From 314dc6881f0439478f483d26726c52c1c3f536ff Mon Sep 17 00:00:00 2001
From: Rob Landley <rob@landley.net>
Date: Thu, 5 Sep 2013 04:28:40 -0500
Subject: Make chdir handle permissions according to posix, reported by Jacek
 Bukarewicz..

---
 scripts/test/mkdir.test | 20 ++++++++++++++++++--
 toys/posix/mkdir.c      |  9 +++++----
 2 files changed, 23 insertions(+), 6 deletions(-)

diff --git a/scripts/test/mkdir.test b/scripts/test/mkdir.test
index 035d6132..cbd425d4 100644
--- a/scripts/test/mkdir.test
+++ b/scripts/test/mkdir.test
@@ -32,13 +32,29 @@ 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
 
+umask 000
 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
+
+testing "mkdir -p one/two/ (trailing slash)" \
+	"mkdir -p one/two/ &&  [ -d one/two ] && echo yes" "yes\n" "" ""
+rm -rf one
+
+umask 022
+testing "mkdir -p -m 777 (022 umask)" \
+	"mkdir -p -m 777 one/two && stat -c %a one && stat -c %a one/two" \
+	"755\n777\n" "" ""
+rm -rf one
+
+umask 377
+testing "mkdir -p -m 777 (377 umask)" \
+	"mkdir -p -m 777 one/two && stat -c %a one && stat -c %a one/two" \
+	"700\n777\n" "" ""
+umask 002
+rm -rf one
diff --git a/toys/posix/mkdir.c b/toys/posix/mkdir.c
index 24930f4a..202eaa79 100644
--- a/toys/posix/mkdir.c
+++ b/toys/posix/mkdir.c
@@ -4,7 +4,7 @@
  *
  * See http://opengroup.org/onlinepubs/9699919799/utilities/mkdir.html
 
-USE_MKDIR(NEWTOY(mkdir, "<1pm:", TOYFLAG_BIN))
+USE_MKDIR(NEWTOY(mkdir, "<1pm:", TOYFLAG_BIN|TOYFLAG_UMASK))
 
 config MKDIR
   bool "mkdir"
@@ -30,7 +30,6 @@ 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
@@ -44,6 +43,7 @@ static int do_mkdir(char *dir)
 
   for (s=dir; ; s++) {
     char save=0;
+    mode_t mode = 0777&~toys.old_umask;
 
     // Skip leading / of absolute paths.
     if (s!=dir && *s == '/' && (toys.optflags&FLAG_p)) {
@@ -52,9 +52,10 @@ static int do_mkdir(char *dir)
     } else if (*s) continue;
 
     // Use the mode from the -m option only for the last directory.
-    if ((toys.optflags&FLAG_m) && save != '/') mode = TT.mode;
+    if (save == '/') mode |= 0300;
+    else if (toys.optflags&FLAG_m) mode = TT.mode;
 
-    if (mkdir(dir, mode)<0 && ((toys.optflags&~FLAG_p) || errno != EEXIST))
+    if (mkdir(dir, mode)<0 && (!(toys.optflags&FLAG_p) || errno != EEXIST))
       return 1;
 
     if (!(*s = save)) break;
-- 
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