| 1 |
/*
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| 2 |
* Copyright (C) 2000 Onlyer (onlyer@263.net)
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| 3 |
* Copyright (C) 2002 Ross Combs (rocombs@cs.nmsu.edu)
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*
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* This program is free software; you can redistribute it and/or
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| 6 |
* modify it under the terms of the GNU General Public License
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| 7 |
* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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| 11 |
* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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| 16 |
* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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| 18 |
*/
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| 19 |
#define ALIAS_COMMAND_INTERNAL_ACCESS
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| 20 |
#include "common/setup_before.h"
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| 21 |
#ifdef HAVE_STDDEF_H
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# include <stddef.h>
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| 23 |
#else
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| 24 |
# ifndef NULL
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| 25 |
# define NULL ((void *)0)
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| 26 |
# endif
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| 27 |
#endif
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| 28 |
#ifdef STDC_HEADERS
|
| 29 |
# include <stdlib.h>
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| 30 |
#else
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# ifdef HAVE_MALLOC_H
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# include <malloc.h>
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| 33 |
# endif
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| 34 |
#endif
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| 35 |
#ifdef HAVE_STRING_H
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# include <string.h>
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| 37 |
#else
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| 38 |
# ifdef HAVE_STRINGS_H
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| 39 |
# include <strings.h>
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| 40 |
# endif
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| 41 |
#endif
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| 42 |
#include "compat/strcasecmp.h"
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| 43 |
#include <ctype.h>
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| 44 |
#include <errno.h>
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| 45 |
#include "compat/strerror.h"
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#include "common/field_sizes.h"
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#include "common/util.h"
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#include "common/eventlog.h"
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#include "common/list.h"
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| 50 |
#include "common/xalloc.h"
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| 51 |
#include "message.h"
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| 52 |
#include "connection.h"
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| 53 |
#include "alias_command.h"
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| 54 |
#include "common/setup_after.h"
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| 55 |
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| 57 |
static t_list * aliaslist_head=NULL;
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| 58 |
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| 59 |
#define MAX_ALIAS_LEN 32
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| 61 |
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| 62 |
static int list_aliases(t_connection * c);
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| 63 |
static char * replace_args(char const * in, unsigned int * offsets, int numargs, char const * text);
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static int do_alias(t_connection * c, char const * cmd, char const * args);
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| 65 |
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| 66 |
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| 67 |
static int list_aliases(t_connection * c)
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| 68 |
{
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t_elem const * elem1;
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| 70 |
t_elem const * elem2;
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t_alias const * alias;
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| 72 |
t_output * output;
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char temp[MAX_MESSAGE_LEN];
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| 74 |
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message_send_text(c,message_type_info,c,"Alias list:");
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LIST_TRAVERSE_CONST(aliaslist_head,elem1)
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{
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if (!(alias = elem_get_data(elem1)))
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continue;
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| 81 |
sprintf(temp,"@%.128s",alias->alias);
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message_send_text(c,message_type_info,c,temp);
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LIST_TRAVERSE_CONST(alias->output,elem2)
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{
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| 85 |
if (!(output = elem_get_data(elem2)))
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continue;
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| 87 |
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| 88 |
/*
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* FIXME: need a more user-friendly way to express this... maybe
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* add a help line to the file format?
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*/
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if (output->min==-1)
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sprintf(temp,"[*]%.128s",output->line);
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| 94 |
else if (output->max==-1)
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sprintf(temp,"[%d+]%.128s",output->min,output->line);
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else if (output->min == output->max)
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sprintf(temp,"[%d]%.128s",output->min,output->line);
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else
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sprintf(temp,"[%d-%d]%.128s",output->min,output->max,output->line);
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message_send_text(c,message_type_info,c,temp);
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}
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}
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return 0;
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}
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| 106 |
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static char * replace_args(char const * in, unsigned int * offsets, int numargs, char const * text)
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| 108 |
{
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char * out;
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unsigned int inpos;
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| 111 |
unsigned int outpos;
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| 112 |
unsigned int off1;
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| 113 |
unsigned int off2;
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| 114 |
unsigned int size;
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| 115 |
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| 116 |
off1 = off2 = 0;
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| 117 |
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| 118 |
out = xstrdup(in);
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size = strlen(out);
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for (inpos=outpos=0; inpos<strlen(in); inpos++)
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{
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| 123 |
if (in[inpos]!='$')
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{
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out[outpos] = in[inpos];
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outpos++;
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continue;
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}
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inpos++;
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| 132 |
if (in[inpos]=='*')
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{
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off1 = offsets[0];
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off2 = strlen(text);
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}
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else if (in[inpos]=='{')
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{
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int arg1, arg2;
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char symbol;
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| 142 |
if (sscanf(&in[inpos],"{%u-%u}",&arg1,&arg2)!=2)
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{
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if (sscanf(&in[inpos],"{%d%c",&arg2,&symbol)!=2)
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{
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| 146 |
while (in[inpos]!='\0' && in[inpos]!='}')
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inpos++;
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continue;
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}
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else
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{
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| 152 |
if (symbol=='}')
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{
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| 154 |
if (arg2<0)
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{
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arg1 = 0;
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arg2 = -arg2;
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}
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else
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{
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arg1 = arg2;
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}
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}
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else if (symbol=='-')
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{
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arg1 = arg2;
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arg2 = numargs-1;
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}
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else
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{
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while (in[inpos]!='\0' && in[inpos]!='}') inpos++;
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continue;
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}
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}
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}
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if (arg2>=numargs)
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arg2 = numargs-1;
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if (arg1>arg2)
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{
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while (in[inpos]!='\0' && in[inpos]!='}')
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inpos++;
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continue;
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}
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off1 = offsets[arg1];
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if (arg2+1==numargs)
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off2 = strlen(text);
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else
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off2 = offsets[arg2+1]-1;
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| 192 |
while (in[inpos]!='\0' && in[inpos]!='}')
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inpos++;
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}
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| 195 |
else if (isdigit((int)in[inpos]))
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{
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| 197 |
int arg;
|
| 198 |
|
| 199 |
if (in[inpos]=='0') arg = 0;
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| 200 |
else if (in[inpos]=='1') arg = 1;
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| 201 |
else if (in[inpos]=='2') arg = 2;
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| 202 |
else if (in[inpos]=='3') arg = 3;
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| 203 |
else if (in[inpos]=='4') arg = 4;
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| 204 |
else if (in[inpos]=='5') arg = 5;
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| 205 |
else if (in[inpos]=='6') arg = 6;
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| 206 |
else if (in[inpos]=='7') arg = 7;
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| 207 |
else if (in[inpos]=='8') arg = 8;
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| 208 |
else arg = 9;
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if (arg>=numargs)
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continue;
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for (off1=off2=offsets[arg]; text[off2]!='\0' && text[off2]!=' ' && text[off2]!='\t'; off2++);
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}
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| 214 |
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| 215 |
{
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| 216 |
char * newout;
|
| 217 |
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| 218 |
newout = xmalloc(size+(off2-off1)+1); /* curr + new + nul */
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size = size+(off2-off1)+1;
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memmove(newout,out,outpos);
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xfree(out);
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out = newout;
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| 223 |
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while (off1<off2)
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out[outpos++] = text[off1++];
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}
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| 227 |
}
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| 228 |
out[outpos] = '\0';
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| 229 |
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| 230 |
return out;
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}
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| 232 |
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| 233 |
int count_args(char const * text)
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| 234 |
{
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| 235 |
int args = 1;
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| 236 |
char * pointer = (char *)text;
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int not_ws = 1;
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| 238 |
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| 239 |
for (;*pointer!='\0';pointer++)
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{
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| 241 |
if ((not_ws) && (*pointer==' ')) not_ws = 0;
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if ((not_ws == 0) && (*pointer!=' ')) { not_ws = 1; args++; }
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| 243 |
}
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| 244 |
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| 245 |
return args;
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}
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| 247 |
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| 248 |
void get_offsets(char const * text, unsigned int * offsets)
|
| 249 |
{
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| 250 |
char * pointer = (char *)text;
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| 251 |
int counter = 1;
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| 252 |
int not_ws = 1;
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| 253 |
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offsets[0]=0;
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| 255 |
for (;*pointer!='\0';pointer++)
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| 256 |
{
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| 257 |
if ((not_ws) && (*pointer==' ')) not_ws = 0;
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| 258 |
if ((not_ws == 0) && (*pointer!=' '))
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| 259 |
{
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| 260 |
not_ws = 1;
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| 261 |
offsets[counter]=(unsigned int)(pointer-text);
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| 262 |
counter++;
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| 263 |
}
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| 264 |
}
|
| 265 |
|
| 266 |
}
|
| 267 |
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| 268 |
static int do_alias(t_connection * c, char const * cmd, char const * text)
|
| 269 |
{
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| 270 |
t_elem const * elem1;
|
| 271 |
t_elem const * elem2;
|
| 272 |
t_alias const * alias;
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| 273 |
t_output * output;
|
| 274 |
unsigned int * offsets;
|
| 275 |
int numargs;
|
| 276 |
int match = -1;
|
| 277 |
|
| 278 |
numargs = count_args(text)-1;
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| 279 |
offsets=xmalloc(sizeof(unsigned int *)*(numargs+1));
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| 280 |
get_offsets(text,offsets);
|
| 281 |
|
| 282 |
LIST_TRAVERSE_CONST(aliaslist_head,elem1)
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| 283 |
{
|
| 284 |
if (!(alias = elem_get_data(elem1)))
|
| 285 |
continue;
|
| 286 |
|
| 287 |
if (strstr(alias->alias,cmd)==NULL)
|
| 288 |
continue;
|
| 289 |
|
| 290 |
LIST_TRAVERSE_CONST(alias->output,elem2)
|
| 291 |
{
|
| 292 |
if (!(output = elem_get_data(elem2)))
|
| 293 |
continue;
|
| 294 |
|
| 295 |
if (!output->line)
|
| 296 |
continue;
|
| 297 |
|
| 298 |
if ((output->min==-1) ||
|
| 299 |
((output->min<=numargs) && (output->max==-1)) ||
|
| 300 |
((output->min<=numargs) && (output->max>=numargs)))
|
| 301 |
|
| 302 |
//TODO: initialize offsets
|
| 303 |
|
| 304 |
{
|
| 305 |
char * msgtmp;
|
| 306 |
char * tmp2;
|
| 307 |
char * cmd = "%C";
|
| 308 |
match = 1;
|
| 309 |
|
| 310 |
if ((msgtmp = replace_args(output->line,offsets,numargs+1,text)))
|
| 311 |
{
|
| 312 |
if (msgtmp[0]!='\0')
|
| 313 |
{
|
| 314 |
if ((msgtmp[0]=='/')&&(msgtmp[1]!='/')) // to make sure we don't get endless aliasing loop
|
| 315 |
{
|
| 316 |
tmp2 = xmalloc(strlen(msgtmp)+3);
|
| 317 |
sprintf(tmp2,"%s%s",cmd,msgtmp);
|
| 318 |
xfree((void *)msgtmp);
|
| 319 |
msgtmp=tmp2;
|
| 320 |
|
| 321 |
}
|
| 322 |
if (strlen(msgtmp)>MAX_MESSAGE_LEN)
|
| 323 |
{
|
| 324 |
msgtmp[MAX_MESSAGE_LEN]='\0';
|
| 325 |
eventlog(eventlog_level_info,__FUNCTION__,"message line after alias expansion was too long, truncating it");
|
| 326 |
}
|
| 327 |
message_send_formatted(c,msgtmp);
|
| 328 |
}
|
| 329 |
xfree((void *)msgtmp); /* avoid warning */
|
| 330 |
}
|
| 331 |
else
|
| 332 |
eventlog(eventlog_level_error,__FUNCTION__,"could not perform argument replacement");
|
| 333 |
}
|
| 334 |
}
|
| 335 |
}
|
| 336 |
xfree(offsets);
|
| 337 |
return match;
|
| 338 |
}
|
| 339 |
|
| 340 |
|
| 341 |
extern int aliasfile_load(char const * filename)
|
| 342 |
{
|
| 343 |
FILE * afp;
|
| 344 |
char * buff;
|
| 345 |
char * temp;
|
| 346 |
unsigned int line;
|
| 347 |
unsigned int pos;
|
| 348 |
int inalias;
|
| 349 |
t_alias * alias = NULL;
|
| 350 |
|
| 351 |
|
| 352 |
if (!filename)
|
| 353 |
{
|
| 354 |
eventlog(eventlog_level_error,__FUNCTION__,"got NULL filename");
|
| 355 |
return -1;
|
| 356 |
}
|
| 357 |
if (!(afp = fopen(filename,"r")))
|
| 358 |
{
|
| 359 |
eventlog(eventlog_level_error,__FUNCTION__,"unable to open alias file \"%s\" for reading (fopen: %s)",filename,pstrerror(errno));
|
| 360 |
return -1;
|
| 361 |
}
|
| 362 |
|
| 363 |
aliaslist_head = list_create();
|
| 364 |
|
| 365 |
inalias = 0;
|
| 366 |
for (line=1; (buff = file_get_line(afp)); line++)
|
| 367 |
{
|
| 368 |
for (pos=0; buff[pos]=='\t' || buff[pos]==' '; pos++);
|
| 369 |
if (buff[pos]=='\0' || buff[pos]=='#')
|
| 370 |
{
|
| 371 |
continue;
|
| 372 |
}
|
| 373 |
if (!(temp = strrchr(buff,'"'))) /* FIXME: assumes comments don't contain " */
|
| 374 |
temp = buff;
|
| 375 |
if ((temp = strrchr(temp,'#')))
|
| 376 |
{
|
| 377 |
unsigned int len;
|
| 378 |
unsigned int endpos;
|
| 379 |
|
| 380 |
*temp = '\0';
|
| 381 |
len = strlen(buff)+1;
|
| 382 |
for (endpos=len-1; buff[endpos]=='\t' || buff[endpos]==' '; endpos--);
|
| 383 |
buff[endpos+1] = '\0';
|
| 384 |
}
|
| 385 |
|
| 386 |
switch (inalias)
|
| 387 |
{
|
| 388 |
case 0:
|
| 389 |
if (buff[pos]!='@') /* not start of alias */
|
| 390 |
{
|
| 391 |
eventlog(eventlog_level_error,__FUNCTION__,"expected start of alias stanza on line %u of alias file \"%s\" but found \"%s\"",line,filename,&buff[pos]);
|
| 392 |
break;
|
| 393 |
}
|
| 394 |
inalias = 1;
|
| 395 |
break;
|
| 396 |
|
| 397 |
case 1:
|
| 398 |
{
|
| 399 |
if (buff[pos]=='\0') break;
|
| 400 |
|
| 401 |
inalias = 2;
|
| 402 |
alias = xmalloc(sizeof(t_alias));
|
| 403 |
alias->output=0;
|
| 404 |
alias->alias=xstrdup(&buff[pos]);
|
| 405 |
}
|
| 406 |
break;
|
| 407 |
|
| 408 |
case 2:
|
| 409 |
{
|
| 410 |
char * dummy;
|
| 411 |
char * out = NULL;
|
| 412 |
int min, max;
|
| 413 |
t_output * output;
|
| 414 |
|
| 415 |
min = max = 0;
|
| 416 |
if (buff[pos]!='[')
|
| 417 |
{
|
| 418 |
eventlog(eventlog_level_error,__FUNCTION__,"expected output entry on line %u of alias file \"%s\" but found \"%s\"",line,filename,&buff[pos]);
|
| 419 |
break;
|
| 420 |
}
|
| 421 |
|
| 422 |
if ((dummy=strchr(&buff[pos],']')))
|
| 423 |
{
|
| 424 |
if (dummy[1]!='\0') out = xstrdup(&dummy[1]);
|
| 425 |
}
|
| 426 |
|
| 427 |
if (buff[pos+1]=='*')
|
| 428 |
{
|
| 429 |
min = max = -1;
|
| 430 |
}
|
| 431 |
else if (buff[pos+1]=='+')
|
| 432 |
{
|
| 433 |
min = 1;
|
| 434 |
max = -1;
|
| 435 |
}
|
| 436 |
else if (sscanf(&buff[pos],"[%u",&min)==1)
|
| 437 |
{
|
| 438 |
if (*(dummy-1)=='+')
|
| 439 |
max = -1;
|
| 440 |
else max = min;
|
| 441 |
}
|
| 442 |
else
|
| 443 |
{
|
| 444 |
eventlog(eventlog_level_error,__FUNCTION__,"error parsing min/max value for alias output");
|
| 445 |
}
|
| 446 |
|
| 447 |
if (out!=NULL)
|
| 448 |
{
|
| 449 |
output = xmalloc(sizeof(t_output));
|
| 450 |
output->min=min;
|
| 451 |
output->max=max;
|
| 452 |
output->line = out;
|
| 453 |
alias->output = list_create();
|
| 454 |
list_append_data(alias->output,output);
|
| 455 |
inalias = 3;
|
| 456 |
}
|
| 457 |
}
|
| 458 |
break;
|
| 459 |
case 3:
|
| 460 |
{
|
| 461 |
if (buff[pos]=='@')
|
| 462 |
{
|
| 463 |
inalias = 1;
|
| 464 |
if (alias!=NULL) list_append_data(aliaslist_head,alias);
|
| 465 |
alias=NULL;
|
| 466 |
break;
|
| 467 |
}
|
| 468 |
else if (buff[pos]=='[')
|
| 469 |
{
|
| 470 |
char * dummy;
|
| 471 |
char * out = NULL;
|
| 472 |
int min, max;
|
| 473 |
t_output * output;
|
| 474 |
|
| 475 |
min = max = 0;
|
| 476 |
if ((dummy=strchr(&buff[pos],']')))
|
| 477 |
{
|
| 478 |
if (dummy[1]!='\0') out = xstrdup(&dummy[1]);
|
| 479 |
}
|
| 480 |
|
| 481 |
|
| 482 |
if (buff[pos+1]=='*')
|
| 483 |
{
|
| 484 |
min = max = -1;
|
| 485 |
}
|
| 486 |
else if (buff[pos+1]=='+')
|
| 487 |
{
|
| 488 |
min = 1;
|
| 489 |
max = -1;
|
| 490 |
}
|
| 491 |
else if (sscanf(&buff[pos],"[%u",&min)==1)
|
| 492 |
{
|
| 493 |
if (*(dummy-1)=='+')
|
| 494 |
max = -1;
|
| 495 |
else max = min;
|
| 496 |
}
|
| 497 |
else
|
| 498 |
{
|
| 499 |
eventlog(eventlog_level_error,__FUNCTION__,"error parsing min/max value for alias output");
|
| 500 |
}
|
| 501 |
|
| 502 |
if (out!=NULL)
|
| 503 |
{
|
| 504 |
output = xmalloc(sizeof(t_output));
|
| 505 |
output->min=min;
|
| 506 |
output->max=max;
|
| 507 |
output->line = out;
|
| 508 |
|
| 509 |
list_append_data(alias->output,output);
|
| 510 |
}
|
| 511 |
}
|
| 512 |
else
|
| 513 |
eventlog(eventlog_level_error,__FUNCTION__,"expected output entry or next alias stanza on line %u of file \"%s\"i but found \"%s\"",line,filename,&buff[pos]);
|
| 514 |
break;
|
| 515 |
}
|
| 516 |
}
|
| 517 |
}
|
| 518 |
if (alias!=NULL) list_append_data(aliaslist_head,alias);
|
| 519 |
|
| 520 |
file_get_line(NULL); // clear file_get_line buffer
|
| 521 |
fclose(afp);
|
| 522 |
eventlog(eventlog_level_info,__FUNCTION__,"done loading aliases");
|
| 523 |
return 0;
|
| 524 |
}
|
| 525 |
|
| 526 |
|
| 527 |
extern int aliasfile_unload(void)
|
| 528 |
{
|
| 529 |
t_elem * elem1;
|
| 530 |
t_elem * elem2;
|
| 531 |
t_alias const * alias;
|
| 532 |
t_output * output;
|
| 533 |
|
| 534 |
if (aliaslist_head)
|
| 535 |
{
|
| 536 |
LIST_TRAVERSE(aliaslist_head,elem1)
|
| 537 |
{
|
| 538 |
if (!(alias = elem_get_data(elem1))) /* should not happen */
|
| 539 |
{
|
| 540 |
eventlog(eventlog_level_error,__FUNCTION__,"alias list contains NULL item");
|
| 541 |
continue;
|
| 542 |
}
|
| 543 |
|
| 544 |
if (list_remove_elem(aliaslist_head,&elem1)<0)
|
| 545 |
{
|
| 546 |
eventlog(eventlog_level_error,__FUNCTION__,"could not remove alias");
|
| 547 |
continue;
|
| 548 |
}
|
| 549 |
if (alias->output)
|
| 550 |
{
|
| 551 |
LIST_TRAVERSE(alias->output,elem2)
|
| 552 |
{
|
| 553 |
if (!(output = elem_get_data(elem2)))
|
| 554 |
{
|
| 555 |
eventlog(eventlog_level_error,__FUNCTION__,"output list contains NULL item");
|
| 556 |
continue;
|
| 557 |
}
|
| 558 |
|
| 559 |
if (list_remove_elem(alias->output,&elem2)<0)
|
| 560 |
{
|
| 561 |
eventlog(eventlog_level_error,__FUNCTION__,"could not remove output");
|
| 562 |
continue;
|
| 563 |
}
|
| 564 |
xfree((void *)output->line); /* avoid warning */
|
| 565 |
xfree((void *)output);
|
| 566 |
}
|
| 567 |
list_destroy(alias->output);
|
| 568 |
}
|
| 569 |
if (alias->alias) xfree((void *)alias->alias);
|
| 570 |
xfree((void *)alias);
|
| 571 |
}
|
| 572 |
|
| 573 |
if (list_destroy(aliaslist_head)<0)
|
| 574 |
return -1;
|
| 575 |
aliaslist_head = NULL;
|
| 576 |
}
|
| 577 |
|
| 578 |
return 0;
|
| 579 |
}
|
| 580 |
|
| 581 |
|
| 582 |
extern int handle_alias_command(t_connection * c, char const * text)
|
| 583 |
{
|
| 584 |
unsigned int i,j;
|
| 585 |
char cmd[MAX_COMMAND_LEN];
|
| 586 |
|
| 587 |
for (i=j=0; text[i]!=' ' && text[i]!='\0'; i++) /* get command */
|
| 588 |
if (j<sizeof(cmd)-1) cmd[j++] = text[i];
|
| 589 |
cmd[j] = '\0';
|
| 590 |
|
| 591 |
if (cmd[2]=='\0')
|
| 592 |
return list_aliases(c);
|
| 593 |
|
| 594 |
if (do_alias(c,cmd,text)<0)
|
| 595 |
{
|
| 596 |
message_send_text(c,message_type_info,c,"No such alias. Use // to show the list.");
|
| 597 |
return -1;
|
| 598 |
}
|
| 599 |
return 0;
|
| 600 |
}
|
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