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/*
Copyright (C) 2010 Denys Vlasenko (dvlasenk@redhat.com)
Copyright (C) 2010 RedHat inc.
This program 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.
This program 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.,
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include "abrtlib.h"
#include "abrt_crash_dump.h"
static const char *const editable_files[] = {
FILENAME_DESCRIPTION,
FILENAME_COMMENT ,
FILENAME_REPRODUCE ,
FILENAME_BACKTRACE ,
NULL
};
static bool is_editable(const char *name, const char *const *v)
{
while (*v) {
if (strcmp(*v, name) == 0)
return true;
v++;
}
return false;
}
bool is_editable_file(const char *file_name)
{
return is_editable(file_name, editable_files);
}
void add_to_crash_data_ext(map_crash_data_t& pCrashData,
const char *pItem,
const char *pType,
const char *pEditable,
const char *pContent)
{
map_crash_data_t::iterator it = pCrashData.find(pItem);
if (it == pCrashData.end()) {
vector_string_t& v = pCrashData[pItem]; /* create empty vector */
v.push_back(pType);
v.push_back(pEditable);
v.push_back(pContent);
return;
}
vector_string_t& v = it->second;
while (v.size() < 3)
v.push_back("");
v[CD_TYPE] = pType;
v[CD_EDITABLE] = pEditable;
v[CD_CONTENT] = pContent;
}
void add_to_crash_data(map_crash_data_t& pCrashData,
const char *pItem,
const char *pContent)
{
add_to_crash_data_ext(pCrashData, pItem, CD_TXT, CD_ISNOTEDITABLE, pContent);
}
static char* is_text_file(const char *name, ssize_t *sz)
{
/* We were using magic.h API to check for file being text, but it thinks
* that file containing just "0" is not text (!!)
* So, we do it ourself.
*/
int fd = open(name, O_RDONLY);
if (fd < 0)
return NULL; /* it's not text (because it does not exist! :) */
/* Maybe 64k limit is small. But _some_ limit is necessary:
* fields declared "text" may end up in editing fields and such.
* We don't want to accidentally end up with 100meg text in a textbox!
* So, don't remove this. If you really need to, raise the limit.
*/
off_t size = lseek(fd, 0, SEEK_END);
if (size < 0 || size > 64*1024)
{
close(fd);
return NULL; /* it's not a SMALL text */
}
lseek(fd, 0, SEEK_SET);
char *buf = (char*)xmalloc(*sz);
ssize_t r = *sz = full_read(fd, buf, *sz);
close(fd);
if (r < 0)
{
free(buf);
return NULL; /* it's not text (because we can't read it) */
}
/* Some files in our dump directories are known to always be textual */
const char *base = strrchr(name, '/');
if (base)
{
base++;
if (strcmp(base, FILENAME_BACKTRACE) == 0
|| strcmp(base, FILENAME_CMDLINE) == 0
) {
return buf;
}
}
/* Every once in a while, even a text file contains a few garbled
* or unexpected non-ASCII chars. We should not declare it "binary".
*/
const unsigned RATIO = 50;
unsigned total_chars = r + RATIO;
unsigned bad_chars = 1; /* 1 prevents division by 0 later */
while (--r >= 0)
{
if (buf[r] >= 0x7f
/* among control chars, only '\t','\n' etc are allowed */
|| (buf[r] < ' ' && !isspace(buf[r]))
) {
if (buf[r] == '\0')
{
/* We don't like NULs very much. Not text for sure! */
free(buf);
return NULL;
}
bad_chars++;
}
}
if ((total_chars / bad_chars) >= RATIO)
return buf; /* looks like text to me */
free(buf);
return NULL; /* it's binary */
}
void load_crash_data_from_crash_dump_dir(struct dump_dir *dd, map_crash_data_t& data)
{
char *short_name;
char *full_name;
dd_init_next_file(dd);
while (dd_get_next_file(dd, &short_name, &full_name))
{
ssize_t sz = 4*1024;
char *text = NULL;
bool editable = is_editable_file(short_name);
if (!editable)
{
text = is_text_file(full_name, &sz);
if (!text)
{
add_to_crash_data_ext(data,
short_name,
CD_BIN,
CD_ISNOTEDITABLE,
full_name
);
free(short_name);
free(full_name);
continue;
}
}
char *content;
if (sz < 4*1024) /* is_text_file did read entire file */
content = xstrndup(text, sz); //TODO: can avoid this copying if is_text_file() adds NUL
else /* no, need to read it all */
content = dd_load_text(dd, short_name);
free(text);
add_to_crash_data_ext(data,
short_name,
CD_TXT,
editable ? CD_ISEDITABLE : CD_ISNOTEDITABLE,
content
);
free(short_name);
free(full_name);
free(content);
}
}
static const std::string* helper_get_crash_data_item_content(const map_crash_data_t& crash_data, const char *key)
{
map_crash_data_t::const_iterator it = crash_data.find(key);
if (it == crash_data.end()) {
return NULL;
}
if (it->second.size() <= CD_CONTENT) {
return NULL;
}
return &it->second[CD_CONTENT];
}
const std::string& get_crash_data_item_content(const map_crash_data_t& crash_data, const char *key)
{
const std::string* sp = helper_get_crash_data_item_content(crash_data, key);
if (sp == NULL) {
if (crash_data.find(key) == crash_data.end())
error_msg_and_die("Error accessing crash data: no ['%s']", key);
error_msg_and_die("Error accessing crash data: no ['%s'][%d]", key, CD_CONTENT);
}
return *sp;
}
const char *get_crash_data_item_content_or_NULL(const map_crash_data_t& crash_data, const char *key)
{
const std::string* sp = helper_get_crash_data_item_content(crash_data, key);
if (!sp) {
return NULL;
}
return sp->c_str();
}
void log_map_crash_data(const map_crash_data_t& data, const char *name)
{
map_crash_data_t::const_iterator it = data.begin();
while (it != data.end())
{
ssize_t sz = it->second.size();
log("%s[%s]:%s/%s/'%.20s'",
name, it->first.c_str(),
sz > 0 ? it->second[0].c_str() : "<NO [0]>",
sz > 1 ? it->second[1].c_str() : "<NO [1]>",
sz > 2 ? it->second[2].c_str() : "<NO [2]>"
);
it++;
}
}
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