[hackers] [sbase] Three bugfixes in mkdir(1) || FRIGN

[git]

commit 776ead406a4c9e838c6e3427b80bd8210a559e36
Author: FRIGN <d...@frign.de>
Date:   Fri Mar 13 12:15:30 2015 +0100

    Three bugfixes in mkdir(1)
    
    1) Any path passed to mkdir -p beginning with '/' failed, because
       it would cut out the first '/' immediately, passing "" to mkdir.
    2) Running mkdir -p with a path/to/dir without trailing '/' would
       not create the directory.
       This is due to a wrong flag-check I added in the main-loop.
       It should now work as expected.
    3) With the p-flag given, don't report an error in case the last
       dir also exists.

diff --git a/mkdir.c b/mkdir.c
index 470c07e..b0d8bc2 100644
--- a/mkdir.c
+++ b/mkdir.c
@@ -11,7 +11,7 @@ mkdirp(char *path)
 {
        char *p;
 
-       for (p = path; *p; p++) {
+       for (p = path + (*path == '/'); *p; p++) {
                if (*p != '/')
                        continue;
                *p = '\0';
@@ -56,9 +56,11 @@ main(int argc, char *argv[])
        for (; *argv; argc--, argv++) {
                if (pflag && mkdirp(*argv) < 0) {
                        ret = 1;
-               } else if (!pflag && mkdir(*argv, S_IRWXU | S_IRWXG | S_IRWXO) 
< 0) {
-                       weprintf("mkdir %s:", *argv);
-                       ret = 1;
+               } else if (mkdir(*argv, S_IRWXU | S_IRWXG | S_IRWXO) < 0) {
+                       if (!(pflag && errno == EEXIST)) {
+                               weprintf("mkdir %s:", *argv);
+                               ret = 1;
+                       }
                } else if (mflag && chmod(*argv, mode) < 0) {
                        weprintf("chmod %s:", *argv);
                        ret = 1;