Merge branch 'jk/maint-rmdir-fix' into maint-1.6.6
[gitweb.git] / read-cache.c
index 940ec76fdf231ac1345079ca2dc5da88925bcfb6..9033dd3ab938e2ee7b4248ff97645414ee3688db 100644 (file)
@@ -67,8 +67,10 @@ void rename_index_entry_at(struct index_state *istate, int nr, const char *new_n
  */
 void fill_stat_cache_info(struct cache_entry *ce, struct stat *st)
 {
-       ce->ce_ctime = st->st_ctime;
-       ce->ce_mtime = st->st_mtime;
+       ce->ce_ctime.sec = (unsigned int)st->st_ctime;
+       ce->ce_mtime.sec = (unsigned int)st->st_mtime;
+       ce->ce_ctime.nsec = ST_CTIME_NSEC(*st);
+       ce->ce_mtime.nsec = ST_MTIME_NSEC(*st);
        ce->ce_dev = st->st_dev;
        ce->ce_ino = st->st_ino;
        ce->ce_uid = st->st_uid;
@@ -196,11 +198,18 @@ static int ce_match_stat_basic(struct cache_entry *ce, struct stat *st)
        default:
                die("internal error: ce_mode is %o", ce->ce_mode);
        }
-       if (ce->ce_mtime != (unsigned int) st->st_mtime)
+       if (ce->ce_mtime.sec != (unsigned int)st->st_mtime)
                changed |= MTIME_CHANGED;
-       if (trust_ctime && ce->ce_ctime != (unsigned int) st->st_ctime)
+       if (trust_ctime && ce->ce_ctime.sec != (unsigned int)st->st_ctime)
                changed |= CTIME_CHANGED;
 
+#ifdef USE_NSEC
+       if (ce->ce_mtime.nsec != ST_MTIME_NSEC(*st))
+               changed |= MTIME_CHANGED;
+       if (trust_ctime && ce->ce_ctime.nsec != ST_CTIME_NSEC(*st))
+               changed |= CTIME_CHANGED;
+#endif
+
        if (ce->ce_uid != (unsigned int) st->st_uid ||
            ce->ce_gid != (unsigned int) st->st_gid)
                changed |= OWNER_CHANGED;
@@ -232,8 +241,16 @@ static int ce_match_stat_basic(struct cache_entry *ce, struct stat *st)
 static int is_racy_timestamp(const struct index_state *istate, struct cache_entry *ce)
 {
        return (!S_ISGITLINK(ce->ce_mode) &&
-               istate->timestamp &&
-               ((unsigned int)istate->timestamp) <= ce->ce_mtime);
+               istate->timestamp.sec &&
+#ifdef USE_NSEC
+                /* nanosecond timestamped files can also be racy! */
+               (istate->timestamp.sec < ce->ce_mtime.sec ||
+                (istate->timestamp.sec == ce->ce_mtime.sec &&
+                 istate->timestamp.nsec <= ce->ce_mtime.nsec))
+#else
+               istate->timestamp.sec <= ce->ce_mtime.sec
+#endif
+                );
 }
 
 int ie_match_stat(const struct index_state *istate,
@@ -443,6 +460,26 @@ int remove_index_entry_at(struct index_state *istate, int pos)
        return 1;
 }
 
+/*
+ * Remove all cache ententries marked for removal, that is where
+ * CE_REMOVE is set in ce_flags.  This is much more effective than
+ * calling remove_index_entry_at() for each entry to be removed.
+ */
+void remove_marked_cache_entries(struct index_state *istate)
+{
+       struct cache_entry **ce_array = istate->cache;
+       unsigned int i, j;
+
+       for (i = j = 0; i < istate->cache_nr; i++) {
+               if (ce_array[i]->ce_flags & CE_REMOVE)
+                       remove_name_hash(ce_array[i]);
+               else
+                       ce_array[j++] = ce_array[i];
+       }
+       istate->cache_changed = 1;
+       istate->cache_nr = j;
+}
+
 int remove_file_from_index(struct index_state *istate, const char *path)
 {
        int pos = index_name_pos(istate, path, strlen(path));
@@ -601,7 +638,7 @@ int add_file_to_index(struct index_state *istate, const char *path, int flags)
 {
        struct stat st;
        if (lstat(path, &st))
-               die("%s: unable to stat (%s)", path, strerror(errno));
+               die_errno("unable to stat '%s'", path);
        return add_to_index(istate, path, &st, flags);
 }
 
@@ -1028,7 +1065,18 @@ static struct cache_entry *refresh_cache_ent(struct index_state *istate,
        return updated;
 }
 
-int refresh_index(struct index_state *istate, unsigned int flags, const char **pathspec, char *seen)
+static void show_file(const char * fmt, const char * name, int in_porcelain,
+                     int * first, char *header_msg)
+{
+       if (in_porcelain && *first && header_msg) {
+               printf("%s\n", header_msg);
+               *first=0;
+       }
+       printf(fmt, name);
+}
+
+int refresh_index(struct index_state *istate, unsigned int flags, const char **pathspec,
+                 char *seen, char *header_msg)
 {
        int i;
        int has_errors = 0;
@@ -1037,11 +1085,14 @@ int refresh_index(struct index_state *istate, unsigned int flags, const char **p
        int quiet = (flags & REFRESH_QUIET) != 0;
        int not_new = (flags & REFRESH_IGNORE_MISSING) != 0;
        int ignore_submodules = (flags & REFRESH_IGNORE_SUBMODULES) != 0;
+       int first = 1;
+       int in_porcelain = (flags & REFRESH_IN_PORCELAIN);
        unsigned int options = really ? CE_MATCH_IGNORE_VALID : 0;
-       const char *needs_update_message;
+       const char *needs_update_fmt;
+       const char *needs_merge_fmt;
 
-       needs_update_message = ((flags & REFRESH_SAY_CHANGED)
-                               ? "locally modified" : "needs update");
+       needs_update_fmt = (in_porcelain ? "M\t%s\n" : "%s: needs update\n");
+       needs_merge_fmt = (in_porcelain ? "U\t%s\n" : "%s: needs merge\n");
        for (i = 0; i < istate->cache_nr; i++) {
                struct cache_entry *ce, *new;
                int cache_errno = 0;
@@ -1057,7 +1108,7 @@ int refresh_index(struct index_state *istate, unsigned int flags, const char **p
                        i--;
                        if (allow_unmerged)
                                continue;
-                       printf("%s: needs merge\n", ce->name);
+                       show_file(needs_merge_fmt, ce->name, in_porcelain, &first, header_msg);
                        has_errors = 1;
                        continue;
                }
@@ -1080,7 +1131,7 @@ int refresh_index(struct index_state *istate, unsigned int flags, const char **p
                        }
                        if (quiet)
                                continue;
-                       printf("%s: %s\n", ce->name, needs_update_message);
+                       show_file(needs_update_fmt, ce->name, in_porcelain, &first, header_msg);
                        has_errors = 1;
                        continue;
                }
@@ -1139,8 +1190,10 @@ static void convert_from_disk(struct ondisk_cache_entry *ondisk, struct cache_en
        size_t len;
        const char *name;
 
-       ce->ce_ctime = ntohl(ondisk->ctime.sec);
-       ce->ce_mtime = ntohl(ondisk->mtime.sec);
+       ce->ce_ctime.sec = ntohl(ondisk->ctime.sec);
+       ce->ce_mtime.sec = ntohl(ondisk->mtime.sec);
+       ce->ce_ctime.nsec = ntohl(ondisk->ctime.nsec);
+       ce->ce_mtime.nsec = ntohl(ondisk->mtime.nsec);
        ce->ce_dev   = ntohl(ondisk->dev);
        ce->ce_ino   = ntohl(ondisk->ino);
        ce->ce_mode  = ntohl(ondisk->mode);
@@ -1206,16 +1259,17 @@ int read_index_from(struct index_state *istate, const char *path)
                return istate->cache_nr;
 
        errno = ENOENT;
-       istate->timestamp = 0;
+       istate->timestamp.sec = 0;
+       istate->timestamp.nsec = 0;
        fd = open(path, O_RDONLY);
        if (fd < 0) {
                if (errno == ENOENT)
                        return 0;
-               die("index file open failed (%s)", strerror(errno));
+               die_errno("index file open failed");
        }
 
        if (fstat(fd, &st))
-               die("cannot stat the open index (%s)", strerror(errno));
+               die_errno("cannot stat the open index");
 
        errno = EINVAL;
        mmap_size = xsize_t(st.st_size);
@@ -1225,7 +1279,7 @@ int read_index_from(struct index_state *istate, const char *path)
        mmap = xmmap(NULL, mmap_size, PROT_READ | PROT_WRITE, MAP_PRIVATE, fd, 0);
        close(fd);
        if (mmap == MAP_FAILED)
-               die("unable to map index file");
+               die_errno("unable to map index file");
 
        hdr = mmap;
        if (verify_hdr(hdr, mmap_size) < 0)
@@ -1258,7 +1312,9 @@ int read_index_from(struct index_state *istate, const char *path)
                src_offset += ondisk_ce_size(ce);
                dst_offset += ce_size(ce);
        }
-       istate->timestamp = st.st_mtime;
+       istate->timestamp.sec = st.st_mtime;
+       istate->timestamp.nsec = ST_MTIME_NSEC(st);
+
        while (src_offset <= mmap_size - 20 - 8) {
                /* After an array of active_nr index entries,
                 * there can be arbitrary number of extended
@@ -1266,7 +1322,7 @@ int read_index_from(struct index_state *istate, const char *path)
                 * extension name (4-byte) and section length
                 * in 4-byte network byte order.
                 */
-               unsigned long extsize;
+               uint32_t extsize;
                memcpy(&extsize, (char *)mmap + src_offset + 4, 4);
                extsize = ntohl(extsize);
                if (read_index_extension(istate,
@@ -1288,14 +1344,15 @@ int read_index_from(struct index_state *istate, const char *path)
 
 int is_index_unborn(struct index_state *istate)
 {
-       return (!istate->cache_nr && !istate->alloc && !istate->timestamp);
+       return (!istate->cache_nr && !istate->alloc && !istate->timestamp.sec);
 }
 
 int discard_index(struct index_state *istate)
 {
        istate->cache_nr = 0;
        istate->cache_changed = 0;
-       istate->timestamp = 0;
+       istate->timestamp.sec = 0;
+       istate->timestamp.nsec = 0;
        istate->name_hash_initialized = 0;
        free_hash(&istate->name_hash);
        cache_tree_free(&(istate->cache_tree));
@@ -1441,10 +1498,10 @@ static int ce_write_entry(git_SHA_CTX *c, int fd, struct cache_entry *ce)
        struct ondisk_cache_entry *ondisk = xcalloc(1, size);
        char *name;
 
-       ondisk->ctime.sec = htonl(ce->ce_ctime);
-       ondisk->ctime.nsec = 0;
-       ondisk->mtime.sec = htonl(ce->ce_mtime);
-       ondisk->mtime.nsec = 0;
+       ondisk->ctime.sec = htonl(ce->ce_ctime.sec);
+       ondisk->mtime.sec = htonl(ce->ce_mtime.sec);
+       ondisk->ctime.nsec = htonl(ce->ce_ctime.nsec);
+       ondisk->mtime.nsec = htonl(ce->ce_mtime.nsec);
        ondisk->dev  = htonl(ce->ce_dev);
        ondisk->ino  = htonl(ce->ce_ino);
        ondisk->mode = htonl(ce->ce_mode);
@@ -1466,13 +1523,14 @@ static int ce_write_entry(git_SHA_CTX *c, int fd, struct cache_entry *ce)
        return ce_write(c, fd, ondisk, size);
 }
 
-int write_index(const struct index_state *istate, int newfd)
+int write_index(struct index_state *istate, int newfd)
 {
        git_SHA_CTX c;
        struct cache_header hdr;
        int i, err, removed, extended;
        struct cache_entry **cache = istate->cache;
        int entries = istate->cache_nr;
+       struct stat st;
 
        for (i = removed = extended = 0; i < entries; i++) {
                if (cache[i]->ce_flags & CE_REMOVE)
@@ -1516,7 +1574,12 @@ int write_index(const struct index_state *istate, int newfd)
                if (err)
                        return -1;
        }
-       return ce_flush(&c, newfd);
+
+       if (ce_flush(&c, newfd) || fstat(newfd, &st))
+               return -1;
+       istate->timestamp.sec = (unsigned int)st.st_mtime;
+       istate->timestamp.nsec = ST_MTIME_NSEC(st);
+       return 0;
 }
 
 /*