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Create functions can set branches RO on EROFS

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This commit is contained in:
Antonio SJ Musumeci 2023-07-09 22:42:47 -05:00
parent 36a4b7a23a
commit 707d298d7c
14 changed files with 230 additions and 56 deletions
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67
src/fs_mktemp.cpp
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@ -18,61 +18,74 @@
#include "errno.hpp"
#include "fs_open.hpp"
#include "fs_path.hpp"
#include <limits.h>
#include <cstdlib>
#include <string>
#include <limits.h>
#define PAD_LEN 16
#define MAX_ATTEMPTS 3
using std::string;
static char const CHARS[] = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz";
#define PADLEN 6
#define MAX_ATTEMPTS 10
static
string
generate_tmp_path(const string &base_)
namespace l
{
string tmp;
static
std::string
generate_tmp_path(std::string const base_)
{
fs::Path path;
std::string filename;
tmp = base_;
if((tmp.size() + PADLEN + 1) > PATH_MAX)
tmp.resize(tmp.size() - PADLEN - 1);
tmp += '.';
for(int i = 0; i < PADLEN; i++)
tmp += ('A' + (std::rand() % 26));
filename = '.';
for(int i = 0; i < PAD_LEN; i++)
filename += CHARS[std::rand() % (sizeof(CHARS) - 1)];
return tmp;
path = base_;
path /= filename;
return path.string();
}
}
namespace fs
{
int
mktemp(string *base_,
const int flags_)
std::tuple<int,std::string>
mktemp_in_dir(std::string const dirpath_,
int const flags_)
{
int fd;
int count;
int flags;
string tmppath;
std::string tmp_filepath;
fd = -1;
count = MAX_ATTEMPTS;
flags = (flags_ | O_EXCL | O_CREAT | O_TRUNC);
while(count-- > 0)
{
tmppath = generate_tmp_path(*base_);
tmp_filepath = l::generate_tmp_path(dirpath_);
fd = fs::open(tmppath,flags,S_IWUSR);
fd = fs::open(tmp_filepath,flags,S_IWUSR);
if((fd == -1) && (errno == EEXIST))
continue;
else if(fd != -1)
*base_ = tmppath;
if(fd == -1)
return {-errno,std::string{}};
return fd;
return {fd,tmp_filepath};
}
return (errno=EEXIST,-1);
return {-EEXIST,std::string{}};
}
std::tuple<int,std::string>
mktemp(std::string const filepath_,
int const flags_)
{
ghc::filesystem::path filepath{filepath_};
return fs::mktemp_in_dir(filepath.parent_path(),flags_);
}
}