rpm2cpio.c
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/* rpmarchive: spit out the main archive portion of a package */
#include "system.h"
const char *__progname;
#include <rpm/rpmlib.h> /* rpmReadPackageFile .. */
#include <rpm/rpmtag.h>
#include <rpm/rpmio.h>
#include <rpm/rpmpgp.h>
#include <rpm/rpmts.h>
#include "debug.h"
int main(int argc, char *argv[])
{
FD_t fdi, fdo;
Header h;
char * rpmio_flags = NULL;
int rc;
off_t payload_size;
FD_t gzdi;
setprogname(argv[0]); /* Retrofit glibc __progname */
rpmReadConfigFiles(NULL, NULL);
if (argc == 1)
fdi = fdDup(STDIN_FILENO);
else {
if (rstreq(argv[1], "-h") || rstreq(argv[1], "--help")) {
fprintf(stderr, "Usage: rpm2cpio file.rpm\n");
exit(EXIT_FAILURE);
}
fdi = Fopen(argv[1], "r.ufdio");
}
if (Ferror(fdi)) {
fprintf(stderr, "%s: %s: %s\n", argv[0],
(argc == 1 ? "<stdin>" : argv[1]), Fstrerror(fdi));
exit(EXIT_FAILURE);
}
fdo = fdDup(STDOUT_FILENO);
{ rpmts ts = rpmtsCreate();
rpmVSFlags vsflags = 0;
/* XXX retain the ageless behavior of rpm2cpio */
vsflags |= _RPMVSF_NODIGESTS;
vsflags |= _RPMVSF_NOSIGNATURES;
vsflags |= RPMVSF_NOHDRCHK;
(void) rpmtsSetVSFlags(ts, vsflags);
rc = rpmReadPackageFile(ts, fdi, "rpm2cpio", &h);
ts = rpmtsFree(ts);
}
switch (rc) {
case RPMRC_OK:
case RPMRC_NOKEY:
case RPMRC_NOTTRUSTED:
break;
case RPMRC_NOTFOUND:
fprintf(stderr, _("argument is not an RPM package\n"));
exit(EXIT_FAILURE);
break;
case RPMRC_FAIL:
default:
fprintf(stderr, _("error reading header from package\n"));
exit(EXIT_FAILURE);
break;
}
/* Retrieve payload size and compression type. */
{ const char *compr = headerGetString(h, RPMTAG_PAYLOADCOMPRESSOR);
rpmio_flags = rstrscat(NULL, "r.", compr ? compr : "gzip", NULL);
payload_size = headerGetNumber(h, RPMTAG_LONGARCHIVESIZE);
}
gzdi = Fdopen(fdi, rpmio_flags); /* XXX gzdi == fdi */
free(rpmio_flags);
if (gzdi == NULL) {
fprintf(stderr, _("cannot re-open payload: %s\n"), Fstrerror(gzdi));
exit(EXIT_FAILURE);
}
rc = (ufdCopy(gzdi, fdo) == payload_size) ? EXIT_SUCCESS : EXIT_FAILURE;
Fclose(fdo);
Fclose(gzdi); /* XXX gzdi == fdi */
return rc;
}