checkout-index: plug memory leak from prefix_path()

prefix_path() sometimes allocates new memory and returns it, and
other times returns the incoming path argument intact.  The
callers need to be a bit careful not to leak memory.

Signed-off-by: Junio C Hamano <junkio@cox.net>

diff --git a/checkout-index.c b/checkout-index.c
index dd6a2d86fe59f1c75659cccef7a19c42bd2f721c..0b9cabc61cafa06501064c0b2cccbc3d434904c2 100644 (file)
--- a/checkout-index.c
+++ b/checkout-index.c
@@ -269,12 +269,16 @@ int main(int argc, char **argv)
        /* Check out named files first */
        for ( ; i < argc; i++) {
                const char *arg = argv[i];
+               const char *p;
 
                if (all)
                        die("git-checkout-index: don't mix '--all' and explicit filenames");
                if (read_from_stdin)
                        die("git-checkout-index: don't mix '--stdin' and explicit filenames");
-               checkout_file(prefix_path(prefix, prefix_length, arg));
+               p = prefix_path(prefix, prefix_length, arg);
+               checkout_file(p);
+               if (p != arg)
+                       free((char*)p);
        }
 
        if (read_from_stdin) {
@@ -284,6 +288,8 @@ int main(int argc, char **argv)
                strbuf_init(&buf);
                while (1) {
                        char *path_name;
+                       const char *p;
+
                        read_line(&buf, stdin, line_termination);
                        if (buf.eof)
                                break;
@@ -291,7 +297,10 @@ int main(int argc, char **argv)
                                path_name = unquote_c_style(buf.buf, NULL);
                        else
                                path_name = buf.buf;
-                       checkout_file(prefix_path(prefix, prefix_length, path_name));
+                       p = prefix_path(prefix, prefix_length, path_name);
+                       checkout_file(p);
+                       if (p != path_name)
+                               free((char *)p);
                        if (path_name != buf.buf)
                                free(path_name);
                }