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/*
* dpkg-split - splitting and joining of multipart *.deb archives
* queue.c - queue management
*
* Copyright © 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.
*/
/*
* Queue, in /var/lib/dpkg/parts, is a plain directory with one
* file per part.
*
* parts are named
* <md5sum>.<maxpartlen>.<thispartn>.<maxpartn>
* all numbers in hex
*/
#include <config.h>
#include <compat.h>
#include <dpkg/i18n.h>
#include <stdio.h>
#include <stdlib.h>
#include <limits.h>
#include <assert.h>
#include <unistd.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <dirent.h>
#include <string.h>
#include <dpkg/dpkg.h>
#include <dpkg/dpkg-db.h>
#include <dpkg/myopt.h>
#include "dpkg-split.h"
static int decompose_filename(const char *filename, struct partqueue *pq) {
const char *p;
char *q;
if (strspn(filename, "0123456789abcdef") != MD5HASHLEN ||
filename[MD5HASHLEN] != '.')
return 0;
q = nfmalloc(MD5HASHLEN + 1);
memcpy(q, filename, MD5HASHLEN);
q[MD5HASHLEN] = '\0';
pq->info.md5sum= q;
p = filename + MD5HASHLEN + 1;
pq->info.maxpartlen= strtol(p,&q,16); if (q==p || *q++ != '.') return 0;
p=q; pq->info.thispartn= (int)strtol(p,&q,16); if (q==p || *q++ != '.') return 0;
p=q; pq->info.maxpartn= (int)strtol(p,&q,16); if (q==p || *q) return 0;
return 1;
}
void scandepot(void) {
DIR *depot;
struct dirent *de;
struct partqueue *pq;
char *p;
assert(!queue);
depot= opendir(depotdir);
if (!depot) ohshite(_("unable to read depot directory `%.250s'"),depotdir);
while ((de= readdir(depot))) {
if (de->d_name[0] == '.') continue;
pq= nfmalloc(sizeof(struct partqueue));
pq->info.fmtversion= pq->info.package= pq->info.version= NULL;
pq->info.orglength= pq->info.thispartoffset= pq->info.thispartlen= 0;
pq->info.headerlen= 0;
p= nfmalloc(strlen(depotdir)+strlen(de->d_name)+1);
strcpy(p,depotdir);
strcat(p,de->d_name);
pq->info.filename= p;
if (!decompose_filename(de->d_name,pq)) {
pq->info.md5sum= NULL;
pq->info.maxpartlen= pq->info.thispartn= pq->info.maxpartn= 0;
}
pq->nextinqueue= queue;
queue= pq;
}
}
static int partmatches(struct partinfo *pi, struct partinfo *refi) {
return (pi->md5sum &&
!strcmp(pi->md5sum,refi->md5sum) &&
pi->maxpartn == refi->maxpartn &&
pi->maxpartlen == refi->maxpartlen);
}
void do_auto(const char *const *argv) {
const char *partfile;
struct partinfo *pi, *refi, *npi, **partlist, *otherthispart;
struct partqueue *pq;
unsigned int i;
int j, ap;
long nr;
FILE *part;
void *buffer;
char *p, *q;
if (!outputfile) badusage(_("--auto requires the use of the --output option"));
if (!(partfile= *argv++) || *argv)
badusage(_("--auto requires exactly one part file argument"));
refi= nfmalloc(sizeof(struct partqueue));
part= fopen(partfile,"r");
if (!part) ohshite(_("unable to read part file `%.250s'"),partfile);
if (!read_info(part,partfile,refi)) {
if (!npquiet)
printf(_("File `%.250s' is not part of a multipart archive.\n"),partfile);
m_output(stdout, _("<standard output>"));
exit(1);
}
fclose(part);
scandepot();
partlist= nfmalloc(sizeof(struct partinfo*)*refi->maxpartn);
for (i = 0; i < refi->maxpartn; i++)
partlist[i] = NULL;
for (pq= queue; pq; pq= pq->nextinqueue) {
pi= &pq->info;
if (!partmatches(pi,refi)) continue;
npi= nfmalloc(sizeof(struct partinfo));
mustgetpartinfo(pi->filename,npi);
addtopartlist(partlist,npi,refi);
}
/* If we already have a copy of this version we ignore it and prefer the
* new one, but we still want to delete the one in the depot, so we
* save its partinfo (with the filename) for later. This also prevents
* us from accidentally deleting the source file.
*/
otherthispart= partlist[refi->thispartn-1];
partlist[refi->thispartn-1]= refi;
for (j=refi->maxpartn-1; j>=0 && partlist[j]; j--);
if (j>=0) {
part= fopen(partfile,"r");
if (!part) ohshite(_("unable to reopen part file `%.250s'"),partfile);
buffer= nfmalloc(refi->filesize);
nr= fread(buffer,1,refi->filesize,part);
if (nr != refi->filesize) rerreof(part,partfile);
if (getc(part) != EOF) ohshit(_("part file `%.250s' has trailing garbage"),partfile);
if (ferror(part)) rerr(partfile);
fclose(part);
p= nfmalloc(strlen(depotdir)+50);
q= nfmalloc(strlen(depotdir)+200);
sprintf(p,"%st.%lx",depotdir,(long)getpid());
sprintf(q,"%s%s.%lx.%x.%x",depotdir,refi->md5sum,
refi->maxpartlen,refi->thispartn,refi->maxpartn);
part= fopen(p,"w");
if (!part) ohshite(_("unable to open new depot file `%.250s'"),p);
nr= fwrite(buffer,1,refi->filesize,part);
if (nr != refi->filesize) werr(p);
if (fclose(part)) werr(p);
if (rename(p,q)) ohshite(_("unable to rename new depot file `%.250s' to `%.250s'"),p,q);
printf(_("Part %d of package %s filed (still want "),refi->thispartn,refi->package);
/* There are still some parts missing. */
for (i=0, ap=0; i<refi->maxpartn; i++)
if (!partlist[i])
printf("%s%d", !ap++ ? "" : i == (unsigned int)j ? _(" and ") : ", ", i + 1);
printf(").\n");
} else {
/* We have all the parts. */
reassemble(partlist,outputfile);
/* OK, delete all the parts (except the new one, which we never copied). */
partlist[refi->thispartn-1]= otherthispart;
for (i=0; i<refi->maxpartn; i++)
if (partlist[i])
if (unlink(partlist[i]->filename))
ohshite(_("unable to delete used-up depot file `%.250s'"),partlist[i]->filename);
}
m_output(stderr, _("<standard error>"));
}
void do_queue(const char *const *argv) {
struct partqueue *pq, *qq;
struct partinfo ti;
const char *head;
struct stat stab;
unsigned long bytes;
unsigned int i;
if (*argv)
badusage(_("--%s takes no arguments"), cipaction->olong);
scandepot();
head= N_("Junk files left around in the depot directory:\n");
for (pq= queue; pq; pq= pq->nextinqueue) {
if (pq->info.md5sum) continue;
fputs(gettext(head),stdout); head= "";
if (lstat(pq->info.filename,&stab))
ohshit(_("unable to stat `%.250s'"),pq->info.filename);
if (S_ISREG(stab.st_mode)) {
bytes= stab.st_size;
printf(_(" %s (%lu bytes)\n"),pq->info.filename,bytes);
} else {
printf(_(" %s (not a plain file)\n"),pq->info.filename);
}
}
if (!*head) putchar('\n');
head= N_("Packages not yet reassembled:\n");
for (pq= queue; pq; pq= pq->nextinqueue) {
if (!pq->info.md5sum) continue;
mustgetpartinfo(pq->info.filename,&ti);
fputs(gettext(head),stdout); head= "";
printf(_(" Package %s: part(s) "), ti.package);
bytes= 0;
for (i=0; i<ti.maxpartn; i++) {
for (qq= pq;
qq && !(partmatches(&qq->info,&ti) && qq->info.thispartn == i+1);
qq= qq->nextinqueue);
if (qq) {
printf("%d ",i+1);
if (lstat(qq->info.filename,&stab))
ohshite(_("unable to stat `%.250s'"),qq->info.filename);
if (!S_ISREG(stab.st_mode))
ohshit(_("part file `%.250s' is not a plain file"),qq->info.filename);
bytes+= stab.st_size;
qq->info.md5sum= NULL; /* don't find this package again */
}
}
printf(_("(total %lu bytes)\n"),bytes);
}
m_output(stdout, _("<standard output>"));
}
enum discardwhich { ds_junk, ds_package, ds_all };
static void discardsome(enum discardwhich which, const char *package) {
struct partqueue *pq;
for (pq= queue; pq; pq= pq->nextinqueue) {
switch (which) {
case ds_junk:
if (pq->info.md5sum) continue;
break;
case ds_package:
if (!pq->info.md5sum || strcasecmp(pq->info.package,package)) continue;
break;
case ds_all:
break;
default:
internerr("unknown discardwhich '%d'", which);
}
if (unlink(pq->info.filename))
ohshite(_("unable to discard `%.250s'"),pq->info.filename);
printf(_("Deleted %s.\n"),pq->info.filename);
}
}
void do_discard(const char *const *argv) {
const char *thisarg;
struct partqueue *pq;
scandepot();
if (*argv) {
for (pq= queue; pq; pq= pq->nextinqueue)
if (pq->info.md5sum)
mustgetpartinfo(pq->info.filename,&pq->info);
discardsome(ds_junk,NULL);
while ((thisarg= *argv++)) discardsome(ds_package,thisarg);
} else {
discardsome(ds_all,NULL);
}
}
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