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/*
Copyright (C) 2008, 2009, 2010 Jiri Olsa <olsajiri@gmail.com>
This file is part of the latrace.
The latrace 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 3 of the License, or
(at your option) any later version.
The latrace 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 the latrace (file COPYING). If not, see
<http://www.gnu.org/licenses/>.
*/
#include <string.h>
#include "config.h"
static int add_subst(struct lt_config_audit *cfg, char *subst)
{
struct lt_objsearch *s;
char *dst, *src = subst;
int type;
if (cfg->subst_cnt == LT_NAMES_MAX)
return -1;
do {
if ((dst = strchr(subst, '='))) {
type = LT_OS_PATH;
break;
}
if ((dst = strchr(subst, '%'))) {
type = LT_OS_PTN;
break;
}
if ((dst = strchr(subst, '~'))) {
type = LT_OS_PTN2PATH;
break;
}
} while(0);
if (!dst)
return -1;
*dst++ = 0x0;
PRINT_VERBOSE(cfg, 2, "adding subst type %d, src [%s], dst [%s]\n",
type, src, dst);
s = &cfg->subst[cfg->subst_cnt++];
s->type = type;
s->src = src;
s->dst = dst;
return 0;
}
/*
Comparing src with the name, if matched
replace the name with dst.
name -> /lib/krava.so
src -> /lib/krava.so
dst -> /lib/debil.so
ret -> /lib/debil.so
*/
static int match_path(struct lt_config_audit *cfg, const char *name,
struct lt_objsearch *s, char **ret)
{
PRINT_VERBOSE(cfg, 2, "name [%s], src [%s], dst [%s]\n",
name, s->src, s->dst);
*ret = s->dst;
if (!strcmp(name, s->src))
return 1;
return 0;
}
/*
Matching src in the name, if found,
replace the src with dst part.
name -> /lib/krava.so
src -> krava
dst -> debil
ret -> /lib/debil.so
*/
static int match_ptn(struct lt_config_audit *cfg, const char *name,
struct lt_objsearch *s, char **ret)
{
char *pat, *r;
PRINT_VERBOSE(cfg, 2, "name [%s], src [%s], dst [%s]\n",
name, s->src, s->dst);
pat = strstr(name, s->src);
if (!pat)
return 0;
r = *ret = malloc(strlen(name) + strlen(s->dst));
if (!r) {
perror("malloc failed");
return 0;
}
strncpy(r, name, pat - name);
r += (pat - name);
strcpy(r, s->dst);
strcat(r, pat + strlen(s->src));
PRINT_VERBOSE(cfg, 2, "return %s\n", *ret);
return 1;
}
/*
Looking for src in the name, if found,
replace the name with dst.
name -> /lib/krava.so
src -> krava
dst -> /lib/krava1.so
ret -> /lib/krava1.so
*/
static int match_ptn2path(struct lt_config_audit *cfg, const char *name,
struct lt_objsearch *s, char **ret)
{
PRINT_VERBOSE(cfg, 2, "name [%s], src [%s], dst [%s]\n",
name, s->src, s->dst);
*ret = s->dst;
if (strstr(name, s->src))
return 1;
return 0;
}
static int match(struct lt_config_audit *cfg, const char *name,
struct lt_objsearch *s, char **ret)
{
switch(s->type) {
case LT_OS_PATH:
return match_path(cfg, name, s, ret);
case LT_OS_PTN:
return match_ptn(cfg, name, s, ret);
case LT_OS_PTN2PATH:
return match_ptn2path(cfg, name, s, ret);
};
return 0;
}
int lt_objsearch_init(struct lt_config_audit *cfg, char **ptr, int cnt)
{
int i;
for(i = 0; i < cnt; i++)
if (-1 == add_subst(cfg, ptr[i]))
return -1;
return 0;
}
char* lt_objsearch(struct lt_config_audit *cfg, const char *name,
uintptr_t *cookie, unsigned int flag)
{
int i;
char *ret = NULL;
for(i = 0; i < cfg->subst_cnt; i++)
if (match(cfg, name, &cfg->subst[i], &ret))
return ret;
return (char*) name;
}
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