309 lines
6.6 KiB
C++
309 lines
6.6 KiB
C++
#ifndef __UTIL_H
|
|
#define __UTIL_H
|
|
|
|
#include <string>
|
|
#include <list>
|
|
#include <set>
|
|
#include <sstream>
|
|
|
|
#include <sys/types.h>
|
|
#include <dirent.h>
|
|
#include <unistd.h>
|
|
#include <signal.h>
|
|
|
|
#include <boost/format.hpp>
|
|
|
|
using namespace std;
|
|
using namespace boost;
|
|
|
|
|
|
class Error : public exception
|
|
{
|
|
protected:
|
|
string err;
|
|
public:
|
|
Error(const format & f);
|
|
~Error() throw () { };
|
|
const char * what() const throw () { return err.c_str(); }
|
|
const string & msg() const throw () { return err; }
|
|
Error & addPrefix(const format & f);
|
|
};
|
|
|
|
class SysError : public Error
|
|
{
|
|
public:
|
|
SysError(const format & f);
|
|
};
|
|
|
|
#define MakeError(newClass, superClass) \
|
|
class newClass : public superClass \
|
|
{ \
|
|
public: \
|
|
newClass(const format & f) : superClass(f) { }; \
|
|
};
|
|
|
|
MakeError(UsageError, Error)
|
|
|
|
|
|
typedef list<string> Strings;
|
|
typedef set<string> StringSet;
|
|
|
|
|
|
/* Paths are just strings. */
|
|
typedef string Path;
|
|
typedef list<Path> Paths;
|
|
typedef set<Path> PathSet;
|
|
|
|
|
|
/* Return an environment variable. */
|
|
string getEnv(const string & key, const string & def = "");
|
|
|
|
/* Return an absolutized path, resolving paths relative to the
|
|
specified directory, or the current directory otherwise. The path
|
|
is also canonicalised. */
|
|
Path absPath(Path path, Path dir = "");
|
|
|
|
/* Canonicalise a path by removing all `.' or `..' components and
|
|
double or trailing slashes. Optionally resolves all symlink
|
|
components such that each component of the resulting path is *not*
|
|
a symbolic link. */
|
|
Path canonPath(const Path & path, bool resolveSymlinks = false);
|
|
|
|
/* Return the directory part of the given canonical path, i.e.,
|
|
everything before the final `/'. If the path is the root or an
|
|
immediate child thereof (e.g., `/foo'), this means an empty string
|
|
is returned. */
|
|
Path dirOf(const Path & path);
|
|
|
|
/* Return the base name of the given canonical path, i.e., everything
|
|
following the final `/'. */
|
|
string baseNameOf(const Path & path);
|
|
|
|
/* Return true iff the given path exists. */
|
|
bool pathExists(const Path & path);
|
|
|
|
/* Read the contents (target) of a symbolic link. The result is not
|
|
in any way canonicalised. */
|
|
Path readLink(const Path & path);
|
|
|
|
bool isLink(const Path & path);
|
|
|
|
/* Read the contents of a directory. The entries `.' and `..' are
|
|
removed. */
|
|
Strings readDirectory(const Path & path);
|
|
|
|
/* Read the contents of a file into a string. */
|
|
string readFile(int fd);
|
|
string readFile(const Path & path);
|
|
|
|
/* Write a string to a file. */
|
|
void writeFile(const Path & path, const string & s);
|
|
|
|
/* Delete a path; i.e., in the case of a directory, it is deleted
|
|
recursively. Don't use this at home, kids. The second variant
|
|
returns the number of bytes freed. */
|
|
void deletePath(const Path & path);
|
|
|
|
void deletePath(const Path & path, unsigned long long & bytesFreed);
|
|
|
|
/* Make a path read-only recursively. */
|
|
void makePathReadOnly(const Path & path);
|
|
|
|
/* Create a temporary directory. */
|
|
Path createTempDir();
|
|
|
|
/* Create a directory and all its parents, if necessary. */
|
|
void createDirs(const Path & path);
|
|
|
|
/* Create a file and write the given text to it. The file is written
|
|
in binary mode (i.e., no end-of-line conversions). The path should
|
|
not already exist. */
|
|
void writeStringToFile(const Path & path, const string & s);
|
|
|
|
template<class T, class A>
|
|
T singleton(const A & a)
|
|
{
|
|
T t;
|
|
t.insert(a);
|
|
return t;
|
|
}
|
|
|
|
|
|
/* Messages. */
|
|
|
|
|
|
typedef enum {
|
|
ltPretty, /* nice, nested output */
|
|
ltEscapes, /* nesting indicated using escape codes (for log2xml) */
|
|
ltFlat /* no nesting */
|
|
} LogType;
|
|
|
|
typedef enum {
|
|
lvlError,
|
|
lvlInfo,
|
|
lvlTalkative,
|
|
lvlChatty,
|
|
lvlDebug,
|
|
lvlVomit
|
|
} Verbosity;
|
|
|
|
extern LogType logType;
|
|
extern Verbosity verbosity; /* suppress msgs > this */
|
|
|
|
class Nest
|
|
{
|
|
private:
|
|
bool nest;
|
|
public:
|
|
Nest();
|
|
~Nest();
|
|
void open(Verbosity level, const format & f);
|
|
void close();
|
|
};
|
|
|
|
void printMsg_(Verbosity level, const format & f);
|
|
|
|
#define startNest(varName, level, f) \
|
|
Nest varName; \
|
|
if (level <= verbosity) { \
|
|
varName.open(level, (f)); \
|
|
}
|
|
|
|
#define printMsg(level, f) \
|
|
do { \
|
|
if (level <= verbosity) { \
|
|
printMsg_(level, (f)); \
|
|
} \
|
|
} while (0)
|
|
|
|
#define debug(f) printMsg(lvlDebug, f)
|
|
|
|
|
|
/* Wrappers arount read()/write() that read/write exactly the
|
|
requested number of bytes. */
|
|
void readFull(int fd, unsigned char * buf, size_t count);
|
|
void writeFull(int fd, const unsigned char * buf, size_t count);
|
|
|
|
|
|
/* Read a file descriptor until EOF occurs. */
|
|
string drainFD(int fd);
|
|
|
|
|
|
|
|
/* Automatic cleanup of resources. */
|
|
|
|
class AutoDelete
|
|
{
|
|
string path;
|
|
bool del;
|
|
public:
|
|
AutoDelete(const string & p);
|
|
~AutoDelete();
|
|
void cancel();
|
|
};
|
|
|
|
|
|
class AutoCloseFD
|
|
{
|
|
int fd;
|
|
public:
|
|
AutoCloseFD();
|
|
AutoCloseFD(int fd);
|
|
AutoCloseFD(const AutoCloseFD & fd);
|
|
~AutoCloseFD();
|
|
void operator =(int fd);
|
|
operator int() const;
|
|
void close();
|
|
bool isOpen();
|
|
int borrow();
|
|
};
|
|
|
|
|
|
class Pipe
|
|
{
|
|
public:
|
|
AutoCloseFD readSide, writeSide;
|
|
void create();
|
|
};
|
|
|
|
|
|
class AutoCloseDir
|
|
{
|
|
DIR * dir;
|
|
public:
|
|
AutoCloseDir();
|
|
AutoCloseDir(DIR * dir);
|
|
~AutoCloseDir();
|
|
void operator =(DIR * dir);
|
|
operator DIR *();
|
|
};
|
|
|
|
|
|
class Pid
|
|
{
|
|
pid_t pid;
|
|
bool separatePG;
|
|
public:
|
|
Pid();
|
|
~Pid();
|
|
void operator =(pid_t pid);
|
|
operator pid_t();
|
|
void kill();
|
|
int wait(bool block);
|
|
void setSeparatePG(bool separatePG);
|
|
};
|
|
|
|
|
|
/* Run a program and return its stdout in a string (i.e., like the
|
|
shell backtick operator). */
|
|
string runProgram(Path program);
|
|
|
|
/* Wrapper around _exit() on Unix and ExitProcess() on Windows. (On
|
|
Cygwin, _exit() doesn't seem to do the right thing.) */
|
|
void quickExit(int status);
|
|
|
|
|
|
/* User interruption. */
|
|
|
|
extern volatile sig_atomic_t _isInterrupted;
|
|
|
|
void _interrupted();
|
|
|
|
void inline checkInterrupt()
|
|
{
|
|
if (_isInterrupted) _interrupted();
|
|
}
|
|
|
|
|
|
/* String packing / unpacking. */
|
|
string packStrings(const Strings & strings);
|
|
Strings unpackStrings(const string & s);
|
|
|
|
|
|
/* String tokenizer. */
|
|
Strings tokenizeString(const string & s, const string & separators = " \t\n\r");
|
|
|
|
|
|
/* Convert the exit status of a child as returned by wait() into an
|
|
error string. */
|
|
string statusToString(int status);
|
|
|
|
bool statusOk(int status);
|
|
|
|
|
|
/* Parse a string into an integer. */
|
|
bool string2Int(const string & s, int & n);
|
|
|
|
|
|
/* !!! HACK HACK HACK - this should be in shared.hh, but it's to
|
|
facilitate a quick hack - will remove this eventually (famous last
|
|
words). */
|
|
struct SwitchToOriginalUser
|
|
{
|
|
SwitchToOriginalUser();
|
|
~SwitchToOriginalUser();
|
|
};
|
|
|
|
|
|
#endif /* !__UTIL_H */
|