mirror of
https://github.com/AuxXxilium/eudev.git
synced 2024-12-22 23:36:40 +07:00
397 lines
9.7 KiB
C
397 lines
9.7 KiB
C
/*-*- Mode: C; c-basic-offset: 8 -*-*/
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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 General Public License as published by
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the Free Software Foundation; either version 2 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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General Public License for more details.
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You should have received a copy of the GNU 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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#define COMMENTS "#;\n"
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#define LINE_MAX 4096
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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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const char *section,
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const ConfigItem *t,
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const char *lvalue,
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const char *rvalue,
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void *userdata) {
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assert(filename);
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assert(t);
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assert(lvalue);
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assert(rvalue);
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for (; t->parse; t++) {
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if (t->lvalue && !streq(lvalue, t->lvalue))
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continue;
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if (t->section && !section)
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continue;
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if (t->section && !streq(section, t->section))
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continue;
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return t->parse(filename, line, section, lvalue, rvalue, t->data, userdata);
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}
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/* Warn about unknown non-extension fields. */
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if (!startswith(lvalue, "X-"))
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log_info("[%s:%u] Unknown lvalue '%s' in section '%s'. Ignoring.", filename, line, lvalue, strna(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 *filename, unsigned line, char **section, const char* const * sections, const ConfigItem *t, char *l, void *userdata) {
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char *e;
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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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if (!(fn = file_in_same_dir(filename, strstrip(l+9))))
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return -ENOMEM;
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r = config_parse(fn, NULL, sections, t, 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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if (!(n = strndup(l+1, k-2)))
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return -ENOMEM;
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if (sections && !strv_contains((char**) sections, n)) {
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log_error("[%s:%u] Unknown section '%s'.", filename, line, n);
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free(n);
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return -EBADMSG;
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}
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free(*section);
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*section = n;
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return 0;
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}
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if (!(e = strchr(l, '='))) {
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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(filename, line, *section, t, strstrip(l), strstrip(e), 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 *filename, FILE *f, const char* const * sections, const ConfigItem *t, 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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assert(filename);
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assert(t);
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if (!f) {
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if (!(f = fopen(filename, "re"))) {
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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];
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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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if ((r = parse_line(filename, ++line, §ion, sections, t, l, userdata)) < 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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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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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: %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_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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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_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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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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unsigned u;
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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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*sz = (size_t) u;
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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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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: %s", filename, line, rvalue);
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return k;
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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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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 (*rvalue) {
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if (!(n = strdup(rvalue)))
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return -ENOMEM;
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} else
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n = NULL;
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free(*s);
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*s = n;
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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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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 (*rvalue != '/') {
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log_error("[%s:%u] Not an absolute path: %s", filename, line, rvalue);
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return -EINVAL;
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}
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if (!(n = strdup(rvalue)))
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return -ENOMEM;
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free(*s);
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*s = n;
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return 0;
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}
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int config_parse_strv(
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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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const char *rvalue,
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void *data,
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void *userdata) {
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char*** sv = data;
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char **n;
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char *w;
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unsigned k;
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size_t l;
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char *state;
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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 = strv_length(*sv);
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FOREACH_WORD_QUOTED(w, l, rvalue, state)
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k++;
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if (!(n = new(char*, k+1)))
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return -ENOMEM;
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if (*sv)
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for (k = 0; (*sv)[k]; k++)
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n[k] = (*sv)[k];
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else
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k = 0;
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FOREACH_WORD_QUOTED(w, l, rvalue, state)
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if (!(n[k++] = strndup(w, l)))
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goto fail;
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n[k] = NULL;
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free(*sv);
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*sv = n;
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return 0;
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fail:
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for (; k > 0; k--)
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free(n[k-1]);
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free(n);
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return -ENOMEM;
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}
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