Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / tools / perf / util / quote.c

diff --git a/kernel/tools/perf/util/quote.c b/kernel/tools/perf/util/quote.c
new file mode 100644 (file)
index 0000000..01f0324
--- /dev/null
+++ b/kernel/tools/perf/util/quote.c
@@ -0,0 +1,54 @@
+#include "cache.h"
+#include "quote.h"
+
+/* Help to copy the thing properly quoted for the shell safety.
+ * any single quote is replaced with '\'', any exclamation point
+ * is replaced with '\!', and the whole thing is enclosed in a
+ *
+ * E.g.
+ *  original     sq_quote     result
+ *  name     ==> name      ==> 'name'
+ *  a b      ==> a b       ==> 'a b'
+ *  a'b      ==> a'\''b    ==> 'a'\''b'
+ *  a!b      ==> a'\!'b    ==> 'a'\!'b'
+ */
+static inline int need_bs_quote(char c)
+{
+       return (c == '\'' || c == '!');
+}
+
+static void sq_quote_buf(struct strbuf *dst, const char *src)
+{
+       char *to_free = NULL;
+
+       if (dst->buf == src)
+               to_free = strbuf_detach(dst, NULL);
+
+       strbuf_addch(dst, '\'');
+       while (*src) {
+               size_t len = strcspn(src, "'!");
+               strbuf_add(dst, src, len);
+               src += len;
+               while (need_bs_quote(*src)) {
+                       strbuf_addstr(dst, "'\\");
+                       strbuf_addch(dst, *src++);
+                       strbuf_addch(dst, '\'');
+               }
+       }
+       strbuf_addch(dst, '\'');
+       free(to_free);
+}
+
+void sq_quote_argv(struct strbuf *dst, const char** argv, size_t maxlen)
+{
+       int i;
+
+       /* Copy into destination buffer. */
+       strbuf_grow(dst, 255);
+       for (i = 0; argv[i]; ++i) {
+               strbuf_addch(dst, ' ');
+               sq_quote_buf(dst, argv[i]);
+               if (maxlen && dst->len > maxlen)
+                       die("Too many or long arguments");
+       }
+}