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-rw-r--r--src/shared/fileio.c395
1 files changed, 287 insertions, 108 deletions
diff --git a/src/shared/fileio.c b/src/shared/fileio.c
index 5b8be5ce2d..96e23c5bbb 100644
--- a/src/shared/fileio.c
+++ b/src/shared/fileio.c
@@ -177,169 +177,348 @@ int read_full_file(const char *fn, char **contents, size_t *size) {
return 0;
}
-int parse_env_file(
+static int parse_env_file_internal(
const char *fname,
- const char *separator, ...) {
+ const char *newline,
+ int (*push) (const char *key, char *value, void *userdata),
+ void *userdata) {
+
+ _cleanup_free_ char *contents = NULL, *key = NULL;
+ size_t key_alloc = 0, n_key = 0, value_alloc = 0, n_value = 0, last_whitespace = (size_t) -1;
+ char *p, *value = NULL;
+ int r;
- int r = 0;
- char *contents = NULL, *p;
+ enum {
+ PRE_KEY,
+ KEY,
+ PRE_EQUAL,
+ PRE_VALUE,
+ VALUE,
+ VALUE_ESCAPE,
+ SINGLE_QUOTE_VALUE,
+ SINGLE_QUOTE_VALUE_ESCAPE,
+ DOUBLE_QUOTE_VALUE,
+ DOUBLE_QUOTE_VALUE_ESCAPE,
+ COMMENT,
+ COMMENT_ESCAPE
+ } state = PRE_KEY;
assert(fname);
- assert(separator);
+ assert(newline);
r = read_full_file(fname, &contents, NULL);
if (r < 0)
return r;
- p = contents;
- for (;;) {
- const char *key = NULL;
+ for (p = contents; *p; p++) {
+ char c = *p;
+
+ switch (state) {
+
+ case PRE_KEY:
+ if (strchr(COMMENTS, c))
+ state = COMMENT;
+ else if (!strchr(WHITESPACE, c)) {
+ state = KEY;
+ if (!greedy_realloc((void**) &key, &key_alloc, n_key+2)) {
+ r = -ENOMEM;
+ goto fail;
+ }
+
+ key[n_key++] = c;
+ }
+ break;
+
+ case KEY:
+ if (strchr(newline, c)) {
+ state = PRE_KEY;
+ n_key = 0;
+ } else if (strchr(WHITESPACE, c))
+ state = PRE_EQUAL;
+ else if (c == '=')
+ state = PRE_VALUE;
+ else {
+ if (!greedy_realloc((void**) &key, &key_alloc, n_key+2)) {
+ r = -ENOMEM;
+ goto fail;
+ }
+
+ key[n_key++] = c;
+ }
- p += strspn(p, separator);
- p += strspn(p, WHITESPACE);
+ break;
+
+ case PRE_EQUAL:
+ if (strchr(newline, c)) {
+ state = PRE_KEY;
+ n_key = 0;
+ } else if (c == '=')
+ state = PRE_VALUE;
+ else if (!strchr(WHITESPACE, c)) {
+ n_key = 0;
+ state = COMMENT;
+ }
- if (!*p)
break;
- if (!strchr(COMMENTS, *p)) {
- va_list ap;
- char **value;
+ case PRE_VALUE:
+ if (strchr(newline, c)) {
+ state = PRE_KEY;
+ key[n_key] = 0;
- va_start(ap, separator);
- while ((key = va_arg(ap, char *))) {
- size_t n;
- char *v;
+ if (value)
+ value[n_value] = 0;
- value = va_arg(ap, char **);
+ r = push(key, value, userdata);
+ if (r < 0)
+ goto fail;
+
+ n_key = 0;
+ value = NULL;
+ value_alloc = n_value = 0;
+ } else if (c == '\'')
+ state = SINGLE_QUOTE_VALUE;
+ else if (c == '\"')
+ state = DOUBLE_QUOTE_VALUE;
+ else if (c == '\\')
+ state = VALUE_ESCAPE;
+ else if (!strchr(WHITESPACE, c)) {
+ state = VALUE;
+
+ if (!greedy_realloc((void**) &value, &value_alloc, n_value+2)) {
+ r = -ENOMEM;
+ goto fail;
+ }
+
+ value[n_value++] = c;
+ }
+
+ break;
+
+ case VALUE:
+ if (strchr(newline, c)) {
+ state = PRE_KEY;
+ key[n_key] = 0;
+
+ if (value)
+ value[n_value] = 0;
+
+ /* Chomp off trailing whitespace */
+ if (last_whitespace != (size_t) -1)
+ value[last_whitespace] = 0;
+
+ r = push(key, value, userdata);
+ if (r < 0)
+ goto fail;
+
+ n_key = 0;
+ value = NULL;
+ value_alloc = n_value = 0;
+ } else if (c == '\\') {
+ state = VALUE_ESCAPE;
+ last_whitespace = (size_t) -1;
+ } else {
+ if (!strchr(WHITESPACE, c))
+ last_whitespace = (size_t) -1;
+ else if (last_whitespace == (size_t) -1)
+ last_whitespace = n_value;
+
+ if (!greedy_realloc((void**) &value, &value_alloc, n_value+2)) {
+ r = -ENOMEM;
+ goto fail;
+ }
+
+ value[n_value++] = c;
+ }
+
+ break;
+
+ case VALUE_ESCAPE:
+ state = VALUE;
+
+ if (!strchr(newline, c)) {
+ /* Escaped newlines we eat up entirely */
+ if (!greedy_realloc((void**) &value, &value_alloc, n_value+2)) {
+ r = -ENOMEM;
+ goto fail;
+ }
+
+ value[n_value++] = c;
+ }
+ break;
+
+ case SINGLE_QUOTE_VALUE:
+ if (c == '\'')
+ state = PRE_VALUE;
+ else if (c == '\\')
+ state = SINGLE_QUOTE_VALUE_ESCAPE;
+ else {
+ if (!greedy_realloc((void**) &value, &value_alloc, n_value+2)) {
+ r = -ENOMEM;
+ goto fail;
+ }
- n = strlen(key);
- if (!strneq(p, key, n) ||
- p[n] != '=')
- continue;
+ value[n_value++] = c;
+ }
- p += n + 1;
- n = strcspn(p, separator);
+ break;
- if (n >= 2 &&
- strchr(QUOTES, p[0]) &&
- p[n-1] == p[0])
- v = strndup(p+1, n-2);
- else
- v = strndup(p, n);
+ case SINGLE_QUOTE_VALUE_ESCAPE:
+ state = SINGLE_QUOTE_VALUE;
- if (!v) {
+ if (!strchr(newline, c)) {
+ if (!greedy_realloc((void**) &value, &value_alloc, n_value+2)) {
r = -ENOMEM;
- va_end(ap);
goto fail;
}
- if (v[0] == '\0') {
- /* return empty value strings as NULL */
- free(v);
- v = NULL;
+ value[n_value++] = c;
+ }
+ break;
+
+ case DOUBLE_QUOTE_VALUE:
+ if (c == '\"')
+ state = PRE_VALUE;
+ else if (c == '\\')
+ state = DOUBLE_QUOTE_VALUE_ESCAPE;
+ else {
+ if (!greedy_realloc((void**) &value, &value_alloc, n_value+2)) {
+ r = -ENOMEM;
+ goto fail;
}
- free(*value);
- *value = v;
+ value[n_value++] = c;
+ }
+
+ break;
+
+ case DOUBLE_QUOTE_VALUE_ESCAPE:
+ state = DOUBLE_QUOTE_VALUE;
- p += n;
+ if (!strchr(newline, c)) {
+ if (!greedy_realloc((void**) &value, &value_alloc, n_value+2)) {
+ r = -ENOMEM;
+ goto fail;
+ }
- r ++;
- break;
+ value[n_value++] = c;
}
- va_end(ap);
+ break;
+
+ case COMMENT:
+ if (c == '\\')
+ state = COMMENT_ESCAPE;
+ else if (strchr(newline, c))
+ state = PRE_KEY;
+ break;
+
+ case COMMENT_ESCAPE:
+ state = COMMENT;
+ break;
}
+ }
+
+ if (state == PRE_VALUE ||
+ state == VALUE ||
+ state == VALUE_ESCAPE ||
+ state == SINGLE_QUOTE_VALUE ||
+ state == SINGLE_QUOTE_VALUE_ESCAPE ||
+ state == DOUBLE_QUOTE_VALUE ||
+ state == DOUBLE_QUOTE_VALUE_ESCAPE) {
- if (!key)
- p += strcspn(p, separator);
+ key[n_key] = 0;
+
+ if (value)
+ value[n_value] = 0;
+
+ r = push(key, value, userdata);
+ if (r < 0)
+ goto fail;
}
+ return 0;
+
fail:
- free(contents);
+ free(value);
return r;
}
-int load_env_file(const char *fname, char ***rl) {
+static int parse_env_file_push(const char *key, char *value, void *userdata) {
+ const char *k;
+ va_list* ap = (va_list*) userdata;
+ va_list aq;
- _cleanup_fclose_ FILE *f;
- _cleanup_strv_free_ char **m = NULL;
- _cleanup_free_ char *c = NULL;
+ va_copy(aq, *ap);
- assert(fname);
- assert(rl);
+ while ((k = va_arg(aq, const char *))) {
+ char **v;
- /* This reads an environment file, but will not complain about
- * any invalid assignments, that needs to be done by the
- * caller */
+ v = va_arg(aq, char **);
- f = fopen(fname, "re");
- if (!f)
- return -errno;
+ if (streq(key, k)) {
+ va_end(aq);
+ free(*v);
+ *v = value;
+ return 1;
+ }
+ }
- while (!feof(f)) {
- char l[LINE_MAX], *p, *cs, *b;
+ va_end(aq);
- if (!fgets(l, sizeof(l), f)) {
- if (ferror(f))
- return -errno;
+ free(value);
+ return 0;
+}
- /* The previous line was a continuation line?
- * Let's process it now, before we leave the
- * loop */
- if (c)
- goto process;
+int parse_env_file(
+ const char *fname,
+ const char *newline, ...) {
- break;
- }
+ va_list ap;
+ int r;
- /* Is this a continuation line? If so, just append
- * this to c, and go to next line right-away */
- cs = endswith(l, "\\\n");
- if (cs) {
- *cs = '\0';
- b = strappend(c, l);
- if (!b)
- return -ENOMEM;
-
- free(c);
- c = b;
- continue;
- }
+ if (!newline)
+ newline = NEWLINE;
- /* If the previous line was a continuation line,
- * append the current line to it */
- if (c) {
- b = strappend(c, l);
- if (!b)
- return -ENOMEM;
+ va_start(ap, newline);
+ r = parse_env_file_internal(fname, newline, parse_env_file_push, &ap);
+ va_end(ap);
- free(c);
- c = b;
- }
+ return r;
+}
- process:
- p = strstrip(c ? c : l);
+static int load_env_file_push(const char *key, char *value, void *userdata) {
+ char ***m = userdata;
+ char *p;
+ int r;
- if (*p && !strchr(COMMENTS, *p)) {
- _cleanup_free_ char *u;
- int k;
+ p = strjoin(key, "=", strempty(value), NULL);
+ if (!p)
+ return -ENOMEM;
- u = normalize_env_assignment(p);
- if (!u)
- return -ENOMEM;
+ r = strv_push(m, p);
+ if (r < 0) {
+ free(p);
+ return r;
+ }
- k = strv_extend(&m, u);
- if (k < 0)
- return -ENOMEM;
- }
+ free(value);
+ return 0;
+}
+
+int load_env_file(const char *fname, const char *newline, char ***rl) {
+ char **m = NULL;
+ int r;
- free(c);
- c = NULL;
+ if (!newline)
+ newline = NEWLINE;
+
+ r = parse_env_file_internal(fname, newline, load_env_file_push, &m);
+ if (r < 0) {
+ strv_free(m);
+ return r;
}
*rl = m;
- m = NULL;
-
return 0;
}
generated by cgit v1.2.3-54-g00ecf (git 2.45.2) at 2024-11-18 01:30:16 +0000