int write_env_file(const char *fname, char **l) {
_cleanup_fclose_ FILE *f = NULL;
_cleanup_free_ char *p = NULL;
char **i;
int r;
assert(fname);
r = fopen_temporary(fname, &f, &p);
if (r < 0)
return r;
fchmod_umask(fileno(f), 0644);
STRV_FOREACH(i, l)
write_env_var(f, *i);
r = fflush_and_check(f);
if (r >= 0) {
if (rename(p, fname) >= 0)
return 0;
r = -errno;
}
unlink(p);
return r;
}
static int write_resolv_conf_contents(FILE *f, OrderedSet *dns, OrderedSet *domains) {
Iterator i;
fputs_unlocked("# This file is managed by man:systemd-resolved(8). Do not edit.\n#\n"
"# This is a dynamic resolv.conf file for connecting local clients directly to\n"
"# all known DNS servers.\n#\n"
"# Third party programs must not access this file directly, but only through the\n"
"# symlink at /etc/resolv.conf. To manage man:resolv.conf(5) in a different way,\n"
"# replace this symlink by a static file or a different symlink.\n#\n"
"# See man:systemd-resolved.service(8) for details about the supported modes of\n"
"# operation for /etc/resolv.conf.\n\n", f);
if (ordered_set_isempty(dns))
fputs_unlocked("# No DNS servers known.\n", f);
else {
unsigned count = 0;
DnsServer *s;
ORDERED_SET_FOREACH(s, dns, i)
write_resolv_conf_server(s, f, &count);
}
if (!ordered_set_isempty(domains))
write_resolv_conf_search(domains, f);
return fflush_and_check(f);
}
int write_string_stream_ts(
FILE *f,
const char *line,
WriteStringFileFlags flags,
struct timespec *ts) {
assert(f);
assert(line);
fputs(line, f);
if (!(flags & WRITE_STRING_FILE_AVOID_NEWLINE) && !endswith(line, "\n"))
fputc('\n', f);
if (ts) {
struct timespec twice[2] = {*ts, *ts};
if (futimens(fileno(f), twice) < 0)
return -errno;
}
if (flags & WRITE_STRING_FILE_SYNC)
return fflush_sync_and_check(f);
else
return fflush_and_check(f);
}
int calendar_spec_to_string(const CalendarSpec *c, char **p) {
char *buf = NULL;
size_t sz = 0;
FILE *f;
int r;
assert(c);
assert(p);
f = open_memstream(&buf, &sz);
if (!f)
return -ENOMEM;
if (c->weekdays_bits > 0 && c->weekdays_bits <= BITS_WEEKDAYS) {
format_weekdays(f, c);
fputc(' ', f);
}
format_chain(f, 4, c->year, false);
fputc('-', f);
format_chain(f, 2, c->month, false);
fputc(c->end_of_month ? '~' : '-', f);
format_chain(f, 2, c->day, false);
fputc(' ', f);
format_chain(f, 2, c->hour, false);
fputc(':', f);
format_chain(f, 2, c->minute, false);
fputc(':', f);
format_chain(f, 2, c->microsecond, true);
if (c->utc)
fputs(" UTC", f);
else if (IN_SET(c->dst, 0, 1)) {
/* If daylight saving is explicitly on or off, let's show the used timezone. */
tzset();
if (!isempty(tzname[c->dst])) {
fputc(' ', f);
fputs(tzname[c->dst], f);
}
}
r = fflush_and_check(f);
if (r < 0) {
free(buf);
fclose(f);
return r;
}
fclose(f);
*p = buf;
return 0;
}
int write_string_stream(FILE *f, const char *line, bool enforce_newline) {
assert(f);
assert(line);
fputs(line, f);
if (enforce_newline && !endswith(line, "\n"))
fputc('\n', f);
return fflush_and_check(f);
}
static int write_fsck_sysroot_service(const char *dir, const char *what) {
_cleanup_free_ char *device = NULL, *escaped = NULL, *escaped2 = NULL;
_cleanup_fclose_ FILE *f = NULL;
const char *unit;
int r;
escaped = specifier_escape(what);
if (!escaped)
return log_oom();
escaped2 = cescape(escaped);
if (!escaped2)
return log_oom();
unit = strjoina(dir, "/systemd-fsck-root.service");
log_debug("Creating %s", unit);
r = unit_name_from_path(what, ".device", &device);
if (r < 0)
return log_error_errno(r, "Failed to convert device \"%s\" to unit name: %m", what);
f = fopen(unit, "wxe");
if (!f)
return log_error_errno(errno, "Failed to create unit file %s: %m", unit);
fprintf(f,
"# Automatically generated by %1$s\n\n"
"[Unit]\n"
"Description=File System Check on %2$s\n"
"Documentation=man:systemd-fsck-root.service(8)\n"
"DefaultDependencies=no\n"
"BindsTo=%3$s\n"
"After=initrd-root-device.target local-fs-pre.target %3$s\n"
"Before=shutdown.target\n"
"\n"
"[Service]\n"
"Type=oneshot\n"
"RemainAfterExit=yes\n"
"ExecStart=" SYSTEMD_FSCK_PATH " %4$s\n"
"TimeoutSec=0\n",
program_invocation_short_name,
escaped,
device,
escaped2);
r = fflush_and_check(f);
if (r < 0)
return log_error_errno(r, "Failed to write unit file %s: %m", unit);
return 0;
}
int write_string_stream_ts(
FILE *f,
const char *line,
WriteStringFileFlags flags,
struct timespec *ts) {
bool needs_nl;
int r;
assert(f);
assert(line);
if (ferror(f))
return -EIO;
needs_nl = !(flags & WRITE_STRING_FILE_AVOID_NEWLINE) && !endswith(line, "\n");
if (needs_nl && (flags & WRITE_STRING_FILE_DISABLE_BUFFER)) {
/* If STDIO buffering was disabled, then let's append the newline character to the string itself, so
* that the write goes out in one go, instead of two */
line = strjoina(line, "\n");
needs_nl = false;
}
if (fputs(line, f) == EOF)
return -errno;
if (needs_nl)
if (fputc('\n', f) == EOF)
return -errno;
if (flags & WRITE_STRING_FILE_SYNC)
r = fflush_sync_and_check(f);
else
r = fflush_and_check(f);
if (r < 0)
return r;
if (ts) {
struct timespec twice[2] = {*ts, *ts};
if (futimens(fileno(f), twice) < 0)
return -errno;
}
return 0;
}
static int write_root_shadow(const char *path, const struct spwd *p) {
_cleanup_fclose_ FILE *f = NULL;
assert(path);
assert(p);
RUN_WITH_UMASK(0777)
f = fopen(path, "wex");
if (!f)
return -errno;
errno = 0;
if (putspent(p, f) != 0)
return errno ? -errno : -EIO;
return fflush_and_check(f);
}
int calendar_spec_to_string(const CalendarSpec *c, char **p) {
char *buf = NULL;
size_t sz = 0;
FILE *f;
int r;
assert(c);
assert(p);
f = open_memstream(&buf, &sz);
if (!f)
return -ENOMEM;
if (c->weekdays_bits > 0 && c->weekdays_bits <= BITS_WEEKDAYS) {
format_weekdays(f, c);
fputc(' ', f);
}
format_chain(f, 4, c->year);
fputc('-', f);
format_chain(f, 2, c->month);
fputc('-', f);
format_chain(f, 2, c->day);
fputc(' ', f);
format_chain(f, 2, c->hour);
fputc(':', f);
format_chain(f, 2, c->minute);
fputc(':', f);
format_chain(f, 2, c->second);
if (c->utc)
fputs(" UTC", f);
r = fflush_and_check(f);
if (r < 0) {
free(buf);
fclose(f);
return r;
}
fclose(f);
*p = buf;
return 0;
}
static int add_swap(const char *path) {
_cleanup_free_ char *name = NULL, *unit = NULL, *lnk = NULL;
_cleanup_fclose_ FILE *f = NULL;
int r;
assert(path);
log_debug("Adding swap: %s", path);
r = unit_name_from_path(path, ".swap", &name);
if (r < 0)
return log_error_errno(r, "Failed to generate unit name: %m");
unit = strjoin(arg_dest, "/", name, NULL);
if (!unit)
return log_oom();
f = fopen(unit, "wxe");
if (!f)
return log_error_errno(errno, "Failed to create unit file %s: %m", unit);
fprintf(f,
"# Automatically generated by systemd-gpt-auto-generator\n\n"
"[Unit]\n"
"Description=Swap Partition\n"
"Documentation=man:systemd-gpt-auto-generator(8)\n\n"
"[Swap]\n"
"What=%s\n",
path);
r = fflush_and_check(f);
if (r < 0)
return log_error_errno(r, "Failed to write unit file %s: %m", unit);
lnk = strjoin(arg_dest, "/" SPECIAL_SWAP_TARGET ".wants/", name, NULL);
if (!lnk)
return log_oom();
mkdir_parents_label(lnk, 0755);
if (symlink(unit, lnk) < 0)
return log_error_errno(errno, "Failed to create symlink %s: %m", lnk);
return 0;
}
static int write_stub_resolv_conf_contents(FILE *f, OrderedSet *dns, OrderedSet *domains) {
fputs_unlocked("# This file is managed by man:systemd-resolved(8). Do not edit.\n"
"#\n"
"# This is a dynamic resolv.conf file for connecting local clients to the\n"
"# internal DNS stub resolver of systemd-resolved. This file lists all\n"
"# configured search domains.\n"
"#\n"
"# Run \"resolvectl status\" to see details about the uplink DNS servers\n"
"# currently in use.\n"
"#\n"
"# Third party programs must not access this file directly, but only through the\n"
"# symlink at /etc/resolv.conf. To manage man:resolv.conf(5) in a different way,\n"
"# replace this symlink by a static file or a different symlink.\n"
"#\n"
"# See man:systemd-resolved.service(8) for details about the supported modes of\n"
"# operation for /etc/resolv.conf.\n"
"\n"
"nameserver 127.0.0.53\n", f);
if (!ordered_set_isempty(domains))
write_resolv_conf_search(domains, f);
return fflush_and_check(f);
}
static int stdout_stream_save(StdoutStream *s) {
_cleanup_free_ char *temp_path = NULL;
_cleanup_fclose_ FILE *f = NULL;
int r;
assert(s);
if (s->state != STDOUT_STREAM_RUNNING)
return 0;
if (!s->state_file) {
struct stat st;
r = fstat(s->fd, &st);
if (r < 0)
return log_warning_errno(errno, "Failed to stat connected stream: %m");
/* We use device and inode numbers as identifier for the stream */
if (asprintf(&s->state_file, "/run/systemd/journal/streams/%lu:%lu", (unsigned long) st.st_dev, (unsigned long) st.st_ino) < 0)
return log_oom();
}
mkdir_p("/run/systemd/journal/streams", 0755);
r = fopen_temporary(s->state_file, &f, &temp_path);
if (r < 0)
goto fail;
fprintf(f,
"# This is private data. Do not parse\n"
"PRIORITY=%i\n"
"LEVEL_PREFIX=%i\n"
"FORWARD_TO_SYSLOG=%i\n"
"FORWARD_TO_KMSG=%i\n"
"FORWARD_TO_CONSOLE=%i\n"
"STREAM_ID=%s\n",
s->priority,
s->level_prefix,
s->forward_to_syslog,
s->forward_to_kmsg,
s->forward_to_console,
s->id_field + strlen("_STREAM_ID="));
if (!isempty(s->identifier)) {
_cleanup_free_ char *escaped;
escaped = cescape(s->identifier);
if (!escaped) {
r = -ENOMEM;
goto fail;
}
fprintf(f, "IDENTIFIER=%s\n", escaped);
}
if (!isempty(s->unit_id)) {
_cleanup_free_ char *escaped;
escaped = cescape(s->unit_id);
if (!escaped) {
r = -ENOMEM;
goto fail;
}
fprintf(f, "UNIT=%s\n", escaped);
}
r = fflush_and_check(f);
if (r < 0)
goto fail;
if (rename(temp_path, s->state_file) < 0) {
r = -errno;
goto fail;
}
if (!s->fdstore && !s->in_notify_queue) {
LIST_PREPEND(stdout_stream_notify_queue, s->server->stdout_streams_notify_queue, s);
s->in_notify_queue = true;
if (s->server->notify_event_source) {
r = sd_event_source_set_enabled(s->server->notify_event_source, SD_EVENT_ON);
if (r < 0)
log_warning_errno(r, "Failed to enable notify event source: %m");
}
}
return 0;
fail:
(void) unlink(s->state_file);
if (temp_path)
(void) unlink(temp_path);
return log_error_errno(r, "Failed to save stream data %s: %m", s->state_file);
}
int generator_hook_up_mkfs(
const char *dir,
const char *what,
const char *where,
const char *type) {
_cleanup_free_ char *node = NULL, *unit = NULL, *escaped = NULL, *where_unit = NULL;
_cleanup_fclose_ FILE *f = NULL;
const char *unit_file;
int r;
node = fstab_node_to_udev_node(what);
if (!node)
return log_oom();
/* Nothing to work on. */
if (!is_device_path(node)) {
log_error("Cannot format something that is not a device node: %s", node);
return -EINVAL;
}
if (!type || streq(type, "auto")) {
log_error("Cannot format partition %s, filesystem type is not specified", node);
return -EINVAL;
}
r = unit_name_from_path_instance("systemd-mkfs", node, ".service", &unit);
if (r < 0)
return log_error_errno(r, "Failed to make unit instance name from path \"%s\": %m",
node);
unit_file = strjoina(dir, "/", unit);
log_debug("Creating %s", unit_file);
escaped = cescape(node);
if (!escaped)
return log_oom();
r = unit_name_from_path(where, ".mount", &where_unit);
if (r < 0)
return log_error_errno(r, "Failed to make unit name from path \"%s\": %m",
where);
f = fopen(unit_file, "wxe");
if (!f)
return log_error_errno(errno, "Failed to create unit file %s: %m",
unit_file);
fprintf(f,
"# Automatically generated by %s\n\n"
"[Unit]\n"
"Description=Make File System on %%f\n"
"Documentation=man:[email protected](8)\n"
"DefaultDependencies=no\n"
"BindsTo=%%i.device\n"
"After=%%i.device\n"
/* fsck might or might not be used, so let's be safe and order
* ourselves before both [email protected] and the mount unit. */
"Before=systemd-fsck@%%i.service\n"
"Before=%s\n"
"Before=shutdown.target\n"
"\n"
"[Service]\n"
"Type=oneshot\n"
"RemainAfterExit=yes\n"
"ExecStart="SYSTEMD_MAKEFS_PATH " %s %s\n"
"TimeoutSec=0\n",
program_invocation_short_name,
where_unit,
type,
escaped);
// XXX: what about local-fs-pre.target?
r = fflush_and_check(f);
if (r < 0)
return log_error_errno(r, "Failed to write unit file %s: %m", unit_file);
return generator_add_symlink(dir, where_unit, "requires", unit);
}
int generator_hook_up_mkswap(
const char *dir,
const char *what) {
_cleanup_free_ char *node = NULL, *unit = NULL, *escaped = NULL, *where_unit = NULL;
_cleanup_fclose_ FILE *f = NULL;
const char *unit_file;
int r;
node = fstab_node_to_udev_node(what);
if (!node)
return log_oom();
/* Nothing to work on. */
if (!is_device_path(node)) {
log_error("Cannot format something that is not a device node: %s", node);
return -EINVAL;
}
r = unit_name_from_path_instance("systemd-mkswap", node, ".service", &unit);
if (r < 0)
return log_error_errno(r, "Failed to make unit instance name from path \"%s\": %m",
node);
unit_file = strjoina(dir, "/", unit);
log_debug("Creating %s", unit_file);
escaped = cescape(node);
if (!escaped)
return log_oom();
r = unit_name_from_path(what, ".swap", &where_unit);
if (r < 0)
return log_error_errno(r, "Failed to make unit name from path \"%s\": %m",
what);
f = fopen(unit_file, "wxe");
if (!f)
return log_error_errno(errno, "Failed to create unit file %s: %m",
unit_file);
fprintf(f,
"# Automatically generated by %s\n\n"
"[Unit]\n"
"Description=Make Swap on %%f\n"
"Documentation=man:[email protected](8)\n"
"DefaultDependencies=no\n"
"BindsTo=%%i.device\n"
"After=%%i.device\n"
"Before=%s\n"
"Before=shutdown.target\n"
"\n"
"[Service]\n"
"Type=oneshot\n"
"RemainAfterExit=yes\n"
"ExecStart="SYSTEMD_MAKEFS_PATH " swap %s\n"
"TimeoutSec=0\n",
program_invocation_short_name,
where_unit,
escaped);
r = fflush_and_check(f);
if (r < 0)
return log_error_errno(r, "Failed to write unit file %s: %m", unit_file);
return generator_add_symlink(dir, where_unit, "requires", unit);
}
static int x11_write_data(Context *c) {
_cleanup_fclose_ FILE *f = NULL;
_cleanup_free_ char *temp_path = NULL;
int r;
if (isempty(c->x11_layout) &&
isempty(c->x11_model) &&
isempty(c->x11_variant) &&
isempty(c->x11_options)) {
if (unlink("/etc/X11/xorg.conf.d/00-keyboard.conf") < 0)
return errno == ENOENT ? 0 : -errno;
return 0;
}
mkdir_p_label("/etc/X11/xorg.conf.d", 0755);
r = fopen_temporary("/etc/X11/xorg.conf.d/00-keyboard.conf", &f, &temp_path);
if (r < 0)
return r;
fchmod(fileno(f), 0644);
fputs("# Read and parsed by systemd-localed. It's probably wise not to edit this file\n"
"# manually too freely.\n"
"Section \"InputClass\"\n"
" Identifier \"system-keyboard\"\n"
" MatchIsKeyboard \"on\"\n", f);
if (!isempty(c->x11_layout))
fprintf(f, " Option \"XkbLayout\" \"%s\"\n", c->x11_layout);
if (!isempty(c->x11_model))
fprintf(f, " Option \"XkbModel\" \"%s\"\n", c->x11_model);
if (!isempty(c->x11_variant))
fprintf(f, " Option \"XkbVariant\" \"%s\"\n", c->x11_variant);
if (!isempty(c->x11_options))
fprintf(f, " Option \"XkbOptions\" \"%s\"\n", c->x11_options);
fputs("EndSection\n", f);
r = fflush_and_check(f);
if (r < 0)
goto fail;
if (rename(temp_path, "/etc/X11/xorg.conf.d/00-keyboard.conf") < 0) {
r = -errno;
goto fail;
}
return 0;
fail:
(void) unlink("/etc/X11/xorg.conf.d/00-keyboard.conf");
if (temp_path)
(void) unlink(temp_path);
return r;
}
static int add_swap(
const char *what,
struct mntent *me,
MountpointFlags flags) {
_cleanup_free_ char *name = NULL;
_cleanup_fclose_ FILE *f = NULL;
int r;
assert(what);
assert(me);
if (access("/proc/swaps", F_OK) < 0) {
log_info("Swap not supported, ignoring fstab swap entry for %s.", what);
return 0;
}
if (detect_container() > 0) {
log_info("Running in a container, ignoring fstab swap entry for %s.", what);
return 0;
}
r = unit_name_from_path(what, ".swap", &name);
if (r < 0)
return log_error_errno(r, "Failed to generate unit name: %m");
r = generator_open_unit_file(arg_dest, "/etc/fstab", name, &f);
if (r < 0)
return r;
fputs("# Automatically generated by systemd-fstab-generator\n\n"
"[Unit]\n"
"SourcePath=/etc/fstab\n"
"Documentation=man:fstab(5) man:systemd-fstab-generator(8)\n\n"
"[Swap]\n", f);
r = write_what(f, what);
if (r < 0)
return r;
r = write_options(f, me->mnt_opts);
if (r < 0)
return r;
r = fflush_and_check(f);
if (r < 0)
return log_error_errno(r, "Failed to write unit file %s: %m", name);
/* use what as where, to have a nicer error message */
r = generator_write_timeouts(arg_dest, what, what, me->mnt_opts, NULL);
if (r < 0)
return r;
if (flags & MAKEFS) {
r = generator_hook_up_mkswap(arg_dest, what);
if (r < 0)
return r;
}
if (flags & GROWFS)
/* TODO: swap devices must be wiped and recreated */
log_warning("%s: growing swap devices is currently unsupported.", what);
if (!(flags & NOAUTO)) {
r = generator_add_symlink(arg_dest, SPECIAL_SWAP_TARGET,
(flags & NOFAIL) ? "wants" : "requires", name);
if (r < 0)
return r;
}
return 0;
}
static int create_device(void) {
_cleanup_free_ char *u = NULL, *v = NULL, *d = NULL, *e = NULL, *u_escaped = NULL, *v_escaped = NULL, *root_hash_escaped = NULL;
_cleanup_fclose_ FILE *f = NULL;
const char *to;
int r;
/* If all three pieces of information are missing, then verity is turned off */
if (!arg_root_hash && !arg_data_what && !arg_hash_what)
return 0;
/* if one of them is missing however, the data is simply incomplete and this is an error */
if (!arg_root_hash)
log_error("Verity information incomplete, root hash unspecified.");
if (!arg_data_what)
log_error("Verity information incomplete, root data device unspecified.");
if (!arg_hash_what)
log_error("Verity information incomplete, root hash device unspecified.");
if (!arg_root_hash || !arg_data_what || !arg_hash_what)
return -EINVAL;
log_debug("Using root verity data device %s,\n"
" hash device %s,\n"
" and root hash %s.", arg_data_what, arg_hash_what, arg_root_hash);
u = fstab_node_to_udev_node(arg_data_what);
if (!u)
return log_oom();
v = fstab_node_to_udev_node(arg_hash_what);
if (!v)
return log_oom();
u_escaped = specifier_escape(u);
if (!u_escaped)
return log_oom();
v_escaped = specifier_escape(v);
if (!v_escaped)
return log_oom();
r = unit_name_from_path(u, ".device", &d);
if (r < 0)
return log_error_errno(r, "Failed to generate unit name: %m");
r = unit_name_from_path(v, ".device", &e);
if (r < 0)
return log_error_errno(r, "Failed to generate unit name: %m");
root_hash_escaped = specifier_escape(arg_root_hash);
if (!root_hash_escaped)
return log_oom();
r = generator_open_unit_file(arg_dest, NULL, SYSTEMD_VERITYSETUP_SERVICE, &f);
if (r < 0)
return r;
fprintf(f,
"[Unit]\n"
"Description=Integrity Protection Setup for %%I\n"
"Documentation=man:systemd-veritysetup-generator(8) man:[email protected](8)\n"
"SourcePath=/proc/cmdline\n"
"DefaultDependencies=no\n"
"Conflicts=umount.target\n"
"BindsTo=%s %s\n"
"IgnoreOnIsolate=true\n"
"After=cryptsetup-pre.target %s %s\n"
"Before=cryptsetup.target umount.target\n"
"\n[Service]\n"
"Type=oneshot\n"
"RemainAfterExit=yes\n"
"ExecStart=" ROOTLIBEXECDIR "/systemd-veritysetup attach root '%s' '%s' '%s'\n"
"ExecStop=" ROOTLIBEXECDIR "/systemd-veritysetup detach root\n",
d, e,
d, e,
u_escaped, v_escaped, root_hash_escaped);
r = fflush_and_check(f);
if (r < 0)
return log_error_errno(r, "Failed to write file unit "SYSTEMD_VERITYSETUP_SERVICE": %m");
to = strjoina(arg_dest, "/cryptsetup.target.requires/" SYSTEMD_VERITYSETUP_SERVICE);
(void) mkdir_parents(to, 0755);
if (symlink("../" SYSTEMD_VERITYSETUP_SERVICE, to) < 0)
return log_error_errno(errno, "Failed to create symlink %s: %m", to);
return 0;
}
static int add_swap(
const char *what,
struct mntent *me,
bool noauto,
bool nofail) {
_cleanup_free_ char *name = NULL, *unit = NULL, *lnk = NULL, *filtered = NULL;
_cleanup_fclose_ FILE *f = NULL;
int r, pri = -1;
const char *opts;
assert(what);
assert(me);
if (access("/proc/swaps", F_OK) < 0) {
log_info("Swap not supported, ignoring fstab swap entry for %s.", what);
return 0;
}
if (detect_container(NULL) > 0) {
log_info("Running in a container, ignoring fstab swap entry for %s.", what);
return 0;
}
opts = me->mnt_opts;
r = fstab_find_pri(opts, &pri);
if (r < 0) {
log_error_errno(r, "Failed to parse priority, ignoring: %m");
/* Remove invalid pri field */
r = fstab_filter_options(opts, "pri\0", NULL, NULL, &filtered);
if (r < 0)
return log_error_errno(r, "Failed to parse options: %m");
opts = filtered;
}
name = unit_name_from_path(what, ".swap");
if (!name)
return log_oom();
unit = strjoin(arg_dest, "/", name, NULL);
if (!unit)
return log_oom();
f = fopen(unit, "wxe");
if (!f) {
if (errno == EEXIST)
log_error("Failed to create swap unit file %s, as it already exists. Duplicate entry in /etc/fstab?", unit);
else
log_error_errno(errno, "Failed to create unit file %s: %m", unit);
return -errno;
}
fprintf(f,
"# Automatically generated by systemd-fstab-generator\n\n"
"[Unit]\n"
"SourcePath=/etc/fstab\n"
"Documentation=man:fstab(5) man:systemd-fstab-generator(8)\n\n"
"[Swap]\n"
"What=%s\n",
what);
/* Note that we currently pass the priority field twice, once
* in Priority=, and once in Options= */
if (pri >= 0)
fprintf(f, "Priority=%i\n", pri);
if (!isempty(opts) && !streq(opts, "defaults"))
fprintf(f, "Options=%s\n", opts);
r = fflush_and_check(f);
if (r < 0)
return log_error_errno(r, "Failed to write unit file %s: %m", unit);
/* use what as where, to have a nicer error message */
r = generator_write_timeouts(arg_dest, what, what, opts, NULL);
if (r < 0)
return r;
if (!noauto) {
lnk = strjoin(arg_dest, "/" SPECIAL_SWAP_TARGET,
nofail ? ".wants/" : ".requires/", name, NULL);
if (!lnk)
return log_oom();
mkdir_parents_label(lnk, 0755);
if (symlink(unit, lnk) < 0)
return log_error_errno(errno, "Failed to create symlink %s: %m", lnk);
}
return 0;
}
static int copy_file(const char *from, const char *to, bool force) {
_cleanup_fclose_ FILE *f = NULL, *g = NULL;
char *p;
int r;
struct timespec t[2];
struct stat st;
assert(from);
assert(to);
f = fopen(from, "re");
if (!f)
return log_error_errno(errno, "Failed to open \"%s\" for reading: %m", from);
if (!force) {
/* If this is an update, then let's compare versions first */
r = version_check(fileno(f), from, to);
if (r < 0)
return r;
}
p = strjoina(to, "~");
g = fopen(p, "wxe");
if (!g) {
/* Directory doesn't exist yet? Then let's skip this... */
if (!force && errno == ENOENT)
return 0;
return log_error_errno(errno, "Failed to open \"%s\" for writing: %m", to);
}
rewind(f);
do {
size_t k;
uint8_t buf[32*1024];
k = fread(buf, 1, sizeof(buf), f);
if (ferror(f)) {
r = log_error_errno(EIO, "Failed to read \"%s\": %m", from);
goto error;
}
if (k == 0)
break;
fwrite(buf, 1, k, g);
if (ferror(g)) {
r = log_error_errno(EIO, "Failed to write \"%s\": %m", to);
goto error;
}
} while (!feof(f));
r = fflush_and_check(g);
if (r < 0) {
log_error_errno(r, "Failed to write \"%s\": %m", to);
goto error;
}
r = fstat(fileno(f), &st);
if (r < 0) {
r = log_error_errno(errno, "Failed to get file timestamps of \"%s\": %m", from);
goto error;
}
t[0] = st.st_atim;
t[1] = st.st_mtim;
r = futimens(fileno(g), t);
if (r < 0) {
r = log_error_errno(errno, "Failed to set file timestamps on \"%s\": %m", p);
goto error;
}
if (rename(p, to) < 0) {
r = log_error_errno(errno, "Failed to rename \"%s\" to \"%s\": %m", p, to);
goto error;
}
log_info("Copied \"%s\" to \"%s\".", from, to);
return 0;
error:
(void) unlink(p);
return r;
}
static int create_disk(
const char *name,
const char *device,
const char *password,
const char *options) {
_cleanup_free_ char *p = NULL, *n = NULL, *d = NULL, *u = NULL, *e = NULL,
*filtered = NULL, *u_escaped = NULL, *password_escaped = NULL, *filtered_escaped = NULL, *name_escaped = NULL;
_cleanup_fclose_ FILE *f = NULL;
const char *dmname;
bool noauto, nofail, tmp, swap, netdev;
int r;
assert(name);
assert(device);
noauto = fstab_test_yes_no_option(options, "noauto\0" "auto\0");
nofail = fstab_test_yes_no_option(options, "nofail\0" "fail\0");
tmp = fstab_test_option(options, "tmp\0");
swap = fstab_test_option(options, "swap\0");
netdev = fstab_test_option(options, "_netdev\0");
if (tmp && swap) {
log_error("Device '%s' cannot be both 'tmp' and 'swap'. Ignoring.", name);
return -EINVAL;
}
name_escaped = specifier_escape(name);
if (!name_escaped)
return log_oom();
e = unit_name_escape(name);
if (!e)
return log_oom();
r = unit_name_build("systemd-cryptsetup", e, ".service", &n);
if (r < 0)
return log_error_errno(r, "Failed to generate unit name: %m");
p = strjoin(arg_dest, "/", n);
if (!p)
return log_oom();
u = fstab_node_to_udev_node(device);
if (!u)
return log_oom();
u_escaped = specifier_escape(u);
if (!u_escaped)
return log_oom();
r = unit_name_from_path(u, ".device", &d);
if (r < 0)
return log_error_errno(r, "Failed to generate unit name: %m");
password_escaped = specifier_escape(password);
if (!password_escaped)
return log_oom();
f = fopen(p, "wxe");
if (!f)
return log_error_errno(errno, "Failed to create unit file %s: %m", p);
fprintf(f,
"# Automatically generated by systemd-cryptsetup-generator\n\n"
"[Unit]\n"
"Description=Cryptography Setup for %%I\n"
"Documentation=man:crypttab(5) man:systemd-cryptsetup-generator(8) man:[email protected](8)\n"
"SourcePath=/etc/crypttab\n"
"DefaultDependencies=no\n"
"Conflicts=umount.target\n"
"IgnoreOnIsolate=true\n"
"After=%s\n",
netdev ? "remote-fs-pre.target" : "cryptsetup-pre.target");
if (!nofail)
fprintf(f,
"Before=%s\n",
netdev ? "remote-cryptsetup.target" : "cryptsetup.target");
if (password) {
if (STR_IN_SET(password, "/dev/urandom", "/dev/random", "/dev/hw_random"))
fputs_unlocked("After=systemd-random-seed.service\n", f);
else if (!STR_IN_SET(password, "-", "none")) {
_cleanup_free_ char *uu;
uu = fstab_node_to_udev_node(password);
if (!uu)
return log_oom();
if (!path_equal(uu, "/dev/null")) {
if (path_startswith(uu, "/dev/")) {
_cleanup_free_ char *dd = NULL;
r = unit_name_from_path(uu, ".device", &dd);
if (r < 0)
return log_error_errno(r, "Failed to generate unit name: %m");
fprintf(f, "After=%1$s\nRequires=%1$s\n", dd);
} else
fprintf(f, "RequiresMountsFor=%s\n", password_escaped);
}
}
}
if (path_startswith(u, "/dev/")) {
fprintf(f,
"BindsTo=%s\n"
"After=%s\n"
"Before=umount.target\n",
d, d);
if (swap)
fputs_unlocked("Before=dev-mapper-%i.swap\n",
f);
} else
fprintf(f,
"RequiresMountsFor=%s\n",
u_escaped);
r = generator_write_timeouts(arg_dest, device, name, options, &filtered);
if (r < 0)
return r;
filtered_escaped = specifier_escape(filtered);
if (!filtered_escaped)
return log_oom();
fprintf(f,
"\n[Service]\n"
"Type=oneshot\n"
"RemainAfterExit=yes\n"
"TimeoutSec=0\n" /* the binary handles timeouts anyway */
"KeyringMode=shared\n" /* make sure we can share cached keys among instances */
"ExecStart=" SYSTEMD_CRYPTSETUP_PATH " attach '%s' '%s' '%s' '%s'\n"
"ExecStop=" SYSTEMD_CRYPTSETUP_PATH " detach '%s'\n",
name_escaped, u_escaped, strempty(password_escaped), strempty(filtered_escaped),
name_escaped);
if (tmp)
fprintf(f,
"ExecStartPost=/sbin/mke2fs '/dev/mapper/%s'\n",
name_escaped);
if (swap)
fprintf(f,
"ExecStartPost=/sbin/mkswap '/dev/mapper/%s'\n",
name_escaped);
r = fflush_and_check(f);
if (r < 0)
return log_error_errno(r, "Failed to write file %s: %m", p);
if (!noauto) {
r = generator_add_symlink(arg_dest, d, "wants", n);
if (r < 0)
return r;
r = generator_add_symlink(arg_dest,
netdev ? "remote-cryptsetup.target" : "cryptsetup.target",
nofail ? "wants" : "requires", n);
if (r < 0)
return r;
}
dmname = strjoina("dev-mapper-", e, ".device");
r = generator_add_symlink(arg_dest, dmname, "requires", n);
if (r < 0)
return r;
if (!noauto && !nofail) {
r = write_drop_in(arg_dest, dmname, 90, "device-timeout",
"# Automatically generated by systemd-cryptsetup-generator \n\n"
"[Unit]\nJobTimeoutSec=0");
if (r < 0)
return log_error_errno(r, "Failed to write device drop-in: %m");
}
return 0;
}
static int create_dbus_files(
const char *path,
const char *name,
const char *service,
const char *exec,
const char *user,
const char *type) {
_cleanup_free_ char *b = NULL, *s = NULL, *lnk = NULL;
_cleanup_fclose_ FILE *f = NULL;
int r;
assert(path);
assert(name);
assert(service || exec);
if (!service) {
_cleanup_free_ char *a = NULL;
s = strjoin("dbus-", name, ".service", NULL);
if (!s)
return log_oom();
a = strjoin(arg_dest_late, "/", s, NULL);
if (!a)
return log_oom();
f = fopen(a, "wxe");
if (!f)
return log_error_errno(errno, "Failed to create %s: %m", a);
fprintf(f,
"# Automatically generated by systemd-dbus1-generator\n\n"
"[Unit]\n"
"SourcePath=%s\n"
"Description=DBUS1: %s\n"
"Documentation=man:systemd-dbus1-generator(8)\n\n"
"[Service]\n"
"ExecStart=%s\n"
"Type=dbus\n"
"BusName=%s\n",
path,
name,
exec,
name);
if (user)
fprintf(f, "User=%s\n", user);
if (type) {
fprintf(f, "Environment=DBUS_STARTER_BUS_TYPE=%s\n", type);
if (streq(type, "system"))
fprintf(f, "Environment=DBUS_STARTER_ADDRESS=" DEFAULT_SYSTEM_BUS_ADDRESS "\n");
else if (streq(type, "session")) {
char *run;
run = getenv("XDG_RUNTIME_DIR");
if (!run) {
log_error("XDG_RUNTIME_DIR not set.");
return -EINVAL;
}
fprintf(f, "Environment=DBUS_STARTER_ADDRESS="KERNEL_USER_BUS_ADDRESS_FMT ";" UNIX_USER_BUS_ADDRESS_FMT "\n",
getuid(), run);
}
}
r = fflush_and_check(f);
if (r < 0)
return log_error_errno(r, "Failed to write %s: %m", a);
f = safe_fclose(f);
service = s;
}
b = strjoin(arg_dest_late, "/", name, ".busname", NULL);
if (!b)
return log_oom();
f = fopen(b, "wxe");
if (!f)
return log_error_errno(errno, "Failed to create %s: %m", b);
fprintf(f,
"# Automatically generated by systemd-dbus1-generator\n\n"
"[Unit]\n"
"SourcePath=%s\n"
"Description=DBUS1: %s\n"
"Documentation=man:systemd-dbus1-generator(8)\n\n"
"[BusName]\n"
"Name=%s\n"
"Service=%s\n"
"AllowWorld=talk\n",
path,
name,
name,
service);
r = fflush_and_check(f);
if (r < 0)
return log_error_errno(r, "Failed to write %s: %m", b);
lnk = strjoin(arg_dest_late, "/" SPECIAL_BUSNAMES_TARGET ".wants/", name, ".busname", NULL);
if (!lnk)
return log_oom();
mkdir_parents_label(lnk, 0755);
if (symlink(b, lnk))
return log_error_errno(errno, "Failed to create symlink %s: %m", lnk);
return 0;
}
static int add_mount(
const char *id,
const char *what,
const char *where,
const char *fstype,
bool rw,
const char *options,
const char *description,
const char *post) {
_cleanup_free_ char *unit = NULL, *lnk = NULL, *crypto_what = NULL, *p = NULL;
_cleanup_fclose_ FILE *f = NULL;
int r;
assert(id);
assert(what);
assert(where);
assert(description);
log_debug("Adding %s: %s %s", where, what, strna(fstype));
if (streq_ptr(fstype, "crypto_LUKS")) {
r = add_cryptsetup(id, what, rw, &crypto_what);
if (r < 0)
return r;
what = crypto_what;
fstype = NULL;
}
r = unit_name_from_path(where, ".mount", &unit);
if (r < 0)
return log_error_errno(r, "Failed to generate unit name: %m");
p = strjoin(arg_dest, "/", unit, NULL);
if (!p)
return log_oom();
f = fopen(p, "wxe");
if (!f)
return log_error_errno(errno, "Failed to create unit file %s: %m", unit);
fprintf(f,
"# Automatically generated by systemd-gpt-auto-generator\n\n"
"[Unit]\n"
"Description=%s\n"
"Documentation=man:systemd-gpt-auto-generator(8)\n",
description);
if (post)
fprintf(f, "Before=%s\n", post);
r = generator_write_fsck_deps(f, arg_dest, what, where, fstype);
if (r < 0)
return r;
fprintf(f,
"\n"
"[Mount]\n"
"What=%s\n"
"Where=%s\n",
what, where);
if (fstype)
fprintf(f, "Type=%s\n", fstype);
if (options)
fprintf(f, "Options=%s,%s\n", options, rw ? "rw" : "ro");
else
fprintf(f, "Options=%s\n", rw ? "rw" : "ro");
r = fflush_and_check(f);
if (r < 0)
return log_error_errno(r, "Failed to write unit file %s: %m", p);
if (post) {
lnk = strjoin(arg_dest, "/", post, ".requires/", unit, NULL);
if (!lnk)
return log_oom();
mkdir_parents_label(lnk, 0755);
if (symlink(p, lnk) < 0)
return log_error_errno(errno, "Failed to create symlink %s: %m", lnk);
}
return 0;
}
static int add_swap(
const char *what,
struct mntent *me,
bool noauto,
bool nofail) {
_cleanup_free_ char *name = NULL, *unit = NULL, *lnk = NULL;
_cleanup_fclose_ FILE *f = NULL;
int r;
assert(what);
assert(me);
if (access("/proc/swaps", F_OK) < 0) {
log_info("Swap not supported, ignoring fstab swap entry for %s.", what);
return 0;
}
if (detect_container() > 0) {
log_info("Running in a container, ignoring fstab swap entry for %s.", what);
return 0;
}
r = unit_name_from_path(what, ".swap", &name);
if (r < 0)
return log_error_errno(r, "Failed to generate unit name: %m");
unit = strjoin(arg_dest, "/", name);
if (!unit)
return log_oom();
f = fopen(unit, "wxe");
if (!f)
return log_error_errno(errno,
errno == EEXIST ?
"Failed to create swap unit file %s, as it already exists. Duplicate entry in /etc/fstab?" :
"Failed to create unit file %s: %m",
unit);
fprintf(f,
"# Automatically generated by systemd-fstab-generator\n\n"
"[Unit]\n"
"SourcePath=/etc/fstab\n"
"Documentation=man:fstab(5) man:systemd-fstab-generator(8)\n\n"
"[Swap]\n"
"What=%s\n",
what);
if (!isempty(me->mnt_opts) && !streq(me->mnt_opts, "defaults"))
fprintf(f, "Options=%s\n", me->mnt_opts);
r = fflush_and_check(f);
if (r < 0)
return log_error_errno(r, "Failed to write unit file %s: %m", unit);
/* use what as where, to have a nicer error message */
r = generator_write_timeouts(arg_dest, what, what, me->mnt_opts, NULL);
if (r < 0)
return r;
if (!noauto) {
lnk = strjoin(arg_dest, "/" SPECIAL_SWAP_TARGET,
nofail ? ".wants/" : ".requires/", name, NULL);
if (!lnk)
return log_oom();
mkdir_parents_label(lnk, 0755);
if (symlink(unit, lnk) < 0)
return log_error_errno(errno, "Failed to create symlink %s: %m", lnk);
}
return 0;
}
static int add_automount(
const char *id,
const char *what,
const char *where,
const char *fstype,
bool rw,
const char *options,
const char *description,
usec_t timeout) {
_cleanup_free_ char *unit = NULL, *lnk = NULL;
_cleanup_free_ char *opt, *p = NULL;
_cleanup_fclose_ FILE *f = NULL;
int r;
assert(id);
assert(where);
assert(description);
if (options)
opt = strjoin(options, ",noauto", NULL);
else
opt = strdup("noauto");
if (!opt)
return log_oom();
r = add_mount(id,
what,
where,
fstype,
rw,
opt,
description,
NULL);
if (r < 0)
return r;
r = unit_name_from_path(where, ".automount", &unit);
if (r < 0)
return log_error_errno(r, "Failed to generate unit name: %m");
p = strjoin(arg_dest, "/", unit, NULL);
if (!p)
return log_oom();
f = fopen(p, "wxe");
if (!f)
return log_error_errno(errno, "Failed to create unit file %s: %m", unit);
fprintf(f,
"# Automatically generated by systemd-gpt-auto-generator\n\n"
"[Unit]\n"
"Description=%s\n"
"Documentation=man:systemd-gpt-auto-generator(8)\n"
"[Automount]\n"
"Where=%s\n"
"TimeoutIdleSec=%lld\n",
description,
where,
(unsigned long long)timeout / USEC_PER_SEC);
r = fflush_and_check(f);
if (r < 0)
return log_error_errno(r, "Failed to write unit file %s: %m", p);
lnk = strjoin(arg_dest, "/" SPECIAL_LOCAL_FS_TARGET ".wants/", unit, NULL);
if (!lnk)
return log_oom();
mkdir_parents_label(lnk, 0755);
if (symlink(p, lnk) < 0)
return log_error_errno(errno, "Failed to create symlink %s: %m", lnk);
return 0;
}
static int create_disk(
const char *name,
const char *device,
const char *password,
const char *options) {
_cleanup_free_ char *p = NULL, *n = NULL, *d = NULL, *u = NULL, *to = NULL, *e = NULL,
*filtered = NULL;
_cleanup_fclose_ FILE *f = NULL;
bool noauto, nofail, tmp, swap;
char *from;
int r;
assert(name);
assert(device);
noauto = fstab_test_yes_no_option(options, "noauto\0" "auto\0");
nofail = fstab_test_yes_no_option(options, "nofail\0" "fail\0");
tmp = fstab_test_option(options, "tmp\0");
swap = fstab_test_option(options, "swap\0");
if (tmp && swap) {
log_error("Device '%s' cannot be both 'tmp' and 'swap'. Ignoring.", name);
return -EINVAL;
}
e = unit_name_escape(name);
if (!e)
return log_oom();
r = unit_name_build("systemd-cryptsetup", e, ".service", &n);
if (r < 0)
return log_error_errno(r, "Failed to generate unit name: %m");
p = strjoin(arg_dest, "/", n, NULL);
if (!p)
return log_oom();
u = fstab_node_to_udev_node(device);
if (!u)
return log_oom();
r = unit_name_from_path(u, ".device", &d);
if (r < 0)
return log_error_errno(r, "Failed to generate unit name: %m");
f = fopen(p, "wxe");
if (!f)
return log_error_errno(errno, "Failed to create unit file %s: %m", p);
fputs(
"# Automatically generated by systemd-cryptsetup-generator\n\n"
"[Unit]\n"
"Description=Cryptography Setup for %I\n"
"Documentation=man:crypttab(5) man:systemd-cryptsetup-generator(8) man:[email protected](8)\n"
"SourcePath=/etc/crypttab\n"
"DefaultDependencies=no\n"
"Conflicts=umount.target\n"
"BindsTo=dev-mapper-%i.device\n"
"IgnoreOnIsolate=true\n"
"After=cryptsetup-pre.target\n",
f);
if (!nofail)
fprintf(f,
"Before=cryptsetup.target\n");
if (password) {
if (STR_IN_SET(password, "/dev/urandom", "/dev/random", "/dev/hw_random"))
fputs("After=systemd-random-seed.service\n", f);
else if (!streq(password, "-") && !streq(password, "none")) {
_cleanup_free_ char *uu;
uu = fstab_node_to_udev_node(password);
if (!uu)
return log_oom();
if (!path_equal(uu, "/dev/null")) {
if (is_device_path(uu)) {
_cleanup_free_ char *dd = NULL;
r = unit_name_from_path(uu, ".device", &dd);
if (r < 0)
return log_error_errno(r, "Failed to generate unit name: %m");
fprintf(f, "After=%1$s\nRequires=%1$s\n", dd);
} else
fprintf(f, "RequiresMountsFor=%s\n", password);
}
}
}
if (is_device_path(u))
fprintf(f,
"BindsTo=%s\n"
"After=%s\n"
"Before=umount.target\n",
d, d);
else
fprintf(f,
"RequiresMountsFor=%s\n",
u);
r = generator_write_timeouts(arg_dest, device, name, options, &filtered);
if (r < 0)
return r;
fprintf(f,
"\n[Service]\n"
"Type=oneshot\n"
"RemainAfterExit=yes\n"
"TimeoutSec=0\n" /* the binary handles timeouts anyway */
"ExecStart=" SYSTEMD_CRYPTSETUP_PATH " attach '%s' '%s' '%s' '%s'\n"
"ExecStop=" SYSTEMD_CRYPTSETUP_PATH " detach '%s'\n",
name, u, strempty(password), strempty(filtered),
name);
if (tmp)
fprintf(f,
"ExecStartPost=/sbin/mke2fs '/dev/mapper/%s'\n",
name);
if (swap)
fprintf(f,
"ExecStartPost=/sbin/mkswap '/dev/mapper/%s'\n",
name);
r = fflush_and_check(f);
if (r < 0)
return log_error_errno(r, "Failed to write file %s: %m", p);
from = strjoina("../", n);
if (!noauto) {
to = strjoin(arg_dest, "/", d, ".wants/", n, NULL);
if (!to)
return log_oom();
mkdir_parents_label(to, 0755);
if (symlink(from, to) < 0)
return log_error_errno(errno, "Failed to create symlink %s: %m", to);
free(to);
if (!nofail)
to = strjoin(arg_dest, "/cryptsetup.target.requires/", n, NULL);
else
to = strjoin(arg_dest, "/cryptsetup.target.wants/", n, NULL);
if (!to)
return log_oom();
mkdir_parents_label(to, 0755);
if (symlink(from, to) < 0)
return log_error_errno(errno, "Failed to create symlink %s: %m", to);
}
free(to);
to = strjoin(arg_dest, "/dev-mapper-", e, ".device.requires/", n, NULL);
if (!to)
return log_oom();
mkdir_parents_label(to, 0755);
if (symlink(from, to) < 0)
return log_error_errno(errno, "Failed to create symlink %s: %m", to);
if (!noauto && !nofail) {
_cleanup_free_ char *dmname;
dmname = strjoin("dev-mapper-", e, ".device", NULL);
if (!dmname)
return log_oom();
r = write_drop_in(arg_dest, dmname, 90, "device-timeout",
"# Automatically generated by systemd-cryptsetup-generator \n\n"
"[Unit]\nJobTimeoutSec=0");
if (r < 0)
return log_error_errno(r, "Failed to write device drop-in: %m");
}
return 0;
}
static int add_cryptsetup(const char *id, const char *what, bool rw, char **device) {
_cleanup_free_ char *e = NULL, *n = NULL, *p = NULL, *d = NULL, *to = NULL;
_cleanup_fclose_ FILE *f = NULL;
char *from, *ret;
int r;
assert(id);
assert(what);
assert(device);
r = unit_name_from_path(what, ".device", &d);
if (r < 0)
return log_error_errno(r, "Failed to generate unit name: %m");
e = unit_name_escape(id);
if (!e)
return log_oom();
r = unit_name_build("systemd-cryptsetup", e, ".service", &n);
if (r < 0)
return log_error_errno(r, "Failed to generate unit name: %m");
p = strjoin(arg_dest, "/", n, NULL);
if (!p)
return log_oom();
f = fopen(p, "wxe");
if (!f)
return log_error_errno(errno, "Failed to create unit file %s: %m", p);
fprintf(f,
"# Automatically generated by systemd-gpt-auto-generator\n\n"
"[Unit]\n"
"Description=Cryptography Setup for %%I\n"
"Documentation=man:systemd-gpt-auto-generator(8) man:[email protected](8)\n"
"DefaultDependencies=no\n"
"Conflicts=umount.target\n"
"BindsTo=dev-mapper-%%i.device %s\n"
"Before=umount.target cryptsetup.target\n"
"After=%s\n"
"IgnoreOnIsolate=true\n"
"[Service]\n"
"Type=oneshot\n"
"RemainAfterExit=yes\n"
"TimeoutSec=0\n" /* the binary handles timeouts anyway */
"ExecStart=" SYSTEMD_CRYPTSETUP_PATH " attach '%s' '%s' '' '%s'\n"
"ExecStop=" SYSTEMD_CRYPTSETUP_PATH " detach '%s'\n",
d, d,
id, what, rw ? "" : "read-only",
id);
r = fflush_and_check(f);
if (r < 0)
return log_error_errno(r, "Failed to write file %s: %m", p);
from = strjoina("../", n);
to = strjoin(arg_dest, "/", d, ".wants/", n, NULL);
if (!to)
return log_oom();
mkdir_parents_label(to, 0755);
if (symlink(from, to) < 0)
return log_error_errno(errno, "Failed to create symlink %s: %m", to);
free(to);
to = strjoin(arg_dest, "/cryptsetup.target.requires/", n, NULL);
if (!to)
return log_oom();
mkdir_parents_label(to, 0755);
if (symlink(from, to) < 0)
return log_error_errno(errno, "Failed to create symlink %s: %m", to);
free(to);
to = strjoin(arg_dest, "/dev-mapper-", e, ".device.requires/", n, NULL);
if (!to)
return log_oom();
mkdir_parents_label(to, 0755);
if (symlink(from, to) < 0)
return log_error_errno(errno, "Failed to create symlink %s: %m", to);
free(p);
p = strjoin(arg_dest, "/dev-mapper-", e, ".device.d/50-job-timeout-sec-0.conf", NULL);
if (!p)
return log_oom();
mkdir_parents_label(p, 0755);
r = write_string_file(p,
"# Automatically generated by systemd-gpt-auto-generator\n\n"
"[Unit]\n"
"JobTimeoutSec=0\n",
WRITE_STRING_FILE_CREATE); /* the binary handles timeouts anyway */
if (r < 0)
return log_error_errno(r, "Failed to write device drop-in: %m");
ret = strappend("/dev/mapper/", id);
if (!ret)
return log_oom();
*device = ret;
return 0;
}
static opcode_status_ty
spawn(string_list_ty *args, string_ty *input, int *pid_p,
string_ty *host_binding, opcode_context_ty *ocp)
{
size_t j;
int fd;
string_ty *iname;
int pid;
opcode_status_ty status;
static char **argv;
static size_t argvlen;
string_list_ty cmd;
sub_context_ty *scp;
char *shell;
trace(("spawn()\n{\n"));
assert(args);
/*
* build the input file, if required
*/
status = opcode_status_error;
fd = -1;
iname = 0;
if (input)
{
/*
* He has given a string to be used as input to the command,
* so write it out to a file, and then redirect the input.
*/
iname = temporary_filename();
fd = open(iname->str_text, O_RDWR | O_CREAT | O_TRUNC, 0666);
if (fd < 0)
fatal_intl_open(iname->str_text);
if (unlink(iname->str_text))
{
error_intl_unlink(iname->str_text);
goto done;
}
if
(
write(fd, input->str_text, input->str_length) < 0
||
lseek(fd, 0L, SEEK_SET)
)
{
error_intl_write(iname->str_text);
goto done;
}
}
/*
* See if there is a host_binding in effect.
*/
if (host_binding)
{
static string_ty *key;
string_list_ty *slp;
string_ty *s;
string_ty *rcmd;
string_ty *rcmdq;
string_ty *result_fn;
FILE *result_fp;
string_ty *cwd;
string_ty *script_fn;
FILE *script_fp;
/*
* Work out the name of the remote shell command.
*/
if (!key)
key = str_from_c("parallel_rsh");
slp = id_var_search(ocp, key);
if (slp)
string_list_copy_constructor(&cmd, slp);
else
{
static string_ty *rsh;
if (!rsh)
rsh = str_from_c(CONF_REMOTE_SHELL);
string_list_constructor(&cmd);
string_list_append(&cmd, rsh);
}
/*
* Add the name of the host.
*/
string_list_append(&cmd, host_binding);
/*
* The remote end will need to change directory to where
* we are now, since it is *highly* unlikely that we are
* in our home directory.
*/
cwd = os_curdir(); /* do not str_free this */
/*
* We are going to create a small shell script contining
* the command to be executed. This deals with various
* weird and obscure $SHELL settings, and it also deals
* with command lines so long that rsh barfs.
*
* Yes, there is a potential race condition here.
* Between writing the script and executing it, we
* could be tricked into executing something else.
* Especially if there is a symlink lying in wait.
*/
script_fn = dot_temporary_filename();
script_fp = fopen_and_check(script_fn->str_text, "w");
/*
* what shell are we using
*/
shell = getenv("SHELL");
if (!shell || !*shell)
shell = CONF_SHELL;
fprintf(script_fp, "#!%s\n", shell);
/*
* Now write the actual command to the script file.
*/
rcmd = wl2str(args, 0, args->nstrings, (char *)0);
fprintf(script_fp, "%s\n", rcmd->str_text);
str_free(rcmd);
fflush_and_check(script_fp, script_fn->str_text);
fclose_and_check(script_fp, script_fn->str_text);
chmod_and_check(script_fn->str_text, 0755);
/*
* This is the result file. It is where the remote
* command will stash its exit status. We seed it with
* failure in case the rsh fails altogether.
*
* And, yes, there is a race conditon and we could be
* lied to if they are quick.
*/
result_fn = dot_temporary_filename();
result_fp = fopen_and_check(result_fn->str_text, "w");
fprintf(result_fp, "42\n");
fflush_and_check(result_fp, result_fn->str_text);
fclose_and_check(result_fp, result_fn->str_text);
/*
* Because rsh(1) always returns an exit status of zero,
* we have to make other arrangements to obtain the exit
* status.
*
* We actually need to be a more devious, so that we can
* get the exit status back. Write it to a temporary
* file server side, then read and remove it client side.
*
* This is the server side command. It gets quoted
* again to protect it from the client side shell.
*
* We use sh explicitly, because the shell at the other
* end could be csh, tcsh, or something even stranger,
* and we need to guarantee the command will execute
* exactly the way we need.
*/
rcmd =
str_format
(
"sh -c 'cd %s && sh %s %s/%s; echo $? > %s/%s'",
cwd->str_text,
(option_test(OPTION_ERROK) ? "-c" : "-ce"),
cwd->str_text,
script_fn->str_text,
cwd->str_text,
result_fn->str_text
);
rcmdq = str_quote_shell(rcmd);
str_free(rcmd);
string_list_append(&cmd, rcmdq);
str_free(rcmdq);
/*
* This is the rest of the server side command.
*
* On some systems this gives ``Text file busy'' errors,
* as if the script file has yet to be released by
* the kernel. Since we *aren't* executing it when the
* RM command runs, I have no idea how to avoid this
* (other than ignoring it with -f). Maybe this is some
* kind of NFS latency?
*/
s =
str_format
(
"&& exit `cat %s;rm -f %s %s`",
result_fn->str_text,
result_fn->str_text,
script_fn->str_text
);
string_list_append(&cmd, s);
str_free(s);
str_free(result_fn);
str_free(script_fn);
/*
* Because the command has a semicolon and back quotes,
* we need to hand it to a shell (as alluded to above).
* Assemble into a single string.
*/
rcmd = wl2str(&cmd, 0, cmd.nstrings, (char *)0);
string_list_destructor(&cmd);
/*
* Build the final command to be executed.
* It even cleans up after itself.
*/
s = str_from_c("sh");
string_list_append(&cmd, s);
str_free(s);
s = str_from_c("-c");
string_list_append(&cmd, s);
str_free(s);
string_list_append(&cmd, rcmd);
str_free(rcmd);
}
else
{
/*
* build the command
*/
if (os_execute_magic_characters_list(args))
{
string_ty *str;
/*
* what shell are we using
*/
shell = getenv("SHELL");
if (!shell || !*shell)
shell = CONF_SHELL;
string_list_constructor(&cmd);
str = str_from_c(shell);
string_list_append(&cmd, str);
str_free(str);
if (option_test(OPTION_ERROK))
str = str_from_c("-c");
else
str = str_from_c("-ce");
string_list_append(&cmd, str);
str_free(str);
str = wl2str(args, 0, args->nstrings - 1, (char *)0);
string_list_append(&cmd, str);
str_free(str);
}
else
string_list_copy_constructor(&cmd, args);
}
/*
* build the argv array
*/
if (!argv)
{
argvlen = cmd.nstrings + 1;
argv = mem_alloc(argvlen * sizeof(char *));
}
else if (argvlen < cmd.nstrings + 1)
{
argvlen = cmd.nstrings + 1;
argv = mem_change_size(argv, argvlen * sizeof(char *));
}
if (cmd.nstrings == 0)
{
string_list_destructor(&cmd);
status = opcode_status_success;
goto done;
}
for (j = 0; j < cmd.nstrings; ++j)
argv[j] = cmd.string[j]->str_text;
argv[cmd.nstrings] = 0;
/*
* spawn the child process
*/
switch (pid = fork())
{
case -1:
scp = sub_context_new();
sub_errno_set(scp);
error_intl(scp, i18n("fork(): $errno"));
sub_context_delete(scp);
break;
case 0:
/*
* child
*/
if (fd >= 0)
{
if (close(0) && errno != EBADF)
{
string_ty *fn0;
int err;
err = errno;
scp = sub_context_new();
fn0 = subst_intl(scp, "standard input");
/* re-use substitution context */
sub_errno_setx(scp, err);
sub_var_set_string(scp, "File_Name", fn0);
fatal_intl
(
scp,
i18n("close $filename: $errno")
);
/* NOTREACHED */
sub_context_delete(scp);
str_free(fn0);
}
if (dup(fd) < 0)
{
scp = sub_context_new();
sub_errno_set(scp);
fatal_intl(scp, i18n("dup(): $errno"));
/* NOTREACHED */
sub_context_delete(scp);
}
close(fd);
}
if (argv[0][0] == '/')
execv(argv[0], argv);
else
execvp(argv[0], argv);
scp = sub_context_new();
sub_errno_set(scp);
sub_var_set_charstar(scp, "File_Name", argv[0]);
fatal_intl(scp, i18n("exec $filename: $errno"));
/* NOTREACHED */
sub_context_delete(scp);
default:
/*
* parent
*/
if (fd >= 0)
{
close(fd);
fd = -1;
}
string_list_destructor(&cmd);
status = opcode_status_wait;
trace(("pid = %d;\n", pid));
*pid_p = pid;
break;
}
done:
if (fd >= 0)
close(fd);
if (iname)
str_free(iname);
trace(("return %s;\n", opcode_status_name(status)));
trace(("}\n"));
return status;
}