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-rw-r--r--src/basic/util.c251
1 files changed, 1 insertions, 250 deletions
diff --git a/src/basic/util.c b/src/basic/util.c
index 63c8abcf82..641e0b4d89 100644
--- a/src/basic/util.c
+++ b/src/basic/util.c
@@ -1587,7 +1587,7 @@ char *cescape(const char *s) {
return r;
}
-static int cunescape_one(const char *p, size_t length, char *ret, uint32_t *ret_unicode) {
+int cunescape_one(const char *p, size_t length, char *ret, uint32_t *ret_unicode) {
int r = 1;
assert(p);
@@ -5801,255 +5801,6 @@ int is_device_node(const char *path) {
return !!(S_ISBLK(info.st_mode) || S_ISCHR(info.st_mode));
}
-int extract_first_word(const char **p, char **ret, const char *separators, ExtractFlags flags) {
- _cleanup_free_ char *s = NULL;
- size_t allocated = 0, sz = 0;
- int r;
-
- char quote = 0; /* 0 or ' or " */
- bool backslash = false; /* whether we've just seen a backslash */
- bool separator = false; /* whether we've just seen a separator */
- bool start = true; /* false means we're looking at a value */
-
- assert(p);
- assert(ret);
-
- if (!separators)
- separators = WHITESPACE;
-
- /* Bail early if called after last value or with no input */
- if (!*p)
- goto finish_force_terminate;
-
- /* Parses the first word of a string, and returns it in
- * *ret. Removes all quotes in the process. When parsing fails
- * (because of an uneven number of quotes or similar), leaves
- * the pointer *p at the first invalid character. */
-
- for (;;) {
- char c = **p;
-
- if (start) {
- if (flags & EXTRACT_DONT_COALESCE_SEPARATORS)
- if (!GREEDY_REALLOC(s, allocated, sz+1))
- return -ENOMEM;
-
- if (c == 0)
- goto finish_force_terminate;
- else if (strchr(separators, c)) {
- (*p) ++;
- if (flags & EXTRACT_DONT_COALESCE_SEPARATORS)
- goto finish_force_next;
- continue;
- }
-
- /* We found a non-blank character, so we will always
- * want to return a string (even if it is empty),
- * allocate it here. */
- if (!GREEDY_REALLOC(s, allocated, sz+1))
- return -ENOMEM;
-
- start = false;
- }
-
- if (backslash) {
- if (!GREEDY_REALLOC(s, allocated, sz+7))
- return -ENOMEM;
-
- if (c == 0) {
- if ((flags & EXTRACT_CUNESCAPE_RELAX) &&
- (!quote || flags & EXTRACT_RELAX)) {
- /* If we find an unquoted trailing backslash and we're in
- * EXTRACT_CUNESCAPE_RELAX mode, keep it verbatim in the
- * output.
- *
- * Unbalanced quotes will only be allowed in EXTRACT_RELAX
- * mode, EXTRACT_CUNESCAPE_RELAX mode does not allow them.
- */
- s[sz++] = '\\';
- goto finish_force_terminate;
- }
- if (flags & EXTRACT_RELAX)
- goto finish_force_terminate;
- return -EINVAL;
- }
-
- if (flags & EXTRACT_CUNESCAPE) {
- uint32_t u;
-
- r = cunescape_one(*p, (size_t) -1, &c, &u);
- if (r < 0) {
- if (flags & EXTRACT_CUNESCAPE_RELAX) {
- s[sz++] = '\\';
- s[sz++] = c;
- goto end_escape;
- }
- return -EINVAL;
- }
-
- (*p) += r - 1;
-
- if (c != 0)
- s[sz++] = c; /* normal explicit char */
- else
- sz += utf8_encode_unichar(s + sz, u); /* unicode chars we'll encode as utf8 */
- } else
- s[sz++] = c;
-
-end_escape:
- backslash = false;
-
- } else if (quote) { /* inside either single or double quotes */
- if (c == 0) {
- if (flags & EXTRACT_RELAX)
- goto finish_force_terminate;
- return -EINVAL;
- } else if (c == quote) /* found the end quote */
- quote = 0;
- else if (c == '\\')
- backslash = true;
- else {
- if (!GREEDY_REALLOC(s, allocated, sz+2))
- return -ENOMEM;
-
- s[sz++] = c;
- }
-
- } else if (separator) {
- if (c == 0)
- goto finish_force_terminate;
- if (!strchr(separators, c))
- goto finish;
-
- } else {
- if (c == 0)
- goto finish_force_terminate;
- else if ((c == '\'' || c == '"') && (flags & EXTRACT_QUOTES))
- quote = c;
- else if (c == '\\')
- backslash = true;
- else if (strchr(separators, c)) {
- if (flags & EXTRACT_DONT_COALESCE_SEPARATORS) {
- (*p) ++;
- goto finish_force_next;
- }
- separator = true;
- } else {
- if (!GREEDY_REALLOC(s, allocated, sz+2))
- return -ENOMEM;
-
- s[sz++] = c;
- }
- }
-
- (*p) ++;
- }
-
-finish_force_terminate:
- *p = NULL;
-finish:
- if (!s) {
- *p = NULL;
- *ret = NULL;
- return 0;
- }
-
-finish_force_next:
- s[sz] = 0;
- *ret = s;
- s = NULL;
-
- return 1;
-}
-
-int extract_first_word_and_warn(
- const char **p,
- char **ret,
- const char *separators,
- ExtractFlags flags,
- const char *unit,
- const char *filename,
- unsigned line,
- const char *rvalue) {
-
- /* Try to unquote it, if it fails, warn about it and try again but this
- * time using EXTRACT_CUNESCAPE_RELAX to keep the backslashes verbatim
- * in invalid escape sequences. */
- const char *save;
- int r;
-
- save = *p;
- r = extract_first_word(p, ret, separators, flags);
- if (r < 0 && !(flags & EXTRACT_CUNESCAPE_RELAX)) {
-
- /* Retry it with EXTRACT_CUNESCAPE_RELAX. */
- *p = save;
- r = extract_first_word(p, ret, separators, flags|EXTRACT_CUNESCAPE_RELAX);
- if (r < 0)
- log_syntax(unit, LOG_ERR, filename, line, r, "Unbalanced quoting in command line, ignoring: \"%s\"", rvalue);
- else
- log_syntax(unit, LOG_WARNING, filename, line, 0, "Invalid escape sequences in command line: \"%s\"", rvalue);
- }
-
- return r;
-}
-
-int extract_many_words(const char **p, const char *separators, ExtractFlags flags, ...) {
- va_list ap;
- char **l;
- int n = 0, i, c, r;
-
- /* Parses a number of words from a string, stripping any
- * quotes if necessary. */
-
- assert(p);
-
- /* Count how many words are expected */
- va_start(ap, flags);
- for (;;) {
- if (!va_arg(ap, char **))
- break;
- n++;
- }
- va_end(ap);
-
- if (n <= 0)
- return 0;
-
- /* Read all words into a temporary array */
- l = newa0(char*, n);
- for (c = 0; c < n; c++) {
-
- r = extract_first_word(p, &l[c], separators, flags);
- if (r < 0) {
- int j;
-
- for (j = 0; j < c; j++)
- free(l[j]);
-
- return r;
- }
-
- if (r == 0)
- break;
- }
-
- /* If we managed to parse all words, return them in the passed
- * in parameters */
- va_start(ap, flags);
- for (i = 0; i < n; i++) {
- char **v;
-
- v = va_arg(ap, char **);
- assert(v);
-
- *v = l[i];
- }
- va_end(ap);
-
- return c;
-}
-
int free_and_strdup(char **p, const char *s) {
char *t;
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