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optimize link_cow eligibility check

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This commit is contained in:
Antonio SJ Musumeci 2019-01-04 10:21:28 -05:00
parent 90e422c113
commit 10f7f8bdea
2 changed files with 21 additions and 5 deletions
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23
src/fs_cow.cpp
View File

@ -60,13 +60,23 @@ namespace fs
{
namespace cow
{
bool
is_eligible(const int flags_)
{
return ((flags_ & O_RDWR) || (flags_ & O_WRONLY));
}
bool
is_eligible(const struct stat &st_)
{
return ((S_ISREG(st_.st_mode)) && (st_.st_nlink > 1));
}
bool
is_eligible(const int flags_,
const struct stat &st_)
{
return (((flags_ & O_RDWR) || (flags_ & O_WRONLY)) &&
(S_ISREG(st_.st_mode)) &&
(st_.st_nlink > 1));
return (is_eligible(flags_) && is_eligible(st_));
}
bool
@ -76,11 +86,14 @@ namespace fs
int rv;
struct stat st;
rv = fs::stat(fullpath_,st);
if(!is_eligible(flags_))
return false;
rv = fs::lstat(fullpath_,st);
if(rv == -1)
return false;
return fs::cow::is_eligible(flags_,st);
return fs::cow::is_eligible(st);
}
int

3
src/fs_cow.hpp
View File

@ -25,7 +25,10 @@ namespace fs
{
namespace cow
{
bool is_eligible(const int flags_);
bool is_eligible(const struct stat &st_);
bool is_eligible(const int flags_, const struct stat &st_);
bool is_eligible(const char *fullpath_, const int flags_);
int break_link(const char *fullpath_);