1008 lines
26 KiB
C
1008 lines
26 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 <assert.h>
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#include <stdlib.h>
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#include "conf-parser.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 "set.h"
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#include "exit-status.h"
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int config_item_table_lookup(
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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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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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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(
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const char *filename,
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unsigned line,
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ConfigItemLookup lookup,
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void *table,
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const char *section,
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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(filename, line, section, 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_info("[%s:%u] Unknown lvalue '%s' in section '%s'. Ignoring.", filename, line, 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(
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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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void *table,
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bool relaxed,
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char **section,
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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, *l))
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return 0;
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if (startswith(l, ".include ")) {
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char *fn;
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int r;
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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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r = config_parse(fn, NULL, sections, lookup, table, relaxed, userdata);
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free(fn);
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return r;
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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_error("[%s:%u] Invalid section header.", filename, line);
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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)
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log_info("[%s:%u] Unknown section '%s'. Ignoring.", filename, line, n);
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free(n);
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*section = NULL;
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} else {
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free(*section);
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*section = n;
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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)
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log_info("[%s:%u] Assignment outside of section. Ignoring.", filename, line);
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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_error("[%s:%u] Missing '='.", filename, line);
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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(
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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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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(
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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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void *table,
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bool relaxed,
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void *userdata) {
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unsigned line = 0;
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char *section = NULL;
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int r;
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bool ours = false;
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char *continuation = NULL;
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assert(filename);
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assert(lookup);
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if (!f) {
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f = fopen(filename, "re");
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if (!f) {
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r = -errno;
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log_error("Failed to open configuration file '%s': %s", filename, strerror(-r));
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goto finish;
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}
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ours = true;
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}
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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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r = -errno;
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log_error("Failed to read configuration file '%s': %s", filename, strerror(-r));
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goto finish;
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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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r = -ENOMEM;
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goto finish;
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}
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free(continuation);
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continuation = NULL;
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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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r = -ENOMEM;
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goto finish;
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}
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}
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continue;
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}
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r = parse_line(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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§ion,
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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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goto finish;
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}
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r = 0;
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finish:
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free(section);
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free(continuation);
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if (f && ours)
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fclose(f);
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return r;
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}
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int config_parse_int(
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const char *filename,
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unsigned line,
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const char *section,
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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 *i = 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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if ((r = safe_atoi(rvalue, i)) < 0) {
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log_error("[%s:%u] Failed to parse numeric value, ingoring: %s", filename, line, 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_long(
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const char *filename,
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unsigned line,
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const char *section,
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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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long *i = 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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if ((r = safe_atoli(rvalue, i)) < 0) {
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log_error("[%s:%u] Failed to parse numeric value, ignoring: %s", filename, line, 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_uint64(
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const char *filename,
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unsigned line,
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const char *section,
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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 = 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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if ((r = safe_atou64(rvalue, u)) < 0) {
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log_error("[%s:%u] Failed to parse numeric value, ignoring: %s", filename, line, 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_unsigned(
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const char *filename,
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unsigned line,
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const char *section,
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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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unsigned *u = 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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if ((r = safe_atou(rvalue, u)) < 0) {
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log_error("[%s:%u] Failed to parse numeric value: %s", filename, line, rvalue);
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return r;
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}
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return 0;
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}
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int config_parse_bytes_size(
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const char *filename,
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unsigned line,
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const char *section,
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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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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 (parse_bytes(rvalue, &o) < 0 || (off_t) (size_t) o != o) {
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log_error("[%s:%u] Failed to parse byte value, ignoring: %s", filename, line, 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_bytes_off(
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const char *filename,
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unsigned line,
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const char *section,
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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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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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if (parse_bytes(rvalue, bytes) < 0) {
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log_error("[%s:%u] Failed to parse bytes value, ignoring: %s", filename, line, 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_bool(
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const char *filename,
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unsigned line,
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const char *section,
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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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if ((k = parse_boolean(rvalue)) < 0) {
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log_error("[%s:%u] Failed to parse boolean value, ignoring: %s", filename, line, 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_tristate(
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const char *filename,
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unsigned line,
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const char *section,
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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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int *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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/* Tristates are like booleans, but can also take the 'default' value, i.e. "-1" */
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k = parse_boolean(rvalue);
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if (k < 0) {
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log_error("[%s:%u] Failed to parse boolean value, ignoring: %s", filename, line, 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 *filename,
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unsigned line,
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const char *section,
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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;
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char *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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n = strdup(rvalue);
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if (!n)
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return -ENOMEM;
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if (!utf8_is_valid(n)) {
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log_error("[%s:%u] String is not UTF-8 clean, ignoring assignment: %s", filename, line, rvalue);
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free(n);
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return 0;
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}
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free(*s);
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if (*n)
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*s = n;
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else {
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free(n);
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*s = NULL;
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}
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return 0;
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}
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int config_parse_path(
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const char *filename,
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unsigned line,
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const char *section,
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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;
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char *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_error("[%s:%u] Path is not UTF-8 clean, ignoring assignment: %s", filename, line, rvalue);
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return 0;
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}
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if (!path_is_absolute(rvalue)) {
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log_error("[%s:%u] Not an absolute path, ignoring: %s", filename, line, rvalue);
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return 0;
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}
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n = strdup(rvalue);
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if (!n)
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return -ENOMEM;
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path_kill_slashes(n);
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|
|
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;
|
|
char **n;
|
|
char *w;
|
|
unsigned k;
|
|
size_t l;
|
|
char *state;
|
|
int r;
|
|
|
|
assert(filename);
|
|
assert(lvalue);
|
|
assert(rvalue);
|
|
assert(data);
|
|
|
|
k = strv_length(*sv);
|
|
FOREACH_WORD_QUOTED(w, l, rvalue, state)
|
|
k++;
|
|
|
|
n = new(char*, k+1);
|
|
if (!n)
|
|
return -ENOMEM;
|
|
|
|
if (*sv)
|
|
for (k = 0; (*sv)[k]; k++)
|
|
n[k] = (*sv)[k];
|
|
else
|
|
k = 0;
|
|
|
|
FOREACH_WORD_QUOTED(w, l, rvalue, state) {
|
|
n[k] = cunescape_length(w, l);
|
|
if (!n[k]) {
|
|
r = -ENOMEM;
|
|
goto fail;
|
|
}
|
|
|
|
if (!utf8_is_valid(n[k])) {
|
|
log_error("[%s:%u] String is not UTF-8 clean, ignoring assignment: %s", filename, line, rvalue);
|
|
free(n[k]);
|
|
continue;
|
|
}
|
|
|
|
k++;
|
|
}
|
|
|
|
n[k] = NULL;
|
|
free(*sv);
|
|
*sv = n;
|
|
|
|
return 0;
|
|
|
|
fail:
|
|
for (; k > 0; k--)
|
|
free(n[k-1]);
|
|
free(n);
|
|
|
|
return r;
|
|
}
|
|
|
|
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;
|
|
char **n;
|
|
char *w;
|
|
unsigned k;
|
|
size_t l;
|
|
char *state;
|
|
int r;
|
|
|
|
assert(filename);
|
|
assert(lvalue);
|
|
assert(rvalue);
|
|
assert(data);
|
|
|
|
k = strv_length(*sv);
|
|
FOREACH_WORD_QUOTED(w, l, rvalue, state)
|
|
k++;
|
|
|
|
n = new(char*, k+1);
|
|
if (!n)
|
|
return -ENOMEM;
|
|
|
|
k = 0;
|
|
if (*sv)
|
|
for (; (*sv)[k]; k++)
|
|
n[k] = (*sv)[k];
|
|
|
|
FOREACH_WORD_QUOTED(w, l, rvalue, state) {
|
|
n[k] = strndup(w, l);
|
|
if (!n[k]) {
|
|
r = -ENOMEM;
|
|
goto fail;
|
|
}
|
|
|
|
if (!utf8_is_valid(n[k])) {
|
|
log_error("[%s:%u] Path is not UTF-8 clean, ignoring assignment: %s", filename, line, rvalue);
|
|
free(n[k]);
|
|
continue;
|
|
}
|
|
|
|
if (!path_is_absolute(n[k])) {
|
|
log_error("[%s:%u] Not an absolute path, ignoring: %s", filename, line, rvalue);
|
|
free(n[k]);
|
|
continue;
|
|
}
|
|
|
|
path_kill_slashes(n[k]);
|
|
k++;
|
|
}
|
|
|
|
n[k] = NULL;
|
|
free(*sv);
|
|
*sv = n;
|
|
|
|
return 0;
|
|
|
|
fail:
|
|
for (; k > 0; k--)
|
|
free(n[k-1]);
|
|
free(n);
|
|
|
|
return r;
|
|
}
|
|
|
|
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);
|
|
|
|
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;
|
|
}
|