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-rw-r--r--src/core/load-fragment.c226
1 files changed, 112 insertions, 114 deletions
diff --git a/src/core/load-fragment.c b/src/core/load-fragment.c
index df5fe6fb32..a48cb4029a 100644
--- a/src/core/load-fragment.c
+++ b/src/core/load-fragment.c
@@ -520,9 +520,9 @@ int config_parse_exec(
void *data,
void *userdata) {
- ExecCommand **e = data, *nce;
- char *path, **n;
- unsigned k;
+ ExecCommand **e = data;
+ const char *p;
+ bool semicolon;
int r;
assert(filename);
@@ -532,156 +532,154 @@ int config_parse_exec(
e += ltype;
+ rvalue += strspn(rvalue, WHITESPACE);
+ p = rvalue;
+
if (isempty(rvalue)) {
/* An empty assignment resets the list */
*e = exec_command_free_list(*e);
return 0;
}
- /* We accept an absolute path as first argument, or
- * alternatively an absolute prefixed with @ to allow
- * overriding of argv[0]. */
- for (;;) {
+ do {
int i;
- const char *word, *state, *reason;
- size_t l;
+ _cleanup_strv_free_ char **n = NULL;
+ size_t nlen = 0, nbufsize = 0;
+ _cleanup_free_ ExecCommand *nce = NULL;
+ _cleanup_free_ char *path = NULL, *firstword = NULL;
+ char *f;
bool separate_argv0 = false, ignore = false;
- path = NULL;
- nce = NULL;
- n = NULL;
+ semicolon = false;
- rvalue += strspn(rvalue, WHITESPACE);
+ r = unquote_first_word_and_warn(&p, &firstword, UNQUOTE_CUNESCAPE, unit, filename, line, rvalue);
+ if (r <= 0)
+ return 0;
- if (rvalue[0] == 0)
- break;
+ f = firstword;
+ for (i = 0; i < 2; i++) {
+ /* We accept an absolute path as first argument, or
+ * alternatively an absolute prefixed with @ to allow
+ * overriding of argv[0]. */
+ if (*f == '-' && !ignore)
+ ignore = true;
+ else if (*f == '@' && !separate_argv0)
+ separate_argv0 = true;
+ else
+ break;
+ f ++;
+ }
- k = 0;
- FOREACH_WORD_QUOTED(word, l, rvalue, state) {
- if (k == 0) {
- for (i = 0; i < 2; i++) {
- if (*word == '-' && !ignore) {
- ignore = true;
- word ++;
- }
-
- if (*word == '@' && !separate_argv0) {
- separate_argv0 = true;
- word ++;
- }
- }
- } else if (strneq(word, ";", MAX(l, 1U)))
- goto found;
+ if (isempty(f)) {
+ /* First word is either "-" or "@" with no command. */
+ log_syntax(unit, LOG_ERR, filename, line, EINVAL,
+ "Empty path in command line, ignoring: \"%s\"", rvalue);
+ return 0;
+ }
- k++;
+ if (!string_is_safe(f)) {
+ log_syntax(unit, LOG_ERR, filename, line, EINVAL,
+ "Executable path contains special characters, ignoring: %s", rvalue);
+ return 0;
}
- if (!isempty(state)) {
- log_syntax(unit, LOG_ERR, filename, line, EINVAL, "Trailing garbage, ignoring.");
+ if (!path_is_absolute(f)) {
+ log_syntax(unit, LOG_ERR, filename, line, EINVAL,
+ "Executable path is not absolute, ignoring: %s", rvalue);
+ return 0;
+ }
+ if (endswith(f, "/")) {
+ log_syntax(unit, LOG_ERR, filename, line, EINVAL,
+ "Executable path specifies a directory, ignoring: %s", rvalue);
return 0;
}
- found:
- /* If separate_argv0, we'll move first element to path variable */
- n = new(char*, MAX(k + !separate_argv0, 1u));
- if (!n)
- return log_oom();
+ if (f == firstword) {
+ path = firstword;
+ firstword = NULL;
+ } else {
+ path = strdup(f);
+ if (!path)
+ return log_oom();
+ }
- k = 0;
- FOREACH_WORD_QUOTED(word, l, rvalue, state) {
- char *c;
- unsigned skip;
-
- if (separate_argv0 ? path == NULL : k == 0) {
- /* first word, very special */
- skip = separate_argv0 + ignore;
-
- /* skip special chars in the beginning */
- if (l <= skip) {
- log_syntax(unit, LOG_ERR, filename, line, EINVAL,
- "Empty path in command line, ignoring: \"%s\"", rvalue);
- r = 0;
- goto fail;
- }
+ if (!separate_argv0) {
+ if (!GREEDY_REALLOC(n, nbufsize, nlen + 2))
+ return log_oom();
+ f = strdup(path);
+ if (!f)
+ return log_oom();
+ n[nlen++] = f;
+ n[nlen] = NULL;
+ }
- } else if (strneq(word, ";", MAX(l, 1U)))
- /* new commandline */
- break;
+ path_kill_slashes(path);
- else
- skip = strneq(word, "\\;", MAX(l, 1U));
+ for (;;) {
+ _cleanup_free_ char *word = NULL;
- r = cunescape_length(word + skip, l - skip, UNESCAPE_RELAX, &c);
- if (r < 0) {
- log_syntax(unit, LOG_ERR, filename, line, r, "Failed to unescape command line, ignoring: %s", rvalue);
- r = 0;
- goto fail;
+ /* Check explicitly for an unquoted semicolon as
+ * command separator token. */
+ if (p[0] == ';' && (!p[1] || strchr(WHITESPACE, p[1]))) {
+ p ++;
+ p += strspn(p, WHITESPACE);
+ semicolon = true;
+ break;
}
- if (!utf8_is_valid(c)) {
- log_invalid_utf8(unit, LOG_ERR, filename, line, EINVAL, rvalue);
- r = 0;
- goto fail;
+ /* Check for \; explicitly, to not confuse it with \\;
+ * or "\;" or "\\;" etc. unquote_first_word would
+ * return the same for all of those. */
+ if (p[0] == '\\' && p[1] == ';' && (!p[2] || strchr(WHITESPACE, p[2]))) {
+ p += 2;
+ p += strspn(p, WHITESPACE);
+ if (!GREEDY_REALLOC(n, nbufsize, nlen + 2))
+ return log_oom();
+ f = strdup(";");
+ if (!f)
+ return log_oom();
+ n[nlen++] = f;
+ n[nlen] = NULL;
+ continue;
}
- /* where to stuff this? */
- if (separate_argv0 && path == NULL)
- path = c;
- else
- n[k++] = c;
- }
+ r = unquote_first_word_and_warn(&p, &word, UNQUOTE_CUNESCAPE, unit, filename, line, rvalue);
+ if (r == 0)
+ break;
+ else if (r < 0)
+ return 0;
- n[k] = NULL;
+ if (!GREEDY_REALLOC(n, nbufsize, nlen + 2))
+ return log_oom();
+ n[nlen++] = word;
+ n[nlen] = NULL;
+ word = NULL;
+ }
- if (!n[0])
- reason = "Empty executable name or zeroeth argument";
- else if (!string_is_safe(path ?: n[0]))
- reason = "Executable path contains special characters";
- else if (!path_is_absolute(path ?: n[0]))
- reason = "Executable path is not absolute";
- else if (endswith(path ?: n[0], "/"))
- reason = "Executable path specifies a directory";
- else
- goto ok;
-
- log_syntax(unit, LOG_ERR, filename, line, EINVAL, "%s, ignoring: %s", reason, rvalue);
- r = 0;
- goto fail;
-
-ok:
- if (!path) {
- path = strdup(n[0]);
- if (!path) {
- r = log_oom();
- goto fail;
- }
+ if (!n || !n[0]) {
+ log_syntax(unit, LOG_ERR, filename, line, EINVAL,
+ "Empty executable name or zeroeth argument, ignoring: %s", rvalue);
+ return 0;
}
nce = new0(ExecCommand, 1);
- if (!nce) {
- r = log_oom();
- goto fail;
- }
+ if (!nce)
+ return log_oom();
nce->argv = n;
nce->path = path;
nce->ignore = ignore;
- path_kill_slashes(nce->path);
-
exec_command_append_list(e, nce);
- rvalue = state;
- }
-
- return 0;
+ /* Do not _cleanup_free_ these. */
+ n = NULL;
+ path = NULL;
+ nce = NULL;
-fail:
- n[k] = NULL;
- strv_free(n);
- free(path);
- free(nce);
+ rvalue = p;
+ } while (semicolon);
- return r;
+ return 0;
}
DEFINE_CONFIG_PARSE_ENUM(config_parse_service_type, service_type, ServiceType, "Failed to parse service type");
generated by cgit v1.2.3-54-g00ecf (git 2.45.2) at 2024-12-28 23:44:15 +0000