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-rw-r--r--split/info.c230
1 files changed, 230 insertions, 0 deletions
diff --git a/split/info.c b/split/info.c
new file mode 100644
index 000000000..fcc36d2b1
--- /dev/null
+++ b/split/info.c
@@ -0,0 +1,230 @@
+/*
+ * dpkg-split - splitting and joining of multipart *.deb archives
+ * info.c - information about split archives
+ *
+ * Copyright (C) 1995 Ian Jackson <iwj10@cus.cam.ac.uk>
+ *
+ * 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,
+ * 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 dpkg; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <limits.h>
+#include <assert.h>
+#include <string.h>
+#include <unistd.h>
+#include <sys/stat.h>
+#include <ar.h>
+#include <ctype.h>
+
+#include "config.h"
+#include "dpkg.h"
+#include "dpkg-db.h"
+#include "dpkg-split.h"
+
+static unsigned long unsignedlong(const char *value, const char *fn, const char *what) {
+ unsigned long r;
+ char *endp;
+
+ r= strtoul(value,&endp,10);
+ if (*endp)
+ ohshit("file `%.250s' is corrupt - bad digit (code %d) in %s",fn,*endp,what);
+ return r;
+}
+
+static unsigned long parseheaderlength(const char *inh, size_t len,
+ const char *fn, const char *what) {
+ char lintbuf[15];
+
+ if (memchr(inh,0,len))
+ ohshit("file `%.250s' is corrupt - %.250s length contains nulls",fn,what);
+ assert(sizeof(lintbuf) > len);
+ memcpy(lintbuf,inh,len);
+ lintbuf[len]= ' ';
+ *strchr(lintbuf,' ')= 0;
+ return unsignedlong(lintbuf,fn,what);
+}
+
+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 && isspace(newline[-1])) newline--;
+ *newline= 0;
+ return rip;
+}
+
+struct partinfo *read_info(FILE *partfile, const char *fn, struct partinfo *ir) {
+ /* returns info (nfmalloc'd) if was an archive part and we read it, 0 if it wasn't */
+ static char *readinfobuf= 0;
+ static int readinfobuflen= 0;
+
+ unsigned long thisilen, templong;
+ char magicbuf[sizeof(PARTMAGIC)-1], *rip, *partnums, *slash;
+ struct ar_hdr arh;
+ int c;
+ struct stat stab;
+
+ if (fread(magicbuf,1,sizeof(PARTMAGIC)-1,partfile) != sizeof(PARTMAGIC)-1)
+ if (ferror(partfile)) rerr(fn); else return 0;
+ if (memcmp(magicbuf,PARTMAGIC,sizeof(magicbuf))) return 0;
+ if (fseek(partfile,-sizeof(arh.ar_name),SEEK_CUR))
+ ohshite("unable to seek back");
+
+ if (fread(&arh,1,sizeof(arh),partfile) != sizeof(arh)) rerreof(partfile,fn);
+ if (memcmp(arh.ar_fmag,ARFMAG,sizeof(arh.ar_fmag)))
+ ohshit("file `%.250s' is corrupt - bad magic at end of first header",fn);
+ thisilen= parseheaderlength(arh.ar_size,sizeof(arh.ar_size),fn,"info length");
+ if (thisilen >= readinfobuflen) {
+ readinfobuflen= thisilen+1;
+ readinfobuf= m_realloc(readinfobuf,readinfobuflen);
+ }
+ if (fread(readinfobuf,1,thisilen,partfile) != thisilen) rerreof(partfile,fn);
+ if (thisilen & 1) {
+ c= getc(partfile); if (c==EOF) rerreof(partfile,fn);
+ if (c != '\n')
+ ohshit("file `%.250s' is corrupt - bad padding character (code %d)",fn,c);
+ }
+ readinfobuf[thisilen]= 0;
+ if (memchr(readinfobuf,0,thisilen))
+ ohshit("file `%.250s' is corrupt - nulls in info section",fn);
+
+ ir->filename= fn;
+
+ rip= readinfobuf;
+ ir->fmtversion= nfstrsave(nextline(&rip,fn,"format version number"));
+ if (strcmp(ir->fmtversion,SPLITVERSION))
+ ohshit("file `%.250s' is format version `%.250s' - you need a newer " SPLITTER,
+ fn,ir->fmtversion);
+
+ ir->package= nfstrsave(nextline(&rip,fn,"package name"));
+ ir->version= nfstrsave(nextline(&rip,fn,"package version number"));
+ ir->md5sum= nfstrsave(nextline(&rip,fn,"package file MD5 checksum"));
+ if (strlen(ir->md5sum) != 32 ||
+ strspn(ir->md5sum,"0123456789abcdef") != 32)
+ ohshit("file `%.250s' is corrupt - bad MD5 checksum `%.250s'",fn,ir->md5sum);
+
+ ir->orglength= unsignedlong(nextline(&rip,fn,"total length"),fn,"total length");
+ ir->maxpartlen= unsignedlong(nextline(&rip,fn,"part offset"),fn,"part offset");
+
+ partnums= nextline(&rip,fn,"part numbers");
+ slash= strchr(partnums,'/');
+ if (!slash) ohshit("file `%.250s' is corrupt - no slash between part numbers",fn);
+ *slash++= 0;
+
+ templong= unsignedlong(slash,fn,"number of parts");
+ if (templong <= 0 || templong > INT_MAX)
+ ohshit("file `%.250s' is corrupt - bad number of parts",fn);
+ ir->maxpartn= templong;
+ templong= unsignedlong(partnums,fn,"parts number");
+ if (templong <= 0 || templong > ir->maxpartn)
+ ohshit("file `%.250s' is corrupt - bad part number",fn);
+ ir->thispartn= templong;
+
+ if (fread(&arh,1,sizeof(arh),partfile) != sizeof(arh)) rerreof(partfile,fn);
+ if (memcmp(arh.ar_fmag,ARFMAG,sizeof(arh.ar_fmag)))
+ ohshit("file `%.250s' is corrupt - bad magic at end of second header",fn);
+ if (strncmp(arh.ar_name,"data",4))
+ ohshit("file `%.250s' is corrupt - second member is not data member",fn);
+
+ ir->thispartlen= parseheaderlength(arh.ar_size,sizeof(arh.ar_size),fn,"data length");
+ 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",fn);
+ 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",fn);
+
+ ir->filesize= (SARMAG +
+ sizeof(arh) + thisilen + (thisilen&1) +
+ sizeof(arh) + ir->thispartlen + (ir->thispartlen&1));
+
+ if (fstat(fileno(partfile),&stab)) ohshite("unable to fstat part file `%.250s'",fn);
+ if (S_ISREG(stab.st_mode)) {
+ /* Don't do this check if it's coming from a pipe or something. It's
+ * only an extra sanity check anyway.
+ */
+ if (stab.st_size < ir->filesize)
+ ohshit("file `%.250s' is corrupt - too short",fn);
+ }
+
+ ir->headerlen= SARMAG + sizeof(arh) + thisilen + (thisilen&1) + sizeof(arh);
+
+ return ir;
+}
+
+void mustgetpartinfo(const char *filename, struct partinfo *ri) {
+ FILE *part;
+
+ part= fopen(filename,"r");
+ if (!part) ohshite("cannot open archive part file `%.250s'",filename);
+ if (!read_info(part,filename,ri))
+ ohshite("file `%.250s' is not an archive part",filename);
+ fclose(part);
+}
+
+void print_info(const struct partinfo *pi) {
+ printf("%s:\n"
+ " Part format version: %s\n"
+ " Part of package: %s\n"
+ " ... version: %s\n"
+ " ... MD5 checksum: %s\n"
+ " ... length: %lu bytes\n"
+ " ... split every: %lu bytes\n"
+ " Part number: %d/%d\n"
+ " Part length: %lu bytes\n"
+ " Part offset: %lu bytes\n"
+ " Part file size (used portion): %lu bytes\n\n",
+ pi->filename,
+ pi->fmtversion,
+ pi->package,
+ pi->version,
+ pi->md5sum,
+ pi->orglength,
+ pi->maxpartlen,
+ pi->thispartn,
+ pi->maxpartn,
+ pi->thispartlen,
+ pi->thispartoffset,
+ pi->filesize);
+}
+
+void do_info(const char *const *argv) {
+ const char *thisarg;
+ struct partinfo *pi, ps;
+ FILE *part;
+
+ if (!*argv) badusage("--info requires one or more part file arguments");
+
+ while ((thisarg= *argv++)) {
+ part= fopen(thisarg,"r");
+ if (!part) ohshite("cannot open archive part file `%.250s'",thisarg);
+ pi= read_info(part,thisarg,&ps);
+ fclose(part);
+ if (pi) {
+ print_info(pi);
+ } else {
+ printf("file `%s' is not an archive part\n",thisarg);
+ }
+ if (ferror(stdout)) werr("stdout");
+ }
+}
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