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#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <fcntl.h>
#include "pool.h"
#include "repo.h"
#include "repoinfo.h"
#include "repoinfo_download.h"
#include "deltarpm.h"
static inline int
opentmpfile()
{
char tmpl[100];
int fd;
strcpy(tmpl, "/var/tmp/solvXXXXXX");
fd = mkstemp(tmpl);
if (fd < 0)
{
perror("mkstemp");
exit(1);
}
unlink(tmpl);
return fd;
}
FILE *
trydeltadownload(Solvable *s, const char *loc)
{
Repo *repo = s->repo;
Pool *pool = repo->pool;
struct repoinfo *cinfo = repo->appdata;
Dataiterator di;
Id pp;
const unsigned char *chksum;
Id chksumtype;
FILE *retfp = 0;
char *matchname = strdup(pool_id2str(pool, s->name));
dataiterator_init(&di, pool, repo, SOLVID_META, DELTA_PACKAGE_NAME, matchname, SEARCH_STRING);
dataiterator_prepend_keyname(&di, REPOSITORY_DELTAINFO);
while (dataiterator_step(&di))
{
Id baseevr, op;
dataiterator_setpos_parent(&di);
if (pool_lookup_id(pool, SOLVID_POS, DELTA_PACKAGE_EVR) != s->evr ||
pool_lookup_id(pool, SOLVID_POS, DELTA_PACKAGE_ARCH) != s->arch)
continue;
baseevr = pool_lookup_id(pool, SOLVID_POS, DELTA_BASE_EVR);
FOR_PROVIDES(op, pp, s->name)
{
Solvable *os = pool->solvables + op;
if (os->repo == pool->installed && os->name == s->name && os->arch == s->arch && os->evr == baseevr)
break;
}
if (op && access("/usr/bin/applydeltarpm", X_OK) == 0)
{
/* base is installed, run sequence check */
const char *seq;
const char *dloc;
const char *archstr;
FILE *fp;
char cmd[128];
int newfd;
archstr = pool_id2str(pool, s->arch);
if (strlen(archstr) > 10 || strchr(archstr, '\'') != 0)
continue;
seq = pool_tmpjoin(pool, pool_lookup_str(pool, SOLVID_POS, DELTA_SEQ_NAME), "-", pool_lookup_str(pool, SOLVID_POS, DELTA_SEQ_EVR));
seq = pool_tmpappend(pool, seq, "-", pool_lookup_str(pool, SOLVID_POS, DELTA_SEQ_NUM));
if (strchr(seq, '\'') != 0)
continue;
#ifdef FEDORA
sprintf(cmd, "/usr/bin/applydeltarpm -a '%s' -c -s '", archstr);
#else
sprintf(cmd, "/usr/bin/applydeltarpm -c -s '");
#endif
if (system(pool_tmpjoin(pool, cmd, seq, "'")) != 0)
continue; /* didn't match */
/* looks good, download delta */
chksumtype = 0;
chksum = pool_lookup_bin_checksum(pool, SOLVID_POS, DELTA_CHECKSUM, &chksumtype);
if (!chksumtype)
continue; /* no way! */
dloc = pool_lookup_deltalocation(pool, SOLVID_POS, 0);
if (!dloc)
continue;
#ifdef ENABLE_SUSEREPO
if (cinfo->type == TYPE_SUSETAGS)
{
const char *datadir = repo_lookup_str(repo, SOLVID_META, SUSETAGS_DATADIR);
dloc = pool_tmpjoin(pool, datadir ? datadir : "suse", "/", dloc);
}
#endif
if ((fp = curlfopen(cinfo, dloc, 0, chksum, chksumtype, 0)) == 0)
continue;
/* got it, now reconstruct */
newfd = opentmpfile();
#ifdef FEDORA
sprintf(cmd, "applydeltarpm -a '%s' /dev/fd/%d /dev/fd/%d", archstr, fileno(fp), newfd);
#else
sprintf(cmd, "applydeltarpm /dev/fd/%d /dev/fd/%d", fileno(fp), newfd);
#endif
fcntl(fileno(fp), F_SETFD, 0);
if (system(cmd))
{
close(newfd);
fclose(fp);
continue;
}
lseek(newfd, 0, SEEK_SET);
chksumtype = 0;
chksum = solvable_lookup_bin_checksum(s, SOLVABLE_CHECKSUM, &chksumtype);
if (chksumtype && !verify_checksum(newfd, loc, chksum, chksumtype))
{
close(newfd);
fclose(fp);
continue;
}
retfp = fdopen(newfd, "r");
fclose(fp);
break;
}
}
dataiterator_free(&di);
solv_free(matchname);
return retfp;
}
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