Message-ID:	<397F0384.D88CD100@softhome.net>
Date:	Wed, 26 Jul 2000 17:28:04 +0200
From:	Laurynas Biveinis <lauras AT softhome DOT net>
X-Mailer:	Mozilla 4.73 [en] (Win98; U)
X-Accept-Language:	lt,en
MIME-Version:	1.0
To:	djgpp-workers AT delorie DOT com
Subject:	Re: Patch: lchown()
References:	<395606D5 DOT 1A0F26D AT softhome DOT net> <397C6816 DOT F91EEFD AT softhome DOT net>
Reply-To:	djgpp-workers AT delorie DOT com

I wrote:
> I wrote:
> > this patch adds a doing-nothing lchown(), as
> > a part of upcoming symlink support.
> 
> I haven't received explicit approval in a month. If
> nobody speaks up in a short time (say, a day or two),
> I apply it.

OK, so you've asked for it :)
Here is what I've actually commited.

Also I am thinking about testsuite for both chown and lchown,
how about following:
--8<---8<----
#include <stdio.h>
#include <unistd.h>
#include <errno.h>

int main(void)
{
   if (!lchown("/dev/env/DJDIR/bin/gcc.exe", 1, 2))
      printf("OK! lchown() found existing file.\n");
   else
      perror("lchown failed: ");
   if (lchown("/well/I/dont/think/this/would/exist/anywhere.exe", 2, 1))
   {
      if (errno == ENOENT)
         printf("OK! lchown() failed for non-existing file.\n");
      else
         perror("Huh? lchown() failed with wrong errno: ");
   }
   else
      printf("What? lchown() suceeded for non-existing file?\n");
}
---8<---8<---

Any suggestions for its implementation? Should I just follow the
lead or do you have any ideas currently not implemented in testsuite?

Laurynas



Index: djgpp/include/unistd.h
===================================================================
RCS file: /cvs/djgpp/djgpp/include/unistd.h,v
retrieving revision 1.6
diff -u -r1.6 unistd.h
--- unistd.h	2000/06/19 18:00:55	1.6
+++ unistd.h	2000/07/26 15:11:25
@@ -135,6 +135,7 @@
 int		gethostname(char *buf, int size);
 int		getpagesize(void);
 char *		getwd(char *__buffer);
+int             lchown(const char * file, int owner, int group);
 offset_t	llseek(int _fildes, offset_t _offset, int _whence);
 int		nice(int _increment);
 void *		sbrk(int _delta);
Index: djgpp/src/docs/kb/wc204.txi
===================================================================
RCS file: /cvs/djgpp/djgpp/src/docs/kb/wc204.txi,v
retrieving revision 1.13
diff -u -r1.13 wc204.txi
--- wc204.txi	2000/07/24 15:52:47	1.13
+++ wc204.txi	2000/07/26 15:11:27
@@ -82,3 +82,6 @@
 @findex stpncpy
 New function @code{stpncpy} has been added, thanks to 
 @email{restone@@skypoint.com, Richard E. Stone}.
+
+@findex lchown
+New function @code{lchown} has been added for UNIX compatibility.
Index: djgpp/src/libc/libc.tex
===================================================================
RCS file: /cvs/djgpp/djgpp/src/libc/libc.tex,v
retrieving revision 1.5
diff -u -r1.5 libc.tex
--- libc.tex	1999/11/28 11:20:47	1.5
+++ libc.tex	2000/07/26 15:11:28
@@ -115,6 +115,7 @@
 * getgroups::                Trivial.
 * getpwnam::                 Trivial.
 * getpwuid::                 Trivial.
+* lchown::                   Trivial.
 * mkfifo::                   Always fails.
 * mknod::                    Trivial.
 * nice::                     No-op.
Index: djgpp/src/libc/compat/unistd/lchown.c
===================================================================
RCS file: lchown.c
diff -N lchown.c
--- /dev/null	Tue May  5 16:32:27 1998
+++ lchown.c	Wed Jul 26 11:11:32 2000
@@ -0,0 +1,18 @@
+/* Copyright (C) 2000 DJ Delorie, see COPYING.DJ for details */
+#include <unistd.h>
+#include <errno.h>
+ 
+/* MS-DOS couldn't care less about file ownerships, so we could
+   always succeed.  At least fail for non-existent files
+   and for devices.  */
+ 
+int
+lchown(const char *path, uid_t owner, gid_t group)
+{
+  if (!__file_exists(path))       /* non-existent file */
+  {
+    errno = ENOENT;
+    return -1;
+  }
+  return 0;
+}
Index: djgpp/src/libc/compat/unistd/lchown.txh
===================================================================
RCS file: lchown.txh
diff -N lchown.txh
--- /dev/null	Tue May  5 16:32:27 1998
+++ lchown.txh	Wed Jul 26 11:11:32 2000
@@ -0,0 +1,24 @@
+@node lchown, unix
+@subheading Syntax
+
+@example
+#include <unistd.h>
+
+int lchown(const char *file, int owner, int group);
+@end example
+
+@subheading Description
+
+This function does nothing under MS-DOS
+
+@subheading Return Value
+
+This function always returns zero if the file exists (it does not
+follow symbolic links), else it returns -1 and sets @code{errno} 
+to @code{ENOENT}.
+
+
+@subheading Portability
+
+@portability !ansi, !posix
+
Index: djgpp/src/libc/compat/unistd/makefile
===================================================================
RCS file: /cvs/djgpp/djgpp/src/libc/compat/unistd/makefile,v
retrieving revision 1.3
diff -u -r1.3 makefile
--- makefile	2000/06/19 18:00:56	1.3
+++ makefile	2000/07/26 15:11:32
@@ -10,6 +10,7 @@
 SRC += gethostn.c
 SRC += getpages.c
 SRC += getwd.c
+SRC += lchown.c
 SRC += llseek.c
 SRC += nice.c
 SRC += sync.c

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