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#include <alloca.h>
#include <errno.h>
#include <fcntl.h>
#include <stdio.h>
#include <sys/stat.h> /* for mkdir(2) !?! */
#include <unistd.h>
#include "messages.h"
#include "rpmdb.h"
#include "rpmlib.h"
int rpmdbRebuild(char * rootdir) {
rpmdb olddb, newdb;
char * dbpath, * newdbpath;
unsigned int recnum;
Header h;
int failed = 0;
rpmMessage(RPMMESS_DEBUG, "rebuilding database in rootdir %s\n", rootdir);
dbpath = rpmGetVar(RPMVAR_DBPATH);
if (!dbpath) {
rpmMessage(RPMMESS_DEBUG, "no dbpath has been set");
return 1;
}
newdbpath = alloca(strlen(dbpath) + 50 + strlen(rootdir));
sprintf(newdbpath, "%s/%s/rebuilddb.%d", rootdir, dbpath, (int) getpid());
if (!access(newdbpath, F_OK)) {
rpmError(RPMERR_MKDIR, "temporary database %s already exists",
newdbpath);
}
rpmMessage(RPMMESS_DEBUG, "creating directory: %s\n", newdbpath);
if (mkdir(newdbpath, 0755)) {
rpmError(RPMERR_MKDIR, "error creating directory %s: %s",
newdbpath, strerror(errno));
}
sprintf(newdbpath, "%s/rebuilddb.%d", dbpath, (int) getpid());
rpmMessage(RPMMESS_DEBUG, "opening old database\n");
if (openDatabase(rootdir, dbpath, &olddb, O_RDONLY, 0644, 0)) {
return 1;
}
rpmMessage(RPMMESS_DEBUG, "opening new database\n");
if (openDatabase(rootdir, newdbpath, &newdb, O_RDWR | O_CREAT, 0644, 0)) {
return 1;
}
recnum = rpmdbFirstRecNum(olddb);
while (recnum) {
if (!(h = rpmdbGetRecord(olddb, recnum))) {
rpmError(RPMERR_INTERNAL, "cannot read database record at %d", recnum);
failed = 1;
break;
}
if (rpmdbAdd(newdb, h)) {
rpmError(RPMERR_INTERNAL, "cannot add record originally at %d",
recnum);
failed = 1;
break;
}
recnum = rpmdbNextRecNum(olddb, recnum);
}
rpmdbClose(olddb);
rpmdbClose(newdb);
if (failed) {
rpmMessage(RPMMESS_NORMAL, "failed to rebuild database; original database "
"remains in place\n");
rpmdbRemoveDatabase(rootdir, newdbpath);
return 1;
} else {
if (rpmdbMoveDatabase(rootdir, newdbpath, dbpath)) {
rpmMessage(RPMMESS_ERROR, "failed to replace old database with new "
"database!\n");
rpmMessage(RPMMESS_ERROR, "replaces files in %s with files from %s "
"to recover", dbpath, newdbpath);
return 1;
}
rmdir(newdbpath);
}
return 0;
}
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