// -*- mode: cpp; mode: fold -*-
// Description /*{{{*/
-// $Id: dpkgpm.cc,v 1.26 2003/04/27 03:02:40 doogie Exp $
+// $Id: dpkgpm.cc,v 1.28 2004/01/27 02:25:01 mdz Exp $
/* ######################################################################
DPKG Package Manager - Provide an interface to dpkg
#include <signal.h>
#include <errno.h>
#include <stdio.h>
-#include <iostream>
+#include <sstream>
+#include <map>
+
+#include <config.h>
+#include <apti18n.h>
/*}}}*/
using namespace std;
/*}}}*/
// DPkgPM::Go - Run the sequence /*{{{*/
// ---------------------------------------------------------------------
-/* This globs the operations and calls dpkg */
-bool pkgDPkgPM::Go()
+/* This globs the operations and calls dpkg
+ *
+ * If it is called with "OutStatusFd" set to a valid file descriptor
+ * apt will report the install progress over this fd. It maps the
+ * dpkg states a package goes through to human readable (and i10n-able)
+ * names and calculates a percentage for each step.
+*/
+bool pkgDPkgPM::Go(int OutStatusFd)
{
- unsigned int MaxArgs = _config->FindI("Dpkg::MaxArgs",350);
- unsigned int MaxArgBytes = _config->FindI("Dpkg::MaxArgBytes",8192);
+ unsigned int MaxArgs = _config->FindI("Dpkg::MaxArgs",8*1024);
+ unsigned int MaxArgBytes = _config->FindI("Dpkg::MaxArgBytes",32*1024);
if (RunScripts("DPkg::Pre-Invoke") == false)
return false;
if (RunScriptsWithPkgs("DPkg::Pre-Install-Pkgs") == false)
return false;
+
+ // prepare the progress reporting
+ int Done = 0;
+ int Total = 0;
+ // map the dpkg states to the operations that are performed
+ // (this is sorted in the same way as Item::Ops)
+ static const struct DpkgState DpkgStatesOpMap[][5] = {
+ // Install operation
+ {
+ {"half-installed", _("Preparing %s")},
+ {"unpacked", _("Unpacking %s") },
+ {NULL, NULL}
+ },
+ // Configure operation
+ {
+ {"unpacked",_("Preparing to configure %s") },
+ {"half-configured", _("Configuring %s") },
+ { "installed", _("Installed %s")},
+ {NULL, NULL}
+ },
+ // Remove operation
+ {
+ {"half-configured", _("Preparing for removal of %s")},
+ {"half-installed", _("Removing %s")},
+ {"config-files", _("Removed %s")},
+ {NULL, NULL}
+ },
+ // Purge operation
+ {
+ {"config-files", _("Preparing to completely remove %s")},
+ {"not-installed", _("Completely removed %s")},
+ {NULL, NULL}
+ },
+ };
+ // the dpkg states that the pkg will run through, the string is
+ // the package, the vector contains the dpkg states that the package
+ // will go through
+ map<string,vector<struct DpkgState> > PackageOps;
+ // the dpkg states that are already done; the string is the package
+ // the int is the state that is already done (e.g. a package that is
+ // going to be install is already in state "half-installed")
+ map<string,int> PackageOpsDone;
+
+ // init the PackageOps map, go over the list of packages that
+ // that will be [installed|configured|removed|purged] and add
+ // them to the PackageOps map (the dpkg states it goes through)
+ // and the PackageOpsTranslations (human readable strings)
+ for (vector<Item>::iterator I = List.begin(); I != List.end();I++)
+ {
+ string name = (*I).Pkg.Name();
+ PackageOpsDone[name] = 0;
+ for(int i=0; (DpkgStatesOpMap[(*I).Op][i]).state != NULL; i++)
+ {
+ PackageOps[name].push_back(DpkgStatesOpMap[(*I).Op][i]);
+ Total++;
+ }
+ }
+
+ // this loop is runs once per operation
for (vector<Item>::iterator I = List.begin(); I != List.end();)
{
vector<Item>::iterator J = I;
}
}
+ char status_fd_buf[20];
+ int fd[2];
+ pipe(fd);
+
+ Args[n++] = "--status-fd";
+ Size += strlen(Args[n-1]);
+ snprintf(status_fd_buf,sizeof(status_fd_buf),"%i", fd[1]);
+ Args[n++] = status_fd_buf;
+ Size += strlen(Args[n-1]);
+
switch (I->Op)
{
case Item::Remove:
it forks scripts. What happens is that when you hit ctrl-c it sends
it to all processes in the group. Since dpkg ignores the signal
it doesn't die but we do! So we must also ignore it */
- signal(SIGQUIT,SIG_IGN);
- signal(SIGINT,SIG_IGN);
-
- // Fork dpkg
- pid_t Child = ExecFork();
+ sighandler_t old_SIGQUIT = signal(SIGQUIT,SIG_IGN);
+ sighandler_t old_SIGINT = signal(SIGINT,SIG_IGN);
+
+ // Fork dpkg
+ pid_t Child;
+ _config->Set("APT::Keep-Fds::",fd[1]);
+ Child = ExecFork();
// This is the child
if (Child == 0)
{
+ close(fd[0]); // close the read end of the pipe
+
if (chdir(_config->FindDir("DPkg::Run-Directory","/").c_str()) != 0)
_exit(100);
- if (_config->FindB("DPkg::FlushSTDIN",true) == true)
+ if (_config->FindB("DPkg::FlushSTDIN",true) == true && isatty(STDIN_FILENO))
{
int Flags,dummy;
if ((Flags = fcntl(STDIN_FILENO,F_GETFL,dummy)) < 0)
_exit(100);
}
+ // clear the Keep-Fd again
+ _config->Clear("APT::Keep-Fds",fd[1]);
+
// Wait for dpkg
int Status = 0;
- while (waitpid(Child,&Status,0) != Child)
- {
- if (errno == EINTR)
+
+ // we read from dpkg here
+ int _dpkgin = fd[0];
+ fcntl(_dpkgin, F_SETFL, O_NONBLOCK);
+ close(fd[1]); // close the write end of the pipe
+
+ // the read buffers for the communication with dpkg
+ char line[1024] = {0,};
+ char buf[2] = {0,0};
+
+ // the result of the waitpid call
+ int res;
+
+ while ((res=waitpid(Child,&Status, WNOHANG)) != Child) {
+ if(res < 0) {
+ // FIXME: move this to a function or something, looks ugly here
+ // error handling, waitpid returned -1
+ if (errno == EINTR)
+ continue;
+ RunScripts("DPkg::Post-Invoke");
+
+ // Restore sig int/quit
+ signal(SIGQUIT,old_SIGQUIT);
+ signal(SIGINT,old_SIGINT);
+ return _error->Errno("waitpid","Couldn't wait for subprocess");
+ }
+
+ // read a single char, make sure that the read can't block
+ // (otherwise we may leave zombies)
+ int len = read(_dpkgin, buf, 1);
+
+ // nothing to read, wait a bit for more
+ if(len <= 0)
+ {
+ usleep(1000);
continue;
- RunScripts("DPkg::Post-Invoke");
- return _error->Errno("waitpid","Couldn't wait for subprocess");
+ }
+
+ // sanity check (should never happen)
+ if(strlen(line) >= sizeof(line)-10)
+ {
+ _error->Error("got a overlong line from dpkg: '%s'",line);
+ line[0]=0;
+ }
+ // append to line, check if we got a complete line
+ strcat(line, buf);
+ if(buf[0] != '\n')
+ continue;
+
+ if (_config->FindB("Debug::pkgDPkgProgressReporting",false) == true)
+ std::clog << "got from dpkg '" << line << "'" << std::endl;
+
+ // the status we output
+ ostringstream status;
+
+ /* dpkg sends strings like this:
+ 'status: <pkg>: <pkg qstate>'
+ errors look like this:
+ 'status: /var/cache/apt/archives/krecipes_0.8.1-0ubuntu1_i386.deb : error : trying to overwrite `/usr/share/doc/kde/HTML/en/krecipes/krectip.png', which is also in package krecipes-data
+ and conffile-prompt like this
+ 'status: conffile-prompt: conffile : 'current-conffile' 'new-conffile' useredited distedited
+
+ */
+ char* list[5];
+ if(!TokSplitString(':', line, list, sizeof(list)/sizeof(list[0])))
+ // FIXME: dpkg sends multiline error messages sometimes (see
+ // #374195 for a example. we should support this by
+ // either patching dpkg to not send multiline over the
+ // statusfd or by rewriting the code here to deal with
+ // it. for now we just ignore it and not crash
+ continue;
+ char *pkg = list[1];
+ char *action = _strstrip(list[2]);
+
+ if(strncmp(action,"error",strlen("error")) == 0)
+ {
+ status << "pmerror:" << list[1]
+ << ":" << (Done/float(Total)*100.0)
+ << ":" << list[3]
+ << endl;
+ if(OutStatusFd > 0)
+ write(OutStatusFd, status.str().c_str(), status.str().size());
+ line[0]=0;
+ if (_config->FindB("Debug::pkgDPkgProgressReporting",false) == true)
+ std::clog << "send: '" << status.str() << "'" << endl;
+ continue;
+ }
+ if(strncmp(action,"conffile",strlen("conffile")) == 0)
+ {
+ status << "pmconffile:" << list[1]
+ << ":" << (Done/float(Total)*100.0)
+ << ":" << list[3]
+ << endl;
+ if(OutStatusFd > 0)
+ write(OutStatusFd, status.str().c_str(), status.str().size());
+ line[0]=0;
+ if (_config->FindB("Debug::pkgDPkgProgressReporting",false) == true)
+ std::clog << "send: '" << status.str() << "'" << endl;
+ continue;
+ }
+
+ vector<struct DpkgState> &states = PackageOps[pkg];
+ const char *next_action = NULL;
+ if(PackageOpsDone[pkg] < states.size())
+ next_action = states[PackageOpsDone[pkg]].state;
+ // check if the package moved to the next dpkg state
+ if(next_action && (strcmp(action, next_action) == 0))
+ {
+ // only read the translation if there is actually a next
+ // action
+ const char *translation = states[PackageOpsDone[pkg]].str;
+ char s[200];
+ snprintf(s, sizeof(s), translation, pkg);
+
+ // we moved from one dpkg state to a new one, report that
+ PackageOpsDone[pkg]++;
+ Done++;
+ // build the status str
+ status << "pmstatus:" << pkg
+ << ":" << (Done/float(Total)*100.0)
+ << ":" << s
+ << endl;
+ if(OutStatusFd > 0)
+ write(OutStatusFd, status.str().c_str(), status.str().size());
+ if (_config->FindB("Debug::pkgDPkgProgressReporting",false) == true)
+ std::clog << "send: '" << status.str() << "'" << endl;
+
+ }
+ if (_config->FindB("Debug::pkgDPkgProgressReporting",false) == true)
+ std::clog << "(parsed from dpkg) pkg: " << pkg
+ << " action: " << action << endl;
+
+ // reset the line buffer
+ line[0]=0;
}
+ close(_dpkgin);
// Restore sig int/quit
- signal(SIGQUIT,SIG_DFL);
- signal(SIGINT,SIG_DFL);
+ signal(SIGQUIT,old_SIGQUIT);
+ signal(SIGINT,old_SIGINT);
// Check for an error code.
if (WIFEXITED(Status) == 0 || WEXITSTATUS(Status) != 0)
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