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rpm/rpmdb/legacy.c

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/**
* \file rpmdb/legacy.c
*/
#include "system.h"
#if HAVE_GELF_H
#include <gelf.h>
#if !defined(DT_GNU_PRELINKED)
#define DT_GNU_PRELINKED 0x6ffffdf5
#endif
#if !defined(DT_GNU_LIBLIST)
#define DT_GNU_LIBLIST 0x6ffffef9
#endif
#endif
#include "rpmio_internal.h"
#include <rpmlib.h>
#include <rpmmacro.h>
#include "misc.h"
#include "legacy.h"
#include "debug.h"
#define alloca_strdup(_s) strcpy(alloca(strlen(_s)+1), (_s))
/**
* Open a file descriptor to verify file MD5 and size.
* @param path file path
* @retval pidp prelink helper pid or 0
* @retval fsizep file size
* @return -1 on error, otherwise, an open file descriptor
*/
static int open_dso(const char * path, /*@null@*/ pid_t * pidp, /*@null@*/ size_t *fsizep)
/*@globals rpmGlobalMacroContext, h_errno, fileSystem, internalState @*/
/*@modifies *pidp, *fsizep, rpmGlobalMacroContext,
fileSystem, internalState @*/
{
/*@only@*/
static const char * cmd = NULL;
static int initted = 0;
int fdno;
if (!initted) {
cmd = rpmExpand("%{?__prelink_undo_cmd}", NULL);
initted++;
}
/*@-boundswrite@*/
if (pidp) *pidp = 0;
if (fsizep) {
struct stat sb, * st = &sb;
if (stat(path, st) < 0)
return -1;
*fsizep = st->st_size;
}
/*@=boundswrite@*/
fdno = open(path, O_RDONLY);
if (fdno < 0)
return fdno;
/*@-boundsread@*/
if (!(cmd && *cmd))
return fdno;
/*@=boundsread@*/
#if HAVE_GELF_H && HAVE_LIBELF
{ Elf *elf = NULL;
Elf_Scn *scn = NULL;
Elf_Data *data = NULL;
GElf_Ehdr ehdr;
GElf_Shdr shdr;
GElf_Dyn dyn;
int bingo;
(void) elf_version(EV_CURRENT);
/*@-evalorder@*/
if ((elf = elf_begin (fdno, ELF_C_READ, NULL)) == NULL
|| elf_kind(elf) != ELF_K_ELF
|| gelf_getehdr(elf, &ehdr) == NULL
|| !(ehdr.e_type == ET_DYN || ehdr.e_type == ET_EXEC))
goto exit;
/*@=evalorder@*/
bingo = 0;
/*@-branchstate -uniondef @*/
while (!bingo && (scn = elf_nextscn(elf, scn)) != NULL) {
(void) gelf_getshdr(scn, &shdr);
if (shdr.sh_type != SHT_DYNAMIC)
continue;
while (!bingo && (data = elf_getdata (scn, data)) != NULL) {
int maxndx = data->d_size / shdr.sh_entsize;
int ndx;
for (ndx = 0; ndx < maxndx; ++ndx) {
(void) gelf_getdyn (data, ndx, &dyn);
if (!(dyn.d_tag == DT_GNU_PRELINKED || dyn.d_tag == DT_GNU_LIBLIST))
/*@innercontinue@*/ continue;
bingo = 1;
/*@innerbreak@*/ break;
}
}
}
/*@=branchstate =uniondef @*/
/*@-boundswrite@*/
if (pidp != NULL && bingo) {
int pipes[2];
pid_t pid;
int xx;
xx = close(fdno);
pipes[0] = pipes[1] = -1;
xx = pipe(pipes);
if (!(pid = fork())) {
const char ** av;
int ac;
xx = close(pipes[0]);
xx = dup2(pipes[1], STDOUT_FILENO);
xx = close(pipes[1]);
if (!poptParseArgvString(cmd, &ac, &av)) {
av[ac-1] = path;
av[ac] = NULL;
unsetenv("MALLOC_CHECK_");
xx = execve(av[0], (char *const *)av+1, environ);
}
_exit(127);
}
*pidp = pid;
fdno = pipes[0];
xx = close(pipes[1]);
}
/*@=boundswrite@*/
exit:
if (elf) (void) elf_end(elf);
}
#endif
return fdno;
}
int domd5(const char * fn, unsigned char * digest, int asAscii, size_t *fsizep)
{
const char * path;
urltype ut = urlPath(fn, &path);
unsigned char * md5sum = NULL;
size_t md5len;
unsigned char buf[32*BUFSIZ];
FD_t fd;
size_t fsize = 0;
pid_t pid = 0;
int rc = 0;
int fdno;
int xx;
/*@-globs -internalglobs -mods @*/
fdno = open_dso(path, &pid, &fsize);
/*@=globs =internalglobs =mods @*/
if (fdno < 0) {
rc = 1;
goto exit;
}
switch(ut) {
case URL_IS_PATH:
case URL_IS_UNKNOWN:
#if HAVE_MMAP
if (pid == 0) {
DIGEST_CTX ctx;
void * mapped;
mapped = mmap(NULL, fsize, PROT_READ, MAP_SHARED, fdno, 0);
if (mapped == (void *)-1) {
xx = close(fdno);
rc = 1;
break;
}
#ifdef MADV_SEQUENTIAL
xx = madvise(mapped, fsize, MADV_SEQUENTIAL);
#endif
ctx = rpmDigestInit(PGPHASHALGO_MD5, RPMDIGEST_NONE);
xx = rpmDigestUpdate(ctx, mapped, fsize);
xx = rpmDigestFinal(ctx, (void **)&md5sum, &md5len, asAscii);
xx = munmap(mapped, fsize);
xx = close(fdno);
break;
} /*@fallthrough@*/
#endif
case URL_IS_FTP:
case URL_IS_HTTP:
case URL_IS_DASH:
default:
/* Either use the pipe to prelink -y or open the URL. */
fd = (pid != 0) ? fdDup(fdno) : Fopen(fn, "r.ufdio");
(void) close(fdno);
if (fd == NULL || Ferror(fd)) {
rc = 1;
if (fd != NULL)
(void) Fclose(fd);
break;
}
fdInitDigest(fd, PGPHASHALGO_MD5, 0);
fsize = 0;
while ((rc = Fread(buf, sizeof(buf[0]), sizeof(buf), fd)) > 0)
fsize += rc;
fdFiniDigest(fd, PGPHASHALGO_MD5, (void **)&md5sum, &md5len, asAscii);
if (Ferror(fd))
rc = 1;
(void) Fclose(fd);
break;
}
/* Reap the prelink -y helper. */
if (pid) {
int status;
(void) waitpid(pid, &status, 0);
if (!WIFEXITED(status) || WEXITSTATUS(status))
rc = 1;
}
exit:
/*@-boundswrite@*/
if (fsizep)
*fsizep = fsize;
if (!rc)
memcpy(digest, md5sum, md5len);
/*@=boundswrite@*/
md5sum = _free(md5sum);
return rc;
}
/*@-exportheadervar@*/
/*@unchecked@*/
int _noDirTokens = 0;
/*@=exportheadervar@*/
/*@-boundsread@*/
static int dncmp(const void * a, const void * b)
/*@*/
{
const char *const * first = a;
const char *const * second = b;
return strcmp(*first, *second);
}
/*@=boundsread@*/
/*@-bounds@*/
void compressFilelist(Header h)
{
HGE_t hge = (HGE_t)headerGetEntryMinMemory;
HAE_t hae = (HAE_t)headerAddEntry;
HRE_t hre = (HRE_t)headerRemoveEntry;
HFD_t hfd = headerFreeData;
char ** fileNames;
const char ** dirNames;
const char ** baseNames;
int_32 * dirIndexes;
rpmTagType fnt;
int count;
int i, xx;
int dirIndex = -1;
/*
* This assumes the file list is already sorted, and begins with a
* single '/'. That assumption isn't critical, but it makes things go
* a bit faster.
*/
if (headerIsEntry(h, RPMTAG_DIRNAMES)) {
xx = hre(h, RPMTAG_OLDFILENAMES);
return; /* Already converted. */
}
if (!hge(h, RPMTAG_OLDFILENAMES, &fnt, (void **) &fileNames, &count))
return; /* no file list */
if (fileNames == NULL || count <= 0)
return;
dirNames = alloca(sizeof(*dirNames) * count); /* worst case */
baseNames = alloca(sizeof(*dirNames) * count);
dirIndexes = alloca(sizeof(*dirIndexes) * count);
if (fileNames[0][0] != '/') {
/* HACK. Source RPM, so just do things differently */
dirIndex = 0;
dirNames[dirIndex] = "";
for (i = 0; i < count; i++) {
dirIndexes[i] = dirIndex;
baseNames[i] = fileNames[i];
}
goto exit;
}
/*@-branchstate@*/
for (i = 0; i < count; i++) {
const char ** needle;
char savechar;
char * baseName;
int len;
if (fileNames[i] == NULL) /* XXX can't happen */
continue;
baseName = strrchr(fileNames[i], '/') + 1;
len = baseName - fileNames[i];
needle = dirNames;
savechar = *baseName;
*baseName = '\0';
/*@-compdef@*/
if (dirIndex < 0 ||
(needle = bsearch(&fileNames[i], dirNames, dirIndex + 1, sizeof(dirNames[0]), dncmp)) == NULL) {
char *s = alloca(len + 1);
memcpy(s, fileNames[i], len + 1);
s[len] = '\0';
dirIndexes[i] = ++dirIndex;
dirNames[dirIndex] = s;
} else
dirIndexes[i] = needle - dirNames;
/*@=compdef@*/
*baseName = savechar;
baseNames[i] = baseName;
}
/*@=branchstate@*/
exit:
if (count > 0) {
xx = hae(h, RPMTAG_DIRINDEXES, RPM_INT32_TYPE, dirIndexes, count);
xx = hae(h, RPMTAG_BASENAMES, RPM_STRING_ARRAY_TYPE,
baseNames, count);
xx = hae(h, RPMTAG_DIRNAMES, RPM_STRING_ARRAY_TYPE,
dirNames, dirIndex + 1);
}
fileNames = hfd(fileNames, fnt);
xx = hre(h, RPMTAG_OLDFILENAMES);
}
/*@=bounds@*/
void rpmfiBuildFNames(Header h, rpmTag tagN,
/*@out@*/ const char *** fnp, /*@out@*/ int * fcp)
{
HGE_t hge = (HGE_t)headerGetEntryMinMemory;
HFD_t hfd = headerFreeData;
const char ** baseNames;
const char ** dirNames;
int * dirIndexes;
int count;
const char ** fileNames;
int size;
rpmTag dirNameTag = 0;
rpmTag dirIndexesTag = 0;
rpmTagType bnt, dnt;
char * t;
int i, xx;
if (tagN == RPMTAG_BASENAMES) {
dirNameTag = RPMTAG_DIRNAMES;
dirIndexesTag = RPMTAG_DIRINDEXES;
} else if (tagN == RPMTAG_ORIGBASENAMES) {
dirNameTag = RPMTAG_ORIGDIRNAMES;
dirIndexesTag = RPMTAG_ORIGDIRINDEXES;
}
if (!hge(h, tagN, &bnt, (void **) &baseNames, &count)) {
if (fnp) *fnp = NULL;
if (fcp) *fcp = 0;
return; /* no file list */
}
xx = hge(h, dirNameTag, &dnt, (void **) &dirNames, NULL);
xx = hge(h, dirIndexesTag, NULL, (void **) &dirIndexes, &count);
size = sizeof(*fileNames) * count;
for (i = 0; i < count; i++)
size += strlen(baseNames[i]) + strlen(dirNames[dirIndexes[i]]) + 1;
fileNames = xmalloc(size);
t = ((char *) fileNames) + (sizeof(*fileNames) * count);
/*@-branchstate@*/
for (i = 0; i < count; i++) {
fileNames[i] = t;
t = stpcpy( stpcpy(t, dirNames[dirIndexes[i]]), baseNames[i]);
*t++ = '\0';
}
/*@=branchstate@*/
baseNames = hfd(baseNames, bnt);
dirNames = hfd(dirNames, dnt);
/*@-branchstate@*/
if (fnp)
*fnp = fileNames;
else
fileNames = _free(fileNames);
/*@=branchstate@*/
if (fcp) *fcp = count;
}
void expandFilelist(Header h)
{
HAE_t hae = (HAE_t)headerAddEntry;
HRE_t hre = (HRE_t)headerRemoveEntry;
const char ** fileNames = NULL;
int count = 0;
int xx;
/*@-branchstate@*/
if (!headerIsEntry(h, RPMTAG_OLDFILENAMES)) {
rpmfiBuildFNames(h, RPMTAG_BASENAMES, &fileNames, &count);
if (fileNames == NULL || count <= 0)
return;
xx = hae(h, RPMTAG_OLDFILENAMES, RPM_STRING_ARRAY_TYPE,
fileNames, count);
fileNames = _free(fileNames);
}
/*@=branchstate@*/
xx = hre(h, RPMTAG_DIRNAMES);
xx = hre(h, RPMTAG_BASENAMES);
xx = hre(h, RPMTAG_DIRINDEXES);
}
/*
* Up to rpm 3.0.4, packages implicitly provided their own name-version-release.
* Retrofit an explicit "Provides: name = epoch:version-release.
*/
void providePackageNVR(Header h)
{
HGE_t hge = (HGE_t)headerGetEntryMinMemory;
HFD_t hfd = headerFreeData;
const char *name, *version, *release;
int_32 * epoch;
const char *pEVR;
char *p;
int_32 pFlags = RPMSENSE_EQUAL;
const char ** provides = NULL;
const char ** providesEVR = NULL;
rpmTagType pnt, pvt;
int_32 * provideFlags = NULL;
int providesCount;
int i, xx;
int bingo = 1;
/* Generate provides for this package name-version-release. */
xx = headerNVR(h, &name, &version, &release);
if (!(name && version && release))
return;
pEVR = p = alloca(21 + strlen(version) + 1 + strlen(release) + 1);
*p = '\0';
if (hge(h, RPMTAG_EPOCH, NULL, (void **) &epoch, NULL)) {
sprintf(p, "%d:", *epoch);
while (*p != '\0')
p++;
}
(void) stpcpy( stpcpy( stpcpy(p, version) , "-") , release);
/*
* Rpm prior to 3.0.3 does not have versioned provides.
* If no provides at all are available, we can just add.
*/
if (!hge(h, RPMTAG_PROVIDENAME, &pnt, (void **) &provides, &providesCount))
goto exit;
/*
* Otherwise, fill in entries on legacy packages.
*/
if (!hge(h, RPMTAG_PROVIDEVERSION, &pvt, (void **) &providesEVR, NULL)) {
for (i = 0; i < providesCount; i++) {
char * vdummy = "";
int_32 fdummy = RPMSENSE_ANY;
xx = headerAddOrAppendEntry(h, RPMTAG_PROVIDEVERSION, RPM_STRING_ARRAY_TYPE,
&vdummy, 1);
xx = headerAddOrAppendEntry(h, RPMTAG_PROVIDEFLAGS, RPM_INT32_TYPE,
&fdummy, 1);
}
goto exit;
}
xx = hge(h, RPMTAG_PROVIDEFLAGS, NULL, (void **) &provideFlags, NULL);
/*@-nullderef@*/ /* LCL: providesEVR is not NULL */
if (provides && providesEVR && provideFlags)
for (i = 0; i < providesCount; i++) {
if (!(provides[i] && providesEVR[i]))
continue;
if (!(provideFlags[i] == RPMSENSE_EQUAL &&
!strcmp(name, provides[i]) && !strcmp(pEVR, providesEVR[i])))
continue;
bingo = 0;
break;
}
/*@=nullderef@*/
exit:
provides = hfd(provides, pnt);
providesEVR = hfd(providesEVR, pvt);
if (bingo) {
xx = headerAddOrAppendEntry(h, RPMTAG_PROVIDENAME, RPM_STRING_ARRAY_TYPE,
&name, 1);
xx = headerAddOrAppendEntry(h, RPMTAG_PROVIDEFLAGS, RPM_INT32_TYPE,
&pFlags, 1);
xx = headerAddOrAppendEntry(h, RPMTAG_PROVIDEVERSION, RPM_STRING_ARRAY_TYPE,
&pEVR, 1);
}
}
void legacyRetrofit(Header h, const struct rpmlead * lead)
{
const char * prefix;
/*
* We don't use these entries (and rpm >= 2 never has) and they are
* pretty misleading. Let's just get rid of them so they don't confuse
* anyone.
*/
if (headerIsEntry(h, RPMTAG_FILEUSERNAME))
(void) headerRemoveEntry(h, RPMTAG_FILEUIDS);
if (headerIsEntry(h, RPMTAG_FILEGROUPNAME))
(void) headerRemoveEntry(h, RPMTAG_FILEGIDS);
/*
* We switched the way we do relocateable packages. We fix some of
* it up here, though the install code still has to be a bit
* careful. This fixup makes queries give the new values though,
* which is quite handy.
*/
/*@=branchstate@*/
if (headerGetEntry(h, RPMTAG_DEFAULTPREFIX, NULL, (void **) &prefix, NULL))
{
const char * nprefix = stripTrailingChar(alloca_strdup(prefix), '/');
(void) headerAddEntry(h, RPMTAG_PREFIXES, RPM_STRING_ARRAY_TYPE,
&nprefix, 1);
}
/*@=branchstate@*/
/*
* The file list was moved to a more compressed format which not
* only saves memory (nice), but gives fingerprinting a nice, fat
* speed boost (very nice). Go ahead and convert old headers to
* the new style (this is a noop for new headers).
*/
if (lead->major < 4)
compressFilelist(h);
/* XXX binary rpms always have RPMTAG_SOURCERPM, source rpms do not */
if (lead->type == RPMLEAD_SOURCE) {
int_32 one = 1;
if (!headerIsEntry(h, RPMTAG_SOURCEPACKAGE))
(void) headerAddEntry(h, RPMTAG_SOURCEPACKAGE, RPM_INT32_TYPE,
&one, 1);
} else if (lead->major < 4) {
/* Retrofit "Provide: name = EVR" for binary packages. */
providePackageNVR(h);
}
}
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