mirror of
https://github.com/trapexit/mergerfs.git
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b3b8e793f9
* Provides: slight improvement in performance as it no longer will need to find and then act on the files. * It doesn't make sense to support all original policy types. Most people used 'newest' or 'ff' and 'combine' is a better default which has same runtime as 'newest' but with better output.
104 lines
2.1 KiB
C++
104 lines
2.1 KiB
C++
#include "func_readlink_ff.hpp"
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#include "error.hpp"
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#include "fs_readlink.hpp"
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#include "fs_lstat.hpp"
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#include "symlinkify.hpp"
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#include <cstring>
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std::string_view
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Func2::ReadlinkFF::name() const
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{
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return "ff";
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}
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static
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int
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_readlink_symlinkify(const Branches &branches_,
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const fs::path &fusepath_,
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char *buf_,
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const size_t bufsize_,
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const time_t symlinkify_timeout_)
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{
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int rv;
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Err err;
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struct stat st;
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fs::path fullpath;
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for(const auto &branch : branches_)
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{
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fullpath = branch.path / fusepath_;
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err = rv = fs::lstat(fullpath,&st);
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if(rv < 0)
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continue;
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if(not symlinkify::can_be_symlink(st,symlinkify_timeout_))
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{
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err = rv = fs::readlink(fusepath_,buf_,bufsize_);
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if(rv < 0)
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continue;
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buf_[rv] = '\0';
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return 0;
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}
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strncpy(buf_,fullpath.c_str(),bufsize_);
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return 0;
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}
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return err;
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}
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static
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int
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_readlink(const Branches &branches_,
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const fs::path &fusepath_,
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char *buf_,
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const size_t bufsize_)
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{
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int rv;
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Err err;
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fs::path fullpath;
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for(const auto &branch : branches_)
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{
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fullpath = branch.path / fusepath_;
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err = rv = fs::readlink(fusepath_,buf_,bufsize_);
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if(rv < 0)
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continue;
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buf_[rv] = '\0';
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return 0;
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}
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return err;
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}
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int
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Func2::ReadlinkFF::operator()(const Branches &branches_,
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const fs::path &fusepath_,
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char *buf_,
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const size_t bufsize_,
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const time_t symlinkify_timeout_)
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{
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if(symlinkify_timeout_ > 0)
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return ::_readlink_symlinkify(branches_,
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fusepath_,
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buf_,
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bufsize_,
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symlinkify_timeout_);
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return ::_readlink(branches_,
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fusepath_,
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buf_,
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bufsize_);
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}
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