Hi,

attached are two patches, one adds the -m option to mkdir (set permissions
of created directory), the other adds a test script for it. The test script
uses the non-standard command stat since it seems to be the right tool for
determining permissions of directories.

Felix
# HG changeset patch
# User Felix Janda <[email protected]>
# Date 1356276331 -3600
# Node ID 89bee646c1c50346aae576ab9140bc05b1eea879
# Parent  5da97f834a06da1368b20c5dc67ad17ed8339841
Add -m option to mkdir

diff -r 5da97f834a06 -r 89bee646c1c5 toys/posix/mkdir.c
--- a/toys/posix/mkdir.c	Wed Dec 19 09:16:45 2012 -0600
+++ b/toys/posix/mkdir.c	Sun Dec 23 16:25:31 2012 +0100
@@ -4,31 +4,33 @@
  *
  * See http://opengroup.org/onlinepubs/9699919799/utilities/mkdir.html
  *
- * TODO: Add -m
 
-USE_MKDIR(NEWTOY(mkdir, "<1p", TOYFLAG_BIN))
+USE_MKDIR(NEWTOY(mkdir, "<1pm:", TOYFLAG_BIN))
 
 config MKDIR
   bool "mkdir"
   default y
   help
-    usage: mkdir [-p] [dirname...]
+    usage: mkdir [-p] [-m mode] [dirname...]
     Create one or more directories.
 
     -p	make parent directories as needed.
+    -m  set permissions of directory to mode.
 */
 
 #define FOR_mkdir
 #include "toys.h"
 
 GLOBALS(
-  long mode;
+  char *arg_mode;
+  mode_t mode;
 )
 
 static int do_mkdir(char *dir)
 {
   struct stat buf;
   char *s;
+  mode_t mode = 0777;
 
   // mkdir -p one/two/three is not an error if the path already exists,
   // but is if "three" is a file.  The others we dereference and catch
@@ -44,12 +46,16 @@
     char save=0;
 
     // Skip leading / of absolute paths.
-    if (s!=dir && *s == '/' && toys.optflags) {
+    if (s!=dir && *s == '/' && (toys.optflags&FLAG_p)) {
       save = *s;
       *s = 0;
     } else if (*s) continue;
 
-    if (mkdir(dir, TT.mode)<0 && (!toys.optflags || errno != EEXIST))
+    // Use the mode from the -m option only for the last directory.
+    if ((toys.optflags&FLAG_m) && save != '/')
+      mode = TT.mode;
+
+    if (mkdir(dir, mode)<0 && ((toys.optflags&~FLAG_p) || errno != EEXIST))
       return 1;
 
     if (!(*s = save)) break;
@@ -63,6 +69,8 @@
   char **s;
 
   TT.mode = 0777;
+  if(toys.optflags&FLAG_m)
+    TT.mode = string_to_mode(TT.arg_mode, TT.mode);
 
   for (s=toys.optargs; *s; s++) {
     if (do_mkdir(*s)) {
# HG changeset patch
# User Felix Janda <[email protected]>
# Date 1356281075 -3600
# Node ID 0ea9c498ac859d0d271b538a6cfb56e714704e33
# Parent  89bee646c1c50346aae576ab9140bc05b1eea879
Add some tests for mkdir

diff -r 89bee646c1c5 -r 0ea9c498ac85 scripts/test/mkdir.test
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/scripts/test/mkdir.test	Sun Dec 23 17:44:35 2012 +0100
@@ -0,0 +1,44 @@
+#!/bin/bash
+
+[ -f testing.sh ] && . testing.sh
+
+#testing "name" "command" "result" "infile" "stdin"
+
+testing "mkdir" "mkdir one && [ -d one ] && echo yes" "yes\n" "" ""
+rmdir one
+
+touch existing
+testing "mkdir existing" \
+	"mkdir existing 2> /dev/null || [ -f existing ] && echo yes" "yes\n" "" ""
+rm existing
+
+testing "mkdir one two" \
+	"mkdir one two && [ -d one ] && [ -d two ] && echo yes" "yes\n" "" ""
+rmdir one two
+
+testing "mkdir missing/one" \
+	"mkdir missing/one 2> /dev/null || [ ! -d missing ] && echo yes" "yes\n" "" ""
+
+testing "mkdir -p" \
+	"mkdir -p one/two/three && [ -d one/two/three ] && echo yes" "yes\n" "" ""
+rm -rf one
+
+mkdir existing
+testing "mkdir -p existing" "mkdir -p existing && echo yes" "yes\n" "" ""
+rmdir existing
+
+umask 123
+testing "mkdir (default permissions)" \
+	"mkdir one && stat -c %a one" "654\n" "" ""
+rmdir one
+
+umask 000
+
+testing "mkdir -m 124" \
+	"mkdir -m 124 one && stat -c %a one" "124\n" "" ""
+rmdir one
+
+testing "mkdir -p -m 653" \
+	"mkdir -p -m 653 one/two && stat -c %a one && stat -c %a one/two" \
+	"777\n653\n" "" ""
+rm -rf one
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