Add _PC_CASE_INSENSITIVE flag to pathconf

[Ken Brown]

Patch attached.

I tested it by running getconf.exe, and also as follows:

$ cat case_sens_test.c
#include <unistd.h>
#include <stdio.h>

void
test (const char *path)
{
   int ret = pathconf (path, _PC_CASE_INSENSITIVE);
   printf ("pathconf (\"%s\", _PC_CASE_INSENSITIVE) returns %d\n", path, 
ret);
   if (ret == -1)
     perror ("  pathconf");
}

int
main ()
{
   test ("/tmp");
   test ("/tmp/a");
   test ("/cygdrive/c/cygwin");
   test ("/");
   test (".");
}

$ gcc case_sens_test.c

$ ./a
pathconf ("/tmp", _PC_CASE_INSENSITIVE) returns 0
pathconf ("/tmp/a", _PC_CASE_INSENSITIVE) returns -1
   pathconf: No such file or directory
pathconf ("/cygdrive/c/cygwin", _PC_CASE_INSENSITIVE) returns 1
pathconf ("/", _PC_CASE_INSENSITIVE) returns 0
pathconf (".", _PC_CASE_INSENSITIVE) returns 0

This test was done, obviously, on a system with the obcaseinsensitive 
registry key set to 0, and with /tmp/a non-existent.  I also tested with 
the registry key set to 1, with the expected results.

Ken
-------------- next part --------------
From 04b507edbfbbaade6ef19ba9302ac9a758886995 Mon Sep 17 00:00:00 2001
From: Ken Brown <kbrown@cornell.edu>
Date: Thu, 20 Oct 2016 15:35:54 -0400
Subject: [PATCH] Add _PC_CASE_INSENSITIVE to [f]pathconf

Update the getconf utility to support the new flag as well as
_PC_POSIX_PERMISSIONS and _PC_POSIX_SECURITY.  These were previously
unsupported, probably as an oversight.
---
 newlib/libc/include/sys/unistd.h       | 1 +
 winsup/cygwin/fhandler.cc              | 2 ++
 winsup/cygwin/include/cygwin/version.h | 3 ++-
 winsup/cygwin/release/2.6.1            | 2 ++
 winsup/utils/getconf.c                 | 3 +++
 5 files changed, 10 insertions(+), 1 deletion(-)

diff --git a/newlib/libc/include/sys/unistd.h b/newlib/libc/include/sys/unistd.h
index 05b4f9d..143147d 100644
--- a/newlib/libc/include/sys/unistd.h
+++ b/newlib/libc/include/sys/unistd.h
@@ -490,6 +490,7 @@ int	_EXFUN(unlinkat, (int, const char *, int));
 #define _PC_POSIX_PERMISSIONS            90
 /* Ask for full POSIX permission support including uid/gid settings. */
 #define _PC_POSIX_SECURITY               91
+#define _PC_CASE_INSENSITIVE             92
 #endif
 
 /*
diff --git a/winsup/cygwin/fhandler.cc b/winsup/cygwin/fhandler.cc
index d77ccd3..9ab52ad 100644
--- a/winsup/cygwin/fhandler.cc
+++ b/winsup/cygwin/fhandler.cc
@@ -1891,6 +1891,8 @@ fhandler_base::fpathconf (int v)
 	return pc.has_acls () || pc.fs_is_nfs ();
       set_errno (EINVAL);
       break;
+    case _PC_CASE_INSENSITIVE:
+      return !!pc.objcaseinsensitive ();
     default:
       set_errno (EINVAL);
       break;
diff --git a/winsup/cygwin/include/cygwin/version.h b/winsup/cygwin/include/cygwin/version.h
index 1c1402c..6ba602e 100644
--- a/winsup/cygwin/include/cygwin/version.h
+++ b/winsup/cygwin/include/cygwin/version.h
@@ -469,12 +469,13 @@ details. */
   302: Export nl_langinfo_l.
   303: Export pthread_getname_np, pthread_setname_np.
   304: Export strerror_l, strptime_l, wcsftime_l.
+  305: [f]pathconf flag _PC_CASE_INSENSITIVE added.
 
   Note that we forgot to bump the api for ualarm, strtoll, strtoull,
   sigaltstack, sethostname. */
 
 #define CYGWIN_VERSION_API_MAJOR 0
-#define CYGWIN_VERSION_API_MINOR 304
+#define CYGWIN_VERSION_API_MINOR 305
 
 /* There is also a compatibity version number associated with the shared memory
    regions.  It is incremented when incompatible changes are made to the shared
diff --git a/winsup/cygwin/release/2.6.1 b/winsup/cygwin/release/2.6.1
index 61ce2de..7ced3c4 100644
--- a/winsup/cygwin/release/2.6.1
+++ b/winsup/cygwin/release/2.6.1
@@ -1,6 +1,8 @@
 What's new:
 -----------
 
+- Add _PC_CASE_INSENSITIVE flag to [f]pathconf(3).
+
 
 What changed:
 -------------
diff --git a/winsup/utils/getconf.c b/winsup/utils/getconf.c
index 8539233..e6b319e 100644
--- a/winsup/utils/getconf.c
+++ b/winsup/utils/getconf.c
@@ -186,6 +186,7 @@ static const struct conf_variable conf_table[] =
   { "POSIX2_RE_DUP_MAX",		CONSTANT,	_POSIX2_RE_DUP_MAX	},
 
   /* Variables from fpathconf() */
+  { "CASE_INSENSITIVE",			PATHCONF,	_PC_CASE_INSENSITIVE	},
   { "FILESIZEBITS",			PATHCONF,	_PC_FILESIZEBITS	},
   { "LINK_MAX",				PATHCONF,	_PC_LINK_MAX		},
   { "MAX_CANON",			PATHCONF,	_PC_MAX_CANON		},
@@ -195,10 +196,12 @@ static const struct conf_variable conf_table[] =
   { "PIPE_BUF",				PATHCONF,	_PC_PIPE_BUF		},
   { "POSIX2_SYMLINKS",			PATHCONF,	_PC_2_SYMLINKS		},
   { "POSIX_ALLOC_SIZE_MIN",		PATHCONF,	_PC_ALLOC_SIZE_MIN	},
+  { "POSIX_PERMISSIONS",		PATHCONF,	_PC_POSIX_PERMISSIONS	},
   { "POSIX_REC_INCR_XFER_SIZE",		PATHCONF,	_PC_REC_INCR_XFER_SIZE	},
   { "POSIX_REC_MAX_XFER_SIZE",		PATHCONF,	_PC_REC_MAX_XFER_SIZE	},
   { "POSIX_REC_MIN_XFER_SIZE",		PATHCONF,	_PC_REC_MIN_XFER_SIZE	},
   { "POSIX_REC_XFER_ALIGN",		PATHCONF,	_PC_REC_XFER_ALIGN	},
+  { "POSIX_SECURITY",			PATHCONF,	_PC_POSIX_SECURITY	},
   { "SYMLINK_MAX",			PATHCONF,	_PC_SYMLINK_MAX		},
   { "_POSIX_CHOWN_RESTRICTED",		PATHCONF,	_PC_CHOWN_RESTRICTED	},
   { "_POSIX_NO_TRUNC",			PATHCONF,	_PC_NO_TRUNC		},
-- 
2.8.3