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journal: hook up coredumping with journal

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This commit is contained in:
Lennart Poettering 2012-01-14 00:37:35 +01:00
parent 755a02c680
commit f5e04665eb
9 changed files with 222 additions and 0 deletions
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1
.gitignore vendored
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@ -1,3 +1,4 @@
/systemd-coredump
/systemd-cat
/systemd-rc-local-generator
/libsystemd-id128.pc

25
Makefile.am
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@ -52,6 +52,7 @@ bashcompletiondir=$(sysconfdir)/bash_completion.d
pkgsysconfdir=$(sysconfdir)/systemd
userunitdir=$(prefix)/lib/systemd/user
tmpfilesdir=$(prefix)/lib/tmpfiles.d
sysctldir=$(prefix)/lib/sysctl.d
usergeneratordir=$(pkglibexecdir)/user-generators
pkgincludedir=$(includedir)/systemd
@ -1397,6 +1398,27 @@ EXTRA_DIST += \
CLEANFILES += \
src/journal/journald-gperf.c
if ENABLE_COREDUMP
systemd_coredump_SOURCES = \
src/journal/coredump.c
systemd_coredump_LDADD = \
libsystemd-basic.la \
libsystemd-journal.la \
libsystemd-login.la
rootlibexec_PROGRAMS += \
systemd-coredump
sysctl_DATA = \
sysctl.d/coredump.conf
EXTRA_DIST += \
sysctl.d/coredump.conf.in
endif
# ------------------------------------------------------------------------------
if ENABLE_BINFMT
systemd_binfmt_SOURCES = \
@ -2074,6 +2096,9 @@ units/%: units/%.in Makefile
man/%: man/%.in Makefile
$(SED_PROCESS)
sysctl.d/%: sysctl.d/%.in Makefile
$(SED_PROCESS)
%.pc: %.pc.in Makefile
$(SED_PROCESS)

8
configure.ac
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@ -372,6 +372,13 @@ if test "x$enable_localed" != "xno"; then
fi
AM_CONDITIONAL(ENABLE_LOCALED, [test "$have_localed" = "yes"])
have_coredump=no
AC_ARG_ENABLE(coredump, AS_HELP_STRING([--disable-coredump], [disable coredump hook]))
if test "x$enable_coredump" != "xno"; then
have_coredump=yes
fi
AM_CONDITIONAL(ENABLE_COREDUMP, [test "$have_coredump" = "yes"])
have_gtk=no
AC_ARG_ENABLE(gtk, AS_HELP_STRING([--disable-gtk], [disable GTK tools]))
if test "x$enable_gtk" != "xno"; then
@ -646,6 +653,7 @@ AC_MSG_RESULT([
hostnamed: ${have_hostnamed}
timedated: ${have_timedated}
localed: ${have_localed}
coredump: ${have_coredump}
plymouth: ${have_plymouth}
prefix: ${prefix}
rootprefix: ${with_rootprefix}

1
src/.gitignore vendored
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@ -1,3 +1,4 @@
/*.pc
load-fragment-gperf-nulstr.c
load-fragment-gperf.c
load-fragment-gperf.gperf

173
src/journal/coredump.c Normal file
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@ -0,0 +1,173 @@
/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
/***
This file is part of systemd.
Copyright 2012 Lennart Poettering
systemd 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.
systemd 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 systemd; If not, see <http://www.gnu.org/licenses/>.
***/
#include <errno.h>
#include <unistd.h>
#include <systemd/sd-journal.h>
#include <systemd/sd-login.h>
#include "log.h"
#include "util.h"
#define COREDUMP_MAX (64*1024)
enum {
ARG_PID = 1,
ARG_UID,
ARG_GID,
ARG_SIGNAL,
ARG_TIMESTAMP,
ARG_COMM,
_ARG_MAX
};
int main(int argc, char* argv[]) {
int r, j = 0;
char *p = NULL;
ssize_t n;
pid_t pid;
struct iovec iovec[14];
char *core_pid = NULL, *core_uid = NULL, *core_gid = NULL, *core_signal = NULL,
*core_timestamp = NULL, *core_comm = NULL, *core_exe = NULL, *core_unit = NULL,
*core_session = NULL, *core_message = NULL, *core_cmdline = NULL, *t;
log_set_target(LOG_TARGET_JOURNAL_OR_KMSG);
log_parse_environment();
log_open();
if (argc != _ARG_MAX) {
log_error("Invalid number of arguments passed from kernel.");
r = -EINVAL;
goto finish;
}
r = parse_pid(argv[ARG_PID], &pid);
if (r < 0) {
log_error("Failed to parse PID.");
r = -EINVAL;
goto finish;
}
p = malloc(9 + COREDUMP_MAX);
if (!p) {
log_error("Out of memory");
r = -ENOMEM;
goto finish;
}
memcpy(p, "COREDUMP=", 9);
n = loop_read(STDIN_FILENO, p + 9, COREDUMP_MAX, false);
if (n < 0) {
log_error("Failed to read core dump data: %s", strerror(-n));
r = (int) n;
goto finish;
}
zero(iovec);
iovec[j].iov_base = p;
iovec[j].iov_len = 9 + n;
j++;
core_pid = strappend("COREDUMP_PID=", argv[ARG_PID]);
if (core_pid)
IOVEC_SET_STRING(iovec[j++], core_pid);
core_uid = strappend("COREDUMP_UID=", argv[ARG_UID]);
if (core_uid)
IOVEC_SET_STRING(iovec[j++], core_uid);
core_gid = strappend("COREDUMP_GID=", argv[ARG_GID]);
if (core_gid)
IOVEC_SET_STRING(iovec[j++], core_gid);
core_signal = strappend("COREDUMP_SIGNAL=", argv[ARG_SIGNAL]);
if (core_signal)
IOVEC_SET_STRING(iovec[j++], core_signal);
core_comm = strappend("COREDUMP_COMM=", argv[ARG_COMM]);
if (core_comm)
IOVEC_SET_STRING(iovec[j++], core_comm);
if (sd_pid_get_session(pid, &t) >= 0) {
core_session = strappend("COREDUMP_SESSION=", t);
free(t);
if (core_session)
IOVEC_SET_STRING(iovec[j++], core_session);
}
if (sd_pid_get_unit(pid, &t) >= 0) {
core_unit = strappend("COREDUMP_UNIT=", t);
free(t);
if (core_unit)
IOVEC_SET_STRING(iovec[j++], core_unit);
}
if (get_process_exe(pid, &t) >= 0) {
core_exe = strappend("COREDUMP_EXE=", t);
free(t);
if (core_exe)
IOVEC_SET_STRING(iovec[j++], core_exe);
}
if (get_process_cmdline(pid, LINE_MAX, false, &t) >= 0) {
core_cmdline = strappend("COREDUMP_CMDLINE=", t);
free(t);
if (core_cmdline)
IOVEC_SET_STRING(iovec[j++], core_cmdline);
}
core_timestamp = join("COREDUMP_TIMESTAMP=", argv[ARG_TIMESTAMP], "000000", NULL);
if (core_timestamp)
IOVEC_SET_STRING(iovec[j++], core_timestamp);
IOVEC_SET_STRING(iovec[j++], "MESSAGE_ID=fc2e22bc6ee647b6b90729ab34a250b1");
IOVEC_SET_STRING(iovec[j++], "PRIORITY=2");
core_message = join("MESSAGE=Process ", argv[ARG_PID], " (", argv[ARG_COMM], ") dumped core.", NULL);
if (core_message)
IOVEC_SET_STRING(iovec[j++], core_message);
r = sd_journal_sendv(iovec, j);
if (r < 0)
log_error("Failed to send coredump: %s", strerror(-r));
finish:
free(p);
free(core_pid);
free(core_uid);
free(core_gid);
free(core_signal);
free(core_timestamp);
free(core_comm);
free(core_exe);
free(core_cmdline);
free(core_unit);
free(core_session);
free(core_message);
return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS;
}

2
src/systemd/sd-messages.h
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@ -32,6 +32,8 @@ extern "C" {
#define SD_MESSAGE_JOURNAL_STOP SD_ID128_MAKE(d9,3f,b3,c9,c2,4d,45,1a,97,ce,a6,15,ce,59,c0,0b)
#define SD_MESSAGE_JOURNAL_DROPPED SD_ID128_MAKE(a5,96,d6,fe,7b,fa,49,94,82,8e,72,30,9e,95,d6,1e)
#define SD_MESSAGE_COREDUMP SD_ID128_MAKE(fc,2e,22,bc,6e,e6,47,b6,b9,07,29,ab,34,a2,50,b1)
#ifdef __cplusplus
}
#endif

1
sysctl.d/.gitignore vendored Normal file
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@ -0,0 +1 @@
/coredump.conf

1
sysctl.d/Makefile Symbolic link
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@ -0,0 +1 @@
../src/Makefile

10
sysctl.d/coredump.conf.in Normal file
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@ -0,0 +1,10 @@
# This file is part of systemd.
#
# systemd 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.
# See sysctl.d(5) for details
kernel.core_pattern=|@rootlibexecdir@/systemd-coredump %p %u %g %s %t %e