I am trying to change unknown uid's and gid's on files that my rsync command would consider as source files before I execute my rsync command.
My rsync command includes an exclude file.
The reason that I need to do this is explained in my question here.
I have tried this find command:
find /cygdrive/f -uid 4294967295 -exec chown 544. '{}' + -o -gid 4294967295 -exec chown .197121 '{}' +
BUT, it does not handle the exclude file. By that I mean, the above find searches all of f drive for files matching the unknown uid/gid, then chowns them. My rsync looks at drive f and copies all of it except the files in exclude file. I do not want to chown any Win7 side files that rsync does not copy.
For instance, one of the ways Win7 protects some of its hidden/sys files is by setting their uid and gid to 4294967295 (eg c:\pagefil.sys and c:\hiberfil.sys). I have excluded both these files in the rsync exclude file AND I want to leave their Win7 side uid/gid alone. The find command would chown them.
I have also tried to parse an ls listing, which may work, but very slowly. Since I am only dealing with Win7 files I think an ls would be suitable for parsing.
Is there a better way to solve my problem before I work with the ls listing (or parse the find output) before chowning script?
Another, more precise way, but slow and requiring a more difficult script for me, would be to parse an rsync --dry-run ... listing to figure out which items need chowning.
EDIT 2015-12-13: Unfortunately the rsync --dry-run ... does not generate the warnings about impossible to set UID/GID 's during the dry run so that method is out.
BUT, I have found the source code for rsync and it looks to me that it would be pretty easy to modify it so that the UID/GID 's could be set to the UID and GID of the process running the rsync command if the bad UID/GID 's are found during a session.
Can anyone give me a summary of what tools I need to compile the rsync source code on a Win7 computer?
Here is rsync.c from the source code (search for 'impossible to set'):
int set_file_attrs(const char *fname, struct file_struct *file, stat_x *sxp,
const char *fnamecmp, int flags)
{
int updated = 0;
stat_x sx2;
int change_uid, change_gid;
mode_t new_mode = file->mode;
int inherit;
if (!sxp) {
if (dry_run)
return 1;
if (link_stat(fname, &sx2.st, 0) < 0) {
rsyserr(FERROR_XFER, errno, "stat %s failed",
full_fname(fname));
return 0;
}
init_stat_x(&sx2);
sxp = &sx2;
inherit = !preserve_perms;
} else
inherit = !preserve_perms && file->flags & FLAG_DIR_CREATED;
if (inherit && S_ISDIR(new_mode) && sxp->st.st_mode & S_ISGID) {
/* We just created this directory and its setgid
* bit is on, so make sure it stays on. */
new_mode |= S_ISGID;
}
if (daemon_chmod_modes && !S_ISLNK(new_mode))
new_mode = tweak_mode(new_mode, daemon_chmod_modes);
#ifdef SUPPORT_ACLS
if (preserve_acls && !S_ISLNK(file->mode) && !ACL_READY(*sxp))
get_acl(fname, sxp);
#endif
change_uid = am_root && uid_ndx && sxp->st.st_uid != (uid_t)F_OWNER(file);
change_gid = gid_ndx && !(file->flags & FLAG_SKIP_GROUP)
&& sxp->st.st_gid != (gid_t)F_GROUP(file);
#ifndef CAN_CHOWN_SYMLINK
if (S_ISLNK(sxp->st.st_mode)) {
;
} else
#endif
if (change_uid || change_gid) {
if (DEBUG_GTE(OWN, 1)) {
if (change_uid) {
rprintf(FINFO,
"set uid of %s from %u to %u\n",
fname, (unsigned)sxp->st.st_uid, F_OWNER(file));
}
if (change_gid) {
rprintf(FINFO,
"set gid of %s from %u to %u\n",
fname, (unsigned)sxp->st.st_gid, F_GROUP(file));
}
}
if (am_root >= 0) {
uid_t uid = change_uid ? (uid_t)F_OWNER(file) : sxp->st.st_uid;
gid_t gid = change_gid ? (gid_t)F_GROUP(file) : sxp->st.st_gid;
if (do_lchown(fname, uid, gid) != 0) {
/* We shouldn't have attempted to change uid
* or gid unless have the privilege. */
rsyserr(FERROR_XFER, errno, "%s %s failed",
change_uid ? "chown" : "chgrp",
full_fname(fname));
goto cleanup;
}
if (uid == (uid_t)-1 && sxp->st.st_uid != (uid_t)-1)
rprintf(FERROR_XFER, "uid 4294967295 (-1) is impossible to set on %s\n", full_fname(fname));
if (gid == (gid_t)-1 && sxp->st.st_gid != (gid_t)-1)
rprintf(FERROR_XFER, "gid 4294967295 (-1) is impossible to set on %s\n", full_fname(fname));
/* A lchown had been done, so we need to re-stat if
* the destination had the setuid or setgid bits set
* (due to the side effect of the chown call). */
if (sxp->st.st_mode & (S_ISUID | S_ISGID)) {
link_stat(fname, &sxp->st,
keep_dirlinks && S_ISDIR(sxp->st.st_mode));
}
}
updated = 1;
}
#ifdef SUPPORT_XATTRS
if (am_root < 0)
set_stat_xattr(fname, file, new_mode);
if (preserve_xattrs && fnamecmp)
set_xattr(fname, file, fnamecmp, sxp);
#endif
if (!preserve_times
|| (!(preserve_times & PRESERVE_DIR_TIMES) && S_ISDIR(sxp->st.st_mode))
|| (!(preserve_times & PRESERVE_LINK_TIMES) && S_ISLNK(sxp->st.st_mode)))
flags |= ATTRS_SKIP_MTIME;
if (!(flags & ATTRS_SKIP_MTIME)
&& cmp_time(sxp->st.st_mtime, file->modtime) != 0) {
int ret = set_modtime(fname, file->modtime, F_MOD_NSEC(file), sxp->st.st_mode);
if (ret < 0) {
rsyserr(FERROR_XFER, errno, "failed to set times on %s",
full_fname(fname));
goto cleanup;
}
if (ret == 0) /* ret == 1 if symlink could not be set */
updated = 1;
else
file->flags |= FLAG_TIME_FAILED;
}
#ifdef SUPPORT_ACLS
/* It's OK to call set_acl() now, even for a dir, as the generator
* will enable owner-writability using chmod, if necessary.
*
* If set_acl() changes permission bits in the process of setting
* an access ACL, it changes sxp->st.st_mode so we know whether we
* need to chmod(). */
if (preserve_acls && !S_ISLNK(new_mode)) {
if (set_acl(fname, file, sxp, new_mode) > 0)
updated = 1;
}
#endif
#ifdef HAVE_CHMOD
if (!BITS_EQUAL(sxp->st.st_mode, new_mode, CHMOD_BITS)) {
int ret = am_root < 0 ? 0 : do_chmod(fname, new_mode);
if (ret < 0) {
rsyserr(FERROR_XFER, errno,
"failed to set permissions on %s",
full_fname(fname));
goto cleanup;
}
if (ret == 0) /* ret == 1 if symlink could not be set */
updated = 1;
}
#endif
if (INFO_GTE(NAME, 2) && flags & ATTRS_REPORT) {
if (updated)
rprintf(FCLIENT, "%s\n", fname);
else
rprintf(FCLIENT, "%s is uptodate\n", fname);
}
cleanup:
if (sxp == &sx2)
free_stat_x(&sx2);
return updated;
}
