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ircd::fs::fd: Fix constructor exception safety; cleanup.

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This commit is contained in:
Jason Volk 2020-05-20 17:56:21 -07:00
parent 24707647b5
commit 56219f9eaa
1 changed files with 24 additions and 15 deletions
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39
ircd/fs.cc
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@ -2006,26 +2006,19 @@ ircd::fs::fd::fd(const string_view &path)
ircd::fs::fd::fd(const string_view &path,
const opts &opts)
try
:fdno{[&path, &opts]
() -> int
:fdno{-1}
{
const prof::syscall_usage_warning message
const mode_t mode
{
"fs::fs::fd(): open(2): %s", path
mode_t(opts.mask)
};
uint flags(opts.flags);
flags |= opts.direct? O_DIRECT : 0UL;
flags |= opts.cloexec? O_CLOEXEC : 0UL;
flags &= opts.nocreate? ~O_CREAT : flags;
flags |= !opts.blocking? O_NONBLOCK : 0UL;
const uint &flags
{
fs::flags(opts)
};
const mode_t &mode(opts.mask);
assert((flags & ~O_CREAT) || mode != 0);
return syscall(::open, path_cstr(path), flags, mode);
}()}
{
const int advise
const int &advise
{
opts.direct?
0:
@ -2038,6 +2031,14 @@ try
0
};
const prof::syscall_usage_warning message
{
"fs::fs::fd(): open(2): %s", path
};
assert((flags & ~O_CREAT) || mode != 0);
fdno = syscall(::open, path_cstr(path), flags, mode);
if(advise)
fs::advise(*this, advise);
@ -2052,6 +2053,14 @@ catch(const std::system_error &e)
path,
e.what(),
};
this->~fd();
throw;
}
catch(...)
{
this->~fd();
throw;
}
ircd::fs::fd::fd(fd &&o)