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5fe6afc270
This is a relatively invasive change since multiple things needed to
happen at once.
* Socket based logging is removed
* Logging has been replaced to only support stdout, stderr, and server
* Server is now default and replaces what FEXLogServer did
* Server logging now uses a pipe instead of a socket
* Can be faster than stderr and stdout since the application doesn't
need to wait on terminal output
* FEXMountDaemon has been removed
* Functionality has been merged in to FEXServer
* FEXServer is always executed on FEX initialization time
* Similar in behaviour to Wine's wineserver
* Can explicitly start this before using FEX for logging purposes
* Stays around until all instances of FEX exit
* Will stick around for a short amount of time in case of spurious
execution
* FEXServer will soon be extended to do more than logging and squashfs
mounting
* FEX rootfs scripts will need to be updated to support this path
* Just means rbinding the /tmp folder and forcing a FEXServer instance
to be alive
* Pressure-vessel works fine in this case since FEXServer will already
be running
* It already rbinds the host /tmp folder which is why this works
50 lines
1.2 KiB
C++
50 lines
1.2 KiB
C++
#include <cstdlib>
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#include <dirent.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <unistd.h>
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#include <vector>
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namespace PipeScanner {
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std::vector<int> IncomingPipes{};
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// Scan and store any pipe files.
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// This will capture all pipe files so needs to be executed early.
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// This ensures we find any pipe files from execve for waiting FEXInterpreters.
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void ScanForPipes() {
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DIR *fd = opendir("/proc/self/fd");
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if (fd) {
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struct dirent *dir{};
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do {
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dir = readdir(fd);
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if (dir) {
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char *end{};
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int open_fd = std::strtol(dir->d_name, &end, 8);
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if (end != dir->d_name) {
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struct stat stat{};
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int result = fstat(open_fd, &stat);
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if (result == -1) {
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continue;
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}
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if (stat.st_mode & S_IFIFO) {
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// Close any incoming pipes
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IncomingPipes.emplace_back(open_fd);
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}
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}
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}
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} while (dir);
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closedir(fd);
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}
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}
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void ClosePipes() {
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for (auto pipe : IncomingPipes) {
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int Null{0};
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write(pipe, &Null, sizeof(Null));
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close(pipe);
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}
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IncomingPipes.clear();
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}
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}
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