ls: add "total NNNN" header if DESKTOP. By Johannes Stezenbach (js AT sig21.net)

function                                             old     new   delta
showdirs                                             492     564     +72

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

1 files changed, 23 insertions, 2 deletions

diff --git a/coreutils/ls.c b/coreutils/ls.c
index 19d38049c..bb6165b39 100644
--- a/coreutils/ls.c
+++ b/coreutils/ls.c
@@ -17,8 +17,7 @@
  * it more portable.
  *
  * KNOWN BUGS:
- * 1. ls -l of a directory doesn't give "total <blocks>" header
- * 2. hidden files can make column width too large
+ * 1. hidden files can make column width too large
  *
  * NON-OPTIMAL BEHAVIOUR:
  * 1. autowidth reads directories twice
@@ -598,6 +597,24 @@ static void showfiles(struct dnode **dn, int nfiles)
 }
 
 
+#if ENABLE_DESKTOP
+static off_t calculate_blocks(struct dnode **dn, int nfiles)
+{
+        uoff_t blocks = 1;
+        while (nfiles) {
+                blocks += (*dn)->dstat.st_blocks; /* in 512 byte blocks */
+                dn++;
+                nfiles--;
+        }
+
+        /* Even though POSIX says use 512 byte blocks, coreutils use 1k */
+        /* Actually, we round up by calculating (blocks + 1) / 2,
+         * "+ 1" was done when we initialized blocks to 1 */
+        return blocks >> 1;
+}
+#endif
+
+
 static void showdirs(struct dnode **dn, int ndirs, int first)
 {
         int i, nfiles;
@@ -617,6 +634,10 @@ static void showdirs(struct dnode **dn, int ndirs, int first)
                 }
                 subdnp = list_dir(dn[i]->fullname);
                 nfiles = countfiles(subdnp);
+#if ENABLE_DESKTOP
+                if (all_fmt & STYLE_LONG)
+                        printf("total %"OFF_FMT"u\n", calculate_blocks(subdnp, nfiles));
+#endif
                 if (nfiles > 0) {
                         /* list all files at this level */
                         dnsort(subdnp, nfiles);