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lib/package.c

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#include "system.h"

#if !defined(__LCLINT__)
#include <netinet/in.h>
#endif  /* __LCLINT__ */

#include <rpmlib.h>

#include "misc.h"
#include "rpmlead.h"
#include "signature.h"
#include "debug.h"

#define alloca_strdup(_s)       strcpy(alloca(strlen(_s)+1), (_s))

/*@access Header@*/             /* XXX compared with NULL */

void headerMergeLegacySigs(Header h, const Header sig)
{
    HeaderIterator hi;
    int_32 tag, type, count;
    const void * ptr;

    for (hi = headerInitIterator(sig);
        headerNextIterator(hi, &tag, &type, &ptr, &count);
        ptr = headerFreeData(ptr, type))
    {
        switch (tag) {
        case RPMSIGTAG_SIZE:    tag = RPMTAG_SIGSIZE;   break;
        case RPMSIGTAG_LEMD5_1: tag = RPMTAG_SIGLEMD5_1;break;
        case RPMSIGTAG_PGP:     tag = RPMTAG_SIGPGP;    break;
        case RPMSIGTAG_LEMD5_2: tag = RPMTAG_SIGLEMD5_2;break;
        case RPMSIGTAG_MD5:     tag = RPMTAG_SIGMD5;    break;
        case RPMSIGTAG_GPG:     tag = RPMTAG_SIGGPG;    break;
        case RPMSIGTAG_PGP5:    tag = RPMTAG_SIGPGP5;   break;
        default:
            continue;
            /*@notreached@*/ break;
        }
        if (!headerIsEntry(h, tag))
            headerAddEntry(h, tag, type, ptr, count);
    }
    headerFreeIterator(hi);
}

Header headerRegenSigHeader(const Header h)
{
    Header sig = rpmNewSignature();
    HeaderIterator hi;
    int_32 tag, stag, type, count;
    const void * ptr;

    for (hi = headerInitIterator(h);
        headerNextIterator(hi, &tag, &type, &ptr, &count);
        ptr = headerFreeData(ptr, type))
    {
        switch (tag) {
        case RPMTAG_SIGSIZE:    stag = RPMSIGTAG_SIZE;  break;
        case RPMTAG_SIGLEMD5_1: stag = RPMSIGTAG_LEMD5_1;break;
        case RPMTAG_SIGPGP:     stag = RPMSIGTAG_PGP;   break;
        case RPMTAG_SIGLEMD5_2: stag = RPMSIGTAG_LEMD5_2;break;
        case RPMTAG_SIGMD5:     stag = RPMSIGTAG_MD5;   break;
        case RPMTAG_SIGGPG:     stag = RPMSIGTAG_GPG;   break;
        case RPMTAG_SIGPGP5:    stag = RPMSIGTAG_PGP5;  break;
        default:
            continue;
            /*@notreached@*/ break;
        }
        if (!headerIsEntry(sig, stag))
            headerAddEntry(sig, stag, type, ptr, count);
    }
    headerFreeIterator(hi);
    return sig;
}

static rpmRC readPackageHeaders(FD_t fd, /*@out@*/ struct rpmlead * leadPtr, 
                              /*@out@*/ Header * sigs, /*@out@*/ Header *hdrPtr)
        /*@modifies fd, *leadPtr, *sigs, *hdrPtr @*/
{
    Header hdrBlock;
    struct rpmlead leadBlock;
    Header * hdr = NULL;
    struct rpmlead * lead;
    char * defaultPrefix;
    struct stat sb;
    int_32 true = 1;
    rpmRC rc;

    hdr = hdrPtr ? hdrPtr : &hdrBlock;
    lead = leadPtr ? leadPtr : &leadBlock;

    fstat(Fileno(fd), &sb);
    /* if fd points to a socket, pipe, etc, sb.st_size is *always* zero */
    if (S_ISREG(sb.st_mode) && sb.st_size < sizeof(*lead)) return 1;

    if (readLead(fd, lead))
        return RPMRC_FAIL;

    if (lead->magic[0] != RPMLEAD_MAGIC0 || lead->magic[1] != RPMLEAD_MAGIC1 ||
        lead->magic[2] != RPMLEAD_MAGIC2 || lead->magic[3] != RPMLEAD_MAGIC3) {
        return RPMRC_BADMAGIC;
    }

    switch (lead->major) {
    case 1:
        rpmError(RPMERR_NEWPACKAGE,
            _("packaging version 1 is not supported by this version of RPM\n"));
        return RPMRC_FAIL;
        /*@notreached@*/ break;
    case 2:
    case 3:
    case 4:
        rc = rpmReadSignature(fd, sigs, lead->signature_type);
        if (rc == RPMRC_FAIL)
            return rc;
        *hdr = headerRead(fd, (lead->major >= 3)
                          ? HEADER_MAGIC_YES : HEADER_MAGIC_NO);
        if (*hdr == NULL) {
            if (sigs != NULL)
                headerFree(*sigs);
            return RPMRC_FAIL;
        }

        /*
         * 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(*hdr, RPMTAG_FILEUSERNAME))
            headerRemoveEntry(*hdr, RPMTAG_FILEUIDS);
        if (headerIsEntry(*hdr, RPMTAG_FILEGROUPNAME))
            headerRemoveEntry(*hdr, 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. */
        if (headerGetEntry(*hdr, RPMTAG_DEFAULTPREFIX, NULL,
                           (void **) &defaultPrefix, NULL)) {
            defaultPrefix =
                stripTrailingChar(alloca_strdup(defaultPrefix), '/');
            headerAddEntry(*hdr, RPMTAG_PREFIXES, RPM_STRING_ARRAY_TYPE,
                           &defaultPrefix, 1); 
        }

        /*
         * 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(*hdr);

    /* XXX binary rpms always have RPMTAG_SOURCERPM, source rpms do not */
        if (lead->type == RPMLEAD_SOURCE) {
            if (!headerIsEntry(*hdr, RPMTAG_SOURCEPACKAGE))
                headerAddEntry(*hdr, RPMTAG_SOURCEPACKAGE, RPM_INT32_TYPE,
                                &true, 1);
        } else if (lead->major < 4) {
            /* Retrofit "Provide: name = EVR" for binary packages. */
            providePackageNVR(*hdr);
        }
        break;

    default:
        rpmError(RPMERR_NEWPACKAGE, _("only packaging with major numbers <= 4 "
                "is supported by this version of RPM\n"));
        return RPMRC_FAIL;
        /*@notreached@*/ break;
    } 

    if (hdrPtr == NULL)
        headerFree(*hdr);
    
    return RPMRC_OK;
}

rpmRC rpmReadPackageInfo(FD_t fd, Header * sigp, Header * hdrp)
{
    rpmRC rc = readPackageHeaders(fd, NULL, sigp, hdrp);
    if (rc == RPMRC_FAIL)
        return rc;
    if (hdrp && *hdrp && sigp && *sigp)
        headerMergeLegacySigs(*hdrp, *sigp);
    return rc;
}

rpmRC rpmReadPackageHeader(FD_t fd, Header * hdrp, int * isSource, int * major,
                  int * minor)
{
    struct rpmlead lead;
    Header sig = NULL;
    rpmRC rc = readPackageHeaders(fd, &lead, &sig, hdrp);

    if (rc == RPMRC_FAIL)
        goto exit;

    if (hdrp && *hdrp && sig) {
        headerMergeLegacySigs(*hdrp, sig);
        headerFree(sig);
    }
   
    if (isSource) *isSource = lead.type == RPMLEAD_SOURCE;
    if (major) *major = lead.major;
    if (minor) *minor = lead.minor;
   
exit:
    return rc;
}

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