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Introduce out_is_piped and err_is_piped on io_streams_t

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builtin_eval needs to know whether to set up bufferfills to capture its
output and/or errput; it should do this specifically if the output and
errput is piped (and not, say, directed to a file). In preparation for
this change, add bools to io_streams_t which track whether stdout and
stderr are specifically piped.
This commit is contained in:
ridiculousfish 2020-04-28 09:43:34 -07:00
parent b2fa5de54d
commit f3d31f6ef6
2 changed files with 15 additions and 3 deletions
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11
src/exec.cpp
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@ -428,9 +428,16 @@ static bool exec_internal_builtin_proc(parser_t &parser, const std::shared_ptr<j
}
}
// Pull out the IOs for stdout and stderr.
auto out_io = proc_io_chain.io_for_fd(STDOUT_FILENO);
auto err_io = proc_io_chain.io_for_fd(STDERR_FILENO);
// Set up our streams.
streams.stdin_fd = local_builtin_stdin;
streams.out_is_redirected = proc_io_chain.io_for_fd(STDOUT_FILENO) != nullptr;
streams.err_is_redirected = proc_io_chain.io_for_fd(STDERR_FILENO) != nullptr;
streams.out_is_redirected = out_io != nullptr;
streams.err_is_redirected = err_io != nullptr;
streams.out_is_piped = (out_io != nullptr && out_io->io_mode == io_mode_t::pipe);
streams.err_is_piped = (err_io != nullptr && err_io->io_mode == io_mode_t::pipe);
streams.stdin_is_directly_redirected = stdin_is_directly_redirected;
streams.io_chain = &proc_io_chain;

7
src/io.h
View file

@ -451,7 +451,12 @@ struct io_streams_t {
// < foo.txt
bool stdin_is_directly_redirected{false};
// Indicates whether stdout and stderr are redirected (e.g. to a file or piped).
// Indicates whether stdout and stderr are specifically piped.
// If this is set, then the is_redirected flags must also be set.
bool out_is_piped{false};
bool err_is_piped{false};
// Indicates whether stdout and stderr are at all redirected (e.g. to a file or piped).
bool out_is_redirected{false};
bool err_is_redirected{false};