forked from ariadne/pkgconf
fragment: add new option to control escaping shell arguments
William Pitcock
parent
ae42261c3f
commit
01fe5743ea
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@ -52,6 +52,7 @@ which is composable, mergeable and reorderable.
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Calculates the required memory to store a `fragment list` when rendered as a string.
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:param pkgconf_list_t* list: The `fragment list` being rendered.
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:param bool escape: Whether or not to escape special shell characters.
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:return: the amount of bytes required to represent the `fragment list` when rendered
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:rtype: size_t
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@ -62,6 +63,7 @@ which is composable, mergeable and reorderable.
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:param pkgconf_list_t* list: The `fragment list` being rendered.
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:param char* buf: The buffer to render the fragment list into.
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:param size_t buflen: The length of the buffer.
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:param bool escape: Whether or not to escape special shell characters.
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:return: nothing
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.. c:function:: char *pkgconf_fragment_render(const pkgconf_list_t *list)
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@ -69,6 +71,7 @@ which is composable, mergeable and reorderable.
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Allocate memory and render a `fragment list` into it.
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:param pkgconf_list_t* list: The `fragment list` being rendered.
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:param bool escape: Whether or not to escape special shell characters.
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:return: An allocated string containing the rendered `fragment list`.
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:rtype: char *
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@ -372,8 +372,42 @@ pkgconf_fragment_filter(const pkgconf_client_t *client, pkgconf_list_t *dest, pk
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}
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}
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static inline char *
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fragment_escape(const char *src)
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{
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ssize_t outlen = strlen(src) + 10;
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char *out = calloc(outlen, 1);
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char *dst = out;
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while (*src)
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{
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if ((*src < ' ') ||
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(*src > ' ' && *src < '$') ||
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(*src > '$' && *src < '(') ||
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(*src > ')' && *src < '+') ||
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(*src > ':' && *src < '=') ||
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(*src > '=' && *src < '@') ||
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(*src > 'Z' && *src < '^') ||
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(*src == '`') ||
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(*src > 'z' && *src < '~') ||
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(*src > '~'))
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*dst++ = '\\';
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*dst++ = *src++;
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if ((ptrdiff_t)(dst - out) + 2 > outlen)
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{
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outlen *= 2;
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out = realloc(out, outlen);
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}
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}
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*dst = 0;
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return out;
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}
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static inline size_t
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pkgconf_fragment_len(const pkgconf_fragment_t *frag)
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pkgconf_fragment_len(const pkgconf_fragment_t *frag, bool escape)
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{
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size_t len = 1;
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@ -381,7 +415,16 @@ pkgconf_fragment_len(const pkgconf_fragment_t *frag)
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len += 2;
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if (frag->data != NULL)
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{
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if (!escape)
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len += strlen(frag->data);
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else
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{
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char *tmp = fragment_escape(frag->data);
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len += strlen(tmp);
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free(tmp);
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}
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}
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return len;
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}
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@ -394,11 +437,12 @@ pkgconf_fragment_len(const pkgconf_fragment_t *frag)
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* Calculates the required memory to store a `fragment list` when rendered as a string.
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*
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* :param pkgconf_list_t* list: The `fragment list` being rendered.
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* :param bool escape: Whether or not to escape special shell characters.
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* :return: the amount of bytes required to represent the `fragment list` when rendered
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* :rtype: size_t
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*/
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size_t
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pkgconf_fragment_render_len(const pkgconf_list_t *list)
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pkgconf_fragment_render_len(const pkgconf_list_t *list, bool escape)
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{
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size_t out = 1; /* trailing nul */
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pkgconf_node_t *node;
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@ -406,7 +450,7 @@ pkgconf_fragment_render_len(const pkgconf_list_t *list)
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PKGCONF_FOREACH_LIST_ENTRY(list->head, node)
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{
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const pkgconf_fragment_t *frag = node->data;
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out += pkgconf_fragment_len(frag);
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out += pkgconf_fragment_len(frag, escape);
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}
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return out;
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@ -422,10 +466,11 @@ pkgconf_fragment_render_len(const pkgconf_list_t *list)
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* :param pkgconf_list_t* list: The `fragment list` being rendered.
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* :param char* buf: The buffer to render the fragment list into.
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* :param size_t buflen: The length of the buffer.
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* :param bool escape: Whether or not to escape special shell characters.
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* :return: nothing
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*/
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void
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pkgconf_fragment_render_buf(const pkgconf_list_t *list, char *buf, size_t buflen)
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pkgconf_fragment_render_buf(const pkgconf_list_t *list, char *buf, size_t buflen, bool escape)
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{
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pkgconf_node_t *node;
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char *bptr = buf;
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@ -437,7 +482,7 @@ pkgconf_fragment_render_buf(const pkgconf_list_t *list, char *buf, size_t buflen
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const pkgconf_fragment_t *frag = node->data;
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size_t buf_remaining = buflen - (bptr - buf);
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if (pkgconf_fragment_len(frag) > buf_remaining)
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if (pkgconf_fragment_len(frag, escape) > buf_remaining)
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break;
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if (frag->type)
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@ -447,7 +492,16 @@ pkgconf_fragment_render_buf(const pkgconf_list_t *list, char *buf, size_t buflen
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}
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if (frag->data)
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{
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if (!escape)
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bptr += pkgconf_strlcpy(bptr, frag->data, buf_remaining);
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else
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{
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char *tmp = fragment_escape(frag->data);
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bptr += pkgconf_strlcpy(bptr, tmp, buf_remaining);
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free(tmp);
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}
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}
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*bptr++ = ' ';
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}
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@ -463,16 +517,17 @@ pkgconf_fragment_render_buf(const pkgconf_list_t *list, char *buf, size_t buflen
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* Allocate memory and render a `fragment list` into it.
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*
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* :param pkgconf_list_t* list: The `fragment list` being rendered.
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* :param bool escape: Whether or not to escape special shell characters.
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* :return: An allocated string containing the rendered `fragment list`.
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* :rtype: char *
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*/
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char *
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pkgconf_fragment_render(const pkgconf_list_t *list)
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pkgconf_fragment_render(const pkgconf_list_t *list, bool escape)
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{
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size_t buflen = pkgconf_fragment_render_len(list);
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size_t buflen = pkgconf_fragment_render_len(list, escape);
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char *buf = calloc(1, buflen);
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pkgconf_fragment_render_buf(list, buf, buflen);
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pkgconf_fragment_render_buf(list, buf, buflen, escape);
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return buf;
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}
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@ -268,9 +268,9 @@ void pkgconf_fragment_copy(const pkgconf_client_t *client, pkgconf_list_t *list,
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void pkgconf_fragment_delete(pkgconf_list_t *list, pkgconf_fragment_t *node);
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void pkgconf_fragment_free(pkgconf_list_t *list);
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void pkgconf_fragment_filter(const pkgconf_client_t *client, pkgconf_list_t *dest, pkgconf_list_t *src, pkgconf_fragment_filter_func_t filter_func, void *data);
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size_t pkgconf_fragment_render_len(const pkgconf_list_t *list);
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void pkgconf_fragment_render_buf(const pkgconf_list_t *list, char *buf, size_t len);
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char *pkgconf_fragment_render(const pkgconf_list_t *list);
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size_t pkgconf_fragment_render_len(const pkgconf_list_t *list, bool escape);
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void pkgconf_fragment_render_buf(const pkgconf_list_t *list, char *buf, size_t len, bool escape);
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char *pkgconf_fragment_render(const pkgconf_list_t *list, bool escape);
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bool pkgconf_fragment_has_system_dir(const pkgconf_client_t *client, const pkgconf_fragment_t *frag);
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/* fileio.c */
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