--- /dev/null
+#include <stdio.h>
+#include <string.h>
+#include <stdlib.h>
+#include <unistd.h>
+#define _GNU_SOURCE
+#include <getopt.h>
+#include <wait.h>
+#include <fstream.h>
+
+#include <apt-pkg/init.h>
+#if APT_PKG_MAJOR >= 3
+#define APT_COMPATIBILITY 986
+#include <apt-pkg/debversion.h>
+#endif
+#include <apt-pkg/pkgcache.h>
+#include <apt-pkg/configuration.h>
+#include <apt-pkg/progress.h>
+#include <apt-pkg/sourcelist.h>
+#include <apt-pkg/pkgcachegen.h>
+#include <apt-pkg/version.h>
+#include "debfile.h"
+
+#define TMPDIR "/var/lib/debconf/"
+#define STR(x) (x ? x : "")
+//#define TMPDIR "tmp/"
+
+void help(void)
+{
+ fprintf(stderr, "apt-extracttemplates deb [deb]\n");
+ exit(0);
+}
+
+char *writefile(const char *prefix, const char *data)
+{
+ char fn[512];
+ static int i;
+ snprintf(fn, sizeof(fn), "%s%s.%u%d", TMPDIR, prefix, getpid(), i++);
+
+ if (data == NULL) data = "";
+
+ ofstream ofs(fn);
+ if (!ofs) return NULL;
+ ofs << data;
+ ofs.close();
+ return strdup(fn);
+}
+
+void writeconfig(const DebFile &file)
+{
+ char *templatefile = writefile("template", file.Template);
+ char *configscript = writefile("config", file.Config);
+
+ if (templatefile == 0 || configscript == 0)
+ {
+ fprintf(stderr, "Cannot write config script or templates\n");
+ return;
+ }
+ printf("%s %s %s %s\n",
+ STR(file.Package), // Package
+ STR(file.Version), // Version
+ templatefile, // Template
+ configscript // Config
+ );
+}
+
+void init(MMap *&Map, pkgCache *&Cache)
+{
+ // Initialize the apt cache
+ if (pkgInitConfig(*_config) == false || pkgInitSystem(*_config, _system) == false)
+ {
+ fprintf(stderr, "Cannot initialize apt cache\n");
+ return;
+ }
+ pkgSourceList List;
+ List.ReadMainList();
+ OpProgress Prog;
+ pkgMakeStatusCache(List,Prog,&Map,true);
+ Cache = new pkgCache(Map);
+}
+
+int main(int argc, char **argv, char **env)
+{
+ int idx = 0;
+ char **debs = 0;
+ int numdebs = 0;
+ MMap *Map = 0;
+ const char *debconfver = NULL;
+
+ init(Map, DebFile::Cache);
+ if (Map == 0 || DebFile::Cache == 0)
+ {
+ fprintf(stderr, "Cannot initialize APT cache\n");
+ return 1;
+ }
+
+ debconfver = DebFile::GetInstalledVer("debconf");
+
+ if (debconfver == NULL)
+ {
+ fprintf(stderr, "Cannot get debconf version. Is debconf installed?\n");
+ return 1;
+ }
+
+ numdebs = argc - 1;
+ debs = new char *[numdebs];
+ memcpy(debs, &argv[1], sizeof(char *) * numdebs);
+
+ if (numdebs < 1)
+ {
+ fprintf(stderr, "apt-extracttemplates foo.deb [...]\n");
+ return 0;
+ }
+
+ for (idx = 0; idx < numdebs; idx++)
+ {
+ DebFile file(debs[idx]);
+ if (file.Go() == false)
+ {
+ fprintf(stderr, "Cannot read %s\n", debs[idx]);
+ continue;
+ }
+ if (file.Template != 0 && file.ParseInfo() == true)
+ {
+ if (file.DepVer != 0 && *file.DepVer != 0 &&
+ pkgCheckDep(file.DepVer,
+ debconfver, file.DepOp) == false)
+ continue;
+ if (file.PreDepVer != 0 && *file.PreDepVer != 0 &&
+ pkgCheckDep(file.PreDepVer,
+ debconfver, file.PreDepOp) == false)
+ continue;
+
+ writeconfig(file);
+ }
+ }
+
+
+ delete Map;
+ delete DebFile::Cache;
+
+ return 0;
+}
--- /dev/null
+#include <stdio.h>
+#include <apt-pkg/tagfile.h>
+#include <apt-pkg/extracttar.h>
+#include <apt-pkg/arfile.h>
+#include <apt-pkg/pkgcache.h>
+
+#include "debfile.h"
+
+pkgCache *DebFile::Cache = 0;
+
+DebFile::DebFile(const char *debfile)
+ : File(debfile, FileFd::ReadOnly), Control(0), Package(0), Version(0), DepVer(0), PreDepVer(0), DepOp(0), PreDepOp(0), Config(0), Template(0), Which(None)
+{
+}
+
+DebFile::~DebFile()
+{
+ delete [] Control;
+ delete [] Config;
+ delete [] Template;
+}
+
+char *DebFile::GetInstalledVer(const char *package)
+{
+ char *ver = 0;
+
+ pkgCache::PkgIterator Pkg = Cache->FindPkg(package);
+ if (Pkg.end() == false)
+ {
+ pkgCache::VerIterator V = Pkg.CurrentVer();
+ if (V.end() == false)
+ {
+ ver = strdup(V.VerStr());
+ }
+ }
+
+ return ver;
+}
+
+bool DebFile::Go()
+{
+ ARArchive AR(File);
+ const ARArchive::Member *Member = AR.FindMember("control.tar.gz");
+ if (Member == 0)
+ {
+ fprintf(stderr, "This is not a valid DEB archive.\n");
+ return false;
+ }
+
+ if (File.Seek(Member->Start) == false)
+ {
+ return false;
+ }
+
+ ExtractTar Tar(File, Member->Size);
+ return Tar.Go(*this);
+}
+
+bool DebFile::DoItem(Item &I, int &Fd)
+{
+ if (strcmp(I.Name, "control") == 0)
+ {
+ delete [] Control;
+ Control = new char[I.Size+1];
+ Control[I.Size] = 0;
+ Which = IsControl;
+ ControlLen = I.Size;
+ // make it call the Process method below. this is so evil
+ Fd = -2;
+ }
+ else if (strcmp(I.Name, "config") == 0)
+ {
+ delete [] Config;
+ Config = new char[I.Size+1];
+ Config[I.Size] = 0;
+ Which = IsConfig;
+ Fd = -2;
+ }
+ else if (strcmp(I.Name, "templates") == 0)
+ {
+ delete [] Template;
+ Template = new char[I.Size+1];
+ Template[I.Size] = 0;
+ Which = IsTemplate;
+ Fd = -2;
+ }
+ else
+ {
+ Fd = -1;
+ }
+ return true;
+}
+
+bool DebFile::Process(Item &I, const unsigned char *data,
+ unsigned long size, unsigned long pos)
+{
+ switch (Which)
+ {
+ case IsControl:
+ memcpy(Control + pos, data, size);
+ break;
+ case IsConfig:
+ memcpy(Config + pos, data, size);
+ break;
+ case IsTemplate:
+ memcpy(Template + pos, data, size);
+ break;
+ default: /* throw it away */ ;
+ }
+ return true;
+}
+
+bool DebFile::ParseInfo()
+{
+ if (Control == NULL) return false;
+ pkgTagSection Section;
+ Section.Scan(Control, ControlLen);
+
+ const char *pkgtmp = Section.FindS("Package").c_str();
+ Package = CopyString(pkgtmp, strlen(pkgtmp));
+ Version = GetInstalledVer(Package);
+
+ const char *Start, *Stop;
+ if (Section.Find("Depends", Start, Stop) == true)
+ {
+ while (1)
+ {
+ char *P = 0, *V = 0;
+ unsigned int Op;
+ Start = ParseDepends(Start, Stop, P, V, Op);
+ if (Start == 0) return false;
+ if (strcmp(P, "debconf") == 0)
+ {
+ DepVer = V;
+ DepOp = Op;
+ delete[] P;
+ break;
+ }
+ else
+ {
+ delete[] P;
+ delete[] V;
+ }
+ if (Start == Stop) break;
+ }
+ }
+
+ if (Section.Find("Pre-Depends", Start, Stop) == true)
+ {
+ while (1)
+ {
+ char *P = 0, *V = 0;
+ unsigned int Op;
+ Start = ParseDepends(Start, Stop, P, V, Op);
+ if (Start == 0) return false;
+ if (strcmp(P, "debconf") == 0)
+ {
+ PreDepVer = V;
+ PreDepOp = Op;
+ delete[] P;
+ break;
+ }
+ else
+ {
+ delete[] P;
+ delete[] V;
+ }
+ if (Start == Stop) break;
+ }
+ }
+
+ return true;
+}
+
+char *DebFile::CopyString(const char *start, unsigned int len)
+{
+ char *s = new char[len + 1];
+ s[len] = 0;
+ memcpy(s, start, len);
+ return s;
+}
+
+const char *DebFile::ParseDepends(const char *Start,const char *Stop,
+ char *&Package, char *&Ver,
+ unsigned int &Op)
+{
+ // Strip off leading space
+ for (;Start != Stop && isspace(*Start) != 0; Start++);
+
+ // Parse off the package name
+ const char *I = Start;
+ for (;I != Stop && isspace(*I) == 0 && *I != '(' && *I != ')' &&
+ *I != ',' && *I != '|'; I++);
+
+ // Malformed, no '('
+ if (I != Stop && *I == ')')
+ return 0;
+
+ if (I == Start)
+ return 0;
+
+ // Stash the package name
+ Package = CopyString(Start, I - Start);
+
+ // Skip white space to the '('
+ for (;I != Stop && isspace(*I) != 0 ; I++);
+
+ // Parse a version
+ if (I != Stop && *I == '(')
+ {
+ // Skip the '('
+ for (I++; I != Stop && isspace(*I) != 0 ; I++);
+ if (I + 3 >= Stop)
+ return 0;
+
+ // Determine the operator
+ switch (*I)
+ {
+ case '<':
+ I++;
+ if (*I == '=')
+ {
+ I++;
+ Op = pkgCache::Dep::LessEq;
+ break;
+ }
+
+ if (*I == '<')
+ {
+ I++;
+ Op = pkgCache::Dep::Less;
+ break;
+ }
+
+ // < is the same as <= and << is really Cs < for some reason
+ Op = pkgCache::Dep::LessEq;
+ break;
+
+ case '>':
+ I++;
+ if (*I == '=')
+ {
+ I++;
+ Op = pkgCache::Dep::GreaterEq;
+ break;
+ }
+
+ if (*I == '>')
+ {
+ I++;
+ Op = pkgCache::Dep::Greater;
+ break;
+ }
+
+ // > is the same as >= and >> is really Cs > for some reason
+ Op = pkgCache::Dep::GreaterEq;
+ break;
+
+ case '=':
+ Op = pkgCache::Dep::Equals;
+ I++;
+ break;
+
+ // HACK around bad package definitions
+ default:
+ Op = pkgCache::Dep::Equals;
+ break;
+ }
+
+ // Skip whitespace
+ for (;I != Stop && isspace(*I) != 0; I++);
+ Start = I;
+ for (;I != Stop && *I != ')'; I++);
+ if (I == Stop || Start == I)
+ return 0;
+
+ // Skip trailing whitespace
+ const char *End = I;
+ for (; End > Start && isspace(End[-1]); End--);
+
+ Ver = CopyString(Start, End - Start);
+ I++;
+ }
+ else
+ {
+ Ver = CopyString("", 0);
+ Op = pkgCache::Dep::NoOp;
+ }
+
+ // Skip whitespace
+ for (;I != Stop && isspace(*I) != 0; I++);
+
+ if (I != Stop && *I == '|')
+ Op |= pkgCache::Dep::Or;
+
+ if (I == Stop || *I == ',' || *I == '|')
+ {
+ if (I != Stop)
+ for (I++; I != Stop && isspace(*I) != 0; I++);
+ return I;
+ }
+
+ return 0;
+}
--- /dev/null
+#ifndef _debfile_H
+#define _debfile_H
+
+#include <apt-pkg/fileutl.h>
+#include <apt-pkg/pkgcache.h>
+#include <apt-pkg/dirstream.h>
+
+class DebFile : public pkgDirStream
+{
+ const char *ParseDepends(const char *Start,const char *Stop,
+ char *&Package, char *&Ver,
+ unsigned int &Op);
+
+ char *CopyString(const char *start, unsigned int len);
+
+ FileFd File;
+ unsigned long Size;
+ char *Control;
+ unsigned long ControlLen;
+
+public:
+ DebFile(const char *FileName);
+ ~DebFile();
+ bool DoItem(Item &I, int &fd);
+ bool Process(pkgDirStream::Item &I, const unsigned char *data,
+ unsigned long size, unsigned long pos);
+
+ bool Go();
+ bool ParseInfo();
+
+ static char *GetInstalledVer(const char *package);
+
+ char *Package;
+ char *Version;
+ char *DepVer, *PreDepVer;
+ unsigned int DepOp, PreDepOp;
+
+ char *Config;
+ char *Template;
+
+ static pkgCache *Cache;
+ enum { None, IsControl, IsConfig, IsTemplate } Which;
+};
+
+#endif
projects / apt.git / commitdiff
