diff format documentation: describe raw combined diff format

diff --git a/builtin-update-index.c b/builtin-update-index.c
index 3fbdc67b8880a7d1b46e39d1b7d03c00d65b1408..8659800eec055913327192747b3c342e4da462b8 100644 (file)
--- a/builtin-update-index.c
+++ b/builtin-update-index.c
@@ -109,16 +109,17 @@ static int add_file_to_cache(const char *path)
        ce->ce_flags = htons(namelen);
        fill_stat_cache_info(ce, &st);
 
-       ce->ce_mode = create_ce_mode(st.st_mode);
-       if (!trust_executable_bit) {
-               /* If there is an existing entry, pick the mode bits
-                * from it, otherwise assume unexecutable.
+       if (trust_executable_bit && has_symlinks)
+               ce->ce_mode = create_ce_mode(st.st_mode);
+       else {
+               /* If there is an existing entry, pick the mode bits and type
+                * from it, otherwise assume unexecutable regular file.
                 */
+               struct cache_entry *ent;
                int pos = cache_name_pos(path, namelen);
-               if (0 <= pos)
-                       ce->ce_mode = active_cache[pos]->ce_mode;
-               else if (S_ISREG(st.st_mode))
-                       ce->ce_mode = create_ce_mode(S_IFREG | 0666);
+
+               ent = (0 <= pos) ? active_cache[pos] : NULL;
+               ce->ce_mode = ce_mode_from_stat(ent, st.st_mode);
        }
 
        if (index_path(ce->sha1, path, &st, !info_only))
@@ -226,6 +227,7 @@ static void read_index_info(int line_termination)
                char *path_name;
                unsigned char sha1[20];
                unsigned int mode;
+               unsigned long ul;
                int stage;
 
                /* This reads lines formatted in one of three formats:
@@ -248,9 +250,12 @@ static void read_index_info(int line_termination)
                if (buf.eof)
                        break;
 
-               mode = strtoul(buf.buf, &ptr, 8);
-               if (ptr == buf.buf || *ptr != ' ')
+               errno = 0;
+               ul = strtoul(buf.buf, &ptr, 8);
+               if (ptr == buf.buf || *ptr != ' '
+                   || errno || (unsigned int) ul != ul)
                        goto bad_line;
+               mode = ul;
 
                tab = strchr(ptr, '\t');
                if (!tab || tab - ptr < 41)
@@ -546,7 +551,7 @@ int cmd_update_index(int argc, const char **argv, const char *prefix)
                                if (i+3 >= argc)
                                        die("git-update-index: --cacheinfo <mode> <sha1> <path>");
 
-                               if ((sscanf(argv[i+1], "%o", &mode) != 1) ||
+                               if (strtoul_ui(argv[i+1], 8, &mode) ||
                                    get_sha1_hex(argv[i+2], sha1) ||
                                    add_cacheinfo(mode, sha1, argv[i+3], 0))
                                        die("git-update-index: --cacheinfo"