[hackers] [sbase] No need for realpath() to call malloc() in du(1) || sin

[git]

commit 9e321b69d2a4f2af1e067c1f58a0c8237e47a248
Author: sin <s...@2f30.org>
Date:   Thu Oct 17 14:06:17 2013 +0100

    No need for realpath() to call malloc() in du(1)
    
    Print links correctly as well.

diff --git a/du.c b/du.c
index edb2e50..b83aba9 100644
--- a/du.c
+++ b/du.c
@@ -12,6 +12,7 @@
 #include "util.h"
 
 static long blksize = 512;
+static char file[PATH_MAX];
 
 static bool aflag = false;
 static bool sflag = false;
@@ -59,12 +60,12 @@ main(int argc, char *argv[])
        if (argc < 1) {
                n = du(".");
                if (sflag)
-                       print(n, realpath(".", NULL));
+                       print(n, realpath(".", file));
        } else {
                for (; argc > 0; argc--, argv++) {
                        n = du(argv[0]);
                        if (sflag)
-                               print(n, realpath(argv[0], NULL));
+                               print(n, realpath(argv[0], file));
                }
        }
        return EXIT_SUCCESS;
@@ -74,7 +75,6 @@ static void
 print(long n, char *path)
 {
        printf("%lu     %s
", n, path);
-       free(path);
 }
 
 static char *
@@ -127,8 +127,13 @@ du(const char *path)
                                } else {
                                        m = 512 * st.st_blocks / blksize;
                                        n += m;
-                                       if (aflag && !sflag)
-                                               print(m, realpath(dent->d_name, 
NULL));
+                                       if (aflag && !sflag) {
+                                               if (S_ISLNK(st.st_mode))
+                                                       snprintf(file, 
sizeof(file), "%s/%s", cwd, dent->d_name);
+                                               else
+                                                       realpath(dent->d_name, 
file);
+                                               print(m, file);
+                                       }
                                }
                        }
                        pop(cwd);
@@ -137,6 +142,6 @@ du(const char *path)
        }
 
        if (!sflag)
-               print(n, realpath(path, NULL));
+               print(n, realpath(path, file));
        return n;
 }