src/shared/conf-parser.c - systemd-stable - Rivoreo Source Code Repositories

 /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/

 /***
   This file is part of systemd.

   Copyright 2010 Lennart Poettering

   systemd is free software; you can redistribute it and/or modify it
   under the terms of the GNU Lesser General Public License as published by
   the Free Software Foundation; either version 2.1 of the License, or
   (at your option) any later version.

   systemd is distributed in the hope that it will be useful, but
   WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
   Lesser General Public License for more details.

   You should have received a copy of the GNU Lesser General Public License
   along with systemd; If not, see <http://www.gnu.org/licenses/>.
 ***/

 #include <string.h>
 #include <stdio.h>
 #include <errno.h>
 #include <assert.h>
 #include <stdlib.h>

 #include "conf-parser.h"
 #include "util.h"
 #include "macro.h"
 #include "strv.h"
 #include "log.h"
 #include "utf8.h"
 #include "path-util.h"
 #include "set.h"
 #include "exit-status.h"

 int config_item_table_lookup(
                 void *table,
                 const char *section,
                 const char *lvalue,
                 ConfigParserCallback *func,
                 int *ltype,
                 void **data,
                 void *userdata) {

         ConfigTableItem *t;

         assert(table);
         assert(lvalue);
         assert(func);
         assert(ltype);
         assert(data);

         for (t = table; t->lvalue; t++) {

                 if (!streq(lvalue, t->lvalue))
                         continue;

                 if (!streq_ptr(section, t->section))
                         continue;

                 *func = t->parse;
                 *ltype = t->ltype;
                 *data = t->data;
                 return 1;
         }

         return 0;
 }

 int config_item_perf_lookup(
                 void *table,
                 const char *section,
                 const char *lvalue,
                 ConfigParserCallback *func,
                 int *ltype,
                 void **data,
                 void *userdata) {

         ConfigPerfItemLookup lookup = (ConfigPerfItemLookup) table;
         const ConfigPerfItem *p;

         assert(table);
         assert(lvalue);
         assert(func);
         assert(ltype);
         assert(data);

         if (!section)
                 p = lookup(lvalue, strlen(lvalue));
         else {
                 char *key;

                 key = strjoin(section, ".", lvalue, NULL);
                 if (!key)
                         return -ENOMEM;

                 p = lookup(key, strlen(key));
                 free(key);
         }

         if (!p)
                 return 0;

         *func = p->parse;
         *ltype = p->ltype;
         *data = (uint8_t*) userdata + p->offset;
         return 1;
 }

 /* Run the user supplied parser for an assignment */
 static int next_assignment(
                 const char *filename,
                 unsigned line,
                 ConfigItemLookup lookup,
                 void *table,
                 const char *section,
                 const char *lvalue,
                 const char *rvalue,
                 bool relaxed,
                 void *userdata) {

         ConfigParserCallback func = NULL;
         int ltype = 0;
         void *data = NULL;
         int r;

         assert(filename);
         assert(line > 0);
         assert(lookup);
         assert(lvalue);
         assert(rvalue);

         r = lookup(table, section, lvalue, &func, &ltype, &data, userdata);
         if (r < 0)
                 return r;

         if (r > 0) {
                 if (func)
                         return func(filename, line, section, lvalue, ltype, rvalue, data, userdata);

                 return 0;
         }

         /* Warn about unknown non-extension fields. */
         if (!relaxed && !startswith(lvalue, "X-"))
                 log_info("[%s:%u] Unknown lvalue '%s' in section '%s'. Ignoring.", filename, line, lvalue, section);

         return 0;
 }

 /* Parse a variable assignment line */
 static int parse_line(
                 const char *filename,
                 unsigned line,
                 const char *sections,
                 ConfigItemLookup lookup,
                 void *table,
                 bool relaxed,
                 char **section,
                 char *l,
                 void *userdata) {

         char *e;

         assert(filename);
         assert(line > 0);
         assert(lookup);
         assert(l);

         l = strstrip(l);

         if (!*l)
                 return 0;

         if (strchr(COMMENTS, *l))
                 return 0;

         if (startswith(l, ".include ")) {
                 char *fn;
                 int r;

                 fn = file_in_same_dir(filename, strstrip(l+9));
                 if (!fn)
                         return -ENOMEM;

                 r = config_parse(fn, NULL, sections, lookup, table, relaxed, userdata);
                 free(fn);

                 return r;
         }

         if (*l == '[') {
                 size_t k;
                 char *n;

                 k = strlen(l);
                 assert(k > 0);

                 if (l[k-1] != ']') {
                         log_error("[%s:%u] Invalid section header.", filename, line);
                         return -EBADMSG;
                 }

                 n = strndup(l+1, k-2);
                 if (!n)
                         return -ENOMEM;

                 if (sections && !nulstr_contains(sections, n)) {

                         if (!relaxed)
                                 log_info("[%s:%u] Unknown section '%s'. Ignoring.", filename, line, n);

                         free(n);
                         *section = NULL;
                 } else {
                         free(*section);
                         *section = n;
                 }

                 return 0;
         }

         if (sections && !*section) {

                 if (!relaxed)
                         log_info("[%s:%u] Assignment outside of section. Ignoring.", filename, line);

                 return 0;
         }

         e = strchr(l, '=');
         if (!e) {
                 log_error("[%s:%u] Missing '='.", filename, line);
                 return -EBADMSG;
         }

         *e = 0;
         e++;

         return next_assignment(
                         filename,
                         line,
                         lookup,
                         table,
                         *section,
                         strstrip(l),
                         strstrip(e),
                         relaxed,
                         userdata);
 }

 /* Go through the file and parse each line */
 int config_parse(
                 const char *filename,
                 FILE *f,
                 const char *sections,
                 ConfigItemLookup lookup,
                 void *table,
                 bool relaxed,
                 void *userdata) {

         unsigned line = 0;
         char *section = NULL;
         int r;
         bool ours = false;
         char *continuation = NULL;

         assert(filename);
         assert(lookup);

         if (!f) {
                 f = fopen(filename, "re");
                 if (!f) {
                         r = -errno;
                         log_error("Failed to open configuration file '%s': %s", filename, strerror(-r));
                         goto finish;
                 }

                 ours = true;
         }

         while (!feof(f)) {
                 char l[LINE_MAX], *p, *c = NULL, *e;
                 bool escaped = false;

                 if (!fgets(l, sizeof(l), f)) {
                         if (feof(f))
                                 break;

                         r = -errno;
                         log_error("Failed to read configuration file '%s': %s", filename, strerror(-r));
                         goto finish;
                 }

                 truncate_nl(l);

                 if (continuation) {
                         c = strappend(continuation, l);
                         if (!c) {
                                 r = -ENOMEM;
                                 goto finish;
                         }

                         free(continuation);
                         continuation = NULL;
                         p = c;
                 } else
                         p = l;

                 for (e = p; *e; e++) {
                         if (escaped)
                                 escaped = false;
                         else if (*e == '\\')
                                 escaped = true;
                 }

                 if (escaped) {
                         *(e-1) = ' ';

                         if (c)
                                 continuation = c;
                         else {
                                 continuation = strdup(l);
                                 if (!continuation) {
                                         r = -ENOMEM;
                                         goto finish;
                                 }
                         }

                         continue;
                 }

                 r = parse_line(filename,
                                 ++line,
                                 sections,
                                 lookup,
                                 table,
                                 relaxed,
                                 &section,
                                 p,
                                 userdata);
                 free(c);

                 if (r < 0)
                         goto finish;
         }

         r = 0;

 finish:
         free(section);
         free(continuation);

         if (f && ours)
                 fclose(f);

         return r;
 }

 int config_parse_int(
                 const char *filename,
                 unsigned line,
                 const char *section,
                 const char *lvalue,
                 int ltype,
                 const char *rvalue,
                 void *data,
                 void *userdata) {

         int *i = data;
         int r;

         assert(filename);
         assert(lvalue);
         assert(rvalue);
         assert(data);

         r = safe_atoi(rvalue, i);
         if (r < 0) {
                 log_error("[%s:%u] Failed to parse numeric value, ingoring: %s", filename, line, rvalue);
                 return 0;
         }

         return 0;
 }

 int config_parse_long(
                 const char *filename,
                 unsigned line,
                 const char *section,
                 const char *lvalue,
                 int ltype,
                 const char *rvalue,
                 void *data,
                 void *userdata) {

         long *i = data;
         int r;

         assert(filename);
         assert(lvalue);
         assert(rvalue);
         assert(data);

         r = safe_atoli(rvalue, i);
         if (r < 0) {
                 log_error("[%s:%u] Failed to parse numeric value, ignoring: %s", filename, line, rvalue);
                 return 0;
         }

         return 0;
 }

 int config_parse_uint64(
                 const char *filename,
                 unsigned line,
                 const char *section,
                 const char *lvalue,
                 int ltype,
                 const char *rvalue,
                 void *data,
                 void *userdata) {

         uint64_t *u = data;
         int r;

         assert(filename);
         assert(lvalue);
         assert(rvalue);
         assert(data);

         r = safe_atou64(rvalue, u);
         if (r < 0) {
                 log_error("[%s:%u] Failed to parse numeric value, ignoring: %s", filename, line, rvalue);
                 return 0;
         }

         return 0;
 }

 int config_parse_unsigned(
                 const char *filename,
                 unsigned line,
                 const char *section,
                 const char *lvalue,
                 int ltype,
                 const char *rvalue,
                 void *data,
                 void *userdata) {

         unsigned *u = data;
         int r;

         assert(filename);
         assert(lvalue);
         assert(rvalue);
         assert(data);

         r = safe_atou(rvalue, u);
         if (r < 0) {
                 log_error("[%s:%u] Failed to parse numeric value: %s", filename, line, rvalue);
                 return r;
         }

         return 0;
 }

 int config_parse_double(
                 const char *filename,
                 unsigned line,
                 const char *section,
                 const char *lvalue,
                 int ltype,
                 const char *rvalue,
                 void *data,
                 void *userdata) {

         double *d = data;
         int r;

         assert(filename);
         assert(lvalue);
         assert(rvalue);
         assert(data);

         r = safe_atod(rvalue, d);
         if (r < 0) {
                 log_error("[%s:%u] Failed to parse numeric value: %s", filename, line, rvalue);
                 return r;
         }

         return 0;
 }

 int config_parse_bytes_size(
                 const char *filename,
                 unsigned line,
                 const char *section,
                 const char *lvalue,
                 int ltype,
                 const char *rvalue,
                 void *data,
                 void *userdata) {

         size_t *sz = data;
         off_t o;

         assert(filename);
         assert(lvalue);
         assert(rvalue);
         assert(data);

         if (parse_bytes(rvalue, &o) < 0 || (off_t) (size_t) o != o) {
                 log_error("[%s:%u] Failed to parse byte value, ignoring: %s", filename, line, rvalue);
                 return 0;
         }

         *sz = (size_t) o;
         return 0;
 }


 int config_parse_bytes_off(
                 const char *filename,
                 unsigned line,
                 const char *section,
                 const char *lvalue,
                 int ltype,
                 const char *rvalue,
                 void *data,
                 void *userdata) {

         off_t *bytes = data;

         assert(filename);
         assert(lvalue);
         assert(rvalue);
         assert(data);

         assert_cc(sizeof(off_t) == sizeof(uint64_t));

         if (parse_bytes(rvalue, bytes) < 0) {
                 log_error("[%s:%u] Failed to parse bytes value, ignoring: %s", filename, line, rvalue);
                 return 0;
         }

         return 0;
 }

 int config_parse_bool(
                 const char *filename,
                 unsigned line,
                 const char *section,
                 const char *lvalue,
                 int ltype,
                 const char *rvalue,
                 void *data,
                 void *userdata) {

         int k;
         bool *b = data;

         assert(filename);
         assert(lvalue);
         assert(rvalue);
         assert(data);

         if ((k = parse_boolean(rvalue)) < 0) {
                 log_error("[%s:%u] Failed to parse boolean value, ignoring: %s", filename, line, rvalue);
                 return 0;
         }

         *b = !!k;
         return 0;
 }

 int config_parse_tristate(
                 const char *filename,
                 unsigned line,
                 const char *section,
                 const char *lvalue,
                 int ltype,
                 const char *rvalue,
                 void *data,
                 void *userdata) {

         int k;
         int *b = data;

         assert(filename);
         assert(lvalue);
         assert(rvalue);
         assert(data);

         /* Tristates are like booleans, but can also take the 'default' value, i.e. "-1" */

         k = parse_boolean(rvalue);
         if (k < 0) {
                 log_error("[%s:%u] Failed to parse boolean value, ignoring: %s", filename, line, rvalue);
                 return 0;
         }

         *b = !!k;
         return 0;
 }

 int config_parse_string(
                 const char *filename,
                 unsigned line,
                 const char *section,
                 const char *lvalue,
                 int ltype,
                 const char *rvalue,
                 void *data,
                 void *userdata) {

         char **s = data;
         char *n;

         assert(filename);
         assert(lvalue);
         assert(rvalue);
         assert(data);

         n = strdup(rvalue);
         if (!n)
                 return log_oom();

         if (!utf8_is_valid(n)) {
                 log_error("[%s:%u] String is not UTF-8 clean, ignoring assignment: %s", filename, line, rvalue);
                 free(n);
                 return 0;
         }

         free(*s);
         if (*n)
                 *s = n;
         else {
                 free(n);
                 *s = NULL;
         }

         return 0;
 }

 int config_parse_path(
                 const char *filename,
                 unsigned line,
                 const char *section,
                 const char *lvalue,
                 int ltype,
                 const char *rvalue,
                 void *data,
                 void *userdata) {

         char **s = data;
         char *n;

         assert(filename);
         assert(lvalue);
         assert(rvalue);
         assert(data);

         if (!utf8_is_valid(rvalue)) {
                 log_error("[%s:%u] Path is not UTF-8 clean, ignoring assignment: %s", filename, line, rvalue);
                 return 0;
         }

         if (!path_is_absolute(rvalue)) {
                 log_error("[%s:%u] Not an absolute path, ignoring: %s", filename, line, rvalue);
                 return 0;
         }

         n = strdup(rvalue);
         if (!n)
                 return log_oom();

         path_kill_slashes(n);

         free(*s);
         *s = n;

         return 0;
 }

 int config_parse_strv(
                 const char *filename,
                 unsigned line,
                 const char *section,
                 const char *lvalue,
                 int ltype,
                 const char *rvalue,
                 void *data,
                 void *userdata) {

         char *** sv = data, *w, *state;
         size_t l;
         int r;

         assert(filename);
         assert(lvalue);
         assert(rvalue);
         assert(data);

         if (isempty(rvalue)) {
                 char **empty;

                 /* Empty assignment resets the list. As a special rule
                  * we actually fill in a real empty array here rather
                  * than NULL, since some code wants to know if
                  * something was set at all... */
                 empty = strv_new(NULL, NULL);
                 if (!empty)
                         return log_oom();

                 strv_free(*sv);
                 *sv = empty;
                 return 0;
         }

         FOREACH_WORD_QUOTED(w, l, rvalue, state) {
                 _cleanup_free_ char *n;

                 n = cunescape_length(w, l);
                 if (!n)
                         return log_oom();

                 if (!utf8_is_valid(n)) {
                         log_error("[%s:%u] String is not UTF-8 clean, ignoring: %s", filename, line, rvalue);
                         continue;
                 }

                 r = strv_extend(sv, n);
                 if (r < 0)
                         return log_oom();
         }

         return 0;
 }

 int config_parse_path_strv(
                 const char *filename,
                 unsigned line,
                 const char *section,
                 const char *lvalue,
                 int ltype,
                 const char *rvalue,
                 void *data,
                 void *userdata) {

         char*** sv = data, *w, *state;
         size_t l;
         int r;

         assert(filename);
         assert(lvalue);
         assert(rvalue);
         assert(data);

         if (isempty(rvalue)) {
                 /* Empty assignment resets the list */
                 strv_free(*sv);
                 *sv = NULL;
                 return 0;
         }

         FOREACH_WORD_QUOTED(w, l, rvalue, state) {
                 _cleanup_free_ char *n;

                 n = strndup(w, l);
                 if (!n)
                         return log_oom();

                 if (!utf8_is_valid(n)) {
                         log_error("[%s:%u] Path is not UTF-8 clean, ignoring assignment: %s", filename, line, rvalue);
                         continue;
                 }

                 if (!path_is_absolute(n)) {
                         log_error("[%s:%u] Not an absolute path, ignoring: %s", filename, line, rvalue);
                         continue;
                 }

                 path_kill_slashes(n);
                 r = strv_extend(sv, n);
                 if (r < 0)
                         return log_oom();
         }

         return 0;
 }

 int config_parse_usec(
                 const char *filename,
                 unsigned line,
                 const char *section,
                 const char *lvalue,
                 int ltype,
                 const char *rvalue,
                 void *data,
                 void *userdata) {

         usec_t *usec = data;

         assert(filename);
         assert(lvalue);
         assert(rvalue);
         assert(data);

         if (parse_usec(rvalue, usec) < 0) {
                 log_error("[%s:%u] Failed to parse time value, ignoring: %s", filename, line, rvalue);
                 return 0;
         }

         return 0;
 }

 int config_parse_nsec(
                 const char *filename,
                 unsigned line,
                 const char *section,
                 const char *lvalue,
                 int ltype,
                 const char *rvalue,
                 void *data,
                 void *userdata) {

         nsec_t *nsec = data;

         assert(filename);
         assert(lvalue);
         assert(rvalue);
         assert(data);

         if (parse_nsec(rvalue, nsec) < 0) {
                 log_error("[%s:%u] Failed to parse time value, ignoring: %s", filename, line, rvalue);
                 return 0;
         }

         return 0;
 }

 int config_parse_mode(
                 const char *filename,
                 unsigned line,
                 const char *section,
                 const char *lvalue,
                 int ltype,
                 const char *rvalue,
                 void *data,
                 void *userdata) {

         mode_t *m = data;
         long l;
         char *x = NULL;

         assert(filename);
         assert(lvalue);
         assert(rvalue);
         assert(data);

         errno = 0;
         l = strtol(rvalue, &x, 8);
         if (!x || x == rvalue || *x || errno) {
                 log_error("[%s:%u] Failed to parse mode value, ignoring: %s", filename, line, rvalue);
                 return 0;
         }

         if (l < 0000 || l > 07777) {
                 log_error("[%s:%u] mode value out of range, ignoring: %s", filename, line, rvalue);
                 return 0;
         }

         *m = (mode_t) l;
         return 0;
 }

 int config_parse_facility(
                 const char *filename,
                 unsigned line,
                 const char *section,
                 const char *lvalue,
                 int ltype,
                 const char *rvalue,
                 void *data,
                 void *userdata) {


         int *o = data, x;

         assert(filename);
         assert(lvalue);
         assert(rvalue);
         assert(data);

         x = log_facility_unshifted_from_string(rvalue);
         if (x < 0) {
                 log_error("[%s:%u] Failed to parse log facility, ignoring: %s", filename, line, rvalue);
                 return 0;
         }

         *o = (x << 3) | LOG_PRI(*o);

         return 0;
 }

 int config_parse_level(
                 const char *filename,
                 unsigned line,
                 const char *section,
                 const char *lvalue,
                 int ltype,
                 const char *rvalue,
                 void *data,
                 void *userdata) {


         int *o = data, x;

         assert(filename);
         assert(lvalue);
         assert(rvalue);
         assert(data);

         x = log_level_from_string(rvalue);
         if (x < 0) {
                 log_error("[%s:%u] Failed to parse log level, ignoring: %s", filename, line, rvalue);
                 return 0;
         }

         *o = (*o & LOG_FACMASK) | x;
         return 0;
 }

 int config_parse_set_status(
                 const char *filename,
                 unsigned line,
                 const char *section,
                 const char *lvalue,
                 int ltype,
                 const char *rvalue,
                 void *data,
                 void *userdata) {

         char *w;
         size_t l;
         char *state;
         int r;
         ExitStatusSet *status_set = data;

         assert(filename);
         assert(lvalue);
         assert(rvalue);
         assert(data);

         if (isempty(rvalue)) {
                 /* Empty assignment resets the list */

                 set_free(status_set->signal);
                 set_free(status_set->code);

                 status_set->signal = status_set->code = NULL;
                 return 0;
         }

         FOREACH_WORD(w, l, rvalue, state) {
                 int val;
                 char *temp;

                 temp = strndup(w, l);
                 if (!temp)
                         return log_oom();

                 r = safe_atoi(temp, &val);
                 if (r < 0) {
                         val = signal_from_string_try_harder(temp);
                         free(temp);

                         if (val > 0) {
                                 r = set_ensure_allocated(&status_set->signal, trivial_hash_func, trivial_compare_func);
                                 if (r < 0)
                                         return log_oom();

                                 r = set_put(status_set->signal, INT_TO_PTR(val));
                                 if (r < 0) {
                                         log_error("[%s:%u] Unable to store: %s", filename, line, w);
                                         return r;
                                 }
                         } else {
                                 log_error("[%s:%u] Failed to parse value, ignoring: %s", filename, line, w);
                                 return 0;
                         }
                 } else {
                         free(temp);

                         if (val < 0 || val > 255)
                                 log_warning("[%s:%u] Value %d is outside range 0-255, ignoring", filename, line, val);
                         else {
                                 r = set_ensure_allocated(&status_set->code, trivial_hash_func, trivial_compare_func);
                                 if (r < 0)
                                         return log_oom();

                                 r = set_put(status_set->code, INT_TO_PTR(val));
                                 if (r < 0) {
                                         log_error("[%s:%u] Unable to store: %s", filename, line, w);
                                         return r;
                                 }
                         }
                 }
         }

         return 0;
 }
	/-- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil --/

	/***
	This file is part of systemd.

	Copyright 2010 Lennart Poettering

	systemd is free software; you can redistribute it and/or modify it
	under the terms of the GNU Lesser General Public License as published by
	the Free Software Foundation; either version 2.1 of the License, or
	(at your option) any later version.

	systemd is distributed in the hope that it will be useful, but
	WITHOUT ANY WARRANTY; without even the implied warranty of
	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	Lesser General Public License for more details.

	You should have received a copy of the GNU Lesser General Public License
	along with systemd; If not, see <http://www.gnu.org/licenses/>.
	***/

	#include <string.h>
	#include <stdio.h>
	#include <errno.h>
	#include <assert.h>
	#include <stdlib.h>

	#include "conf-parser.h"
	#include "util.h"
	#include "macro.h"
	#include "strv.h"
	#include "log.h"
	#include "utf8.h"
	#include "path-util.h"
	#include "set.h"
	#include "exit-status.h"

	int config_item_table_lookup(
	void *table,
	const char *section,
	const char *lvalue,
	ConfigParserCallback *func,
	int *ltype,
	void **data,
	void *userdata) {

	ConfigTableItem *t;

	assert(table);
	assert(lvalue);
	assert(func);
	assert(ltype);
	assert(data);

	for (t = table; t->lvalue; t++) {

	if (!streq(lvalue, t->lvalue))
	continue;

	if (!streq_ptr(section, t->section))
	continue;

	*func = t->parse;
	*ltype = t->ltype;
	*data = t->data;
	return 1;
	}

	return 0;
	}

	int config_item_perf_lookup(
	void *table,
	const char *section,
	const char *lvalue,
	ConfigParserCallback *func,
	int *ltype,
	void **data,
	void *userdata) {

	ConfigPerfItemLookup lookup = (ConfigPerfItemLookup) table;
	const ConfigPerfItem *p;

	assert(table);
	assert(lvalue);
	assert(func);
	assert(ltype);
	assert(data);

	if (!section)
	p = lookup(lvalue, strlen(lvalue));
	else {
	char *key;

	key = strjoin(section, ".", lvalue, NULL);
	if (!key)
	return -ENOMEM;

	p = lookup(key, strlen(key));
	free(key);
	}

	if (!p)
	return 0;

	*func = p->parse;
	*ltype = p->ltype;
	data = (uint8_t) userdata + p->offset;
	return 1;
	}

	/* Run the user supplied parser for an assignment */
	static int next_assignment(
	const char *filename,
	unsigned line,
	ConfigItemLookup lookup,
	void *table,
	const char *section,
	const char *lvalue,
	const char *rvalue,
	bool relaxed,
	void *userdata) {

	ConfigParserCallback func = NULL;
	int ltype = 0;
	void *data = NULL;
	int r;

	assert(filename);
	assert(line > 0);
	assert(lookup);
	assert(lvalue);
	assert(rvalue);

	r = lookup(table, section, lvalue, &func, &ltype, &data, userdata);
	if (r < 0)
	return r;

	if (r > 0) {
	if (func)
	return func(filename, line, section, lvalue, ltype, rvalue, data, userdata);

	return 0;
	}

	/* Warn about unknown non-extension fields. */
	if (!relaxed && !startswith(lvalue, "X-"))
	log_info("[%s:%u] Unknown lvalue '%s' in section '%s'. Ignoring.", filename, line, lvalue, section);

	return 0;
	}

	/* Parse a variable assignment line */
	static int parse_line(
	const char *filename,
	unsigned line,
	const char *sections,
	ConfigItemLookup lookup,
	void *table,
	bool relaxed,
	char **section,
	char *l,
	void *userdata) {

	char *e;

	assert(filename);
	assert(line > 0);
	assert(lookup);
	assert(l);

	l = strstrip(l);

	if (!*l)
	return 0;

	if (strchr(COMMENTS, *l))
	return 0;

	if (startswith(l, ".include ")) {
	char *fn;
	int r;

	fn = file_in_same_dir(filename, strstrip(l+9));
	if (!fn)
	return -ENOMEM;

	r = config_parse(fn, NULL, sections, lookup, table, relaxed, userdata);
	free(fn);

	return r;
	}

	if (*l == '[') {
	size_t k;
	char *n;

	k = strlen(l);
	assert(k > 0);

	if (l[k-1] != ']') {
	log_error("[%s:%u] Invalid section header.", filename, line);
	return -EBADMSG;
	}

	n = strndup(l+1, k-2);
	if (!n)
	return -ENOMEM;

	if (sections && !nulstr_contains(sections, n)) {

	if (!relaxed)
	log_info("[%s:%u] Unknown section '%s'. Ignoring.", filename, line, n);

	free(n);
	*section = NULL;
	} else {
	free(*section);
	*section = n;
	}

	return 0;
	}

	if (sections && !*section) {

	if (!relaxed)
	log_info("[%s:%u] Assignment outside of section. Ignoring.", filename, line);

	return 0;
	}

	e = strchr(l, '=');
	if (!e) {
	log_error("[%s:%u] Missing '='.", filename, line);
	return -EBADMSG;
	}

	*e = 0;
	e++;

	return next_assignment(
	filename,
	line,
	lookup,
	table,
	*section,
	strstrip(l),
	strstrip(e),
	relaxed,
	userdata);
	}

	/* Go through the file and parse each line */
	int config_parse(
	const char *filename,
	FILE *f,
	const char *sections,
	ConfigItemLookup lookup,
	void *table,
	bool relaxed,
	void *userdata) {

	unsigned line = 0;
	char *section = NULL;
	int r;
	bool ours = false;
	char *continuation = NULL;

	assert(filename);
	assert(lookup);

	if (!f) {
	f = fopen(filename, "re");
	if (!f) {
	r = -errno;
	log_error("Failed to open configuration file '%s': %s", filename, strerror(-r));
	goto finish;
	}

	ours = true;
	}

	while (!feof(f)) {
	char l[LINE_MAX], p, c = NULL, *e;
	bool escaped = false;

	if (!fgets(l, sizeof(l), f)) {
	if (feof(f))
	break;

	r = -errno;
	log_error("Failed to read configuration file '%s': %s", filename, strerror(-r));
	goto finish;
	}

	truncate_nl(l);

	if (continuation) {
	c = strappend(continuation, l);
	if (!c) {
	r = -ENOMEM;
	goto finish;
	}

	free(continuation);
	continuation = NULL;
	p = c;
	} else
	p = l;

	for (e = p; *e; e++) {
	if (escaped)
	escaped = false;
	else if (*e == '\\')
	escaped = true;
	}

	if (escaped) {
	*(e-1) = ' ';

	if (c)
	continuation = c;
	else {
	continuation = strdup(l);
	if (!continuation) {
	r = -ENOMEM;
	goto finish;
	}
	}

	continue;
	}

	r = parse_line(filename,
	++line,
	sections,
	lookup,
	table,
	relaxed,
	&section,
	p,
	userdata);
	free(c);

	if (r < 0)
	goto finish;
	}

	r = 0;

	finish:
	free(section);
	free(continuation);

	if (f && ours)
	fclose(f);

	return r;
	}

	int config_parse_int(
	const char *filename,
	unsigned line,
	const char *section,
	const char *lvalue,
	int ltype,
	const char *rvalue,
	void *data,
	void *userdata) {

	int *i = data;
	int r;

	assert(filename);
	assert(lvalue);
	assert(rvalue);
	assert(data);

	r = safe_atoi(rvalue, i);
	if (r < 0) {
	log_error("[%s:%u] Failed to parse numeric value, ingoring: %s", filename, line, rvalue);
	return 0;
	}

	return 0;
	}

	int config_parse_long(
	const char *filename,
	unsigned line,
	const char *section,
	const char *lvalue,
	int ltype,
	const char *rvalue,
	void *data,
	void *userdata) {

	long *i = data;
	int r;

	assert(filename);
	assert(lvalue);
	assert(rvalue);
	assert(data);

	r = safe_atoli(rvalue, i);
	if (r < 0) {
	log_error("[%s:%u] Failed to parse numeric value, ignoring: %s", filename, line, rvalue);
	return 0;
	}

	return 0;
	}

	int config_parse_uint64(
	const char *filename,
	unsigned line,
	const char *section,
	const char *lvalue,
	int ltype,
	const char *rvalue,
	void *data,
	void *userdata) {

	uint64_t *u = data;
	int r;

	assert(filename);
	assert(lvalue);
	assert(rvalue);
	assert(data);

	r = safe_atou64(rvalue, u);
	if (r < 0) {
	log_error("[%s:%u] Failed to parse numeric value, ignoring: %s", filename, line, rvalue);
	return 0;
	}

	return 0;
	}

	int config_parse_unsigned(
	const char *filename,
	unsigned line,
	const char *section,
	const char *lvalue,
	int ltype,
	const char *rvalue,
	void *data,
	void *userdata) {

	unsigned *u = data;
	int r;

	assert(filename);
	assert(lvalue);
	assert(rvalue);
	assert(data);

	r = safe_atou(rvalue, u);
	if (r < 0) {
	log_error("[%s:%u] Failed to parse numeric value: %s", filename, line, rvalue);
	return r;
	}

	return 0;
	}

	int config_parse_double(
	const char *filename,
	unsigned line,
	const char *section,
	const char *lvalue,
	int ltype,
	const char *rvalue,
	void *data,
	void *userdata) {

	double *d = data;
	int r;

	assert(filename);
	assert(lvalue);
	assert(rvalue);
	assert(data);

	r = safe_atod(rvalue, d);
	if (r < 0) {
	log_error("[%s:%u] Failed to parse numeric value: %s", filename, line, rvalue);
	return r;
	}

	return 0;
	}

	int config_parse_bytes_size(
	const char *filename,
	unsigned line,
	const char *section,
	const char *lvalue,
	int ltype,
	const char *rvalue,
	void *data,
	void *userdata) {

	size_t *sz = data;
	off_t o;

	assert(filename);
	assert(lvalue);
	assert(rvalue);
	assert(data);

	if (parse_bytes(rvalue, &o) < 0 \|\| (off_t) (size_t) o != o) {
	log_error("[%s:%u] Failed to parse byte value, ignoring: %s", filename, line, rvalue);
	return 0;
	}

	*sz = (size_t) o;
	return 0;
	}


	int config_parse_bytes_off(
	const char *filename,
	unsigned line,
	const char *section,
	const char *lvalue,
	int ltype,
	const char *rvalue,
	void *data,
	void *userdata) {

	off_t *bytes = data;

	assert(filename);
	assert(lvalue);
	assert(rvalue);
	assert(data);

	assert_cc(sizeof(off_t) == sizeof(uint64_t));

	if (parse_bytes(rvalue, bytes) < 0) {
	log_error("[%s:%u] Failed to parse bytes value, ignoring: %s", filename, line, rvalue);
	return 0;
	}

	return 0;
	}

	int config_parse_bool(
	const char *filename,
	unsigned line,
	const char *section,
	const char *lvalue,
	int ltype,
	const char *rvalue,
	void *data,
	void *userdata) {

	int k;
	bool *b = data;

	assert(filename);
	assert(lvalue);
	assert(rvalue);
	assert(data);

	if ((k = parse_boolean(rvalue)) < 0) {
	log_error("[%s:%u] Failed to parse boolean value, ignoring: %s", filename, line, rvalue);
	return 0;
	}

	*b = !!k;
	return 0;
	}

	int config_parse_tristate(
	const char *filename,
	unsigned line,
	const char *section,
	const char *lvalue,
	int ltype,
	const char *rvalue,
	void *data,
	void *userdata) {

	int k;
	int *b = data;

	assert(filename);
	assert(lvalue);
	assert(rvalue);
	assert(data);

	/* Tristates are like booleans, but can also take the 'default' value, i.e. "-1" */

	k = parse_boolean(rvalue);
	if (k < 0) {
	log_error("[%s:%u] Failed to parse boolean value, ignoring: %s", filename, line, rvalue);
	return 0;
	}

	*b = !!k;
	return 0;
	}

	int config_parse_string(
	const char *filename,
	unsigned line,
	const char *section,
	const char *lvalue,
	int ltype,
	const char *rvalue,
	void *data,
	void *userdata) {

	char **s = data;
	char *n;

	assert(filename);
	assert(lvalue);
	assert(rvalue);
	assert(data);

	n = strdup(rvalue);
	if (!n)
	return log_oom();

	if (!utf8_is_valid(n)) {
	log_error("[%s:%u] String is not UTF-8 clean, ignoring assignment: %s", filename, line, rvalue);
	free(n);
	return 0;
	}

	free(*s);
	if (*n)
	*s = n;
	else {
	free(n);
	*s = NULL;
	}

	return 0;
	}

	int config_parse_path(
	const char *filename,
	unsigned line,
	const char *section,
	const char *lvalue,
	int ltype,
	const char *rvalue,
	void *data,
	void *userdata) {

	char **s = data;
	char *n;

	assert(filename);
	assert(lvalue);
	assert(rvalue);
	assert(data);

	if (!utf8_is_valid(rvalue)) {
	log_error("[%s:%u] Path is not UTF-8 clean, ignoring assignment: %s", filename, line, rvalue);
	return 0;
	}

	if (!path_is_absolute(rvalue)) {
	log_error("[%s:%u] Not an absolute path, ignoring: %s", filename, line, rvalue);
	return 0;
	}

	n = strdup(rvalue);
	if (!n)
	return log_oom();

	path_kill_slashes(n);

	free(*s);
	*s = n;

	return 0;
	}

	int config_parse_strv(
	const char *filename,
	unsigned line,
	const char *section,
	const char *lvalue,
	int ltype,
	const char *rvalue,
	void *data,
	void *userdata) {

	char *** sv = data, w, state;
	size_t l;
	int r;

	assert(filename);
	assert(lvalue);
	assert(rvalue);
	assert(data);

	if (isempty(rvalue)) {
	char **empty;

	/* Empty assignment resets the list. As a special rule
	* we actually fill in a real empty array here rather
	* than NULL, since some code wants to know if
	* something was set at all... */
	empty = strv_new(NULL, NULL);
	if (!empty)
	return log_oom();

	strv_free(*sv);
	*sv = empty;
	return 0;
	}

	FOREACH_WORD_QUOTED(w, l, rvalue, state) {
	_cleanup_free_ char *n;

	n = cunescape_length(w, l);
	if (!n)
	return log_oom();

	if (!utf8_is_valid(n)) {
	log_error("[%s:%u] String is not UTF-8 clean, ignoring: %s", filename, line, rvalue);
	continue;
	}

	r = strv_extend(sv, n);
	if (r < 0)
	return log_oom();
	}

	return 0;
	}

	int config_parse_path_strv(
	const char *filename,
	unsigned line,
	const char *section,
	const char *lvalue,
	int ltype,
	const char *rvalue,
	void *data,
	void *userdata) {

	char*** sv = data, w, state;
	size_t l;
	int r;

	assert(filename);
	assert(lvalue);
	assert(rvalue);
	assert(data);

	if (isempty(rvalue)) {
	/* Empty assignment resets the list */
	strv_free(*sv);
	*sv = NULL;
	return 0;
	}

	FOREACH_WORD_QUOTED(w, l, rvalue, state) {
	_cleanup_free_ char *n;

	n = strndup(w, l);
	if (!n)
	return log_oom();

	if (!utf8_is_valid(n)) {
	log_error("[%s:%u] Path is not UTF-8 clean, ignoring assignment: %s", filename, line, rvalue);
	continue;
	}

	if (!path_is_absolute(n)) {
	log_error("[%s:%u] Not an absolute path, ignoring: %s", filename, line, rvalue);
	continue;
	}

	path_kill_slashes(n);
	r = strv_extend(sv, n);
	if (r < 0)
	return log_oom();
	}

	return 0;
	}

	int config_parse_usec(
	const char *filename,
	unsigned line,
	const char *section,
	const char *lvalue,
	int ltype,
	const char *rvalue,
	void *data,
	void *userdata) {

	usec_t *usec = data;

	assert(filename);
	assert(lvalue);
	assert(rvalue);
	assert(data);

	if (parse_usec(rvalue, usec) < 0) {
	log_error("[%s:%u] Failed to parse time value, ignoring: %s", filename, line, rvalue);
	return 0;
	}

	return 0;
	}

	int config_parse_nsec(
	const char *filename,
	unsigned line,
	const char *section,
	const char *lvalue,
	int ltype,
	const char *rvalue,
	void *data,
	void *userdata) {

	nsec_t *nsec = data;

	assert(filename);
	assert(lvalue);
	assert(rvalue);
	assert(data);

	if (parse_nsec(rvalue, nsec) < 0) {
	log_error("[%s:%u] Failed to parse time value, ignoring: %s", filename, line, rvalue);
	return 0;
	}

	return 0;
	}

	int config_parse_mode(
	const char *filename,
	unsigned line,
	const char *section,
	const char *lvalue,
	int ltype,
	const char *rvalue,
	void *data,
	void *userdata) {

	mode_t *m = data;
	long l;
	char *x = NULL;

	assert(filename);
	assert(lvalue);
	assert(rvalue);
	assert(data);

	errno = 0;
	l = strtol(rvalue, &x, 8);
	if (!x \|\| x == rvalue \|\| *x \|\| errno) {
	log_error("[%s:%u] Failed to parse mode value, ignoring: %s", filename, line, rvalue);
	return 0;
	}

	if (l < 0000 \|\| l > 07777) {
	log_error("[%s:%u] mode value out of range, ignoring: %s", filename, line, rvalue);
	return 0;
	}

	*m = (mode_t) l;
	return 0;
	}

	int config_parse_facility(
	const char *filename,
	unsigned line,
	const char *section,
	const char *lvalue,
	int ltype,
	const char *rvalue,
	void *data,
	void *userdata) {


	int *o = data, x;

	assert(filename);
	assert(lvalue);
	assert(rvalue);
	assert(data);

	x = log_facility_unshifted_from_string(rvalue);
	if (x < 0) {
	log_error("[%s:%u] Failed to parse log facility, ignoring: %s", filename, line, rvalue);
	return 0;
	}

	o = (x << 3) \| LOG_PRI(o);

	return 0;
	}

	int config_parse_level(
	const char *filename,
	unsigned line,
	const char *section,
	const char *lvalue,
	int ltype,
	const char *rvalue,
	void *data,
	void *userdata) {


	int *o = data, x;

	assert(filename);
	assert(lvalue);
	assert(rvalue);
	assert(data);

	x = log_level_from_string(rvalue);
	if (x < 0) {
	log_error("[%s:%u] Failed to parse log level, ignoring: %s", filename, line, rvalue);
	return 0;
	}

	o = (o & LOG_FACMASK) \| x;
	return 0;
	}

	int config_parse_set_status(
	const char *filename,
	unsigned line,
	const char *section,
	const char *lvalue,
	int ltype,
	const char *rvalue,
	void *data,
	void *userdata) {

	char *w;
	size_t l;
	char *state;
	int r;
	ExitStatusSet *status_set = data;

	assert(filename);
	assert(lvalue);
	assert(rvalue);
	assert(data);

	if (isempty(rvalue)) {
	/* Empty assignment resets the list */

	set_free(status_set->signal);
	set_free(status_set->code);

	status_set->signal = status_set->code = NULL;
	return 0;
	}

	FOREACH_WORD(w, l, rvalue, state) {
	int val;
	char *temp;

	temp = strndup(w, l);
	if (!temp)
	return log_oom();

	r = safe_atoi(temp, &val);
	if (r < 0) {
	val = signal_from_string_try_harder(temp);
	free(temp);

	if (val > 0) {
	r = set_ensure_allocated(&status_set->signal, trivial_hash_func, trivial_compare_func);
	if (r < 0)
	return log_oom();

	r = set_put(status_set->signal, INT_TO_PTR(val));
	if (r < 0) {
	log_error("[%s:%u] Unable to store: %s", filename, line, w);
	return r;
	}
	} else {
	log_error("[%s:%u] Failed to parse value, ignoring: %s", filename, line, w);
	return 0;
	}
	} else {
	free(temp);

	if (val < 0 \|\| val > 255)
	log_warning("[%s:%u] Value %d is outside range 0-255, ignoring", filename, line, val);
	else {
	r = set_ensure_allocated(&status_set->code, trivial_hash_func, trivial_compare_func);
	if (r < 0)
	return log_oom();

	r = set_put(status_set->code, INT_TO_PTR(val));
	if (r < 0) {
	log_error("[%s:%u] Unable to store: %s", filename, line, w);
	return r;
	}
	}
	}
	}

	return 0;
	}