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/* latte_system.cpp -- Interface to system utilities
Copyright 2006 Matthias Koeppe
This file is part of LattE.
LattE is free software; you can redistribute it and/or modify it
under the terms of the version 2 of the GNU General Public License
as published by the Free Software Foundation.
LattE is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
General Public License for more details.
You should have received a copy of the GNU General Public License
along with LattE; if not, write to the Free Software Foundation,
Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
*/
#include <cstdlib>
#include <cstdio>
#include <iostream>
#include <cassert>
#include <climits>
#include <sys/stat.h>
#include <sys/types.h>
#include <unistd.h>
#include <errno.h>
using namespace std;
#include "latte_system.h"
void system_with_error_check(const char *command)
{
int status = system(command);
if (status != 0) {
cerr << "Command `" << command << "' returned with exit status "
<< status << "." << endl;
exit(1);
}
}
void system_with_error_check(const string &command)
{
system_with_error_check(command.c_str());
}
string shell_quote(const string &argument)
{
// Quote unless all characters in ARGUMENT are from a very
// conservative character set. We don't use the <ctype> functions
// because they are locale-dependent.
std::size_t found = argument.find_first_not_of("abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789_-+/.");
if (found!=string::npos) {
string result;
result.push_back('\'');
for (string::const_iterator i = argument.begin(); i!=argument.end(); ++i) {
if (*i == '\'')
result.push_back('\\');
result.push_back(*i);
}
result.push_back('\'');
return result;
}
else
return argument;
}
void
rename_with_error_check(const string &old_name, const string &new_name)
{
int status = rename(old_name.c_str(), new_name.c_str());
if (status != 0) {
cerr << "Renaming file `" << old_name << "' to `" << new_name << "' failed, errno: " << errno << "." << endl;
exit(1);
}
}
static bool created_temp_dir = false;
static string temp_dir;
#ifndef HOST_NAME_MAX
#define HOST_NAME_MAX 1023
#endif
void create_temporary_directory()
{
char hostname[HOST_NAME_MAX + 1];
if (gethostname(hostname, HOST_NAME_MAX + 1) != 0) {
perror("create_temporary_directory: gethostname failed");
exit(1);
}
pid_t pid = getpid();
int i;
char t[PATH_MAX];
for (i = 0; i<INT_MAX; i++) {
sprintf(t, "/tmp/latte-%d@%s-%d", pid, hostname, i);
int result = mkdir(t, 0700);
if (result == 0) {
created_temp_dir = true;
temp_dir = t;
temp_dir += "/";
return;
}
else {
if (errno == EEXIST) continue;
perror("create_temporary_directory: mkdir failed");
exit(1);
}
}
cerr << "create_temporary_directory: Unable to create a fresh directory" << endl;
exit(1);
}
const string &temporary_directory_name()
{
if (!created_temp_dir)
create_temporary_directory();
return temp_dir;
}
void remove_temporary_directory()
{
if (created_temp_dir) {
char command[PATH_MAX + 10];
sprintf(command, "rm -rf %s", temp_dir.c_str());
system_with_error_check(command);
}
}
string temporary_file_name(const string &name)
{
return temporary_directory_name() + name;
}
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