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* newlib/libc/include/sys/unistd.h: Add prototypes for

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fchmod, fchown, lchown.
        * winsup/cygwin/syscalls.cc (chown_worker): Use previous
        uid/gid if new uid/gid is -1.
        New static function with chown functionality.
        (chown): Call chown_worker with SYMLINK_FOLLOW.
        (fchown): New function. Call chown_worker with SYMLINK_FOLLOW.
        (lchown): New function. Call chown_worker with SYMLINK_IGNORE.
        * cygwin.din: Add symbols for fchown, lchown.
        * path.cc (symlink): Call `set_file_attribute()' and
        `SetFileAttributeA()' instead of `chmod()' to set
        uid/gid correct.
This commit is contained in:
Corinna Vinschen
2000-04-02 20:42:42 +00:00
parent c90d7012d3
commit 796e3b20bc
6 changed files with 96 additions and 18 deletions
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77
winsup/cygwin/syscalls.cc
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@@ -641,22 +641,20 @@ rel2abssd (PSECURITY_DESCRIPTOR psd_rel, PSECURITY_DESCRIPTOR psd_abs,
/*
* chown() is only implemented for Windows NT. Under other operating
* systems, it is only a stub that always returns zero.
*
* Note: the SetFileSecurity API in NT can only set the current
* user as file owner so we have to use the Backup API instead.
*/
extern "C"
int
chown (const char * name, uid_t uid, gid_t gid)
static int
chown_worker (const char *name, symlink_follow fmode, uid_t uid, gid_t gid)
{
int res;
uid_t old_uid;
gid_t old_gid;
if (os_being_run != winNT) // real chown only works on NT
res = 0; // return zero (and do nothing) under Windows 9x
else
{
/* we need Win32 path names because of usage of Win32 API functions */
path_conv win32_path (name);
path_conv win32_path (name, fmode);
if (win32_path.error)
{
@@ -676,17 +674,22 @@ chown (const char * name, uid_t uid, gid_t gid)
DWORD attrib = 0;
if (win32_path.file_attributes () & FILE_ATTRIBUTE_DIRECTORY)
attrib |= S_IFDIR;
int has_acls;
has_acls = allow_ntsec && win32_path.has_acls ();
res = get_file_attribute (has_acls,
res = get_file_attribute (win32_path.has_acls (),
win32_path.get_win32 (),
(int *) &attrib);
(int *) &attrib,
&old_uid,
&old_gid);
if (!res)
res = set_file_attribute (win32_path.has_acls (),
win32_path.get_win32 (),
uid, gid, attrib,
myself->logsrv);
{
if (uid == (uid_t) -1)
uid = old_uid;
if (gid == (gid_t) -1)
gid = old_gid;
res = set_file_attribute (win32_path.has_acls (),
win32_path.get_win32 (),
uid, gid, attrib,
myself->logsrv);
}
if (res != 0 && get_errno () == ENOSYS)
{
/* fake - if not supported, pretend we're like win95
@@ -696,10 +699,50 @@ chown (const char * name, uid_t uid, gid_t gid)
}
done:
syscall_printf ("%d = chown (%s,...)", res, name);
syscall_printf ("%d = %schown (%s,...)",
res, fmode == SYMLINK_IGNORE ? "l" : "", name);
return res;
}
extern "C"
int
chown (const char * name, uid_t uid, gid_t gid)
{
return chown_worker (name, SYMLINK_FOLLOW, uid, gid);
}
extern "C"
int
lchown (const char * name, uid_t uid, gid_t gid)
{
return chown_worker (name, SYMLINK_IGNORE, uid, gid);
}
extern "C"
int
fchown (int fd, uid_t uid, gid_t gid)
{
if (dtable.not_open (fd))
{
syscall_printf ("-1 = fchown (%d,...)", fd);
set_errno (EBADF);
return -1;
}
const char *path = dtable[fd]->get_name ();
if (path == NULL)
{
syscall_printf ("-1 = fchown (%d,...) (no name)", fd);
set_errno (ENOSYS);
return -1;
}
syscall_printf ("fchown (%d,...): calling chown_worker (%s,FOLLOW,...)",
fd, path);
return chown_worker (path, SYMLINK_FOLLOW, uid, gid);
}
/* umask: POSIX 5.3.3.1 */
extern "C"
mode_t