#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(int status_fd)
+/* 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",8*1024);
unsigned int MaxArgBytes = _config->FindI("Dpkg::MaxArgBytes",32*1024);
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 for remove with config %s")},
+ {"not-installed", _("Removed with config %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;
}
}
- // if we got a status_fd argument, we pass it to apt
char status_fd_buf[20];
- if(status_fd > 0)
- {
- Args[n++] = "--status-fd";
- Size += strlen(Args[n-1]);
- snprintf(status_fd_buf,20,"%i",status_fd);
- Args[n++] = status_fd_buf;
- Size += strlen(Args[n-1]);
- }
+ 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)
{
it doesn't die but we do! So we must also ignore it */
sighandler_t old_SIGQUIT = signal(SIGQUIT,SIG_IGN);
sighandler_t old_SIGINT = signal(SIGINT,SIG_IGN);
-
- // Fork dpkg
+
+ // Fork dpkg
pid_t Child;
- if(status_fd > 0)
- Child = ExecFork(status_fd);
- else
- Child = ExecFork();
+ _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);
_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");
+ }
+
+ // 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;
+
+ // pass "error" and "conffile-prompt" messages from dpkg verbatim
+ if((strncmp(line,"error",strlen("error")) == 0) ||
+ (strncmp(line,"conffile-prompt",strlen("conffile-prompt")) == 0))
+ {
+ write(OutStatusFd, line, strlen(line));
+ line[0]=0;
+ continue;
+ }
+ // line contains the dpkg status info now. it has the form:
+ // 'status: <pkg>: <pkg qstate>' (see dpkg(1) for details)
+ char* list[5];
+ TokSplitString(':', line, list, 5);
+ char *pkg = list[1];
+ char *action = list[2];
+ 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++;
+ ostringstream status;
+ // 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 to fd: '" << status.str()
+ << "'" << std::endl;
+
+ }
+
+ }
+ if (_config->FindB("Debug::pkgDPkgProgressReporting",false) == true)
+ std::clog << "(parsed from dpkg) pkg: " << pkg
+ << " action: " << action << endl;
- // Restore sig int/quit
- signal(SIGQUIT,old_SIGQUIT);
- signal(SIGINT,old_SIGINT);
- return _error->Errno("waitpid","Couldn't wait for subprocess");
+ // reset the line buffer
+ line[0]=0;
}
+ close(_dpkgin);
// Restore sig int/quit
signal(SIGQUIT,old_SIGQUIT);
projects / apt.git / blobdiff