitval)
{
PIPE_S *tpipe;
gf_io_t pc;
int status = 0, flags, err = 0;
char *resultfile = NULL, *pipe_err;
if(cmd && cmd[0]){
flags = PIPE_WRITE | PIPE_NOSHELL | PIPE_STDERR | PIPE_NONEWMAIL;
dprint((7, "test_message_with_cmd(msgno=%ld cmd=%s)\n",
msgno, cmd));
if((tpipe = cmd_pipe_open(cmd, &resultfile, flags, &pc))){
prime_raw_pipe_getc(stream, msgno, char_limit, FT_PEEK);
gf_filter_init();
gf_link_filter(gf_nvtnl_local, NULL);
if((pipe_err = gf_pipe(raw_pipe_getc, pc)) != NULL){
q_status_message1(SM_ORDER|SM_DING, 3, 3,
"Internal Error: %.200s", pipe_err);
err++;
}
/*
* Don't call new_mail in close_system_pipe because we're probably
* already here from new_mail and we don't want to get loopy.
*/
status = close_system_pipe(&tpipe, exitval, pipe_callback);
/*
* This is a place where the command can put its output, which we
* are not interested in.
*/
if(resultfile){
our_unlink(resultfile);
fs_give((void **) &resultfile);
}
return((err || status) ? -1 : 0);
}
}
return(-1);
}
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