900 lines
26 KiB
C
900 lines
26 KiB
C
/* SPDX-License-Identifier: LGPL-2.1+ */
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#include "alloc-util.h"
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#include "cap-list.h"
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#include "conf-parser.h"
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#include "cpu-set-util.h"
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#include "hostname-util.h"
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#include "nspawn-network.h"
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#include "nspawn-settings.h"
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#include "parse-util.h"
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#include "process-util.h"
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#include "rlimit-util.h"
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#include "socket-util.h"
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#include "string-table.h"
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#include "string-util.h"
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#include "strv.h"
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#include "user-util.h"
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#include "util.h"
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Settings *settings_new(void) {
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Settings *s;
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s = new(Settings, 1);
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if (!s)
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return NULL;
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*s = (Settings) {
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.start_mode = _START_MODE_INVALID,
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.personality = PERSONALITY_INVALID,
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.resolv_conf = _RESOLV_CONF_MODE_INVALID,
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.link_journal = _LINK_JOURNAL_INVALID,
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.timezone = _TIMEZONE_MODE_INVALID,
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.userns_mode = _USER_NAMESPACE_MODE_INVALID,
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.userns_chown = -1,
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.uid_shift = UID_INVALID,
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.uid_range = UID_INVALID,
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.no_new_privileges = -1,
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.read_only = -1,
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.volatile_mode = _VOLATILE_MODE_INVALID,
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.private_network = -1,
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.network_veth = -1,
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.full_capabilities = CAPABILITY_QUINTET_NULL,
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.uid = UID_INVALID,
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.gid = GID_INVALID,
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.console_mode = _CONSOLE_MODE_INVALID,
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.console_width = (unsigned) -1,
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.console_height = (unsigned) -1,
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.clone_ns_flags = (unsigned long) -1,
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.use_cgns = -1,
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};
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return s;
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}
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int settings_load(FILE *f, const char *path, Settings **ret) {
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_cleanup_(settings_freep) Settings *s = NULL;
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int r;
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assert(path);
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assert(ret);
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s = settings_new();
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if (!s)
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return -ENOMEM;
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r = config_parse(NULL, path, f,
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"Exec\0"
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"Network\0"
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"Files\0",
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config_item_perf_lookup, nspawn_gperf_lookup,
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CONFIG_PARSE_WARN,
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s);
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if (r < 0)
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return r;
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/* Make sure that if userns_mode is set, userns_chown is set to something appropriate, and vice versa. Either
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* both fields shall be initialized or neither. */
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if (s->userns_mode == USER_NAMESPACE_PICK)
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s->userns_chown = true;
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else if (s->userns_mode != _USER_NAMESPACE_MODE_INVALID && s->userns_chown < 0)
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s->userns_chown = false;
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if (s->userns_chown >= 0 && s->userns_mode == _USER_NAMESPACE_MODE_INVALID)
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s->userns_mode = USER_NAMESPACE_NO;
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*ret = TAKE_PTR(s);
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return 0;
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}
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static void free_oci_hooks(OciHook *h, size_t n) {
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size_t i;
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assert(h || n == 0);
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for (i = 0; i < n; i++) {
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free(h[i].path);
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strv_free(h[i].args);
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strv_free(h[i].env);
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}
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free(h);
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}
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void device_node_array_free(DeviceNode *node, size_t n) {
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size_t i;
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for (i = 0; i < n; i++)
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free(node[i].path);
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free(node);
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}
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Settings* settings_free(Settings *s) {
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if (!s)
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return NULL;
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strv_free(s->parameters);
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strv_free(s->environment);
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free(s->user);
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free(s->pivot_root_new);
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free(s->pivot_root_old);
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free(s->working_directory);
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strv_free(s->syscall_whitelist);
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strv_free(s->syscall_blacklist);
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rlimit_free_all(s->rlimit);
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free(s->hostname);
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cpu_set_reset(&s->cpu_set);
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strv_free(s->network_interfaces);
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strv_free(s->network_macvlan);
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strv_free(s->network_ipvlan);
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strv_free(s->network_veth_extra);
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free(s->network_bridge);
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free(s->network_zone);
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expose_port_free_all(s->expose_ports);
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custom_mount_free_all(s->custom_mounts, s->n_custom_mounts);
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free(s->bundle);
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free(s->root);
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free_oci_hooks(s->oci_hooks_prestart, s->n_oci_hooks_prestart);
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free_oci_hooks(s->oci_hooks_poststart, s->n_oci_hooks_poststart);
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free_oci_hooks(s->oci_hooks_poststop, s->n_oci_hooks_poststop);
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free(s->slice);
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sd_bus_message_unref(s->properties);
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free(s->supplementary_gids);
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device_node_array_free(s->extra_nodes, s->n_extra_nodes);
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free(s->network_namespace_path);
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strv_free(s->sysctl);
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#if HAVE_SECCOMP
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seccomp_release(s->seccomp);
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#endif
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return mfree(s);
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}
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bool settings_private_network(Settings *s) {
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assert(s);
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return
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s->private_network > 0 ||
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s->network_veth > 0 ||
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s->network_bridge ||
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s->network_zone ||
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s->network_interfaces ||
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s->network_macvlan ||
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s->network_ipvlan ||
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s->network_veth_extra;
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}
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bool settings_network_veth(Settings *s) {
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assert(s);
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return
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s->network_veth > 0 ||
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s->network_bridge ||
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s->network_zone;
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}
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int settings_allocate_properties(Settings *s) {
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_cleanup_(sd_bus_unrefp) sd_bus *bus = NULL;
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int r;
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assert(s);
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if (s->properties)
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return 0;
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r = sd_bus_default_system(&bus);
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if (r < 0)
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return r;
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r = sd_bus_message_new(bus, &s->properties, SD_BUS_MESSAGE_METHOD_CALL);
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if (r < 0)
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return r;
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return 0;
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}
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DEFINE_CONFIG_PARSE_ENUM(config_parse_volatile_mode, volatile_mode, VolatileMode, "Failed to parse volatile mode");
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int config_parse_expose_port(
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const char *unit,
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const char *filename,
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unsigned line,
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const char *section,
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unsigned section_line,
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const char *lvalue,
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int ltype,
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const char *rvalue,
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void *data,
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void *userdata) {
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Settings *s = data;
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int r;
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assert(filename);
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assert(lvalue);
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assert(rvalue);
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r = expose_port_parse(&s->expose_ports, rvalue);
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if (r == -EEXIST) {
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log_syntax(unit, LOG_ERR, filename, line, r, "Duplicate port specification, ignoring: %s", rvalue);
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return 0;
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}
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if (r < 0) {
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log_syntax(unit, LOG_ERR, filename, line, r, "Failed to parse host port %s: %m", rvalue);
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return 0;
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}
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return 0;
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}
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int config_parse_capability(
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const char *unit,
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const char *filename,
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unsigned line,
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const char *section,
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unsigned section_line,
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const char *lvalue,
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int ltype,
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const char *rvalue,
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void *data,
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void *userdata) {
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uint64_t u = 0, *result = data;
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int r;
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assert(filename);
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assert(lvalue);
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assert(rvalue);
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for (;;) {
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_cleanup_free_ char *word = NULL;
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r = extract_first_word(&rvalue, &word, NULL, 0);
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if (r < 0) {
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log_syntax(unit, LOG_ERR, filename, line, r, "Failed to extract capability string, ignoring: %s", rvalue);
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return 0;
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}
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if (r == 0)
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break;
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if (streq(word, "all"))
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u = (uint64_t) -1;
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else {
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r = capability_from_name(word);
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if (r < 0) {
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log_syntax(unit, LOG_ERR, filename, line, r, "Failed to parse capability, ignoring: %s", word);
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continue;
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}
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u |= UINT64_C(1) << r;
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}
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}
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if (u == 0)
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return 0;
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*result |= u;
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return 0;
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}
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int config_parse_id128(
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const char *unit,
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const char *filename,
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unsigned line,
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const char *section,
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unsigned section_line,
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const char *lvalue,
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int ltype,
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const char *rvalue,
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void *data,
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void *userdata) {
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sd_id128_t t, *result = data;
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int r;
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assert(filename);
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assert(lvalue);
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assert(rvalue);
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r = sd_id128_from_string(rvalue, &t);
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if (r < 0) {
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log_syntax(unit, LOG_ERR, filename, line, r, "Failed to parse 128bit ID/UUID, ignoring: %s", rvalue);
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return 0;
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}
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*result = t;
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return 0;
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}
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int config_parse_pivot_root(
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const char *unit,
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const char *filename,
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unsigned line,
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const char *section,
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unsigned section_line,
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const char *lvalue,
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int ltype,
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const char *rvalue,
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void *data,
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void *userdata) {
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Settings *settings = data;
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int r;
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assert(filename);
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assert(lvalue);
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assert(rvalue);
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r = pivot_root_parse(&settings->pivot_root_new, &settings->pivot_root_old, rvalue);
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if (r < 0) {
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log_syntax(unit, LOG_ERR, filename, line, r, "Invalid pivot root mount specification %s: %m", rvalue);
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return 0;
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}
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return 0;
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}
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int config_parse_bind(
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const char *unit,
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const char *filename,
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unsigned line,
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const char *section,
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unsigned section_line,
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const char *lvalue,
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int ltype,
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const char *rvalue,
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void *data,
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void *userdata) {
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Settings *settings = data;
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int r;
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assert(filename);
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assert(lvalue);
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assert(rvalue);
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r = bind_mount_parse(&settings->custom_mounts, &settings->n_custom_mounts, rvalue, ltype);
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if (r < 0) {
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log_syntax(unit, LOG_ERR, filename, line, r, "Invalid bind mount specification %s: %m", rvalue);
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return 0;
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}
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return 0;
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}
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int config_parse_tmpfs(
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const char *unit,
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const char *filename,
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unsigned line,
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const char *section,
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unsigned section_line,
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const char *lvalue,
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int ltype,
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const char *rvalue,
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void *data,
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void *userdata) {
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Settings *settings = data;
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int r;
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assert(filename);
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assert(lvalue);
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assert(rvalue);
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r = tmpfs_mount_parse(&settings->custom_mounts, &settings->n_custom_mounts, rvalue);
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if (r < 0) {
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log_syntax(unit, LOG_ERR, filename, line, r, "Invalid temporary file system specification %s: %m", rvalue);
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return 0;
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}
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return 0;
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}
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int config_parse_inaccessible(
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const char *unit,
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const char *filename,
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unsigned line,
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const char *section,
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unsigned section_line,
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const char *lvalue,
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int ltype,
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const char *rvalue,
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void *data,
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void *userdata) {
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Settings *settings = data;
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int r;
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assert(filename);
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assert(lvalue);
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assert(rvalue);
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r = inaccessible_mount_parse(&settings->custom_mounts, &settings->n_custom_mounts, rvalue);
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if (r < 0) {
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log_syntax(unit, LOG_ERR, filename, line, r, "Invalid inaccessible file system specification %s: %m", rvalue);
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return 0;
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}
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return 0;
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}
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int config_parse_overlay(
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const char *unit,
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const char *filename,
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unsigned line,
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const char *section,
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unsigned section_line,
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const char *lvalue,
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int ltype,
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const char *rvalue,
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void *data,
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void *userdata) {
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Settings *settings = data;
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int r;
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assert(filename);
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assert(lvalue);
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assert(rvalue);
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r = overlay_mount_parse(&settings->custom_mounts, &settings->n_custom_mounts, rvalue, ltype);
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if (r < 0)
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log_syntax(unit, LOG_ERR, filename, line, r, "Invalid overlay file system specification %s, ignoring: %m", rvalue);
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return 0;
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}
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int config_parse_veth_extra(
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const char *unit,
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const char *filename,
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unsigned line,
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const char *section,
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unsigned section_line,
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const char *lvalue,
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int ltype,
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const char *rvalue,
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void *data,
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void *userdata) {
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Settings *settings = data;
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int r;
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assert(filename);
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assert(lvalue);
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assert(rvalue);
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r = veth_extra_parse(&settings->network_veth_extra, rvalue);
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if (r < 0) {
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log_syntax(unit, LOG_ERR, filename, line, r, "Invalid extra virtual Ethernet link specification %s: %m", rvalue);
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return 0;
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}
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return 0;
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}
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int config_parse_network_zone(
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const char *unit,
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const char *filename,
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unsigned line,
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const char *section,
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unsigned section_line,
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const char *lvalue,
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int ltype,
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const char *rvalue,
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void *data,
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void *userdata) {
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Settings *settings = data;
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_cleanup_free_ char *j = NULL;
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assert(filename);
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assert(lvalue);
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assert(rvalue);
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j = strjoin("vz-", rvalue);
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if (!ifname_valid(j)) {
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log_syntax(unit, LOG_ERR, filename, line, 0, "Invalid network zone name, ignoring: %s", rvalue);
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return 0;
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}
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free_and_replace(settings->network_zone, j);
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return 0;
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}
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int config_parse_boot(
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const char *unit,
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const char *filename,
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unsigned line,
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const char *section,
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unsigned section_line,
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const char *lvalue,
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int ltype,
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const char *rvalue,
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void *data,
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void *userdata) {
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Settings *settings = data;
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int r;
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assert(filename);
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assert(lvalue);
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assert(rvalue);
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r = parse_boolean(rvalue);
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if (r < 0) {
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log_syntax(unit, LOG_ERR, filename, line, r, "Failed to parse Boot= parameter %s, ignoring: %m", rvalue);
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return 0;
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}
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if (r > 0) {
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if (settings->start_mode == START_PID2)
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goto conflict;
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settings->start_mode = START_BOOT;
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} else {
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if (settings->start_mode == START_BOOT)
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goto conflict;
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if (settings->start_mode < 0)
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settings->start_mode = START_PID1;
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}
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return 0;
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conflict:
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log_syntax(unit, LOG_ERR, filename, line, r, "Conflicting Boot= or ProcessTwo= setting found. Ignoring.");
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return 0;
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}
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int config_parse_pid2(
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const char *unit,
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const char *filename,
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unsigned line,
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const char *section,
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unsigned section_line,
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const char *lvalue,
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int ltype,
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const char *rvalue,
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void *data,
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void *userdata) {
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Settings *settings = data;
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int r;
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assert(filename);
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assert(lvalue);
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assert(rvalue);
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r = parse_boolean(rvalue);
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if (r < 0) {
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log_syntax(unit, LOG_ERR, filename, line, r, "Failed to parse ProcessTwo= parameter %s, ignoring: %m", rvalue);
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|
return 0;
|
|
}
|
|
|
|
if (r > 0) {
|
|
if (settings->start_mode == START_BOOT)
|
|
goto conflict;
|
|
|
|
settings->start_mode = START_PID2;
|
|
} else {
|
|
if (settings->start_mode == START_PID2)
|
|
goto conflict;
|
|
|
|
if (settings->start_mode < 0)
|
|
settings->start_mode = START_PID1;
|
|
}
|
|
|
|
return 0;
|
|
|
|
conflict:
|
|
log_syntax(unit, LOG_ERR, filename, line, r, "Conflicting Boot= or ProcessTwo= setting found. Ignoring.");
|
|
return 0;
|
|
}
|
|
|
|
int config_parse_private_users(
|
|
const char *unit,
|
|
const char *filename,
|
|
unsigned line,
|
|
const char *section,
|
|
unsigned section_line,
|
|
const char *lvalue,
|
|
int ltype,
|
|
const char *rvalue,
|
|
void *data,
|
|
void *userdata) {
|
|
|
|
Settings *settings = data;
|
|
int r;
|
|
|
|
assert(filename);
|
|
assert(lvalue);
|
|
assert(rvalue);
|
|
|
|
r = parse_boolean(rvalue);
|
|
if (r == 0) {
|
|
/* no: User namespacing off */
|
|
settings->userns_mode = USER_NAMESPACE_NO;
|
|
settings->uid_shift = UID_INVALID;
|
|
settings->uid_range = UINT32_C(0x10000);
|
|
} else if (r > 0) {
|
|
/* yes: User namespacing on, UID range is read from root dir */
|
|
settings->userns_mode = USER_NAMESPACE_FIXED;
|
|
settings->uid_shift = UID_INVALID;
|
|
settings->uid_range = UINT32_C(0x10000);
|
|
} else if (streq(rvalue, "pick")) {
|
|
/* pick: User namespacing on, UID range is picked randomly */
|
|
settings->userns_mode = USER_NAMESPACE_PICK;
|
|
settings->uid_shift = UID_INVALID;
|
|
settings->uid_range = UINT32_C(0x10000);
|
|
} else {
|
|
const char *range, *shift;
|
|
uid_t sh, rn;
|
|
|
|
/* anything else: User namespacing on, UID range is explicitly configured */
|
|
|
|
range = strchr(rvalue, ':');
|
|
if (range) {
|
|
shift = strndupa(rvalue, range - rvalue);
|
|
range++;
|
|
|
|
r = safe_atou32(range, &rn);
|
|
if (r < 0 || rn <= 0) {
|
|
log_syntax(unit, LOG_ERR, filename, line, r, "UID/GID range invalid, ignoring: %s", range);
|
|
return 0;
|
|
}
|
|
} else {
|
|
shift = rvalue;
|
|
rn = UINT32_C(0x10000);
|
|
}
|
|
|
|
r = parse_uid(shift, &sh);
|
|
if (r < 0) {
|
|
log_syntax(unit, LOG_ERR, filename, line, r, "UID/GID shift invalid, ignoring: %s", range);
|
|
return 0;
|
|
}
|
|
|
|
settings->userns_mode = USER_NAMESPACE_FIXED;
|
|
settings->uid_shift = sh;
|
|
settings->uid_range = rn;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
int config_parse_syscall_filter(
|
|
const char *unit,
|
|
const char *filename,
|
|
unsigned line,
|
|
const char *section,
|
|
unsigned section_line,
|
|
const char *lvalue,
|
|
int ltype,
|
|
const char *rvalue,
|
|
void *data,
|
|
void *userdata) {
|
|
|
|
Settings *settings = data;
|
|
bool negative;
|
|
const char *items;
|
|
int r;
|
|
|
|
assert(filename);
|
|
assert(lvalue);
|
|
assert(rvalue);
|
|
|
|
negative = rvalue[0] == '~';
|
|
items = negative ? rvalue + 1 : rvalue;
|
|
|
|
for (;;) {
|
|
_cleanup_free_ char *word = NULL;
|
|
|
|
r = extract_first_word(&items, &word, NULL, 0);
|
|
if (r == 0)
|
|
break;
|
|
if (r == -ENOMEM)
|
|
return log_oom();
|
|
if (r < 0) {
|
|
log_syntax(unit, LOG_ERR, filename, line, r, "Failed to parse SystemCallFilter= parameter %s, ignoring: %m", rvalue);
|
|
return 0;
|
|
}
|
|
|
|
if (negative)
|
|
r = strv_extend(&settings->syscall_blacklist, word);
|
|
else
|
|
r = strv_extend(&settings->syscall_whitelist, word);
|
|
if (r < 0)
|
|
return log_oom();
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
int config_parse_hostname(
|
|
const char *unit,
|
|
const char *filename,
|
|
unsigned line,
|
|
const char *section,
|
|
unsigned section_line,
|
|
const char *lvalue,
|
|
int ltype,
|
|
const char *rvalue,
|
|
void *data,
|
|
void *userdata) {
|
|
|
|
char **s = data;
|
|
|
|
assert(rvalue);
|
|
assert(s);
|
|
|
|
if (!hostname_is_valid(rvalue, false)) {
|
|
log_syntax(unit, LOG_ERR, filename, line, 0, "Invalid hostname, ignoring: %s", rvalue);
|
|
return 0;
|
|
}
|
|
|
|
if (free_and_strdup(s, empty_to_null(rvalue)) < 0)
|
|
return log_oom();
|
|
|
|
return 0;
|
|
}
|
|
|
|
int config_parse_oom_score_adjust(
|
|
const char *unit,
|
|
const char *filename,
|
|
unsigned line,
|
|
const char *section,
|
|
unsigned section_line,
|
|
const char *lvalue,
|
|
int ltype,
|
|
const char *rvalue,
|
|
void *data,
|
|
void *userdata) {
|
|
|
|
Settings *settings = data;
|
|
int oa, r;
|
|
|
|
assert(rvalue);
|
|
assert(settings);
|
|
|
|
if (isempty(rvalue)) {
|
|
settings->oom_score_adjust_set = false;
|
|
return 0;
|
|
}
|
|
|
|
r = parse_oom_score_adjust(rvalue, &oa);
|
|
if (r == -ERANGE) {
|
|
log_syntax(unit, LOG_ERR, filename, line, r, "OOM score adjust value out of range, ignoring: %s", rvalue);
|
|
return 0;
|
|
}
|
|
if (r < 0) {
|
|
log_syntax(unit, LOG_ERR, filename, line, r, "Failed to parse the OOM score adjust value, ignoring: %s", rvalue);
|
|
return 0;
|
|
}
|
|
|
|
settings->oom_score_adjust = oa;
|
|
settings->oom_score_adjust_set = true;
|
|
|
|
return 0;
|
|
}
|
|
|
|
int config_parse_cpu_affinity(
|
|
const char *unit,
|
|
const char *filename,
|
|
unsigned line,
|
|
const char *section,
|
|
unsigned section_line,
|
|
const char *lvalue,
|
|
int ltype,
|
|
const char *rvalue,
|
|
void *data,
|
|
void *userdata) {
|
|
|
|
Settings *settings = data;
|
|
|
|
assert(rvalue);
|
|
assert(settings);
|
|
|
|
return parse_cpu_set_extend(rvalue, &settings->cpu_set, true, unit, filename, line, lvalue);
|
|
}
|
|
|
|
DEFINE_CONFIG_PARSE_ENUM(config_parse_resolv_conf, resolv_conf_mode, ResolvConfMode, "Failed to parse resolv.conf mode");
|
|
|
|
static const char *const resolv_conf_mode_table[_RESOLV_CONF_MODE_MAX] = {
|
|
[RESOLV_CONF_OFF] = "off",
|
|
[RESOLV_CONF_COPY_HOST] = "copy-host",
|
|
[RESOLV_CONF_COPY_STATIC] = "copy-static",
|
|
[RESOLV_CONF_BIND_HOST] = "bind-host",
|
|
[RESOLV_CONF_BIND_STATIC] = "bind-static",
|
|
[RESOLV_CONF_DELETE] = "delete",
|
|
[RESOLV_CONF_AUTO] = "auto",
|
|
};
|
|
|
|
DEFINE_STRING_TABLE_LOOKUP_WITH_BOOLEAN(resolv_conf_mode, ResolvConfMode, RESOLV_CONF_AUTO);
|
|
|
|
int parse_link_journal(const char *s, LinkJournal *ret_mode, bool *ret_try) {
|
|
assert(s);
|
|
assert(ret_mode);
|
|
assert(ret_try);
|
|
|
|
if (streq(s, "auto")) {
|
|
*ret_mode = LINK_AUTO;
|
|
*ret_try = false;
|
|
} else if (streq(s, "no")) {
|
|
*ret_mode = LINK_NO;
|
|
*ret_try = false;
|
|
} else if (streq(s, "guest")) {
|
|
*ret_mode = LINK_GUEST;
|
|
*ret_try = false;
|
|
} else if (streq(s, "host")) {
|
|
*ret_mode = LINK_HOST;
|
|
*ret_try = false;
|
|
} else if (streq(s, "try-guest")) {
|
|
*ret_mode = LINK_GUEST;
|
|
*ret_try = true;
|
|
} else if (streq(s, "try-host")) {
|
|
*ret_mode = LINK_HOST;
|
|
*ret_try = true;
|
|
} else
|
|
return -EINVAL;
|
|
|
|
return 0;
|
|
}
|
|
|
|
int config_parse_link_journal(
|
|
const char *unit,
|
|
const char *filename,
|
|
unsigned line,
|
|
const char *section,
|
|
unsigned section_line,
|
|
const char *lvalue,
|
|
int ltype,
|
|
const char *rvalue,
|
|
void *data,
|
|
void *userdata) {
|
|
|
|
Settings *settings = data;
|
|
int r;
|
|
|
|
assert(rvalue);
|
|
assert(settings);
|
|
|
|
r = parse_link_journal(rvalue, &settings->link_journal, &settings->link_journal_try);
|
|
if (r < 0) {
|
|
log_syntax(unit, LOG_ERR, filename, line, r, "Failed to parse link journal mode, ignoring: %s", rvalue);
|
|
return 0;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
DEFINE_CONFIG_PARSE_ENUM(config_parse_timezone, timezone_mode, TimezoneMode, "Failed to parse timezone mode");
|
|
|
|
static const char *const timezone_mode_table[_TIMEZONE_MODE_MAX] = {
|
|
[TIMEZONE_OFF] = "off",
|
|
[TIMEZONE_COPY] = "copy",
|
|
[TIMEZONE_BIND] = "bind",
|
|
[TIMEZONE_SYMLINK] = "symlink",
|
|
[TIMEZONE_DELETE] = "delete",
|
|
[TIMEZONE_AUTO] = "auto",
|
|
};
|
|
|
|
DEFINE_STRING_TABLE_LOOKUP_WITH_BOOLEAN(timezone_mode, TimezoneMode, TIMEZONE_AUTO);
|