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-rw-r--r--dpkg-split/info.c292
1 files changed, 292 insertions, 0 deletions
diff --git a/dpkg-split/info.c b/dpkg-split/info.c
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--- /dev/null
+++ b/dpkg-split/info.c
@@ -0,0 +1,292 @@
+/*
+ * dpkg-split - splitting and joining of multipart *.deb archives
+ * info.c - information about split archives
+ *
+ * Copyright © 1995 Ian Jackson <ijackson@chiark.greenend.org.uk>
+ * Copyright © 2008-2012 Guillem Jover <guillem@debian.org>
+ *
+ * This is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#include <config.h>
+#include <compat.h>
+
+#include <sys/stat.h>
+
+#include <errno.h>
+#include <limits.h>
+#include <string.h>
+#include <unistd.h>
+#include <ar.h>
+#include <inttypes.h>
+#include <stdint.h>
+#include <stdlib.h>
+#include <stdio.h>
+
+#include <dpkg/i18n.h>
+#include <dpkg/c-ctype.h>
+#include <dpkg/dpkg.h>
+#include <dpkg/dpkg-db.h>
+#include <dpkg/fdio.h>
+#include <dpkg/ar.h>
+#include <dpkg/options.h>
+
+#include "dpkg-split.h"
+
+static intmax_t
+parse_intmax(const char *value, const char *fn, const char *what)
+{
+ intmax_t r;
+ char *endp;
+
+ errno = 0;
+ r = strtoimax(value, &endp, 10);
+ if (value == endp || *endp)
+ ohshit(_("file '%.250s' is corrupt - bad digit (code %d) in %s"),
+ fn, *endp, what);
+ if (r < 0 || errno == ERANGE)
+ ohshit(_("file '%s' is corrupt; out of range integer in %s"), fn, what);
+ return r;
+}
+
+static char *nextline(char **ripp, const char *fn, const char *what) {
+ char *newline, *rip;
+
+ rip= *ripp;
+ if (!rip)
+ ohshit(_("file '%.250s' is corrupt - %.250s missing"), fn, what);
+ newline= strchr(rip,'\n');
+ if (!newline)
+ ohshit(_("file '%.250s' is corrupt - missing newline after %.250s"),
+ fn, what);
+ *ripp= newline+1;
+ while (newline > rip && c_isspace(newline[-1]))
+ newline--;
+ *newline = '\0';
+ return rip;
+}
+
+/**
+ * Read a deb-split part archive.
+ *
+ * @return Part info (nfmalloc'd) if was an archive part and we read it,
+ * NULL if it wasn't.
+ */
+struct partinfo *
+read_info(struct dpkg_ar *ar, struct partinfo *ir)
+{
+ static char *readinfobuf= NULL;
+ static size_t readinfobuflen= 0;
+
+ size_t thisilen;
+ intmax_t templong;
+ char magicbuf[sizeof(DPKG_AR_MAGIC) - 1], *rip, *partnums, *slash;
+ const char *err;
+ struct dpkg_ar_hdr arh;
+ ssize_t rc;
+
+ rc = fd_read(ar->fd, magicbuf, sizeof(magicbuf));
+ if (rc != sizeof(magicbuf)) {
+ if (rc < 0)
+ ohshite(_("error reading %.250s"), ar->name);
+ else
+ return NULL;
+ }
+ if (memcmp(magicbuf, DPKG_AR_MAGIC, sizeof(magicbuf)))
+ return NULL;
+
+ rc = fd_read(ar->fd, &arh, sizeof(arh));
+ if (rc != sizeof(arh))
+ read_fail(rc, ar->name, "ar header");
+
+ dpkg_ar_normalize_name(&arh);
+
+ if (strncmp(arh.ar_name, PARTMAGIC, sizeof(arh.ar_name)) != 0)
+ return NULL;
+ if (dpkg_ar_member_is_illegal(&arh))
+ ohshit(_("file '%.250s' is corrupt - bad magic at end of first header"),
+ ar->name);
+ thisilen = dpkg_ar_member_get_size(ar, &arh);
+ if (thisilen >= readinfobuflen) {
+ readinfobuflen = thisilen + 2;
+ readinfobuf= m_realloc(readinfobuf,readinfobuflen);
+ }
+ rc = fd_read(ar->fd, readinfobuf, thisilen + (thisilen & 1));
+ if (rc != (ssize_t)(thisilen + (thisilen & 1)))
+ read_fail(rc, ar->name, "reading header member");
+ if (thisilen & 1) {
+ int c = readinfobuf[thisilen + 1];
+
+ if (c != '\n')
+ ohshit(_("file '%.250s' is corrupt - bad padding character (code %d)"),
+ ar->name, c);
+ }
+ readinfobuf[thisilen] = '\0';
+ if (memchr(readinfobuf,0,thisilen))
+ ohshit(_("file '%.250s' is corrupt - nulls in info section"), ar->name);
+
+ ir->filename = ar->name;
+
+ rip= readinfobuf;
+ err = deb_version_parse(&ir->fmtversion,
+ nextline(&rip, ar->name, _("format version number")));
+ if (err)
+ ohshit(_("file '%.250s' has invalid format version: %s"), ar->name, err);
+ if (ir->fmtversion.major != 2)
+ ohshit(_("file '%.250s' is format version %d.%d; get a newer dpkg-split"),
+ ar->name, ir->fmtversion.major, ir->fmtversion.minor);
+
+ ir->package = nfstrsave(nextline(&rip, ar->name, _("package name")));
+ ir->version = nfstrsave(nextline(&rip, ar->name, _("package version number")));
+ ir->md5sum = nfstrsave(nextline(&rip, ar->name, _("package file MD5 checksum")));
+ if (strlen(ir->md5sum) != MD5HASHLEN ||
+ strspn(ir->md5sum, "0123456789abcdef") != MD5HASHLEN)
+ ohshit(_("file '%.250s' is corrupt - bad MD5 checksum '%.250s'"),
+ ar->name, ir->md5sum);
+
+ ir->orglength = parse_intmax(nextline(&rip, ar->name, _("archive total size")),
+ ar->name, _("archive total size"));
+ ir->maxpartlen = parse_intmax(nextline(&rip, ar->name, _("archive part offset")),
+ ar->name, _("archive part offset"));
+
+ partnums = nextline(&rip, ar->name, _("archive part numbers"));
+ slash= strchr(partnums,'/');
+ if (!slash)
+ ohshit(_("file '%.250s' is corrupt - no slash between archive part numbers"), ar->name);
+ *slash++ = '\0';
+
+ templong = parse_intmax(slash, ar->name, _("number of archive parts"));
+ if (templong <= 0 || templong > INT_MAX)
+ ohshit(_("file '%.250s' is corrupt - bad number of archive parts"), ar->name);
+ ir->maxpartn= templong;
+ templong = parse_intmax(partnums, ar->name, _("archive parts number"));
+ if (templong <= 0 || templong > ir->maxpartn)
+ ohshit(_("file '%.250s' is corrupt - bad archive part number"), ar->name);
+ ir->thispartn= templong;
+
+ /* If the package was created with dpkg 1.16.1 or later it will include
+ * the architecture. */
+ if (*rip != '\0')
+ ir->arch = nfstrsave(nextline(&rip, ar->name, _("package architecture")));
+ else
+ ir->arch = NULL;
+
+ rc = fd_read(ar->fd, &arh, sizeof(arh));
+ if (rc != sizeof(arh))
+ read_fail(rc, ar->name, "reading data part member ar header");
+
+ dpkg_ar_normalize_name(&arh);
+
+ if (dpkg_ar_member_is_illegal(&arh))
+ ohshit(_("file '%.250s' is corrupt - bad magic at end of second header"),
+ ar->name);
+ if (strncmp(arh.ar_name,"data",4))
+ ohshit(_("file '%.250s' is corrupt - second member is not data member"),
+ ar->name);
+
+ ir->thispartlen = dpkg_ar_member_get_size(ar, &arh);
+ ir->thispartoffset= (ir->thispartn-1)*ir->maxpartlen;
+
+ if (ir->maxpartn != (ir->orglength+ir->maxpartlen-1)/ir->maxpartlen)
+ ohshit(_("file '%.250s' is corrupt - wrong number of parts for quoted sizes"),
+ ar->name);
+ if (ir->thispartlen !=
+ (ir->thispartn == ir->maxpartn
+ ? ir->orglength - ir->thispartoffset : ir->maxpartlen))
+ ohshit(_("file '%.250s' is corrupt - size is wrong for quoted part number"),
+ ar->name);
+
+ ir->filesize = (strlen(DPKG_AR_MAGIC) +
+ sizeof(arh) + thisilen + (thisilen & 1) +
+ sizeof(arh) + ir->thispartlen + (ir->thispartlen & 1));
+
+ if (S_ISREG(ar->mode)) {
+ /* Don't do this check if it's coming from a pipe or something. It's
+ * only an extra sanity check anyway. */
+ if (ar->size < ir->filesize)
+ ohshit(_("file '%.250s' is corrupt - too short"), ar->name);
+ }
+
+ ir->headerlen = strlen(DPKG_AR_MAGIC) +
+ sizeof(arh) + thisilen + (thisilen & 1) + sizeof(arh);
+
+ return ir;
+}
+
+void mustgetpartinfo(const char *filename, struct partinfo *ri) {
+ struct dpkg_ar *part;
+
+ part = dpkg_ar_open(filename);
+ if (!part)
+ ohshite(_("cannot open archive part file '%.250s'"), filename);
+ if (!read_info(part, ri))
+ ohshite(_("file '%.250s' is not an archive part"), filename);
+ dpkg_ar_close(part);
+}
+
+void print_info(const struct partinfo *pi) {
+ printf(_("%s:\n"
+ " Part format version: %d.%d\n"
+ " Part of package: %s\n"
+ " ... version: %s\n"
+ " ... architecture: %s\n"
+ " ... MD5 checksum: %s\n"
+ " ... length: %jd bytes\n"
+ " ... split every: %jd bytes\n"
+ " Part number: %d/%d\n"
+ " Part length: %jd bytes\n"
+ " Part offset: %jd bytes\n"
+ " Part file size (used portion): %jd bytes\n\n"),
+ pi->filename,
+ pi->fmtversion.major, pi->fmtversion.minor,
+ pi->package,
+ pi->version,
+ pi->arch ? pi->arch : C_("architecture", "<unknown>"),
+ pi->md5sum,
+ (intmax_t)pi->orglength,
+ (intmax_t)pi->maxpartlen,
+ pi->thispartn,
+ pi->maxpartn,
+ (intmax_t)pi->thispartlen,
+ (intmax_t)pi->thispartoffset,
+ (intmax_t)pi->filesize);
+}
+
+int
+do_info(const char *const *argv)
+{
+ const char *thisarg;
+ struct partinfo *pi, ps;
+ struct dpkg_ar *part;
+
+ if (!*argv)
+ badusage(_("--%s requires one or more part file arguments"),
+ cipaction->olong);
+
+ while ((thisarg= *argv++)) {
+ part = dpkg_ar_open(thisarg);
+ if (!part)
+ ohshite(_("cannot open archive part file '%.250s'"), thisarg);
+ pi = read_info(part, &ps);
+ dpkg_ar_close(part);
+ if (pi) {
+ print_info(pi);
+ } else {
+ printf(_("file '%s' is not an archive part\n"), thisarg);
+ }
+ m_output(stdout, _("<standard output>"));
+ }
+
+ return 0;
+}
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