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/* rpmarchive: spit out the main archive portion of a package */
#include "system.h"
#include <rpm/rpmlib.h> /* rpmReadPackageFile .. */
#include <rpm/rpmfi.h>
#include <rpm/rpmtag.h>
#include <rpm/rpmio.h>
#include <rpm/rpmpgp.h>
#include <rpm/rpmts.h>
#include <archive.h>
#include <archive_entry.h>
#include <unistd.h>
#include "debug.h"
#define BUFSIZE (128*1024)
static void fill_archive_entry(struct archive * a, struct archive_entry * entry, rpmfi fi)
{
archive_entry_clear(entry);
const char * dn = rpmfiDN(fi);
if (!strcmp(dn, "")) dn = "/";
char * filename = rstrscat(NULL, ".", dn, rpmfiBN(fi), NULL);
archive_entry_copy_pathname(entry, filename);
_free(filename);
archive_entry_set_size(entry, rpmfiFSize(fi));
rpm_mode_t mode = rpmfiFMode(fi);
archive_entry_set_filetype(entry, mode & S_IFMT);
archive_entry_set_perm(entry, mode);
archive_entry_set_uname(entry, rpmfiFUser(fi));
archive_entry_set_gname(entry, rpmfiFGroup(fi));
archive_entry_set_rdev(entry, rpmfiFRdev(fi));
archive_entry_set_mtime(entry, rpmfiFMtime(fi), 0);
if (S_ISLNK(mode))
archive_entry_set_symlink(entry, rpmfiFLink(fi));
}
static void write_file_content(struct archive * a, char * buf, rpmfi fi)
{
rpm_loff_t left = rpmfiFSize(fi);
size_t len, read;
while (left) {
len = (left > BUFSIZE ? BUFSIZE : left);
read = rpmfiArchiveRead(fi, buf, len);
if (read==len) {
archive_write_data(a, buf, len);
} else {
fprintf(stderr, "Error reading file from rpm payload\n");
break;
}
left -= len;
}
}
static int process_package(rpmts ts, char * filename)
{
FD_t fdi;
FD_t gzdi;
Header h;
int rc = 0;
char * rpmio_flags = NULL;
struct archive *a;
struct archive_entry *entry;
if (!strcmp(filename, "-")) {
fdi = fdDup(STDIN_FILENO);
} else {
fdi = Fopen(filename, "r.ufdio");
}
if (Ferror(fdi)) {
fprintf(stderr, "rpm2archive: %s: %s\n",
filename, Fstrerror(fdi));
exit(EXIT_FAILURE);
}
rc = rpmReadPackageFile(ts, fdi, "rpm2cpio", &h);
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);
}
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);
}
rpmfiles files = rpmfilesNew(NULL, h, 0, RPMFI_KEEPHEADER);
rpmfi fi = rpmfiNewArchiveReader(gzdi, files, RPMFI_ITER_READ_ARCHIVE_CONTENT_FIRST);
/* create archive */
a = archive_write_new();
archive_write_add_filter_gzip(a);
archive_write_set_format_pax_restricted(a);
if (!strcmp(filename, "-")) {
if (isatty(STDOUT_FILENO)) {
fprintf(stderr, "Error: refusing to output archive data to a terminal.\n");
exit(EXIT_FAILURE);
}
archive_write_open_fd(a, STDOUT_FILENO);
} else {
char * outname = rstrscat(NULL, filename, ".tgz", NULL);
archive_write_open_filename(a, outname);
_free(outname);
// XXX error handling
}
entry = archive_entry_new();
char * buf = xmalloc(BUFSIZE);
char * hardlink = NULL;
rc = 0;
while (rc >= 0) {
rc = rpmfiNext(fi);
if (rc == RPMERR_ITER_END) {
break;
}
rpm_mode_t mode = rpmfiFMode(fi);
int nlink = rpmfiFNlink(fi);
fill_archive_entry(a, entry, fi);
if (nlink > 1) {
if (rpmfiArchiveHasContent(fi)) {
_free(hardlink);
hardlink = xstrdup(archive_entry_pathname(entry));
} else {
archive_entry_set_hardlink(entry, hardlink);
}
}
archive_write_header(a, entry);
if (S_ISREG(mode) && (nlink == 1 || rpmfiArchiveHasContent(fi))) {
write_file_content(a, buf, fi);
}
}
/* End of iteration is not an error */
if (rc == RPMERR_ITER_END) {
rc = 0;
}
_free(hardlink);
Fclose(gzdi); /* XXX gzdi == fdi */
archive_entry_free(entry);
archive_write_close(a);
archive_write_free(a);
buf = _free(buf);
rpmfilesFree(files);
rpmfiFree(fi);
headerFree(h);
return rc;
}
int main(int argc, char *argv[])
{
int rc = 0, i;
xsetprogname(argv[0]); /* Portability call -- see system.h */
rpmReadConfigFiles(NULL, NULL);
if (argc > 1 && (rstreq(argv[1], "-h") || rstreq(argv[1], "--help"))) {
fprintf(stderr, "Usage: %s [file.rpm ...]\n", argv[0]);
exit(EXIT_FAILURE);
}
if (argc == 1)
argv[argc++] = "-"; /* abuse NULL pointer at the end of argv */
rpmts ts = rpmtsCreate();
rpmVSFlags vsflags = 0;
/* XXX retain the ageless behavior of rpm2cpio */
vsflags |= RPMVSF_MASK_NODIGESTS;
vsflags |= RPMVSF_MASK_NOSIGNATURES;
vsflags |= RPMVSF_NOHDRCHK;
(void) rpmtsSetVSFlags(ts, vsflags);
for (i = 1; i < argc; i++) {
rc = process_package(ts, argv[i]);
if (rc != 0)
return rc;
}
(void) rpmtsFree(ts);
return rc;
}
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