e8e581bf25
The information about the unit for which files are being parsed is passed all the way down. This way messages land in the journal with proper UNIT=... or USER_UNIT=... attribution. 'systemctl status' and 'journalctl -u' not displaying those messages has been a source of confusion for users, since the journal entry for a misspelt setting was often logged quite a bit earlier than the failure to start a unit. Based-on-a-patch-by: Oleksii Shevchuk <alxchk@gmail.com>
912 lines
28 KiB
C
912 lines
28 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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#include "sd-messages.h"
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int log_syntax_internal(const char *unit, int level,
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const char *file, unsigned line, const char *func,
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const char *config_file, unsigned config_line,
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int error, const char *format, ...) {
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_cleanup_free_ char *msg = NULL;
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int r;
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va_list ap;
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va_start(ap, format);
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r = vasprintf(&msg, format, ap);
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va_end(ap);
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if (r < 0)
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return log_oom();
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if (unit)
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r = log_struct_internal(level,
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file, line, func,
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getpid() == 1 ? "UNIT=%s" : "USER_UNIT=%s", unit,
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MESSAGE_ID(SD_MESSAGE_CONFIG_ERROR),
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"CONFIG_FILE=%s", config_file,
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"CONFIG_LINE=%u", config_line,
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"ERRNO=%d", error > 0 ? error : EINVAL,
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"MESSAGE=[%s:%u] %s", config_file, config_line, msg,
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NULL);
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else
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r = log_struct_internal(level,
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file, line, func,
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MESSAGE_ID(SD_MESSAGE_CONFIG_ERROR),
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"CONFIG_FILE=%s", config_file,
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"CONFIG_LINE=%u", config_line,
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"ERRNO=%d", error > 0 ? error : EINVAL,
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"MESSAGE=[%s:%u] %s", config_file, config_line, msg,
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NULL);
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log_info("logged here: '%s': %d", msg, r);
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return r;
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}
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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(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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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(unit, filename, line, section, lvalue, ltype,
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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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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 "\n", *l))
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return 0;
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if (startswith(l, ".include ")) {
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char _cleanup_free_ *fn;
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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, 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)
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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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*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_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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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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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 _cleanup_free_ *section = NULL, *continuation = NULL;
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FILE _cleanup_fclose_ *ours = NULL;
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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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log_error("Failed to open configuration file '%s': %m", filename);
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return -errno;
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}
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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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log_error("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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return -ENOMEM;
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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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return -ENOMEM;
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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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§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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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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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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#vartype, 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(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_bytes_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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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_bytes(rvalue, &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,
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"Failed to parse byte 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_bytes_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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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_bytes(rvalue, bytes);
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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 bytes 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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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_tristate(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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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_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(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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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 log_oom();
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if (!utf8_is_valid(n)) {
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log_syntax(unit, LOG_ERR, filename, line, EINVAL,
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"String is not UTF-8 clean, ignoring assignment: %s", 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(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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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_syntax(unit, LOG_ERR, filename, line, EINVAL,
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"Path is not UTF-8 clean, ignoring assignment: %s", 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_syntax(unit, LOG_ERR, filename, line, EINVAL,
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"Not an absolute path, ignoring: %s", rvalue);
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return 0;
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}
|
|
|
|
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,
|
|
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_syntax(unit, LOG_ERR, filename, line, EINVAL,
|
|
"String is not UTF-8 clean, ignoring: %s", rvalue);
|
|
continue;
|
|
}
|
|
|
|
r = strv_extend(sv, n);
|
|
if (r < 0)
|
|
return log_oom();
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
int config_parse_path_strv(const char *unit,
|
|
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_syntax(unit, LOG_ERR, filename, line, EINVAL,
|
|
"Path is not UTF-8 clean, ignoring assignment: %s", rvalue);
|
|
continue;
|
|
}
|
|
|
|
if (!path_is_absolute(n)) {
|
|
log_syntax(unit, LOG_ERR, filename, line, EINVAL,
|
|
"Not an absolute path, ignoring: %s", rvalue);
|
|
continue;
|
|
}
|
|
|
|
path_kill_slashes(n);
|
|
r = strv_extend(sv, n);
|
|
if (r < 0)
|
|
return log_oom();
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
int config_parse_mode(const char *unit,
|
|
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_syntax(unit, LOG_ERR, filename, line, errno,
|
|
"Failed to parse mode value, ignoring: %s", rvalue);
|
|
return 0;
|
|
}
|
|
|
|
if (l < 0000 || l > 07777) {
|
|
log_syntax(unit, LOG_ERR, filename, line, ERANGE,
|
|
"Mode value out of range, ignoring: %s", rvalue);
|
|
return 0;
|
|
}
|
|
|
|
*m = (mode_t) l;
|
|
return 0;
|
|
}
|
|
|
|
int config_parse_facility(const char *unit,
|
|
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_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_level(const char *unit,
|
|
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_syntax(unit, LOG_ERR, filename, line, EINVAL,
|
|
"Failed to parse log level, ignoring: %s", rvalue);
|
|
return 0;
|
|
}
|
|
|
|
*o = (*o & LOG_FACMASK) | x;
|
|
return 0;
|
|
}
|
|
|
|
int config_parse_set_status(const char *unit,
|
|
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_syntax(unit, LOG_ERR, filename, line, -r,
|
|
"Unable to store: %s", w);
|
|
return r;
|
|
}
|
|
} else {
|
|
log_syntax(unit, LOG_ERR, filename, line, -val,
|
|
"Failed to parse value, ignoring: %s", w);
|
|
return 0;
|
|
}
|
|
} else {
|
|
free(temp);
|
|
|
|
if (val < 0 || val > 255)
|
|
log_syntax(unit, LOG_ERR, filename, line, ERANGE,
|
|
"Value %d is outside range 0-255, ignoring", 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_syntax(unit, LOG_ERR, filename, line, -r,
|
|
"Unable to store: %s", w);
|
|
return r;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|