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-rw-r--r--apt-pkg/deb/debsystem.cc62
1 files changed, 61 insertions, 1 deletions
diff --git a/apt-pkg/deb/debsystem.cc b/apt-pkg/deb/debsystem.cc
index 5353761fc..724312bc5 100644
--- a/apt-pkg/deb/debsystem.cc
+++ b/apt-pkg/deb/debsystem.cc
@@ -304,7 +304,6 @@ void debSystem::DpkgChrootDirectory() /*{{{*/
/*}}}*/
bool debSystem::SupportsMultiArch() /*{{{*/
{
- // Generate the base argument list for dpkg
std::vector<std::string> const Args = GetDpkgBaseCommand();
std::vector<const char *> cArgs(Args.size(), NULL);
std::transform(Args.begin(), Args.end(), cArgs.begin(), [](std::string const &s) { return s.c_str(); });
@@ -343,3 +342,64 @@ bool debSystem::SupportsMultiArch() /*{{{*/
return false;
}
/*}}}*/
+std::vector<std::string> debSystem::SupportedArchitectures() /*{{{*/
+{
+ std::vector<std::string> const sArgs = GetDpkgBaseCommand();
+ std::vector<const char *> Args(sArgs.size(), NULL);
+ std::transform(sArgs.begin(), sArgs.end(), Args.begin(), [](std::string const &s) { return s.c_str(); });
+ Args.push_back("--print-foreign-architectures");
+ Args.push_back(NULL);
+
+ std::vector<std::string> archs;
+ string const arch = _config->Find("APT::Architecture");
+ if (arch.empty() == false)
+ archs.push_back(arch);
+
+ int external[2] = {-1, -1};
+ if (pipe(external) != 0)
+ {
+ _error->WarningE("getArchitecture", "Can't create IPC pipe for dpkg --print-foreign-architectures");
+ return archs;
+ }
+
+ pid_t dpkgMultiArch = ExecFork();
+ if (dpkgMultiArch == 0) {
+ close(external[0]);
+ int const nullfd = open("/dev/null", O_RDONLY);
+ dup2(nullfd, STDIN_FILENO);
+ dup2(external[1], STDOUT_FILENO);
+ dup2(nullfd, STDERR_FILENO);
+ DpkgChrootDirectory();
+ execvp(Args[0], (char**) &Args[0]);
+ _error->WarningE("getArchitecture", "Can't detect foreign architectures supported by dpkg!");
+ _exit(100);
+ }
+ close(external[1]);
+
+ FILE *dpkg = fdopen(external[0], "r");
+ if(dpkg != NULL) {
+ char* buf = NULL;
+ size_t bufsize = 0;
+ while (getline(&buf, &bufsize, dpkg) != -1)
+ {
+ char* tok_saveptr;
+ char* arch = strtok_r(buf, " ", &tok_saveptr);
+ while (arch != NULL) {
+ for (; isspace(*arch) != 0; ++arch);
+ if (arch[0] != '\0') {
+ char const* archend = arch;
+ for (; isspace(*archend) == 0 && *archend != '\0'; ++archend);
+ string a(arch, (archend - arch));
+ if (std::find(archs.begin(), archs.end(), a) == archs.end())
+ archs.push_back(a);
+ }
+ arch = strtok_r(NULL, " ", &tok_saveptr);
+ }
+ }
+ free(buf);
+ fclose(dpkg);
+ }
+ ExecWait(dpkgMultiArch, "dpkg --print-foreign-architectures", true);
+ return archs;
+}
+ /*}}}*/