123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179180181182183184185186187188189190191192193194195196197198199200201202203204205206207208209210211212213214215216217218219220221222223224225226227228229230231232233 |
- /*
- * dpkg-split - splitting and joining of multipart *.deb archives
- * info.c - information about split archives
- *
- * Copyright (C) 1995 Ian Jackson <ian@chiark.greenend.org.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 <config.h>
- #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 <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= NULL;
- static size_t readinfobuflen= 0;
- size_t thisilen;
- unsigned int 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 NULL;
- }
- if (memcmp(magicbuf,PARTMAGIC,sizeof(magicbuf))) return NULL;
- 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 dpkg-split"),
- 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: %zi 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,
- (unsigned long)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");
- }
- }
|