OpenSolaris_b135/lib/libcmdutils/common/process_xattrs.c
/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License (the "License").
* You may not use this file except in compliance with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright 2008 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
#pragma ident "%Z%%M% %I% %E% SMI"
#include "libcmdutils.h"
/*
* Gets file descriptors of attribute directories for source and target
* attribute files
*/
int
get_attrdirs(int indfd, int outdfd, char *attrfile, int *sfd, int *tfd)
{
int pwdfd;
int fd1;
int fd2;
pwdfd = open(".", O_RDONLY);
if ((pwdfd != -1) && (fchdir(indfd) == 0)) {
if ((fd1 = attropen(attrfile, ".", O_RDONLY)) == -1) {
(void) fchdir(pwdfd);
(void) close(pwdfd);
return (1);
}
*sfd = fd1;
} else {
(void) fchdir(pwdfd);
(void) close(pwdfd);
return (1);
}
if (fchdir(outdfd) == 0) {
if ((fd2 = attropen(attrfile, ".", O_RDONLY)) == -1) {
(void) fchdir(pwdfd);
(void) close(pwdfd);
return (1);
}
*tfd = fd2;
} else {
(void) fchdir(pwdfd);
(void) close(pwdfd);
return (1);
}
(void) fchdir(pwdfd);
return (0);
}
/*
* mv_xattrs - Copies the content of the extended attribute files. Then
* moves the extended system attributes from the input attribute files
* to the target attribute files. Moves the extended system attributes
* from source to the target file. This function returns 0 on success
* and nonzero on error.
*/
int
mv_xattrs(char *cmd, char *infile, char *outfile, int sattr, int silent)
{
int srcfd = -1;
int indfd = -1;
int outdfd = -1;
int tmpfd = -1;
int sattrfd = -1;
int tattrfd = -1;
int asfd = -1;
int atfd = -1;
DIR *dirp = NULL;
struct dirent *dp = NULL;
char *etext = NULL;
struct stat st1;
struct stat st2;
nvlist_t *response = NULL;
nvlist_t *res = NULL;
if ((srcfd = open(infile, O_RDONLY)) == -1) {
etext = dgettext(TEXT_DOMAIN, "cannot open source");
goto error;
}
if (sattr)
response = sysattr_list(cmd, srcfd, infile);
if ((indfd = openat(srcfd, ".", O_RDONLY|O_XATTR)) == -1) {
etext = dgettext(TEXT_DOMAIN, "cannot openat source");
goto error;
}
if ((outdfd = attropen(outfile, ".", O_RDONLY)) == -1) {
etext = dgettext(TEXT_DOMAIN, "cannot attropen target");
goto error;
}
if ((tmpfd = dup(indfd)) == -1) {
etext = dgettext(TEXT_DOMAIN, "cannot dup descriptor");
goto error;
}
if ((dirp = fdopendir(tmpfd)) == NULL) {
etext = dgettext(TEXT_DOMAIN, "cannot access source");
goto error;
}
while ((dp = readdir(dirp)) != NULL) {
if ((dp->d_name[0] == '.' && dp->d_name[1] == '\0') ||
(dp->d_name[0] == '.' && dp->d_name[1] == '.' &&
dp->d_name[2] == '\0') ||
(sysattr_type(dp->d_name) == _RO_SATTR) ||
(sysattr_type(dp->d_name) == _RW_SATTR))
continue;
if ((sattrfd = openat(indfd, dp->d_name,
O_RDONLY)) == -1) {
etext = dgettext(TEXT_DOMAIN,
"cannot open src attribute file");
goto error;
}
if (fstat(sattrfd, &st1) < 0) {
etext = dgettext(TEXT_DOMAIN,
"could not stat attribute file");
goto error;
}
if ((tattrfd = openat(outdfd, dp->d_name,
O_RDWR|O_CREAT|O_TRUNC, st1.st_mode)) == -1) {
etext = dgettext(TEXT_DOMAIN,
"cannot open target attribute file");
goto error;
}
if (fstat(tattrfd, &st2) < 0) {
etext = dgettext(TEXT_DOMAIN,
"could not stat attribute file");
goto error;
}
if (writefile(sattrfd, tattrfd, infile, outfile, dp->d_name,
dp->d_name, &st1, &st2) != 0) {
etext = dgettext(TEXT_DOMAIN,
"failed to copy extended attribute "
"from source to target");
goto error;
}
errno = 0;
if (sattr) {
/*
* Gets non default extended system attributes from
* source to copy to target.
*/
if (dp->d_name != NULL)
res = sysattr_list(cmd, sattrfd, dp->d_name);
if (res != NULL &&
get_attrdirs(indfd, outdfd, dp->d_name, &asfd,
&atfd) != 0) {
etext = dgettext(TEXT_DOMAIN,
"Failed to open attribute files");
goto error;
}
/*
* Copy extended system attribute from source
* attribute file to target attribute file
*/
if (res != NULL &&
(renameat(asfd, VIEW_READWRITE, atfd,
VIEW_READWRITE) != 0)) {
if (errno == EPERM)
etext = dgettext(TEXT_DOMAIN,
"Permission denied -"
"failed to move system attribute");
else
etext = dgettext(TEXT_DOMAIN,
"failed to move extended "
"system attribute");
goto error;
}
}
if (sattrfd != -1)
(void) close(sattrfd);
if (tattrfd != -1)
(void) close(tattrfd);
if (asfd != -1)
(void) close(asfd);
if (atfd != -1)
(void) close(atfd);
if (res != NULL) {
nvlist_free(res);
res = NULL;
}
}
errno = 0;
/* Copy extended system attribute from source to target */
if (response != NULL) {
if (renameat(indfd, VIEW_READWRITE, outdfd,
VIEW_READWRITE) == 0)
goto done;
if (errno == EPERM)
etext = dgettext(TEXT_DOMAIN, "Permission denied");
else
etext = dgettext(TEXT_DOMAIN,
"failed to move system attribute");
}
error:
if (res != NULL)
nvlist_free(res);
if (silent == 0 && etext != NULL) {
if (!sattr)
(void) fprintf(stderr, dgettext(TEXT_DOMAIN,
"%s: %s: cannot move extended attributes, "),
cmd, infile);
else
(void) fprintf(stderr, dgettext(TEXT_DOMAIN,
"%s: %s: cannot move extended system "
"attributes, "), cmd, infile);
perror(etext);
}
done:
if (dirp)
(void) closedir(dirp);
if (sattrfd != -1)
(void) close(sattrfd);
if (tattrfd != -1)
(void) close(tattrfd);
if (asfd != -1)
(void) close(asfd);
if (atfd != -1)
(void) close(atfd);
if (indfd != -1)
(void) close(indfd);
if (outdfd != -1)
(void) close(outdfd);
if (response != NULL)
nvlist_free(response);
if (etext != NULL)
return (1);
else
return (0);
}
/*
* The function returns non default extended system attribute list
* associated with 'fname' and returns NULL when an error has occured
* or when only extended system attributes other than archive,
* av_modified or crtime are set.
*
* The function returns system attribute list for the following cases:
*
* - any extended system attribute other than the default attributes
* ('archive', 'av_modified' and 'crtime') is set
* - nvlist has NULL name string
* - nvpair has data type of 'nvlist'
* - default data type.
*/
nvlist_t *
sysattr_list(char *cmd, int fd, char *fname)
{
boolean_t value;
data_type_t type;
nvlist_t *response;
nvpair_t *pair;
f_attr_t fattr;
char *name;
if (fgetattr(fd, XATTR_VIEW_READWRITE, &response) != 0) {
(void) fprintf(stderr, dgettext(TEXT_DOMAIN,
"%s: %s: fgetattr failed\n"),
cmd, fname);
return (NULL);
}
pair = NULL;
while ((pair = nvlist_next_nvpair(response, pair)) != NULL) {
name = nvpair_name(pair);
if (name != NULL)
fattr = name_to_attr(name);
else
return (response);
type = nvpair_type(pair);
switch (type) {
case DATA_TYPE_BOOLEAN_VALUE:
if (nvpair_value_boolean_value(pair,
&value) != 0) {
(void) fprintf(stderr,
dgettext(TEXT_DOMAIN, "%s "
"nvpair_value_boolean_value "
"failed\n"), cmd);
continue;
}
if (value && fattr != F_ARCHIVE &&
fattr != F_AV_MODIFIED)
return (response);
break;
case DATA_TYPE_UINT64_ARRAY:
if (fattr != F_CRTIME)
return (response);
break;
case DATA_TYPE_NVLIST:
default:
return (response);
break;
}
}
if (response != NULL)
nvlist_free(response);
return (NULL);
}