-/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
-
+/* SPDX-License-Identifier: LGPL-2.1+ */
/***
- 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 Lesser General Public License as published by
- the Free Software Foundation; either version 2.1 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
- Lesser General Public License for more details.
-
- You should have received a copy of the GNU Lesser General Public License
- along with systemd; If not, see <http://www.gnu.org/licenses/>.
***/
+#include <errno.h>
+#include <stdarg.h>
+#include <stdbool.h>
+#include <stddef.h>
+#include <stdint.h>
+#include <stdlib.h>
+#include <string.h>
+#include <syslog.h>
+
#include "alloc-util.h"
#include "escape.h"
#include "extract-word.h"
+#include "log.h"
+#include "macro.h"
#include "string-util.h"
#include "utf8.h"
-#include "util.h"
int extract_first_word(const char **p, char **ret, const char *separators, ExtractFlags flags) {
_cleanup_free_ char *s = NULL;
/* Bail early if called after last value or with no input */
if (!*p)
- goto finish_force_terminate;
+ goto finish;
c = **p;
if (!separators)
if (!GREEDY_REALLOC(s, allocated, sz+1))
return -ENOMEM;
- for (;; (*p) ++, c = **p) {
+ for (;; (*p)++, c = **p) {
if (c == 0)
goto finish_force_terminate;
else if (strchr(separators, c)) {
if (flags & EXTRACT_DONT_COALESCE_SEPARATORS) {
- (*p) ++;
+ (*p)++;
goto finish_force_next;
}
} else {
}
}
- for (;; (*p) ++, c = **p) {
+ for (;; (*p)++, c = **p) {
if (backslash) {
if (!GREEDY_REALLOC(s, allocated, sz+7))
return -ENOMEM;
}
if (flags & EXTRACT_CUNESCAPE) {
- uint32_t u;
+ bool eight_bit = false;
+ char32_t u;
- r = cunescape_one(*p, (size_t) -1, &c, &u);
+ r = cunescape_one(*p, (size_t) -1, &u, &eight_bit);
if (r < 0) {
if (flags & EXTRACT_CUNESCAPE_RELAX) {
s[sz++] = '\\';
} else {
(*p) += r - 1;
- if (c != 0)
- s[sz++] = c; /* normal explicit char */
+ if (eight_bit)
+ s[sz++] = u;
else
- sz += utf8_encode_unichar(s + sz, u); /* unicode chars we'll encode as utf8 */
+ sz += utf8_encode_unichar(s + sz, u);
}
} else
s[sz++] = c;
backslash = false;
} else if (quote) { /* inside either single or double quotes */
- for (;; (*p) ++, c = **p) {
+ for (;; (*p)++, c = **p) {
if (c == 0) {
if (flags & EXTRACT_RELAX)
goto finish_force_terminate;
}
} else {
- for (;; (*p) ++, c = **p) {
+ for (;; (*p)++, c = **p) {
if (c == 0)
goto finish_force_terminate;
- else if ((c == '\'' || c == '"') && (flags & EXTRACT_QUOTES)) {
+ else if (IN_SET(c, '\'', '"') && (flags & EXTRACT_QUOTES)) {
quote = c;
break;
} else if (c == '\\' && !(flags & EXTRACT_RETAIN_ESCAPE)) {
break;
} else if (strchr(separators, c)) {
if (flags & EXTRACT_DONT_COALESCE_SEPARATORS) {
- (*p) ++;
+ (*p)++;
goto finish_force_next;
}
/* Skip additional coalesced separators. */
- for (;; (*p) ++, c = **p) {
+ for (;; (*p)++, c = **p) {
if (c == 0)
goto finish_force_terminate;
if (!strchr(separators, c))
finish_force_next:
s[sz] = 0;
- *ret = s;
- s = NULL;
+ *ret = TAKE_PTR(s);
return 1;
}
*p = save;
r = extract_first_word(p, ret, separators, flags|EXTRACT_CUNESCAPE_RELAX);
if (r >= 0) {
- /* It worked this time, hence it must have been an invalid escape sequence we could correct. */
- log_syntax(unit, LOG_WARNING, filename, line, EINVAL, "Invalid escape sequences in line, correcting: \"%s\"", rvalue);
+ /* It worked this time, hence it must have been an invalid escape sequence. */
+ log_syntax(unit, LOG_WARNING, filename, line, EINVAL, "Ignoring unknown escape sequences: \"%s\"", *ret);
return r;
}
return log_syntax(unit, LOG_ERR, filename, line, r, "Unable to decode word \"%s\", ignoring: %m", rvalue);
}
-int extract_many_words(const char **p, const char *separators, ExtractFlags flags, ...) {
+/* We pass ExtractFlags as unsigned int (to avoid undefined behaviour when passing
+ * an object that undergoes default argument promotion as an argument to va_start).
+ * Let's make sure that ExtractFlags fits into an unsigned int. */
+assert_cc(sizeof(enum ExtractFlags) <= sizeof(unsigned));
+
+int extract_many_words(const char **p, const char *separators, unsigned flags, ...) {
va_list ap;
char **l;
int n = 0, i, c, r;
~ianmdlvl / elogind.git / blobdiff