#include <errno.h>

#include <unistd.h>

#include <stdio.h>

#include <sys/prctl.h>

#include <sys/types.h>

#include <sys/xattr.h>

#ifdef HAVE_ELFUTILS

# include <dwarf.h>

# include <elfutils/libdwfl.h>

#endif

#include "systemd/sd-journal.h"

#include "systemd/sd-login.h"

#include "log.h"

#include "util.h"

#include "fileio.h"

#include "strv.h"

#include "macro.h"

#include "mkdir.h"

#include "special.h"

#include "cgroup-util.h"

#include "journald-native.h"

#include "conf-parser.h"

#include "copy.h"

#include "stacktrace.h"

#include "path-util.h"

#include "compress.h"

#include "coredump-vacuum.h"

#ifdef HAVE_ACL

# include <sys/acl.h>

# include "acl-util.h"

#endif

#define PROCESS_SIZE_MAX ((off_t) (2LLU*1024LLU*1024LLU*1024LLU))

#define EXTERNAL_SIZE_MAX PROCESS_SIZE_MAX

#define JOURNAL_SIZE_MAX ((size_t) (767LU*1024LU*1024LU))

assert_cc(JOURNAL_SIZE_MAX <= DATA_SIZE_MAX);

enum {

INFO_PID,

INFO_UID,

INFO_GID,

INFO_SIGNAL,

INFO_TIMESTAMP,

INFO_COMM,

INFO_EXE,

_INFO_LEN

};

typedef enum CoredumpStorage {

COREDUMP_STORAGE_NONE,

COREDUMP_STORAGE_EXTERNAL,

COREDUMP_STORAGE_JOURNAL,

COREDUMP_STORAGE_BOTH,

_COREDUMP_STORAGE_MAX,

_COREDUMP_STORAGE_INVALID = -1

} CoredumpStorage;

static const char* const coredump_storage_table[_COREDUMP_STORAGE_MAX] = {

[COREDUMP_STORAGE_NONE] = "none",

[COREDUMP_STORAGE_EXTERNAL] = "external",

[COREDUMP_STORAGE_JOURNAL] = "journal",

[COREDUMP_STORAGE_BOTH] = "both",

};

DEFINE_PRIVATE_STRING_TABLE_LOOKUP(coredump_storage, CoredumpStorage);

static DEFINE_CONFIG_PARSE_ENUM(config_parse_coredump_storage, coredump_storage, CoredumpStorage, "Failed to parse storage setting");

static CoredumpStorage arg_storage = COREDUMP_STORAGE_EXTERNAL;

static bool arg_compress = true;

static off_t arg_process_size_max = PROCESS_SIZE_MAX;

static off_t arg_external_size_max = EXTERNAL_SIZE_MAX;

static size_t arg_journal_size_max = JOURNAL_SIZE_MAX;

static off_t arg_keep_free = (off_t) -1;

static off_t arg_max_use = (off_t) -1;

static int parse_config(void) {

static const ConfigTableItem items[] = {

{ "Coredump", "Storage", config_parse_coredump_storage, 0, &arg_storage },

{ "Coredump", "Compress", config_parse_bool, 0, &arg_compress },

{ "Coredump", "ProcessSizeMax", config_parse_iec_off, 0, &arg_process_size_max },

{ "Coredump", "ExternalSizeMax", config_parse_iec_off, 0, &arg_external_size_max },

{ "Coredump", "JournalSizeMax", config_parse_iec_size, 0, &arg_journal_size_max },

{ "Coredump", "KeepFree", config_parse_iec_off, 0, &arg_keep_free },

{ "Coredump", "MaxUse", config_parse_iec_off, 0, &arg_max_use },

{}

};

return config_parse_many("/etc/systemd/coredump.conf",

CONF_DIRS_NULSTR("systemd/coredump.conf"),

"Coredump\0",

config_item_table_lookup, items,

false, NULL);

}

static int fix_acl(int fd, uid_t uid) {

#ifdef HAVE_ACL

_cleanup_(acl_freep) acl_t acl = NULL;

acl_entry_t entry;

acl_permset_t permset;

assert(fd >= 0);

if (uid <= SYSTEM_UID_MAX)

return 0;

/* Make sure normal users can read (but not write or delete)

acl = acl_get_fd(fd);

if (!acl)

return log_error_errno(errno, "Failed to get ACL: %m");

if (acl_create_entry(&acl, &entry) < 0 ||

acl_set_tag_type(entry, ACL_USER) < 0 ||

acl_set_qualifier(entry, &uid) < 0) {

log_error_errno(errno, "Failed to patch ACL: %m");

return -errno;

}

if (acl_get_permset(entry, &permset) < 0 ||

acl_add_perm(permset, ACL_READ) < 0 ||

calc_acl_mask_if_needed(&acl) < 0) {

log_warning_errno(errno, "Failed to patch ACL: %m");

return -errno;

}

if (acl_set_fd(fd, acl) < 0)

return log_error_errno(errno, "Failed to apply ACL: %m");

#endif

return 0;

}

static int fix_xattr(int fd, const char *info[_INFO_LEN]) {

static const char * const xattrs[_INFO_LEN] = {

[INFO_PID] = "user.coredump.pid",

[INFO_UID] = "user.coredump.uid",

[INFO_GID] = "user.coredump.gid",

[INFO_SIGNAL] = "user.coredump.signal",

[INFO_TIMESTAMP] = "user.coredump.timestamp",

[INFO_COMM] = "user.coredump.comm",

[INFO_EXE] = "user.coredump.exe",

};

int r = 0;

unsigned i;

assert(fd >= 0);

/* Attach some metadata to coredumps via extended

for (i = 0; i < _INFO_LEN; i++) {

int k;

if (isempty(info[i]) || !xattrs[i])

continue;

k = fsetxattr(fd, xattrs[i], info[i], strlen(info[i]), XATTR_CREATE);

if (k < 0 && r == 0)

r = -errno;

}

return r;

}

#define filename_escape(s) xescape((s), "./ ")

static int fix_permissions(

int fd,

const char *filename,

const char *target,

const char *info[_INFO_LEN],

uid_t uid) {

assert(fd >= 0);

assert(filename);

assert(target);

assert(info);

/* Ignore errors on these */

fchmod(fd, 0640);

fix_acl(fd, uid);

fix_xattr(fd, info);

if (fsync(fd) < 0)

return log_error_errno(errno, "Failed to sync coredump %s: %m", filename);

if (rename(filename, target) < 0)

return log_error_errno(errno, "Failed to rename coredump %s -> %s: %m", filename, target);

return 0;

}

static int maybe_remove_external_coredump(const char *filename, off_t size) {

/* Returns 1 if might remove, 0 if will not remove, < 0 on error. */

if (IN_SET(arg_storage, COREDUMP_STORAGE_EXTERNAL, COREDUMP_STORAGE_BOTH) &&

size <= arg_external_size_max)

return 0;

if (!filename)

return 1;

if (unlink(filename) < 0 && errno != ENOENT)

return log_error_errno(errno, "Failed to unlink %s: %m", filename);

return 1;

}

static int make_filename(const char *info[_INFO_LEN], char **ret) {

_cleanup_free_ char *c = NULL, *u = NULL, *p = NULL, *t = NULL;

sd_id128_t boot;

int r;

assert(info);

c = filename_escape(info[INFO_COMM]);

if (!c)

return -ENOMEM;

u = filename_escape(info[INFO_UID]);

if (!u)

return -ENOMEM;

r = sd_id128_get_boot(&boot);

if (r < 0)

return r;

p = filename_escape(info[INFO_PID]);

if (!p)

return -ENOMEM;

t = filename_escape(info[INFO_TIMESTAMP]);

if (!t)

return -ENOMEM;

if (asprintf(ret,

"/var/lib/systemd/coredump/core.%s.%s." SD_ID128_FORMAT_STR ".%s.%s000000",

c,

u,

SD_ID128_FORMAT_VAL(boot),

p,

t) < 0)

return -ENOMEM;

return 0;

}

static int save_external_coredump(

const char *info[_INFO_LEN],

uid_t uid,

char **ret_filename,

int *ret_fd,

off_t *ret_size) {

_cleanup_free_ char *fn = NULL, *tmp = NULL;

_cleanup_close_ int fd = -1;

struct stat st;

int r;

assert(info);

assert(ret_filename);

assert(ret_fd);

assert(ret_size);

r = make_filename(info, &fn);

if (r < 0)

return log_error_errno(r, "Failed to determine coredump file name: %m");

r = tempfn_random(fn, &tmp);

if (r < 0)

return log_error_errno(r, "Failed to determine temporary file name: %m");

mkdir_p_label("/var/lib/systemd/coredump", 0755);

fd = open(tmp, O_CREAT|O_EXCL|O_RDWR|O_CLOEXEC|O_NOCTTY|O_NOFOLLOW, 0640);

if (fd < 0)

return log_error_errno(errno, "Failed to create coredump file %s: %m", tmp);

r = copy_bytes(STDIN_FILENO, fd, arg_process_size_max);

if (r == -EFBIG) {

log_error("Coredump of %s (%s) is larger than configured processing limit, refusing.", info[INFO_PID], info[INFO_COMM]);

goto fail;

} else if (IN_SET(r, -EDQUOT, -ENOSPC)) {

log_error("Not enough disk space for coredump of %s (%s), refusing.", info[INFO_PID], info[INFO_COMM]);

goto fail;

} else if (r < 0) {

log_error_errno(r, "Failed to dump coredump to file: %m");

goto fail;

}

if (fstat(fd, &st) < 0) {

log_error_errno(errno, "Failed to fstat coredump %s: %m", tmp);

goto fail;

}

if (lseek(fd, 0, SEEK_SET) == (off_t) -1) {

log_error_errno(errno, "Failed to seek on %s: %m", tmp);

goto fail;

}

#if defined(HAVE_XZ) || defined(HAVE_LZ4)

/* If we will remove the coredump anyway, do not compress. */

if (maybe_remove_external_coredump(NULL, st.st_size) == 0

&& arg_compress) {

_cleanup_free_ char *fn_compressed = NULL, *tmp_compressed = NULL;

_cleanup_close_ int fd_compressed = -1;

fn_compressed = strappend(fn, COMPRESSED_EXT);

if (!fn_compressed) {

log_oom();

goto uncompressed;

}

r = tempfn_random(fn_compressed, &tmp_compressed);

if (r < 0) {

log_error_errno(r, "Failed to determine temporary file name for %s: %m", fn_compressed);

goto uncompressed;

}

fd_compressed = open(tmp_compressed, O_CREAT|O_EXCL|O_RDWR|O_CLOEXEC|O_NOCTTY|O_NOFOLLOW, 0640);

if (fd_compressed < 0) {

log_error_errno(errno, "Failed to create file %s: %m", tmp_compressed);

goto uncompressed;

}

r = compress_stream(fd, fd_compressed, -1);

if (r < 0) {

log_error_errno(r, "Failed to compress %s: %m", tmp_compressed);

goto fail_compressed;

}

r = fix_permissions(fd_compressed, tmp_compressed, fn_compressed, info, uid);

if (r < 0)

goto fail_compressed;

/* OK, this worked, we can get rid of the uncompressed version now */

unlink_noerrno(tmp);

*ret_filename = fn_compressed; /* compressed */

*ret_fd = fd; /* uncompressed */

*ret_size = st.st_size; /* uncompressed */

fn_compressed = NULL;

fd = -1;

return 0;

fail_compressed:

unlink_noerrno(tmp_compressed);

}

uncompressed:

#endif

r = fix_permissions(fd, tmp, fn, info, uid);

if (r < 0)

goto fail;

*ret_filename = fn;

*ret_fd = fd;

*ret_size = st.st_size;

fn = NULL;

fd = -1;

return 0;

fail:

unlink_noerrno(tmp);

return r;

}

static int allocate_journal_field(int fd, size_t size, char **ret, size_t *ret_size) {

_cleanup_free_ char *field = NULL;

ssize_t n;

assert(fd >= 0);

assert(ret);

assert(ret_size);

if (lseek(fd, 0, SEEK_SET) == (off_t) -1)

return log_warning_errno(errno, "Failed to seek: %m");

field = malloc(9 + size);

if (!field) {

log_warning("Failed to allocate memory for coredump, coredump will not be stored.");

return -ENOMEM;

}

memcpy(field, "COREDUMP=", 9);

n = read(fd, field + 9, size);

if (n < 0)

return log_error_errno((int) n, "Failed to read core data: %m");

if ((size_t) n < size) {

log_error("Core data too short.");

return -EIO;

}

*ret = field;

*ret_size = size + 9;

field = NULL;

return 0;

}

static int compose_open_fds(pid_t pid, char **open_fds) {

_cleanup_closedir_ DIR *proc_fd_dir = NULL;

_cleanup_close_ int proc_fdinfo_fd = -1;

_cleanup_free_ char *buffer = NULL;

_cleanup_fclose_ FILE *stream = NULL;

const char *fddelim = "", *path;

struct dirent *dent = NULL;

size_t size = 0;

int r = 0;

assert(pid >= 0);

assert(open_fds != NULL);

path = procfs_file_alloca(pid, "fd");

proc_fd_dir = opendir(path);

if (!proc_fd_dir)

return -errno;

proc_fdinfo_fd = openat(dirfd(proc_fd_dir), "../fdinfo", O_DIRECTORY|O_NOFOLLOW|O_CLOEXEC|O_PATH);

if (proc_fdinfo_fd < 0)

return -errno;

stream = open_memstream(&buffer, &size);

if (!stream)

return -ENOMEM;

FOREACH_DIRENT(dent, proc_fd_dir, return -errno) {

_cleanup_fclose_ FILE *fdinfo = NULL;

_cleanup_free_ char *fdname = NULL;

char line[LINE_MAX];

int fd;

r = readlinkat_malloc(dirfd(proc_fd_dir), dent->d_name, &fdname);

if (r < 0)

return r;

fprintf(stream, "%s%s:%s\n", fddelim, dent->d_name, fdname);

fddelim = "\n";

/* Use the directory entry from /proc/[pid]/fd with /proc/[pid]/fdinfo */

fd = openat(proc_fdinfo_fd, dent->d_name, O_NOFOLLOW|O_CLOEXEC|O_RDONLY);

if (fd < 0)

continue;

fdinfo = fdopen(fd, "re");

if (fdinfo == NULL) {

close(fd);

continue;

}

FOREACH_LINE(line, fdinfo, break) {

fputs(line, stream);

if (!endswith(line, "\n"))

fputc('\n', stream);

}

}

errno = 0;

fclose(stream);

stream = NULL;

if (errno != 0)

return -errno;

*open_fds = buffer;

buffer = NULL;

return 0;

}

int main(int argc, char* argv[]) {

/* The small core field we allocate on the stack, to keep things simple */

char

*core_pid = NULL, *core_uid = NULL, *core_gid = NULL, *core_signal = NULL,

*core_session = NULL, *core_exe = NULL, *core_comm = NULL, *core_cmdline = NULL,

*core_cgroup = NULL, *core_cwd = NULL, *core_root = NULL, *core_unit = NULL,

*core_slice = NULL;

/* The larger ones we allocate on the heap */

_cleanup_free_ char

*core_timestamp = NULL, *core_message = NULL, *coredump_data = NULL, *core_owner_uid = NULL,

*core_open_fds = NULL, *core_proc_status = NULL, *core_proc_maps = NULL, *core_proc_limits = NULL,

*core_proc_cgroup = NULL, *core_environ = NULL;

_cleanup_free_ char *exe = NULL, *comm = NULL, *filename = NULL;

const char *info[_INFO_LEN];

_cleanup_close_ int coredump_fd = -1;

struct iovec iovec[26];

off_t coredump_size;

int r, j = 0;

uid_t uid, owner_uid;

gid_t gid;

pid_t pid;

char *t;

const char *p;

/* Make sure we never enter a loop */

prctl(PR_SET_DUMPABLE, 0);

/* First, log to a safe place, since we don't know what

log_set_target(LOG_TARGET_KMSG);

log_open();

if (argc < INFO_COMM + 1) {

log_error("Not enough arguments passed from kernel (%d, expected %d).",

argc - 1, INFO_COMM + 1 - 1);

r = -EINVAL;

goto finish;

}

/* Ignore all parse errors */

parse_config();

log_debug("Selected storage '%s'.", coredump_storage_to_string(arg_storage));

log_debug("Selected compression %s.", yes_no(arg_compress));

r = parse_uid(argv[INFO_UID + 1], &uid);

if (r < 0) {

log_error("Failed to parse UID.");

goto finish;

}

r = parse_pid(argv[INFO_PID + 1], &pid);

if (r < 0) {

log_error("Failed to parse PID.");

goto finish;

}

r = parse_gid(argv[INFO_GID + 1], &gid);

if (r < 0) {

log_error("Failed to parse GID.");

goto finish;

}

if (get_process_comm(pid, &comm) < 0) {

log_warning("Failed to get COMM, falling back to the command line.");

comm = strv_join(argv + INFO_COMM + 1, " ");

}

if (get_process_exe(pid, &exe) < 0)

log_warning("Failed to get EXE.");

info[INFO_PID] = argv[INFO_PID + 1];

info[INFO_UID] = argv[INFO_UID + 1];

info[INFO_GID] = argv[INFO_GID + 1];

info[INFO_SIGNAL] = argv[INFO_SIGNAL + 1];

info[INFO_TIMESTAMP] = argv[INFO_TIMESTAMP + 1];

info[INFO_COMM] = comm;

info[INFO_EXE] = exe;

if (cg_pid_get_unit(pid, &t) >= 0) {

if (streq(t, SPECIAL_JOURNALD_SERVICE)) {

free(t);

/* If we are journald, we cut things short,

if (arg_storage != COREDUMP_STORAGE_NONE)

arg_storage = COREDUMP_STORAGE_EXTERNAL;

r = save_external_coredump(info, uid, &filename, &coredump_fd, &coredump_size);

if (r < 0)

goto finish;

r = maybe_remove_external_coredump(filename, coredump_size);

if (r < 0)

goto finish;

log_info("Detected coredump of the journal daemon itself, diverted to %s.", filename);

goto finish;

}

core_unit = strappenda("COREDUMP_UNIT=", t);

free(t);

} else if (cg_pid_get_user_unit(pid, &t) >= 0) {

core_unit = strappenda("COREDUMP_USER_UNIT=", t);

free(t);

}

if (core_unit)

IOVEC_SET_STRING(iovec[j++], core_unit);

/* OK, now we know it's not the journal, hence we can make use

log_set_target(LOG_TARGET_JOURNAL_OR_KMSG);

log_open();

core_pid = strappenda("COREDUMP_PID=", info[INFO_PID]);

IOVEC_SET_STRING(iovec[j++], core_pid);

core_uid = strappenda("COREDUMP_UID=", info[INFO_UID]);

IOVEC_SET_STRING(iovec[j++], core_uid);

core_gid = strappenda("COREDUMP_GID=", info[INFO_GID]);

IOVEC_SET_STRING(iovec[j++], core_gid);

core_signal = strappenda("COREDUMP_SIGNAL=", info[INFO_SIGNAL]);

IOVEC_SET_STRING(iovec[j++], core_signal);

if (sd_pid_get_session(pid, &t) >= 0) {

core_session = strappenda("COREDUMP_SESSION=", t);

free(t);

IOVEC_SET_STRING(iovec[j++], core_session);

}

if (sd_pid_get_owner_uid(pid, &owner_uid) >= 0) {

r = asprintf(&core_owner_uid,

"COREDUMP_OWNER_UID=" UID_FMT, owner_uid);

if (r > 0)

IOVEC_SET_STRING(iovec[j++], core_owner_uid);

}

if (sd_pid_get_slice(pid, &t) >= 0) {

core_slice = strappenda("COREDUMP_SLICE=", t);

free(t);

IOVEC_SET_STRING(iovec[j++], core_slice);

}

if (comm) {

core_comm = strappenda("COREDUMP_COMM=", comm);

IOVEC_SET_STRING(iovec[j++], core_comm);

}

if (exe) {

core_exe = strappenda("COREDUMP_EXE=", exe);

IOVEC_SET_STRING(iovec[j++], core_exe);

}

if (get_process_cmdline(pid, 0, false, &t) >= 0) {

core_cmdline = strappenda("COREDUMP_CMDLINE=", t);

free(t);

IOVEC_SET_STRING(iovec[j++], core_cmdline);

}

if (cg_pid_get_path_shifted(pid, NULL, &t) >= 0) {

core_cgroup = strappenda("COREDUMP_CGROUP=", t);

free(t);

IOVEC_SET_STRING(iovec[j++], core_cgroup);

}

if (compose_open_fds(pid, &t) >= 0) {

core_open_fds = strappend("COREDUMP_OPEN_FDS=", t);

free(t);

if (core_open_fds)

IOVEC_SET_STRING(iovec[j++], core_open_fds);

}

p = procfs_file_alloca(pid, "status");

if (read_full_file(p, &t, NULL) >= 0) {

core_proc_status = strappend("COREDUMP_PROC_STATUS=", t);

free(t);

if (core_proc_status)

IOVEC_SET_STRING(iovec[j++], core_proc_status);

}

p = procfs_file_alloca(pid, "maps");

if (read_full_file(p, &t, NULL) >= 0) {

core_proc_maps = strappend("COREDUMP_PROC_MAPS=", t);

free(t);

if (core_proc_maps)

IOVEC_SET_STRING(iovec[j++], core_proc_maps);

}

p = procfs_file_alloca(pid, "limits");

if (read_full_file(p, &t, NULL) >= 0) {

core_proc_limits = strappend("COREDUMP_PROC_LIMITS=", t);

free(t);

if (core_proc_limits)

IOVEC_SET_STRING(iovec[j++], core_proc_limits);

}

p = procfs_file_alloca(pid, "cgroup");

if (read_full_file(p, &t, NULL) >=0) {

core_proc_cgroup = strappend("COREDUMP_PROC_CGROUP=", t);

free(t);

if (core_proc_cgroup)

IOVEC_SET_STRING(iovec[j++], core_proc_cgroup);

}

if (get_process_cwd(pid, &t) >= 0) {

core_cwd = strappenda("COREDUMP_CWD=", t);

free(t);

IOVEC_SET_STRING(iovec[j++], core_cwd);

}

if (get_process_root(pid, &t) >= 0) {

core_root = strappenda("COREDUMP_ROOT=", t);

free(t);

IOVEC_SET_STRING(iovec[j++], core_root);

}

if (get_process_environ(pid, &t) >= 0) {

core_environ = strappend("COREDUMP_ENVIRON=", t);

free(t);

if (core_environ)

IOVEC_SET_STRING(iovec[j++], core_environ);

}

core_timestamp = strjoin("COREDUMP_TIMESTAMP=", info[INFO_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");

/* Vacuum before we write anything again */

coredump_vacuum(-1, arg_keep_free, arg_max_use);

/* Always stream the coredump to disk, if that's possible */

r = save_external_coredump(info, uid, &filename, &coredump_fd, &coredump_size);

if (r < 0)

/* skip whole core dumping part */

goto log;

/* If we don't want to keep the coredump on disk, remove it

r = maybe_remove_external_coredump(filename, coredump_size);

if (r < 0)

goto finish;

if (r == 0) {

const char *coredump_filename;

coredump_filename = strappenda("COREDUMP_FILENAME=", filename);

IOVEC_SET_STRING(iovec[j++], coredump_filename);

}

/* Vacuum again, but exclude the coredump we just created */

coredump_vacuum(coredump_fd, arg_keep_free, arg_max_use);

/* Now, let's drop privileges to become the user who owns the

if (setresgid(gid, gid, gid) < 0 ||

setresuid(uid, uid, uid) < 0) {

log_error_errno(errno, "Failed to drop privileges: %m");

r = -errno;

goto finish;

}

#ifdef HAVE_ELFUTILS

/* Try to get a strack trace if we can */

if (coredump_size <= arg_process_size_max) {

_cleanup_free_ char *stacktrace = NULL;

r = coredump_make_stack_trace(coredump_fd, exe, &stacktrace);

if (r >= 0)

core_message = strjoin("MESSAGE=Process ", info[INFO_PID], " (", comm, ") of user ", info[INFO_UID], " dumped core.\n\n", stacktrace, NULL);

else if (r == -EINVAL)

log_warning("Failed to generate stack trace: %s", dwfl_errmsg(dwfl_errno()));

else

log_warning_errno(r, "Failed to generate stack trace: %m");

}

if (!core_message)

#endif

log:

core_message = strjoin("MESSAGE=Process ", info[INFO_PID], " (", comm, ") of user ", info[INFO_UID], " dumped core.", NULL);

if (core_message)

IOVEC_SET_STRING(iovec[j++], core_message);

/* Optionally store the entire coredump in the journal */

if (IN_SET(arg_storage, COREDUMP_STORAGE_JOURNAL, COREDUMP_STORAGE_BOTH) &&

coredump_size <= (off_t) arg_journal_size_max) {

size_t sz;

/* Store the coredump itself in the journal */

r = allocate_journal_field(coredump_fd, (size_t) coredump_size, &coredump_data, &sz);

if (r >= 0) {

iovec[j].iov_base = coredump_data;

iovec[j].iov_len = sz;

j++;

}

}

r = sd_journal_sendv(iovec, j);

if (r < 0)

log_error_errno(r, "Failed to log coredump: %m");

finish:

return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS;

}