int main(int argc, const char *const *argv) {
struct dpkg_error err;
int ret;
setlocale(LC_NUMERIC, "POSIX");
setlocale(LC_ALL, "");
bindtextdomain(PACKAGE, LOCALEDIR);
textdomain(PACKAGE);
dpkg_set_progname(BACKEND);
standard_startup();
myopt(&argv, cmdinfos, printforhelp);
if (!cipaction) badusage(_("need an action option"));
if (!compressor_check_params(&compress_params, &err))
badusage(_("invalid compressor parameters: %s"), err.str);
unsetenv("GZIP");
ret = cipaction->action(argv);
standard_shutdown();
return ret;
}
/**
* Overly complex function that builds a .deb file.
*/
int
do_build(const char *const *argv)
{
struct compress_params control_compress_params;
struct dpkg_error err;
struct dpkg_ar *ar;
time_t timestamp;
const char *timestamp_str;
const char *dir, *dest;
char *ctrldir;
char *debar;
char *tfbuf;
int gzfd;
/* Decode our arguments. */
dir = *argv++;
if (!dir)
badusage(_("--%s needs a <directory> argument"), cipaction->olong);
dest = *argv++;
if (dest && *argv)
badusage(_("--%s takes at most two arguments"), cipaction->olong);
debar = gen_dest_pathname(dir, dest);
ctrldir = str_fmt("%s/%s", dir, BUILDCONTROLDIR);
/* Perform some sanity checks on the to-be-build package. */
if (nocheckflag) {
if (debar == NULL)
ohshit(_("target is directory - cannot skip control file check"));
warning(_("not checking contents of control area"));
info(_("building an unknown package in '%s'."), debar);
} else {
struct pkginfo *pkg;
pkg = check_control_area(ctrldir, dir);
if (debar == NULL)
debar = gen_dest_pathname_from_pkg(dest, pkg);
info(_("building package '%s' in '%s'."), pkg->set->name, debar);
}
m_output(stdout, _("<standard output>"));
timestamp_str = getenv("SOURCE_DATE_EPOCH");
if (timestamp_str)
timestamp = parse_timestamp(timestamp_str);
else
timestamp = time(NULL);
/* Now that we have verified everything its time to actually
* build something. Let's start by making the ar-wrapper. */
ar = dpkg_ar_create(debar, 0644);
dpkg_ar_set_mtime(ar, timestamp);
unsetenv("TAR_OPTIONS");
/* Create a temporary file to store the control data in. Immediately
* unlink our temporary file so others can't mess with it. */
tfbuf = path_make_temp_template("dpkg-deb");
gzfd = mkstemp(tfbuf);
if (gzfd == -1)
ohshite(_("failed to make temporary file (%s)"), _("control member"));
/* Make sure it's gone, the fd will remain until we close it. */
if (unlink(tfbuf))
ohshit(_("failed to unlink temporary file (%s), %s"), _("control member"),
tfbuf);
free(tfbuf);
/* Select the compressor to use for our control archive. */
if (opt_uniform_compression) {
control_compress_params = compress_params;
} else {
control_compress_params.type = COMPRESSOR_TYPE_GZIP;
control_compress_params.strategy = COMPRESSOR_STRATEGY_NONE;
control_compress_params.level = -1;
if (!compressor_check_params(&control_compress_params, &err))
internerr("invalid control member compressor params: %s", err.str);
}
/* Fork a tar to package the control-section of the package. */
tarball_pack(ctrldir, control_treewalk_feed, timestamp,
&control_compress_params, gzfd);
free(ctrldir);
if (lseek(gzfd, 0, SEEK_SET))
ohshite(_("failed to rewind temporary file (%s)"), _("control member"));
/* We have our first file for the ar-archive. Write a header for it
* to the package and insert it. */
if (deb_format.major == 0) {
struct stat controlstab;
char versionbuf[40];
if (fstat(gzfd, &controlstab))
ohshite(_("failed to stat temporary file (%s)"), _("control member"));
sprintf(versionbuf, "%-8s\n%jd\n", OLDARCHIVEVERSION,
(intmax_t)controlstab.st_size);
if (fd_write(ar->fd, versionbuf, strlen(versionbuf)) < 0)
ohshite(_("error writing '%s'"), debar);
if (fd_fd_copy(gzfd, ar->fd, -1, &err) < 0)
ohshit(_("cannot copy '%s' into archive '%s': %s"), _("control member"),
ar->name, err.str);
} else if (deb_format.major == 2) {
const char deb_magic[] = ARCHIVEVERSION "\n";
char adminmember[16 + 1];
sprintf(adminmember, "%s%s", ADMINMEMBER,
compressor_get_extension(control_compress_params.type));
dpkg_ar_put_magic(ar);
dpkg_ar_member_put_mem(ar, DEBMAGIC, deb_magic, strlen(deb_magic));
dpkg_ar_member_put_file(ar, adminmember, gzfd, -1);
} else {
internerr("unknown deb format version %d.%d", deb_format.major, deb_format.minor);
}
close(gzfd);
/* Control is done, now we need to archive the data. */
if (deb_format.major == 0) {
/* In old format, the data member is just concatenated after the
* control member, so we do not need a temporary file and can use
* the compression file descriptor. */
gzfd = ar->fd;
} else if (deb_format.major == 2) {
/* Start by creating a new temporary file. Immediately unlink the
* temporary file so others can't mess with it. */
tfbuf = path_make_temp_template("dpkg-deb");
gzfd = mkstemp(tfbuf);
if (gzfd == -1)
ohshite(_("failed to make temporary file (%s)"), _("data member"));
/* Make sure it's gone, the fd will remain until we close it. */
if (unlink(tfbuf))
ohshit(_("failed to unlink temporary file (%s), %s"), _("data member"),
tfbuf);
free(tfbuf);
} else {
internerr("unknown deb format version %d.%d", deb_format.major, deb_format.minor);
}
/* Pack the directory into a tarball, feeding files from the callback. */
tarball_pack(dir, file_treewalk_feed, timestamp, &compress_params, gzfd);
/* Okay, we have data.tar as well now, add it to the ar wrapper. */
if (deb_format.major == 2) {
char datamember[16 + 1];
sprintf(datamember, "%s%s", DATAMEMBER,
compressor_get_extension(compress_params.type));
if (lseek(gzfd, 0, SEEK_SET))
ohshite(_("failed to rewind temporary file (%s)"), _("data member"));
dpkg_ar_member_put_file(ar, datamember, gzfd, -1);
close(gzfd);
}
if (fsync(ar->fd))
ohshite(_("unable to sync file '%s'"), ar->name);
dpkg_ar_close(ar);
free(debar);
return 0;
}
