int rpmfiCompareIndex(rpmfi afi, int aix, rpmfi bfi, int bix)
{
mode_t amode = rpmfiFModeIndex(afi, aix);
mode_t bmode = rpmfiFModeIndex(bfi, bix);
rpmFileTypes awhat = rpmfiWhatis(amode);
if ((rpmfiFFlagsIndex(afi, aix) & RPMFILE_GHOST) ||
(rpmfiFFlagsIndex(bfi, bix) & RPMFILE_GHOST)) return 0;
/* Mode difference is a conflict, except for symlinks */
if (!(awhat == LINK && rpmfiWhatis(bmode) == LINK) && amode != bmode)
return 1;
if (awhat == LINK || awhat == REG) {
if (rpmfiFSizeIndex(afi, aix) != rpmfiFSizeIndex(bfi, bix))
return 1;
}
if (!rstreq(rpmfiFUserIndex(afi, aix), rpmfiFUserIndex(bfi, bix)))
return 1;
if (!rstreq(rpmfiFGroupIndex(afi, aix), rpmfiFGroupIndex(bfi, bix)))
return 1;
if (awhat == LINK) {
const char * alink = rpmfiFLinkIndex(afi, aix);
const char * blink = rpmfiFLinkIndex(bfi, bix);
if (alink == blink) return 0;
if (alink == NULL) return 1;
if (blink == NULL) return -1;
return strcmp(alink, blink);
} else if (awhat == REG) {
size_t adiglen, bdiglen;
int aalgo, balgo;
const unsigned char * adigest, * bdigest;
adigest = rpmfiFDigestIndex(afi, aix, &aalgo, &adiglen);
bdigest = rpmfiFDigestIndex(bfi, bix, &balgo, &bdiglen);
if (adigest == bdigest) return 0;
if (adigest == NULL) return 1;
if (bdigest == NULL) return -1;
/* can't meaningfully compare different hash types */
if (aalgo != balgo || adiglen != bdiglen) return -1;
return memcmp(adigest, bdigest, adiglen);
} else if (awhat == CDEV || awhat == BDEV) {
if (rpmfiFRdevIndex(afi, aix) != rpmfiFRdevIndex(bfi, bix))
return 1;
}
return 0;
}
int rpmfiConfigConflictIndex(rpmfi fi, int ix)
{
const char * fn = rpmfiFNIndex(fi, ix);
rpmfileAttrs flags = rpmfiFFlagsIndex(fi, ix);
char buffer[1024];
rpmFileTypes newWhat, diskWhat;
struct stat sb;
if (!(flags & RPMFILE_CONFIG) || lstat(fn, &sb)) {
return 0;
}
diskWhat = rpmfiWhatis((rpm_mode_t)sb.st_mode);
newWhat = rpmfiWhatis(rpmfiFModeIndex(fi, ix));
if (newWhat != LINK && newWhat != REG)
return 1;
if (diskWhat != newWhat)
return 1;
memset(buffer, 0, sizeof(buffer));
if (newWhat == REG) {
int algo;
size_t diglen;
const unsigned char *ndigest = rpmfiFDigestIndex(fi,ix, &algo, &diglen);
if (rpmDoDigest(algo, fn, 0, (unsigned char *)buffer, NULL))
return 0; /* assume file has been removed */
if (ndigest && !memcmp(ndigest, buffer, diglen))
return 0; /* unmodified config file */
} else /* newWhat == LINK */ {
const char * nFLink;
ssize_t link_len = readlink(fn, buffer, sizeof(buffer) - 1);
if (link_len == -1)
return 0; /* assume file has been removed */
buffer[link_len] = '\0';
nFLink = rpmfiFLinkIndex(fi, ix);
if (nFLink && rstreq(nFLink, buffer))
return 0; /* unmodified config file */
}
return 1;
}
rpmFileAction rpmfiDecideFateIndex(rpmfi ofi, int oix, rpmfi nfi, int nix,
int skipMissing)
{
const char * fn = rpmfiFNIndex(nfi, nix);
rpmfileAttrs newFlags = rpmfiFFlagsIndex(nfi, nix);
char buffer[1024];
rpmFileTypes dbWhat, newWhat, diskWhat;
struct stat sb;
int save = (newFlags & RPMFILE_NOREPLACE) ? FA_ALTNAME : FA_SAVE;
if (lstat(fn, &sb)) {
/*
* The file doesn't exist on the disk. Create it unless the new
* package has marked it as missingok, or allfiles is requested.
*/
if (skipMissing && (newFlags & RPMFILE_MISSINGOK)) {
rpmlog(RPMLOG_DEBUG, "%s skipped due to missingok flag\n",
fn);
return FA_SKIP;
} else {
return FA_CREATE;
}
}
diskWhat = rpmfiWhatis((rpm_mode_t)sb.st_mode);
dbWhat = rpmfiWhatis(rpmfiFModeIndex(ofi, oix));
newWhat = rpmfiWhatis(rpmfiFModeIndex(nfi, nix));
/*
* RPM >= 2.3.10 shouldn't create config directories -- we'll ignore
* them in older packages as well.
*/
if (newWhat == XDIR)
return FA_CREATE;
if (diskWhat != newWhat && dbWhat != REG && dbWhat != LINK)
return save;
else if (newWhat != dbWhat && diskWhat != dbWhat)
return save;
else if (dbWhat != newWhat)
return FA_CREATE;
else if (dbWhat != LINK && dbWhat != REG)
return FA_CREATE;
/*
* This order matters - we'd prefer to CREATE the file if at all
* possible in case something else (like the timestamp) has changed.
*/
memset(buffer, 0, sizeof(buffer));
if (dbWhat == REG) {
int oalgo, nalgo;
size_t odiglen, ndiglen;
const unsigned char * odigest, * ndigest;
odigest = rpmfiFDigestIndex(ofi, oix, &oalgo, &odiglen);
if (diskWhat == REG) {
if (rpmDoDigest(oalgo, fn, 0,
(unsigned char *)buffer, NULL))
return FA_CREATE; /* assume file has been removed */
if (odigest && !memcmp(odigest, buffer, odiglen))
return FA_CREATE; /* unmodified config file, replace. */
}
ndigest = rpmfiFDigestIndex(nfi, nix, &nalgo, &ndiglen);
/* Can't compare different hash types, backup to avoid data loss */
if (oalgo != nalgo || odiglen != ndiglen)
return save;
if (odigest && ndigest && !memcmp(odigest, ndigest, odiglen))
return FA_SKIP; /* identical file, don't bother. */
} else /* dbWhat == LINK */ {
const char * oFLink, * nFLink;
oFLink = rpmfiFLinkIndex(ofi, oix);
if (diskWhat == LINK) {
ssize_t link_len = readlink(fn, buffer, sizeof(buffer) - 1);
if (link_len == -1)
return FA_CREATE; /* assume file has been removed */
buffer[link_len] = '\0';
if (oFLink && rstreq(oFLink, buffer))
return FA_CREATE; /* unmodified config file, replace. */
}
nFLink = rpmfiFLinkIndex(nfi, nix);
if (oFLink && nFLink && rstreq(oFLink, nFLink))
return FA_SKIP; /* identical file, don't bother. */
}
/*
* The config file on the disk has been modified, but
* the ones in the two packages are different. It would
* be nice if RPM was smart enough to at least try and
* merge the difference ala CVS, but...
*/
return save;
}
int rpmfiConfigConflictIndex(rpmfi fi, int ix)
{
char * fn = NULL;
rpmfileAttrs flags = rpmfiFFlagsIndex(fi, ix);
char buffer[1024];
rpmFileTypes newWhat, diskWhat;
struct stat sb;
int rc = 0;
/* Non-configs are not config conflicts. */
if (!(flags & RPMFILE_CONFIG))
return 0;
/* Only links and regular files can be %config, this is kinda moot */
/* XXX: Why are we returning 1 here? */
newWhat = rpmfiWhatis(rpmfiFModeIndex(fi, ix));
if (newWhat != LINK && newWhat != REG)
return 1;
/* If it's not on disk, there's nothing to be saved */
fn = rpmfiFNIndex(fi, ix);
if (lstat(fn, &sb))
goto exit;
/*
* Preserve legacy behavior: an existing %ghost %config is considered
* "modified" but unlike regular %config, its never removed and
* never backed up. Whether this actually makes sense is a whole
* another question, but this is very long-standing behavior that
* people might be depending on. The resulting FA_ALTNAME etc action
* is special-cased in FSM to avoid actually creating backups on ghosts.
*/
if (flags & RPMFILE_GHOST) {
rc = 1;
goto exit;
}
/* Files of different types obviously are not identical */
diskWhat = rpmfiWhatis((rpm_mode_t)sb.st_mode);
if (diskWhat != newWhat) {
rc = 1;
goto exit;
}
/* Files of different sizes obviously are not identical */
if (rpmfiFSizeIndex(fi, ix) != sb.st_size) {
rc = 1;
goto exit;
}
memset(buffer, 0, sizeof(buffer));
if (newWhat == REG) {
int algo;
size_t diglen;
const unsigned char *ndigest = rpmfiFDigestIndex(fi,ix, &algo, &diglen);
if (rpmDoDigest(algo, fn, 0, (unsigned char *)buffer, NULL))
goto exit; /* assume file has been removed */
if (ndigest && memcmp(ndigest, buffer, diglen) == 0)
goto exit; /* unmodified config file */
} else /* newWhat == LINK */ {
const char * nFLink;
ssize_t link_len = readlink(fn, buffer, sizeof(buffer) - 1);
if (link_len == -1)
goto exit; /* assume file has been removed */
buffer[link_len] = '\0';
nFLink = rpmfiFLinkIndex(fi, ix);
if (nFLink && rstreq(nFLink, buffer))
goto exit; /* unmodified config file */
}
rc = 1;
exit:
free(fn);
return rc;
}
rpmFileAction rpmfiDecideFateIndex(rpmfi ofi, int oix, rpmfi nfi, int nix,
int skipMissing)
{
char * fn = rpmfiFNIndex(nfi, nix);
rpmfileAttrs newFlags = rpmfiFFlagsIndex(nfi, nix);
char buffer[1024];
rpmFileTypes dbWhat, newWhat, diskWhat;
struct stat sb;
int save = (newFlags & RPMFILE_NOREPLACE) ? FA_ALTNAME : FA_SAVE;
int action = FA_CREATE; /* assume we can create */
/* If the new file is a ghost, leave whatever might be on disk alone. */
if (newFlags & RPMFILE_GHOST) {
action = FA_SKIP;
goto exit;
}
if (lstat(fn, &sb)) {
/*
* The file doesn't exist on the disk. Create it unless the new
* package has marked it as missingok, or allfiles is requested.
*/
if (skipMissing && (newFlags & RPMFILE_MISSINGOK)) {
rpmlog(RPMLOG_DEBUG, "%s skipped due to missingok flag\n",
fn);
action = FA_SKIP;
goto exit;
} else {
goto exit;
}
}
diskWhat = rpmfiWhatis((rpm_mode_t)sb.st_mode);
dbWhat = rpmfiWhatis(rpmfiFModeIndex(ofi, oix));
newWhat = rpmfiWhatis(rpmfiFModeIndex(nfi, nix));
/*
* This order matters - we'd prefer to CREATE the file if at all
* possible in case something else (like the timestamp) has changed.
* Only regular files and symlinks might need a backup, everything
* else falls through here with FA_CREATE.
*/
memset(buffer, 0, sizeof(buffer));
if (dbWhat == REG) {
int oalgo, nalgo;
size_t odiglen, ndiglen;
const unsigned char * odigest, * ndigest;
/* See if the file on disk is identical to the one in old pkg */
odigest = rpmfiFDigestIndex(ofi, oix, &oalgo, &odiglen);
if (diskWhat == REG) {
if (rpmDoDigest(oalgo, fn, 0, (unsigned char *)buffer, NULL))
goto exit; /* assume file has been removed */
if (odigest && memcmp(odigest, buffer, odiglen) == 0)
goto exit; /* unmodified config file, replace. */
}
/* See if the file on disk is identical to the one in new pkg */
ndigest = rpmfiFDigestIndex(nfi, nix, &nalgo, &ndiglen);
if (diskWhat == REG && newWhat == REG) {
/* hash algo changed in new, recalculate digest */
if (oalgo != nalgo)
if (rpmDoDigest(nalgo, fn, 0, (unsigned char *)buffer, NULL))
goto exit; /* assume file has been removed */
if (ndigest && memcmp(ndigest, buffer, ndiglen) == 0)
goto exit; /* file identical in new, replace. */
}
/* If file can be determined identical in old and new pkg, let it be */
if (newWhat == REG && oalgo == nalgo && odiglen == ndiglen) {
if (odigest && ndigest && memcmp(odigest, ndigest, odiglen) == 0) {
action = FA_SKIP; /* identical file, dont bother */
goto exit;
}
}
/* ...but otherwise a backup will be needed */
action = save;
} else if (dbWhat == LINK) {
const char * oFLink, * nFLink;
/* See if the link on disk is identical to the one in old pkg */
oFLink = rpmfiFLinkIndex(ofi, oix);
if (diskWhat == LINK) {
ssize_t link_len = readlink(fn, buffer, sizeof(buffer) - 1);
if (link_len == -1)
goto exit; /* assume file has been removed */
buffer[link_len] = '\0';
if (oFLink && rstreq(oFLink, buffer))
goto exit; /* unmodified config file, replace. */
}
/* See if the link on disk is identical to the one in new pkg */
nFLink = rpmfiFLinkIndex(nfi, nix);
if (diskWhat == LINK && newWhat == LINK) {
if (nFLink && rstreq(nFLink, buffer))
goto exit; /* unmodified config file, replace. */
}
/* If link is identical in old and new pkg, let it be */
if (newWhat == LINK && oFLink && nFLink && rstreq(oFLink, nFLink)) {
action = FA_SKIP; /* identical file, don't bother. */
goto exit;
}
/* ...but otherwise a backup will be needed */
action = save;
}
exit:
free(fn);
return action;
}
