/* * dpkg-split - splitting and joining of multipart *.deb archives * info.c - information about split archives * * Copyright © 1995 Ian Jackson * Copyright © 2008-2012 Guillem Jover * * 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 . */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #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 && 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(FILE *partfile, const char *fn, 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 ar_hdr arh; int c; struct stat stab; if (fread(magicbuf, 1, sizeof(magicbuf), partfile) != sizeof(magicbuf)) { if (ferror(partfile)) ohshite(_("error reading %.250s"), fn); else return NULL; } if (memcmp(magicbuf, DPKG_AR_MAGIC, sizeof(magicbuf))) return NULL; if (fread(&arh,1,sizeof(arh),partfile) != sizeof(arh)) rerreof(partfile,fn); 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"),fn); thisilen = dpkg_ar_member_get_size(fn, &arh); 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; err = deb_version_parse(&ir->fmtversion, nextline(&rip, fn, _("format version number"))); if (err) ohshit(_("file '%.250s' has invalid format version: %s"), fn, err); if (ir->fmtversion.major != 2) ohshit(_("file '%.250s' is format version %d.%d; get a newer dpkg-split"), fn, ir->fmtversion.major, ir->fmtversion.minor); 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) != MD5HASHLEN || strspn(ir->md5sum, "0123456789abcdef") != MD5HASHLEN) ohshit(_("file `%.250s' is corrupt - bad MD5 checksum `%.250s'"),fn,ir->md5sum); ir->orglength = parse_intmax(nextline(&rip, fn, _("archive total size")), fn, _("archive total size")); ir->maxpartlen = parse_intmax(nextline(&rip, fn, _("archive part offset")), fn, _("archive part offset")); partnums = nextline(&rip, fn, _("archive part numbers")); slash= strchr(partnums,'/'); if (!slash) ohshit(_("file '%.250s' is corrupt - no slash between archive part numbers"), fn); *slash++ = '\0'; templong = parse_intmax(slash, fn, _("number of archive parts")); if (templong <= 0 || templong > INT_MAX) ohshit(_("file '%.250s' is corrupt - bad number of archive parts"), fn); ir->maxpartn= templong; templong = parse_intmax(partnums, fn, _("archive parts number")); if (templong <= 0 || templong > ir->maxpartn) ohshit(_("file '%.250s' is corrupt - bad archive part number"),fn); 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, fn, _("package architecture"))); else ir->arch = NULL; if (fread(&arh,1,sizeof(arh),partfile) != sizeof(arh)) rerreof(partfile,fn); dpkg_ar_normalize_name(&arh); if (dpkg_ar_member_is_illegal(&arh)) 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 = dpkg_ar_member_get_size(fn, &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"),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 = (strlen(DPKG_AR_MAGIC) + 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 = strlen(DPKG_AR_MAGIC) + 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: %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", ""), 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; FILE *part; if (!*argv) badusage(_("--%s requires one or more part file arguments"), cipaction->olong); 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); } m_output(stdout, _("")); } return 0; }