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/*
Copyright (C) 2009 Zdenek Prikryl (zprikryl@redhat.com)
Copyright (C) 2009 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"
static void create_hash(char hash_str[SHA1_RESULT_LEN*2 + 1], const char *pInput)
{
char hash_bytes[SHA1_RESULT_LEN];
sha1_ctx_t sha1ctx;
sha1_begin(&sha1ctx);
sha1_hash(&sha1ctx, pInput, strlen(pInput));
sha1_end(&sha1ctx, hash_bytes);
bin2hex(hash_str, hash_bytes, SHA1_RESULT_LEN)[0] = '\0';
//log("hash:%s str:'%s'", hash_str, pInput);
}
static char *run_unstrip_n(const char *dump_dir_name, unsigned timeout_sec)
{
struct dump_dir *dd = dd_opendir(dump_dir_name, /*flags:*/ 0);
if (!dd)
return NULL;
char *uid_str = dd_load_text_ext(dd, FILENAME_UID, DD_FAIL_QUIETLY_ENOENT | DD_LOAD_TEXT_RETURN_NULL_ON_FAILURE);
dd_close(dd);
uid_t uid = -1L;
if (uid_str)
{
uid = xatoi_positive(uid_str);
free(uid_str);
if (uid == geteuid())
{
uid = -1L; /* no need to setuid/gid if we are already under right uid */
}
}
int flags = EXECFLG_INPUT_NUL | EXECFLG_OUTPUT | EXECFLG_SETSID | EXECFLG_QUIET;
if (uid != (uid_t)-1L)
flags |= EXECFLG_SETGUID;
VERB1 flags &= ~EXECFLG_QUIET;
int pipeout[2];
char* args[4];
args[0] = (char*)"eu-unstrip";
args[1] = xasprintf("--core=%s/"FILENAME_COREDUMP, dump_dir_name);
args[2] = (char*)"-n";
args[3] = NULL;
pid_t child = fork_execv_on_steroids(flags, args, pipeout, /*env_vec:*/ NULL, /*dir:*/ NULL, uid);
free(args[1]);
/* Bugs in unstrip or corrupted coredumps can cause it to enter infinite loop.
* Therefore we have a (largish) timeout, after which we kill the child.
*/
int t = time(NULL); /* int is enough, no need to use time_t */
int endtime = t + timeout_sec;
struct strbuf *buf_out = strbuf_new();
while (1)
{
int timeout = endtime - t;
if (timeout < 0)
{
kill(child, SIGKILL);
strbuf_append_strf(buf_out, "\nTimeout exceeded: %u seconds, killing %s\n", timeout_sec, args[0]);
break;
}
/* We don't check poll result - checking read result is enough */
struct pollfd pfd;
pfd.fd = pipeout[0];
pfd.events = POLLIN;
poll(&pfd, 1, timeout * 1000);
char buff[1024];
int r = read(pipeout[0], buff, sizeof(buff) - 1);
if (r <= 0)
break;
buff[r] = '\0';
strbuf_append_str(buf_out, buff);
t = time(NULL);
}
close(pipeout[0]);
/* Prevent having zombie child process */
int status;
waitpid(child, &status, 0);
if (status != 0)
{
/* unstrip didnt exit with exit code 0 */
strbuf_free(buf_out);
return NULL;
}
return strbuf_free_nobuf(buf_out);
}
static void trim_unstrip_output(char *result, const char *unstrip_n_output)
{
// lines look like this:
// 0x400000+0x209000 23c77451cf6adff77fc1f5ee2a01d75de6511dda@0x40024c - - [exe]
// 0x400000+0x209000 ab3c8286aac6c043fd1bb1cc2a0b88ec29517d3e@0x40024c /bin/sleep /usr/lib/debug/bin/sleep.debug [exe]
// 0x7fff313ff000+0x1000 389c7475e3d5401c55953a425a2042ef62c4c7df@0x7fff313ff2f8 . - linux-vdso.so.1
// ^^^^^^ ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
// we drop everything except the marked part ^
char *dst = result;
const char *line = unstrip_n_output;
while (*line)
{
const char *eol = strchrnul(line, '\n');
const char *plus = (char*)memchr(line, '+', eol - line);
if (plus)
{
while (++plus < eol && *plus != '@')
{
if (!isspace(*plus))
{
*dst++ = *plus;
}
}
}
if (*eol != '\n') break;
line = eol + 1;
}
*dst = '\0';
}
int main(int argc, char **argv)
{
abrt_init(argv);
const char *dump_dir_name = ".";
/* Can't keep these strings/structs static: _() doesn't support that */
const char *program_usage_string = _(
"\b [-v] -d DIR\n"
"\n"
"Calculates and saves UUID of coredump in dump directory DIR"
);
enum {
OPT_v = 1 << 0,
OPT_d = 1 << 1,
};
/* Keep enum above and order of options below in sync! */
struct options program_options[] = {
OPT__VERBOSE(&g_verbose),
OPT_STRING('d', NULL, &dump_dir_name, "DIR", _("Dump directory")),
OPT_END()
};
/*unsigned opts =*/ parse_opts(argc, argv, program_options, program_usage_string);
export_abrt_envvars(0);
/* Run unstrip -n and trim its output, leaving only sizes and build ids */
char *unstrip_n_output = run_unstrip_n(dump_dir_name, /*timeout_sec:*/ 30);
if (!unstrip_n_output)
return 1; /* bad dump_dir_name, can't run unstrip, etc... */
/* modifies unstrip_n_output in-place: */
trim_unstrip_output(unstrip_n_output, unstrip_n_output);
/* Hash package + executable + unstrip_n_output and save it as UUID */
struct dump_dir *dd = dd_opendir(dump_dir_name, /*flags:*/ 0);
if (!dd)
return 1;
char *executable = dd_load_text(dd, FILENAME_EXECUTABLE);
char *package = dd_load_text(dd, FILENAME_PACKAGE);
/* Package variable has "firefox-3.5.6-1.fc11[.1]" format */
/* Remove distro suffix and maybe least significant version number */
char *p = package;
while (*p)
{
if (*p == '.' && (p[1] < '0' || p[1] > '9'))
{
/* We found "XXXX.nondigitXXXX", trim this part */
*p = '\0';
break;
}
p++;
}
char *first_dot = strchr(package, '.');
if (first_dot)
{
char *last_dot = strrchr(first_dot, '.');
if (last_dot != first_dot)
{
/* There are more than one dot: "1.2.3"
* Strip last part, we don't want to distinquish crashes
* in packages which differ only by minor release number.
*/
*last_dot = '\0';
}
}
char *string_to_hash = xasprintf("%s%s%s", package, executable, unstrip_n_output);
/*free(package);*/
/*free(executable);*/
/*free(unstrip_n_output);*/
char hash_str[SHA1_RESULT_LEN*2 + 1];
create_hash(hash_str, string_to_hash);
dd_save_text(dd, FILENAME_UUID, hash_str);
dd_close(dd);
return 0;
}
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