9b3a67c55b
The constraints we place on the pool is that it is a contiguous sequence of addresses in the same subnet as the server address, not including the subnet nor broadcast addresses, but possibly including the server address itself. If the server address is included in the pool it is (obviously) reserved and not handed out to clients.
805 lines
24 KiB
C
805 lines
24 KiB
C
/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
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/***
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This file is part of systemd.
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Copyright 2010 Lennart Poettering
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systemd is free software; you can redistribute it and/or modify it
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under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation; either version 2.1 of the License, or
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(at your option) any later version.
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systemd is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with systemd; If not, see <http://www.gnu.org/licenses/>.
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***/
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#include <string.h>
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#include <stdio.h>
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#include <errno.h>
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#include <stdlib.h>
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#include "conf-parser.h"
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#include "conf-files.h"
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#include "util.h"
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#include "macro.h"
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#include "strv.h"
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#include "log.h"
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#include "utf8.h"
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#include "path-util.h"
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#include "sd-messages.h"
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int config_item_table_lookup(
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const void *table,
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const char *section,
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const char *lvalue,
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ConfigParserCallback *func,
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int *ltype,
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void **data,
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void *userdata) {
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const ConfigTableItem *t;
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assert(table);
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assert(lvalue);
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assert(func);
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assert(ltype);
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assert(data);
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for (t = table; t->lvalue; t++) {
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if (!streq(lvalue, t->lvalue))
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continue;
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if (!streq_ptr(section, t->section))
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continue;
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*func = t->parse;
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*ltype = t->ltype;
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*data = t->data;
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return 1;
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}
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return 0;
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}
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int config_item_perf_lookup(
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const void *table,
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const char *section,
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const char *lvalue,
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ConfigParserCallback *func,
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int *ltype,
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void **data,
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void *userdata) {
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ConfigPerfItemLookup lookup = (ConfigPerfItemLookup) table;
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const ConfigPerfItem *p;
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assert(table);
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assert(lvalue);
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assert(func);
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assert(ltype);
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assert(data);
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if (!section)
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p = lookup(lvalue, strlen(lvalue));
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else {
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char *key;
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key = strjoin(section, ".", lvalue, NULL);
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if (!key)
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return -ENOMEM;
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p = lookup(key, strlen(key));
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free(key);
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}
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if (!p)
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return 0;
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*func = p->parse;
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*ltype = p->ltype;
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*data = (uint8_t*) userdata + p->offset;
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return 1;
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}
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/* Run the user supplied parser for an assignment */
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static int next_assignment(const char *unit,
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const char *filename,
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unsigned line,
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ConfigItemLookup lookup,
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const void *table,
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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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const char *rvalue,
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bool relaxed,
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void *userdata) {
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ConfigParserCallback func = NULL;
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int ltype = 0;
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void *data = NULL;
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int r;
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assert(filename);
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assert(line > 0);
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assert(lookup);
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assert(lvalue);
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assert(rvalue);
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r = lookup(table, section, lvalue, &func, <ype, &data, userdata);
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if (r < 0)
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return r;
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if (r > 0) {
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if (func)
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return func(unit, filename, line, section, section_line,
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lvalue, ltype, rvalue, data, userdata);
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return 0;
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}
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/* Warn about unknown non-extension fields. */
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if (!relaxed && !startswith(lvalue, "X-"))
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log_syntax(unit, LOG_WARNING, filename, line, EINVAL,
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"Unknown lvalue '%s' in section '%s'", lvalue, section);
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return 0;
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}
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/* Parse a variable assignment line */
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static int parse_line(const char* unit,
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const char *filename,
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unsigned line,
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const char *sections,
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ConfigItemLookup lookup,
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const void *table,
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bool relaxed,
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bool allow_include,
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char **section,
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unsigned *section_line,
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bool *section_ignored,
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char *l,
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void *userdata) {
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char *e;
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assert(filename);
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assert(line > 0);
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assert(lookup);
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assert(l);
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l = strstrip(l);
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if (!*l)
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return 0;
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if (strchr(COMMENTS "\n", *l))
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return 0;
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if (startswith(l, ".include ")) {
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_cleanup_free_ char *fn = NULL;
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/* .includes are a bad idea, we only support them here
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* for historical reasons. They create cyclic include
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* problems and make it difficult to detect
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* configuration file changes with an easy
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* stat(). Better approaches, such as .d/ drop-in
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* snippets exist.
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*
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* Support for them should be eventually removed. */
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if (!allow_include) {
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log_syntax(unit, LOG_ERR, filename, line, EBADMSG,
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".include not allowed here. Ignoring.");
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return 0;
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}
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fn = file_in_same_dir(filename, strstrip(l+9));
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if (!fn)
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return -ENOMEM;
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return config_parse(unit, fn, NULL, sections, lookup, table, relaxed, false, false, userdata);
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}
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if (*l == '[') {
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size_t k;
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char *n;
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k = strlen(l);
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assert(k > 0);
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if (l[k-1] != ']') {
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log_syntax(unit, LOG_ERR, filename, line, EBADMSG,
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"Invalid section header '%s'", l);
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return -EBADMSG;
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}
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n = strndup(l+1, k-2);
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if (!n)
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return -ENOMEM;
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if (sections && !nulstr_contains(sections, n)) {
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if (!relaxed && !startswith(n, "X-"))
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log_syntax(unit, LOG_WARNING, filename, line, EINVAL,
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"Unknown section '%s'. Ignoring.", n);
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free(n);
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free(*section);
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*section = NULL;
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*section_line = 0;
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*section_ignored = true;
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} else {
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free(*section);
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*section = n;
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*section_line = line;
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*section_ignored = false;
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}
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return 0;
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}
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if (sections && !*section) {
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if (!relaxed && !*section_ignored)
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log_syntax(unit, LOG_WARNING, filename, line, EINVAL,
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"Assignment outside of section. Ignoring.");
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return 0;
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}
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e = strchr(l, '=');
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if (!e) {
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log_syntax(unit, LOG_WARNING, filename, line, EINVAL, "Missing '='.");
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return -EBADMSG;
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}
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*e = 0;
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e++;
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return next_assignment(unit,
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filename,
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line,
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lookup,
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table,
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*section,
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*section_line,
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strstrip(l),
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strstrip(e),
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relaxed,
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userdata);
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}
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/* Go through the file and parse each line */
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int config_parse(const char *unit,
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const char *filename,
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FILE *f,
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const char *sections,
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ConfigItemLookup lookup,
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const void *table,
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bool relaxed,
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bool allow_include,
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bool warn,
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void *userdata) {
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_cleanup_free_ char *section = NULL, *continuation = NULL;
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_cleanup_fclose_ FILE *ours = NULL;
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unsigned line = 0, section_line = 0;
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bool section_ignored = false;
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int r;
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assert(filename);
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assert(lookup);
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if (!f) {
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f = ours = fopen(filename, "re");
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if (!f) {
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/* Only log on request, except for ENOENT,
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* since we return 0 to the caller. */
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if (warn || errno == ENOENT)
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log_full(errno == ENOENT ? LOG_DEBUG : LOG_ERR,
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"Failed to open configuration file '%s': %m", filename);
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return errno == ENOENT ? 0 : -errno;
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}
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}
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fd_warn_permissions(filename, fileno(f));
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while (!feof(f)) {
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char l[LINE_MAX], *p, *c = NULL, *e;
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bool escaped = false;
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if (!fgets(l, sizeof(l), f)) {
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if (feof(f))
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break;
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log_error_errno(errno, "Failed to read configuration file '%s': %m", filename);
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return -errno;
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}
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truncate_nl(l);
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if (continuation) {
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c = strappend(continuation, l);
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if (!c) {
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if (warn)
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log_oom();
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return -ENOMEM;
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}
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continuation = mfree(continuation);
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p = c;
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} else
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p = l;
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for (e = p; *e; e++) {
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if (escaped)
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escaped = false;
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else if (*e == '\\')
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escaped = true;
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}
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if (escaped) {
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*(e-1) = ' ';
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if (c)
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continuation = c;
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else {
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continuation = strdup(l);
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if (!continuation) {
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if (warn)
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log_oom();
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return -ENOMEM;
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}
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}
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continue;
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}
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r = parse_line(unit,
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filename,
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++line,
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sections,
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lookup,
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table,
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relaxed,
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allow_include,
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§ion,
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§ion_line,
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§ion_ignored,
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p,
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userdata);
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free(c);
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if (r < 0) {
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if (warn)
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log_warning_errno(r, "Failed to parse file '%s': %m",
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filename);
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return r;
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}
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}
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return 0;
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}
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/* Parse each config file in the specified directories. */
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int config_parse_many(const char *conf_file,
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const char *conf_file_dirs,
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const char *sections,
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ConfigItemLookup lookup,
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const void *table,
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bool relaxed,
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void *userdata) {
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_cleanup_strv_free_ char **files = NULL;
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char **fn;
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int r;
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r = conf_files_list_nulstr(&files, ".conf", NULL, conf_file_dirs);
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if (r < 0)
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return r;
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if (conf_file) {
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r = config_parse(NULL, conf_file, NULL, sections, lookup, table, relaxed, false, true, userdata);
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if (r < 0)
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return r;
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}
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STRV_FOREACH(fn, files) {
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r = config_parse(NULL, *fn, NULL, sections, lookup, table, relaxed, false, true, userdata);
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if (r < 0)
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return r;
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}
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return 0;
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}
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#define DEFINE_PARSER(type, vartype, conv_func) \
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int config_parse_##type(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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\
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vartype *i = data; \
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int r; \
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\
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assert(filename); \
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assert(lvalue); \
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assert(rvalue); \
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assert(data); \
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\
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r = conv_func(rvalue, i); \
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if (r < 0) \
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log_syntax(unit, LOG_ERR, filename, line, -r, \
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"Failed to parse %s value, ignoring: %s", \
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#type, rvalue); \
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\
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return 0; \
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}
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DEFINE_PARSER(int, int, safe_atoi)
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DEFINE_PARSER(long, long, safe_atoli)
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DEFINE_PARSER(uint32, uint32_t, safe_atou32)
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DEFINE_PARSER(uint64, uint64_t, safe_atou64)
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DEFINE_PARSER(unsigned, unsigned, safe_atou)
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DEFINE_PARSER(double, double, safe_atod)
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DEFINE_PARSER(nsec, nsec_t, parse_nsec)
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DEFINE_PARSER(sec, usec_t, parse_sec)
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int config_parse_iec_size(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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size_t *sz = data;
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off_t o;
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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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assert(data);
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r = parse_size(rvalue, 1024, &o);
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if (r < 0 || (off_t) (size_t) o != o) {
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log_syntax(unit, LOG_ERR, filename, line, r < 0 ? -r : ERANGE, "Failed to parse size value, ignoring: %s", rvalue);
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return 0;
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}
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*sz = (size_t) o;
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return 0;
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}
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int config_parse_si_size(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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size_t *sz = data;
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off_t o;
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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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assert(data);
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r = parse_size(rvalue, 1000, &o);
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if (r < 0 || (off_t) (size_t) o != o) {
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log_syntax(unit, LOG_ERR, filename, line, r < 0 ? -r : ERANGE, "Failed to parse size value, ignoring: %s", rvalue);
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return 0;
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}
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*sz = (size_t) o;
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return 0;
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}
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int config_parse_iec_off(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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off_t *bytes = 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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assert(data);
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assert_cc(sizeof(off_t) == sizeof(uint64_t));
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r = parse_size(rvalue, 1024, bytes);
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if (r < 0)
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log_syntax(unit, LOG_ERR, filename, line, -r, "Failed to parse size value, ignoring: %s", rvalue);
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return 0;
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}
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int config_parse_bool(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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int k;
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bool *b = data;
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assert(filename);
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assert(lvalue);
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assert(rvalue);
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assert(data);
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k = parse_boolean(rvalue);
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if (k < 0) {
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log_syntax(unit, LOG_ERR, filename, line, -k,
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"Failed to parse boolean value, ignoring: %s", rvalue);
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return 0;
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}
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*b = !!k;
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return 0;
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}
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int config_parse_string(
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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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char **s = data, *n;
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assert(filename);
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assert(lvalue);
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assert(rvalue);
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assert(data);
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if (!utf8_is_valid(rvalue)) {
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log_invalid_utf8(unit, LOG_ERR, filename, line, EINVAL, rvalue);
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return 0;
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}
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if (isempty(rvalue))
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n = NULL;
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else {
|
|
n = strdup(rvalue);
|
|
if (!n)
|
|
return log_oom();
|
|
}
|
|
|
|
free(*s);
|
|
*s = n;
|
|
|
|
return 0;
|
|
}
|
|
|
|
int config_parse_path(
|
|
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, *n;
|
|
|
|
assert(filename);
|
|
assert(lvalue);
|
|
assert(rvalue);
|
|
assert(data);
|
|
|
|
if (!utf8_is_valid(rvalue)) {
|
|
log_invalid_utf8(unit, LOG_ERR, filename, line, EINVAL, rvalue);
|
|
return 0;
|
|
}
|
|
|
|
if (!path_is_absolute(rvalue)) {
|
|
log_syntax(unit, LOG_ERR, filename, line, EINVAL, "Not an absolute path, ignoring: %s", 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 *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 ***sv = data;
|
|
const char *word, *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(word, l, rvalue, state) {
|
|
char *n;
|
|
|
|
n = strndup(word, l);
|
|
if (!n)
|
|
return log_oom();
|
|
|
|
if (!utf8_is_valid(n)) {
|
|
log_invalid_utf8(unit, LOG_ERR, filename, line, EINVAL, rvalue);
|
|
free(n);
|
|
continue;
|
|
}
|
|
|
|
r = strv_consume(sv, n);
|
|
if (r < 0)
|
|
return log_oom();
|
|
}
|
|
if (!isempty(state))
|
|
log_syntax(unit, LOG_ERR, filename, line, EINVAL,
|
|
"Trailing garbage, ignoring.");
|
|
|
|
return 0;
|
|
}
|
|
|
|
int config_parse_mode(
|
|
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) {
|
|
|
|
mode_t *m = data;
|
|
|
|
assert(filename);
|
|
assert(lvalue);
|
|
assert(rvalue);
|
|
assert(data);
|
|
|
|
if (parse_mode(rvalue, m) < 0) {
|
|
log_syntax(unit, LOG_ERR, filename, line, errno, "Failed to parse mode value, ignoring: %s", rvalue);
|
|
return 0;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
int config_parse_log_facility(
|
|
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) {
|
|
|
|
|
|
int *o = data, x;
|
|
|
|
assert(filename);
|
|
assert(lvalue);
|
|
assert(rvalue);
|
|
assert(data);
|
|
|
|
x = log_facility_unshifted_from_string(rvalue);
|
|
if (x < 0) {
|
|
log_syntax(unit, LOG_ERR, filename, line, EINVAL, "Failed to parse log facility, ignoring: %s", rvalue);
|
|
return 0;
|
|
}
|
|
|
|
*o = (x << 3) | LOG_PRI(*o);
|
|
|
|
return 0;
|
|
}
|
|
|
|
int config_parse_log_level(
|
|
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) {
|
|
|
|
|
|
int *o = data, x;
|
|
|
|
assert(filename);
|
|
assert(lvalue);
|
|
assert(rvalue);
|
|
assert(data);
|
|
|
|
x = log_level_from_string(rvalue);
|
|
if (x < 0) {
|
|
log_syntax(unit, LOG_ERR, filename, line, EINVAL, "Failed to parse log level, ignoring: %s", rvalue);
|
|
return 0;
|
|
}
|
|
|
|
*o = (*o & LOG_FACMASK) | x;
|
|
return 0;
|
|
}
|