+++ /dev/null
-//===- SystemUtils.h - Utilities to do low-level system stuff --*- C++ -*--===//
-//
-// This file contains functions used to do a variety of low-level, often
-// system-specific, tasks.
-//
-//===----------------------------------------------------------------------===//
-
-#include "SystemUtils.h"
-#include <algorithm>
-#include <fstream>
-#include <iostream>
-#include <cstdlib>
-#include "Config/sys/types.h"
-#include "Config/sys/stat.h"
-#include "Config/fcntl.h"
-#include "Config/sys/wait.h"
-#include "Config/unistd.h"
-#include "Config/errno.h"
-
-/// removeFile - Delete the specified file
-///
-void removeFile(const std::string &Filename) {
- std::remove(Filename.c_str());
-}
-
-/// getUniqueFilename - Return a filename with the specified prefix. If the
-/// file does not exist yet, return it, otherwise add a suffix to make it
-/// unique.
-///
-std::string getUniqueFilename(const std::string &FilenameBase) {
- if (!std::ifstream(FilenameBase.c_str()))
- return FilenameBase; // Couldn't open the file? Use it!
-
- // Create a pattern for mkstemp...
- char *FNBuffer = new char[FilenameBase.size()+8];
- strcpy(FNBuffer, FilenameBase.c_str());
- strcpy(FNBuffer+FilenameBase.size(), "-XXXXXX");
-
- // Agree on a temporary file name to use....
- int TempFD;
- if ((TempFD = mkstemp(FNBuffer)) == -1) {
- std::cerr << "bugpoint: ERROR: Cannot create temporary file in the current "
- << " directory!\n";
- exit(1);
- }
-
- // We don't need to hold the temp file descriptor... we will trust that noone
- // will overwrite/delete the file while we are working on it...
- close(TempFD);
- std::string Result(FNBuffer);
- delete[] FNBuffer;
- return Result;
-}
-
-/// isExecutableFile - This function returns true if the filename specified
-/// exists and is executable.
-///
-bool isExecutableFile(const std::string &ExeFileName) {
- struct stat Buf;
- if (stat(ExeFileName.c_str(), &Buf))
- return false; // Must not be executable!
-
- if (!(Buf.st_mode & S_IFREG))
- return false; // Not a regular file?
-
- if (Buf.st_uid == getuid()) // Owner of file?
- return Buf.st_mode & S_IXUSR;
- else if (Buf.st_gid == getgid()) // In group of file?
- return Buf.st_mode & S_IXGRP;
- else // Unrelated to file?
- return Buf.st_mode & S_IXOTH;
-}
-
-
-// FindExecutable - Find a named executable, giving the argv[0] of bugpoint.
-// This assumes the executable is in the same directory as bugpoint itself.
-// If the executable cannot be found, return an empty string.
-//
-std::string FindExecutable(const std::string &ExeName,
- const std::string &BugPointPath) {
- // First check the directory that bugpoint is in. We can do this if
- // BugPointPath contains at least one / character, indicating that it is a
- // relative path to bugpoint itself.
- //
- std::string Result = BugPointPath;
- while (!Result.empty() && Result[Result.size()-1] != '/')
- Result.erase(Result.size()-1, 1);
-
- if (!Result.empty()) {
- Result += ExeName;
- if (isExecutableFile(Result)) return Result; // Found it?
- }
-
- // Okay, if the path to bugpoint didn't tell us anything, try using the PATH
- // environment variable.
- const char *PathStr = getenv("PATH");
- if (PathStr == 0) return "";
-
- // Now we have a colon separated list of directories to search... try them...
- unsigned PathLen = strlen(PathStr);
- while (PathLen) {
- // Find the first colon...
- const char *Colon = std::find(PathStr, PathStr+PathLen, ':');
-
- // Check to see if this first directory contains the executable...
- std::string FilePath = std::string(PathStr, Colon) + '/' + ExeName;
- if (isExecutableFile(FilePath))
- return FilePath; // Found the executable!
-
- // Nope it wasn't in this directory, check the next range!
- PathLen -= Colon-PathStr;
- PathStr = Colon;
- while (*PathStr == ':') { // Advance past colons
- PathStr++;
- PathLen--;
- }
- }
-
- // If we fell out, we ran out of directories in PATH to search, return failure
- return "";
-}
-
-static void RedirectFD(const std::string &File, int FD) {
- if (File.empty()) return; // Noop
-
- // Open the file
- int InFD = open(File.c_str(), FD == 0 ? O_RDONLY : O_WRONLY|O_CREAT, 0666);
- if (InFD == -1) {
- std::cerr << "Error opening file '" << File << "' for "
- << (FD == 0 ? "input" : "output") << "!\n";
- exit(1);
- }
-
- dup2(InFD, FD); // Install it as the requested FD
- close(InFD); // Close the original FD
-}
-
-/// RunProgramWithTimeout - This function executes the specified program, with
-/// the specified null-terminated argument array, with the stdin/out/err fd's
-/// redirected, with a timeout specified on the commandline. This terminates
-/// the calling program if there is an error executing the specified program.
-/// It returns the return value of the program, or -1 if a timeout is detected.
-///
-int RunProgramWithTimeout(const std::string &ProgramPath, const char **Args,
- const std::string &StdInFile,
- const std::string &StdOutFile,
- const std::string &StdErrFile) {
-
- // FIXME: install sigalarm handler here for timeout...
-
- int Child = fork();
- switch (Child) {
- case -1:
- std::cerr << "ERROR forking!\n";
- exit(1);
- case 0: // Child
- RedirectFD(StdInFile, 0); // Redirect file descriptors...
- RedirectFD(StdOutFile, 1);
- RedirectFD(StdErrFile, 2);
-
- execv(ProgramPath.c_str(), (char *const *)Args);
- std::cerr << "Error executing program '" << ProgramPath;
- for (; *Args; ++Args)
- std::cerr << " " << *Args;
- exit(1);
-
- default: break;
- }
-
- // Make sure all output has been written while waiting
- std::cout << std::flush;
-
- int Status;
- if (wait(&Status) != Child) {
- if (errno == EINTR) {
- static bool FirstTimeout = true;
- if (FirstTimeout) {
- std::cout <<
- "*** Program execution timed out! This mechanism is designed to handle\n"
- " programs stuck in infinite loops gracefully. The -timeout option\n"
- " can be used to change the timeout threshold or disable it completely\n"
- " (with -timeout=0). This message is only displayed once.\n";
- FirstTimeout = false;
- }
- return -1; // Timeout detected
- }
-
- std::cerr << "Error waiting for child process!\n";
- exit(1);
- }
- return Status;
-}
+++ /dev/null
-//===- SystemUtils.h - Utilities to do low-level system stuff --*- C++ -*--===//
-//
-// This file contains functions used to do a variety of low-level, often
-// system-specific, tasks.
-//
-//===----------------------------------------------------------------------===//
-
-#ifndef SYSTEMUTILS_H
-#define SYSTEMUTILS_H
-
-#include <string>
-
-/// isExecutableFile - This function returns true if the filename specified
-/// exists and is executable.
-///
-bool isExecutableFile(const std::string &ExeFileName);
-
-// FindExecutable - Find a named executable, giving the argv[0] of bugpoint.
-// This assumes the executable is in the same directory as bugpoint itself.
-// If the executable cannot be found, return an empty string.
-//
-std::string FindExecutable(const std::string &ExeName,
- const std::string &BugPointPath);
-
-/// removeFile - Delete the specified file
-///
-void removeFile(const std::string &Filename);
-
-/// getUniqueFilename - Return a filename with the specified prefix. If the
-/// file does not exist yet, return it, otherwise add a suffix to make it
-/// unique.
-///
-std::string getUniqueFilename(const std::string &FilenameBase);
-
-/// RunProgramWithTimeout - This function executes the specified program, with
-/// the specified null-terminated argument array, with the stdin/out/err fd's
-/// redirected, with a timeout specified on the commandline. This terminates
-/// the calling program if there is an error executing the specified program.
-/// It returns the return value of the program, or -1 if a timeout is detected.
-///
-int RunProgramWithTimeout(const std::string &ProgramPath, const char **Args,
- const std::string &StdInFile = "",
- const std::string &StdOutFile = "",
- const std::string &StdErrFile = "");
-
-#endif
projects / oota-llvm.git / commitdiff