Print empty line between raw, stat, summary and patch
[gitweb.git] / read-cache.c
index ed0da38e07cdb3d0a05a12bdebf10d833e53bd08..3c32aae7e8ae63bccad83a603f2b86c66965cd26 100644 (file)
@@ -346,6 +346,70 @@ int ce_path_match(const struct cache_entry *ce, const char **pathspec)
        return 0;
 }
 
+/*
+ * We fundamentally don't like some paths: we don't want
+ * dot or dot-dot anywhere, and for obvious reasons don't
+ * want to recurse into ".git" either.
+ *
+ * Also, we don't want double slashes or slashes at the
+ * end that can make pathnames ambiguous.
+ */
+static int verify_dotfile(const char *rest)
+{
+       /*
+        * The first character was '.', but that
+        * has already been discarded, we now test
+        * the rest.
+        */
+       switch (*rest) {
+       /* "." is not allowed */
+       case '\0': case '/':
+               return 0;
+
+       /*
+        * ".git" followed by  NUL or slash is bad. This
+        * shares the path end test with the ".." case.
+        */
+       case 'g':
+               if (rest[1] != 'i')
+                       break;
+               if (rest[2] != 't')
+                       break;
+               rest += 2;
+       /* fallthrough */
+       case '.':
+               if (rest[1] == '\0' || rest[1] == '/')
+                       return 0;
+       }
+       return 1;
+}
+
+int verify_path(const char *path)
+{
+       char c;
+
+       goto inside;
+       for (;;) {
+               if (!c)
+                       return 1;
+               if (c == '/') {
+inside:
+                       c = *path++;
+                       switch (c) {
+                       default:
+                               continue;
+                       case '/': case '\0':
+                               break;
+                       case '.':
+                               if (verify_dotfile(path))
+                                       continue;
+                       }
+                       return 0;
+               }
+               c = *path++;
+       }
+}
+
 /*
  * Do we have another file that has the beginning components being a
  * proper superset of the name we're trying to add?
@@ -487,6 +551,8 @@ int add_cache_entry(struct cache_entry *ce, int option)
 
        if (!ok_to_add)
                return -1;
+       if (!verify_path(ce->name))
+               return -1;
 
        if (!skip_df_check &&
            check_file_directory_conflict(ce, pos, ok_to_replace)) {
@@ -511,6 +577,123 @@ int add_cache_entry(struct cache_entry *ce, int option)
        return 0;
 }
 
+/* Three functions to allow overloaded pointer return; see linux/err.h */
+static inline void *ERR_PTR(long error)
+{
+       return (void *) error;
+}
+
+static inline long PTR_ERR(const void *ptr)
+{
+       return (long) ptr;
+}
+
+static inline long IS_ERR(const void *ptr)
+{
+       return (unsigned long)ptr > (unsigned long)-1000L;
+}
+
+/*
+ * "refresh" does not calculate a new sha1 file or bring the
+ * cache up-to-date for mode/content changes. But what it
+ * _does_ do is to "re-match" the stat information of a file
+ * with the cache, so that you can refresh the cache for a
+ * file that hasn't been changed but where the stat entry is
+ * out of date.
+ *
+ * For example, you'd want to do this after doing a "git-read-tree",
+ * to link up the stat cache details with the proper files.
+ */
+static struct cache_entry *refresh_entry(struct cache_entry *ce, int really)
+{
+       struct stat st;
+       struct cache_entry *updated;
+       int changed, size;
+
+       if (lstat(ce->name, &st) < 0)
+               return ERR_PTR(-errno);
+
+       changed = ce_match_stat(ce, &st, really);
+       if (!changed) {
+               if (really && assume_unchanged &&
+                   !(ce->ce_flags & htons(CE_VALID)))
+                       ; /* mark this one VALID again */
+               else
+                       return NULL;
+       }
+
+       if (ce_modified(ce, &st, really))
+               return ERR_PTR(-EINVAL);
+
+       size = ce_size(ce);
+       updated = xmalloc(size);
+       memcpy(updated, ce, size);
+       fill_stat_cache_info(updated, &st);
+
+       /* In this case, if really is not set, we should leave
+        * CE_VALID bit alone.  Otherwise, paths marked with
+        * --no-assume-unchanged (i.e. things to be edited) will
+        * reacquire CE_VALID bit automatically, which is not
+        * really what we want.
+        */
+       if (!really && assume_unchanged && !(ce->ce_flags & htons(CE_VALID)))
+               updated->ce_flags &= ~htons(CE_VALID);
+
+       return updated;
+}
+
+int refresh_cache(unsigned int flags)
+{
+       int i;
+       int has_errors = 0;
+       int really = (flags & REFRESH_REALLY) != 0;
+       int allow_unmerged = (flags & REFRESH_UNMERGED) != 0;
+       int quiet = (flags & REFRESH_QUIET) != 0;
+       int not_new = (flags & REFRESH_IGNORE_MISSING) != 0;
+
+       for (i = 0; i < active_nr; i++) {
+               struct cache_entry *ce, *new;
+               ce = active_cache[i];
+               if (ce_stage(ce)) {
+                       while ((i < active_nr) &&
+                              ! strcmp(active_cache[i]->name, ce->name))
+                               i++;
+                       i--;
+                       if (allow_unmerged)
+                               continue;
+                       printf("%s: needs merge\n", ce->name);
+                       has_errors = 1;
+                       continue;
+               }
+
+               new = refresh_entry(ce, really);
+               if (!new)
+                       continue;
+               if (IS_ERR(new)) {
+                       if (not_new && PTR_ERR(new) == -ENOENT)
+                               continue;
+                       if (really && PTR_ERR(new) == -EINVAL) {
+                               /* If we are doing --really-refresh that
+                                * means the index is not valid anymore.
+                                */
+                               ce->ce_flags &= ~htons(CE_VALID);
+                               active_cache_changed = 1;
+                       }
+                       if (quiet)
+                               continue;
+                       printf("%s: needs update\n", ce->name);
+                       has_errors = 1;
+                       continue;
+               }
+               active_cache_changed = 1;
+               /* You can NOT just free active_cache[i] here, since it
+                * might not be necessarily malloc()ed but can also come
+                * from mmap(). */
+               active_cache[i] = new;
+       }
+       return has_errors;
+}
+
 static int verify_hdr(struct cache_header *hdr, unsigned long size)
 {
        SHA_CTX c;
@@ -523,7 +706,7 @@ static int verify_hdr(struct cache_header *hdr, unsigned long size)
        SHA1_Init(&c);
        SHA1_Update(&c, hdr, size - 20);
        SHA1_Final(sha1, &c);
-       if (memcmp(sha1, (void *)hdr + size - 20, 20))
+       if (memcmp(sha1, (char *) hdr + size - 20, 20))
                return error("bad index file sha1 signature");
        return 0;
 }
@@ -587,7 +770,7 @@ int read_cache(void)
 
        offset = sizeof(*hdr);
        for (i = 0; i < active_nr; i++) {
-               struct cache_entry *ce = map + offset;
+               struct cache_entry *ce = (struct cache_entry *) ((char *) map + offset);
                offset = offset + ce_size(ce);
                active_cache[i] = ce;
        }
@@ -600,10 +783,11 @@ int read_cache(void)
                 * in 4-byte network byte order.
                 */
                unsigned long extsize;
-               memcpy(&extsize, map + offset + 4, 4);
+               memcpy(&extsize, (char *) map + offset + 4, 4);
                extsize = ntohl(extsize);
-               if (read_index_extension(map + offset,
-                                        map + offset + 8, extsize) < 0)
+               if (read_index_extension(((const char *) map) + offset,
+                                        (char *) map + offset + 8,
+                                        extsize) < 0)
                        goto unmap;
                offset += 8;
                offset += extsize;
@@ -637,13 +821,13 @@ static int ce_write(SHA_CTX *context, int fd, void *data, unsigned int len)
                }
                write_buffer_len = buffered;
                len -= partial;
-               data += partial;
+               data = (char *) data + partial;
        }
        return 0;
 }
 
 static int write_index_ext_header(SHA_CTX *context, int fd,
-                                 unsigned long ext, unsigned long sz)
+                                 unsigned int ext, unsigned int sz)
 {
        ext = htonl(ext);
        sz = htonl(sz);