patch: don't trash permissions of patched file

diff --git a/editors/patch.c b/editors/patch.c
index ff1a01d..9a678e1 100644 (file)
--- a/editors/patch.c
+++ b/editors/patch.c
@@ -71,12 +71,6 @@ static char *extract_filename(char *line, int patch_level)
        return xstrdup(filename_start_ptr);
 }
 
-static int file_doesnt_exist(const char *filename)
-{
-       struct stat statbuf;
-       return stat(filename, &statbuf);
-}
-
 int patch_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
 int patch_main(int argc ATTRIBUTE_UNUSED, char **argv)
 {
@@ -84,7 +78,8 @@ int patch_main(int argc ATTRIBUTE_UNUSED, char **argv)
        char *patch_line;
        int ret;
        FILE *patch_file = NULL;
-
+       struct stat saved_stat;
+       
        {
                char *p, *i;
                ret = getopt32(argv, "p:i:", &p, &i);
@@ -134,8 +129,9 @@ int patch_main(int argc ATTRIBUTE_UNUSED, char **argv)
                }
                new_filename = extract_filename(patch_line, patch_level);
                free(patch_line);
-
-               if (file_doesnt_exist(new_filename)) {
+               
+               /* Get access rights from the file to be patched, -1 file does not exist */
+               if (stat(new_filename, &saved_stat)) {
                        char *line_ptr;
                        /* Create leading directories */
                        line_ptr = strrchr(new_filename, '/');
@@ -152,9 +148,10 @@ int patch_main(int argc ATTRIBUTE_UNUSED, char **argv)
                        strcat(backup_filename, ".orig");
                        xrename(new_filename, backup_filename);
                        dst_stream = xfopen(new_filename, "w");
+                       fchmod(fileno(dst_stream), saved_stat.st_mode);
                }
 
-               if ((backup_filename == NULL) || file_doesnt_exist(original_filename)) {
+               if ((backup_filename == NULL) || stat(original_filename, &saved_stat)) {
                        src_stream = NULL;
                } else {
                        if (strcmp(original_filename, new_filename) == 0) {