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-rw-r--r--src/shared/conf-parser.c852
1 files changed, 852 insertions, 0 deletions
diff --git a/src/shared/conf-parser.c b/src/shared/conf-parser.c
new file mode 100644
index 0000000000..a9b01135e6
--- /dev/null
+++ b/src/shared/conf-parser.c
@@ -0,0 +1,852 @@
+/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
+
+/***
+ 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"
+#include "utf8.h"
+
+int config_item_table_lookup(
+ void *table,
+ const char *section,
+ const char *lvalue,
+ ConfigParserCallback *func,
+ int *ltype,
+ void **data,
+ void *userdata) {
+
+ ConfigTableItem *t;
+
+ assert(table);
+ assert(lvalue);
+ assert(func);
+ assert(ltype);
+ assert(data);
+
+ for (t = table; t->lvalue; t++) {
+
+ if (!streq(lvalue, t->lvalue))
+ continue;
+
+ if (!streq_ptr(section, t->section))
+ continue;
+
+ *func = t->parse;
+ *ltype = t->ltype;
+ *data = t->data;
+ return 1;
+ }
+
+ return 0;
+}
+
+int config_item_perf_lookup(
+ void *table,
+ const char *section,
+ const char *lvalue,
+ ConfigParserCallback *func,
+ int *ltype,
+ void **data,
+ void *userdata) {
+
+ ConfigPerfItemLookup lookup = (ConfigPerfItemLookup) table;
+ const ConfigPerfItem *p;
+
+ assert(table);
+ assert(lvalue);
+ assert(func);
+ assert(ltype);
+ assert(data);
+
+ if (!section)
+ p = lookup(lvalue, strlen(lvalue));
+ else {
+ char *key;
+
+ key = join(section, ".", lvalue, NULL);
+ if (!key)
+ return -ENOMEM;
+
+ p = lookup(key, strlen(key));
+ free(key);
+ }
+
+ if (!p)
+ return 0;
+
+ *func = p->parse;
+ *ltype = p->ltype;
+ *data = (uint8_t*) userdata + p->offset;
+ return 1;
+}
+
+/* Run the user supplied parser for an assignment */
+static int next_assignment(
+ const char *filename,
+ unsigned line,
+ ConfigItemLookup lookup,
+ void *table,
+ const char *section,
+ const char *lvalue,
+ const char *rvalue,
+ bool relaxed,
+ void *userdata) {
+
+ ConfigParserCallback func = NULL;
+ int ltype = 0;
+ void *data = NULL;
+ int r;
+
+ assert(filename);
+ assert(line > 0);
+ assert(lookup);
+ assert(lvalue);
+ assert(rvalue);
+
+ r = lookup(table, section, lvalue, &func, &ltype, &data, userdata);
+ if (r < 0)
+ return r;
+
+ if (r > 0) {
+ if (func)
+ return func(filename, line, section, lvalue, ltype, rvalue, data, userdata);
+
+ return 0;
+ }
+
+ /* Warn about unknown non-extension fields. */
+ if (!relaxed && !startswith(lvalue, "X-"))
+ log_info("[%s:%u] Unknown lvalue '%s' in section '%s'. Ignoring.", filename, line, lvalue, section);
+
+ return 0;
+}
+
+/* Parse a variable assignment line */
+static int parse_line(
+ const char *filename,
+ unsigned line,
+ const char *sections,
+ ConfigItemLookup lookup,
+ void *table,
+ bool relaxed,
+ char **section,
+ char *l,
+ void *userdata) {
+
+ char *e;
+
+ assert(filename);
+ assert(line > 0);
+ assert(lookup);
+ assert(l);
+
+ l = strstrip(l);
+
+ if (!*l)
+ return 0;
+
+ if (strchr(COMMENTS, *l))
+ return 0;
+
+ if (startswith(l, ".include ")) {
+ char *fn;
+ int r;
+
+ fn = file_in_same_dir(filename, strstrip(l+9));
+ if (!fn)
+ return -ENOMEM;
+
+ r = config_parse(fn, NULL, sections, lookup, table, relaxed, 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;
+ }
+
+ n = strndup(l+1, k-2);
+ if (!n)
+ return -ENOMEM;
+
+ if (sections && !nulstr_contains(sections, n)) {
+
+ if (!relaxed)
+ log_info("[%s:%u] Unknown section '%s'. Ignoring.", filename, line, n);
+
+ free(n);
+ *section = NULL;
+ } else {
+ free(*section);
+ *section = n;
+ }
+
+ return 0;
+ }
+
+ if (sections && !*section) {
+
+ if (!relaxed)
+ log_info("[%s:%u] Assignment outside of section. Ignoring.", filename, line);
+
+ return 0;
+ }
+
+ e = strchr(l, '=');
+ if (!e) {
+ log_error("[%s:%u] Missing '='.", filename, line);
+ return -EBADMSG;
+ }
+
+ *e = 0;
+ e++;
+
+ return next_assignment(
+ filename,
+ line,
+ lookup,
+ table,
+ *section,
+ strstrip(l),
+ strstrip(e),
+ relaxed,
+ userdata);
+}
+
+/* Go through the file and parse each line */
+int config_parse(
+ const char *filename,
+ FILE *f,
+ const char *sections,
+ ConfigItemLookup lookup,
+ void *table,
+ bool relaxed,
+ void *userdata) {
+
+ unsigned line = 0;
+ char *section = NULL;
+ int r;
+ bool ours = false;
+ char *continuation = NULL;
+
+ assert(filename);
+ assert(lookup);
+
+ if (!f) {
+ f = fopen(filename, "re");
+ if (!f) {
+ 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], *p, *c = NULL, *e;
+ bool escaped = false;
+
+ 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;
+ }
+
+ truncate_nl(l);
+
+ if (continuation) {
+ c = strappend(continuation, l);
+ if (!c) {
+ r = -ENOMEM;
+ goto finish;
+ }
+
+ free(continuation);
+ continuation = NULL;
+ p = c;
+ } else
+ p = l;
+
+ for (e = p; *e; e++) {
+ if (escaped)
+ escaped = false;
+ else if (*e == '\\')
+ escaped = true;
+ }
+
+ if (escaped) {
+ *(e-1) = ' ';
+
+ if (c)
+ continuation = c;
+ else {
+ continuation = strdup(l);
+ if (!continuation) {
+ r = -ENOMEM;
+ goto finish;
+ }
+ }
+
+ continue;
+ }
+
+ r = parse_line(filename,
+ ++line,
+ sections,
+ lookup,
+ table,
+ relaxed,
+ &section,
+ p,
+ userdata);
+ free(c);
+
+ if (r < 0)
+ goto finish;
+ }
+
+ r = 0;
+
+finish:
+ free(section);
+ free(continuation);
+
+ if (f && ours)
+ fclose(f);
+
+ return r;
+}
+
+int config_parse_int(
+ const char *filename,
+ unsigned line,
+ const char *section,
+ const char *lvalue,
+ int ltype,
+ 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, ingoring: %s", filename, line, rvalue);
+ return 0;
+ }
+
+ return 0;
+}
+
+int config_parse_long(
+ const char *filename,
+ unsigned line,
+ const char *section,
+ const char *lvalue,
+ int ltype,
+ const char *rvalue,
+ void *data,
+ void *userdata) {
+
+ long *i = data;
+ int r;
+
+ assert(filename);
+ assert(lvalue);
+ assert(rvalue);
+ assert(data);
+
+ if ((r = safe_atoli(rvalue, i)) < 0) {
+ log_error("[%s:%u] Failed to parse numeric value, ignoring: %s", filename, line, rvalue);
+ return 0;
+ }
+
+ return 0;
+}
+
+int config_parse_uint64(
+ const char *filename,
+ unsigned line,
+ const char *section,
+ const char *lvalue,
+ int ltype,
+ const char *rvalue,
+ void *data,
+ void *userdata) {
+
+ uint64_t *u = data;
+ int r;
+
+ assert(filename);
+ assert(lvalue);
+ assert(rvalue);
+ assert(data);
+
+ if ((r = safe_atou64(rvalue, u)) < 0) {
+ log_error("[%s:%u] Failed to parse numeric value, ignoring: %s", filename, line, rvalue);
+ return 0;
+ }
+
+ return 0;
+}
+
+int config_parse_unsigned(
+ const char *filename,
+ unsigned line,
+ const char *section,
+ const char *lvalue,
+ int ltype,
+ 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_bytes_size(
+ const char *filename,
+ unsigned line,
+ const char *section,
+ const char *lvalue,
+ int ltype,
+ const char *rvalue,
+ void *data,
+ void *userdata) {
+
+ size_t *sz = data;
+ off_t o;
+
+ assert(filename);
+ assert(lvalue);
+ assert(rvalue);
+ assert(data);
+
+ if (parse_bytes(rvalue, &o) < 0 || (off_t) (size_t) o != o) {
+ log_error("[%s:%u] Failed to parse byte value, ignoring: %s", filename, line, rvalue);
+ return 0;
+ }
+
+ *sz = (size_t) o;
+ return 0;
+}
+
+
+int config_parse_bytes_off(
+ const char *filename,
+ unsigned line,
+ const char *section,
+ const char *lvalue,
+ int ltype,
+ const char *rvalue,
+ void *data,
+ void *userdata) {
+
+ off_t *bytes = data;
+
+ assert(filename);
+ assert(lvalue);
+ assert(rvalue);
+ assert(data);
+
+ assert_cc(sizeof(off_t) == sizeof(uint64_t));
+
+ if (parse_bytes(rvalue, bytes) < 0) {
+ log_error("[%s:%u] Failed to parse bytes value, ignoring: %s", filename, line, rvalue);
+ return 0;
+ }
+
+ return 0;
+}
+
+int config_parse_bool(
+ const char *filename,
+ unsigned line,
+ const char *section,
+ const char *lvalue,
+ int ltype,
+ 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, ignoring: %s", filename, line, rvalue);
+ return 0;
+ }
+
+ *b = !!k;
+ return 0;
+}
+
+int config_parse_tristate(
+ const char *filename,
+ unsigned line,
+ const char *section,
+ const char *lvalue,
+ int ltype,
+ const char *rvalue,
+ void *data,
+ void *userdata) {
+
+ int k;
+ int *b = data;
+
+ assert(filename);
+ assert(lvalue);
+ assert(rvalue);
+ assert(data);
+
+ /* Tristates are like booleans, but can also take the 'default' value, i.e. "-1" */
+
+ k = parse_boolean(rvalue);
+ if (k < 0) {
+ log_error("[%s:%u] Failed to parse boolean value, ignoring: %s", filename, line, rvalue);
+ return 0;
+ }
+
+ *b = !!k;
+ return 0;
+}
+
+int config_parse_string(
+ const char *filename,
+ unsigned line,
+ const char *section,
+ const char *lvalue,
+ int ltype,
+ const char *rvalue,
+ void *data,
+ void *userdata) {
+
+ char **s = data;
+ char *n;
+
+ assert(filename);
+ assert(lvalue);
+ assert(rvalue);
+ assert(data);
+
+ n = cunescape(rvalue);
+ if (!n)
+ return -ENOMEM;
+
+ if (!utf8_is_valid(n)) {
+ log_error("[%s:%u] String is not UTF-8 clean, ignoring assignment: %s", filename, line, rvalue);
+ free(n);
+ return 0;
+ }
+
+ free(*s);
+ if (*n)
+ *s = n;
+ else {
+ free(n);
+ *s = NULL;
+ }
+
+ return 0;
+}
+
+int config_parse_path(
+ const char *filename,
+ unsigned line,
+ const char *section,
+ const char *lvalue,
+ int ltype,
+ const char *rvalue,
+ void *data,
+ void *userdata) {
+
+ char **s = data;
+ char *n;
+
+ assert(filename);
+ assert(lvalue);
+ assert(rvalue);
+ assert(data);
+
+ if (!utf8_is_valid(rvalue)) {
+ log_error("[%s:%u] Path is not UTF-8 clean, ignoring assignment: %s", filename, line, rvalue);
+ return 0;
+ }
+
+ if (!path_is_absolute(rvalue)) {
+ log_error("[%s:%u] Not an absolute path, ignoring: %s", filename, line, rvalue);
+ return 0;
+ }
+
+ n = strdup(rvalue);
+ if (!n)
+ return -ENOMEM;
+
+ path_kill_slashes(n);
+
+ 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_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 || 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;
+}
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