[hackers] [sbase] Add -s support for du(1) || sin

[git]

commit 6e8b79ebd8186be3e955bb26877f72f45292edf7
Author: sin <s...@2f30.org>
Date:   Wed Oct 16 17:54:29 2013 +0100

    Add -s support for du(1)

diff --git a/du.1 b/du.1
index a5046e1..932e693 100644
--- a/du.1
+++ b/du.1
@@ -16,3 +16,6 @@ directory is displayed.
 .TP
 .BI \-a
 Display an entry for each file in the file hierarchy.
+.TP
+.BI \-s
+Display only the grand total for the specified files.
diff --git a/du.c b/du.c
index bfb40e6..3c6461b 100644
--- a/du.c
+++ b/du.c
@@ -14,8 +14,10 @@
 static long blksize = 512;
 
 static bool aflag = false;
+static bool sflag = false;
 
 static long du(const char *);
+static void print(long n, char *path);
 
 void
 usage(void)
@@ -27,11 +29,15 @@ int
 main(int argc, char *argv[])
 {
        char *bsize;
+       long n;
 
        ARGBEGIN {
        case 'a':
                aflag = true;
                break;
+       case 's':
+               sflag = true;
+               break;
        default:
                usage();
        } ARGEND;
@@ -41,10 +47,15 @@ main(int argc, char *argv[])
                blksize = estrtol(bsize, 0);
 
        if (argc < 1) {
-               du(".");
+               n = du(".");
+               if (sflag)
+                       print(n, realpath(".", NULL));
        } else {
-               for (; argc > 0; argc--, argv++)
-                       du(argv[0]);
+               for (; argc > 0; argc--, argv++) {
+                       n = du(argv[0]);
+                       if (sflag)
+                               print(n, realpath(argv[0], NULL));
+               }
        }
        return EXIT_SUCCESS;
 }
@@ -106,7 +117,7 @@ du(const char *path)
                                } else {
                                        m = 512 * st.st_blocks / blksize;
                                        n += m;
-                                       if (aflag)
+                                       if (aflag && !sflag)
                                                print(m, realpath(dent->d_name, 
NULL));
                                }
                        }
@@ -115,6 +126,7 @@ du(const char *path)
                }
        }
 
-       print(n, realpath(path, NULL));
+       if (!sflag)
+               print(n, realpath(path, NULL));
        return n;
 }