mirror of
https://github.com/systemd/systemd.git
synced 2024-11-05 06:52:22 +03:00
393 lines
9.5 KiB
C
393 lines
9.5 KiB
C
/*-*- Mode: C; c-basic-offset: 8 -*-*/
|
|
|
|
/***
|
|
This file is part of systemd.
|
|
|
|
Copyright 2010 Lennart Poettering
|
|
|
|
systemd is free software; you can redistribute it and/or modify it
|
|
under the terms of the GNU General Public License as published by
|
|
the Free Software Foundation; either version 2 of the License, or
|
|
(at your option) any later version.
|
|
|
|
systemd is distributed in the hope that it will be useful, but
|
|
WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
General Public License for more details.
|
|
|
|
You should have received a copy of the GNU General Public License
|
|
along with systemd; If not, see <http://www.gnu.org/licenses/>.
|
|
***/
|
|
|
|
#include <string.h>
|
|
#include <stdio.h>
|
|
#include <errno.h>
|
|
#include <assert.h>
|
|
#include <stdlib.h>
|
|
|
|
#include "conf-parser.h"
|
|
#include "util.h"
|
|
#include "macro.h"
|
|
#include "strv.h"
|
|
#include "log.h"
|
|
|
|
#define COMMENTS "#;\n"
|
|
#define LINE_MAX 4096
|
|
|
|
/* Run the user supplied parser for an assignment */
|
|
static int next_assignment(
|
|
const char *filename,
|
|
unsigned line,
|
|
const char *section,
|
|
const ConfigItem *t,
|
|
const char *lvalue,
|
|
const char *rvalue,
|
|
void *userdata) {
|
|
|
|
assert(filename);
|
|
assert(t);
|
|
assert(lvalue);
|
|
assert(rvalue);
|
|
|
|
for (; t->parse; t++) {
|
|
|
|
if (t->lvalue && !streq(lvalue, t->lvalue))
|
|
continue;
|
|
|
|
if (t->section && !section)
|
|
continue;
|
|
|
|
if (t->section && !streq(section, t->section))
|
|
continue;
|
|
|
|
return t->parse(filename, line, section, lvalue, rvalue, t->data, userdata);
|
|
}
|
|
|
|
log_info("[%s:%u] Unknown lvalue '%s' in section '%s'. Ignoring.", filename, line, lvalue, strna(section));
|
|
return 0;
|
|
}
|
|
|
|
/* Parse a variable assignment line */
|
|
static int parse_line(const char *filename, unsigned line, char **section, const char* const * sections, const ConfigItem *t, char *l, void *userdata) {
|
|
char *e;
|
|
|
|
l = strstrip(l);
|
|
|
|
if (!*l)
|
|
return 0;
|
|
|
|
if (strchr(COMMENTS, *l))
|
|
return 0;
|
|
|
|
if (startswith(l, ".include ")) {
|
|
char *fn;
|
|
int r;
|
|
|
|
if (!(fn = file_in_same_dir(filename, strstrip(l+9))))
|
|
return -ENOMEM;
|
|
|
|
r = config_parse(fn, NULL, sections, t, userdata);
|
|
free(fn);
|
|
|
|
return r;
|
|
}
|
|
|
|
if (*l == '[') {
|
|
size_t k;
|
|
char *n;
|
|
|
|
k = strlen(l);
|
|
assert(k > 0);
|
|
|
|
if (l[k-1] != ']') {
|
|
log_error("[%s:%u] Invalid section header.", filename, line);
|
|
return -EBADMSG;
|
|
}
|
|
|
|
if (!(n = strndup(l+1, k-2)))
|
|
return -ENOMEM;
|
|
|
|
if (sections && !strv_contains((char**) sections, n)) {
|
|
free(n);
|
|
return -EBADMSG;
|
|
}
|
|
|
|
free(*section);
|
|
*section = n;
|
|
|
|
return 0;
|
|
}
|
|
|
|
if (!(e = strchr(l, '='))) {
|
|
log_error("[%s:%u] Missing '='.", filename, line);
|
|
return -EBADMSG;
|
|
}
|
|
|
|
*e = 0;
|
|
e++;
|
|
|
|
return next_assignment(filename, line, *section, t, strstrip(l), strstrip(e), userdata);
|
|
}
|
|
|
|
/* Go through the file and parse each line */
|
|
int config_parse(const char *filename, FILE *f, const char* const * sections, const ConfigItem *t, void *userdata) {
|
|
unsigned line = 0;
|
|
char *section = NULL;
|
|
int r;
|
|
bool ours = false;
|
|
|
|
assert(filename);
|
|
assert(t);
|
|
|
|
if (!f) {
|
|
if (!(f = fopen(filename, "re"))) {
|
|
r = -errno;
|
|
log_error("Failed to open configuration file '%s': %s", filename, strerror(-r));
|
|
goto finish;
|
|
}
|
|
|
|
ours = true;
|
|
}
|
|
|
|
while (!feof(f)) {
|
|
char l[LINE_MAX];
|
|
|
|
if (!fgets(l, sizeof(l), f)) {
|
|
if (feof(f))
|
|
break;
|
|
|
|
r = -errno;
|
|
log_error("Failed to read configuration file '%s': %s", filename, strerror(-r));
|
|
goto finish;
|
|
}
|
|
|
|
if ((r = parse_line(filename, ++line, §ion, sections, t, l, userdata)) < 0)
|
|
goto finish;
|
|
}
|
|
|
|
r = 0;
|
|
|
|
finish:
|
|
free(section);
|
|
|
|
if (f && ours)
|
|
fclose(f);
|
|
|
|
return r;
|
|
}
|
|
|
|
int config_parse_int(
|
|
const char *filename,
|
|
unsigned line,
|
|
const char *section,
|
|
const char *lvalue,
|
|
const char *rvalue,
|
|
void *data,
|
|
void *userdata) {
|
|
|
|
int *i = data;
|
|
int r;
|
|
|
|
assert(filename);
|
|
assert(lvalue);
|
|
assert(rvalue);
|
|
assert(data);
|
|
|
|
if ((r = safe_atoi(rvalue, i)) < 0) {
|
|
log_error("[%s:%u] Failed to parse numeric value: %s", filename, line, rvalue);
|
|
return r;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
int config_parse_unsigned(
|
|
const char *filename,
|
|
unsigned line,
|
|
const char *section,
|
|
const char *lvalue,
|
|
const char *rvalue,
|
|
void *data,
|
|
void *userdata) {
|
|
|
|
unsigned *u = data;
|
|
int r;
|
|
|
|
assert(filename);
|
|
assert(lvalue);
|
|
assert(rvalue);
|
|
assert(data);
|
|
|
|
if ((r = safe_atou(rvalue, u)) < 0) {
|
|
log_error("[%s:%u] Failed to parse numeric value: %s", filename, line, rvalue);
|
|
return r;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
int config_parse_size(
|
|
const char *filename,
|
|
unsigned line,
|
|
const char *section,
|
|
const char *lvalue,
|
|
const char *rvalue,
|
|
void *data,
|
|
void *userdata) {
|
|
|
|
size_t *sz = data;
|
|
unsigned u;
|
|
int r;
|
|
|
|
assert(filename);
|
|
assert(lvalue);
|
|
assert(rvalue);
|
|
assert(data);
|
|
|
|
if ((r = safe_atou(rvalue, &u)) < 0) {
|
|
log_error("[%s:%u] Failed to parse numeric value: %s", filename, line, rvalue);
|
|
return r;
|
|
}
|
|
|
|
*sz = (size_t) u;
|
|
return 0;
|
|
}
|
|
|
|
int config_parse_bool(
|
|
const char *filename,
|
|
unsigned line,
|
|
const char *section,
|
|
const char *lvalue,
|
|
const char *rvalue,
|
|
void *data,
|
|
void *userdata) {
|
|
|
|
int k;
|
|
bool *b = data;
|
|
|
|
assert(filename);
|
|
assert(lvalue);
|
|
assert(rvalue);
|
|
assert(data);
|
|
|
|
if ((k = parse_boolean(rvalue)) < 0) {
|
|
log_error("[%s:%u] Failed to parse boolean value: %s", filename, line, rvalue);
|
|
return k;
|
|
}
|
|
|
|
*b = !!k;
|
|
return 0;
|
|
}
|
|
|
|
int config_parse_string(
|
|
const char *filename,
|
|
unsigned line,
|
|
const char *section,
|
|
const char *lvalue,
|
|
const char *rvalue,
|
|
void *data,
|
|
void *userdata) {
|
|
|
|
char **s = data;
|
|
char *n;
|
|
|
|
assert(filename);
|
|
assert(lvalue);
|
|
assert(rvalue);
|
|
assert(data);
|
|
|
|
if (*rvalue) {
|
|
if (!(n = strdup(rvalue)))
|
|
return -ENOMEM;
|
|
} else
|
|
n = NULL;
|
|
|
|
free(*s);
|
|
*s = n;
|
|
|
|
return 0;
|
|
}
|
|
|
|
int config_parse_path(
|
|
const char *filename,
|
|
unsigned line,
|
|
const char *section,
|
|
const char *lvalue,
|
|
const char *rvalue,
|
|
void *data,
|
|
void *userdata) {
|
|
|
|
char **s = data;
|
|
char *n;
|
|
|
|
assert(filename);
|
|
assert(lvalue);
|
|
assert(rvalue);
|
|
assert(data);
|
|
|
|
if (*rvalue != '/') {
|
|
log_error("[%s:%u] Not an absolute path: %s", filename, line, rvalue);
|
|
return -EINVAL;
|
|
}
|
|
|
|
if (!(n = strdup(rvalue)))
|
|
return -ENOMEM;
|
|
|
|
free(*s);
|
|
*s = n;
|
|
|
|
return 0;
|
|
}
|
|
|
|
int config_parse_strv(
|
|
const char *filename,
|
|
unsigned line,
|
|
const char *section,
|
|
const char *lvalue,
|
|
const char *rvalue,
|
|
void *data,
|
|
void *userdata) {
|
|
|
|
char*** sv = data;
|
|
char **n;
|
|
char *w;
|
|
unsigned k;
|
|
size_t l;
|
|
char *state;
|
|
|
|
assert(filename);
|
|
assert(lvalue);
|
|
assert(rvalue);
|
|
assert(data);
|
|
|
|
k = strv_length(*sv);
|
|
FOREACH_WORD_QUOTED(w, l, rvalue, state)
|
|
k++;
|
|
|
|
if (!(n = new(char*, k+1)))
|
|
return -ENOMEM;
|
|
|
|
if (*sv)
|
|
for (k = 0; (*sv)[k]; k++)
|
|
n[k] = (*sv)[k];
|
|
else
|
|
k = 0;
|
|
|
|
FOREACH_WORD_QUOTED(w, l, rvalue, state)
|
|
if (!(n[k++] = strndup(w, l)))
|
|
goto fail;
|
|
|
|
n[k] = NULL;
|
|
free(*sv);
|
|
*sv = n;
|
|
|
|
return 0;
|
|
|
|
fail:
|
|
for (; k > 0; k--)
|
|
free(n[k-1]);
|
|
free(n);
|
|
|
|
return -ENOMEM;
|
|
}
|